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-rw-r--r--src/global/verp_sender.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/global/verp_sender.c b/src/global/verp_sender.c
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+++ b/src/global/verp_sender.c
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+/*++
+/* NAME
+/* verp_sender 3
+/* SUMMARY
+/* quote local part of mailbox
+/* SYNOPSIS
+/* #include <verp_sender.h>
+/*
+/* VSTRING *verp_sender(dst, delims, sender, recipient)
+/* VSTRING *dst;
+/* const char *delims;
+/* const char *sender;
+/* const RECIPIENT *recipient;
+/*
+/* const char *verp_delims_verify(delims)
+/* const char *delims;
+/* DESCRIPTION
+/* verp_sender() encodes the recipient address in the sender
+/* address, using the specified delimiters. For example,
+/* with delims +=, sender \fIprefix@origin\fR, and
+/* recipient \fIuser@domain\fR the result is
+/* \fIprefix+user=domain@origin\fR.
+/*
+/* verp_delims_verify() determines if the specified VERP delimiters
+/* have reasonable values. What is reasonable is configured with
+/* the verp_delimiter_filter configuration parameter. The result
+/* is null in case of success, a description of the problem in
+/* case of error.
+/*
+/* Arguments:
+/* .IP dst
+/* The result. The buffer is null terminated.
+/* .IP delims
+/* VERP formatting characters.
+/* .IP sender
+/* Sender envelope address.
+/* .IP recipient
+/* Recipient envelope address.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <vstring.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <recipient_list.h>
+#include <verp_sender.h>
+
+/* verp_sender - encode recipient into envelope sender address */
+
+VSTRING *verp_sender(VSTRING *buf, const char *delimiters,
+ const char *sender, const RECIPIENT *rcpt_info)
+{
+ ssize_t send_local_len;
+ ssize_t rcpt_local_len;
+ const char *recipient;
+ const char *cp;
+
+ /*
+ * Change prefix@origin into prefix+user=domain@origin.
+ *
+ * Fix 20090115: Use the Postfix original recipient, because that is what
+ * the VERP consumer expects.
+ */
+ send_local_len = ((cp = strrchr(sender, '@')) != 0 ?
+ cp - sender : strlen(sender));
+ recipient = (rcpt_info->orig_addr[0] ?
+ rcpt_info->orig_addr : rcpt_info->address);
+ rcpt_local_len = ((cp = strrchr(recipient, '@')) != 0 ?
+ cp - recipient : strlen(recipient));
+ vstring_strncpy(buf, sender, send_local_len);
+ VSTRING_ADDCH(buf, delimiters[0] & 0xff);
+ vstring_strncat(buf, recipient, rcpt_local_len);
+ if (recipient[rcpt_local_len] && recipient[rcpt_local_len + 1]) {
+ VSTRING_ADDCH(buf, delimiters[1] & 0xff);
+ vstring_strcat(buf, recipient + rcpt_local_len + 1);
+ }
+ if (sender[send_local_len] && sender[send_local_len + 1]) {
+ VSTRING_ADDCH(buf, '@');
+ vstring_strcat(buf, sender + send_local_len + 1);
+ }
+ VSTRING_TERMINATE(buf);
+ return (buf);
+}
+
+/* verp_delims_verify - sanitize VERP delimiters */
+
+const char *verp_delims_verify(const char *delims)
+{
+ if (strlen(delims) != 2)
+ return ("bad VERP delimiter character count");
+ if (strchr(var_verp_filter, delims[0]) == 0)
+ return ("bad first VERP delimiter character");
+ if (strchr(var_verp_filter, delims[1]) == 0)
+ return ("bad second VERP delimiter character");
+ return (0);
+}