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libcli:smb: Use GnuTLS HMAC MD5 in smb_key_derivation()

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Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andreas Schneider 2019-05-15 08:09:35 +02:00 committed by Andrew Bartlett
parent f7d952398b
commit 940e0c106c
1 changed files with 7 additions and 7 deletions
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14
libcli/smb/smb_signing.c
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@ -20,7 +20,6 @@
*/
#include "includes.h"
#include "../lib/crypto/crypto.h"
#include "smb_common.h"
#include "smb_signing.h"
@ -520,11 +519,12 @@ void smb_key_derivation(const uint8_t *KI, size_t KI_len,
0x31, 0x66, 0x09, 0x48, 0x88, 0xcc, 0x18, 0xa3,
0xb2, 0x1f, 0x1f, 0x1b, 0x90, 0x4e, 0xd7, 0xe1
};
HMACMD5Context ctx;
hmac_md5_init_limK_to_64(KI, KI_len, &ctx);
hmac_md5_update(SSKeyHash, sizeof(SSKeyHash), &ctx);
hmac_md5_final(KO, &ctx);
ZERO_STRUCT(ctx);
/* The callers passing down KI_len of 16 so no need to limit to 64 */
gnutls_hmac_fast(GNUTLS_MAC_MD5,
KI,
KI_len,
SSKeyHash,
sizeof(SSKeyHash),
KO);
}