-sm_auth_sasl(char *user, char *mechlist, char *host)
-{
- int result, status;
- unsigned int buflen, outlen;
- char *buf, outbuf[BUFSIZ];
- const char *chosen_mech;
- sasl_security_properties_t secprops;
- sasl_ssf_t *ssf;
- int *outbufmax;
-
- /*
- * 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
- * reverse-address lookup on the IP address to get the name.
- */
-
- if (!host) {
- struct sockaddr_in sin;
- int len = sizeof(sin);
- struct hostent *hp;
-
- if (getpeername(fileno(sm_wfp), (struct sockaddr *) &sin, &len) < 0) {
- sm_ierror("getpeername on SMTP socket failed: %s",
- strerror(errno));
- return NOTOK;
- }
-
- if ((hp = gethostbyaddr((void *) &sin.sin_addr, sizeof(sin.sin_addr),
- sin.sin_family)) == NULL) {
- sm_ierror("DNS lookup on IP address %s failed",
- inet_ntoa(sin.sin_addr));
- return NOTOK;
- }
-
- host = strdup(hp->h_name);
- }
-
- sasl_pw_context[0] = host;
- sasl_pw_context[1] = user;
-
- callbacks[SM_SASL_N_CB_PASS].context = sasl_pw_context;
-
- result = sasl_client_init(callbacks);
-
- if (result != SASL_OK) {
- sm_ierror("SASL library initialization failed: %s",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- result = sasl_client_new("smtp", host, NULL, NULL, NULL, 0, &conn);
-
- if (result != SASL_OK) {
- sm_ierror("SASL client initialization failed: %s",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- /*
- * Initialize the security properties
- */
-
- memset(&secprops, 0, sizeof(secprops));
- secprops.maxbufsize = BUFSIZ;
- secprops.max_ssf = 0; /* XXX change this when we do encryption */
-
- result = sasl_setprop(conn, SASL_SEC_PROPS, &secprops);
-
- if (result != SASL_OK) {
- sm_ierror("SASL security property initialization failed: %s",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- /*
- * Start the actual protocol. Feed the mech list into the library
- * and get out a possible initial challenge
- */
-
- result = sasl_client_start(conn, mechlist, NULL, (const char **) &buf,
- &buflen, (const char **) &chosen_mech);
-
- if (result != SASL_OK && result != SASL_CONTINUE) {
- sm_ierror("SASL client start failed: %s",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- /*
- * If we got an initial challenge, send it as part of the AUTH
- * command; otherwise, just send a plain AUTH command.
- */
-
- if (buflen) {
- status = sasl_encode64(buf, buflen, outbuf, sizeof(outbuf), NULL);
- if (status != SASL_OK) {
- sm_ierror("SASL base64 encode failed: %s",
- sasl_errstring(status, NULL, NULL));
- return NOTOK;
- }
-
- status = smtalk(SM_AUTH, "AUTH %s %s", chosen_mech, outbuf);
- } else
- status = smtalk(SM_AUTH, "AUTH %s", chosen_mech);
-
- /*
- * Now we loop until we either fail, get a SASL_OK, or a 235
- * response code. Receive the challenges and process them until
- * we're all done.
- */
-
- while (result == SASL_CONTINUE) {
-
- /*
- * If we get a 235 response, that means authentication has
- * succeeded and we need to break out of the loop (yes, even if
- * we still get SASL_CONTINUE from sasl_client_step()).
- *
- * Otherwise, if we get a message that doesn't seem to be a
- * valid response, then abort
- */
-
- if (status == 235)
- break;
- else if (status < 300 || status > 399)
- return RP_BHST;
-
- /*
- * Special case; a zero-length response from the SMTP server
- * is returned as a single =. If we get that, then set buflen
- * to be zero. Otherwise, just decode the response.
- */
-
- if (strcmp("=", sm_reply.text) == 0) {
- outlen = 0;
- } 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",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
- }
-
- result = sasl_client_step(conn, outbuf, outlen, NULL,
- (const char **) &buf, &buflen);
-
- if (result != SASL_OK && result != SASL_CONTINUE) {
- smtalk(SM_AUTH, "*");
- sm_ierror("SASL client negotiation failed: %s",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- status = sasl_encode64(buf, buflen, outbuf, sizeof(outbuf), NULL);
-
- if (status != SASL_OK) {
- smtalk(SM_AUTH, "*");
- sm_ierror("SASL base64 encode failed: %s",
- sasl_errstring(status, NULL, NULL));
- return NOTOK;
- }
-
- status = smtalk(SM_AUTH, outbuf);
- }
-
- /*
- * Make sure that we got the correct response
- */
-
- if (status < 200 || status > 299)
- return RP_BHST;
-
- /*
- * We _should_ have completed the authentication successfully.
- * Get a few properties from the authentication exchange.
- */
-
- result = sasl_getprop(conn, SASL_MAXOUTBUF, (const void **) &outbufmax);
-
- if (result != SASL_OK) {
- sm_ierror("Cannot retrieve SASL negotiated output buffer size: %s",
- sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- maxoutbuf = *outbufmax;
-
- result = sasl_getprop(conn, SASL_SSF, (const void **) &ssf);
-
- sasl_ssf = *ssf;
-
- if (result != SASL_OK) {
- sm_ierror("Cannot retrieve SASL negotiated security strength "
- "factor: %s", sasl_errstring(result, NULL, NULL));
- return NOTOK;
- }
-
- if (maxoutbuf == 0 || maxoutbuf > BUFSIZ)
- maxoutbuf = BUFSIZ;
-
- sasl_complete = 1;
-
- return RP_OK;
-}
-
-/*
- * Our callback functions to feed data to the SASL library
- */
-
-static int
-sm_get_user(void *context, int id, const char **result, unsigned *len)
-{
- char *user = (char *) context;
-
- if (! result || ((id != SASL_CB_USER) && (id != SASL_CB_AUTHNAME)))
- return SASL_BADPARAM;
-
- *result = user;
- if (len)
- *len = strlen(user);
-
- return SASL_OK;
-}
-
-static int
-sm_get_pass(sasl_conn_t *conn, void *context, int id,
- sasl_secret_t **psecret)
-{
- char **pw_context = (char **) context;
- char *pass = NULL;
- int len;
-
- if (! psecret || id != SASL_CB_PASS)
- return SASL_BADPARAM;
-
- ruserpass(pw_context[0], &(pw_context[1]), &pass);
-
- len = strlen(pass);
-
- *psecret = (sasl_secret_t *) malloc(sizeof(sasl_secret_t) + len);
-
- if (! *psecret) {
- free(pass);
- return SASL_NOMEM;
- }
-
- (*psecret)->len = len;
- strcpy((char *) (*psecret)->data, pass);
-/* free(pass); */
-
- return SASL_OK;
-}
-#endif /* CYRUS_SASL */
-
-static int
-sm_ierror (char *fmt, ...)
projects / nmh / blobdiff