exchange

commit b0348f83a30bbc8578c76ca9e157bf556705d3e6
parent ed02edd8e2e906c1ef25a15ea382f97e1d30aaf3
Author: Christian Grothoff <christian@grothoff.org>
Date:   Tue,  4 Aug 2026 18:40:29 +0200

enable use of '=' in slugs, we need it for the session_id

Diffstat:
M
src/include/taler/taler_util.h
 | 
3
++-
M
src/util/util.c
 | 
6
+++++-

2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/include/taler/taler_util.h b/src/include/taler/taler_util.h
@@ -484,7 +484,8 @@ TALER_url_is_reserved (char c);
  *   - Hyphen: -
  *   - Underscore: _
  *   - Period: .
- *   - Tilde: ~
+ *   - Colon: :
+ *   - Equals: = (needed for base64-encoded identifiers)
  *
  * Additional restrictions:
  *   - must not be empty
diff --git a/src/util/util.c b/src/util/util.c
@@ -500,7 +500,11 @@ TALER_is_slug (const char *slug)
     case '_':
     case '.':
     case ':':
-      /* Note: could also allow '~' in principle, is on safe list! */
+    case '=':
+      /* Note: '=' is needed as base64-encoded identifiers (such as
+         the Paivana IDs used as merchant session IDs) may end in
+         padding.  Note: could also allow '~' in principle, is on
+         safe list! */
       continue;
     default:
       return false;