pop3_apop.c
2.69 KB
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <mailutils/sys/pop3.h>
#include <mailutils/md5-rsa.h>
/*
APOP name digest
a string identifying a mailbox and a MD5 digest string (both required)
*/
int
pop3_apop (pop3_t pop3, const char *user, const char *secret)
{
int status = 0;
if (pop3 == NULL)
return MU_ERROR_INVALID_PARAMETER;
/* The server did not offer a time stamp in the greeting, bailout early. */
if (pop3->timestamp == NULL)
return MU_ERROR_NOT_SUPPORTED;
switch (pop3->state)
{
/* Generate the md5 from the secret and timestamp. */
case POP3_NO_STATE:
{
MD5_CTX md5context;
unsigned char md5digest[16];
char digest[64]; /* Really it just has to be 32 + 1(null). */
char *tmp;
size_t n;
if (user == NULL || secret == NULL)
return MU_ERROR_INVALID_PARAMETER;
MD5Init (&md5context);
MD5Update (&md5context, (unsigned char *)pop3->timestamp,
strlen (pop3->timestamp));
MD5Update (&md5context, (unsigned char *)secret, strlen (secret));
MD5Final (md5digest, &md5context);
for (tmp = digest, n = 0; n < 16; n++, tmp += 2)
sprintf (tmp, "%02x", md5digest[n]);
*tmp = '\0';
status = pop3_writeline (pop3, "APOP %s %s\r\n", user, digest);
POP3_CHECK_ERROR (pop3, status);
pop3->state = POP3_APOP;
}
case POP3_APOP:
status = pop3_send (pop3);
POP3_CHECK_EAGAIN (pop3, status);
pop3->acknowledge = 0;
pop3->state = POP3_APOP_ACK;
case POP3_APOP_ACK:
status = pop3_response (pop3, NULL, 0, NULL);
POP3_CHECK_EAGAIN (pop3, status);
POP3_CHECK_OK (pop3);
pop3->state = POP3_NO_STATE;
break;
/* They must deal with the error first by reopening. */
case POP3_ERROR:
status = MU_ERROR_OPERATION_CANCELED;
break;
default:
status = MU_ERROR_OPERATION_IN_PROGRESS;
}
return status;
}