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-rw-r--r--lib/vssh/libssh.c98
1 files changed, 92 insertions, 6 deletions
diff --git a/lib/vssh/libssh.c b/lib/vssh/libssh.c
index f66db318d..647b4d491 100644
--- a/lib/vssh/libssh.c
+++ b/lib/vssh/libssh.c
@@ -322,14 +322,25 @@ static int myssh_is_known(struct connectdata *conn)
ssh_key pubkey;
size_t hlen;
unsigned char *hash = NULL;
- char *base64 = NULL;
+ char *found_base64 = NULL;
+ char *known_base64 = NULL;
int vstate;
enum curl_khmatch keymatch;
struct curl_khkey foundkey;
+ struct curl_khkey *knownkeyp = NULL;
curl_sshkeycallback func =
data->set.ssh_keyfunc;
+#if LIBSSH_VERSION_INT >= SSH_VERSION_INT(0,9,0)
+ struct ssh_knownhosts_entry *knownhostsentry = NULL;
+ struct curl_khkey knownkey;
+#endif
+
+#if LIBSSH_VERSION_INT >= SSH_VERSION_INT(0,8,0)
+ rc = ssh_get_server_publickey(sshc->ssh_session, &pubkey);
+#else
rc = ssh_get_publickey(sshc->ssh_session, &pubkey);
+#endif
if(rc != SSH_OK)
return rc;
@@ -354,6 +365,65 @@ static int myssh_is_known(struct connectdata *conn)
goto cleanup;
}
+#if LIBSSH_VERSION_INT >= SSH_VERSION_INT(0,9,0)
+ /* Get the known_key from the known hosts file */
+ vstate = ssh_session_get_known_hosts_entry(sshc->ssh_session,
+ &knownhostsentry);
+
+ /* Case an entry was found in a known hosts file */
+ if(knownhostsentry) {
+ if(knownhostsentry->publickey) {
+ rc = ssh_pki_export_pubkey_base64(knownhostsentry->publickey,
+ &known_base64);
+ if(rc != SSH_OK) {
+ goto cleanup;
+ }
+ knownkey.key = known_base64;
+ knownkey.len = strlen(known_base64);
+
+ switch(ssh_key_type(knownhostsentry->publickey)) {
+ case SSH_KEYTYPE_RSA:
+ knownkey.keytype = CURLKHTYPE_RSA;
+ break;
+ case SSH_KEYTYPE_RSA1:
+ knownkey.keytype = CURLKHTYPE_RSA1;
+ break;
+ case SSH_KEYTYPE_ECDSA:
+ knownkey.keytype = CURLKHTYPE_ECDSA;
+ break;
+ case SSH_KEYTYPE_ED25519:
+ knownkey.keytype = CURLKHTYPE_ED25519;
+ break;
+ case SSH_KEYTYPE_DSS:
+ knownkey.keytype = CURLKHTYPE_DSS;
+ break;
+ default:
+ rc = SSH_ERROR;
+ goto cleanup;
+ }
+ knownkeyp = &knownkey;
+ }
+ }
+
+ switch(vstate) {
+ case SSH_KNOWN_HOSTS_OK:
+ keymatch = CURLKHMATCH_OK;
+ break;
+ case SSH_KNOWN_HOSTS_OTHER:
+ /* fallthrough */
+ case SSH_KNOWN_HOSTS_NOT_FOUND:
+ /* fallthrough */
+ case SSH_KNOWN_HOSTS_UNKNOWN:
+ /* fallthrough */
+ case SSH_KNOWN_HOSTS_ERROR:
+ keymatch = CURLKHMATCH_MISSING;
+ break;
+ default:
+ keymatch = CURLKHMATCH_MISMATCH;
+ break;
+ }
+
+#else
vstate = ssh_is_server_known(sshc->ssh_session);
switch(vstate) {
case SSH_SERVER_KNOWN_OK:
@@ -368,14 +438,15 @@ static int myssh_is_known(struct connectdata *conn)
keymatch = CURLKHMATCH_MISMATCH;
break;
}
+#endif
if(func) { /* use callback to determine action */
- rc = ssh_pki_export_pubkey_base64(pubkey, &base64);
+ rc = ssh_pki_export_pubkey_base64(pubkey, &found_base64);
if(rc != SSH_OK)
goto cleanup;
- foundkey.key = base64;
- foundkey.len = strlen(base64);
+ foundkey.key = found_base64;
+ foundkey.len = strlen(found_base64);
switch(ssh_key_type(pubkey)) {
case SSH_KEYTYPE_RSA:
@@ -400,15 +471,19 @@ static int myssh_is_known(struct connectdata *conn)
goto cleanup;
}
- /* we don't have anything equivalent to knownkey. Always NULL */
Curl_set_in_callback(data, true);
- rc = func(data, NULL, &foundkey, /* from the remote host */
+ rc = func(data, knownkeyp, /* from the knownhosts file */
+ &foundkey, /* from the remote host */
keymatch, data->set.ssh_keyfunc_userp);
Curl_set_in_callback(data, false);
switch(rc) {
case CURLKHSTAT_FINE_ADD_TO_FILE:
+#if LIBSSH_VERSION_INT >= SSH_VERSION_INT(0,8,0)
+ rc = ssh_session_update_known_hosts(sshc->ssh_session);
+#else
rc = ssh_write_knownhost(sshc->ssh_session);
+#endif
if(rc != SSH_OK) {
goto cleanup;
}
@@ -429,9 +504,20 @@ static int myssh_is_known(struct connectdata *conn)
rc = SSH_OK;
cleanup:
+ if(found_base64) {
+ free(found_base64);
+ }
+ if(known_base64) {
+ free(known_base64);
+ }
if(hash)
ssh_clean_pubkey_hash(&hash);
ssh_key_free(pubkey);
+#if LIBSSH_VERSION_INT >= SSH_VERSION_INT(0,9,0)
+ if(knownhostsentry) {
+ ssh_knownhosts_entry_free(knownhostsentry);
+ }
+#endif
return rc;
}