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- Fixed faulty HMAC-MD2 implementation (Fixes ticket #37)

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This commit is contained in:
Paul Bakker
2011-10-06 14:18:49 +00:00
parent d246ed30bd
commit fa1c592860
5 changed files with 33 additions and 17 deletions
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12
library/md2.c
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@ -219,15 +219,15 @@ void md2_hmac_starts( md2_context *ctx, const unsigned char *key, size_t keylen
size_t i;
unsigned char sum[16];
if( keylen > 64 )
if( keylen > 16 )
{
md2( key, keylen, sum );
keylen = 16;
key = sum;
}
memset( ctx->ipad, 0x36, 64 );
memset( ctx->opad, 0x5C, 64 );
memset( ctx->ipad, 0x36, 16 );
memset( ctx->opad, 0x5C, 16 );
for( i = 0; i < keylen; i++ )
{
@ -236,7 +236,7 @@ void md2_hmac_starts( md2_context *ctx, const unsigned char *key, size_t keylen
}
md2_starts( ctx );
md2_update( ctx, ctx->ipad, 64 );
md2_update( ctx, ctx->ipad, 16 );
memset( sum, 0, sizeof( sum ) );
}
@ -258,7 +258,7 @@ void md2_hmac_finish( md2_context *ctx, unsigned char output[16] )
md2_finish( ctx, tmpbuf );
md2_starts( ctx );
md2_update( ctx, ctx->opad, 64 );
md2_update( ctx, ctx->opad, 16 );
md2_update( ctx, tmpbuf, 16 );
md2_finish( ctx, output );
@ -271,7 +271,7 @@ void md2_hmac_finish( md2_context *ctx, unsigned char output[16] )
void md2_hmac_reset( md2_context *ctx )
{
md2_starts( ctx );
md2_update( ctx, ctx->ipad, 64 );
md2_update( ctx, ctx->ipad, 16 );
}
/*