Ivan Grokhotkov / hmac_md5

A simple CyaSSL-based HMAC-MD5 implementation. Licensed under GPL v2.

Dependents:   RFrec_full RFtrans_full

The output will be base64-encoded, with trailing "==", like this:

j62o/jZsAZD9i9m+32lIuQ==

Example

#include "mbed.h"
#include "hmac_md5.h"

Serial pc(USBTX, USBRX); // tx, rx

void main(void)
{
    
    const char * key = "MySecretKey";
    
    const char * text = "message to be signed";
    
    char output[26];
    
    HMAC_MD5(key, text, output);

    printf("result = %s\n", output);

    while(true){}
}

Diff: hmac.h

Revision:
0:83f3dcfa5c8f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hmac.h	Wed Feb 06 20:35:03 2013 +0000
@@ -0,0 +1,141 @@
+/* hmac.h
+ *
+ * Copyright (C) 2006-2012 Sawtooth Consulting Ltd.
+ *
+ * This file is part of CyaSSL.
+ *
+ * CyaSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * CyaSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+#ifndef NO_HMAC
+
+#ifndef CTAO_CRYPT_HMAC_H
+#define CTAO_CRYPT_HMAC_H
+
+#define NO_SHA256
+#define NO_SHA
+
+#ifndef NO_MD5
+    #include "md5.h"
+#endif
+
+#ifndef NO_SHA
+#include <cyassl/ctaocrypt/sha.h>
+#endif
+
+
+#ifndef NO_SHA256
+    #include <cyassl/ctaocrypt/sha256.h>
+#endif
+
+#ifdef CYASSL_SHA384
+    #include <cyassl/ctaocrypt/sha512.h>
+#endif
+
+#ifdef HAVE_CAVIUM
+    #include <cyassl/ctaocrypt/logging.h>
+    #include "cavium_common.h"
+#endif
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+
+#define CYASSL_HMAC_CAVIUM_MAGIC 0xBEEF0005
+
+enum {
+    IPAD    = 0x36,
+    OPAD    = 0x5C,
+#ifdef NO_MD5
+    MD5     = 0,
+#endif
+#if defined(CYASSL_SHA384)
+    INNER_HASH_SIZE = SHA384_DIGEST_SIZE,
+    HMAC_BLOCK_SIZE = SHA384_BLOCK_SIZE
+#elif !defined(NO_SHA256)
+    INNER_HASH_SIZE = SHA256_DIGEST_SIZE,
+    HMAC_BLOCK_SIZE = SHA256_BLOCK_SIZE,
+    SHA384          = 5
+#elif !defined(NO_SHA)
+    INNER_HASH_SIZE = SHA_DIGEST_SIZE,
+    HMAC_BLOCK_SIZE = SHA_BLOCK_SIZE,
+    SHA256          = 2,                     /* hash type unique */
+    SHA384          = 5
+#else
+    INNER_HASH_SIZE = MD5_DIGEST_SIZE,
+    HMAC_BLOCK_SIZE = MD5_BLOCK_SIZE,
+    SHA                = 1,
+    SHA256          = 2,                     /* hash type unique */
+    SHA384          = 5
+#endif
+};
+
+
+/* hash union */
+typedef union {
+    #ifndef NO_MD5
+        Md5 md5;
+    #endif
+    #ifndef NO_SHA
+    Sha sha;
+    #endif
+    #ifndef NO_SHA256
+        Sha256 sha256;
+    #endif
+    #ifdef CYASSL_SHA384
+        Sha384 sha384;
+    #endif
+} Hash;
+
+/* Hmac digest */
+typedef struct Hmac {
+    Hash    hash;
+    word32  ipad[HMAC_BLOCK_SIZE  / sizeof(word32)];  /* same block size all*/
+    word32  opad[HMAC_BLOCK_SIZE  / sizeof(word32)];
+    word32  innerHash[INNER_HASH_SIZE / sizeof(word32)]; /* max size */
+    byte    macType;                                     /* md5 sha or sha256 */
+    byte    innerHashKeyed;                              /* keyed flag */
+#ifdef HAVE_CAVIUM
+    word16   keyLen;          /* hmac key length */
+    word16   dataLen;
+    HashType type;            /* hmac key type */
+    int      devId;           /* nitrox device id */
+    word32   magic;           /* using cavium magic */
+    word64   contextHandle;   /* nitrox context memory handle */
+    byte*    data;            /* buffered input data for one call */
+#endif
+} Hmac;
+
+
+/* does init */
+CYASSL_API void HmacSetKey(Hmac*, int type, const byte* key, word32 keySz);
+CYASSL_API void HmacUpdate(Hmac*, const byte*, word32);
+CYASSL_API void HmacFinal(Hmac*, byte*);
+
+#ifdef HAVE_CAVIUM
+    CYASSL_API int  HmacInitCavium(Hmac*, int);
+    CYASSL_API void HmacFreeCavium(Hmac*);
+#endif
+
+
+#ifdef __cplusplus
+    } /* extern "C" */
+#endif
+
+#endif /* CTAO_CRYPT_HMAC_H */
+
+#endif /* NO_HMAC */