* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2014, 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
* RFC4954 SMTP Authentication
* RFC5321 SMTP protocol
* RFC6749 OAuth 2.0 Authorization Framework
- * Draft SMTP URL Interface
+ * Draft SMTP URL Interface <draft-earhart-url-smtp-00.txt>
+ * Draft LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>
*
***************************************************************************/
#include "strtoofft.h"
#include "strequal.h"
-#include "sslgen.h"
+#include "vtls/vtls.h"
#include "connect.h"
#include "strerror.h"
#include "select.h"
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_calc_sasl_details(struct connectdata *conn,
+ const char **mech,
+ char **initresp, size_t *len,
+ smtpstate *state1, smtpstate *state2);
/*
* SMTP protocol handler.
smtp_disconnect, /* disconnect */
ZERO_NULL, /* readwrite */
PORT_SMTPS, /* defport */
- CURLPROTO_SMTP | CURLPROTO_SMTPS, /* protocol */
+ CURLPROTO_SMTPS, /* protocol */
PROTOPT_CLOSEACTION | PROTOPT_SSL
| PROTOPT_NOURLQUERY /* flags */
};
/***********************************************************************
*
- * pop3_endofresp()
+ * 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
{
struct smtp_conn *smtpc = &conn->proto.smtpc;
bool result = FALSE;
- size_t wordlen;
+ /* Nothing for us */
if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
- return FALSE; /* Nothing for us */
+ 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. */
- result = (line[3] == ' ' || len == 5) ? TRUE : FALSE;
- if(result)
+ 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));
- /* Are we processing EHLO command data? */
- if(smtpc->state == SMTP_EHLO && (!result || (result && *resp/100 == 2))) {
- 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;
-
- /* Do we have the authentication mechanism list? */
- else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {
- line += 5;
- len -= 5;
-
- /* Loop through the data line */
- for(;;) {
- while(len &&
- (*line == ' ' || *line == '\t' ||
- *line == '\r' || *line == '\n')) {
+ /* 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 */
+ }
- line++;
- len--;
- }
+ return result;
+}
- if(!len)
- break;
+/***********************************************************************
+ *
+ * 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;
- /* Extract the word */
- for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
- line[wordlen] != '\t' && line[wordlen] != '\r' &&
- line[wordlen] != '\n';)
- wordlen++;
+ /* Find the start of the message */
+ for(message = buffer + 4; *message == ' ' || *message == '\t'; message++)
+ ;
- /* Test the word for a matching authentication mechanism */
- if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_LOGIN))
- smtpc->authmechs |= SASL_MECH_LOGIN;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_PLAIN))
- smtpc->authmechs |= SASL_MECH_PLAIN;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_CRAM_MD5))
- smtpc->authmechs |= SASL_MECH_CRAM_MD5;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_DIGEST_MD5))
- smtpc->authmechs |= SASL_MECH_DIGEST_MD5;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_GSSAPI))
- smtpc->authmechs |= SASL_MECH_GSSAPI;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_EXTERNAL))
- smtpc->authmechs |= SASL_MECH_EXTERNAL;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_NTLM))
- smtpc->authmechs |= SASL_MECH_NTLM;
- else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_XOAUTH2))
- smtpc->authmechs |= SASL_MECH_XOAUTH2;
+ /* Find the end of the message */
+ for(len = strlen(message); len--;)
+ if(message[len] != '\r' && message[len] != '\n' && message[len] != ' ' &&
+ message[len] != '\t')
+ break;
- line += wordlen;
- len -= wordlen;
- }
- }
+ /* Terminate the message */
+ if(++len) {
+ message[len] = '\0';
}
- return result;
+ *outptr = message;
}
/***********************************************************************
"AUTH_NTLM",
"AUTH_NTLM_TYPE2MSG",
"AUTH_XOAUTH2",
+ "AUTH_CANCEL",
"AUTH_FINAL",
+ "COMMAND",
"MAIL",
"RCPT",
"DATA",
CURLcode result = CURLE_OK;
struct smtp_conn *smtpc = &conn->proto.smtpc;
- smtpc->authmechs = 0; /* No known authentication mechanisms yet */
- smtpc->authused = 0; /* Clear the authentication mechanism used
- for esmtp connections */
- smtpc->tls_supported = FALSE; /* Clear the TLS capability */
+ smtpc->authmechs = 0; /* No known authentication mechanisms yet */
+ smtpc->authused = 0; /* 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);
/***********************************************************************
*
- * smtp_perform_authenticate()
+ * smtp_perform_auth()
*
- * Sends an AUTH command allowing the client to login with the appropriate
- * SASL authentication mechanism.
+ * Sends an AUTH command allowing the client to login with the given SASL
+ * authentication mechanism.
*/
-static CURLcode smtp_perform_authenticate(struct connectdata *conn)
+static CURLcode smtp_perform_auth(struct connectdata *conn,
+ const char *mech,
+ const char *initresp, size_t len,
+ smtpstate state1, smtpstate state2)
+{
+ CURLcode result = CURLE_OK;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ if(initresp && 8 + strlen(mech) + len <= 512) { /* AUTH <mech> ...<crlf> */
+ /* Send the AUTH command with the initial response */
+ result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
+
+ if(!result)
+ state(conn, state2);
+ }
+ else {
+ /* Send the AUTH command */
+ result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
+
+ if(!result)
+ state(conn, state1);
+ }
+
+ return result;
+}
+
+/***********************************************************************
+ *
+ * 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 SessionHandle *data = conn->data;
struct smtp_conn *smtpc = &conn->proto.smtpc;
const char *mech = NULL;
char *initresp = NULL;
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) {
+ /* Check we have a username and password to authenticate with, and the
+ server supports authentiation, and end the connect phase if not */
+ if(!conn->bits.user_passwd || !smtpc->auth_supported) {
state(conn, SMTP_STOP);
return result;
}
- /* Calculate the supported authentication mechanism, by decreasing order of
- security, as well as the initial response where appropriate */
-#ifndef CURL_DISABLE_CRYPTO_AUTH
- if((smtpc->authmechs & SASL_MECH_DIGEST_MD5) &&
- (smtpc->prefmech & SASL_MECH_DIGEST_MD5)) {
- mech = SASL_MECH_STRING_DIGEST_MD5;
- state1 = SMTP_AUTH_DIGESTMD5;
- smtpc->authused = SASL_MECH_DIGEST_MD5;
- }
- else if((smtpc->authmechs & SASL_MECH_CRAM_MD5) &&
- (smtpc->prefmech & SASL_MECH_CRAM_MD5)) {
- mech = SASL_MECH_STRING_CRAM_MD5;
- state1 = SMTP_AUTH_CRAMMD5;
- smtpc->authused = SASL_MECH_CRAM_MD5;
- }
- else
-#endif
-#ifdef USE_NTLM
- if((smtpc->authmechs & SASL_MECH_NTLM) &&
- (smtpc->prefmech & SASL_MECH_NTLM)) {
- mech = SASL_MECH_STRING_NTLM;
- state1 = SMTP_AUTH_NTLM;
- state2 = SMTP_AUTH_NTLM_TYPE2MSG;
- smtpc->authused = SASL_MECH_NTLM;
-
- if(data->set.sasl_ir)
- result = Curl_sasl_create_ntlm_type1_message(conn->user, conn->passwd,
- &conn->ntlm,
- &initresp, &len);
- }
- else
-#endif
- if(((smtpc->authmechs & SASL_MECH_XOAUTH2) &&
- (smtpc->prefmech & SASL_MECH_XOAUTH2) &&
- (smtpc->prefmech != SASL_AUTH_ANY)) || conn->xoauth2_bearer) {
- mech = SASL_MECH_STRING_XOAUTH2;
- state1 = SMTP_AUTH_XOAUTH2;
- state2 = SMTP_AUTH_FINAL;
- smtpc->authused = SASL_MECH_XOAUTH2;
-
- if(data->set.sasl_ir)
- result = Curl_sasl_create_xoauth2_message(conn->data, conn->user,
- conn->xoauth2_bearer,
- &initresp, &len);
- }
- else if((smtpc->authmechs & SASL_MECH_LOGIN) &&
- (smtpc->prefmech & SASL_MECH_LOGIN)) {
- mech = SASL_MECH_STRING_LOGIN;
- state1 = SMTP_AUTH_LOGIN;
- state2 = SMTP_AUTH_LOGIN_PASSWD;
- smtpc->authused = SASL_MECH_LOGIN;
-
- if(data->set.sasl_ir)
- result = Curl_sasl_create_login_message(conn->data, conn->user,
- &initresp, &len);
- }
- else if((smtpc->authmechs & SASL_MECH_PLAIN) &&
- (smtpc->prefmech & SASL_MECH_PLAIN)) {
- mech = SASL_MECH_STRING_PLAIN;
- state1 = SMTP_AUTH_PLAIN;
- state2 = SMTP_AUTH_FINAL;
- smtpc->authused = SASL_MECH_PLAIN;
-
- if(data->set.sasl_ir)
- result = Curl_sasl_create_plain_message(conn->data, conn->user,
- conn->passwd, &initresp, &len);
- }
+ /* Calculate the SASL login details */
+ result = smtp_calc_sasl_details(conn, &mech, &initresp, &len, &state1,
+ &state2);
if(!result) {
if(mech) {
/* Perform SASL based authentication */
- if(initresp &&
- 8 + strlen(mech) + len <= 512) { /* 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);
- }
+ result = smtp_perform_auth(conn, mech, initresp, len, state1, state2);
Curl_safefree(initresp);
}
/***********************************************************************
*
+ * 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.
}
/* Calculate the optional SIZE parameter */
- if(conn->proto.smtpc.size_supported && conn->data->set.infilesize > 0) {
- size = aprintf("%" FORMAT_OFF_T, data->set.infilesize);
+ if(conn->proto.smtpc.size_supported && conn->data->state.infilesize > 0) {
+ size = aprintf("%" CURL_FORMAT_CURL_OFF_T, data->state.infilesize);
if(!size) {
Curl_safefree(from);
struct SMTP *smtp = data->req.protop;
/* Send the RCPT TO command */
- if(smtp->rcpt) {
- 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);
- }
+ 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;
}
result = CURLE_USE_SSL_FAILED;
}
else
- result = smtp_perform_authenticate(conn);
+ result = smtp_perform_authentication(conn);
}
else
result = smtp_perform_upgrade_tls(conn);
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) {
- if((data->set.use_ssl <= CURLUSESSL_TRY || conn->ssl[FIRSTSOCKET].use) &&
- !conn->bits.user_passwd)
+ 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 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_authenticate(conn);
- else {
- failf(data, "STARTTLS not supported.");
- result = CURLE_USE_SSL_FAILED;
+ 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(;;) {
+ 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(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_LOGIN))
+ smtpc->authmechs |= SASL_MECH_LOGIN;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_PLAIN))
+ smtpc->authmechs |= SASL_MECH_PLAIN;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_CRAM_MD5))
+ smtpc->authmechs |= SASL_MECH_CRAM_MD5;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_DIGEST_MD5))
+ smtpc->authmechs |= SASL_MECH_DIGEST_MD5;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_GSSAPI))
+ smtpc->authmechs |= SASL_MECH_GSSAPI;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_EXTERNAL))
+ smtpc->authmechs |= SASL_MECH_EXTERNAL;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_NTLM))
+ smtpc->authmechs |= SASL_MECH_NTLM;
+ else if(sasl_mech_equal(line, wordlen, SASL_MECH_STRING_XOAUTH2))
+ smtpc->authmechs |= SASL_MECH_XOAUTH2;
+
+ 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);
}
}
- else
- result = smtp_perform_authenticate(conn);
return result;
}
/* Create the authorisation message */
result = Curl_sasl_create_plain_message(conn->data, conn->user,
conn->passwd, &plainauth, &len);
+ if(!result && plainauth) {
+ /* Send the message */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", plainauth);
- /* Send the message */
- if(!result) {
- if(plainauth) {
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", plainauth);
-
- if(!result)
- state(conn, SMTP_AUTH_FINAL);
- }
-
- Curl_safefree(plainauth);
+ if(!result)
+ state(conn, SMTP_AUTH_FINAL);
}
}
+ Curl_safefree(plainauth);
+
return result;
}
/* Create the user message */
result = Curl_sasl_create_login_message(conn->data, conn->user,
&authuser, &len);
+ if(!result && authuser) {
+ /* Send the user */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authuser);
- /* Send the user */
- if(!result) {
- if(authuser) {
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authuser);
-
- if(!result)
- state(conn, SMTP_AUTH_LOGIN_PASSWD);
- }
-
- Curl_safefree(authuser);
+ if(!result)
+ state(conn, SMTP_AUTH_LOGIN_PASSWD);
}
}
+ Curl_safefree(authuser);
+
return result;
}
/* Create the password message */
result = Curl_sasl_create_login_message(conn->data, conn->passwd,
&authpasswd, &len);
+ if(!result && authpasswd) {
+ /* Send the password */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authpasswd);
- /* Send the password */
- if(!result) {
- if(authpasswd) {
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", authpasswd);
-
- if(!result)
- state(conn, SMTP_AUTH_FINAL);
- }
-
- Curl_safefree(authpasswd);
+ if(!result)
+ state(conn, SMTP_AUTH_FINAL);
}
}
+ Curl_safefree(authpasswd);
+
return result;
}
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
- char *chlg64 = data->state.buffer;
- size_t len = 0;
+ char *chlg = NULL;
+ char *chlg64 = NULL;
char *rplyb64 = NULL;
+ size_t len = 0;
(void)instate; /* no use for this yet */
return CURLE_LOGIN_DENIED;
}
- /* Get the challenge */
- for(chlg64 += 4; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
- ;
+ /* Get the challenge message */
+ smtp_get_message(data->state.buffer, &chlg64);
- /* Terminate the challenge */
- if(*chlg64 != '=') {
- for(len = strlen(chlg64); len--;)
- if(chlg64[len] != '\r' && chlg64[len] != '\n' && chlg64[len] != ' ' &&
- chlg64[len] != '\t')
- break;
+ /* Decode the challenge message */
+ result = Curl_sasl_decode_cram_md5_message(chlg64, &chlg, &len);
+ if(result) {
+ /* Send the cancellation */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "*");
- if(++len) {
- chlg64[len] = '\0';
- }
+ if(!result)
+ state(conn, SMTP_AUTH_CANCEL);
}
-
- /* Create the response message */
- result = Curl_sasl_create_cram_md5_message(data, chlg64, conn->user,
- conn->passwd, &rplyb64, &len);
-
- /* Send the response */
- if(!result) {
- if(rplyb64) {
+ else {
+ /* Create the response message */
+ result = Curl_sasl_create_cram_md5_message(data, chlg, conn->user,
+ conn->passwd, &rplyb64, &len);
+ if(!result && rplyb64) {
+ /* Send the response */
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", rplyb64);
if(!result)
state(conn, SMTP_AUTH_FINAL);
}
-
- Curl_safefree(rplyb64);
}
+ Curl_safefree(chlg);
+ Curl_safefree(rplyb64);
+
return result;
}
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
- char *chlg64 = data->state.buffer;
- size_t len = 0;
+ char *chlg64 = NULL;
char *rplyb64 = NULL;
+ size_t len = 0;
(void)instate; /* no use for this yet */
return CURLE_LOGIN_DENIED;
}
- /* Get the challenge */
- for(chlg64 += 4; *chlg64 == ' ' || *chlg64 == '\t'; chlg64++)
- ;
+ /* Get the challenge message */
+ smtp_get_message(data->state.buffer, &chlg64);
/* Create the response message */
- result = Curl_sasl_create_digest_md5_message(data, chlg64, conn->user,
- conn->passwd, "smtp",
- &rplyb64, &len);
-
- /* Send the response */
- if(!result) {
- if(rplyb64) {
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", rplyb64);
+ result = Curl_sasl_create_digest_md5_message(data, chlg64,
+ conn->user, conn->passwd,
+ "smtp", &rplyb64, &len);
+ if(result) {
+ if(result == CURLE_BAD_CONTENT_ENCODING) {
+ /* Send the cancellation */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "*");
if(!result)
- state(conn, SMTP_AUTH_DIGESTMD5_RESP);
+ state(conn, SMTP_AUTH_CANCEL);
}
+ }
+ else {
+ /* Send the response */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", rplyb64);
- Curl_safefree(rplyb64);
+ if(!result)
+ state(conn, SMTP_AUTH_DIGESTMD5_RESP);
}
+ Curl_safefree(rplyb64);
+
return result;
}
result = Curl_sasl_create_ntlm_type1_message(conn->user, conn->passwd,
&conn->ntlm,
&type1msg, &len);
+ if(!result && type1msg) {
+ /* Send the message */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", type1msg);
- /* Send the message */
- if(!result) {
- if(type1msg) {
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", type1msg);
-
- if(!result)
- state(conn, SMTP_AUTH_NTLM_TYPE2MSG);
- }
-
- Curl_safefree(type1msg);
+ if(!result)
+ state(conn, SMTP_AUTH_NTLM_TYPE2MSG);
}
}
+ Curl_safefree(type1msg);
+
return result;
}
{
CURLcode result = CURLE_OK;
struct SessionHandle *data = conn->data;
+ char *type2msg = NULL;
char *type3msg = NULL;
size_t len = 0;
result = CURLE_LOGIN_DENIED;
}
else {
- /* Create the type-3 message */
- result = Curl_sasl_create_ntlm_type3_message(data,
- data->state.buffer + 4,
- conn->user, conn->passwd,
- &conn->ntlm,
- &type3msg, &len);
+ /* Get the type-2 message */
+ smtp_get_message(data->state.buffer, &type2msg);
- /* Send the message */
- if(!result) {
- if(type3msg) {
+ /* Decode the type-2 message */
+ result = Curl_sasl_decode_ntlm_type2_message(data, type2msg, &conn->ntlm);
+ if(result) {
+ /* Send the cancellation */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "*");
+
+ if(!result)
+ state(conn, SMTP_AUTH_CANCEL);
+ }
+ else {
+ /* Create the type-3 message */
+ result = Curl_sasl_create_ntlm_type3_message(data, conn->user,
+ conn->passwd, &conn->ntlm,
+ &type3msg, &len);
+ if(!result && type3msg) {
+ /* Send the message */
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", type3msg);
if(!result)
state(conn, SMTP_AUTH_FINAL);
}
-
- Curl_safefree(type3msg);
}
}
+ Curl_safefree(type3msg);
+
return result;
}
#endif
result = Curl_sasl_create_xoauth2_message(conn->data, conn->user,
conn->xoauth2_bearer,
&xoauth, &len);
+ if(!result && xoauth) {
+ /* Send the message */
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", xoauth);
- /* Send the message */
- if(!result) {
- if(xoauth) {
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", xoauth);
+ if(!result)
+ state(conn, SMTP_AUTH_FINAL);
+ }
+ }
- if(!result)
- state(conn, SMTP_AUTH_FINAL);
- }
+ Curl_safefree(xoauth);
+
+ return result;
+}
- Curl_safefree(xoauth);
+/* For AUTH cancellation responses */
+static CURLcode smtp_state_auth_cancel_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 *mech = NULL;
+ char *initresp = NULL;
+ size_t len = 0;
+ smtpstate state1 = SMTP_STOP;
+ smtpstate state2 = SMTP_STOP;
+
+ (void)smtpcode;
+ (void)instate; /* no use for this yet */
+
+ /* Remove the offending mechanism from the supported list */
+ smtpc->authmechs ^= smtpc->authused;
+
+ /* Calculate alternative SASL login details */
+ result = smtp_calc_sasl_details(conn, &mech, &initresp, &len, &state1,
+ &state2);
+
+ if(!result) {
+ /* Do we have any mechanisms left? */
+ if(mech) {
+ /* Retry SASL based authentication */
+ result = smtp_perform_auth(conn, mech, initresp, len, state1, state2);
+
+ Curl_safefree(initresp);
+ }
+ else {
+ failf(data, "Authentication cancelled");
+
+ result = CURLE_LOGIN_DENIED;
}
}
return result;
}
-/* For the final responses to the AUTH sequence */
+/* For final responses in the AUTH sequence */
static CURLcode smtp_state_auth_final_resp(struct connectdata *conn,
int smtpcode,
smtpstate instate)
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;
- struct SMTP *smtp = data->req.protop;
(void)instate; /* no use for this yet */
if(smtpcode/100 != 2) {
failf(data, "MAIL failed: %d", smtpcode);
result = CURLE_SEND_ERROR;
- state(conn, SMTP_STOP);
}
- else {
- smtp->rcpt = data->set.mail_rcpt;
-
+ else
+ /* Start the RCPT TO command */
result = smtp_perform_rcpt_to(conn);
- }
return result;
}
if(smtpcode/100 != 2) {
failf(data, "RCPT failed: %d", smtpcode);
result = CURLE_SEND_ERROR;
- state(conn, SMTP_STOP);
}
else {
- if(smtp->rcpt) {
- smtp->rcpt = smtp->rcpt->next;
+ 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 we failed or still are sending RCPT data then return */
- if(result || smtp->rcpt)
- return result;
+ if(!result)
+ state(conn, SMTP_DATA);
}
-
- /* Send the DATA command */
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "DATA");
-
- if(!result)
- state(conn, SMTP_DATA);
}
return result;
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) {
- state(conn, SMTP_STOP);
- return CURLE_SEND_ERROR;
+ failf(data, "DATA failed: %d", smtpcode);
+ result = CURLE_SEND_ERROR;
}
+ else {
+ /* Set the progress upload size */
+ Curl_pgrsSetUploadSize(data, data->state.infilesize);
- /* Set the progress upload size */
- Curl_pgrsSetUploadSize(data, data->set.infilesize);
-
- /* SMTP upload */
- Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
+ /* SMTP upload */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
- /* End of DO phase */
- state(conn, SMTP_STOP);
+ /* End of DO phase */
+ state(conn, SMTP_STOP);
+ }
- return CURLE_OK;
+ return result;
}
/* For POSTDATA responses, which are received after the entire DATA
if(pp->sendleft)
return Curl_pp_flushsend(pp);
- /* Read the response from the server */
- result = Curl_pp_readresp(sock, pp, &smtpcode, &nread);
- if(result)
- return result;
+ 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;
- /* Store the latest response for later retrieval */
- if(smtpc->state != SMTP_QUIT)
- data->info.httpcode = smtpcode;
+ if(!smtpcode)
+ break;
- if(smtpcode) {
/* We have now received a full SMTP server response */
switch(smtpc->state) {
case SMTP_SERVERGREET:
result = smtp_state_auth_xoauth2_resp(conn, smtpcode, smtpc->state);
break;
+ case SMTP_AUTH_CANCEL:
+ result = smtp_state_auth_cancel_resp(conn, smtpcode, smtpc->state);
+ break;
+
case SMTP_AUTH_FINAL:
result = smtp_state_auth_final_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;
state(conn, SMTP_STOP);
break;
}
- }
+ } while(!result && smtpc->state != SMTP_STOP && Curl_pp_moredata(pp));
return result;
}
*done = FALSE; /* default to not done yet */
/* We always support persistent connections in SMTP */
- conn->bits.close = FALSE;
+ connkeep(conn, "SMTP default");
/* Set the default response time-out */
pp->response_time = RESP_TIMEOUT;
return CURLE_OK;
if(status) {
- conn->bits.close = TRUE; /* marked for closure */
+ connclose(conn, "SMTP done with bad status"); /* marked for closure */
result = status; /* use the already set error code */
}
- else if(!data->set.connect_only) {
+ 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. */
eob = SMTP_EOB;
len = SMTP_EOB_LEN;
- if(smtp->trailing_crlf || !conn->data->set.infilesize) {
+ if(smtp->trailing_crlf || !conn->data->state.infilesize) {
eob += 2;
len -= 2;
}
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;
*
* smtp_perform()
*
- * This is the actual DO function for SMTP. Send a mail according to the
- * options previously setup.
+ * 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(conn->data->set.opt_no_body) {
+ if(data->set.opt_no_body) {
/* Requested no body means no transfer */
- struct SMTP *smtp = conn->data->req.protop;
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 */
- result = smtp_perform_mail(conn);
+ 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 */
+ /* Run the state-machine */
result = smtp_multi_statemach(conn, dophase_done);
*connected = conn->bits.tcpconnect[FIRSTSOCKET];
*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;
struct smtp_conn *smtpc = &conn->proto.smtpc;
const char *options = conn->options;
const char *ptr = options;
+ bool reset = TRUE;
- if(options) {
+ while(ptr && *ptr) {
const char *key = ptr;
while(*ptr && *ptr != '=')
ptr++;
if(strnequal(key, "AUTH", 4)) {
- const char *value = ptr + 1;
+ size_t len = 0;
+ const char *value = ++ptr;
- if(strequal(value, "*"))
- smtpc->prefmech = SASL_AUTH_ANY;
- else if(strequal(value, SASL_MECH_STRING_LOGIN))
- smtpc->prefmech = SASL_MECH_LOGIN;
- else if(strequal(value, SASL_MECH_STRING_PLAIN))
- smtpc->prefmech = SASL_MECH_PLAIN;
- else if(strequal(value, SASL_MECH_STRING_CRAM_MD5))
- smtpc->prefmech = SASL_MECH_CRAM_MD5;
- else if(strequal(value, SASL_MECH_STRING_DIGEST_MD5))
- smtpc->prefmech = SASL_MECH_DIGEST_MD5;
- else if(strequal(value, SASL_MECH_STRING_GSSAPI))
- smtpc->prefmech = SASL_MECH_GSSAPI;
- else if(strequal(value, SASL_MECH_STRING_NTLM))
- smtpc->prefmech = SASL_MECH_NTLM;
- else if(strequal(value, SASL_MECH_STRING_XOAUTH2))
- smtpc->prefmech = SASL_MECH_XOAUTH2;
- else
+ if(reset) {
+ reset = FALSE;
smtpc->prefmech = SASL_AUTH_NONE;
+ }
+
+ while(*ptr && *ptr != ';') {
+ ptr++;
+ len++;
+ }
+
+ if(strnequal(value, "*", len))
+ smtpc->prefmech = SASL_AUTH_ANY;
+ else if(strnequal(value, SASL_MECH_STRING_LOGIN, len))
+ smtpc->prefmech |= SASL_MECH_LOGIN;
+ else if(strnequal(value, SASL_MECH_STRING_PLAIN, len))
+ smtpc->prefmech |= SASL_MECH_PLAIN;
+ else if(strnequal(value, SASL_MECH_STRING_CRAM_MD5, len))
+ smtpc->prefmech |= SASL_MECH_CRAM_MD5;
+ else if(strnequal(value, SASL_MECH_STRING_DIGEST_MD5, len))
+ smtpc->prefmech |= SASL_MECH_DIGEST_MD5;
+ else if(strnequal(value, SASL_MECH_STRING_GSSAPI, len))
+ smtpc->prefmech |= SASL_MECH_GSSAPI;
+ else if(strnequal(value, SASL_MECH_STRING_NTLM, len))
+ smtpc->prefmech |= SASL_MECH_NTLM;
+ else if(strnequal(value, SASL_MECH_STRING_XOAUTH2, len))
+ smtpc->prefmech |= SASL_MECH_XOAUTH2;
+
+ if(*ptr == ';')
+ ptr++;
}
else
result = CURLE_URL_MALFORMAT;
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;
+}
+
+/***********************************************************************
+ *
+ * smtp_calc_sasl_details()
+ *
+ * Calculate the required login details for SASL authentication.
+ */
+static CURLcode smtp_calc_sasl_details(struct connectdata *conn,
+ const char **mech,
+ char **initresp, size_t *len,
+ smtpstate *state1, smtpstate *state2)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct smtp_conn *smtpc = &conn->proto.smtpc;
+
+ /* Calculate the supported authentication mechanism, by decreasing order of
+ security, as well as the initial response where appropriate */
+#ifndef CURL_DISABLE_CRYPTO_AUTH
+ if((smtpc->authmechs & SASL_MECH_DIGEST_MD5) &&
+ (smtpc->prefmech & SASL_MECH_DIGEST_MD5)) {
+ *mech = SASL_MECH_STRING_DIGEST_MD5;
+ *state1 = SMTP_AUTH_DIGESTMD5;
+ smtpc->authused = SASL_MECH_DIGEST_MD5;
+ }
+ else if((smtpc->authmechs & SASL_MECH_CRAM_MD5) &&
+ (smtpc->prefmech & SASL_MECH_CRAM_MD5)) {
+ *mech = SASL_MECH_STRING_CRAM_MD5;
+ *state1 = SMTP_AUTH_CRAMMD5;
+ smtpc->authused = SASL_MECH_CRAM_MD5;
+ }
+ else
+#endif
+#ifdef USE_NTLM
+ if((smtpc->authmechs & SASL_MECH_NTLM) &&
+ (smtpc->prefmech & SASL_MECH_NTLM)) {
+ *mech = SASL_MECH_STRING_NTLM;
+ *state1 = SMTP_AUTH_NTLM;
+ *state2 = SMTP_AUTH_NTLM_TYPE2MSG;
+ smtpc->authused = SASL_MECH_NTLM;
+
+ if(data->set.sasl_ir)
+ result = Curl_sasl_create_ntlm_type1_message(conn->user, conn->passwd,
+ &conn->ntlm,
+ initresp, len);
+ }
+ else
+#endif
+ if(((smtpc->authmechs & SASL_MECH_XOAUTH2) &&
+ (smtpc->prefmech & SASL_MECH_XOAUTH2) &&
+ (smtpc->prefmech != SASL_AUTH_ANY)) || conn->xoauth2_bearer) {
+ *mech = SASL_MECH_STRING_XOAUTH2;
+ *state1 = SMTP_AUTH_XOAUTH2;
+ *state2 = SMTP_AUTH_FINAL;
+ smtpc->authused = SASL_MECH_XOAUTH2;
+
+ if(data->set.sasl_ir)
+ result = Curl_sasl_create_xoauth2_message(data, conn->user,
+ conn->xoauth2_bearer,
+ initresp, len);
+ }
+ else if((smtpc->authmechs & SASL_MECH_LOGIN) &&
+ (smtpc->prefmech & SASL_MECH_LOGIN)) {
+ *mech = SASL_MECH_STRING_LOGIN;
+ *state1 = SMTP_AUTH_LOGIN;
+ *state2 = SMTP_AUTH_LOGIN_PASSWD;
+ smtpc->authused = SASL_MECH_LOGIN;
+
+ if(data->set.sasl_ir)
+ result = Curl_sasl_create_login_message(data, conn->user, initresp, len);
+ }
+ else if((smtpc->authmechs & SASL_MECH_PLAIN) &&
+ (smtpc->prefmech & SASL_MECH_PLAIN)) {
+ *mech = SASL_MECH_STRING_PLAIN;
+ *state1 = SMTP_AUTH_PLAIN;
+ *state2 = SMTP_AUTH_FINAL;
+ smtpc->authused = SASL_MECH_PLAIN;
+
+ if(data->set.sasl_ir)
+ result = Curl_sasl_create_plain_message(data, conn->user, conn->passwd,
+ initresp, len);
+ }
+
+ return result;
+}
+
CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread)
{
/* When sending a SMTP payload we must detect CRLF. sequences making sure