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

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Added honoring of the tls_supported flag when starting a TLS upgrade
rather than unconditionally attempting it. If the use_ssl flag is set
to CURLUSESSL_TRY and the server doesn't support TLS upgrades then the
connection will continue to authenticate. If this flag is set to
CURLUSESSL_ALL then the connection will complete with a failure as it
did previously.
This commit is contained in:
Steve Holme 2013-02-10 19:53:49 +00:00
parent b333504327
commit b50ce1e5ba
1 changed files with 12 additions and 3 deletions
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13
lib/imap.c
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@ -709,15 +709,24 @@ static CURLcode imap_state_capability_resp(struct connectdata *conn,
{ {
CURLcode result = CURLE_OK; CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data; struct SessionHandle *data = conn->data;
struct imap_conn *imapc = &conn->proto.imapc;
(void)instate; /* no use for this yet */ (void)instate; /* no use for this yet */
if(imapcode != 'O') if(imapcode != 'O')
result = imap_state_login(conn); result = imap_state_login(conn);
else if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) { else if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
/* We don't have a SSL/TLS connection yet, but SSL is requested. Switch /* We don't have a SSL/TLS connection yet, but SSL is requested */
to TLS connection now */ if(imapc->tls_supported)
/* Switch to TLS connection now */
result = imap_state_starttls(conn); result = imap_state_starttls(conn);
else if(data->set.use_ssl == CURLUSESSL_TRY)
/* Fallback and carry on with authentication */
result = imap_authenticate(conn);
else {
failf(data, "STARTTLS not supported.");
result = CURLE_USE_SSL_FAILED;
}
} }
else else
result = imap_authenticate(conn); result = imap_authenticate(conn);