JSON: Add base64 helper functions

These functions are similar to the base64url helpers but with the base64
(not url) alphabet.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

src/utils/json.c

@@ -528,6 +528,28 @@ struct wpabuf * json_get_member_base64url(struct json_token *json,
 }
 
 
+struct wpabuf * json_get_member_base64(struct json_token *json,
+				       const char *name)
+{
+	struct json_token *token;
+	unsigned char *buf;
+	size_t buflen;
+	struct wpabuf *ret;
+
+	token = json_get_member(json, name);
+	if (!token || token->type != JSON_STRING)
+		return NULL;
+	buf = base64_decode(token->string, os_strlen(token->string), &buflen);
+	if (!buf)
+		return NULL;
+	ret = wpabuf_alloc_ext_data(buf, buflen);
+	if (!ret)
+		os_free(buf);
+
+	return ret;
+}
+
+
 static const char * json_type_str(enum json_type type)
 {
 	switch (type) {
@@ -620,6 +642,20 @@ int json_add_base64url(struct wpabuf *json, const char *name, const void *val,
 }
 
 
+int json_add_base64(struct wpabuf *json, const char *name, const void *val,
+		    size_t len)
+{
+	char *b64;
+
+	b64 = base64_encode_no_lf(val, len, NULL);
+	if (!b64)
+		return -1;
+	json_add_string(json, name, b64);
+	os_free(b64);
+	return 0;
+}
+
+
 void json_start_object(struct wpabuf *json, const char *name)
 {
 	if (name)

src/utils/json.h

@@ -37,6 +37,8 @@ void json_free(struct json_token *json);
 struct json_token * json_get_member(struct json_token *json, const char *name);
 struct wpabuf * json_get_member_base64url(struct json_token *json,
 					  const char *name);
+struct wpabuf * json_get_member_base64(struct json_token *json,
+				       const char *name);
 void json_print_tree(struct json_token *root, char *buf, size_t buflen);
 void json_add_int(struct wpabuf *json, const char *name, int val);
 void json_add_string(struct wpabuf *json, const char *name, const char *val);
@@ -44,6 +46,8 @@ int json_add_string_escape(struct wpabuf *json, const char *name,
 			   const void *val, size_t len);
 int json_add_base64url(struct wpabuf *json, const char *name, const void *val,
 		       size_t len);
+int json_add_base64(struct wpabuf *json, const char *name, const void *val,
+		    size_t len);
 void json_start_object(struct wpabuf *json, const char *name);
 void json_end_object(struct wpabuf *json);
 void json_start_array(struct wpabuf *json, const char *name);