#include <h/mh.h>
#include "smtp.h"
#include <h/mts.h>
-#include <signal.h>
#include <h/signals.h>
#ifdef CYRUS_SASL
#include <sasl/sasl.h>
#include <sasl/saslutil.h>
+# if SASL_VERSION_FULL < 0x020125
+ /* Cyrus SASL 2.1.25 introduced the sasl_callback_ft prototype,
+ which has an explicit void parameter list, according to best
+ practice. So we need to cast to avoid compile warnings.
+ Provide this prototype for earlier versions. */
+ typedef int (*sasl_callback_ft)();
+# endif /* SASL_VERSION_FULL < 0x020125 */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
-#include <errno.h>
#endif /* CYRUS_SASL */
#ifdef TLS_SUPPORT
static sasl_conn_t *conn = NULL; /* SASL connection state */
static int sasl_complete = 0; /* Has authentication succeded? */
static sasl_ssf_t sasl_ssf; /* Our security strength factor */
-static char *sasl_pw_context[2]; /* Context to pass into sm_get_pass */
+static char *sasl_pw_context[3]; /* Context to pass into sm_get_pass */
static int maxoutbuf; /* Maximum crypto output buffer */
static char *sasl_outbuffer; /* SASL output buffer for encryption */
static int sasl_outbuflen; /* Current length of data in outbuf */
static int sm_get_pass(sasl_conn_t *, void *, int, sasl_secret_t **);
static sasl_callback_t callbacks[] = {
- { SASL_CB_USER, sm_get_user, NULL },
+ { SASL_CB_USER, (sasl_callback_ft) sm_get_user, NULL },
#define SM_SASL_N_CB_USER 0
- { SASL_CB_PASS, sm_get_pass, NULL },
-#define SM_SASL_N_CB_PASS 1
- { SASL_CB_AUTHNAME, sm_get_user, NULL },
-#define SM_SASL_N_CB_AUTHNAME 2
+ { SASL_CB_AUTHNAME, (sasl_callback_ft) sm_get_user, NULL },
+#define SM_SASL_N_CB_AUTHNAME 1
+ { SASL_CB_PASS, (sasl_callback_ft) sm_get_pass, NULL },
+#define SM_SASL_N_CB_PASS 2
{ SASL_CB_LIST_END, NULL, NULL },
};
static BIO *sbior = NULL;
static BIO *sbiow = NULL;
static BIO *io = NULL;
+
+static int tls_negotiate(void);
#endif /* TLS_SUPPORT */
#if defined(CYRUS_SASL) || defined(TLS_SUPPORT)
* static prototypes
*/
static int smtp_init (char *, char *, char *, int, int, int, int, int, int,
- int, char *, char *, int);
+ char *, char *, int);
static int sendmail_init (char *, char *, int, int, int, int, int, int,
- int, char *, char *);
+ char *, char *);
static int rclient (char *, char *);
static int sm_ierror (char *fmt, ...);
int
sm_init (char *client, char *server, char *port, int watch, int verbose,
- int debug, int onex, int queued, int sasl, int saslssf,
+ int debug, int queued, int sasl, int saslssf,
char *saslmech, char *user, int tls)
{
if (sm_mts == MTS_SMTP)
return smtp_init (client, server, port, watch, verbose,
- debug, onex, queued, sasl, saslssf, saslmech,
+ debug, queued, sasl, saslssf, saslmech,
user, tls);
else
return sendmail_init (client, server, watch, verbose,
- debug, onex, queued, sasl, saslssf, saslmech,
+ debug, queued, sasl, saslssf, saslmech,
user);
}
static int
smtp_init (char *client, char *server, char *port, int watch, int verbose,
- int debug, int onex, int queued,
+ int debug, int queued,
int sasl, int saslssf, char *saslmech, char *user, int tls)
{
+ int result, sd1, sd2;
#ifdef CYRUS_SASL
char *server_mechs;
#else /* CYRUS_SASL */
NMH_UNUSED (saslmech);
NMH_UNUSED (user);
#endif /* CYRUS_SASL */
- int result, sd1, sd2;
if (watch)
verbose = TRUE;
tls_active = 0;
+#ifdef TLS_SUPPORT
+ /*
+ * If tls == 2, that means that the user requested "initial" TLS,
+ * which happens right after the connection has opened. Do that
+ * negotiation now
+ */
+
+ if (tls == 2) {
+ result = tls_negotiate();
+
+ /*
+ * Note: if tls_negotiate() fails it will call sm_end() for us,
+ * which closes the connection.
+ */
+ if (result != RP_OK)
+ return result;
+ }
+#endif /* TLS_SUPPORT */
+
sm_alarmed = 0;
alarm (SM_OPEN);
result = smhear ();
* restart the EHLO dialog after TLS negotiation is complete.
*/
- if (tls) {
- BIO *ssl_bio;
-
+ if (tls == 1) {
if (! EHLOset("STARTTLS")) {
sm_end(NOTOK);
return sm_ierror("SMTP server does not support TLS");
* negotiation. Oblige them.
*/
- if (! sslctx) {
- SSL_METHOD *method;
-
- SSL_library_init();
- SSL_load_error_strings();
-
- method = TLSv1_client_method(); /* Not sure about this */
-
- sslctx = SSL_CTX_new(method);
-
- if (! sslctx) {
- sm_end(NOTOK);
- return sm_ierror("Unable to initialize OpenSSL context: %s",
- ERR_error_string(ERR_get_error(), NULL));
- }
- }
-
- ssl = SSL_new(sslctx);
-
- if (! ssl) {
- sm_end(NOTOK);
- return sm_ierror("Unable to create SSL connection: %s",
- ERR_error_string(ERR_get_error(), NULL));
- }
-
- sbior = BIO_new_socket(fileno(sm_rfp), BIO_NOCLOSE);
- sbiow = BIO_new_socket(fileno(sm_wfp), BIO_NOCLOSE);
-
- if (sbior == NULL || sbiow == NULL) {
- sm_end(NOTOK);
- return sm_ierror("Unable to create BIO endpoints: %s",
- ERR_error_string(ERR_get_error(), NULL));
- }
-
- SSL_set_bio(ssl, sbior, sbiow);
- SSL_set_connect_state(ssl);
-
- /*
- * Set up a BIO to handle buffering for us
- */
-
- io = BIO_new(BIO_f_buffer());
-
- if (! io) {
- sm_end(NOTOK);
- return sm_ierror("Unable to create a buffer BIO: %s",
- ERR_error_string(ERR_get_error(), NULL));
- }
-
- ssl_bio = BIO_new(BIO_f_ssl());
-
- if (! ssl_bio) {
- sm_end(NOTOK);
- return sm_ierror("Unable to create a SSL BIO: %s",
- ERR_error_string(ERR_get_error(), NULL));
- }
+ result = tls_negotiate();
- BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
- BIO_push(io, ssl_bio);
-
- /*
- * Try doing the handshake now
- */
-
- if (BIO_do_handshake(io) < 1) {
- sm_end(NOTOK);
- return sm_ierror("Unable to negotiate SSL connection: %s",
- ERR_error_string(ERR_get_error(), NULL));
- }
-
- if (sm_debug) {
- SSL_CIPHER *cipher = SSL_get_current_cipher(ssl);
- printf("SSL negotiation successful: %s(%d) %s\n",
- SSL_CIPHER_get_name(cipher),
- SSL_CIPHER_get_bits(cipher, NULL),
- SSL_CIPHER_get_version(cipher));
-
- }
-
- tls_active = 1;
+ if (result != RP_OK)
+ return result;
doingEHLO = 1;
result = smtalk (SM_HELO, "EHLO %s", client);
send_options: ;
if (watch && EHLOset ("XVRB"))
smtalk (SM_HELO, "VERB on");
- if (onex && EHLOset ("XONE"))
- smtalk (SM_HELO, "ONEX");
if (queued && EHLOset ("XQUE"))
smtalk (SM_HELO, "QUED");
int
sendmail_init (char *client, char *server, int watch, int verbose,
- int debug, int onex, int queued,
+ int debug, int queued,
int sasl, int saslssf, char *saslmech, char *user)
{
+ unsigned int i, result, vecp;
+ int pdi[2], pdo[2];
+ char *vec[15];
#ifdef CYRUS_SASL
char *server_mechs;
#else /* CYRUS_SASL */
NMH_UNUSED (saslmech);
NMH_UNUSED (user);
#endif /* CYRUS_SASL */
- unsigned int i, result, vecp;
- int pdi[2], pdo[2];
- char *vec[15];
if (watch)
verbose = TRUE;
vec[vecp++] = watch ? "-odi" : queued ? "-odq" : "-odb";
vec[vecp++] = "-oem";
vec[vecp++] = "-om";
-# ifndef RAND
if (verbose)
vec[vecp++] = "-ov";
-# endif /* not RAND */
vec[vecp++] = NULL;
setgid (getegid ());
}
#endif /* CYRUS_SASL */
- if (onex)
- smtalk (SM_HELO, "ONEX");
if (watch)
smtalk (SM_HELO, "VERB on");
int status;
struct smtp sm_note;
- if (sm_mts == MTS_SENDMAIL) {
+ if (sm_mts == MTS_SENDMAIL_SMTP) {
switch (sm_child) {
case NOTOK:
case OK:
if (sm_mts == MTS_SMTP)
smtalk (SM_QUIT, "QUIT");
else {
+ /* The SIGPIPE block replaces old calls to discard ().
+ We're not sure what the discard () calls were for,
+ maybe to prevent deadlock on old systems. In any
+ case, blocking SIGPIPE should be harmless.
+ Because the file handles are closed below, leave it
+ blocked. */
+ sigset_t set, oset;
+ sigemptyset (&set);
+ sigaddset (&set, SIGPIPE);
+ sigprocmask (SIG_BLOCK, &set, &oset);
+
kill (sm_child, SIGKILL);
- discard (sm_rfp);
- discard (sm_wfp);
+ sm_child = NOTOK;
}
if (type == NOTOK) {
sm_reply.code = sm_note.code;
if (sasl_inbuffer)
free(sasl_inbuffer);
#endif /* CYRUS_SASL */
- } else {
+ } else if (sm_child != NOTOK) {
status = pidwait (sm_child, OK);
sm_child = NOTOK;
+ } else {
+ status = OK;
}
sm_rfp = sm_wfp = NULL;
sasl_security_properties_t secprops;
sasl_ssf_t *ssf;
int *outbufmax;
+ struct nmh_creds creds = { 0, 0, 0 };
/*
* Initialize the callback contexts
*/
- if (user == NULL)
- user = getusername();
-
- callbacks[SM_SASL_N_CB_USER].context = user;
- callbacks[SM_SASL_N_CB_AUTHNAME].context = user;
-
/*
* This is a _bit_ of a hack ... but if the hostname wasn't supplied
* to us on the command line, then call getpeername and do a
strncpy(host, inhost, sizeof(host) - 1);
}
+ nmh_get_credentials (host, user, 0, &creds);
+
+ /* It's OK to copy the creds pointers here. The callbacks that
+ use them will only be called before this function returns. */
+ callbacks[SM_SASL_N_CB_USER].context = creds.user;
+ callbacks[SM_SASL_N_CB_AUTHNAME].context = creds.user;
sasl_pw_context[0] = host;
- sasl_pw_context[1] = user;
+ sasl_pw_context[1] = creds.user;
+ sasl_pw_context[2] = creds.password;
callbacks[SM_SASL_N_CB_PASS].context = sasl_pw_context;
} else {
result = sasl_decode64(sm_reply.text, sm_reply.length,
outbuf, sizeof(outbuf), &outlen);
-
if (result != SASL_OK) {
smtalk(SM_AUTH, "*");
sm_ierror("SASL base64 decode failed: %s",
sm_get_pass(sasl_conn_t *conn, void *context, int id,
sasl_secret_t **psecret)
{
- NMH_UNUSED (conn);
-
char **pw_context = (char **) context;
- char *pass = NULL;
int len;
+ NMH_UNUSED (conn);
+
if (! psecret || id != SASL_CB_PASS)
return SASL_BADPARAM;
- ruserpass(pw_context[0], &(pw_context[1]), &pass);
+ len = strlen (pw_context[2]);
- len = strlen(pass);
-
- *psecret = (sasl_secret_t *) malloc(sizeof(sasl_secret_t) + len);
-
- if (! *psecret) {
- free(pass);
+ if (! (*psecret = (sasl_secret_t *) malloc(sizeof(sasl_secret_t) + len))) {
return SASL_NOMEM;
}
(*psecret)->len = len;
- strcpy((char *) (*psecret)->data, pass);
-/* free(pass); */
+ strcpy((char *) (*psecret)->data, pw_context[2]);
return SASL_OK;
}
return ferror(sm_wfp) ? NOTOK : RP_OK;
}
+#ifdef TLS_SUPPORT
+/*
+ * Negotiate Transport Layer Security
+ */
+
+static int
+tls_negotiate(void)
+{
+ BIO *ssl_bio;
+
+ if (! sslctx) {
+ const SSL_METHOD *method;
+
+ SSL_library_init();
+ SSL_load_error_strings();
+
+ method = TLSv1_client_method(); /* Not sure about this */
+
+ /* Older ssl takes a non-const arg. */
+ sslctx = SSL_CTX_new((SSL_METHOD *) method);
+
+ if (! sslctx) {
+ sm_end(NOTOK);
+ return sm_ierror("Unable to initialize OpenSSL context: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ }
+ }
+
+ ssl = SSL_new(sslctx);
+
+ if (! ssl) {
+ sm_end(NOTOK);
+ return sm_ierror("Unable to create SSL connection: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ }
+
+ sbior = BIO_new_socket(fileno(sm_rfp), BIO_NOCLOSE);
+ sbiow = BIO_new_socket(fileno(sm_wfp), BIO_NOCLOSE);
+
+ if (sbior == NULL || sbiow == NULL) {
+ sm_end(NOTOK);
+ return sm_ierror("Unable to create BIO endpoints: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ }
+
+ SSL_set_bio(ssl, sbior, sbiow);
+ SSL_set_connect_state(ssl);
+
+ /*
+ * Set up a BIO to handle buffering for us
+ */
+
+ io = BIO_new(BIO_f_buffer());
+
+ if (! io) {
+ sm_end(NOTOK);
+ return sm_ierror("Unable to create a buffer BIO: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ }
+
+ ssl_bio = BIO_new(BIO_f_ssl());
+
+ if (! ssl_bio) {
+ sm_end(NOTOK);
+ return sm_ierror("Unable to create a SSL BIO: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ }
+
+ BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
+ BIO_push(io, ssl_bio);
+
+ /*
+ * Try doing the handshake now
+ */
+
+ if (BIO_do_handshake(io) < 1) {
+ sm_end(NOTOK);
+ return sm_ierror("Unable to negotiate SSL connection: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ }
+
+ if (sm_debug) {
+ const SSL_CIPHER *cipher = SSL_get_current_cipher(ssl);
+ printf("SSL negotiation successful: %s(%d) %s\n",
+ SSL_CIPHER_get_name(cipher),
+ SSL_CIPHER_get_bits(cipher, NULL),
+ SSL_CIPHER_get_version(cipher));
+
+ }
+
+ tls_active = 1;
+
+ return RP_OK;
+}
+#endif /* TLS_SUPPORT */
+
/*
* Convenience functions to replace occurences of fputs() and fputc()
*/
projects / nmh / blobdiff