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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /src/global/midna_adomain.c
parentInitial commit. (diff)
downloadpostfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.tar.xz
postfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/global/midna_adomain.c')
-rw-r--r--src/global/midna_adomain.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/src/global/midna_adomain.c b/src/global/midna_adomain.c
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+/*++
+/* NAME
+/* midna_adomain 3
+/* SUMMARY
+/* address domain part conversion
+/* SYNOPSIS
+/* #include <midna_adomain.h>
+/*
+/* char *midna_adomain_to_ascii(
+/* VSTRING *dest,
+/* const char *name)
+/*
+/* char *midna_adomain_to_utf8(
+/* VSTRING *dest,
+/* const char *name)
+/* DESCRIPTION
+/* The functions in this module transform the domain portion
+/* of an email address between ASCII and UTF-8 form. Both
+/* functions tolerate a missing domain, and both functions
+/* return a copy of the input when the domain portion requires
+/* no conversion.
+/*
+/* midna_adomain_to_ascii() converts an UTF-8 or ASCII domain
+/* portion to ASCII. The result is a null pointer when
+/* conversion fails. This function verifies that the resulting
+/* domain passes valid_hostname().
+/*
+/* midna_adomain_to_utf8() converts an UTF-8 or ASCII domain
+/* name to UTF-8. The result is a null pointer when conversion
+/* fails. This function verifies that the resulting domain,
+/* after conversion to ASCII, passes valid_hostname().
+/* SEE ALSO
+/* midna_domain(3), Postfix ASCII/UTF-8 domain name conversion
+/* DIAGNOSTICS
+/* Fatal errors: memory allocation problem.
+/* Warnings: conversion error or result validation error.
+/* 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>
+
+#ifndef NO_EAI
+#include <unicode/uidna.h>
+
+ /*
+ * Utility library.
+ */
+#include <vstring.h>
+#include <stringops.h>
+#include <midna_domain.h>
+
+ /*
+ * Global library.
+ */
+#include <midna_adomain.h>
+
+#define STR(x) vstring_str(x)
+
+/* midna_adomain_to_utf8 - convert address domain portion to UTF8 */
+
+char *midna_adomain_to_utf8(VSTRING *dest, const char *src)
+{
+ const char *cp;
+ const char *domain_utf8;
+
+ if ((cp = strrchr(src, '@')) == 0) {
+ vstring_strcpy(dest, src);
+ } else {
+ vstring_sprintf(dest, "%*s@", (int) (cp - src), src);
+ if (*(cp += 1)) {
+ if (allascii(cp) && strstr(cp, "--") == 0) {
+ vstring_strcat(dest, cp);
+ } else if ((domain_utf8 = midna_domain_to_utf8(cp)) == 0) {
+ return (0);
+ } else {
+ vstring_strcat(dest, domain_utf8);
+ }
+ }
+ }
+ return (STR(dest));
+}
+
+/* midna_adomain_to_ascii - convert address domain portion to ASCII */
+
+char *midna_adomain_to_ascii(VSTRING *dest, const char *src)
+{
+ const char *cp;
+ const char *domain_ascii;
+
+ if ((cp = strrchr(src, '@')) == 0) {
+ vstring_strcpy(dest, src);
+ } else {
+ vstring_sprintf(dest, "%*s@", (int) (cp - src), src);
+ if (*(cp += 1)) {
+ if (allascii(cp)) {
+ vstring_strcat(dest, cp);
+ } else if ((domain_ascii = midna_domain_to_ascii(cp + 1)) == 0) {
+ return (0);
+ } else {
+ vstring_strcat(dest, domain_ascii);
+ }
+ }
+ }
+ return (STR(dest));
+}
+
+#endif /* NO_IDNA */