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SSH-01-006: Add missing NULL check in ssh_packet_hmac_verify()

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Fixes T193

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This commit is contained in:
Andreas Schneider
2019-10-28 14:20:39 +01:00
parent 924dc5aed8
commit 69daa602b8
1 changed files with 4 additions and 0 deletions
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4
src/packet_crypt.c
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@@ -255,6 +255,10 @@ int ssh_packet_hmac_verify(ssh_session session,
}
crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_IN);
if (crypto == NULL) {
return SSH_ERROR;
}
ctx = hmac_init(crypto->decryptMAC, hmac_digest_len(type), type);
if (ctx == NULL) {
return -1;