X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fcipher.c;h=3df47f93c9db01e0a19da8af237ab800ae9d34b1;hb=2de93fbf3c427df010b5a923c302e20c143d60cf;hp=85eb12f8e564ef838cc7d065c485e2688e55aff2;hpb=95477377995aefa2ec1654a9a3777bd57ea99146;p=linux-2.6

diff --git a/crypto/cipher.c b/crypto/cipher.c
index 85eb12f8e5..3df47f93c9 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -41,7 +41,7 @@ static unsigned int crypt_slow(const struct cipher_desc *desc,
 			       struct scatter_walk *in,
 			       struct scatter_walk *out, unsigned int bsize)
 {
-	unsigned int alignmask = desc->tfm->__crt_alg->cra_alignmask;
+	unsigned long alignmask = crypto_tfm_alg_alignmask(desc->tfm);
 	u8 buffer[bsize * 2 + alignmask];
 	u8 *src = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
 	u8 *dst = src + bsize;
@@ -98,7 +98,7 @@ static int crypt(const struct cipher_desc *desc,
 	struct scatter_walk walk_in, walk_out;
 	struct crypto_tfm *tfm = desc->tfm;
 	const unsigned int bsize = crypto_tfm_alg_blocksize(tfm);
-	unsigned int alignmask = tfm->__crt_alg->cra_alignmask;
+	unsigned int alignmask = crypto_tfm_alg_alignmask(tfm);
 	unsigned long buffer = 0;
 
 	if (!nbytes)
@@ -154,6 +154,31 @@ static int crypt(const struct cipher_desc *desc,
 	return 0;
 }
 
+static int crypt_iv_unaligned(struct cipher_desc *desc,
+			      struct scatterlist *dst,
+			      struct scatterlist *src,
+			      unsigned int nbytes)
+{
+	struct crypto_tfm *tfm = desc->tfm;
+	unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
+	u8 *iv = desc->info;
+
+	if (unlikely(((unsigned long)iv & alignmask))) {
+		unsigned int ivsize = tfm->crt_cipher.cit_ivsize;
+		u8 buffer[ivsize + alignmask];
+		u8 *tmp = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
+		int err;
+
+		desc->info = memcpy(tmp, iv, ivsize);
+		err = crypt(desc, dst, src, nbytes);
+		memcpy(iv, tmp, ivsize);
+
+		return err;
+	}
+
+	return crypt(desc, dst, src, nbytes);
+}
+
 static unsigned int cbc_process_encrypt(const struct cipher_desc *desc,
 					u8 *dst, const u8 *src,
 					unsigned int nbytes)
@@ -298,7 +323,7 @@ static int cbc_encrypt_iv(struct crypto_tfm *tfm,
 	desc.prfn = cipher->cia_encrypt_cbc ?: cbc_process_encrypt;
 	desc.info = iv;
 
-	return crypt(&desc, dst, src, nbytes);
+	return crypt_iv_unaligned(&desc, dst, src, nbytes);
 }
 
 static int cbc_decrypt(struct crypto_tfm *tfm,
@@ -330,7 +355,7 @@ static int cbc_decrypt_iv(struct crypto_tfm *tfm,
 	desc.prfn = cipher->cia_decrypt_cbc ?: cbc_process_decrypt;
 	desc.info = iv;
 
-	return crypt(&desc, dst, src, nbytes);
+	return crypt_iv_unaligned(&desc, dst, src, nbytes);
 }
 
 static int nocrypt(struct crypto_tfm *tfm,
@@ -352,11 +377,7 @@ static int nocrypt_iv(struct crypto_tfm *tfm,
 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags)
 {
 	u32 mode = flags & CRYPTO_TFM_MODE_MASK;
-	
 	tfm->crt_cipher.cit_mode = mode ? mode : CRYPTO_TFM_MODE_ECB;
-	if (flags & CRYPTO_TFM_REQ_WEAK_KEY)
-		tfm->crt_flags = CRYPTO_TFM_REQ_WEAK_KEY;
-	
 	return 0;
 }
 
@@ -399,6 +420,8 @@ int crypto_init_cipher_ops(struct crypto_tfm *tfm)
 	}
 	
 	if (ops->cit_mode == CRYPTO_TFM_MODE_CBC) {
+		unsigned long align;
+		unsigned long addr;
 	    	
 	    	switch (crypto_tfm_alg_blocksize(tfm)) {
 	    	case 8:
@@ -418,9 +441,11 @@ int crypto_init_cipher_ops(struct crypto_tfm *tfm)
 	    	}
 	    	
 		ops->cit_ivsize = crypto_tfm_alg_blocksize(tfm);
-	    	ops->cit_iv = kmalloc(ops->cit_ivsize, GFP_KERNEL);
-		if (ops->cit_iv == NULL)
-			ret = -ENOMEM;
+		align = crypto_tfm_alg_alignmask(tfm) + 1;
+		addr = (unsigned long)crypto_tfm_ctx(tfm);
+		addr = ALIGN(addr, align);
+		addr += ALIGN(tfm->__crt_alg->cra_ctxsize, align);
+		ops->cit_iv = (void *)addr;
 	}
 
 out:	
@@ -429,5 +454,4 @@ out:
 
 void crypto_exit_cipher_ops(struct crypto_tfm *tfm)
 {
-	kfree(tfm->crt_cipher.cit_iv);
 }