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EPEE: Remove hmac-md5
This commit is contained in:
Jeffrey
parent
9f814edbd7
commit
63c7f8ba6e
3 changed files with 0 additions and 302 deletions
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@ -65,7 +65,6 @@ documentation and/or software.
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#endif
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#include "md5global.h"
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#include "md5_l.h"
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#include "hmac-md5.h"
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namespace md5
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{
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@ -89,16 +88,6 @@ namespace md5
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#define S43 15
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#define S44 21
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/*
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
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static void Encode PROTO_LIST
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((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
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((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
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static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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*/
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static void MD5_memcpy (POINTER output, POINTER input, unsigned int len)
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{
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unsigned int i;
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@ -107,17 +96,6 @@ namespace md5
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output[i] = input[i];
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}
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/* Note: Replace "for loop" with standard memset if possible.
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*/
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static void MD5_memset (POINTER output, int value, unsigned int len)
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{
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unsigned int i;
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for (i = 0; i < len; i++)
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((char *)output)[i] = (char)value;
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}
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static void MD5Transform (UINT4 state[4], unsigned char block[64]);
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static unsigned char* PADDING()
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@ -371,190 +349,4 @@ namespace md5
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*/
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memwipe ((POINTER)x, sizeof (x));
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}
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/* Note: Replace "for loop" with standard memcpy if possible.
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*/
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inline
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void hmac_md5_init(HMAC_MD5_CTX *hmac,
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const unsigned char *key,
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int key_len)
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{
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unsigned char k_ipad[65]; /* inner padding -
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* key XORd with ipad
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*/
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unsigned char k_opad[65]; /* outer padding -
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* key XORd with opad
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*/
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unsigned char tk[16];
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int i;
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/* if key is longer than 64 bytes reset it to key=MD5(key) */
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if (key_len > 64) {
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MD5_CTX tctx;
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MD5Init(&tctx);
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MD5Update(&tctx, key, key_len);
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MD5Final(tk, &tctx);
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key = tk;
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key_len = 16;
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}
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/*
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* the HMAC_MD5 transform looks like:
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*
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* MD5(K XOR opad, MD5(K XOR ipad, text))
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*
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* where K is an n byte key
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* ipad is the byte 0x36 repeated 64 times
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* opad is the byte 0x5c repeated 64 times
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* and text is the data being protected
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*/
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/* start out by storing key in pads */
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MD5_memset(k_ipad, '\0', sizeof k_ipad);
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MD5_memset(k_opad, '\0', sizeof k_opad);
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MD5_memcpy( k_ipad, (POINTER)key, key_len);
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MD5_memcpy( k_opad, (POINTER)key, key_len);
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/* XOR key with ipad and opad values */
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for (i=0; i<64; i++) {
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k_ipad[i] ^= 0x36;
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k_opad[i] ^= 0x5c;
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}
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MD5Init(&hmac->ictx); /* init inner context */
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MD5Update(&hmac->ictx, k_ipad, 64); /* apply inner pad */
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MD5Init(&hmac->octx); /* init outer context */
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MD5Update(&hmac->octx, k_opad, 64); /* apply outer pad */
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/* scrub the pads and key context (if used) */
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memwipe( (POINTER)&k_ipad, sizeof(k_ipad));
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memwipe( (POINTER)&k_opad, sizeof(k_opad));
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memwipe( (POINTER)&tk, sizeof(tk));
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/* and we're done. */
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}
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/* The precalc and import routines here rely on the fact that we pad
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* the key out to 64 bytes and use that to initialize the md5
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* contexts, and that updating an md5 context with 64 bytes of data
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* leaves nothing left over; all of the interesting state is contained
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* in the state field, and none of it is left over in the count and
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* buffer fields. So all we have to do is save the state field; we
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* can zero the others when we reload it. Which is why the decision
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* was made to pad the key out to 64 bytes in the first place. */
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inline
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void hmac_md5_precalc(HMAC_MD5_STATE *state,
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const unsigned char *key,
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int key_len)
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{
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HMAC_MD5_CTX hmac;
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unsigned lupe;
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hmac_md5_init(&hmac, key, key_len);
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for (lupe = 0; lupe < 4; lupe++) {
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state->istate[lupe] = htonl(hmac.ictx.state[lupe]);
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state->ostate[lupe] = htonl(hmac.octx.state[lupe]);
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}
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memwipe( (POINTER)&hmac, sizeof(hmac));
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}
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inline
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void hmac_md5_import(HMAC_MD5_CTX *hmac,
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HMAC_MD5_STATE *state)
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{
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unsigned lupe;
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MD5_memset( (POINTER)hmac, 0, sizeof(HMAC_MD5_CTX));
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for (lupe = 0; lupe < 4; lupe++) {
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hmac->ictx.state[lupe] = ntohl(state->istate[lupe]);
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hmac->octx.state[lupe] = ntohl(state->ostate[lupe]);
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}
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/* Init the counts to account for our having applied
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* 64 bytes of key; this works out to 0x200 (64 << 3; see
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* MD5Update above...) */
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hmac->ictx.count[0] = hmac->octx.count[0] = 0x200;
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}
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inline
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void hmac_md5_final(unsigned char digest[HMAC_MD5_SIZE],
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HMAC_MD5_CTX *hmac)
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{
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MD5Final(digest, &hmac->ictx); /* Finalize inner md5 */
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MD5Update(&hmac->octx, digest, 16); /* Update outer ctx */
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MD5Final(digest, &hmac->octx); /* Finalize outer md5 */
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}
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void hmac_md5(const unsigned char* text, int text_len, const unsigned char* key, int key_len, unsigned char *digest)
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{
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MD5_CTX context;
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unsigned char k_ipad[65]; /* inner padding -
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* key XORd with ipad
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*/
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unsigned char k_opad[65]; /* outer padding -
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* key XORd with opad
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*/
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unsigned char tk[16];
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int i;
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/* if key is longer than 64 bytes reset it to key=MD5(key) */
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if (key_len > 64) {
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MD5_CTX tctx;
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MD5Init(&tctx);
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MD5Update(&tctx, key, key_len);
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MD5Final(tk, &tctx);
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key = tk;
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key_len = 16;
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}
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/*
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* the HMAC_MD5 transform looks like:
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*
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* MD5(K XOR opad, MD5(K XOR ipad, text))
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*
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* where K is an n byte key
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* ipad is the byte 0x36 repeated 64 times
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* opad is the byte 0x5c repeated 64 times
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* and text is the data being protected
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*/
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/* start out by storing key in pads */
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MD5_memset(k_ipad, '\0', sizeof k_ipad);
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MD5_memset(k_opad, '\0', sizeof k_opad);
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MD5_memcpy( k_ipad, (POINTER)key, key_len);
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MD5_memcpy( k_opad, (POINTER)key, key_len);
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/* XOR key with ipad and opad values */
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for (i=0; i<64; i++) {
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k_ipad[i] ^= 0x36;
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k_opad[i] ^= 0x5c;
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}
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/*
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* perform inner MD5
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*/
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MD5Init(&context); /* init context for 1st
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* pass */
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MD5Update(&context, k_ipad, 64); /* start with inner pad */
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MD5Update(&context, text, text_len); /* then text of datagram */
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MD5Final(digest, &context); /* finish up 1st pass */
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/*
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* perform outer MD5
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*/
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MD5Init(&context); /* init context for 2nd
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* pass */
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MD5Update(&context, k_opad, 64); /* start with outer pad */
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MD5Update(&context, digest, 16); /* then results of 1st
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* hash */
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MD5Final(digest, &context); /* finish up 2nd pass */
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}
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}
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