1 files changed, 41 insertions, 0 deletions
diff --git a/src/lib-oauth2/oauth2.c b/src/lib-oauth2/oauth2.c
new file mode 100644
index 0000000..b96995e
--- /dev/null
+++ b/src/lib-oauth2/oauth2.c
@@ -0,0 +1,41 @@
+/* Copyright (c) 2017-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "buffer.h"
+#include "istream.h"
+#include "json-tree.h"
+#include "oauth2.h"
+#include "oauth2-private.h"
+
+int oauth2_json_tree_build(const buffer_t *json, struct json_tree **tree_r,
+			   const char **error_r)
+{
+	struct istream *is = i_stream_create_from_buffer(json);
+	struct json_parser *parser = json_parser_init(is);
+	struct json_tree *tree = json_tree_init();
+	enum json_type type;
+	const char *value;
+	int ret;
+
+	while ((ret = json_parse_next(parser, &type, &value)) > 0) {
+		/* this is safe to reuse here because it gets rewritten in while
+		   loop */
+		ret = json_tree_append(tree, type, value);
+		i_assert(ret == 0);
+	}
+	i_assert(ret != 0);
+	ret = json_parser_deinit(&parser, error_r);
+	i_stream_unref(&is);
+	if (ret != 0)
+		json_tree_deinit(&tree);
+	else
+		*tree_r = tree;
+	return ret;
+}
+
+bool oauth2_valid_token(const char *token)
+{
+	if (token == NULL || *token == '\0' || strpbrk(token, "\r\n") != NULL)
+		return FALSE;
+	return TRUE;
+}