diff options
Diffstat (limited to 'libcurl/src/lib/smtp.c')
| -rw-r--r-- | libcurl/src/lib/smtp.c | 1671 |
1 files changed, 1671 insertions, 0 deletions
diff --git a/libcurl/src/lib/smtp.c b/libcurl/src/lib/smtp.c new file mode 100644 index 0000000..e827a0e --- /dev/null +++ b/libcurl/src/lib/smtp.c @@ -0,0 +1,1671 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * RFC1870 SMTP Service Extension for Message Size
+ * RFC2195 CRAM-MD5 authentication
+ * RFC2831 DIGEST-MD5 authentication
+ * RFC3207 SMTP over TLS
+ * RFC4422 Simple Authentication and Security Layer (SASL)
+ * RFC4616 PLAIN authentication
+ * RFC4752 The Kerberos V5 ("GSSAPI") SASL Mechanism
+ * RFC4954 SMTP Authentication
+ * RFC5321 SMTP protocol
+ * RFC6749 OAuth 2.0 Authorization Framework
+ * Draft SMTP URL Interface <draft-earhart-url-smtp-00.txt>
+ * Draft LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifndef CURL_DISABLE_SMTP
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UTSNAME_H
+#include <sys/utsname.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef __VMS
+#include <in.h>
+#include <inet.h>
+#endif
+
+#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
+#undef in_addr_t
+#define in_addr_t unsigned long
+#endif
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "sendf.h"
+#include "hostip.h"
+#include "progress.h"
+#include "transfer.h"
+#include "escape.h"
+#include "http.h" /* for HTTP proxy tunnel stuff */
+#include "socks.h"
+#include "smtp.h"
+
+#include "strtoofft.h"
+#include "strequal.h"
+#include "vtls/vtls.h"
+#include "connect.h"
+#include "strerror.h"
+#include "select.h"
+#include "multiif.h"
+#include "url.h"
+#include "rawstr.h"
+#include "curl_gethostname.h"
+#include "curl_sasl.h"
+#include "warnless.h"
+#include "curl_printf.h"
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/* Local API functions */
+static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done);
+static CURLcode smtp_do(struct connectdata *conn, bool *done);
+static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
+ bool premature);
+static CURLcode smtp_connect(struct connectdata *conn, bool *done);
+static CURLcode smtp_disconnect(struct connectdata *conn, bool dead);
+static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
+static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
+ int numsocks);
+static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done);
+static CURLcode smtp_setup_connection(struct connectdata *conn);
+static CURLcode smtp_parse_url_options(struct connectdata *conn);
+static CURLcode smtp_parse_url_path(struct connectdata *conn);
+static CURLcode smtp_parse_custom_request(struct connectdata *conn);
+static CURLcode smtp_perform_auth(struct connectdata *conn, const char *mech,
+ const char *initresp);
+static CURLcode smtp_continue_auth(struct connectdata *conn, const char *resp);
+static void smtp_get_message(char *buffer, char** outptr);
+
+/*
+ * SMTP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_smtp = {
+ "SMTP", /* scheme */
+ smtp_setup_connection, /* setup_connection */
+ smtp_do, /* do_it */
+ smtp_done, /* done */
+ ZERO_NULL, /* do_more */
+ smtp_connect, /* connect_it */
+ smtp_multi_statemach, /* connecting */
+ smtp_doing, /* doing */
+ smtp_getsock, /* proto_getsock */
+ smtp_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ smtp_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_SMTP, /* defport */
+ CURLPROTO_SMTP, /* protocol */
+ PROTOPT_CLOSEACTION | PROTOPT_NOURLQUERY /* flags */
+};
+
+#ifdef USE_SSL
+/*
+ * SMTPS protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_smtps = {
+ "SMTPS", /* scheme */
+ smtp_setup_connection, /* setup_connection */
+ smtp_do, /* do_it */
+ smtp_done, /* done */
+ ZERO_NULL, /* do_more */
+ smtp_connect, /* connect_it */
+ smtp_multi_statemach, /* connecting */
+ smtp_doing, /* doing */
+ smtp_getsock, /* proto_getsock */
+ smtp_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ smtp_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_SMTPS, /* defport */
+ CURLPROTO_SMTPS, /* protocol */
+ PROTOPT_CLOSEACTION | PROTOPT_SSL
+ | PROTOPT_NOURLQUERY /* flags */
+};
+#endif
+
+#ifndef CURL_DISABLE_HTTP
+/*
+ * HTTP-proxyed SMTP protocol handler.
+ */
+
+static const struct Curl_handler Curl_handler_smtp_proxy = {
+ "SMTP", /* scheme */
+ Curl_http_setup_conn, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ ZERO_NULL, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ ZERO_NULL, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ZERO_NULL, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_SMTP, /* defport */
+ CURLPROTO_HTTP, /* protocol */
+ PROTOPT_NONE /* flags */
+};
+
+#ifdef USE_SSL
+/*
+ * HTTP-proxyed SMTPS protocol handler.
+ */
+
+static const struct Curl_handler Curl_handler_smtps_proxy = {
+ "SMTPS", /* scheme */
+ Curl_http_setup_conn, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ ZERO_NULL, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ ZERO_NULL, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ZERO_NULL, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_SMTPS, /* defport */
+ CURLPROTO_HTTP, /* protocol */
+ PROTOPT_NONE /* flags */
+};
+#endif
+#endif
+
+/* SASL parameters for the smtp protocol */
+static const struct SASLproto saslsmtp = {
+ "smtp", /* The service name */
+ 334, /* Code received when continuation is expected */
+ 235, /* Code to receive upon authentication success */
+ 512 - 8, /* Maximum initial response length (no max) */
+ smtp_perform_auth, /* Send authentication command */
+ smtp_continue_auth, /* Send authentication continuation */
+ smtp_get_message /* Get SASL response message */
+};
+
+#ifdef USE_SSL
+static void smtp_to_smtps(struct connectdata *conn)
+{
+ conn->handler = &Curl_handler_smtps;
+}
+#else
+#define smtp_to_smtps(x) Curl_nop_stmt
+#endif
+
+/***********************************************************************
+ *
+ * smtp_endofresp()
+ *
+ * Checks for an ending SMTP status code at the start of the given string, but
+ * also detects various capabilities from the EHLO response including the
+ * supported authentication mechanisms.
+ */
+static bool smtp_endofresp(struct connectdata *conn, char *line, size_t len,
+ int *resp)
+{
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ bool result = FALSE;
+
+ /* Nothing for us */
+ if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
+ return FALSE;
+
+ /* Do we have a command response? This should be the response code followed
+ by a space and optionally some text as per RFC-5321 and as outlined in
+ Section 4. Examples of RFC-4954 but some e-mail servers ignore this and
+ only send the response code instead as per Section 4.2. */
+ if(line[3] == ' ' || len == 5) {
+ result = TRUE;
+ *resp = curlx_sltosi(strtol(line, NULL, 10));
+
+ /* Make sure real server never sends internal value */
+ if(*resp == 1)
+ *resp = 0;
+ }
+ /* Do we have a multiline (continuation) response? */
+ else if(line[3] == '-' &&
+ (smtpc->state == SMTP_EHLO || smtpc->state == SMTP_COMMAND)) {
+ result = TRUE;
+ *resp = 1; /* Internal response code */
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_get_message()
+ *
+ * Gets the authentication message from the response buffer.
+ */
+static void smtp_get_message(char *buffer, char** outptr)
+{
+ size_t len = 0;
+ char* message = NULL;
+
+ /* Find the start of the message */
+ for(message = buffer + 4; *message == ' ' || *message == '\t'; message++)
+ ;
+
+ /* Find the end of the message */
+ for(len = strlen(message); len--;)
+ if(message[len] != '\r' && message[len] != '\n' && message[len] != ' ' &&
+ message[len] != '\t')
+ break;
+
+ /* Terminate the message */
+ if(++len) {
+ message[len] = '\0';
+ }
+
+ *outptr = message;
+}
+
+/***********************************************************************
+ *
+ * state()
+ *
+ * This is the ONLY way to change SMTP state!
+ */
+static void state(struct connectdata *conn, smtpstate newstate)
+{
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ /* for debug purposes */
+ static const char * const names[] = {
+ "STOP",
+ "SERVERGREET",
+ "EHLO",
+ "HELO",
+ "STARTTLS",
+ "UPGRADETLS",
+ "AUTH",
+ "COMMAND",
+ "MAIL",
+ "RCPT",
+ "DATA",
+ "POSTDATA",
+ "QUIT",
+ /* LAST */
+ };
+
+ if(smtpc->state != newstate)
+ infof(conn->data, "SMTP %p state change from %s to %s\n",
+ (void *)smtpc, names[smtpc->state], names[newstate]);
+#endif
+
+ smtpc->state = newstate;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_ehlo()
+ *
+ * Sends the EHLO command to not only initialise communication with the ESMTP
+ * server but to also obtain a list of server side supported capabilities.
+ */
+static CURLcode smtp_perform_ehlo(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ smtpc->sasl.authmechs = SASL_AUTH_NONE; /* No known auth. mechanism yet */
+ smtpc->sasl.authused = SASL_AUTH_NONE; /* Clear the authentication mechanism
+ used for esmtp connections */
+ smtpc->tls_supported = FALSE; /* Clear the TLS capability */
+ smtpc->auth_supported = FALSE; /* Clear the AUTH capability */
+
+ /* Send the EHLO command */
+ result = Curl_pp_sendf(&smtpc->pp, "EHLO %s", smtpc->domain);
+
+ if(!result)
+ state(conn, SMTP_EHLO);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_helo()
+ *
+ * Sends the HELO command to initialise communication with the SMTP server.
+ */
+static CURLcode smtp_perform_helo(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ smtpc->sasl.authused = SASL_AUTH_NONE; /* No authentication mechanism used
+ in smtp connections */
+
+ /* Send the HELO command */
+ result = Curl_pp_sendf(&smtpc->pp, "HELO %s", smtpc->domain);
+
+ if(!result)
+ state(conn, SMTP_HELO);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_starttls()
+ *
+ * Sends the STLS command to start the upgrade to TLS.
+ */
+static CURLcode smtp_perform_starttls(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+
+ /* Send the STARTTLS command */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "STARTTLS");
+
+ if(!result)
+ state(conn, SMTP_STARTTLS);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_upgrade_tls()
+ *
+ * Performs the upgrade to TLS.
+ */
+static CURLcode smtp_perform_upgrade_tls(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ /* Start the SSL connection */
+ result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
+
+ if(!result) {
+ if(smtpc->state != SMTP_UPGRADETLS)
+ state(conn, SMTP_UPGRADETLS);
+
+ if(smtpc->ssldone) {
+ smtp_to_smtps(conn);
+ result = smtp_perform_ehlo(conn);
+ }
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_auth()
+ *
+ * Sends an AUTH command allowing the client to login with the given SASL
+ * authentication mechanism.
+ */
+static CURLcode smtp_perform_auth(struct connectdata *conn,
+ const char *mech,
+ const char *initresp)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ if(initresp) { /* AUTH <mech> ...<crlf> */
+ /* Send the AUTH command with the initial response */
+ result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
+ }
+ else {
+ /* Send the AUTH command */
+ result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_continue_auth()
+ *
+ * Sends SASL continuation data or cancellation.
+ */
+static CURLcode smtp_continue_auth(struct connectdata *conn, const char *resp)
+{
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ return Curl_pp_sendf(&smtpc->pp, "%s", resp);
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_authentication()
+ *
+ * Initiates the authentication sequence, with the appropriate SASL
+ * authentication mechanism.
+ */
+static CURLcode smtp_perform_authentication(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ saslprogress progress;
+
+ /* Check we have enough data to authenticate with, and the
+ server supports authentiation, and end the connect phase if not */
+ if(!smtpc->auth_supported ||
+ !Curl_sasl_can_authenticate(&smtpc->sasl, conn)) {
+ state(conn, SMTP_STOP);
+ return result;
+ }
+
+ /* Calculate the SASL login details */
+ result = Curl_sasl_start(&smtpc->sasl, conn, FALSE, &progress);
+
+ if(!result) {
+ if(progress == SASL_INPROGRESS)
+ state(conn, SMTP_AUTH);
+ else {
+ /* Other mechanisms not supported */
+ infof(conn->data, "No known authentication mechanisms supported!\n");
+ result = CURLE_LOGIN_DENIED;
+ }
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_command()
+ *
+ * Sends a SMTP based command.
+ */
+static CURLcode smtp_perform_command(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+
+ /* Send the command */
+ if(smtp->rcpt)
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s",
+ smtp->custom && smtp->custom[0] != '\0' ?
+ smtp->custom : "VRFY",
+ smtp->rcpt->data);
+ else
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s",
+ smtp->custom && smtp->custom[0] != '\0' ?
+ smtp->custom : "HELP");
+
+ if(!result)
+ state(conn, SMTP_COMMAND);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_mail()
+ *
+ * Sends an MAIL command to initiate the upload of a message.
+ */
+static CURLcode smtp_perform_mail(struct connectdata *conn)
+{
+ char *from = NULL;
+ char *auth = NULL;
+ char *size = NULL;
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ /* Calculate the FROM parameter */
+ if(!data->set.str[STRING_MAIL_FROM])
+ /* Null reverse-path, RFC-5321, sect. 3.6.3 */
+ from = strdup("<>");
+ else if(data->set.str[STRING_MAIL_FROM][0] == '<')
+ from = aprintf("%s", data->set.str[STRING_MAIL_FROM]);
+ else
+ from = aprintf("<%s>", data->set.str[STRING_MAIL_FROM]);
+
+ if(!from)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Calculate the optional AUTH parameter */
+ if(data->set.str[STRING_MAIL_AUTH] && conn->proto.smtpc.sasl.authused) {
+ if(data->set.str[STRING_MAIL_AUTH][0] != '\0')
+ auth = aprintf("%s", data->set.str[STRING_MAIL_AUTH]);
+ else
+ /* Empty AUTH, RFC-2554, sect. 5 */
+ auth = strdup("<>");
+
+ if(!auth) {
+ free(from);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+
+ /* Calculate the optional SIZE parameter */
+ if(conn->proto.smtpc.size_supported && conn->data->state.infilesize > 0) {
+ size = aprintf("%" CURL_FORMAT_CURL_OFF_T, data->state.infilesize);
+
+ if(!size) {
+ free(from);
+ free(auth);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+
+ /* Send the MAIL command */
+ if(!auth && !size)
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp,
+ "MAIL FROM:%s", from);
+ else if(auth && !size)
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp,
+ "MAIL FROM:%s AUTH=%s", from, auth);
+ else if(auth && size)
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp,
+ "MAIL FROM:%s AUTH=%s SIZE=%s", from, auth, size);
+ else
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp,
+ "MAIL FROM:%s SIZE=%s", from, size);
+
+ free(from);
+ free(auth);
+ free(size);
+
+ if(!result)
+ state(conn, SMTP_MAIL);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_rcpt_to()
+ *
+ * Sends a RCPT TO command for a given recipient as part of the message upload
+ * process.
+ */
+static CURLcode smtp_perform_rcpt_to(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+
+ /* Send the RCPT TO command */
+ if(smtp->rcpt->data[0] == '<')
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
+ smtp->rcpt->data);
+ else
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:<%s>",
+ smtp->rcpt->data);
+ if(!result)
+ state(conn, SMTP_RCPT);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform_quit()
+ *
+ * Performs the quit action prior to sclose() being called.
+ */
+static CURLcode smtp_perform_quit(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+
+ /* Send the QUIT command */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "QUIT");
+
+ if(!result)
+ state(conn, SMTP_QUIT);
+
+ return result;
+}
+
+/* For the initial server greeting */
+static CURLcode smtp_state_servergreet_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "Got unexpected smtp-server response: %d", smtpcode);
+ result = CURLE_FTP_WEIRD_SERVER_REPLY;
+ }
+ else
+ result = smtp_perform_ehlo(conn);
+
+ return result;
+}
+
+/* For STARTTLS responses */
+static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode != 220) {
+ if(data->set.use_ssl != CURLUSESSL_TRY) {
+ failf(data, "STARTTLS denied. %c", smtpcode);
+ result = CURLE_USE_SSL_FAILED;
+ }
+ else
+ result = smtp_perform_authentication(conn);
+ }
+ else
+ result = smtp_perform_upgrade_tls(conn);
+
+ return result;
+}
+
+/* For EHLO responses */
+static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ const char *line = data->state.buffer;
+ size_t len = strlen(line);
+ size_t wordlen;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2 && smtpcode != 1) {
+ if(data->set.use_ssl <= CURLUSESSL_TRY || conn->ssl[FIRSTSOCKET].use)
+ result = smtp_perform_helo(conn);
+ else {
+ failf(data, "Remote access denied: %d", smtpcode);
+ result = CURLE_REMOTE_ACCESS_DENIED;
+ }
+ }
+ else {
+ line += 4;
+ len -= 4;
+
+ /* Does the server support the STARTTLS capability? */
+ if(len >= 8 && !memcmp(line, "STARTTLS", 8))
+ smtpc->tls_supported = TRUE;
+
+ /* Does the server support the SIZE capability? */
+ else if(len >= 4 && !memcmp(line, "SIZE", 4))
+ smtpc->size_supported = TRUE;
+
+ /* Does the server support authentication? */
+ else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {
+ smtpc->auth_supported = TRUE;
+
+ /* Advance past the AUTH keyword */
+ line += 5;
+ len -= 5;
+
+ /* Loop through the data line */
+ for(;;) {
+ size_t llen;
+ unsigned int mechbit;
+
+ while(len &&
+ (*line == ' ' || *line == '\t' ||
+ *line == '\r' || *line == '\n')) {
+
+ line++;
+ len--;
+ }
+
+ if(!len)
+ break;
+
+ /* Extract the word */
+ for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
+ line[wordlen] != '\t' && line[wordlen] != '\r' &&
+ line[wordlen] != '\n';)
+ wordlen++;
+
+ /* Test the word for a matching authentication mechanism */
+ if((mechbit = Curl_sasl_decode_mech(line, wordlen, &llen)) &&
+ llen == wordlen)
+ smtpc->sasl.authmechs |= mechbit;
+
+ line += wordlen;
+ len -= wordlen;
+ }
+ }
+
+ if(smtpcode != 1) {
+ if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
+ /* We don't have a SSL/TLS connection yet, but SSL is requested */
+ if(smtpc->tls_supported)
+ /* Switch to TLS connection now */
+ result = smtp_perform_starttls(conn);
+ else if(data->set.use_ssl == CURLUSESSL_TRY)
+ /* Fallback and carry on with authentication */
+ result = smtp_perform_authentication(conn);
+ else {
+ failf(data, "STARTTLS not supported.");
+ result = CURLE_USE_SSL_FAILED;
+ }
+ }
+ else
+ result = smtp_perform_authentication(conn);
+ }
+ }
+
+ return result;
+}
+
+/* For HELO responses */
+static CURLcode smtp_state_helo_resp(struct connectdata *conn, int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "Remote access denied: %d", smtpcode);
+ result = CURLE_REMOTE_ACCESS_DENIED;
+ }
+ else
+ /* End of connect phase */
+ state(conn, SMTP_STOP);
+
+ return result;
+}
+
+/* For SASL authentication responses */
+static CURLcode smtp_state_auth_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ saslprogress progress;
+
+ (void)instate; /* no use for this yet */
+
+ result = Curl_sasl_continue(&smtpc->sasl, conn, smtpcode, &progress);
+ if(!result)
+ switch(progress) {
+ case SASL_DONE:
+ state(conn, SMTP_STOP); /* Authenticated */
+ break;
+ case SASL_IDLE: /* No mechanism left after cancellation */
+ failf(data, "Authentication cancelled");
+ result = CURLE_LOGIN_DENIED;
+ break;
+ default:
+ break;
+ }
+
+ return result;
+}
+
+/* For command responses */
+static CURLcode smtp_state_command_resp(struct connectdata *conn, int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+ char *line = data->state.buffer;
+ size_t len = strlen(line);
+
+ (void)instate; /* no use for this yet */
+
+ if((smtp->rcpt && smtpcode/100 != 2 && smtpcode != 553 && smtpcode != 1) ||
+ (!smtp->rcpt && smtpcode/100 != 2 && smtpcode != 1)) {
+ failf(data, "Command failed: %d", smtpcode);
+ result = CURLE_RECV_ERROR;
+ }
+ else {
+ /* Temporarily add the LF character back and send as body to the client */
+ if(!data->set.opt_no_body) {
+ line[len] = '\n';
+ result = Curl_client_write(conn, CLIENTWRITE_BODY, line, len + 1);
+ line[len] = '\0';
+ }
+
+ if(smtpcode != 1) {
+ if(smtp->rcpt) {
+ smtp->rcpt = smtp->rcpt->next;
+
+ if(smtp->rcpt) {
+ /* Send the next command */
+ result = smtp_perform_command(conn);
+ }
+ else
+ /* End of DO phase */
+ state(conn, SMTP_STOP);
+ }
+ else
+ /* End of DO phase */
+ state(conn, SMTP_STOP);
+ }
+ }
+
+ return result;
+}
+
+/* For MAIL responses */
+static CURLcode smtp_state_mail_resp(struct connectdata *conn, int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "MAIL failed: %d", smtpcode);
+ result = CURLE_SEND_ERROR;
+ }
+ else
+ /* Start the RCPT TO command */
+ result = smtp_perform_rcpt_to(conn);
+
+ return result;
+}
+
+/* For RCPT responses */
+static CURLcode smtp_state_rcpt_resp(struct connectdata *conn, int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode/100 != 2) {
+ failf(data, "RCPT failed: %d", smtpcode);
+ result = CURLE_SEND_ERROR;
+ }
+ else {
+ smtp->rcpt = smtp->rcpt->next;
+
+ if(smtp->rcpt)
+ /* Send the next RCPT TO command */
+ result = smtp_perform_rcpt_to(conn);
+ else {
+ /* Send the DATA command */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "DATA");
+
+ if(!result)
+ state(conn, SMTP_DATA);
+ }
+ }
+
+ return result;
+}
+
+/* For DATA response */
+static CURLcode smtp_state_data_resp(struct connectdata *conn, int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode != 354) {
+ failf(data, "DATA failed: %d", smtpcode);
+ result = CURLE_SEND_ERROR;
+ }
+ else {
+ /* Set the progress upload size */
+ Curl_pgrsSetUploadSize(data, data->state.infilesize);
+
+ /* SMTP upload */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
+
+ /* End of DO phase */
+ state(conn, SMTP_STOP);
+ }
+
+ return result;
+}
+
+/* For POSTDATA responses, which are received after the entire DATA
+ part has been sent to the server */
+static CURLcode smtp_state_postdata_resp(struct connectdata *conn,
+ int smtpcode,
+ smtpstate instate)
+{
+ CURLcode result = CURLE_OK;
+
+ (void)instate; /* no use for this yet */
+
+ if(smtpcode != 250)
+ result = CURLE_RECV_ERROR;
+
+ /* End of DONE phase */
+ state(conn, SMTP_STOP);
+
+ return result;
+}
+
+static CURLcode smtp_statemach_act(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ struct SessionHandle *data = conn->data;
+ int smtpcode;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ struct pingpong *pp = &smtpc->pp;
+ size_t nread = 0;
+
+ /* Busy upgrading the connection; right now all I/O is SSL/TLS, not SMTP */
+ if(smtpc->state == SMTP_UPGRADETLS)
+ return smtp_perform_upgrade_tls(conn);
+
+ /* Flush any data that needs to be sent */
+ if(pp->sendleft)
+ return Curl_pp_flushsend(pp);
+
+ do {
+ /* Read the response from the server */
+ result = Curl_pp_readresp(sock, pp, &smtpcode, &nread);
+ if(result)
+ return result;
+
+ /* Store the latest response for later retrieval if necessary */
+ if(smtpc->state != SMTP_QUIT && smtpcode != 1)
+ data->info.httpcode = smtpcode;
+
+ if(!smtpcode)
+ break;
+
+ /* We have now received a full SMTP server response */
+ switch(smtpc->state) {
+ case SMTP_SERVERGREET:
+ result = smtp_state_servergreet_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_EHLO:
+ result = smtp_state_ehlo_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_HELO:
+ result = smtp_state_helo_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_STARTTLS:
+ result = smtp_state_starttls_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_AUTH:
+ result = smtp_state_auth_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_COMMAND:
+ result = smtp_state_command_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_MAIL:
+ result = smtp_state_mail_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_RCPT:
+ result = smtp_state_rcpt_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_DATA:
+ result = smtp_state_data_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_POSTDATA:
+ result = smtp_state_postdata_resp(conn, smtpcode, smtpc->state);
+ break;
+
+ case SMTP_QUIT:
+ /* fallthrough, just stop! */
+ default:
+ /* internal error */
+ state(conn, SMTP_STOP);
+ break;
+ }
+ } while(!result && smtpc->state != SMTP_STOP && Curl_pp_moredata(pp));
+
+ return result;
+}
+
+/* Called repeatedly until done from multi.c */
+static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ if((conn->handler->flags & PROTOPT_SSL) && !smtpc->ssldone) {
+ result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
+ if(result || !smtpc->ssldone)
+ return result;
+ }
+
+ result = Curl_pp_statemach(&smtpc->pp, FALSE);
+ *done = (smtpc->state == SMTP_STOP) ? TRUE : FALSE;
+
+ return result;
+}
+
+static CURLcode smtp_block_statemach(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ while(smtpc->state != SMTP_STOP && !result)
+ result = Curl_pp_statemach(&smtpc->pp, TRUE);
+
+ return result;
+}
+
+/* Allocate and initialize the SMTP struct for the current SessionHandle if
+ required */
+static CURLcode smtp_init(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp;
+
+ smtp = data->req.protop = calloc(sizeof(struct SMTP), 1);
+ if(!smtp)
+ result = CURLE_OUT_OF_MEMORY;
+
+ return result;
+}
+
+/* For the SMTP "protocol connect" and "doing" phases only */
+static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
+ int numsocks)
+{
+ return Curl_pp_getsock(&conn->proto.smtpc.pp, socks, numsocks);
+}
+
+/***********************************************************************
+ *
+ * smtp_connect()
+ *
+ * This function should do everything that is to be considered a part of
+ * the connection phase.
+ *
+ * The variable pointed to by 'done' will be TRUE if the protocol-layer
+ * connect phase is done when this function returns, or FALSE if not.
+ */
+static CURLcode smtp_connect(struct connectdata *conn, bool *done)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ struct pingpong *pp = &smtpc->pp;
+
+ *done = FALSE; /* default to not done yet */
+
+ /* We always support persistent connections in SMTP */
+ connkeep(conn, "SMTP default");
+
+ /* Set the default response time-out */
+ pp->response_time = RESP_TIMEOUT;
+ pp->statemach_act = smtp_statemach_act;
+ pp->endofresp = smtp_endofresp;
+ pp->conn = conn;
+
+ /* Initialize the SASL storage */
+ Curl_sasl_init(&smtpc->sasl, &saslsmtp);
+
+ /* Initialise the pingpong layer */
+ Curl_pp_init(pp);
+
+ /* Parse the URL options */
+ result = smtp_parse_url_options(conn);
+ if(result)
+ return result;
+
+ /* Parse the URL path */
+ result = smtp_parse_url_path(conn);
+ if(result)
+ return result;
+
+ /* Start off waiting for the server greeting response */
+ state(conn, SMTP_SERVERGREET);
+
+ result = smtp_multi_statemach(conn, done);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_done()
+ *
+ * The DONE function. This does what needs to be done after a single DO has
+ * performed.
+ *
+ * Input argument is already checked for validity.
+ */
+static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
+ bool premature)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+ struct pingpong *pp = &conn->proto.smtpc.pp;
+ char *eob;
+ ssize_t len;
+ ssize_t bytes_written;
+
+ (void)premature;
+
+ if(!smtp || !pp->conn)
+ /* When the easy handle is removed from the multi interface while libcurl
+ is still trying to resolve the host name, the SMTP struct is not yet
+ initialized. However, the removal action calls Curl_done() which in
+ turn calls this function, so we simply return success. */
+ return CURLE_OK;
+
+ if(status) {
+ connclose(conn, "SMTP done with bad status"); /* marked for closure */
+ result = status; /* use the already set error code */
+ }
+ else if(!data->set.connect_only && data->set.upload && data->set.mail_rcpt) {
+ /* Calculate the EOB taking into account any terminating CRLF from the
+ previous line of the email or the CRLF of the DATA command when there
+ is "no mail data". RFC-5321, sect. 4.1.1.4.
+
+ Note: As some SSL backends, such as OpenSSL, will cause Curl_write() to
+ fail when using a different pointer following a previous write, that
+ returned CURLE_AGAIN, we duplicate the EOB now rather than when the
+ bytes written doesn't equal len. */
+ if(smtp->trailing_crlf || !conn->data->state.infilesize) {
+ eob = strdup(SMTP_EOB + 2);
+ len = SMTP_EOB_LEN - 2;
+ }
+ else {
+ eob = strdup(SMTP_EOB);
+ len = SMTP_EOB_LEN;
+ }
+
+ if(!eob)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Send the end of block data */
+ result = Curl_write(conn, conn->writesockfd, eob, len, &bytes_written);
+ if(result) {
+ free(eob);
+ return result;
+ }
+
+ if(bytes_written != len) {
+ /* The whole chunk was not sent so keep it around and adjust the
+ pingpong structure accordingly */
+ pp->sendthis = eob;
+ pp->sendsize = len;
+ pp->sendleft = len - bytes_written;
+ }
+ else {
+ /* Successfully sent so adjust the response timeout relative to now */
+ pp->response = Curl_tvnow();
+
+ free(eob);
+ }
+
+ state(conn, SMTP_POSTDATA);
+
+ /* Run the state-machine
+
+ TODO: when the multi interface is used, this _really_ should be using
+ the smtp_multi_statemach function but we have no general support for
+ non-blocking DONE operations, not in the multi state machine and with
+ Curl_done() invokes on several places in the code!
+ */
+ result = smtp_block_statemach(conn);
+ }
+
+ /* Cleanup our per-request based variables */
+ Curl_safefree(smtp->custom);
+
+ /* Clear the transfer mode for the next request */
+ smtp->transfer = FTPTRANSFER_BODY;
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_perform()
+ *
+ * This is the actual DO function for SMTP. Transfer a mail, send a command
+ * or get some data according to the options previously setup.
+ */
+static CURLcode smtp_perform(struct connectdata *conn, bool *connected,
+ bool *dophase_done)
+{
+ /* This is SMTP and no proxy */
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+
+ DEBUGF(infof(conn->data, "DO phase starts\n"));
+
+ if(data->set.opt_no_body) {
+ /* Requested no body means no transfer */
+ smtp->transfer = FTPTRANSFER_INFO;
+ }
+
+ *dophase_done = FALSE; /* not done yet */
+
+ /* Store the first recipient (or NULL if not specified) */
+ smtp->rcpt = data->set.mail_rcpt;
+
+ /* Start the first command in the DO phase */
+ if(data->set.upload && data->set.mail_rcpt)
+ /* MAIL transfer */
+ result = smtp_perform_mail(conn);
+ else
+ /* SMTP based command (VRFY, EXPN, NOOP, RSET or HELP) */
+ result = smtp_perform_command(conn);
+
+ if(result)
+ return result;
+
+ /* Run the state-machine */
+ result = smtp_multi_statemach(conn, dophase_done);
+
+ *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+ if(*dophase_done)
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_do()
+ *
+ * This function is registered as 'curl_do' function. It decodes the path
+ * parts etc as a wrapper to the actual DO function (smtp_perform).
+ *
+ * The input argument is already checked for validity.
+ */
+static CURLcode smtp_do(struct connectdata *conn, bool *done)
+{
+ CURLcode result = CURLE_OK;
+
+ *done = FALSE; /* default to false */
+
+ /* Parse the custom request */
+ result = smtp_parse_custom_request(conn);
+ if(result)
+ return result;
+
+ result = smtp_regular_transfer(conn, done);
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_disconnect()
+ *
+ * Disconnect from an SMTP server. Cleanup protocol-specific per-connection
+ * resources. BLOCKING.
+ */
+static CURLcode smtp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ /* We cannot send quit unconditionally. If this connection is stale or
+ bad in any way, sending quit and waiting around here will make the
+ disconnect wait in vain and cause more problems than we need to. */
+
+ /* The SMTP session may or may not have been allocated/setup at this
+ point! */
+ if(!dead_connection && smtpc->pp.conn && smtpc->pp.conn->bits.protoconnstart)
+ if(!smtp_perform_quit(conn))
+ (void)smtp_block_statemach(conn); /* ignore errors on QUIT */
+
+ /* Disconnect from the server */
+ Curl_pp_disconnect(&smtpc->pp);
+
+ /* Cleanup the SASL module */
+ Curl_sasl_cleanup(conn, smtpc->sasl.authused);
+
+ /* Cleanup our connection based variables */
+ Curl_safefree(smtpc->domain);
+
+ return CURLE_OK;
+}
+
+/* Call this when the DO phase has completed */
+static CURLcode smtp_dophase_done(struct connectdata *conn, bool connected)
+{
+ struct SMTP *smtp = conn->data->req.protop;
+
+ (void)connected;
+
+ if(smtp->transfer != FTPTRANSFER_BODY)
+ /* no data to transfer */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
+
+ return CURLE_OK;
+}
+
+/* Called from multi.c while DOing */
+static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done)
+{
+ CURLcode result = smtp_multi_statemach(conn, dophase_done);
+
+ if(result)
+ DEBUGF(infof(conn->data, "DO phase failed\n"));
+ else if(*dophase_done) {
+ result = smtp_dophase_done(conn, FALSE /* not connected */);
+
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_regular_transfer()
+ *
+ * The input argument is already checked for validity.
+ *
+ * Performs all commands done before a regular transfer between a local and a
+ * remote host.
+ */
+static CURLcode smtp_regular_transfer(struct connectdata *conn,
+ bool *dophase_done)
+{
+ CURLcode result = CURLE_OK;
+ bool connected = FALSE;
+ struct SessionHandle *data = conn->data;
+
+ /* Make sure size is unknown at this point */
+ data->req.size = -1;
+
+ /* Set the progress data */
+ Curl_pgrsSetUploadCounter(data, 0);
+ Curl_pgrsSetDownloadCounter(data, 0);
+ Curl_pgrsSetUploadSize(data, -1);
+ Curl_pgrsSetDownloadSize(data, -1);
+
+ /* Carry out the perform */
+ result = smtp_perform(conn, &connected, dophase_done);
+
+ /* Perform post DO phase operations if necessary */
+ if(!result && *dophase_done)
+ result = smtp_dophase_done(conn, connected);
+
+ return result;
+}
+
+static CURLcode smtp_setup_connection(struct connectdata *conn)
+{
+ struct SessionHandle *data = conn->data;
+ CURLcode result;
+
+ if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
+ /* Unless we have asked to tunnel SMTP operations through the proxy, we
+ switch and use HTTP operations only */
+#ifndef CURL_DISABLE_HTTP
+ if(conn->handler == &Curl_handler_smtp)
+ conn->handler = &Curl_handler_smtp_proxy;
+ else {
+#ifdef USE_SSL
+ conn->handler = &Curl_handler_smtps_proxy;
+#else
+ failf(data, "SMTPS not supported!");
+ return CURLE_UNSUPPORTED_PROTOCOL;
+#endif
+ }
+ /* set it up as a HTTP connection instead */
+ return conn->handler->setup_connection(conn);
+
+#else
+ failf(data, "SMTP over http proxy requires HTTP support built-in!");
+ return CURLE_UNSUPPORTED_PROTOCOL;
+#endif
+ }
+
+ /* Initialise the SMTP layer */
+ result = smtp_init(conn);
+ if(result)
+ return result;
+
+ data->state.path++; /* don't include the initial slash */
+
+ return CURLE_OK;
+}
+
+/***********************************************************************
+ *
+ * smtp_parse_url_options()
+ *
+ * Parse the URL login options.
+ */
+static CURLcode smtp_parse_url_options(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ const char *ptr = conn->options;
+
+ smtpc->sasl.resetprefs = TRUE;
+
+ while(!result && ptr && *ptr) {
+ const char *key = ptr;
+ const char *value;
+
+ while(*ptr && *ptr != '=')
+ ptr++;
+
+ value = ptr + 1;
+
+ while(*ptr && *ptr != ';')
+ ptr++;
+
+ if(strnequal(key, "AUTH=", 5))
+ result = Curl_sasl_parse_url_auth_option(&smtpc->sasl,
+ value, ptr - value);
+ else
+ result = CURLE_URL_MALFORMAT;
+
+ if(*ptr == ';')
+ ptr++;
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * smtp_parse_url_path()
+ *
+ * Parse the URL path into separate path components.
+ */
+static CURLcode smtp_parse_url_path(struct connectdata *conn)
+{
+ /* The SMTP struct is already initialised in smtp_connect() */
+ struct SessionHandle *data = conn->data;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+ const char *path = data->state.path;
+ char localhost[HOSTNAME_MAX + 1];
+
+ /* Calculate the path if necessary */
+ if(!*path) {
+ if(!Curl_gethostname(localhost, sizeof(localhost)))
+ path = localhost;
+ else
+ path = "localhost";
+ }
+
+ /* URL decode the path and use it as the domain in our EHLO */
+ return Curl_urldecode(conn->data, path, 0, &smtpc->domain, NULL, TRUE);
+}
+
+/***********************************************************************
+ *
+ * smtp_parse_custom_request()
+ *
+ * Parse the custom request.
+ */
+static CURLcode smtp_parse_custom_request(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+ const char *custom = data->set.str[STRING_CUSTOMREQUEST];
+
+ /* URL decode the custom request */
+ if(custom)
+ result = Curl_urldecode(data, custom, 0, &smtp->custom, NULL, TRUE);
+
+ return result;
+}
+
+CURL_STATIC CURLcode Curl_smtp_escape_eob(struct connectdata *conn, const ssize_t nread)
+{
+ /* When sending a SMTP payload we must detect CRLF. sequences making sure
+ they are sent as CRLF.. instead, as a . on the beginning of a line will
+ be deleted by the server when not part of an EOB terminator and a
+ genuine CRLF.CRLF which isn't escaped will wrongly be detected as end of
+ data by the server
+ */
+ ssize_t i;
+ ssize_t si;
+ struct SessionHandle *data = conn->data;
+ struct SMTP *smtp = data->req.protop;
+ char *scratch = data->state.scratch;
+ char *newscratch = NULL;
+ char *oldscratch = NULL;
+ size_t eob_sent;
+
+ /* Do we need to allocate a scratch buffer? */
+ if(!scratch || data->set.crlf) {
+ oldscratch = scratch;
+
+ scratch = newscratch = malloc(2 * BUFSIZE);
+ if(!newscratch) {
+ failf(data, "Failed to alloc scratch buffer!");
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+ }
+
+ /* Have we already sent part of the EOB? */
+ eob_sent = smtp->eob;
+
+ /* This loop can be improved by some kind of Boyer-Moore style of
+ approach but that is saved for later... */
+ for(i = 0, si = 0; i < nread; i++) {
+ if(SMTP_EOB[smtp->eob] == data->req.upload_fromhere[i]) {
+ smtp->eob++;
+
+ /* Is the EOB potentially the terminating CRLF? */
+ if(2 == smtp->eob || SMTP_EOB_LEN == smtp->eob)
+ smtp->trailing_crlf = TRUE;
+ else
+ smtp->trailing_crlf = FALSE;
+ }
+ else if(smtp->eob) {
+ /* A previous substring matched so output that first */
+ memcpy(&scratch[si], &SMTP_EOB[eob_sent], smtp->eob - eob_sent);
+ si += smtp->eob - eob_sent;
+
+ /* Then compare the first byte */
+ if(SMTP_EOB[0] == data->req.upload_fromhere[i])
+ smtp->eob = 1;
+ else
+ smtp->eob = 0;
+
+ eob_sent = 0;
+
+ /* Reset the trailing CRLF flag as there was more data */
+ smtp->trailing_crlf = FALSE;
+ }
+
+ /* Do we have a match for CRLF. as per RFC-5321, sect. 4.5.2 */
+ if(SMTP_EOB_FIND_LEN == smtp->eob) {
+ /* Copy the replacement data to the target buffer */
+ memcpy(&scratch[si], &SMTP_EOB_REPL[eob_sent],
+ SMTP_EOB_REPL_LEN - eob_sent);
+ si += SMTP_EOB_REPL_LEN - eob_sent;
+ smtp->eob = 0;
+ eob_sent = 0;
+ }
+ else if(!smtp->eob)
+ scratch[si++] = data->req.upload_fromhere[i];
+ }
+
+ if(smtp->eob - eob_sent) {
+ /* A substring matched before processing ended so output that now */
+ memcpy(&scratch[si], &SMTP_EOB[eob_sent], smtp->eob - eob_sent);
+ si += smtp->eob - eob_sent;
+ }
+
+ /* Only use the new buffer if we replaced something */
+ if(si != nread) {
+ /* Upload from the new (replaced) buffer instead */
+ data->req.upload_fromhere = scratch;
+
+ /* Save the buffer so it can be freed later */
+ data->state.scratch = scratch;
+
+ /* Free the old scratch buffer */
+ free(oldscratch);
+
+ /* Set the new amount too */
+ data->req.upload_present = si;
+ }
+ else
+ free(newscratch);
+
+ return CURLE_OK;
+}
+
+#endif /* CURL_DISABLE_SMTP */
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