taler-typescript-core

commit 71e938bd96d0d0a8b1954a48cb1bd9e7d93a1e56
parent f6dfe4ce296e0cee3fa2f319eedbd695f6fc2320
Author: Florian Dold <dold@taler.net>
Date:   Tue, 21 Jul 2026 10:52:38 +0200

util: match the payto scheme and target type case-insensitively

The C compares the prefix with strncasecmp and the method with strcasecmp,
so payto://IBAN/... is a URI the exchange accepts; parsing it here failed
with WRONG_PREFIX or UNSUPPORTED.

Diffstat:
M
packages/taler-util/src/payto.ts
 | 
12
+++++++-----

1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/packages/taler-util/src/payto.ts b/packages/taler-util/src/payto.ts
@@ -613,7 +613,9 @@ export namespace Paytos {
     | ResultError<PaytoParseError.COMPONENTS_LENGTH, { targetType: PaytoType }>
     | ResultError<PaytoParseError.INVALID_TARGET_PATH, TargetPathErrorDetail>
     | ResultError<PaytoParseError.INCOMPLETE, { targetType: string }> {
-    if (!s.startsWith(PAYTO_PREFIX)) {
+    // The scheme and the target type are case insensitive, as in the C
+    // reference (strncasecmp on the prefix, strcasecmp on the method).
+    if (s.slice(0, PAYTO_PREFIX.length).toLowerCase() !== PAYTO_PREFIX) {
       return Result.error(PaytoParseError.WRONG_PREFIX);
     }
 
@@ -625,9 +627,9 @@ export namespace Paytos {
 
     const firstSlashPos = acct.indexOf("/");
 
-    const targetType = (
-      firstSlashPos === -1 ? acct : acct.slice(0, firstSlashPos)
-    ) as PaytoType;
+    const rawTargetType =
+      firstSlashPos === -1 ? acct : acct.slice(0, firstSlashPos);
+    const targetType = rawTargetType.toLowerCase() as PaytoType;
     if (
       !opts.allowUnsupported &&
       !Object.prototype.hasOwnProperty.call(supportedTargets, targetType)
@@ -862,7 +864,7 @@ export namespace Paytos {
       default: {
         if (opts.allowUnsupported) {
           return Result.of<URI>(
-            createUnsupported(targetType, targetPath, params),
+            createUnsupported(rawTargetType, targetPath, params),
           );
         }
         assertUnreachable(targetType);