int SMTP_quit(int sock, char smtp_mode)
/* send a "QUIT" message to the SMTP listener */
{
int ok;
SockPrintf(sock,"QUIT\r\n");
if (outlevel >= O_MONITOR)
report(stdout, "%cMTP> QUIT\n", smtp_mode);
ok = SMTP_ok(sock, smtp_mode, TIMEOUT_DEFAULT);
return ok;
}
/* XXX: this must not be used for LMTP! */
int SMTP_helo(int sock, char smtp_mode, const char *host)
/* send a "HELO" message to the SMTP listener */
{
int ok;
SockPrintf(sock,"HELO %s\r\n", host);
if (outlevel >= O_MONITOR)
report(stdout, "%cMTP> HELO %s\n", smtp_mode, host);
ok = SMTP_ok(sock, smtp_mode, TIMEOUT_HELO);
return ok;
}
int SMTP_data(int sock, char smtp_mode)
/* send a "DATA" message to the SMTP listener */
{
int ok;
SockPrintf(sock,"DATA\r\n");
if (outlevel >= O_MONITOR)
report(stdout, "%cMTP> DATA\n", smtp_mode);
ok = SMTP_ok(sock, smtp_mode, TIMEOUT_DATA);
return ok;
}
int SMTP_rcpt(int sock, char smtp_mode, const char *to)
/* send a "RCPT TO:" message to the SMTP listener */
{
int ok;
SockPrintf(sock,"RCPT TO:<%s>\r\n", to);
if (outlevel >= O_MONITOR)
report(stdout, "%cMTP> RCPT TO:<%s>\n", smtp_mode, to);
ok = SMTP_ok(sock, smtp_mode, TIMEOUT_RCPT);
return ok;
}
static int odmr_ok (int sock, char *argbuf)
/* parse command response */
{
int ok;
(void)argbuf;
ok = SMTP_ok(sock, SMTP_MODE, TIMEOUT_DEFAULT);
if (ok == SM_UNRECOVERABLE)
return(PS_PROTOCOL);
else
return(ok);
}
int SMTP_eom(int sock, char smtp_mode)
/* send a message data terminator to the SMTP listener */
{
SockPrintf(sock,".\r\n");
if (outlevel >= O_MONITOR)
report(stdout, "%cMTP>. (EOM)\n", smtp_mode);
/*
* When doing LMTP, must process many of these at the outer level.
*/
if (smtp_mode == 'S')
return SMTP_ok(sock, smtp_mode, TIMEOUT_EOM);
else
return SM_OK;
}
int SMTP_from(int sock, char smtp_mode, const char *from, const char *opts)
/* send a "MAIL FROM:" message to the SMTP listener */
{
int ok;
char buf[MSGBUFSIZE];
if (from[0]=='<')
snprintf(buf, sizeof(buf), "MAIL FROM:%s", from);
else
snprintf(buf, sizeof(buf), "MAIL FROM:<%s>", from);
if (opts)
snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%s", opts);
SockPrintf(sock,"%s\r\n", buf);
if (outlevel >= O_MONITOR)
report(stdout, "%cMTP> %s\n", smtp_mode, buf);
ok = SMTP_ok(sock, smtp_mode, TIMEOUT_MAIL);
return ok;
}
static void SMTP_auth(int sock, char smtp_mode, char *username, char *password, char *buf)
/* ESMTP Authentication support for fetchmail by Wojciech Polak */
{
int c;
char *p = 0;
char b64buf[512];
char tmp[512];
if (!username || !password) return;
memset(b64buf, 0, sizeof(b64buf));
memset(tmp, 0, sizeof(tmp));
if (strstr(buf, "CRAM-MD5")) {
unsigned char digest[16];
memset(digest, 0, sizeof(digest));
if (outlevel >= O_MONITOR)
report(stdout, GT_("ESMTP CRAM-MD5 Authentication...\n"));
SockPrintf(sock, "AUTH CRAM-MD5\r\n");
SockRead(sock, smtp_response, sizeof(smtp_response) - 1);
strlcpy(tmp, smtp_response, sizeof(tmp));
if (strncmp(tmp, "334", 3)) { /* Server rejects AUTH */
SMTP_auth_error(sock, GT_("Server rejected the AUTH command.\n"));
return;
}
p = strchr(tmp, ' ');
p++;
/* (hmh) from64tobits will not NULL-terminate strings! */
if (from64tobits(b64buf, p, sizeof(b64buf) - 1) <= 0) {
SMTP_auth_error(sock, GT_("Bad base64 reply from server.\n"));
return;
}
if (outlevel >= O_DEBUG)
report(stdout, GT_("Challenge decoded: %s\n"), b64buf);
hmac_md5((unsigned char *)password, strlen(password),
(unsigned char *)b64buf, strlen(b64buf), digest, sizeof(digest));
snprintf(tmp, sizeof(tmp),
"%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
username, digest[0], digest[1], digest[2], digest[3],
digest[4], digest[5], digest[6], digest[7], digest[8],
digest[9], digest[10], digest[11], digest[12], digest[13],
digest[14], digest[15]);
to64frombits(b64buf, tmp, strlen(tmp));
SockPrintf(sock, "%s\r\n", b64buf);
SMTP_ok(sock, smtp_mode, TIMEOUT_DEFAULT);
}
else if (strstr(buf, "PLAIN")) {
int len;
if (outlevel >= O_MONITOR)
report(stdout, GT_("ESMTP PLAIN Authentication...\n"));
snprintf(tmp, sizeof(tmp), "^%s^%s", username, password);
len = strlen(tmp);
for (c = len - 1; c >= 0; c--)
{
if (tmp[c] == '^')
tmp[c] = '\0';
}
to64frombits(b64buf, tmp, len);
SockPrintf(sock, "AUTH PLAIN %s\r\n", b64buf);
SMTP_ok(sock, smtp_mode, TIMEOUT_DEFAULT);
}
else if (strstr(buf, "LOGIN")) {
if (outlevel >= O_MONITOR)
report(stdout, GT_("ESMTP LOGIN Authentication...\n"));
SockPrintf(sock, "AUTH LOGIN\r\n");
SockRead(sock, smtp_response, sizeof(smtp_response) - 1);
strlcpy(tmp, smtp_response, sizeof(tmp));
if (strncmp(tmp, "334", 3)) { /* Server rejects AUTH */
SMTP_auth_error(sock, GT_("Server rejected the AUTH command.\n"));
return;
}
p = strchr(tmp, ' ');
p++;
if (from64tobits(b64buf, p, sizeof(b64buf) - 1) <= 0) {
SMTP_auth_error(sock, GT_("Bad base64 reply from server.\n"));
return;
}
to64frombits(b64buf, username, strlen(username));
SockPrintf(sock, "%s\r\n", b64buf);
SockRead(sock, smtp_response, sizeof(smtp_response) - 1);
strlcpy(tmp, smtp_response, sizeof(tmp));
p = strchr(tmp, ' ');
if (!p) {
SMTP_auth_error(sock, GT_("Bad base64 reply from server.\n"));
return;
}
p++;
memset(b64buf, 0, sizeof(b64buf));
if (from64tobits(b64buf, p, sizeof(b64buf) - 1) <= 0) {
SMTP_auth_error(sock, GT_("Bad base64 reply from server.\n"));
return;
}
to64frombits(b64buf, password, strlen(password));
SockPrintf(sock, "%s\r\n", b64buf);
SMTP_ok(sock, smtp_mode, TIMEOUT_DEFAULT);
}
return;
}
