keyfiles: Make ssh_try_publickey_from_file() legacy.

1 files changed, 65 insertions, 0 deletions

diff --git a/src/legacy.c b/src/legacy.c
index 9550834..ac98478 100644
--- a/src/legacy.c
+++ b/src/legacy.c
@@ -572,6 +572,71 @@ int ssh_publickey_to_file(ssh_session session,
     return SSH_OK;
 }
 
+int ssh_try_publickey_from_file(ssh_session session,
+                                const char *keyfile,
+                                ssh_string *publickey,
+                                int *type) {
+    char *pubkey_file;
+    size_t len;
+    ssh_string pubkey_string;
+    int pubkey_type;
+
+    if (session == NULL || keyfile == NULL || publickey == NULL || type == NULL) {
+        return -1;
+    }
+
+    if (session->sshdir == NULL) {
+        if (ssh_options_apply(session) < 0) {
+            return -1;
+        }
+    }
+
+    ssh_log(session, SSH_LOG_PACKET, "Trying to open privatekey %s", keyfile);
+    if (!ssh_file_readaccess_ok(keyfile)) {
+        ssh_log(session, SSH_LOG_PACKET, "Failed to open privatekey %s", keyfile);
+        return -1;
+    }
+
+    len = strlen(keyfile) + 5;
+    pubkey_file = malloc(len);
+    if (pubkey_file == NULL) {
+        return -1;
+    }
+    snprintf(pubkey_file, len, "%s.pub", keyfile);
+
+    ssh_log(session, SSH_LOG_PACKET, "Trying to open publickey %s",
+            pubkey_file);
+    if (!ssh_file_readaccess_ok(pubkey_file)) {
+        ssh_log(session, SSH_LOG_PACKET, "Failed to open publickey %s",
+                pubkey_file);
+        SAFE_FREE(pubkey_file);
+        return 1;
+    }
+
+    ssh_log(session, SSH_LOG_PACKET, "Success opening public and private key");
+
+    /*
+     * We are sure both the private and public key file is readable. We return
+     * the public as a string, and the private filename as an argument
+     */
+    pubkey_string = publickey_from_file(session, pubkey_file, &pubkey_type);
+    if (pubkey_string == NULL) {
+        ssh_log(session, SSH_LOG_PACKET,
+                "Wasn't able to open public key file %s: %s",
+                pubkey_file,
+                ssh_get_error(session));
+        SAFE_FREE(pubkey_file);
+        return -1;
+    }
+
+    SAFE_FREE(pubkey_file);
+
+    *publickey = pubkey_string;
+    *type = pubkey_type;
+
+    return 0;
+}
+
 /****************************************************************************
  * SERVER SUPPORT
  ****************************************************************************/