1 files changed, 43 insertions, 0 deletions

diff --git a/src/authorization/iban.c b/src/authorization/iban.c
new file mode 100644
index 0000000..9547790
--- /dev/null
+++ b/src/authorization/iban.c
@@ -0,0 +1,43 @@
+/**
+ * Extract a numeric @a code from a @a wire_subject.
+ * Also checks that the @a wire_subject contains the
+ * string "anastasis".
+ *
+ * @param wire_subject wire subject to extract @a code from
+ * @param[out] code where to write the extracted code
+ * @return #GNUNET_OK if a @a code was extracted
+ */
+static enum GNUNET_GenericReturnValue
+extract_code (const char *wire_subject,
+              uint64_t *code)
+{
+  unsigned long long c;
+  const char *pos;
+
+  if (0 !=
+      strcasestr (wire_subject,
+                  "anastasis"))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "Keyword 'anastasis' missing in subject `%s', ignoring transfer\n",
+                wire_subject);
+    return GNUNET_SYSERR;
+  }
+  pos = wire_subject;
+  while ( ('\0' != *pos) &&
+          (! isdigit ((int) *pos)) )
+    pos++;
+  if (1 !=
+      sscanf (pos,
+              "%llu",
+              &c))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                "Did not find any code number in subject `%s', ignoring transfer\n",
+                wire_subject);
+    return GNUNET_SYSERR;
+  }
+
+  *code = (uint64_t) c;
+  return GNUNET_OK;
+}