--- /dev/null
+/**************************** hmac.c ****************************/
+/******************** See RFC 4634 for details ******************/
+/*
+ * Description:
+ * This file implements the HMAC algorithm (Keyed-Hashing for
+ * Message Authentication, RFC2104), expressed in terms of the
+ * various SHA algorithms.
+ */
+
+#include "sha.h"
+
+/*
+ * hmac
+ *
+ * Description:
+ * This function will compute an HMAC message digest.
+ *
+ * Parameters:
+ * whichSha: [in]
+ * One of SHA1, SHA224, SHA256, SHA384, SHA512
+ * key: [in]
+ * The secret shared key.
+ * key_len: [in]
+ * The length of the secret shared key.
+ * message_array: [in]
+ * An array of characters representing the message.
+ * length: [in]
+ * The length of the message in message_array
+ * digest: [out]
+ * Where the digest is returned.
+ * NOTE: The length of the digest is determined by
+ * the value of whichSha.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int hmac(SHAversion whichSha, const unsigned char *text, int text_len,
+ const unsigned char *key, int key_len,
+ uint8_t digest[USHAMaxHashSize])
+{
+ HMACContext ctx;
+ return hmacReset(&ctx, whichSha, key, key_len) ||
+ hmacInput(&ctx, text, text_len) ||
+ hmacResult(&ctx, digest);
+}
+
+/*
+ * hmacReset
+ *
+ * Description:
+ * This function will initialize the hmacContext in preparation
+ * for computing a new HMAC message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ * whichSha: [in]
+ * One of SHA1, SHA224, SHA256, SHA384, SHA512
+ * key: [in]
+ * The secret shared key.
+ * key_len: [in]
+ * The length of the secret shared key.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int hmacReset(HMACContext *ctx, enum SHAversion whichSha,
+ const unsigned char *key, int key_len)
+{
+ int i, blocksize, hashsize;
+
+ /* inner padding - key XORd with ipad */
+ unsigned char k_ipad[USHA_Max_Message_Block_Size];
+
+ /* temporary buffer when keylen > blocksize */
+ unsigned char tempkey[USHAMaxHashSize];
+
+ if (!ctx) return shaNull;
+
+ blocksize = ctx->blockSize = USHABlockSize(whichSha);
+ hashsize = ctx->hashSize = USHAHashSize(whichSha);
+
+ ctx->whichSha = whichSha;
+
+ /*
+ * If key is longer than the hash blocksize,
+ * reset it to key = HASH(key).
+ */
+ if (key_len > blocksize) {
+ USHAContext tctx;
+ int err = USHAReset(&tctx, whichSha) ||
+ USHAInput(&tctx, key, key_len) ||
+ USHAResult(&tctx, tempkey);
+ if (err != shaSuccess) return err;
+
+ key = tempkey;
+ key_len = hashsize;
+ }
+
+ /*
+ * The HMAC transform looks like:
+ *
+ * SHA(K XOR opad, SHA(K XOR ipad, text))
+ *
+ * where K is an n byte key.
+ * ipad is the byte 0x36 repeated blocksize times
+ * opad is the byte 0x5c repeated blocksize times
+ * and text is the data being protected.
+ */
+
+ /* store key into the pads, XOR'd with ipad and opad values */
+ for (i = 0; i < key_len; i++) {
+ k_ipad[i] = key[i] ^ 0x36;
+ ctx->k_opad[i] = key[i] ^ 0x5c;
+ }
+ /* remaining pad bytes are '\0' XOR'd with ipad and opad values */
+ for ( ; i < blocksize; i++) {
+ k_ipad[i] = 0x36;
+ ctx->k_opad[i] = 0x5c;
+ }
+
+ /* perform inner hash */
+ /* init context for 1st pass */
+ return USHAReset(&ctx->shaContext, whichSha) ||
+ /* and start with inner pad */
+ USHAInput(&ctx->shaContext, k_ipad, blocksize);
+}
+
+/*
+ * hmacInput
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The HMAC context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int hmacInput(HMACContext *ctx, const unsigned char *text,
+ int text_len)
+{
+ if (!ctx) return shaNull;
+ /* then text of datagram */
+ return USHAInput(&ctx->shaContext, text, text_len);
+}
+
+/*
+ * HMACFinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The HMAC context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int hmacFinalBits(HMACContext *ctx,
+ const uint8_t bits,
+ unsigned int bitcount)
+{
+ if (!ctx) return shaNull;
+ /* then final bits of datagram */
+ return USHAFinalBits(&ctx->shaContext, bits, bitcount);
+}
+
+/*
+ * HMACResult
+ *
+ * Description:
+ * This function will return the N-byte message digest into the
+ * Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the Nth element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the HMAC hash.
+ * digest: [out]
+ * Where the digest is returned.
+ * NOTE 2: The length of the hash is determined by the value of
+ * whichSha that was passed to hmacReset().
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int hmacResult(HMACContext *ctx, uint8_t *digest)
+{
+ if (!ctx) return shaNull;
+
+ /* finish up 1st pass */
+ /* (Use digest here as a temporary buffer.) */
+ return USHAResult(&ctx->shaContext, digest) ||
+
+ /* perform outer SHA */
+ /* init context for 2nd pass */
+ USHAReset(&ctx->shaContext, ctx->whichSha) ||
+
+ /* start with outer pad */
+ USHAInput(&ctx->shaContext, ctx->k_opad, ctx->blockSize) ||
+
+ /* then results of 1st hash */
+ USHAInput(&ctx->shaContext, digest, ctx->hashSize) ||
+
+ /* finish up 2nd pass */
+ USHAResult(&ctx->shaContext, digest);
+}
+
+
+
+
--- /dev/null
+/*************************** sha-private.h ***************************/
+/********************** See RFC 4634 for details *********************/
+#ifndef _SHA_PRIVATE__H
+#define _SHA_PRIVATE__H
+/*
+ * These definitions are defined in FIPS-180-2, section 4.1.
+ * Ch() and Maj() are defined identically in sections 4.1.1,
+ * 4.1.2 and 4.1.3.
+ *
+ * The definitions used in FIPS-180-2 are as follows:
+ */
+
+#ifndef USE_MODIFIED_MACROS
+#define SHA_Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
+#define SHA_Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
+
+#else /* USE_MODIFIED_MACROS */
+/*
+ * The following definitions are equivalent and potentially faster.
+ */
+
+#define SHA_Ch(x, y, z) (((x) & ((y) ^ (z))) ^ (z))
+#define SHA_Maj(x, y, z) (((x) & ((y) | (z))) | ((y) & (z)))
+#endif /* USE_MODIFIED_MACROS */
+
+#define SHA_Parity(x, y, z) ((x) ^ (y) ^ (z))
+
+#endif /* _SHA_PRIVATE__H */
+
--- /dev/null
+/**************************** sha.h ****************************/
+/******************* See RFC 4634 for details ******************/
+#ifndef _SHA_H_
+#define _SHA_H_
+
+/*
+ * Description:
+ * This file implements the Secure Hash Signature Standard
+ * algorithms as defined in the National Institute of Standards
+ * and Technology Federal Information Processing Standards
+ * Publication (FIPS PUB) 180-1 published on April 17, 1995, 180-2
+ * published on August 1, 2002, and the FIPS PUB 180-2 Change
+ * Notice published on February 28, 2004.
+ *
+ * A combined document showing all algorithms is available at
+ * http://csrc.nist.gov/publications/fips/
+ * fips180-2/fips180-2withchangenotice.pdf
+ *
+ * The five hashes are defined in these sizes:
+ * SHA-1 20 byte / 160 bit
+ * SHA-224 28 byte / 224 bit
+ * SHA-256 32 byte / 256 bit
+ * SHA-384 48 byte / 384 bit
+ * SHA-512 64 byte / 512 bit
+ */
+
+#include <stdint.h>
+/*
+ * If you do not have the ISO standard stdint.h header file, then you
+ * must typedef the following:
+ * name meaning
+ * uint64_t unsigned 64 bit integer
+ * uint32_t unsigned 32 bit integer
+ * uint8_t unsigned 8 bit integer (i.e., unsigned char)
+ * int_least16_t integer of >= 16 bits
+ *
+ */
+
+#ifndef _SHA_enum_
+#define _SHA_enum_
+/*
+ * All SHA functions return one of these values.
+ */
+enum {
+ shaSuccess = 0,
+ shaNull, /* Null pointer parameter */
+ shaInputTooLong, /* input data too long */
+ shaStateError, /* called Input after FinalBits or Result */
+ shaBadParam /* passed a bad parameter */
+};
+#endif /* _SHA_enum_ */
+
+/*
+ * These constants hold size information for each of the SHA
+ * hashing operations
+ */
+enum {
+ SHA1_Message_Block_Size = 64, SHA224_Message_Block_Size = 64,
+ SHA256_Message_Block_Size = 64, SHA384_Message_Block_Size = 128,
+ SHA512_Message_Block_Size = 128,
+ USHA_Max_Message_Block_Size = SHA512_Message_Block_Size,
+
+ SHA1HashSize = 20, SHA224HashSize = 28, SHA256HashSize = 32,
+ SHA384HashSize = 48, SHA512HashSize = 64,
+ USHAMaxHashSize = SHA512HashSize,
+
+ SHA1HashSizeBits = 160, SHA224HashSizeBits = 224,
+ SHA256HashSizeBits = 256, SHA384HashSizeBits = 384,
+ SHA512HashSizeBits = 512, USHAMaxHashSizeBits = SHA512HashSizeBits
+};
+
+/*
+ * These constants are used in the USHA (unified sha) functions.
+ */
+typedef enum SHAversion {
+ SHA1, SHA224, SHA256, SHA384, SHA512
+} SHAversion;
+
+/*
+ * This structure will hold context information for the SHA-1
+ * hashing operation.
+ */
+typedef struct SHA1Context {
+ uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest */
+
+ uint32_t Length_Low; /* Message length in bits */
+ uint32_t Length_High; /* Message length in bits */
+
+ int_least16_t Message_Block_Index; /* Message_Block array index */
+ /* 512-bit message blocks */
+ uint8_t Message_Block[SHA1_Message_Block_Size];
+
+ int Computed; /* Is the digest computed? */
+ int Corrupted; /* Is the digest corrupted? */
+} SHA1Context;
+
+/*
+ * This structure will hold context information for the SHA-256
+ * hashing operation.
+ */
+typedef struct SHA256Context {
+ uint32_t Intermediate_Hash[SHA256HashSize/4]; /* Message Digest */
+
+ uint32_t Length_Low; /* Message length in bits */
+ uint32_t Length_High; /* Message length in bits */
+
+ int_least16_t Message_Block_Index; /* Message_Block array index */
+ /* 512-bit message blocks */
+ uint8_t Message_Block[SHA256_Message_Block_Size];
+
+ int Computed; /* Is the digest computed? */
+ int Corrupted; /* Is the digest corrupted? */
+} SHA256Context;
+
+/*
+ * This structure will hold context information for the SHA-512
+ * hashing operation.
+ */
+typedef struct SHA512Context {
+#ifdef USE_32BIT_ONLY
+ uint32_t Intermediate_Hash[SHA512HashSize/4]; /* Message Digest */
+ uint32_t Length[4]; /* Message length in bits */
+#else /* !USE_32BIT_ONLY */
+ uint64_t Intermediate_Hash[SHA512HashSize/8]; /* Message Digest */
+ uint64_t Length_Low, Length_High; /* Message length in bits */
+#endif /* USE_32BIT_ONLY */
+ int_least16_t Message_Block_Index; /* Message_Block array index */
+ /* 1024-bit message blocks */
+ uint8_t Message_Block[SHA512_Message_Block_Size];
+
+ int Computed; /* Is the digest computed?*/
+ int Corrupted; /* Is the digest corrupted? */
+} SHA512Context;
+
+/*
+ * This structure will hold context information for the SHA-224
+ * hashing operation. It uses the SHA-256 structure for computation.
+ */
+typedef struct SHA256Context SHA224Context;
+
+/*
+ * This structure will hold context information for the SHA-384
+ * hashing operation. It uses the SHA-512 structure for computation.
+ */
+typedef struct SHA512Context SHA384Context;
+
+/*
+ * This structure holds context information for all SHA
+ * hashing operations.
+ */
+typedef struct USHAContext {
+ int whichSha; /* which SHA is being used */
+ union {
+ SHA1Context sha1Context;
+ SHA224Context sha224Context; SHA256Context sha256Context;
+ SHA384Context sha384Context; SHA512Context sha512Context;
+ } ctx;
+} USHAContext;
+
+/*
+ * This structure will hold context information for the HMAC
+ * keyed hashing operation.
+ */
+typedef struct HMACContext {
+ int whichSha; /* which SHA is being used */
+ int hashSize; /* hash size of SHA being used */
+ int blockSize; /* block size of SHA being used */
+ USHAContext shaContext; /* SHA context */
+ unsigned char k_opad[USHA_Max_Message_Block_Size];
+ /* outer padding - key XORd with opad */
+} HMACContext;
+
+/*
+ * Function Prototypes
+ */
+
+/* SHA-1 */
+extern int SHA1Reset(SHA1Context *);
+extern int SHA1Input(SHA1Context *, const uint8_t *bytes,
+ unsigned int bytecount);
+extern int SHA1FinalBits(SHA1Context *, const uint8_t bits,
+ unsigned int bitcount);
+extern int SHA1Result(SHA1Context *,
+ uint8_t Message_Digest[SHA1HashSize]);
+
+/* SHA-224 */
+extern int SHA224Reset(SHA224Context *);
+extern int SHA224Input(SHA224Context *, const uint8_t *bytes,
+ unsigned int bytecount);
+extern int SHA224FinalBits(SHA224Context *, const uint8_t bits,
+ unsigned int bitcount);
+extern int SHA224Result(SHA224Context *,
+ uint8_t Message_Digest[SHA224HashSize]);
+
+/* SHA-256 */
+extern int SHA256Reset(SHA256Context *);
+extern int SHA256Input(SHA256Context *, const uint8_t *bytes,
+ unsigned int bytecount);
+extern int SHA256FinalBits(SHA256Context *, const uint8_t bits,
+ unsigned int bitcount);
+extern int SHA256Result(SHA256Context *,
+ uint8_t Message_Digest[SHA256HashSize]);
+
+/* SHA-384 */
+extern int SHA384Reset(SHA384Context *);
+extern int SHA384Input(SHA384Context *, const uint8_t *bytes,
+ unsigned int bytecount);
+extern int SHA384FinalBits(SHA384Context *, const uint8_t bits,
+ unsigned int bitcount);
+extern int SHA384Result(SHA384Context *,
+ uint8_t Message_Digest[SHA384HashSize]);
+
+/* SHA-512 */
+extern int SHA512Reset(SHA512Context *);
+extern int SHA512Input(SHA512Context *, const uint8_t *bytes,
+ unsigned int bytecount);
+extern int SHA512FinalBits(SHA512Context *, const uint8_t bits,
+ unsigned int bitcount);
+extern int SHA512Result(SHA512Context *,
+ uint8_t Message_Digest[SHA512HashSize]);
+
+/* Unified SHA functions, chosen by whichSha */
+extern int USHAReset(USHAContext *, SHAversion whichSha);
+extern int USHAInput(USHAContext *,
+ const uint8_t *bytes, unsigned int bytecount);
+extern int USHAFinalBits(USHAContext *,
+ const uint8_t bits, unsigned int bitcount);
+extern int USHAResult(USHAContext *,
+ uint8_t Message_Digest[USHAMaxHashSize]);
+extern int USHABlockSize(enum SHAversion whichSha);
+extern int USHAHashSize(enum SHAversion whichSha);
+extern int USHAHashSizeBits(enum SHAversion whichSha);
+
+/*
+ * HMAC Keyed-Hashing for Message Authentication, RFC2104,
+ * for all SHAs.
+ * This interface allows a fixed-length text input to be used.
+ */
+extern int hmac(SHAversion whichSha, /* which SHA algorithm to use */
+ const unsigned char *text, /* pointer to data stream */
+ int text_len, /* length of data stream */
+ const unsigned char *key, /* pointer to authentication key */
+ int key_len, /* length of authentication key */
+ uint8_t digest[USHAMaxHashSize]); /* caller digest to fill in */
+
+/*
+ * HMAC Keyed-Hashing for Message Authentication, RFC2104,
+ * for all SHAs.
+ * This interface allows any length of text input to be used.
+ */
+extern int hmacReset(HMACContext *ctx, enum SHAversion whichSha,
+ const unsigned char *key, int key_len);
+extern int hmacInput(HMACContext *ctx, const unsigned char *text,
+ int text_len);
+
+extern int hmacFinalBits(HMACContext *ctx, const uint8_t bits,
+ unsigned int bitcount);
+extern int hmacResult(HMACContext *ctx,
+ uint8_t digest[USHAMaxHashSize]);
+
+#endif /* _SHA_H_ */
--- /dev/null
+/**************************** sha1.c ****************************/
+/******************** See RFC 4634 for details ******************/
+/*
+ * Description:
+ * This file implements the Secure Hash Signature Standard
+ * algorithms as defined in the National Institute of Standards
+ * and Technology Federal Information Processing Standards
+ * Publication (FIPS PUB) 180-1 published on April 17, 1995, 180-2
+ * published on August 1, 2002, and the FIPS PUB 180-2 Change
+ * Notice published on February 28, 2004.
+ *
+ * A combined document showing all algorithms is available at
+ * http://csrc.nist.gov/publications/fips/
+ * fips180-2/fips180-2withchangenotice.pdf
+ *
+ * The SHA-1 algorithm produces a 160-bit message digest for a
+ * given data stream. It should take about 2**n steps to find a
+ * message with the same digest as a given message and
+ * 2**(n/2) to find any two messages with the same digest,
+ * when n is the digest size in bits. Therefore, this
+ * algorithm can serve as a means of providing a
+ * "fingerprint" for a message.
+ *
+ * Portability Issues:
+ * SHA-1 is defined in terms of 32-bit "words". This code
+ * uses <stdint.h> (included via "sha.h") to define 32 and 8
+ * bit unsigned integer types. If your C compiler does not
+ * support 32 bit unsigned integers, this code is not
+ * appropriate.
+ *
+ * Caveats:
+ * SHA-1 is designed to work with messages less than 2^64 bits
+ * long. This implementation uses SHA1Input() to hash the bits
+ * that are a multiple of the size of an 8-bit character, and then
+ * uses SHA1FinalBits() to hash the final few bits of the input.
+ */
+
+#include "sha.h"
+#include "sha-private.h"
+
+/*
+ * Define the SHA1 circular left shift macro
+ */
+#define SHA1_ROTL(bits,word) \
+ (((word) << (bits)) | ((word) >> (32-(bits))))
+
+/*
+ * add "length" to the length
+ */
+static uint32_t addTemp;
+#define SHA1AddLength(context, length) \
+ (addTemp = (context)->Length_Low, \
+ (context)->Corrupted = \
+ (((context)->Length_Low += (length)) < addTemp) && \
+ (++(context)->Length_High == 0) ? 1 : 0)
+
+/* Local Function Prototypes */
+static void SHA1Finalize(SHA1Context *context, uint8_t Pad_Byte);
+static void SHA1PadMessage(SHA1Context *, uint8_t Pad_Byte);
+static void SHA1ProcessMessageBlock(SHA1Context *);
+
+/*
+ * SHA1Reset
+ *
+ * Description:
+ * This function will initialize the SHA1Context in preparation
+ * for computing a new SHA1 message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA1Reset(SHA1Context *context)
+{
+ if (!context)
+ return shaNull;
+
+ context->Length_Low = 0;
+ context->Length_High = 0;
+ context->Message_Block_Index = 0;
+
+ /* Initial Hash Values: FIPS-180-2 section 5.3.1 */
+ context->Intermediate_Hash[0] = 0x67452301;
+ context->Intermediate_Hash[1] = 0xEFCDAB89;
+ context->Intermediate_Hash[2] = 0x98BADCFE;
+ context->Intermediate_Hash[3] = 0x10325476;
+ context->Intermediate_Hash[4] = 0xC3D2E1F0;
+
+ context->Computed = 0;
+ context->Corrupted = 0;
+
+ return shaSuccess;
+}
+
+/*
+ * SHA1Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA1Input(SHA1Context *context,
+ const uint8_t *message_array, unsigned length)
+{
+ if (!length)
+ return shaSuccess;
+
+ if (!context || !message_array)
+ return shaNull;
+
+ if (context->Computed) {
+ context->Corrupted = shaStateError;
+ return shaStateError;
+ }
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ while (length-- && !context->Corrupted) {
+ context->Message_Block[context->Message_Block_Index++] =
+ (*message_array & 0xFF);
+
+ if (!SHA1AddLength(context, 8) &&
+ (context->Message_Block_Index == SHA1_Message_Block_Size))
+ SHA1ProcessMessageBlock(context);
+
+ message_array++;
+ }
+
+ return shaSuccess;
+}
+
+/*
+ * SHA1FinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA1FinalBits(SHA1Context *context, const uint8_t message_bits,
+ unsigned int length)
+{
+ uint8_t masks[8] = {
+ /* 0 0b00000000 */ 0x00, /* 1 0b10000000 */ 0x80,
+ /* 2 0b11000000 */ 0xC0, /* 3 0b11100000 */ 0xE0,
+ /* 4 0b11110000 */ 0xF0, /* 5 0b11111000 */ 0xF8,
+ /* 6 0b11111100 */ 0xFC, /* 7 0b11111110 */ 0xFE
+ };
+ uint8_t markbit[8] = {
+ /* 0 0b10000000 */ 0x80, /* 1 0b01000000 */ 0x40,
+ /* 2 0b00100000 */ 0x20, /* 3 0b00010000 */ 0x10,
+ /* 4 0b00001000 */ 0x08, /* 5 0b00000100 */ 0x04,
+ /* 6 0b00000010 */ 0x02, /* 7 0b00000001 */ 0x01
+ };
+
+ if (!length)
+ return shaSuccess;
+
+ if (!context)
+ return shaNull;
+
+ if (context->Computed || (length >= 8) || (length == 0)) {
+ context->Corrupted = shaStateError;
+ return shaStateError;
+ }
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ SHA1AddLength(context, length);
+ SHA1Finalize(context,
+ (uint8_t) ((message_bits & masks[length]) | markbit[length]));
+
+ return shaSuccess;
+}
+
+/*
+ * SHA1Result
+ *
+ * Description:
+ * This function will return the 160-bit message digest into the
+ * Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 19th element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA-1 hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA1Result(SHA1Context *context,
+ uint8_t Message_Digest[SHA1HashSize])
+{
+ int i;
+
+ if (!context || !Message_Digest)
+ return shaNull;
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ if (!context->Computed)
+ SHA1Finalize(context, 0x80);
+
+ for (i = 0; i < SHA1HashSize; ++i)
+ Message_Digest[i] = (uint8_t) (context->Intermediate_Hash[i>>2]
+ >> 8 * ( 3 - ( i & 0x03 ) ));
+
+ return shaSuccess;
+}
+
+/*
+ * SHA1Finalize
+ *
+ * Description:
+ * This helper function finishes off the digest calculations.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * Pad_Byte: [in]
+ * The last byte to add to the digest before the 0-padding
+ * and length. This will contain the last bits of the message
+ * followed by another single bit. If the message was an
+ * exact multiple of 8-bits long, Pad_Byte will be 0x80.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+static void SHA1Finalize(SHA1Context *context, uint8_t Pad_Byte)
+{
+ int i;
+ SHA1PadMessage(context, Pad_Byte);
+ /* message may be sensitive, clear it out */
+ for (i = 0; i < SHA1_Message_Block_Size; ++i)
+ context->Message_Block[i] = 0;
+ context->Length_Low = 0; /* and clear length */
+ context->Length_High = 0;
+ context->Computed = 1;
+}
+
+/*
+ * SHA1PadMessage
+ *
+ * Description:
+ * According to the standard, the message must be padded to an
+ * even 512 bits. The first padding bit must be a '1'. The last
+ * 64 bits represent the length of the original message. All bits
+ * in between should be 0. This helper function will pad the
+ * message according to those rules by filling the Message_Block
+ * array accordingly. When it returns, it can be assumed that the
+ * message digest has been computed.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to pad
+ * Pad_Byte: [in]
+ * The last byte to add to the digest before the 0-padding
+ * and length. This will contain the last bits of the message
+ * followed by another single bit. If the message was an
+ * exact multiple of 8-bits long, Pad_Byte will be 0x80.
+ *
+ * Returns:
+ * Nothing.
+ */
+static void SHA1PadMessage(SHA1Context *context, uint8_t Pad_Byte)
+{
+ /*
+ * Check to see if the current message block is too small to hold
+ * the initial padding bits and length. If so, we will pad the
+ * block, process it, and then continue padding into a second
+ * block.
+ */
+ if (context->Message_Block_Index >= (SHA1_Message_Block_Size - 8)) {
+ context->Message_Block[context->Message_Block_Index++] = Pad_Byte;
+ while (context->Message_Block_Index < SHA1_Message_Block_Size)
+ context->Message_Block[context->Message_Block_Index++] = 0;
+
+ SHA1ProcessMessageBlock(context);
+ } else
+ context->Message_Block[context->Message_Block_Index++] = Pad_Byte;
+
+ while (context->Message_Block_Index < (SHA1_Message_Block_Size - 8))
+ context->Message_Block[context->Message_Block_Index++] = 0;
+
+ /*
+ * Store the message length as the last 8 octets
+ */
+ context->Message_Block[56] = (uint8_t) (context->Length_High >> 24);
+ context->Message_Block[57] = (uint8_t) (context->Length_High >> 16);
+ context->Message_Block[58] = (uint8_t) (context->Length_High >> 8);
+ context->Message_Block[59] = (uint8_t) (context->Length_High);
+ context->Message_Block[60] = (uint8_t) (context->Length_Low >> 24);
+ context->Message_Block[61] = (uint8_t) (context->Length_Low >> 16);
+ context->Message_Block[62] = (uint8_t) (context->Length_Low >> 8);
+ context->Message_Block[63] = (uint8_t) (context->Length_Low);
+
+ SHA1ProcessMessageBlock(context);
+}
+
+/*
+ * SHA1ProcessMessageBlock
+ *
+ * Description:
+ * This helper function will process the next 512 bits of the
+ * message stored in the Message_Block array.
+ *
+ * Parameters:
+ * None.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ * Many of the variable names in this code, especially the
+ * single character names, were used because those were the
+ * names used in the publication.
+ */
+static void SHA1ProcessMessageBlock(SHA1Context *context)
+{
+ /* Constants defined in FIPS-180-2, section 4.2.1 */
+ const uint32_t K[4] = {
+ 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6
+ };
+ int t; /* Loop counter */
+ uint32_t temp; /* Temporary word value */
+ uint32_t W[80]; /* Word sequence */
+ uint32_t A, B, C, D, E; /* Word buffers */
+
+ /*
+ * Initialize the first 16 words in the array W
+ */
+ for (t = 0; t < 16; t++) {
+ W[t] = ((uint32_t)context->Message_Block[t * 4]) << 24;
+ W[t] |= ((uint32_t)context->Message_Block[t * 4 + 1]) << 16;
+ W[t] |= ((uint32_t)context->Message_Block[t * 4 + 2]) << 8;
+ W[t] |= ((uint32_t)context->Message_Block[t * 4 + 3]);
+ }
+ for (t = 16; t < 80; t++)
+ W[t] = SHA1_ROTL(1, W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
+
+ A = context->Intermediate_Hash[0];
+ B = context->Intermediate_Hash[1];
+ C = context->Intermediate_Hash[2];
+ D = context->Intermediate_Hash[3];
+ E = context->Intermediate_Hash[4];
+
+ for (t = 0; t < 20; t++) {
+ temp = SHA1_ROTL(5,A) + SHA_Ch(B, C, D) + E + W[t] + K[0];
+ E = D;
+ D = C;
+ C = SHA1_ROTL(30,B);
+ B = A;
+ A = temp;
+ }
+
+ for (t = 20; t < 40; t++) {
+ temp = SHA1_ROTL(5,A) + SHA_Parity(B, C, D) + E + W[t] + K[1];
+ E = D;
+ D = C;
+ C = SHA1_ROTL(30,B);
+ B = A;
+ A = temp;
+ }
+
+ for (t = 40; t < 60; t++) {
+ temp = SHA1_ROTL(5,A) + SHA_Maj(B, C, D) + E + W[t] + K[2];
+ E = D;
+ D = C;
+ C = SHA1_ROTL(30,B);
+ B = A;
+ A = temp;
+ }
+
+ for (t = 60; t < 80; t++) {
+ temp = SHA1_ROTL(5,A) + SHA_Parity(B, C, D) + E + W[t] + K[3];
+ E = D;
+ D = C;
+ C = SHA1_ROTL(30,B);
+ B = A;
+ A = temp;
+ }
+
+ context->Intermediate_Hash[0] += A;
+ context->Intermediate_Hash[1] += B;
+ context->Intermediate_Hash[2] += C;
+ context->Intermediate_Hash[3] += D;
+ context->Intermediate_Hash[4] += E;
+
+ context->Message_Block_Index = 0;
+}
+
--- /dev/null
+/*************************** sha224-256.c ***************************/
+/********************* See RFC 4634 for details *********************/
+/*
+ * Description:
+ * This file implements the Secure Hash Signature Standard
+ * algorithms as defined in the National Institute of Standards
+ * and Technology Federal Information Processing Standards
+ * Publication (FIPS PUB) 180-1 published on April 17, 1995, 180-2
+ * published on August 1, 2002, and the FIPS PUB 180-2 Change
+ * Notice published on February 28, 2004.
+ *
+ * A combined document showing all algorithms is available at
+ * http://csrc.nist.gov/publications/fips/
+ * fips180-2/fips180-2withchangenotice.pdf
+ *
+ * The SHA-224 and SHA-256 algorithms produce 224-bit and 256-bit
+ * message digests for a given data stream. It should take about
+ * 2**n steps to find a message with the same digest as a given
+ * message and 2**(n/2) to find any two messages with the same
+ * digest, when n is the digest size in bits. Therefore, this
+ * algorithm can serve as a means of providing a
+ * "fingerprint" for a message.
+ *
+ * Portability Issues:
+ * SHA-224 and SHA-256 are defined in terms of 32-bit "words".
+ * This code uses <stdint.h> (included via "sha.h") to define 32
+ * and 8 bit unsigned integer types. If your C compiler does not
+ * support 32 bit unsigned integers, this code is not
+ * appropriate.
+ *
+ * Caveats:
+ * SHA-224 and SHA-256 are designed to work with messages less
+ * than 2^64 bits long. This implementation uses SHA224/256Input()
+ * to hash the bits that are a multiple of the size of an 8-bit
+ * character, and then uses SHA224/256FinalBits() to hash the
+ * final few bits of the input.
+ */
+
+#include "sha.h"
+#include "sha-private.h"
+/* Define the SHA shift, rotate left and rotate right macro */
+#define SHA256_SHR(bits,word) ((word) >> (bits))
+#define SHA256_ROTL(bits,word) \
+ (((word) << (bits)) | ((word) >> (32-(bits))))
+#define SHA256_ROTR(bits,word) \
+ (((word) >> (bits)) | ((word) << (32-(bits))))
+
+/* Define the SHA SIGMA and sigma macros */
+#define SHA256_SIGMA0(word) \
+ (SHA256_ROTR( 2,word) ^ SHA256_ROTR(13,word) ^ SHA256_ROTR(22,word))
+#define SHA256_SIGMA1(word) \
+ (SHA256_ROTR( 6,word) ^ SHA256_ROTR(11,word) ^ SHA256_ROTR(25,word))
+#define SHA256_sigma0(word) \
+ (SHA256_ROTR( 7,word) ^ SHA256_ROTR(18,word) ^ SHA256_SHR( 3,word))
+#define SHA256_sigma1(word) \
+ (SHA256_ROTR(17,word) ^ SHA256_ROTR(19,word) ^ SHA256_SHR(10,word))
+
+/*
+ * add "length" to the length
+ */
+static uint32_t addTemp;
+#define SHA224_256AddLength(context, length) \
+ (addTemp = (context)->Length_Low, (context)->Corrupted = \
+ (((context)->Length_Low += (length)) < addTemp) && \
+ (++(context)->Length_High == 0) ? 1 : 0)
+
+/* Local Function Prototypes */
+static void SHA224_256Finalize(SHA256Context *context,
+ uint8_t Pad_Byte);
+static void SHA224_256PadMessage(SHA256Context *context,
+ uint8_t Pad_Byte);
+static void SHA224_256ProcessMessageBlock(SHA256Context *context);
+static int SHA224_256Reset(SHA256Context *context, uint32_t *H0);
+static int SHA224_256ResultN(SHA256Context *context,
+ uint8_t Message_Digest[], int HashSize);
+
+/* Initial Hash Values: FIPS-180-2 Change Notice 1 */
+static uint32_t SHA224_H0[SHA256HashSize/4] = {
+ 0xC1059ED8, 0x367CD507, 0x3070DD17, 0xF70E5939,
+ 0xFFC00B31, 0x68581511, 0x64F98FA7, 0xBEFA4FA4
+};
+
+/* Initial Hash Values: FIPS-180-2 section 5.3.2 */
+static uint32_t SHA256_H0[SHA256HashSize/4] = {
+ 0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A,
+ 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19
+};
+
+/*
+ * SHA224Reset
+ *
+ * Description:
+ * This function will initialize the SHA384Context in preparation
+ * for computing a new SHA224 message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA224Reset(SHA224Context *context)
+{
+ return SHA224_256Reset(context, SHA224_H0);
+}
+
+/*
+ * SHA224Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA224Input(SHA224Context *context, const uint8_t *message_array,
+ unsigned int length)
+{
+ return SHA256Input(context, message_array, length);
+}
+
+/*
+ * SHA224FinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA224FinalBits( SHA224Context *context,
+ const uint8_t message_bits, unsigned int length)
+{
+ return SHA256FinalBits(context, message_bits, length);
+}
+
+/*
+ * SHA224Result
+ *
+ * Description:
+ * This function will return the 224-bit message
+ * digest into the Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 28th element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA224Result(SHA224Context *context,
+ uint8_t Message_Digest[SHA224HashSize])
+{
+ return SHA224_256ResultN(context, Message_Digest, SHA224HashSize);
+}
+
+/*
+ * SHA256Reset
+ *
+ * Description:
+ * This function will initialize the SHA256Context in preparation
+ * for computing a new SHA256 message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA256Reset(SHA256Context *context)
+{
+ return SHA224_256Reset(context, SHA256_H0);
+}
+
+/*
+ * SHA256Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA256Input(SHA256Context *context, const uint8_t *message_array,
+ unsigned int length)
+{
+ if (!length)
+ return shaSuccess;
+
+ if (!context || !message_array)
+ return shaNull;
+
+ if (context->Computed) {
+ context->Corrupted = shaStateError;
+ return shaStateError;
+ }
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ while (length-- && !context->Corrupted) {
+ context->Message_Block[context->Message_Block_Index++] =
+ (*message_array & 0xFF);
+
+ if (!SHA224_256AddLength(context, 8) &&
+ (context->Message_Block_Index == SHA256_Message_Block_Size))
+ SHA224_256ProcessMessageBlock(context);
+
+ message_array++;
+ }
+
+ return shaSuccess;
+
+}
+
+/*
+ * SHA256FinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA256FinalBits(SHA256Context *context,
+ const uint8_t message_bits, unsigned int length)
+{
+ uint8_t masks[8] = {
+ /* 0 0b00000000 */ 0x00, /* 1 0b10000000 */ 0x80,
+ /* 2 0b11000000 */ 0xC0, /* 3 0b11100000 */ 0xE0,
+ /* 4 0b11110000 */ 0xF0, /* 5 0b11111000 */ 0xF8,
+ /* 6 0b11111100 */ 0xFC, /* 7 0b11111110 */ 0xFE
+ };
+ uint8_t markbit[8] = {
+ /* 0 0b10000000 */ 0x80, /* 1 0b01000000 */ 0x40,
+ /* 2 0b00100000 */ 0x20, /* 3 0b00010000 */ 0x10,
+ /* 4 0b00001000 */ 0x08, /* 5 0b00000100 */ 0x04,
+ /* 6 0b00000010 */ 0x02, /* 7 0b00000001 */ 0x01
+ };
+
+ if (!length)
+ return shaSuccess;
+
+ if (!context)
+ return shaNull;
+
+ if ((context->Computed) || (length >= 8) || (length == 0)) {
+ context->Corrupted = shaStateError;
+ return shaStateError;
+ }
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ SHA224_256AddLength(context, length);
+ SHA224_256Finalize(context, (uint8_t)
+ ((message_bits & masks[length]) | markbit[length]));
+
+ return shaSuccess;
+}
+
+/*
+ * SHA256Result
+ *
+ * Description:
+ * This function will return the 256-bit message
+ * digest into the Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 32nd element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int SHA256Result(SHA256Context *context, uint8_t Message_Digest[])
+{
+ return SHA224_256ResultN(context, Message_Digest, SHA256HashSize);
+}
+
+/*
+ * SHA224_256Finalize
+ *
+ * Description:
+ * This helper function finishes off the digest calculations.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * Pad_Byte: [in]
+ * The last byte to add to the digest before the 0-padding
+ * and length. This will contain the last bits of the message
+ * followed by another single bit. If the message was an
+ * exact multiple of 8-bits long, Pad_Byte will be 0x80.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+static void SHA224_256Finalize(SHA256Context *context,
+ uint8_t Pad_Byte)
+{
+ int i;
+ SHA224_256PadMessage(context, Pad_Byte);
+ /* message may be sensitive, so clear it out */
+ for (i = 0; i < SHA256_Message_Block_Size; ++i)
+ context->Message_Block[i] = 0;
+ context->Length_Low = 0; /* and clear length */
+ context->Length_High = 0;
+ context->Computed = 1;
+}
+
+/*
+ * SHA224_256PadMessage
+ *
+ * Description:
+ * According to the standard, the message must be padded to an
+ * even 512 bits. The first padding bit must be a '1'. The
+ * last 64 bits represent the length of the original message.
+ * All bits in between should be 0. This helper function will pad
+ * the message according to those rules by filling the
+ * Message_Block array accordingly. When it returns, it can be
+ * assumed that the message digest has been computed.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to pad
+ * Pad_Byte: [in]
+ * The last byte to add to the digest before the 0-padding
+ * and length. This will contain the last bits of the message
+ * followed by another single bit. If the message was an
+ * exact multiple of 8-bits long, Pad_Byte will be 0x80.
+ *
+ * Returns:
+ * Nothing.
+ */
+static void SHA224_256PadMessage(SHA256Context *context,
+ uint8_t Pad_Byte)
+{
+ /*
+ * Check to see if the current message block is too small to hold
+ * the initial padding bits and length. If so, we will pad the
+ * block, process it, and then continue padding into a second
+ * block.
+ */
+ if (context->Message_Block_Index >= (SHA256_Message_Block_Size-8)) {
+ context->Message_Block[context->Message_Block_Index++] = Pad_Byte;
+ while (context->Message_Block_Index < SHA256_Message_Block_Size)
+ context->Message_Block[context->Message_Block_Index++] = 0;
+ SHA224_256ProcessMessageBlock(context);
+ } else
+ context->Message_Block[context->Message_Block_Index++] = Pad_Byte;
+
+ while (context->Message_Block_Index < (SHA256_Message_Block_Size-8))
+ context->Message_Block[context->Message_Block_Index++] = 0;
+
+ /*
+ * Store the message length as the last 8 octets
+ */
+ context->Message_Block[56] = (uint8_t)(context->Length_High >> 24);
+ context->Message_Block[57] = (uint8_t)(context->Length_High >> 16);
+ context->Message_Block[58] = (uint8_t)(context->Length_High >> 8);
+ context->Message_Block[59] = (uint8_t)(context->Length_High);
+ context->Message_Block[60] = (uint8_t)(context->Length_Low >> 24);
+ context->Message_Block[61] = (uint8_t)(context->Length_Low >> 16);
+ context->Message_Block[62] = (uint8_t)(context->Length_Low >> 8);
+ context->Message_Block[63] = (uint8_t)(context->Length_Low);
+
+ SHA224_256ProcessMessageBlock(context);
+}
+
+/*
+ * SHA224_256ProcessMessageBlock
+ *
+ * Description:
+ * This function will process the next 512 bits of the message
+ * stored in the Message_Block array.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ * Many of the variable names in this code, especially the
+ * single character names, were used because those were the
+ * names used in the publication.
+ */
+static void SHA224_256ProcessMessageBlock(SHA256Context *context)
+{
+ /* Constants defined in FIPS-180-2, section 4.2.2 */
+ static const uint32_t K[64] = {
+ 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b,
+ 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01,
+ 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7,
+ 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
+ 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152,
+ 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
+ 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc,
+ 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+ 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819,
+ 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08,
+ 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f,
+ 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
+ 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+ };
+ int t, t4; /* Loop counter */
+ uint32_t temp1, temp2; /* Temporary word value */
+ uint32_t W[64]; /* Word sequence */
+ uint32_t A, B, C, D, E, F, G, H; /* Word buffers */
+
+ /*
+ * Initialize the first 16 words in the array W
+ */
+ for (t = t4 = 0; t < 16; t++, t4 += 4)
+ W[t] = (((uint32_t)context->Message_Block[t4]) << 24) |
+ (((uint32_t)context->Message_Block[t4 + 1]) << 16) |
+ (((uint32_t)context->Message_Block[t4 + 2]) << 8) |
+ (((uint32_t)context->Message_Block[t4 + 3]));
+
+ for (t = 16; t < 64; t++)
+ W[t] = SHA256_sigma1(W[t-2]) + W[t-7] +
+ SHA256_sigma0(W[t-15]) + W[t-16];
+
+ A = context->Intermediate_Hash[0];
+ B = context->Intermediate_Hash[1];
+ C = context->Intermediate_Hash[2];
+ D = context->Intermediate_Hash[3];
+ E = context->Intermediate_Hash[4];
+ F = context->Intermediate_Hash[5];
+ G = context->Intermediate_Hash[6];
+ H = context->Intermediate_Hash[7];
+
+ for (t = 0; t < 64; t++) {
+ temp1 = H + SHA256_SIGMA1(E) + SHA_Ch(E,F,G) + K[t] + W[t];
+ temp2 = SHA256_SIGMA0(A) + SHA_Maj(A,B,C);
+ H = G;
+ G = F;
+ F = E;
+ E = D + temp1;
+ D = C;
+ C = B;
+ B = A;
+ A = temp1 + temp2;
+ }
+
+ context->Intermediate_Hash[0] += A;
+ context->Intermediate_Hash[1] += B;
+ context->Intermediate_Hash[2] += C;
+ context->Intermediate_Hash[3] += D;
+ context->Intermediate_Hash[4] += E;
+ context->Intermediate_Hash[5] += F;
+ context->Intermediate_Hash[6] += G;
+ context->Intermediate_Hash[7] += H;
+
+ context->Message_Block_Index = 0;
+}
+
+/*
+ * SHA224_256Reset
+ *
+ * Description:
+ * This helper function will initialize the SHA256Context in
+ * preparation for computing a new SHA256 message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ * H0
+ * The initial hash value to use.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+static int SHA224_256Reset(SHA256Context *context, uint32_t *H0)
+{
+ if (!context)
+ return shaNull;
+
+ context->Length_Low = 0;
+ context->Length_High = 0;
+ context->Message_Block_Index = 0;
+
+ context->Intermediate_Hash[0] = H0[0];
+ context->Intermediate_Hash[1] = H0[1];
+ context->Intermediate_Hash[2] = H0[2];
+ context->Intermediate_Hash[3] = H0[3];
+ context->Intermediate_Hash[4] = H0[4];
+ context->Intermediate_Hash[5] = H0[5];
+ context->Intermediate_Hash[6] = H0[6];
+ context->Intermediate_Hash[7] = H0[7];
+
+ context->Computed = 0;
+ context->Corrupted = 0;
+
+ return shaSuccess;
+}
+
+/*
+ * SHA224_256ResultN
+ *
+ * Description:
+ * This helper function will return the 224-bit or 256-bit message
+ * digest into the Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 28th/32nd element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ * HashSize: [in]
+ * The size of the hash, either 28 or 32.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+static int SHA224_256ResultN(SHA256Context *context,
+ uint8_t Message_Digest[], int HashSize)
+{
+ int i;
+
+ if (!context || !Message_Digest)
+ return shaNull;
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ if (!context->Computed)
+ SHA224_256Finalize(context, 0x80);
+
+ for (i = 0; i < HashSize; ++i)
+ Message_Digest[i] = (uint8_t)
+ (context->Intermediate_Hash[i>>2] >> 8 * ( 3 - ( i & 0x03 ) ));
+
+ return shaSuccess;
+}
--- /dev/null
+/*************************** sha384-512.c ***************************/
+/********************* See RFC 4634 for details *********************/
+/*
+ * Description:
+ * This file implements the Secure Hash Signature Standard
+ * algorithms as defined in the National Institute of Standards
+ * and Technology Federal Information Processing Standards
+ * Publication (FIPS PUB) 180-1 published on April 17, 1995, 180-2
+ * published on August 1, 2002, and the FIPS PUB 180-2 Change
+ * Notice published on February 28, 2004.
+ *
+ * A combined document showing all algorithms is available at
+ * http://csrc.nist.gov/publications/fips/
+ * fips180-2/fips180-2withchangenotice.pdf
+ *
+ * The SHA-384 and SHA-512 algorithms produce 384-bit and 512-bit
+ * message digests for a given data stream. It should take about
+ * 2**n steps to find a message with the same digest as a given
+ * message and 2**(n/2) to find any two messages with the same
+ * digest, when n is the digest size in bits. Therefore, this
+ * algorithm can serve as a means of providing a
+ * "fingerprint" for a message.
+ *
+ * Portability Issues:
+ * SHA-384 and SHA-512 are defined in terms of 64-bit "words",
+ * but if USE_32BIT_ONLY is #defined, this code is implemented in
+ * terms of 32-bit "words". This code uses <stdint.h> (included
+ * via "sha.h") to define the 64, 32 and 8 bit unsigned integer
+ * types. If your C compiler does not support 64 bit unsigned
+ * integers, and you do not #define USE_32BIT_ONLY, this code is
+ * not appropriate.
+ *
+ * Caveats:
+ * SHA-384 and SHA-512 are designed to work with messages less
+ * than 2^128 bits long. This implementation uses
+ * SHA384/512Input() to hash the bits that are a multiple of the
+ * size of an 8-bit character, and then uses SHA384/256FinalBits()
+ * to hash the final few bits of the input.
+ *
+ */
+
+#include "sha.h"
+#include "sha-private.h"
+
+#ifdef USE_32BIT_ONLY
+/*
+ * Define 64-bit arithmetic in terms of 32-bit arithmetic.
+ * Each 64-bit number is represented in a 2-word array.
+ * All macros are defined such that the result is the last parameter.
+ */
+
+/*
+ * Define shift, rotate left and rotate right functions
+ */
+#define SHA512_SHR(bits, word, ret) ( \
+ /* (((uint64_t)((word))) >> (bits)) */ \
+ (ret)[0] = (((bits) < 32) && ((bits) >= 0)) ? \
+ ((word)[0] >> (bits)) : 0, \
+ (ret)[1] = ((bits) > 32) ? ((word)[0] >> ((bits) - 32)) : \
+ ((bits) == 32) ? (word)[0] : \
+ ((bits) >= 0) ? \
+ (((word)[0] << (32 - (bits))) | \
+ ((word)[1] >> (bits))) : 0 )
+
+#define SHA512_SHL(bits, word, ret) ( \
+ /* (((uint64_t)(word)) << (bits)) */ \
+ (ret)[0] = ((bits) > 32) ? ((word)[1] << ((bits) - 32)) : \
+ ((bits) == 32) ? (word)[1] : \
+ ((bits) >= 0) ? \
+ (((word)[0] << (bits)) | \
+ ((word)[1] >> (32 - (bits)))) : \
+ 0, \
+ (ret)[1] = (((bits) < 32) && ((bits) >= 0)) ? \
+ ((word)[1] << (bits)) : 0 )
+
+/*
+ * Define 64-bit OR
+ */
+#define SHA512_OR(word1, word2, ret) ( \
+ (ret)[0] = (word1)[0] | (word2)[0], \
+ (ret)[1] = (word1)[1] | (word2)[1] )
+
+/*
+ * Define 64-bit XOR
+ */
+#define SHA512_XOR(word1, word2, ret) ( \
+ (ret)[0] = (word1)[0] ^ (word2)[0], \
+ (ret)[1] = (word1)[1] ^ (word2)[1] )
+
+/*
+ * Define 64-bit AND
+ */
+#define SHA512_AND(word1, word2, ret) ( \
+ (ret)[0] = (word1)[0] & (word2)[0], \
+ (ret)[1] = (word1)[1] & (word2)[1] )
+
+/*
+ * Define 64-bit TILDA
+ */
+#define SHA512_TILDA(word, ret) \
+ ( (ret)[0] = ~(word)[0], (ret)[1] = ~(word)[1] )
+
+/*
+ * Define 64-bit ADD
+ */
+#define SHA512_ADD(word1, word2, ret) ( \
+ (ret)[1] = (word1)[1], (ret)[1] += (word2)[1], \
+ (ret)[0] = (word1)[0] + (word2)[0] + ((ret)[1] < (word1)[1]) )
+
+/*
+ * Add the 4word value in word2 to word1.
+ */
+static uint32_t ADDTO4_temp, ADDTO4_temp2;
+#define SHA512_ADDTO4(word1, word2) ( \
+ ADDTO4_temp = (word1)[3], \
+ (word1)[3] += (word2)[3], \
+ ADDTO4_temp2 = (word1)[2], \
+ (word1)[2] += (word2)[2] + ((word1)[3] < ADDTO4_temp), \
+ ADDTO4_temp = (word1)[1], \
+ (word1)[1] += (word2)[1] + ((word1)[2] < ADDTO4_temp2), \
+ (word1)[0] += (word2)[0] + ((word1)[1] < ADDTO4_temp) )
+
+/*
+ * Add the 2word value in word2 to word1.
+ */
+static uint32_t ADDTO2_temp;
+#define SHA512_ADDTO2(word1, word2) ( \
+ ADDTO2_temp = (word1)[1], \
+ (word1)[1] += (word2)[1], \
+ (word1)[0] += (word2)[0] + ((word1)[1] < ADDTO2_temp) )
+
+/*
+ * SHA rotate ((word >> bits) | (word << (64-bits)))
+ */
+static uint32_t ROTR_temp1[2], ROTR_temp2[2];
+#define SHA512_ROTR(bits, word, ret) ( \
+ SHA512_SHR((bits), (word), ROTR_temp1), \
+ SHA512_SHL(64-(bits), (word), ROTR_temp2), \
+ SHA512_OR(ROTR_temp1, ROTR_temp2, (ret)) )
+
+/*
+ * Define the SHA SIGMA and sigma macros
+ * SHA512_ROTR(28,word) ^ SHA512_ROTR(34,word) ^ SHA512_ROTR(39,word)
+ */
+static uint32_t SIGMA0_temp1[2], SIGMA0_temp2[2],
+ SIGMA0_temp3[2], SIGMA0_temp4[2];
+#define SHA512_SIGMA0(word, ret) ( \
+ SHA512_ROTR(28, (word), SIGMA0_temp1), \
+ SHA512_ROTR(34, (word), SIGMA0_temp2), \
+ SHA512_ROTR(39, (word), SIGMA0_temp3), \
+ SHA512_XOR(SIGMA0_temp2, SIGMA0_temp3, SIGMA0_temp4), \
+ SHA512_XOR(SIGMA0_temp1, SIGMA0_temp4, (ret)) )
+
+/*
+ * SHA512_ROTR(14,word) ^ SHA512_ROTR(18,word) ^ SHA512_ROTR(41,word)
+ */
+static uint32_t SIGMA1_temp1[2], SIGMA1_temp2[2],
+ SIGMA1_temp3[2], SIGMA1_temp4[2];
+#define SHA512_SIGMA1(word, ret) ( \
+ SHA512_ROTR(14, (word), SIGMA1_temp1), \
+ SHA512_ROTR(18, (word), SIGMA1_temp2), \
+ SHA512_ROTR(41, (word), SIGMA1_temp3), \
+ SHA512_XOR(SIGMA1_temp2, SIGMA1_temp3, SIGMA1_temp4), \
+ SHA512_XOR(SIGMA1_temp1, SIGMA1_temp4, (ret)) )
+
+/*
+ * (SHA512_ROTR( 1,word) ^ SHA512_ROTR( 8,word) ^ SHA512_SHR( 7,word))
+ */
+static uint32_t sigma0_temp1[2], sigma0_temp2[2],
+ sigma0_temp3[2], sigma0_temp4[2];
+#define SHA512_sigma0(word, ret) ( \
+ SHA512_ROTR( 1, (word), sigma0_temp1), \
+ SHA512_ROTR( 8, (word), sigma0_temp2), \
+ SHA512_SHR( 7, (word), sigma0_temp3), \
+ SHA512_XOR(sigma0_temp2, sigma0_temp3, sigma0_temp4), \
+ SHA512_XOR(sigma0_temp1, sigma0_temp4, (ret)) )
+
+/*
+ * (SHA512_ROTR(19,word) ^ SHA512_ROTR(61,word) ^ SHA512_SHR( 6,word))
+ */
+static uint32_t sigma1_temp1[2], sigma1_temp2[2],
+ sigma1_temp3[2], sigma1_temp4[2];
+#define SHA512_sigma1(word, ret) ( \
+ SHA512_ROTR(19, (word), sigma1_temp1), \
+ SHA512_ROTR(61, (word), sigma1_temp2), \
+ SHA512_SHR( 6, (word), sigma1_temp3), \
+ SHA512_XOR(sigma1_temp2, sigma1_temp3, sigma1_temp4), \
+ SHA512_XOR(sigma1_temp1, sigma1_temp4, (ret)) )
+
+#undef SHA_Ch
+#undef SHA_Maj
+
+#ifndef USE_MODIFIED_MACROS
+/*
+ * These definitions are the ones used in FIPS-180-2, section 4.1.3
+ * Ch(x,y,z) ((x & y) ^ (~x & z))
+ */
+static uint32_t Ch_temp1[2], Ch_temp2[2], Ch_temp3[2];
+#define SHA_Ch(x, y, z, ret) ( \
+ SHA512_AND(x, y, Ch_temp1), \
+ SHA512_TILDA(x, Ch_temp2), \
+ SHA512_AND(Ch_temp2, z, Ch_temp3), \
+ SHA512_XOR(Ch_temp1, Ch_temp3, (ret)) )
+/*
+ * Maj(x,y,z) (((x)&(y)) ^ ((x)&(z)) ^ ((y)&(z)))
+ */
+static uint32_t Maj_temp1[2], Maj_temp2[2],
+ Maj_temp3[2], Maj_temp4[2];
+#define SHA_Maj(x, y, z, ret) ( \
+ SHA512_AND(x, y, Maj_temp1), \
+ SHA512_AND(x, z, Maj_temp2), \
+ SHA512_AND(y, z, Maj_temp3), \
+ SHA512_XOR(Maj_temp2, Maj_temp3, Maj_temp4), \
+ SHA512_XOR(Maj_temp1, Maj_temp4, (ret)) )
+
+#else /* !USE_32BIT_ONLY */
+/*
+ * These definitions are potentially faster equivalents for the ones
+ * used in FIPS-180-2, section 4.1.3.
+ * ((x & y) ^ (~x & z)) becomes
+ * ((x & (y ^ z)) ^ z)
+ */
+#define SHA_Ch(x, y, z, ret) ( \
+ (ret)[0] = (((x)[0] & ((y)[0] ^ (z)[0])) ^ (z)[0]), \
+ (ret)[1] = (((x)[1] & ((y)[1] ^ (z)[1])) ^ (z)[1]) )
+
+/*
+ * ((x & y) ^ (x & z) ^ (y & z)) becomes
+ * ((x & (y | z)) | (y & z))
+ */
+#define SHA_Maj(x, y, z, ret) ( \
+ ret[0] = (((x)[0] & ((y)[0] | (z)[0])) | ((y)[0] & (z)[0])), \
+ ret[1] = (((x)[1] & ((y)[1] | (z)[1])) | ((y)[1] & (z)[1])) )
+#endif /* USE_MODIFIED_MACROS */
+
+/*
+ * add "length" to the length
+ */
+static uint32_t addTemp[4] = { 0, 0, 0, 0 };
+#define SHA384_512AddLength(context, length) ( \
+ addTemp[3] = (length), SHA512_ADDTO4((context)->Length, addTemp), \
+ (context)->Corrupted = (((context)->Length[3] == 0) && \
+ ((context)->Length[2] == 0) && ((context)->Length[1] == 0) && \
+ ((context)->Length[0] < 8)) ? 1 : 0 )
+
+/* Local Function Prototypes */
+static void SHA384_512Finalize(SHA512Context *context,
+ uint8_t Pad_Byte);
+static void SHA384_512PadMessage(SHA512Context *context,
+ uint8_t Pad_Byte);
+static void SHA384_512ProcessMessageBlock(SHA512Context *context);
+static int SHA384_512Reset(SHA512Context *context, uint32_t H0[]);
+static int SHA384_512ResultN( SHA512Context *context,
+ uint8_t Message_Digest[], int HashSize);
+
+/* Initial Hash Values: FIPS-180-2 sections 5.3.3 and 5.3.4 */
+static uint32_t SHA384_H0[SHA512HashSize/4] = {
+ 0xCBBB9D5D, 0xC1059ED8, 0x629A292A, 0x367CD507, 0x9159015A,
+ 0x3070DD17, 0x152FECD8, 0xF70E5939, 0x67332667, 0xFFC00B31,
+ 0x8EB44A87, 0x68581511, 0xDB0C2E0D, 0x64F98FA7, 0x47B5481D,
+ 0xBEFA4FA4
+};
+
+static uint32_t SHA512_H0[SHA512HashSize/4] = {
+ 0x6A09E667, 0xF3BCC908, 0xBB67AE85, 0x84CAA73B, 0x3C6EF372,
+ 0xFE94F82B, 0xA54FF53A, 0x5F1D36F1, 0x510E527F, 0xADE682D1,
+ 0x9B05688C, 0x2B3E6C1F, 0x1F83D9AB, 0xFB41BD6B, 0x5BE0CD19,
+ 0x137E2179
+};
+
+#else /* !USE_32BIT_ONLY */
+
+/* Define the SHA shift, rotate left and rotate right macro */
+#define SHA512_SHR(bits,word) (((uint64_t)(word)) >> (bits))
+#define SHA512_ROTR(bits,word) ((((uint64_t)(word)) >> (bits)) | \
+ (((uint64_t)(word)) << (64-(bits))))
+
+/* Define the SHA SIGMA and sigma macros */
+#define SHA512_SIGMA0(word) \
+ (SHA512_ROTR(28,word) ^ SHA512_ROTR(34,word) ^ SHA512_ROTR(39,word))
+#define SHA512_SIGMA1(word) \
+ (SHA512_ROTR(14,word) ^ SHA512_ROTR(18,word) ^ SHA512_ROTR(41,word))
+#define SHA512_sigma0(word) \
+ (SHA512_ROTR( 1,word) ^ SHA512_ROTR( 8,word) ^ SHA512_SHR( 7,word))
+#define SHA512_sigma1(word) \
+ (SHA512_ROTR(19,word) ^ SHA512_ROTR(61,word) ^ SHA512_SHR( 6,word))
+
+/*
+ * add "length" to the length
+ */
+static uint64_t addTemp;
+#define SHA384_512AddLength(context, length) \
+ (addTemp = context->Length_Low, context->Corrupted = \
+ ((context->Length_Low += length) < addTemp) && \
+ (++context->Length_High == 0) ? 1 : 0)
+
+/* Local Function Prototypes */
+static void SHA384_512Finalize(SHA512Context *context,
+ uint8_t Pad_Byte);
+static void SHA384_512PadMessage(SHA512Context *context,
+ uint8_t Pad_Byte);
+static void SHA384_512ProcessMessageBlock(SHA512Context *context);
+static int SHA384_512Reset(SHA512Context *context, uint64_t H0[]);
+static int SHA384_512ResultN(SHA512Context *context,
+ uint8_t Message_Digest[], int HashSize);
+
+/* Initial Hash Values: FIPS-180-2 sections 5.3.3 and 5.3.4 */
+static uint64_t SHA384_H0[] = {
+ 0xCBBB9D5DC1059ED8ll, 0x629A292A367CD507ll, 0x9159015A3070DD17ll,
+ 0x152FECD8F70E5939ll, 0x67332667FFC00B31ll, 0x8EB44A8768581511ll,
+ 0xDB0C2E0D64F98FA7ll, 0x47B5481DBEFA4FA4ll
+};
+static uint64_t SHA512_H0[] = {
+ 0x6A09E667F3BCC908ll, 0xBB67AE8584CAA73Bll, 0x3C6EF372FE94F82Bll,
+ 0xA54FF53A5F1D36F1ll, 0x510E527FADE682D1ll, 0x9B05688C2B3E6C1Fll,
+ 0x1F83D9ABFB41BD6Bll, 0x5BE0CD19137E2179ll
+};
+
+#endif /* USE_32BIT_ONLY */
+
+/*
+ * SHA384Reset
+ *
+ * Description:
+ * This function will initialize the SHA384Context in preparation
+ * for computing a new SHA384 message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA384Reset(SHA384Context *context)
+{
+ return SHA384_512Reset(context, SHA384_H0);
+}
+
+/*
+ * SHA384Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA384Input(SHA384Context *context,
+ const uint8_t *message_array, unsigned int length)
+{
+ return SHA512Input(context, message_array, length);
+}
+
+/*
+ * SHA384FinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA384FinalBits(SHA384Context *context,
+ const uint8_t message_bits, unsigned int length)
+{
+ return SHA512FinalBits(context, message_bits, length);
+}
+
+/*
+ * SHA384Result
+ *
+ * Description:
+ * This function will return the 384-bit message
+ * digest into the Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 48th element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA384Result(SHA384Context *context,
+ uint8_t Message_Digest[SHA384HashSize])
+{
+ return SHA384_512ResultN(context, Message_Digest, SHA384HashSize);
+}
+
+/*
+ * SHA512Reset
+ *
+ * Description:
+ * This function will initialize the SHA512Context in preparation
+ * for computing a new SHA512 message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA512Reset(SHA512Context *context)
+{
+ return SHA384_512Reset(context, SHA512_H0);
+}
+
+/*
+ * SHA512Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA512Input(SHA512Context *context,
+ const uint8_t *message_array,
+ unsigned int length)
+{
+ if (!length)
+ return shaSuccess;
+
+ if (!context || !message_array)
+ return shaNull;
+
+ if (context->Computed) {
+ context->Corrupted = shaStateError;
+ return shaStateError;
+ }
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ while (length-- && !context->Corrupted) {
+ context->Message_Block[context->Message_Block_Index++] =
+ (*message_array & 0xFF);
+
+ if (!SHA384_512AddLength(context, 8) &&
+ (context->Message_Block_Index == SHA512_Message_Block_Size))
+ SHA384_512ProcessMessageBlock(context);
+
+ message_array++;
+ }
+
+ return shaSuccess;
+}
+
+/*
+ * SHA512FinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA512FinalBits(SHA512Context *context,
+ const uint8_t message_bits, unsigned int length)
+{
+ uint8_t masks[8] = {
+ /* 0 0b00000000 */ 0x00, /* 1 0b10000000 */ 0x80,
+ /* 2 0b11000000 */ 0xC0, /* 3 0b11100000 */ 0xE0,
+ /* 4 0b11110000 */ 0xF0, /* 5 0b11111000 */ 0xF8,
+ /* 6 0b11111100 */ 0xFC, /* 7 0b11111110 */ 0xFE
+ };
+ uint8_t markbit[8] = {
+ /* 0 0b10000000 */ 0x80, /* 1 0b01000000 */ 0x40,
+ /* 2 0b00100000 */ 0x20, /* 3 0b00010000 */ 0x10,
+ /* 4 0b00001000 */ 0x08, /* 5 0b00000100 */ 0x04,
+ /* 6 0b00000010 */ 0x02, /* 7 0b00000001 */ 0x01
+ };
+
+ if (!length)
+ return shaSuccess;
+
+ if (!context)
+ return shaNull;
+
+ if ((context->Computed) || (length >= 8) || (length == 0)) {
+ context->Corrupted = shaStateError;
+ return shaStateError;
+ }
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ SHA384_512AddLength(context, length);
+ SHA384_512Finalize(context, (uint8_t)
+ ((message_bits & masks[length]) | markbit[length]));
+
+ return shaSuccess;
+}
+
+/*
+ * SHA384_512Finalize
+ *
+ * Description:
+ * This helper function finishes off the digest calculations.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * Pad_Byte: [in]
+ * The last byte to add to the digest before the 0-padding
+ * and length. This will contain the last bits of the message
+ * followed by another single bit. If the message was an
+ * exact multiple of 8-bits long, Pad_Byte will be 0x80.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+static void SHA384_512Finalize(SHA512Context *context,
+ uint8_t Pad_Byte)
+{
+ int_least16_t i;
+ SHA384_512PadMessage(context, Pad_Byte);
+ /* message may be sensitive, clear it out */
+ for (i = 0; i < SHA512_Message_Block_Size; ++i)
+ context->Message_Block[i] = 0;
+#ifdef USE_32BIT_ONLY /* and clear length */
+ context->Length[0] = context->Length[1] = 0;
+ context->Length[2] = context->Length[3] = 0;
+#else /* !USE_32BIT_ONLY */
+ context->Length_Low = 0;
+ context->Length_High = 0;
+#endif /* USE_32BIT_ONLY */
+ context->Computed = 1;
+}
+
+/*
+ * SHA512Result
+ *
+ * Description:
+ * This function will return the 512-bit message
+ * digest into the Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 64th element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int SHA512Result(SHA512Context *context,
+ uint8_t Message_Digest[SHA512HashSize])
+{
+ return SHA384_512ResultN(context, Message_Digest, SHA512HashSize);
+}
+
+/*
+ * SHA384_512PadMessage
+ *
+ * Description:
+ * According to the standard, the message must be padded to an
+ * even 1024 bits. The first padding bit must be a '1'. The
+ * last 128 bits represent the length of the original message.
+ * All bits in between should be 0. This helper function will
+ * pad the message according to those rules by filling the
+ * Message_Block array accordingly. When it returns, it can be
+ * assumed that the message digest has been computed.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to pad
+ * Pad_Byte: [in]
+ * The last byte to add to the digest before the 0-padding
+ * and length. This will contain the last bits of the message
+ * followed by another single bit. If the message was an
+ * exact multiple of 8-bits long, Pad_Byte will be 0x80.
+ *
+ * Returns:
+ * Nothing.
+ *
+ */
+static void SHA384_512PadMessage(SHA512Context *context,
+ uint8_t Pad_Byte)
+{
+ /*
+ * Check to see if the current message block is too small to hold
+ * the initial padding bits and length. If so, we will pad the
+ * block, process it, and then continue padding into a second
+ * block.
+ */
+ if (context->Message_Block_Index >= (SHA512_Message_Block_Size-16)) {
+ context->Message_Block[context->Message_Block_Index++] = Pad_Byte;
+ while (context->Message_Block_Index < SHA512_Message_Block_Size)
+ context->Message_Block[context->Message_Block_Index++] = 0;
+
+ SHA384_512ProcessMessageBlock(context);
+ } else
+ context->Message_Block[context->Message_Block_Index++] = Pad_Byte;
+
+ while (context->Message_Block_Index < (SHA512_Message_Block_Size-16))
+ context->Message_Block[context->Message_Block_Index++] = 0;
+
+ /*
+ * Store the message length as the last 16 octets
+ */
+#ifdef USE_32BIT_ONLY
+ context->Message_Block[112] = (uint8_t)(context->Length[0] >> 24);
+ context->Message_Block[113] = (uint8_t)(context->Length[0] >> 16);
+ context->Message_Block[114] = (uint8_t)(context->Length[0] >> 8);
+ context->Message_Block[115] = (uint8_t)(context->Length[0]);
+ context->Message_Block[116] = (uint8_t)(context->Length[1] >> 24);
+ context->Message_Block[117] = (uint8_t)(context->Length[1] >> 16);
+ context->Message_Block[118] = (uint8_t)(context->Length[1] >> 8);
+ context->Message_Block[119] = (uint8_t)(context->Length[1]);
+
+ context->Message_Block[120] = (uint8_t)(context->Length[2] >> 24);
+ context->Message_Block[121] = (uint8_t)(context->Length[2] >> 16);
+ context->Message_Block[122] = (uint8_t)(context->Length[2] >> 8);
+ context->Message_Block[123] = (uint8_t)(context->Length[2]);
+ context->Message_Block[124] = (uint8_t)(context->Length[3] >> 24);
+ context->Message_Block[125] = (uint8_t)(context->Length[3] >> 16);
+ context->Message_Block[126] = (uint8_t)(context->Length[3] >> 8);
+ context->Message_Block[127] = (uint8_t)(context->Length[3]);
+#else /* !USE_32BIT_ONLY */
+ context->Message_Block[112] = (uint8_t)(context->Length_High >> 56);
+ context->Message_Block[113] = (uint8_t)(context->Length_High >> 48);
+ context->Message_Block[114] = (uint8_t)(context->Length_High >> 40);
+ context->Message_Block[115] = (uint8_t)(context->Length_High >> 32);
+ context->Message_Block[116] = (uint8_t)(context->Length_High >> 24);
+ context->Message_Block[117] = (uint8_t)(context->Length_High >> 16);
+ context->Message_Block[118] = (uint8_t)(context->Length_High >> 8);
+ context->Message_Block[119] = (uint8_t)(context->Length_High);
+
+ context->Message_Block[120] = (uint8_t)(context->Length_Low >> 56);
+ context->Message_Block[121] = (uint8_t)(context->Length_Low >> 48);
+ context->Message_Block[122] = (uint8_t)(context->Length_Low >> 40);
+ context->Message_Block[123] = (uint8_t)(context->Length_Low >> 32);
+ context->Message_Block[124] = (uint8_t)(context->Length_Low >> 24);
+ context->Message_Block[125] = (uint8_t)(context->Length_Low >> 16);
+ context->Message_Block[126] = (uint8_t)(context->Length_Low >> 8);
+ context->Message_Block[127] = (uint8_t)(context->Length_Low);
+#endif /* USE_32BIT_ONLY */
+
+ SHA384_512ProcessMessageBlock(context);
+}
+
+/*
+ * SHA384_512ProcessMessageBlock
+ *
+ * Description:
+ * This helper function will process the next 1024 bits of the
+ * message stored in the Message_Block array.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ * Many of the variable names in this code, especially the
+ * single character names, were used because those were the
+ * names used in the publication.
+ *
+ *
+ */
+static void SHA384_512ProcessMessageBlock(SHA512Context *context)
+{
+ /* Constants defined in FIPS-180-2, section 4.2.3 */
+#ifdef USE_32BIT_ONLY
+ static const uint32_t K[80*2] = {
+ 0x428A2F98, 0xD728AE22, 0x71374491, 0x23EF65CD, 0xB5C0FBCF,
+ 0xEC4D3B2F, 0xE9B5DBA5, 0x8189DBBC, 0x3956C25B, 0xF348B538,
+ 0x59F111F1, 0xB605D019, 0x923F82A4, 0xAF194F9B, 0xAB1C5ED5,
+ 0xDA6D8118, 0xD807AA98, 0xA3030242, 0x12835B01, 0x45706FBE,
+ 0x243185BE, 0x4EE4B28C, 0x550C7DC3, 0xD5FFB4E2, 0x72BE5D74,
+ 0xF27B896F, 0x80DEB1FE, 0x3B1696B1, 0x9BDC06A7, 0x25C71235,
+ 0xC19BF174, 0xCF692694, 0xE49B69C1, 0x9EF14AD2, 0xEFBE4786,
+ 0x384F25E3, 0x0FC19DC6, 0x8B8CD5B5, 0x240CA1CC, 0x77AC9C65,
+ 0x2DE92C6F, 0x592B0275, 0x4A7484AA, 0x6EA6E483, 0x5CB0A9DC,
+ 0xBD41FBD4, 0x76F988DA, 0x831153B5, 0x983E5152, 0xEE66DFAB,
+ 0xA831C66D, 0x2DB43210, 0xB00327C8, 0x98FB213F, 0xBF597FC7,
+ 0xBEEF0EE4, 0xC6E00BF3, 0x3DA88FC2, 0xD5A79147, 0x930AA725,
+ 0x06CA6351, 0xE003826F, 0x14292967, 0x0A0E6E70, 0x27B70A85,
+ 0x46D22FFC, 0x2E1B2138, 0x5C26C926, 0x4D2C6DFC, 0x5AC42AED,
+ 0x53380D13, 0x9D95B3DF, 0x650A7354, 0x8BAF63DE, 0x766A0ABB,
+ 0x3C77B2A8, 0x81C2C92E, 0x47EDAEE6, 0x92722C85, 0x1482353B,
+ 0xA2BFE8A1, 0x4CF10364, 0xA81A664B, 0xBC423001, 0xC24B8B70,
+ 0xD0F89791, 0xC76C51A3, 0x0654BE30, 0xD192E819, 0xD6EF5218,
+ 0xD6990624, 0x5565A910, 0xF40E3585, 0x5771202A, 0x106AA070,
+ 0x32BBD1B8, 0x19A4C116, 0xB8D2D0C8, 0x1E376C08, 0x5141AB53,
+ 0x2748774C, 0xDF8EEB99, 0x34B0BCB5, 0xE19B48A8, 0x391C0CB3,
+ 0xC5C95A63, 0x4ED8AA4A, 0xE3418ACB, 0x5B9CCA4F, 0x7763E373,
+ 0x682E6FF3, 0xD6B2B8A3, 0x748F82EE, 0x5DEFB2FC, 0x78A5636F,
+ 0x43172F60, 0x84C87814, 0xA1F0AB72, 0x8CC70208, 0x1A6439EC,
+ 0x90BEFFFA, 0x23631E28, 0xA4506CEB, 0xDE82BDE9, 0xBEF9A3F7,
+ 0xB2C67915, 0xC67178F2, 0xE372532B, 0xCA273ECE, 0xEA26619C,
+ 0xD186B8C7, 0x21C0C207, 0xEADA7DD6, 0xCDE0EB1E, 0xF57D4F7F,
+ 0xEE6ED178, 0x06F067AA, 0x72176FBA, 0x0A637DC5, 0xA2C898A6,
+ 0x113F9804, 0xBEF90DAE, 0x1B710B35, 0x131C471B, 0x28DB77F5,
+ 0x23047D84, 0x32CAAB7B, 0x40C72493, 0x3C9EBE0A, 0x15C9BEBC,
+ 0x431D67C4, 0x9C100D4C, 0x4CC5D4BE, 0xCB3E42B6, 0x597F299C,
+ 0xFC657E2A, 0x5FCB6FAB, 0x3AD6FAEC, 0x6C44198C, 0x4A475817
+ };
+ int t, t2, t8; /* Loop counter */
+ uint32_t temp1[2], temp2[2], /* Temporary word values */
+ temp3[2], temp4[2], temp5[2];
+ uint32_t W[2*80]; /* Word sequence */
+ uint32_t A[2], B[2], C[2], D[2], /* Word buffers */
+ E[2], F[2], G[2], H[2];
+
+ /* Initialize the first 16 words in the array W */
+ for (t = t2 = t8 = 0; t < 16; t++, t8 += 8) {
+ W[t2++] = ((((uint32_t)context->Message_Block[t8 ])) << 24) |
+ ((((uint32_t)context->Message_Block[t8 + 1])) << 16) |
+ ((((uint32_t)context->Message_Block[t8 + 2])) << 8) |
+ ((((uint32_t)context->Message_Block[t8 + 3])));
+ W[t2++] = ((((uint32_t)context->Message_Block[t8 + 4])) << 24) |
+ ((((uint32_t)context->Message_Block[t8 + 5])) << 16) |
+ ((((uint32_t)context->Message_Block[t8 + 6])) << 8) |
+ ((((uint32_t)context->Message_Block[t8 + 7])));
+ }
+
+ for (t = 16; t < 80; t++, t2 += 2) {
+ /* W[t] = SHA512_sigma1(W[t-2]) + W[t-7] +
+ SHA512_sigma0(W[t-15]) + W[t-16]; */
+ uint32_t *Wt2 = &W[t2-2*2];
+ uint32_t *Wt7 = &W[t2-7*2];
+ uint32_t *Wt15 = &W[t2-15*2];
+ uint32_t *Wt16 = &W[t2-16*2];
+ SHA512_sigma1(Wt2, temp1);
+ SHA512_ADD(temp1, Wt7, temp2);
+ SHA512_sigma0(Wt15, temp1);
+ SHA512_ADD(temp1, Wt16, temp3);
+ SHA512_ADD(temp2, temp3, &W[t2]);
+ }
+
+ A[0] = context->Intermediate_Hash[0];
+ A[1] = context->Intermediate_Hash[1];
+ B[0] = context->Intermediate_Hash[2];
+ B[1] = context->Intermediate_Hash[3];
+ C[0] = context->Intermediate_Hash[4];
+ C[1] = context->Intermediate_Hash[5];
+ D[0] = context->Intermediate_Hash[6];
+ D[1] = context->Intermediate_Hash[7];
+ E[0] = context->Intermediate_Hash[8];
+ E[1] = context->Intermediate_Hash[9];
+ F[0] = context->Intermediate_Hash[10];
+ F[1] = context->Intermediate_Hash[11];
+ G[0] = context->Intermediate_Hash[12];
+ G[1] = context->Intermediate_Hash[13];
+ H[0] = context->Intermediate_Hash[14];
+ H[1] = context->Intermediate_Hash[15];
+
+ for (t = t2 = 0; t < 80; t++, t2 += 2) {
+ /*
+ * temp1 = H + SHA512_SIGMA1(E) + SHA_Ch(E,F,G) + K[t] + W[t];
+ */
+ SHA512_SIGMA1(E,temp1);
+ SHA512_ADD(H, temp1, temp2);
+ SHA_Ch(E,F,G,temp3);
+ SHA512_ADD(temp2, temp3, temp4);
+ SHA512_ADD(&K[t2], &W[t2], temp5);
+ SHA512_ADD(temp4, temp5, temp1);
+ /*
+ * temp2 = SHA512_SIGMA0(A) + SHA_Maj(A,B,C);
+ */
+ SHA512_SIGMA0(A,temp3);
+ SHA_Maj(A,B,C,temp4);
+ SHA512_ADD(temp3, temp4, temp2);
+ H[0] = G[0]; H[1] = G[1];
+ G[0] = F[0]; G[1] = F[1];
+ F[0] = E[0]; F[1] = E[1];
+ SHA512_ADD(D, temp1, E);
+ D[0] = C[0]; D[1] = C[1];
+ C[0] = B[0]; C[1] = B[1];
+ B[0] = A[0]; B[1] = A[1];
+ SHA512_ADD(temp1, temp2, A);
+ }
+
+ SHA512_ADDTO2(&context->Intermediate_Hash[0], A);
+ SHA512_ADDTO2(&context->Intermediate_Hash[2], B);
+ SHA512_ADDTO2(&context->Intermediate_Hash[4], C);
+ SHA512_ADDTO2(&context->Intermediate_Hash[6], D);
+ SHA512_ADDTO2(&context->Intermediate_Hash[8], E);
+ SHA512_ADDTO2(&context->Intermediate_Hash[10], F);
+ SHA512_ADDTO2(&context->Intermediate_Hash[12], G);
+ SHA512_ADDTO2(&context->Intermediate_Hash[14], H);
+
+#else /* !USE_32BIT_ONLY */
+ static const uint64_t K[80] = {
+ 0x428A2F98D728AE22ll, 0x7137449123EF65CDll, 0xB5C0FBCFEC4D3B2Fll,
+ 0xE9B5DBA58189DBBCll, 0x3956C25BF348B538ll, 0x59F111F1B605D019ll,
+ 0x923F82A4AF194F9Bll, 0xAB1C5ED5DA6D8118ll, 0xD807AA98A3030242ll,
+ 0x12835B0145706FBEll, 0x243185BE4EE4B28Cll, 0x550C7DC3D5FFB4E2ll,
+ 0x72BE5D74F27B896Fll, 0x80DEB1FE3B1696B1ll, 0x9BDC06A725C71235ll,
+ 0xC19BF174CF692694ll, 0xE49B69C19EF14AD2ll, 0xEFBE4786384F25E3ll,
+ 0x0FC19DC68B8CD5B5ll, 0x240CA1CC77AC9C65ll, 0x2DE92C6F592B0275ll,
+ 0x4A7484AA6EA6E483ll, 0x5CB0A9DCBD41FBD4ll, 0x76F988DA831153B5ll,
+ 0x983E5152EE66DFABll, 0xA831C66D2DB43210ll, 0xB00327C898FB213Fll,
+ 0xBF597FC7BEEF0EE4ll, 0xC6E00BF33DA88FC2ll, 0xD5A79147930AA725ll,
+ 0x06CA6351E003826Fll, 0x142929670A0E6E70ll, 0x27B70A8546D22FFCll,
+ 0x2E1B21385C26C926ll, 0x4D2C6DFC5AC42AEDll, 0x53380D139D95B3DFll,
+ 0x650A73548BAF63DEll, 0x766A0ABB3C77B2A8ll, 0x81C2C92E47EDAEE6ll,
+ 0x92722C851482353Bll, 0xA2BFE8A14CF10364ll, 0xA81A664BBC423001ll,
+ 0xC24B8B70D0F89791ll, 0xC76C51A30654BE30ll, 0xD192E819D6EF5218ll,
+ 0xD69906245565A910ll, 0xF40E35855771202All, 0x106AA07032BBD1B8ll,
+ 0x19A4C116B8D2D0C8ll, 0x1E376C085141AB53ll, 0x2748774CDF8EEB99ll,
+ 0x34B0BCB5E19B48A8ll, 0x391C0CB3C5C95A63ll, 0x4ED8AA4AE3418ACBll,
+ 0x5B9CCA4F7763E373ll, 0x682E6FF3D6B2B8A3ll, 0x748F82EE5DEFB2FCll,
+ 0x78A5636F43172F60ll, 0x84C87814A1F0AB72ll, 0x8CC702081A6439ECll,
+ 0x90BEFFFA23631E28ll, 0xA4506CEBDE82BDE9ll, 0xBEF9A3F7B2C67915ll,
+ 0xC67178F2E372532Bll, 0xCA273ECEEA26619Cll, 0xD186B8C721C0C207ll,
+ 0xEADA7DD6CDE0EB1Ell, 0xF57D4F7FEE6ED178ll, 0x06F067AA72176FBAll,
+ 0x0A637DC5A2C898A6ll, 0x113F9804BEF90DAEll, 0x1B710B35131C471Bll,
+ 0x28DB77F523047D84ll, 0x32CAAB7B40C72493ll, 0x3C9EBE0A15C9BEBCll,
+ 0x431D67C49C100D4Cll, 0x4CC5D4BECB3E42B6ll, 0x597F299CFC657E2All,
+ 0x5FCB6FAB3AD6FAECll, 0x6C44198C4A475817ll
+ };
+ int t, t8; /* Loop counter */
+ uint64_t temp1, temp2; /* Temporary word value */
+ uint64_t W[80]; /* Word sequence */
+ uint64_t A, B, C, D, E, F, G, H; /* Word buffers */
+
+ /*
+ * Initialize the first 16 words in the array W
+ */
+ for (t = t8 = 0; t < 16; t++, t8 += 8)
+ W[t] = ((uint64_t)(context->Message_Block[t8 ]) << 56) |
+ ((uint64_t)(context->Message_Block[t8 + 1]) << 48) |
+ ((uint64_t)(context->Message_Block[t8 + 2]) << 40) |
+ ((uint64_t)(context->Message_Block[t8 + 3]) << 32) |
+ ((uint64_t)(context->Message_Block[t8 + 4]) << 24) |
+ ((uint64_t)(context->Message_Block[t8 + 5]) << 16) |
+ ((uint64_t)(context->Message_Block[t8 + 6]) << 8) |
+ ((uint64_t)(context->Message_Block[t8 + 7]));
+
+ for (t = 16; t < 80; t++)
+ W[t] = SHA512_sigma1(W[t-2]) + W[t-7] +
+ SHA512_sigma0(W[t-15]) + W[t-16];
+
+ A = context->Intermediate_Hash[0];
+ B = context->Intermediate_Hash[1];
+ C = context->Intermediate_Hash[2];
+ D = context->Intermediate_Hash[3];
+ E = context->Intermediate_Hash[4];
+ F = context->Intermediate_Hash[5];
+ G = context->Intermediate_Hash[6];
+ H = context->Intermediate_Hash[7];
+
+ for (t = 0; t < 80; t++) {
+ temp1 = H + SHA512_SIGMA1(E) + SHA_Ch(E,F,G) + K[t] + W[t];
+ temp2 = SHA512_SIGMA0(A) + SHA_Maj(A,B,C);
+ H = G;
+ G = F;
+ F = E;
+ E = D + temp1;
+ D = C;
+ C = B;
+ B = A;
+ A = temp1 + temp2;
+ }
+
+ context->Intermediate_Hash[0] += A;
+ context->Intermediate_Hash[1] += B;
+ context->Intermediate_Hash[2] += C;
+ context->Intermediate_Hash[3] += D;
+ context->Intermediate_Hash[4] += E;
+ context->Intermediate_Hash[5] += F;
+ context->Intermediate_Hash[6] += G;
+ context->Intermediate_Hash[7] += H;
+#endif /* USE_32BIT_ONLY */
+
+ context->Message_Block_Index = 0;
+}
+
+/*
+ * SHA384_512Reset
+ *
+ * Description:
+ * This helper function will initialize the SHA512Context in
+ * preparation for computing a new SHA384 or SHA512 message
+ * digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ * H0
+ * The initial hash value to use.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+#ifdef USE_32BIT_ONLY
+static int SHA384_512Reset(SHA512Context *context, uint32_t H0[])
+#else /* !USE_32BIT_ONLY */
+static int SHA384_512Reset(SHA512Context *context, uint64_t H0[])
+#endif /* USE_32BIT_ONLY */
+{
+ int i;
+ if (!context)
+ return shaNull;
+
+ context->Message_Block_Index = 0;
+
+#ifdef USE_32BIT_ONLY
+ context->Length[0] = context->Length[1] = 0;
+ context->Length[2] = context->Length[3] = 0;
+
+ for (i = 0; i < SHA512HashSize/4; i++)
+ context->Intermediate_Hash[i] = H0[i];
+#else /* !USE_32BIT_ONLY */
+ context->Length_High = context->Length_Low = 0;
+
+ for (i = 0; i < SHA512HashSize/8; i++)
+ context->Intermediate_Hash[i] = H0[i];
+#endif /* USE_32BIT_ONLY */
+
+ context->Computed = 0;
+ context->Corrupted = 0;
+
+ return shaSuccess;
+}
+
+/*
+ * SHA384_512ResultN
+ *
+ * Description:
+ * This helper function will return the 384-bit or 512-bit message
+ * digest into the Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 48th/64th element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ * HashSize: [in]
+ * The size of the hash, either 48 or 64.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+static int SHA384_512ResultN(SHA512Context *context,
+ uint8_t Message_Digest[], int HashSize)
+{
+ int i;
+
+#ifdef USE_32BIT_ONLY
+ int i2;
+#endif /* USE_32BIT_ONLY */
+
+ if (!context || !Message_Digest)
+ return shaNull;
+
+ if (context->Corrupted)
+ return context->Corrupted;
+
+ if (!context->Computed)
+ SHA384_512Finalize(context, 0x80);
+
+#ifdef USE_32BIT_ONLY
+ for (i = i2 = 0; i < HashSize; ) {
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2]>>24);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2]>>16);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2]>>8);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2++]);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2]>>24);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2]>>16);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2]>>8);
+ Message_Digest[i++]=(uint8_t)(context->Intermediate_Hash[i2++]);
+ }
+#else /* !USE_32BIT_ONLY */
+ for (i = 0; i < HashSize; ++i)
+ Message_Digest[i] = (uint8_t)
+ (context->Intermediate_Hash[i>>3] >> 8 * ( 7 - ( i % 8 ) ));
+#endif /* USE_32BIT_ONLY */
+
+ return shaSuccess;
+}
--- /dev/null
+/**************************** usha.c ****************************/
+/******************** See RFC 4634 for details ******************/
+/*
+ * Description:
+ * This file implements a unified interface to the SHA algorithms.
+ */
+
+#include "sha.h"
+
+/*
+ * USHAReset
+ *
+ * Description:
+ * This function will initialize the SHA Context in preparation
+ * for computing a new SHA message digest.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to reset.
+ * whichSha: [in]
+ * Selects which SHA reset to call
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int USHAReset(USHAContext *ctx, enum SHAversion whichSha)
+{
+ if (ctx) {
+ ctx->whichSha = whichSha;
+ switch (whichSha) {
+ case SHA1: return SHA1Reset((SHA1Context*)&ctx->ctx);
+ case SHA224: return SHA224Reset((SHA224Context*)&ctx->ctx);
+ case SHA256: return SHA256Reset((SHA256Context*)&ctx->ctx);
+ case SHA384: return SHA384Reset((SHA384Context*)&ctx->ctx);
+ case SHA512: return SHA512Reset((SHA512Context*)&ctx->ctx);
+ default: return shaBadParam;
+ }
+ } else {
+ return shaNull;
+ }
+}
+
+/*
+ * USHAInput
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion
+ * of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_array: [in]
+ * An array of characters representing the next portion of
+ * the message.
+ * length: [in]
+ * The length of the message in message_array
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int USHAInput(USHAContext *ctx,
+ const uint8_t *bytes, unsigned int bytecount)
+{
+ if (ctx) {
+ switch (ctx->whichSha) {
+ case SHA1:
+ return SHA1Input((SHA1Context*)&ctx->ctx, bytes, bytecount);
+ case SHA224:
+ return SHA224Input((SHA224Context*)&ctx->ctx, bytes,
+ bytecount);
+ case SHA256:
+ return SHA256Input((SHA256Context*)&ctx->ctx, bytes,
+ bytecount);
+ case SHA384:
+ return SHA384Input((SHA384Context*)&ctx->ctx, bytes,
+ bytecount);
+ case SHA512:
+ return SHA512Input((SHA512Context*)&ctx->ctx, bytes,
+ bytecount);
+ default: return shaBadParam;
+ }
+ } else {
+ return shaNull;
+ }
+}
+/*
+ * USHAFinalBits
+ *
+ * Description:
+ * This function will add in any final bits of the message.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The SHA context to update
+ * message_bits: [in]
+ * The final bits of the message, in the upper portion of the
+ * byte. (Use 0b###00000 instead of 0b00000### to input the
+ * three bits ###.)
+ * length: [in]
+ * The number of bits in message_bits, between 1 and 7.
+ *
+ * Returns:
+ * sha Error Code.
+ */
+int USHAFinalBits(USHAContext *ctx,
+ const uint8_t bits, unsigned int bitcount)
+{
+ if (ctx) {
+ switch (ctx->whichSha) {
+ case SHA1:
+ return SHA1FinalBits((SHA1Context*)&ctx->ctx, bits, bitcount);
+ case SHA224:
+ return SHA224FinalBits((SHA224Context*)&ctx->ctx, bits,
+ bitcount);
+ case SHA256:
+ return SHA256FinalBits((SHA256Context*)&ctx->ctx, bits,
+ bitcount);
+ case SHA384:
+ return SHA384FinalBits((SHA384Context*)&ctx->ctx, bits,
+ bitcount);
+ case SHA512:
+ return SHA512FinalBits((SHA512Context*)&ctx->ctx, bits,
+ bitcount);
+ default: return shaBadParam;
+ }
+ } else {
+ return shaNull;
+ }
+}
+
+/*
+ * USHAResult
+ *
+ * Description:
+ * This function will return the 160-bit message digest into the
+ * Message_Digest array provided by the caller.
+ * NOTE: The first octet of hash is stored in the 0th element,
+ * the last octet of hash in the 19th element.
+ *
+ * Parameters:
+ * context: [in/out]
+ * The context to use to calculate the SHA-1 hash.
+ * Message_Digest: [out]
+ * Where the digest is returned.
+ *
+ * Returns:
+ * sha Error Code.
+ *
+ */
+int USHAResult(USHAContext *ctx,
+ uint8_t Message_Digest[USHAMaxHashSize])
+{
+ if (ctx) {
+ switch (ctx->whichSha) {
+ case SHA1:
+ return SHA1Result((SHA1Context*)&ctx->ctx, Message_Digest);
+ case SHA224:
+ return SHA224Result((SHA224Context*)&ctx->ctx, Message_Digest);
+ case SHA256:
+ return SHA256Result((SHA256Context*)&ctx->ctx, Message_Digest);
+ case SHA384:
+ return SHA384Result((SHA384Context*)&ctx->ctx, Message_Digest);
+ case SHA512:
+ return SHA512Result((SHA512Context*)&ctx->ctx, Message_Digest);
+ default: return shaBadParam;
+ }
+ } else {
+ return shaNull;
+ }
+}
+
+/*
+ * USHABlockSize
+ *
+ * Description:
+ * This function will return the blocksize for the given SHA
+ * algorithm.
+ *
+ * Parameters:
+ * whichSha:
+ * which SHA algorithm to query
+ *
+ * Returns:
+ * block size
+ *
+ */
+int USHABlockSize(enum SHAversion whichSha)
+{
+ switch (whichSha) {
+ case SHA1: return SHA1_Message_Block_Size;
+ case SHA224: return SHA224_Message_Block_Size;
+ case SHA256: return SHA256_Message_Block_Size;
+ case SHA384: return SHA384_Message_Block_Size;
+ default:
+ case SHA512: return SHA512_Message_Block_Size;
+ }
+}
+
+/*
+ * USHAHashSize
+ *
+ * Description:
+ * This function will return the hashsize for the given SHA
+ * algorithm.
+ *
+ * Parameters:
+ * whichSha:
+ * which SHA algorithm to query
+ *
+ * Returns:
+ * hash size
+ *
+ */
+int USHAHashSize(enum SHAversion whichSha)
+{
+ switch (whichSha) {
+ case SHA1: return SHA1HashSize;
+ case SHA224: return SHA224HashSize;
+ case SHA256: return SHA256HashSize;
+ case SHA384: return SHA384HashSize;
+ default:
+ case SHA512: return SHA512HashSize;
+ }
+}
+
+/*
+ * USHAHashSizeBits
+ *
+ * Description:
+ * This function will return the hashsize for the given SHA
+ * algorithm, expressed in bits.
+ *
+ * Parameters:
+ * whichSha:
+ * which SHA algorithm to query
+ *
+ * Returns:
+ * hash size in bits
+ *
+ */
+int USHAHashSizeBits(enum SHAversion whichSha)
+{
+ switch (whichSha) {
+ case SHA1: return SHA1HashSizeBits;
+ case SHA224: return SHA224HashSizeBits;
+ case SHA256: return SHA256HashSizeBits;
+ case SHA384: return SHA384HashSizeBits;
+ default:
+ case SHA512: return SHA512HashSizeBits;
+ }
+}
+
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