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imap: Added support for the STARTTLS capability (Part Two)

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Added sending of initial CAPABILITY command before STARTTLS is sent.
This allows for the detection of the capability before trying to
upgrade the connection.
This commit is contained in:
Steve Holme 2013-02-10 15:41:56 +00:00
parent c76cb3da04
commit f6010d9a03
1 changed files with 29 additions and 20 deletions
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49
lib/imap.c
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@ -480,14 +480,7 @@ static CURLcode imap_state_capability(struct connectdata *conn)
imapc->authmechs = 0; /* No known authentication mechanisms yet */
imapc->authused = 0; /* Clear the authentication mechanism used */
/* 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, IMAP_STOP);
return result;
}
imapc->tls_supported = FALSE; /* Clear the TLS capability */
/* Send the CAPABILITY command */
result = imap_sendf(conn, "CAPABILITY");
@ -502,11 +495,19 @@ static CURLcode imap_state_capability(struct connectdata *conn)
static CURLcode imap_state_login(struct connectdata *conn)
{
CURLcode result;
CURLcode result = CURLE_OK;
struct FTP *imap = conn->data->state.proto.imap;
char *user = imap_atom(imap->user);
char *passwd = imap_atom(imap->passwd);
/* 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, IMAP_STOP);
return result;
}
/* Send USER and password */
result = imap_sendf(conn, "LOGIN %s %s", user ? user : "",
passwd ? passwd : "");
@ -532,6 +533,14 @@ static CURLcode imap_authenticate(struct connectdata *conn)
imapstate state1 = IMAP_STOP;
imapstate state2 = IMAP_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, IMAP_STOP);
return result;
}
/* Calculate the supported authentication mechanism by decreasing order of
security */
#ifndef CURL_DISABLE_CRYPTO_AUTH
@ -644,13 +653,7 @@ static CURLcode imap_state_servergreet_resp(struct connectdata *conn,
return CURLE_FTP_WEIRD_SERVER_REPLY;
}
if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
/* We don't have a SSL/TLS connection yet, but SSL is requested. Switch
to TLS connection now */
result = imap_state_starttls(conn);
}
else
result = imap_state_capability(conn);
result = imap_state_capability(conn);
return result;
}
@ -671,7 +674,7 @@ static CURLcode imap_state_starttls_resp(struct connectdata *conn,
result = CURLE_USE_SSL_FAILED;
}
else
result = imap_state_capability(conn);
result = imap_authenticate(conn);
}
else
result = imap_state_upgrade_tls(conn);
@ -705,13 +708,19 @@ static CURLcode imap_state_capability_resp(struct connectdata *conn,
imapstate instate)
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
(void)instate; /* no use for this yet */
if(imapcode == 'O')
result = imap_authenticate(conn);
else
if(imapcode != 'O')
result = imap_state_login(conn);
else if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
/* We don't have a SSL/TLS connection yet, but SSL is requested. Switch
to TLS connection now */
result = imap_state_starttls(conn);
}
else
result = imap_authenticate(conn);
return result;
}