Added ykp_AES_key_from_hex and ykpersonalize -a parameter.

From Lester Hightower, 10East" <lester.hightower@gmail.com>.

git-svn-id: https://yubikey-personalization.googlecode.com/svn/trunk@50 b62f149e-849f-11dd-9899-c7ba65f7c4c7

diff --git a/AUTHORS b/AUTHORS
index f2561562323b0fb09e512c163e5145f9c4eaa149..91fbab4c80f2cca9bc2f6d8ad2091464db19d162 100644 (file)
--- a/AUTHORS
+++ b/AUTHORS
@@ -8,3 +8,9 @@ Common files (the common subdirectory)
 --------------------------------------
 
 Jakob Ehrensvärd <jakob@yubico.com>
+
+Patches
+-------
+
+Lester Hightower, 10East" <lester.hightower@gmail.com>
+Added ykp_AES_key_from_hex and ykpersonalize -a parameter.
\ No newline at end of file

diff --git a/NEWS b/NEWS
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0763d39cf0e1d60b6a66977e7031c7b5581c5135 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -0,0 +1,5 @@
+Yubikey-personalize NEWS -- History of user-visible changes.     -*- outline -*-
+
+* Version 1.0 (unreleased)
+
+** Initial release.

diff --git a/ykpers.c b/ykpers.c
index 7a23f46ab05b7c698a6d527aa7ae5b52b32391dd..abaccc7903cc08f18dcfca4be637a969ea96a3cf 100644 (file)
--- a/ykpers.c
+++ b/ykpers.c
@@ -1,6 +1,6 @@
 /* -*- mode:C; c-file-style: "bsd" -*- */
 /*
- * Copyright (c) 2008, Yubico AB
+ * Copyright (c) 2008, 2009, Yubico AB
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -69,6 +69,64 @@ int ykp_free_config(CONFIG *cfg)
        return 0;
 }
 
+static int hex_to_binary(const char *data, char *dest)
+{
+       char value;
+       int desti=0;
+       char hexstr[3]="xx";
+
+/* We only allow an even number of hex digits (full bytes) */
+       if (strlen(data) % 2) {
+               return 0;
+       }
+
+/* Convert the hex to binary. */
+       while (*data != '\0' && hexstr[1] != '\0') {
+               int i;
+               for (i=0; i<2; i++) {
+                       char c;  c=tolower(*data);
+                       hexstr[i]=c;
+                       data++;
+/* In ASCII, 0-9 == 48-57 and a-f == 97-102. */
+                       if ( (c<48||(c>57 && c<97)||c>102) && (i!=0 && c!='\0') ) {
+                               return 0; /* Not a valid hex digit */
+                       }
+               }
+               dest[desti] = (char)strtol(hexstr, NULL, 16);
+               desti+=sizeof(char);
+       }
+
+/* Tack a NULL on the end then return the number of bytes
+   in the converted binary _minus_ the NULL. */
+       dest[desti] = '\0';
+       return desti;
+}
+
+int ykp_AES_key_from_hex(CONFIG *cfg, const char *hexkey) {
+       char aesbin[256];
+       unsigned long int aeslong;
+
+/* Make sure that the hexkey is exactly 32 characters */
+       if (strlen(hexkey) != 32) {
+               return 1;  /* Bad AES key */
+       }
+
+/* Make sure that the hexkey is made up of only [0-9a-f] */
+       int i;
+       for (i=0; i < strlen(hexkey); i++) {
+               char c = tolower(hexkey[i]);
+/* In ASCII, 0-9 == 48-57 and a-f == 97-102 */
+               if ( c<48 || (c>57 && c<97) || c>102 ) {
+                       return 1;
+               }
+       }
+
+       hex_to_binary(hexkey, aesbin);
+       memcpy(cfg->key, aesbin, sizeof(cfg->key));
+
+       return 0;
+}
+
 int ykp_AES_key_from_passphrase(CONFIG *cfg, const char *passphrase,
                                const char *salt)
 {

diff --git a/ykpers.h b/ykpers.h
index ff8e1df0405acb75593514e12d62e416df5695a9..058c65573ff63f6fd0317108d33a2aede75d5544 100644 (file)
--- a/ykpers.h
+++ b/ykpers.h
@@ -1,6 +1,6 @@
 /* -*- mode:C; c-file-style: "bsd" -*- */
 /*
- * Copyright (c) 2008, Yubico AB
+ * Copyright (c) 2008, 2009, Yubico AB
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,6 +36,7 @@
 CONFIG *ykp_create_config(void);
 int ykp_free_config(CONFIG *cfg);
 
+int ykp_AES_key_from_hex(CONFIG *cfg, const char *hexkey);
 int ykp_AES_key_from_passphrase(CONFIG *cfg, const char *passphrase,
                                const char *salt);
 int ykp_set_access_code(CONFIG *cfg, unsigned char *access_code);

diff --git a/ykpersonalize.c b/ykpersonalize.c
index 7e97db2ad7a183e2e72f812280f813b7962536fe..1aa4b1a138e24d6b830ae5885e458842c70e037e 100644 (file)
--- a/ykpersonalize.c
+++ b/ykpersonalize.c
@@ -1,6 +1,6 @@
 /* -*- mode:C; c-file-style: "bsd" -*- */
 /*
- * Copyright (c) 2008, Yubico AB
+ * Copyright (c) 2008, 2009, Yubico AB
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,6 +44,7 @@ const char *usage =
 "          (if file is -, send to stdout)\n"
 "-ifile    read configuration from file.\n"
 "          (if file is -, read from stdin)\n"
+"-aaeshex  A 32 char hex value (not modhex) of a fixed AES key to use\n"
 "-ooption  change configuration option.  Possible option arguments are:\n"
 "          salt=ssssssss       Salt to be used for key generation.  If\n"
 "                              none is given, a unique random one will be\n"
@@ -68,7 +69,7 @@ const char *usage =
 "-v        verbose\n"
 "-h        help (this text)\n"
 ;
-const char *optstring = "hi:o:s:v";
+const char *optstring = "a:hi:o:s:v";
 
 static int reader(char *buf, size_t count, void *stream)
 {
@@ -101,6 +102,7 @@ main(int argc, char **argv)
        FILE *inf = NULL; const char *infname = NULL;
        FILE *outf = NULL; const char *outfname = NULL;
        bool verbose = false;
+       bool aesviahash = false; const char *aeshash = NULL;
        YUBIKEY *yk = NULL;
        CONFIG *cfg = ykp_create_config();
        STATUS *st = ykds_alloc();
@@ -124,6 +126,10 @@ main(int argc, char **argv)
                case 's':
                        outfname = optarg;
                        break;
+               case 'a':
+                       aesviahash = true;
+                       aeshash = optarg;
+                       break;
                case 'o':
                        if (strncmp(optarg, "salt=", 5) == 0)
                                salt = strdup(optarg+5);
@@ -238,6 +244,12 @@ main(int argc, char **argv)
                if (inf) {
                        if (!ykp_read_config(cfg, reader, inf))
                                break;
+               } else if (aesviahash) {
+                       if (ykp_AES_key_from_hex(cfg, aeshash)) {
+                               fprintf(stderr, "Bad AES key: %s\n", aeshash);
+                               fflush(stderr);
+                               break;
+                       }
                } else {
                        char passphrasebuf[256]; size_t passphraselen;
                        fprintf(stderr, "Passphrase to create AES key: ");