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sendmail: support AUTH PLAIN in addition to AUTH LOGIN

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Implement the -am argument to allow choosing an AUTH method.
For now only PLAIN and LOGIN are supported, but others can be added
easily in the future.

AUTH PLAIN required adding a new variant of encode_base64() capable of
handling NUL characters in the input string; the old function is now a
wrapper for the newer one.

function                                             old     new   delta
encode_n_base64                                        -     236    +236
sendmail_main                                       1199    1380    +181
packed_usage                                       32873   32877      +4
encode_base64                                        242      36    -206
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/1 up/down: 421/-206)          Total: 215 bytes

Signed-off-by: Raffaello D. Di Napoli <rafdev@dinapo.li>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Raffaello D. Di Napoli
2018-06-26 19:17:45 -04:00
committed by Denys Vlasenko
parent c16ae469ef
commit f28b8857a9
3 changed files with 45 additions and 14 deletions
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18
mailutils/mail.c
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@@ -108,6 +108,17 @@ static char* FAST_FUNC parse_url(char *url, char **user, char **pass)
*/
void FAST_FUNC encode_base64(char *fname, const char *text, const char *eol)
{
size_t len = len;
if (text) {
// though we do not call uuencode(NULL, NULL) explicitly
// still we do not want to break things suddenly
len = strlen(text);
}
encode_n_base64(fname, text, len, eol);
}
void FAST_FUNC encode_n_base64(char *fname, const char *text, size_t len, const char *eol)
{
enum {
SRC_BUF_SIZE = 57, /* This *MUST* be a multiple of 3 */
@@ -116,17 +127,12 @@ void FAST_FUNC encode_base64(char *fname, const char *text, const char *eol)
#define src_buf text
char src[SRC_BUF_SIZE];
FILE *fp = fp;
ssize_t len = len;
char dst_buf[DST_BUF_SIZE + 1];
if (fname) {
fp = (NOT_LONE_DASH(fname)) ? xfopen_for_read(fname) : (FILE *)text;
src_buf = src;
} else if (text) {
// though we do not call uuencode(NULL, NULL) explicitly
// still we do not want to break things suddenly
len = strlen(text);
} else
} else if (!text)
return;
while (1) {