Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 179 insertions, 0 deletions

diff --git a/src/global/quote_821_local.c b/src/global/quote_821_local.c
new file mode 100644
index 0000000..8cd9b2e
--- /dev/null
+++ b/src/global/quote_821_local.c
@@ -0,0 +1,179 @@
+/*++
+/* NAME
+/*	quote_821_local 3
+/* SUMMARY
+/*	quote local part of address
+/* SYNOPSIS
+/*	#include "quote_821_local.h"
+/*
+/*	VSTRING	*quote_821_local(dst, src)
+/*	VSTRING	*dst;
+/*	char	*src;
+/*
+/*	VSTRING	*quote_821_local_flags(dst, src, flags)
+/*	VSTRING	*dst;
+/*	const char *src;
+/*	int	flags;
+/* DESCRIPTION
+/*	quote_821_local() quotes the local part of a mailbox address and
+/*	returns a result that can be used in SMTP commands as specified
+/*	by RFC 821. It implements an 8-bit clean version of RFC 821.
+/*
+/*	quote_821_local_flags() provides finer control.
+/*
+/*	Arguments:
+/* .IP dst
+/*	The result.
+/* .IP src
+/*	The input address.
+/* .IP flags
+/*	Bit-wise OR of zero or more of the following.
+/* .RS
+/* .IP QUOTE_FLAG_8BITCLEAN
+/*	In violation with RFCs, treat 8-bit text as ordinary text.
+/* .IP QUOTE_FLAG_EXPOSE_AT
+/*	In violation with RFCs, treat `@' as an ordinary character.
+/* .IP QUOTE_FLAG_APPEND
+/*	Append to the result buffer, instead of overwriting it.
+/* .RE
+/* STANDARDS
+/*	RFC 821 (SMTP protocol)
+/* BUGS
+/*	The code assumes that the domain is RFC 821 clean.
+/* 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>
+#include <ctype.h>
+
+/* Utility library. */
+
+#include <vstring.h>
+
+/* Global library. */
+
+#include "quote_821_local.h"
+
+/* Application-specific. */
+
+#define YES	1
+#define	NO	0
+
+/* is_821_dot_string - is this local-part an rfc 821 dot-string? */
+
+static int is_821_dot_string(const char *local_part, const char *end, int flags)
+{
+    const char *cp;
+    int     ch;
+
+    /*
+     * Detect any deviations from the definition of dot-string. We could use
+     * lookup tables to speed up some of the work, but hey, how large can a
+     * local-part be anyway?
+     */
+    if (local_part == end || local_part[0] == 0 || local_part[0] == '.')
+	return (NO);
+    for (cp = local_part; cp < end && (ch = *(unsigned char *) cp) != 0; cp++) {
+	if (ch == '.' && cp[1] == '.')
+	    return (NO);
+	if (ch > 127 && !(flags & QUOTE_FLAG_8BITCLEAN))
+	    return (NO);
+	if (ch == ' ')
+	    return (NO);
+	if (ISCNTRL(ch))
+	    return (NO);
+	if (ch == '<' || ch == '>'
+	    || ch == '(' || ch == ')'
+	    || ch == '[' || ch == ']'
+	    || ch == '\\' || ch == ','
+	    || ch == ';' || ch == ':'
+	    || (ch == '@' && !(flags & QUOTE_FLAG_EXPOSE_AT)) || ch == '"')
+	    return (NO);
+    }
+    if (cp[-1] == '.')
+	return (NO);
+    return (YES);
+}
+
+/* make_821_quoted_string - make quoted-string from local-part */
+
+static VSTRING *make_821_quoted_string(VSTRING *dst, const char *local_part,
+				               const char *end, int flags)
+{
+    const char *cp;
+    int     ch;
+
+    /*
+     * Put quotes around the result, and prepend a backslash to characters
+     * that need quoting when they occur in a quoted-string.
+     */
+    VSTRING_ADDCH(dst, '"');
+    for (cp = local_part; cp < end && (ch = *(unsigned char *) cp) != 0; cp++) {
+	if ((ch > 127 && !(flags & QUOTE_FLAG_8BITCLEAN))
+	    || ch == '\r' || ch == '\n' || ch == '"' || ch == '\\')
+	    VSTRING_ADDCH(dst, '\\');
+	VSTRING_ADDCH(dst, ch);
+    }
+    VSTRING_ADDCH(dst, '"');
+    VSTRING_TERMINATE(dst);
+    return (dst);
+}
+
+/* quote_821_local_flags - quote local part of address according to rfc 821 */
+
+VSTRING *quote_821_local_flags(VSTRING *dst, const char *addr, int flags)
+{
+    const char   *at;
+
+    /*
+     * According to RFC 821, a local-part is a dot-string or a quoted-string.
+     * We first see if the local-part is a dot-string. If it is not, we turn
+     * it into a quoted-string. Anything else would be too painful.
+     */
+    if ((at = strrchr(addr, '@')) == 0)		/* just in case */
+	at = addr + strlen(addr);		/* should not happen */
+    if ((flags & QUOTE_FLAG_APPEND) == 0)
+	VSTRING_RESET(dst);
+    if (is_821_dot_string(addr, at, flags)) {
+	return (vstring_strcat(dst, addr));
+    } else {
+	make_821_quoted_string(dst, addr, at, flags & QUOTE_FLAG_8BITCLEAN);
+	return (vstring_strcat(dst, at));
+    }
+}
+
+#ifdef TEST
+
+ /*
+  * Test program for local-part quoting as per rfc 821
+  */
+#include <stdlib.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+#include "quote_821_local.h"
+
+int     main(void)
+{
+    VSTRING *src = vstring_alloc(100);
+    VSTRING *dst = vstring_alloc(100);
+
+    while (vstring_fgets_nonl(src, VSTREAM_IN)) {
+	vstream_fprintf(VSTREAM_OUT, "%s\n",
+			vstring_str(quote_821_local(dst, vstring_str(src))));
+	vstream_fflush(VSTREAM_OUT);
+    }
+    exit(0);
+}
+
+#endif