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packet: Check if set_*_key functions exists before calling it

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Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Jakub Jelen
2020-04-28 12:27:03 +02:00
committed by Andreas Schneider
parent 201fd66176
commit 239eef6322
1 changed files with 19 additions and 15 deletions
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34
src/packet.c
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@@ -1969,23 +1969,27 @@ ssh_packet_set_newkeys(ssh_session session,
session->opts.rekey_time/1000);
}
/* Initialize the encryption and decryption keys in next_crypto */
rc = in_cipher->set_decrypt_key(in_cipher,
session->next_crypto->decryptkey,
session->next_crypto->decryptIV);
if (rc < 0) {
/* On error, make sure it is not used */
session->next_crypto->used = 0;
return SSH_ERROR;
if (in_cipher->set_decrypt_key) {
/* Initialize the encryption and decryption keys in next_crypto */
rc = in_cipher->set_decrypt_key(in_cipher,
session->next_crypto->decryptkey,
session->next_crypto->decryptIV);
if (rc < 0) {
/* On error, make sure it is not used */
session->next_crypto->used = 0;
return SSH_ERROR;
}
}
rc = out_cipher->set_encrypt_key(out_cipher,
session->next_crypto->encryptkey,
session->next_crypto->encryptIV);
if (rc < 0) {
/* On error, make sure it is not used */
session->next_crypto->used = 0;
return SSH_ERROR;
if (out_cipher->set_encrypt_key) {
rc = out_cipher->set_encrypt_key(out_cipher,
session->next_crypto->encryptkey,
session->next_crypto->encryptIV);
if (rc < 0) {
/* On error, make sure it is not used */
session->next_crypto->used = 0;
return SSH_ERROR;
}
}
return SSH_OK;