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kex: use distinctive error strings

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Use unique error strings to help localize errors.

Closes #1011
This commit is contained in:
Viktor Szakats
2023-04-17 11:07:21 +00:00
parent a683133dfe
commit 59ed0a784e
1 changed files with 44 additions and 34 deletions
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78
src/kex.c
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@@ -369,7 +369,7 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
/* Parse KEXDH_REPLY */
if(exchange_state->s_packet_len < 5) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected packet length");
"Unexpected packet length DH-SHA");
goto clean_exit;
}
@@ -481,14 +481,15 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
session->server_hostkey_len,
&session->server_hostkey_abstract)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_INIT,
"Unable to initialize hostkey importer");
"Unable to initialize hostkey importer "
"DH-SHA");
goto clean_exit;
}
if(_libssh2_get_string(&buf, &(exchange_state->f_value),
&(exchange_state->f_value_len))) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_INIT,
"Unable to get f value");
"Unable to get DH-SHA f value");
goto clean_exit;
}
@@ -498,7 +499,7 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
if(_libssh2_get_string(&buf, &(exchange_state->h_sig),
&(exchange_state->h_sig_len))) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_INIT,
"Unable to get h sig");
"Unable to get DH-SHA h sig");
goto clean_exit;
}
@@ -514,7 +515,7 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
LIBSSH2_ALLOC(session, exchange_state->k_value_len);
if(!exchange_state->k_value) {
ret = _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate buffer for K");
"Unable to allocate buffer for DH-SHA K");
goto clean_exit;
}
_libssh2_htonu32(exchange_state->k_value,
@@ -623,7 +624,8 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
exchange_state->h_sig_len, exchange_state->h_sig_comp,
digest_len, &session->server_hostkey_abstract)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_SIGN,
"Unable to verify hostkey signature");
"Unable to verify hostkey signature "
"DH-SHA");
goto clean_exit;
}
@@ -641,7 +643,7 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
}
else if(rc) {
ret = _libssh2_error(session, rc,
"Unable to send NEWKEYS message");
"Unable to send NEWKEYS message DH-SHA");
goto clean_exit;
}
@@ -657,14 +659,16 @@ static int diffie_hellman_sha_algo(LIBSSH2_SESSION *session,
return rc;
}
else if(rc) {
ret = _libssh2_error(session, rc, "Timed out waiting for NEWKEYS");
ret = _libssh2_error(session, rc,
"Timed out waiting for NEWKEYS DH-SHA");
goto clean_exit;
}
/* The first key exchange has been performed,
switch to active crypt/comp/mac mode */
session->state |= LIBSSH2_STATE_NEWKEYS;
_libssh2_debug((session, LIBSSH2_TRACE_KEX,
"Received NEWKEYS message"));
"Received NEWKEYS message DH-SHA"));
/* This will actually end up being just packet_type(1)
for this packet type anyway */
@@ -1385,7 +1389,7 @@ kex_method_diffie_hellman_group_exchange_sha1_key_exchange(
if(key_state->data_len < 9) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected key length");
"Unexpected key length DH-SHA1");
goto dh_gex_clean_exit;
}
@@ -1397,13 +1401,13 @@ kex_method_diffie_hellman_group_exchange_sha1_key_exchange(
if(_libssh2_get_bignum_bytes(&buf, &p, &p_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected value");
"Unexpected value DH-SHA1 p");
goto dh_gex_clean_exit;
}
if(_libssh2_get_bignum_bytes(&buf, &g, &g_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected value");
"Unexpected value DH-SHA1 g");
goto dh_gex_clean_exit;
}
@@ -1504,7 +1508,7 @@ kex_method_diffie_hellman_group_exchange_sha256_key_exchange(
if(key_state->data_len < 9) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected key length");
"Unexpected key length DH-SHA256");
goto dh_gex_clean_exit;
}
@@ -1516,13 +1520,13 @@ kex_method_diffie_hellman_group_exchange_sha256_key_exchange(
if(_libssh2_get_bignum_bytes(&buf, &p, &p_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected value");
"Unexpected value DH-SHA256 p");
goto dh_gex_clean_exit;
}
if(_libssh2_get_bignum_bytes(&buf, &g, &g_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected value");
"Unexpected value DH-SHA256 g");
goto dh_gex_clean_exit;
}
@@ -1746,7 +1750,7 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
&server_public_key_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate memory for a copy "
"of the host key");
"of the host ECDH key");
goto clean_exit;
}
@@ -1843,7 +1847,8 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
session->server_hostkey_len,
&session->server_hostkey_abstract)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_INIT,
"Unable to initialize hostkey importer");
"Unable to initialize hostkey importer "
"ECDH");
goto clean_exit;
}
@@ -1851,7 +1856,7 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
if(_libssh2_get_string(&buf, &server_public_key,
&server_public_key_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected key length");
"Unexpected key length ECDH");
goto clean_exit;
}
@@ -1859,7 +1864,7 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
if(_libssh2_get_string(&buf, &exchange_state->h_sig,
&(exchange_state->h_sig_len))) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_INIT,
"Unexpected ecdh server sig length");
"Unexpected ECDH server sig length");
goto clean_exit;
}
@@ -1881,7 +1886,7 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
LIBSSH2_ALLOC(session, exchange_state->k_value_len);
if(!exchange_state->k_value) {
ret = _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate buffer for K");
"Unable to allocate buffer for ECDH K");
goto clean_exit;
}
_libssh2_htonu32(exchange_state->k_value,
@@ -1911,7 +1916,8 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
if(rc) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_SIGN,
"Unable to verify hostkey signature");
"Unable to verify hostkey signature "
"ECDH");
goto clean_exit;
}
@@ -1926,7 +1932,7 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
}
else if(rc) {
ret = _libssh2_error(session, rc,
"Unable to send NEWKEYS message");
"Unable to send NEWKEYS message ECDH");
goto clean_exit;
}
@@ -1942,7 +1948,8 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
return rc;
}
else if(rc) {
ret = _libssh2_error(session, rc, "Timed out waiting for NEWKEYS");
ret = _libssh2_error(session, rc,
"Timed out waiting for NEWKEYS ECDH");
goto clean_exit;
}
@@ -1950,7 +1957,7 @@ static int ecdh_sha2_nistp(LIBSSH2_SESSION *session, libssh2_curve_type type,
switch to active crypt/comp/mac mode */
session->state |= LIBSSH2_STATE_NEWKEYS;
_libssh2_debug((session, LIBSSH2_TRACE_KEX,
"Received NEWKEYS message"));
"Received NEWKEYS message ECDH"));
/* This will actually end up being just packet_type(1)
for this packet type anyway */
@@ -2353,7 +2360,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
if(data_len < 5) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected key length");
"Unexpected curve25519 key length 1");
goto clean_exit;
}
@@ -2364,7 +2371,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
if(_libssh2_get_string(&buf, &server_host_key, &hostkey_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected key length");
"Unexpected curve25519 key length 2");
goto clean_exit;
}
@@ -2374,7 +2381,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
if(!session->server_hostkey) {
ret = _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate memory for a copy "
"of the host key");
"of the host curve25519 key");
goto clean_exit;
}
@@ -2472,7 +2479,8 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
session->server_hostkey_len,
&session->server_hostkey_abstract)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_INIT,
"Unable to initialize hostkey importer");
"Unable to initialize hostkey importer "
"curve25519");
goto clean_exit;
}
@@ -2480,7 +2488,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
if(_libssh2_get_string(&buf, &server_public_key,
&server_public_key_len)) {
ret = _libssh2_error(session, LIBSSH2_ERROR_PROTO,
"Unexpected key length");
"Unexpected curve25519 key length");
goto clean_exit;
}
@@ -2504,7 +2512,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
server_public_key);
if(rc) {
ret = _libssh2_error(session, LIBSSH2_ERROR_KEX_FAILURE,
"Unable to create ECDH shared secret");
"Unable to create curve25519 shared secret");
goto clean_exit;
}
@@ -2535,7 +2543,8 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
if(rc) {
ret = _libssh2_error(session, LIBSSH2_ERROR_HOSTKEY_SIGN,
"Unable to verify hostkey signature");
"Unable to verify hostkey signature "
"curve25519");
goto clean_exit;
}
@@ -2550,7 +2559,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
}
else if(rc) {
ret = _libssh2_error(session, rc,
"Unable to send NEWKEYS message");
"Unable to send NEWKEYS message curve25519");
goto clean_exit;
}
@@ -2566,7 +2575,8 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
return rc;
}
else if(rc) {
ret = _libssh2_error(session, rc, "Timed out waiting for NEWKEYS");
ret = _libssh2_error(session, rc,
"Timed out waiting for NEWKEYS curve25519");
goto clean_exit;
}
@@ -2574,7 +2584,7 @@ curve25519_sha256(LIBSSH2_SESSION *session, unsigned char *data,
switch to active crypt/comp/mac mode */
session->state |= LIBSSH2_STATE_NEWKEYS;
_libssh2_debug((session, LIBSSH2_TRACE_KEX,
"Received NEWKEYS message"));
"Received NEWKEYS message curve25519"));
/* This will actually end up being just packet_type(1)
for this packet type anyway */