507 lines
17 KiB
C
507 lines
17 KiB
C
/* Submited by Dobes Vandermeer (dobes@smartt.com) */
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#include "mycrypt.h"
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/*
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(1) append zeros to the end of K to create a B byte string
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(e.g., if K is of length 20 bytes and B=64, then K will be
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appended with 44 zero bytes 0x00)
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(2) XOR (bitwise exclusive-OR) the B byte string computed in step
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(1) with ipad (ipad = the byte 0x36 repeated B times)
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(3) append the stream of data 'text' to the B byte string resulting
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from step (2)
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(4) apply H to the stream generated in step (3)
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(5) XOR (bitwise exclusive-OR) the B byte string computed in
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step (1) with opad (opad = the byte 0x5C repeated B times.)
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(6) append the H result from step (4) to the B byte string
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resulting from step (5)
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(7) apply H to the stream generated in step (6) and output
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the result
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*/
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#ifdef HMAC
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#define HMAC_BLOCKSIZE hash_descriptor[hash].blocksize
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int hmac_init(hmac_state *hmac, int hash, const unsigned char *key, unsigned long keylen)
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{
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unsigned char buf[MAXBLOCKSIZE];
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unsigned long hashsize;
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unsigned long i, z;
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int err;
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_ARGCHK(hmac != NULL);
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_ARGCHK(key != NULL);
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if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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return err;
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}
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/* valid key length? */
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if (keylen == 0 || keylen > MAXBLOCKSIZE) {
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return CRYPT_INVALID_KEYSIZE;
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}
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hmac->hash = hash;
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// (1) make sure we have a large enough key
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hmac->hashsize = hashsize = hash_descriptor[hash].hashsize;
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if(keylen > HMAC_BLOCKSIZE) {
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z = (unsigned long)sizeof(hmac->key);
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if ((err = hash_memory(hash, key, keylen, hmac->key, &z)) != CRYPT_OK) {
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return err;
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}
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if(hashsize < HMAC_BLOCKSIZE) {
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zeromem((hmac->key) + hashsize, (size_t)(HMAC_BLOCKSIZE - hashsize));
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}
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} else {
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memcpy(hmac->key, key, (size_t)keylen);
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if(keylen < HMAC_BLOCKSIZE) {
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zeromem((hmac->key) + keylen, (size_t)(HMAC_BLOCKSIZE - keylen));
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}
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}
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// Create the initial vector for step (3)
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for(i=0; i < keylen; i++) {
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buf[i] = hmac->key[i] ^ 0x36;
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}
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for( ; i < HMAC_BLOCKSIZE; i++) {
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buf[i] = 0x36;
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}
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// Pre-pend that to the hash data
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hash_descriptor[hash].init(&hmac->md);
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hash_descriptor[hash].process(&hmac->md, buf, HMAC_BLOCKSIZE);
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return CRYPT_OK;
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}
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int hmac_process(hmac_state *hmac, const unsigned char *buf, unsigned long len)
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{
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int err;
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_ARGCHK(hmac != NULL);
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_ARGCHK(buf != NULL);
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if ((err = hash_is_valid(hmac->hash)) != CRYPT_OK) {
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return err;
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}
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hash_descriptor[hmac->hash].process(&hmac->md, buf, len);
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return CRYPT_OK;
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}
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int hmac_done(hmac_state *hmac, unsigned char *hashOut, unsigned long *outlen)
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{
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unsigned char buf[MAXBLOCKSIZE];
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unsigned char isha[MAXBLOCKSIZE];
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unsigned long hashsize, i;
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int hash, err;
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_ARGCHK(hmac != NULL);
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_ARGCHK(hashOut != NULL);
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hash = hmac->hash;
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if((err = hash_is_valid(hash)) != CRYPT_OK) {
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return err;
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}
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/* ensure the output size is valid */
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hashsize = hash_descriptor[hash].hashsize;
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if (*outlen < hashsize) {
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return CRYPT_BUFFER_OVERFLOW;
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}
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*outlen = hashsize;
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// Get the hash of the first HMAC vector plus the data
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hash_descriptor[hash].done(&hmac->md, isha);
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// Create the second HMAC vector vector for step (3)
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for(i=0; i < HMAC_BLOCKSIZE; i++) {
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buf[i] = hmac->key[i] ^ 0x5C;
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}
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// Now calculate the "outer" hash for step (5), (6), and (7)
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hash_descriptor[hash].init(&hmac->md);
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hash_descriptor[hash].process(&hmac->md, buf, HMAC_BLOCKSIZE);
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hash_descriptor[hash].process(&hmac->md, isha, hashsize);
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hash_descriptor[hash].done(&hmac->md, hashOut);
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#ifdef CLEAN_STACK
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zeromem(hmac->key, sizeof(hmac->key));
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#endif
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return CRYPT_OK;
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}
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int hmac_memory(int hash, const unsigned char *key, unsigned long keylen,
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const unsigned char *data, unsigned long len,
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unsigned char *dst, unsigned long *dstlen)
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{
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hmac_state hmac;
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int err;
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_ARGCHK(key != NULL);
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_ARGCHK(data != NULL);
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_ARGCHK(dst != NULL);
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if((err = hash_is_valid(hash)) != CRYPT_OK) {
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return err;
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}
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if ((err = hmac_init(&hmac, hash, key, keylen)) != CRYPT_OK) {
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return err;
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}
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if ((err = hmac_process(&hmac, data, len)) != CRYPT_OK) {
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return err;
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}
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if ((err = hmac_done(&hmac, dst, dstlen)) != CRYPT_OK) {
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return err;
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}
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return CRYPT_OK;
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}
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/* hmac_file added by Tom St Denis */
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int hmac_file(int hash, const char *fname, const unsigned char *key,
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unsigned long keylen,
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unsigned char *dst, unsigned long *dstlen)
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{
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#ifdef NO_FILE
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return CRYPT_NOP;
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#else
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hmac_state hmac;
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FILE *in;
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unsigned char buf[512];
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size_t x;
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int err;
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_ARGCHK(fname != NULL);
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_ARGCHK(key != NULL);
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_ARGCHK(dst != NULL);
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if((err = hash_is_valid(hash)) != CRYPT_OK) {
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return err;
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}
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if ((err = hmac_init(&hmac, hash, key, keylen)) != CRYPT_OK) {
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return err;
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}
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in = fopen(fname, "rb");
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if (in == NULL) {
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return CRYPT_INVALID_ARG;
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}
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/* process the file contents */
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do {
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x = fread(buf, 1, sizeof(buf), in);
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if ((err = hmac_process(&hmac, buf, (unsigned long)x)) != CRYPT_OK) {
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(void)fclose(in);
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return err;
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}
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} while (x == sizeof(buf));
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(void)fclose(in);
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/* get final hmac */
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if ((err = hmac_done(&hmac, dst, dstlen)) != CRYPT_OK) {
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return err;
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}
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#ifdef CLEAN_STACK
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/* clear memory */
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zeromem(buf, sizeof(buf));
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#endif
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return CRYPT_OK;
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#endif
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}
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/*
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TEST CASES SOURCE:
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Network Working Group P. Cheng
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Request for Comments: 2202 IBM
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Category: Informational R. Glenn
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NIST
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September 1997
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Test Cases for HMAC-MD5 and HMAC-SHA-1
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*/
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int hmac_test(void)
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{
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#ifndef LTC_TEST
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return CRYPT_NOP;
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#else
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unsigned char digest[MAXBLOCKSIZE];
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int i;
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struct hmac_test_case {
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int num;
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char *algo;
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unsigned char key[128];
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unsigned long keylen;
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unsigned char data[128];
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unsigned long datalen;
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unsigned char digest[MAXBLOCKSIZE];
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} cases[] = {
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/*
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3. Test Cases for HMAC-SHA-1
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test_case = 1
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key = 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b
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key_len = 20
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data = "Hi Ther 20
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digest = 0x4c1a03424b55e07fe7f27be1d58bb9324a9a5a04
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digest-96 = 0x4c1a03424b55e07fe7f27be1
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*/
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{ 5, "sha1",
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{0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
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0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
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0x0c, 0x0c, 0x0c, 0x0c}, 20,
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"Test With Truncation", 20,
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{0x4c, 0x1a, 0x03, 0x42, 0x4b, 0x55, 0xe0, 0x7f, 0xe7, 0xf2,
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0x7b, 0xe1, 0xd5, 0x8b, 0xb9, 0x32, 0x4a, 0x9a, 0x5a, 0x04} },
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/*
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test_case = 6
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key = 0xaa repeated 80 times
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key_len = 80
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data = "Test Using Larger Than Block-Size Key - Hash Key First"
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data_len = 54
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digest = 0xaa4ae5e15272d00e95705637ce8a3b55ed402112
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*/
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{ 6, "sha1",
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{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa}, 80,
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"Test Using Larger Than Block-Size Key - Hash Key First", 54,
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{0xaa, 0x4a, 0xe5, 0xe1, 0x52, 0x72, 0xd0, 0x0e,
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0x95, 0x70, 0x56, 0x37, 0xce, 0x8a, 0x3b, 0x55,
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0xed, 0x40, 0x21, 0x12} },
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/*
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test_case = 7
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key = 0xaa repeated 80 times
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key_len = 80
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data = "Test Using Larger Than Block-Size Key and Larger
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Than One Block-Size Data"
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data_len = 73
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digest = 0xe8e99d0f45237d786d6bbaa7965c7808bbff1a91
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*/
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{ 7, "sha1",
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{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa}, 80,
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"Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data", 73,
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{0xe8, 0xe9, 0x9d, 0x0f, 0x45, 0x23, 0x7d, 0x78, 0x6d,
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0x6b, 0xba, 0xa7, 0x96, 0x5c, 0x78, 0x08, 0xbb, 0xff, 0x1a, 0x91} },
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/*
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2. Test Cases for HMAC-MD5
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test_case = 1
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key = 0x0b 0b 0b 0b
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0b 0b 0b 0b
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0b 0b 0b 0b
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0b 0b 0b 0b
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key_len = 16
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data = "Hi There"
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data_len = 8
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digest = 0x92 94 72 7a
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36 38 bb 1c
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13 f4 8e f8
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15 8b fc 9d
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*/
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{ 1, "md5",
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{0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
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0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b}, 16,
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"Hi There", 8,
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{0x92, 0x94, 0x72, 0x7a, 0x36, 0x38, 0xbb, 0x1c,
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0x13, 0xf4, 0x8e, 0xf8, 0x15, 0x8b, 0xfc, 0x9d} },
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/*
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test_case = 2
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key = "Jefe"
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key_len = 4
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data = "what do ya want for nothing?"
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data_len = 28
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digest = 0x750c783e6ab0b503eaa86e310a5db738
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*/
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{ 2, "md5",
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"Jefe", 4,
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"what do ya want for nothing?", 28,
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{0x75, 0x0c, 0x78, 0x3e, 0x6a, 0xb0, 0xb5, 0x03,
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0xea, 0xa8, 0x6e, 0x31, 0x0a, 0x5d, 0xb7, 0x38} },
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/*
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test_case = 3
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key = 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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key_len 16
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data = 0xdd repeated 50 times
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data_len = 50
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digest = 0x56be34521d144c88dbb8c733f0e8b3f6
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*/
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{ 3, "md5",
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{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa}, 16,
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{0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd}, 50,
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{0x56, 0xbe, 0x34, 0x52, 0x1d, 0x14, 0x4c, 0x88,
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0xdb, 0xb8, 0xc7, 0x33, 0xf0, 0xe8, 0xb3, 0xf6} },
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/*
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test_case = 4
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key = 0x0102030405060708090a0b0c0d0e0f10111213141516171819
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key_len 25
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data = 0xcd repeated 50 times
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data_len = 50
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digest = 0x697eaf0aca3a3aea3a75164746ffaa79
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*/
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{ 4, "md5",
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{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
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0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14,
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0x15, 0x16, 0x17, 0x18, 0x19}, 25,
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{0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd}, 50,
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{0x69, 0x7e, 0xaf, 0x0a, 0xca, 0x3a, 0x3a, 0xea,
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0x3a, 0x75, 0x16, 0x47, 0x46, 0xff, 0xaa, 0x79} },
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/*
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test_case = 5
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key = 0x0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c
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key_len = 16
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data = "Test With Truncation"
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data_len = 20
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digest = 0x56461ef2342edc00f9bab995690efd4c
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digest-96 0x56461ef2342edc00f9bab995
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*/
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{ 5, "md5",
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{0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c,
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0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c}, 16,
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"Test With Truncation", 20,
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{0x56, 0x46, 0x1e, 0xf2, 0x34, 0x2e, 0xdc, 0x00,
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0xf9, 0xba, 0xb9, 0x95, 0x69, 0x0e, 0xfd, 0x4c} },
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/*
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test_case = 6
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key = 0xaa repeated 80 times
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key_len = 80
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data = "Test Using Larger Than Block-Size Key - Hash
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Key First"
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data_len = 54
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digest = 0x6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd
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*/
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{ 6, "md5",
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{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa}, 80,
|
|
"Test Using Larger Than Block-Size Key - Hash Key First", 54,
|
|
{0x6b, 0x1a, 0xb7, 0xfe, 0x4b, 0xd7, 0xbf, 0x8f,
|
|
0x0b, 0x62, 0xe6, 0xce, 0x61, 0xb9, 0xd0, 0xcd} },
|
|
|
|
/*
|
|
|
|
test_case = 7
|
|
key = 0xaa repeated 80 times
|
|
key_len = 80
|
|
data = "Test Using Larger Than Block-Size Key and Larger
|
|
Than One Block-Size Data"
|
|
data_len = 73
|
|
digest = 0x6f630fad67cda0ee1fb1f562db3aa53e
|
|
*/
|
|
{ 7, "md5",
|
|
{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa}, 80,
|
|
"Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data", 73,
|
|
{0x6f, 0x63, 0x0f, 0xad, 0x67, 0xcd, 0xa0, 0xee,
|
|
0x1f, 0xb1, 0xf5, 0x62, 0xdb, 0x3a, 0xa5, 0x3e} }
|
|
};
|
|
|
|
unsigned long outlen;
|
|
int err;
|
|
int tested=0,failed=0;
|
|
for(i=0; i < (int)(sizeof(cases) / sizeof(cases[0])); i++) {
|
|
int hash = find_hash(cases[i].algo);
|
|
if (hash == -1) continue;
|
|
++tested;
|
|
outlen = sizeof(digest);
|
|
if((err = hmac_memory(hash, cases[i].key, cases[i].keylen, cases[i].data, cases[i].datalen, digest, &outlen)) != CRYPT_OK) {
|
|
#if 0
|
|
printf("HMAC-%s test #%d\n", cases[i].algo, cases[i].num);
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
if(memcmp(digest, cases[i].digest, (size_t)hash_descriptor[hash].hashsize) != 0) {
|
|
#if 0
|
|
unsigned int j;
|
|
printf("\nHMAC-%s test #%d:\n", cases[i].algo, cases[i].num);
|
|
printf( "Result: 0x");
|
|
for(j=0; j < hash_descriptor[hash].hashsize; j++) {
|
|
printf("%2x ", digest[j]);
|
|
}
|
|
printf("\nCorrect: 0x");
|
|
for(j=0; j < hash_descriptor[hash].hashsize; j++) {
|
|
printf("%2x ", cases[i].digest[j]);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
failed++;
|
|
//return CRYPT_ERROR;
|
|
} else {
|
|
/* printf("HMAC-%s test #%d: Passed\n", cases[i].algo, cases[i].num); */
|
|
}
|
|
}
|
|
|
|
if (failed != 0) {
|
|
return CRYPT_FAIL_TESTVECTOR;
|
|
} else if (tested == 0) {
|
|
return CRYPT_NOP;
|
|
} else {
|
|
return CRYPT_OK;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|