/* for AUTH LOGIN (without initial response) responses */
static CURLcode smtp_state_authlogin_resp(struct connectdata *conn,
int smtpcode,
smtpstate instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
size_t l;
char * authuser;
(void)instate; /* no use for this yet */
if(smtpcode != 334) {
failf(data, "Access denied: %d", smtpcode);
result = CURLE_LOGIN_DENIED;
}
else {
l = smtp_auth_login_user(conn, &authuser);
if(!l)
result = CURLE_OUT_OF_MEMORY;
else {
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authuser);
free(authuser);
if(!result)
state(conn, SMTP_AUTHPASSWD);
}
}
return result;
}
static CURLcode smtp_authenticate(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct smtp_conn *smtpc = &conn->proto.smtpc;
char * initresp;
const char * mech;
size_t l;
smtpstate state1;
smtpstate state2;
if(!conn->bits.user_passwd)
state(conn, SMTP_STOP); /* End of connect phase. */
else {
initresp = (char *) NULL;
l = 1;
/* Check supported authentication mechanisms by decreasing order of
preference. */
mech = (const char *) NULL; /* Avoid compiler warnings. */
state1 = SMTP_STOP;
state2 = SMTP_STOP;
#ifndef CURL_DISABLE_CRYPTO_AUTH
if(smtpc->authmechs & SMTP_AUTH_CRAM_MD5) {
mech = "CRAM-MD5";
state1 = SMTP_AUTHCRAM;
}
else
#endif
if(smtpc->authmechs & SMTP_AUTH_PLAIN) {
mech = "PLAIN";
state1 = SMTP_AUTHPLAIN;
state2 = SMTP_AUTH;
l = smtp_auth_plain_data(conn, &initresp);
}
else if(smtpc->authmechs & SMTP_AUTH_LOGIN) {
mech = "LOGIN";
state1 = SMTP_AUTHLOGIN;
state2 = SMTP_AUTHPASSWD;
l = smtp_auth_login_user(conn, &initresp);
}
else
result = CURLE_LOGIN_DENIED; /* Other mechanisms not supported. */
if(!result) {
if(!l)
result = CURLE_OUT_OF_MEMORY;
else if(initresp &&
l + strlen(mech) <= 512 - 8) { /* AUTH <mech> ...<crlf> */
result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
free(initresp);
if(!result)
state(conn, state2);
}
else {
Curl_safefree(initresp);
result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
if(!result)
state(conn, state1);
}
}
}
return result;
}
static CURLcode smtp_authenticate(struct connectdata *conn)
{
CURLcode result = CURLE_OK;
struct smtp_conn *smtpc = &conn->proto.smtpc;
char *initresp = NULL;
const char *mech = NULL;
size_t len = 0;
smtpstate state1 = SMTP_STOP;
smtpstate state2 = SMTP_STOP;
/* Check we have a username and password to authenticate with and end the
connect phase if we don't. */
if(!conn->bits.user_passwd) {
state(conn, SMTP_STOP);
return result;
}
/* Check supported authentication mechanisms by decreasing order of
security. */
#ifndef CURL_DISABLE_CRYPTO_AUTH
if(smtpc->authmechs & SMTP_AUTH_CRAM_MD5) {
mech = "CRAM-MD5";
state1 = SMTP_AUTHCRAM;
smtpc->authused = SMTP_AUTH_CRAM_MD5;
}
else
#endif
#ifdef USE_NTLM
if(smtpc->authmechs & SMTP_AUTH_NTLM) {
mech = "NTLM";
state1 = SMTP_AUTHNTLM;
state2 = SMTP_AUTHNTLM_TYPE2MSG;
smtpc->authused = SMTP_AUTH_NTLM;
result = smtp_auth_ntlm_type1_message(conn, &initresp, &len);
}
else
#endif
if(smtpc->authmechs & SMTP_AUTH_LOGIN) {
mech = "LOGIN";
state1 = SMTP_AUTHLOGIN;
state2 = SMTP_AUTHPASSWD;
smtpc->authused = SMTP_AUTH_LOGIN;
result = smtp_auth_login_user(conn, &initresp, &len);
}
else if(smtpc->authmechs & SMTP_AUTH_PLAIN) {
mech = "PLAIN";
state1 = SMTP_AUTHPLAIN;
state2 = SMTP_AUTH;
smtpc->authused = SMTP_AUTH_PLAIN;
result = smtp_auth_plain_data(conn, &initresp, &len);
}
else {
infof(conn->data, "No known auth mechanisms supported!\n");
result = CURLE_LOGIN_DENIED; /* Other mechanisms not supported. */
}
if(!result) {
if(initresp &&
strlen(mech) + len <= 512 - 8) { /* AUTH <mech> ...<crlf> */
result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
if(!result)
state(conn, state2);
}
else {
result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
if(!result)
state(conn, state1);
}
Curl_safefree(initresp);
}
return result;
}
