hmac_md5.c File Reference

#include "hmac_md5.h"

Include dependency graph for hmac_md5.c:

Go to the source code of this file.

Functions
void	HMACMD5Init (HMAC_MD5_CTX *ctx, const unsigned char *key, unsigned int key_len)
void	HMACMD5Update (HMAC_MD5_CTX *ctx, const unsigned char *data, unsigned int data_len)
void	HMACMD5Final (HMAC_MD5_CTX *ctx, unsigned char *digest)

Function Documentation

HMACMD5Final()

void HMACMD5Final	(	HMAC_MD5_CTX *	ctx,
		unsigned char *	digest
	)

Definition at line 63 of file hmac_md5.c.

{
    MD5_CTX outer_ctx;
    unsigned char inner_digest[16];
 
    MD5Final(&(ctx->ctx));
    memcpy(inner_digest, ctx->ctx.digest, 16);
 
    MD5Init(&outer_ctx);
    MD5Update(&outer_ctx, ctx->outer_padding, 64);
    MD5Update(&outer_ctx, inner_digest, 16);
    MD5Final(&outer_ctx);
 
    memcpy(digest, outer_ctx.digest, 16);
}

Referenced by ntlm_CreateSignature().

HMACMD5Init()

void HMACMD5Init	(	HMAC_MD5_CTX *	ctx,
		const unsigned char *	key,
		unsigned int	key_len
	)

Definition at line 24 of file hmac_md5.c.

{
    int i;
    unsigned char inner_padding[64];
    unsigned char temp_key[16];
 
    if(key_len > 64)
    {
        MD5_CTX temp_ctx;
 
        MD5Init(&temp_ctx);
        MD5Update(&temp_ctx, key, key_len);
        MD5Final(&temp_ctx);
        memcpy(temp_key, temp_ctx.digest, 16);
 
        key = temp_key;
        key_len = 16;
    }
 
    memset(inner_padding, 0, 64);
    memset(ctx->outer_padding, 0, 64);
    memcpy(inner_padding, key, key_len);
    memcpy(ctx->outer_padding, key, key_len);
 
    for(i = 0; i < 64; ++i)
    {
        inner_padding[i] ^= 0x36;
        ctx->outer_padding[i] ^= 0x5c;
    }
 
    MD5Init(&(ctx->ctx));
    MD5Update(&(ctx->ctx), inner_padding, 64);
}

Referenced by ntlm_CreateSignature().

HMACMD5Update()

void HMACMD5Update	(	HMAC_MD5_CTX *	ctx,
		const unsigned char *	data,
		unsigned int	data_len
	)

Definition at line 58 of file hmac_md5.c.

{
    MD5Update(&(ctx->ctx), data, data_len);
}

Referenced by ntlm_CreateSignature().