🌅 complete OS X keychain implementation.

Signed-off-by: David Calavera <david.calavera@gmail.com>

osxkeychain/osxkeychain_darwin.c

@@ -0,0 +1,98 @@
+#include "osxkeychain_darwin.h"
+
+char *get_error(OSStatus status) {
+  char *buf = malloc(128);
+  CFStringRef str = SecCopyErrorMessageString(status, NULL);
+  int success = CFStringGetCString(str, buf, 128, kCFStringEncodingUTF8);
+  if (success) {
+    strncpy(buf, "Unknown error", 128);
+  }
+  return buf;
+}
+
+char *keychain_add(struct Server *server, char *username, char *password) {
+  OSStatus status = SecKeychainAddInternetPassword(
+    NULL,
+    strlen(server->host), server->host,
+    0, NULL,
+    strlen(username), username,
+    strlen(server->path), server->path,
+    server->port,
+    server->proto,
+    kSecAuthenticationTypeDefault,
+    strlen(password), password,
+    NULL
+  );
+  if (status) {
+    return get_error(status);
+  }
+  return NULL;
+}
+
+char *keychain_get(struct Server *server, unsigned int *username_l, char **username, unsigned int *password_l, char **password) {
+  char *tmp;
+  SecKeychainItemRef item;
+
+  OSStatus status = SecKeychainFindInternetPassword(
+    NULL,
+    strlen(server->host), server->host,
+    0, NULL,
+    0, NULL,
+    strlen(server->path), server->path,
+    server->port,
+    server->proto,
+    kSecAuthenticationTypeDefault,
+    password_l, (void **)&tmp,
+    &item);
+
+  if (status) {
+    return get_error(status);
+  }
+
+  *password = strdup(tmp);
+  SecKeychainItemFreeContent(NULL, tmp);
+
+  SecKeychainAttributeList list;
+  SecKeychainAttribute attr;
+
+  list.count = 1;
+  list.attr = &attr;
+  attr.tag = kSecAccountItemAttr;
+
+  status = SecKeychainItemCopyContent(item, NULL, &list, NULL, NULL);
+  if (status) {
+    return get_error(status);
+  }
+
+  *username = strdup(attr.data);
+  *username_l = attr.length;
+  SecKeychainItemFreeContent(&list, NULL);
+
+  return NULL;
+}
+
+char *keychain_delete(struct Server *server) {
+  SecKeychainItemRef item;
+
+  OSStatus status = SecKeychainFindInternetPassword(
+    NULL,
+    strlen(server->host), server->host,
+    0, NULL,
+    0, NULL,
+    strlen(server->path), server->path,
+    server->port,
+    server->proto,
+    kSecAuthenticationTypeDefault,
+    0, NULL,
+    &item);
+
+  if (status) {
+    return get_error(status);
+  }
+
+  status = SecKeychainItemDelete(item);
+  if (status) {
+    return get_error(status);
+  }
+  return NULL;
+}