#include "smtp.h"
#include <h/mts.h>
#include <h/signals.h>
+#include <h/utils.h>
+#include <h/netsec.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>
-#endif /* CYRUS_SASL */
-
-#ifdef TLS_SUPPORT
-#include <openssl/ssl.h>
-#include <openssl/err.h>
-#endif /* TLS_SUPPORT */
/*
* This module implements an interface to SendMail very similar
*/
#endif
-#define TRUE 1
-#define FALSE 0
-
#define NBITS ((sizeof (int)) * 8)
/*
#define SM_DOT 600 /* see above */
#define SM_QUIT 30
#define SM_CLOS 10
-#ifdef CYRUS_SASL
#define SM_AUTH 45
-#endif /* CYRUS_SASL */
static int sm_addrs = 0;
-static int sm_alarmed = 0;
static int sm_child = NOTOK;
static int sm_debug = 0;
static int sm_nl = TRUE;
static int sm_verbose = 0;
-
-static FILE *sm_rfp = NULL;
-static FILE *sm_wfp = NULL;
-
-#ifdef CYRUS_SASL
-/*
- * Some globals needed by SASL
- */
-
-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[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_user(void *, int, const char **, unsigned *);
-static int sm_get_pass(sasl_conn_t *, void *, int, sasl_secret_t **);
-
-static sasl_callback_t callbacks[] = {
- { SASL_CB_USER, (sasl_callback_ft) sm_get_user, NULL },
-#define SM_SASL_N_CB_USER 0
- { 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 },
-};
-
-#else /* CYRUS_SASL */
-int sasl_ssf = 0;
-#endif /* CYRUS_SASL */
-
-#ifdef TLS_SUPPORT
-static SSL_CTX *sslctx = NULL;
-static SSL *ssl = 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)
-#define SASL_MAXRECVBUF 65536
-static int sm_fgetc(FILE *);
-static char *sasl_inbuffer; /* SASL input buffer for encryption */
-static char *sasl_inptr; /* Pointer to current inbuf position */
-static int sasl_inbuflen; /* Current length of data in inbuf */
-#else
-#define sm_fgetc fgetc
-#endif
-
-static int tls_active = 0;
+static netsec_context *nsc = NULL;
static char *sm_noreply = "No reply text given";
static char *sm_moreply = "; ";
-
-struct smtp sm_reply; /* global... */
+static struct smtp sm_reply;
#define MAXEHLO 20
static int doingEHLO;
-char *EHLOkeys[MAXEHLO + 1];
+static char *EHLOkeys[MAXEHLO + 1];
/*
* static prototypes
*/
-static int smtp_init (char *, char *, char *, int, int, int, int, int, int,
- char *, char *, int);
-static int sendmail_init (char *, char *, int, int, int, int, int, int,
- char *, char *);
+static int smtp_init (char *, char *, char *, int, int, int, int, const char *,
+ const char *, const char *, int);
+static int sendmail_init (char *, int, int, int, int, const char *,
+ const char *);
static int rclient (char *, char *);
-static int sm_ierror (char *fmt, ...);
+static int sm_ierror (const char *fmt, ...);
+static int sm_nerror (char *);
static int smtalk (int time, char *fmt, ...);
-static int sm_wrecord (char *, int);
static int sm_wstream (char *, int);
-static int sm_werror (void);
static int smhear (void);
-static int sm_rrecord (char *, int *);
-static int sm_rerror (int);
-static void alrmser (int);
static char *EHLOset (char *);
-static int sm_fwrite(char *, int);
-static int sm_fputs(char *);
-static int sm_fputc(int);
-static void sm_fflush(void);
-static int sm_fgets(char *, int, FILE *);
-
-#ifdef CYRUS_SASL
-/*
- * Function prototypes needed for SASL
- */
-
-static int sm_auth_sasl(char *, int, char *, char *);
-#endif /* CYRUS_SASL */
+static int sm_sasl_callback(enum sasl_message_type, unsigned const char *,
+ unsigned int, unsigned char **, unsigned int *,
+ char **);
int
sm_init (char *client, char *server, char *port, int watch, int verbose,
- int debug, int queued, int sasl, int saslssf,
- char *saslmech, char *user, int tls)
+ int debug, int sasl, const char *saslmech, const char *user,
+ const char *oauth_svc, int tls)
{
if (sm_mts == MTS_SMTP)
return smtp_init (client, server, port, watch, verbose,
- debug, queued, sasl, saslssf, saslmech,
- user, tls);
- else
- return sendmail_init (client, server, watch, verbose,
- debug, queued, sasl, saslssf, saslmech,
- user);
+ debug, sasl, saslmech, user, oauth_svc, tls);
+
+ return sendmail_init (client, watch, verbose, debug, sasl,
+ saslmech, user);
}
static int
smtp_init (char *client, char *server, char *port, int watch, int verbose,
- int debug, int queued,
- int sasl, int saslssf, char *saslmech, char *user, int tls)
+ int debug, int sasl, const char *saslmech, const char *user,
+ const char *oauth_svc, int tls)
{
- int result, sd1, sd2;
-#ifdef CYRUS_SASL
- char *server_mechs;
-#else /* CYRUS_SASL */
- NMH_UNUSED (sasl);
- NMH_UNUSED (saslssf);
- NMH_UNUSED (saslmech);
- NMH_UNUSED (user);
-#endif /* CYRUS_SASL */
+ int result, sd1;
+ char *errstr;
if (watch)
verbose = TRUE;
sm_verbose = verbose;
sm_debug = debug;
- if (sm_rfp != NULL && sm_wfp != NULL)
+ if (nsc != NULL)
goto send_options;
if (client == NULL || *client == '\0') {
} else {
client = LocalName(1); /* no clientname -> LocalName */
}
+
+ /*
+ * Last-ditch check just in case client still isn't set to anything
+ */
+ if (client == NULL || *client == '\0')
+ client = "localhost";
}
- /*
- * Last-ditch check just in case client still isn't set to anything
- */
+ nsc = netsec_init();
- if (client == NULL || *client == '\0')
- client = "localhost";
+ if (user)
+ netsec_set_userid(nsc, user);
-#if defined(CYRUS_SASL) || defined(TLS_SUPPORT)
- sasl_inbuffer = malloc(SASL_MAXRECVBUF);
- if (!sasl_inbuffer)
- return sm_ierror("Unable to allocate %d bytes for read buffer",
- SASL_MAXRECVBUF);
-#endif /* CYRUS_SASL || TLS_SUPPORT */
+ if (sm_debug)
+ netsec_set_snoop(nsc, 1);
- if ((sd1 = rclient (server, port)) == NOTOK)
- return RP_BHST;
+ if (sasl) {
+ if (netsec_set_sasl_params(nsc, server, "smtp", saslmech,
+ sm_sasl_callback, &errstr) != OK)
+ return sm_nerror(errstr);
+ }
- if ((sd2 = dup (sd1)) == NOTOK) {
- close (sd1);
- return sm_ierror ("unable to dup");
+ if (oauth_svc) {
+ if (netsec_set_oauth_service(nsc, oauth_svc) != OK)
+ return sm_ierror("OAuth2 not supported");
}
- SIGNAL (SIGALRM, alrmser);
+ if ((sd1 = rclient (server, port)) == NOTOK)
+ return RP_BHST;
+
SIGNAL (SIGPIPE, SIG_IGN);
- if ((sm_rfp = fdopen (sd1, "r")) == NULL
- || (sm_wfp = fdopen (sd2, "w")) == NULL) {
- close (sd1);
- close (sd2);
- sm_rfp = sm_wfp = NULL;
- return sm_ierror ("unable to fdopen");
- }
+ netsec_set_fd(nsc, sd1, sd1);
- tls_active = 0;
+ if (tls) {
+ if (netsec_set_tls(nsc, 1, &errstr) != OK)
+ return sm_nerror(errstr);
+ }
-#ifdef TLS_SUPPORT
/*
* If tls == 2, that means that the user requested "initial" TLS,
* which happens right after the connection has opened. Do that
*/
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;
+ if (netsec_negotiate_tls(nsc, &errstr) != OK) {
+ sm_end(NOTOK);
+ return sm_nerror(errstr);
+ }
}
-#endif /* TLS_SUPPORT */
- sm_alarmed = 0;
- alarm (SM_OPEN);
+ netsec_set_timeout(nsc, SM_OPEN);
result = smhear ();
- alarm (0);
switch (result) {
case 220:
return RP_RPLY;
}
-#ifdef TLS_SUPPORT
/*
* If the user requested TLS support, then try to do the STARTTLS command
* as part of the initial dialog. Assuming this works, we then need to
* negotiation. Oblige them.
*/
- result = tls_negotiate();
-
- if (result != RP_OK)
- return result;
+ if (netsec_negotiate_tls(nsc, &errstr) != OK) {
+ sm_end(NOTOK);
+ return sm_nerror(errstr);
+ }
doingEHLO = 1;
result = smtalk (SM_HELO, "EHLO %s", client);
return RP_RPLY;
}
}
-#else /* TLS_SUPPORT */
- NMH_UNUSED (tls);
-#endif /* TLS_SUPPORT */
-#ifdef CYRUS_SASL
/*
* If the user asked for SASL, then check to see if the SMTP server
* supports it. Otherwise, error out (because the SMTP server
*/
if (sasl) {
+ char *server_mechs;
if (! (server_mechs = EHLOset("AUTH"))) {
sm_end(NOTOK);
return sm_ierror("SMTP server does not support SASL");
}
- if (saslmech && stringdex(saslmech, server_mechs) == -1) {
+ if (netsec_negotiate_sasl(nsc, server_mechs, &errstr) != OK) {
sm_end(NOTOK);
- return sm_ierror("Requested SASL mech \"%s\" is not in the "
- "list of supported mechanisms:\n%s",
- saslmech, server_mechs);
- }
-
- if (sm_auth_sasl(user, saslssf, saslmech ? saslmech : server_mechs,
- server) != RP_OK) {
- sm_end(NOTOK);
- return NOTOK;
+ return sm_nerror(errstr);
}
}
-#endif /* CYRUS_SASL */
send_options: ;
if (watch && EHLOset ("XVRB"))
smtalk (SM_HELO, "VERB on");
- if (queued && EHLOset ("XQUE"))
- smtalk (SM_HELO, "QUED");
return RP_OK;
}
int
-sendmail_init (char *client, char *server, int watch, int verbose,
- int debug, int queued,
- int sasl, int saslssf, char *saslmech, char *user)
+sendmail_init (char *client, int watch, int verbose, int debug, int sasl,
+ const char *saslmech, const 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 (server);
- NMH_UNUSED (sasl);
- NMH_UNUSED (saslssf);
- NMH_UNUSED (saslmech);
- NMH_UNUSED (user);
-#endif /* CYRUS_SASL */
+ char *vec[15], *errstr;
if (watch)
verbose = TRUE;
sm_verbose = verbose;
sm_debug = debug;
- if (sm_rfp != NULL && sm_wfp != NULL)
+ if (nsc)
return RP_OK;
if (client == NULL || *client == '\0') {
client = clientname;
else
client = LocalName(1); /* no clientname -> LocalName */
+
+ /*
+ * Last-ditch check just in case client still isn't set to anything
+ */
+ if (client == NULL || *client == '\0')
+ client = "localhost";
}
- /*
- * Last-ditch check just in case client still isn't set to anything
- */
+ nsc = netsec_init();
- if (client == NULL || *client == '\0')
- client = "localhost";
+ if (user)
+ netsec_set_userid(nsc, user);
-#if defined(CYRUS_SASL) || defined(TLS_SUPPORT)
- sasl_inbuffer = malloc(SASL_MAXRECVBUF);
- if (!sasl_inbuffer)
- return sm_ierror("Unable to allocate %d bytes for read buffer",
- SASL_MAXRECVBUF);
-#endif /* CYRUS_SASL || TLS_SUPPORT */
+ if (sm_debug)
+ netsec_set_snoop(nsc, 1);
+
+ if (sasl) {
+ if (netsec_set_sasl_params(nsc, client, "smtp", saslmech,
+ sm_sasl_callback, &errstr) != OK)
+ return sm_nerror(errstr);
+ }
if (pipe (pdi) == NOTOK)
return sm_ierror ("no pipes");
vecp = 0;
vec[vecp++] = r1bindex (sendmail, '/');
vec[vecp++] = "-bs";
- vec[vecp++] = watch ? "-odi" : queued ? "-odq" : "-odb";
+ vec[vecp++] = watch ? "-odi" : "-odb";
vec[vecp++] = "-oem";
vec[vecp++] = "-om";
if (verbose)
vec[vecp++] = "-ov";
vec[vecp++] = NULL;
- setgid (getegid ());
- setuid (geteuid ());
execvp (sendmail, vec);
fprintf (stderr, "unable to exec ");
perror (sendmail);
_exit (-1); /* NOTREACHED */
default:
- SIGNAL (SIGALRM, alrmser);
SIGNAL (SIGPIPE, SIG_IGN);
close (pdi[1]);
close (pdo[0]);
- if ((sm_rfp = fdopen (pdi[0], "r")) == NULL
- || (sm_wfp = fdopen (pdo[1], "w")) == NULL) {
- close (pdi[0]);
- close (pdo[1]);
- sm_rfp = sm_wfp = NULL;
- return sm_ierror ("unable to fdopen");
- }
- sm_alarmed = 0;
- alarm (SM_OPEN);
+
+ netsec_set_fd(nsc, pdi[i], pdo[1]);
+ netsec_set_timeout(nsc, SM_OPEN);
result = smhear ();
- alarm (0);
switch (result) {
case 220:
break;
return RP_RPLY;
}
-#ifdef CYRUS_SASL
- /*
- * If the user asked for SASL, then check to see if the SMTP server
- * supports it. Otherwise, error out (because the SMTP server
- * might have been spoofed; we don't want to just silently not
- * do authentication
- */
-
- if (sasl) {
- if (! (server_mechs = EHLOset("AUTH"))) {
- sm_end(NOTOK);
- return sm_ierror("SMTP server does not support SASL");
- }
-
- if (saslmech && stringdex(saslmech, server_mechs) == -1) {
- sm_end(NOTOK);
- return sm_ierror("Requested SASL mech \"%s\" is not in the "
- "list of supported mechanisms:\n%s",
- saslmech, server_mechs);
- }
-
- if (sm_auth_sasl(user, saslssf, saslmech ? saslmech : server_mechs,
- server) != RP_OK) {
- sm_end(NOTOK);
- return NOTOK;
- }
- }
-#endif /* CYRUS_SASL */
+ /*
+ * If the user asked for SASL, then check to see if the SMTP server
+ * supports it. Otherwise, error out (because the SMTP server
+ * might have been spoofed; we don't want to just silently not
+ * do authentication
+ */
+
+ if (sasl) {
+ char *server_mechs;
+ if (! (server_mechs = EHLOset("AUTH"))) {
+ sm_end(NOTOK);
+ return sm_ierror("SMTP server does not support SASL");
+ }
+ if (netsec_negotiate_sasl(nsc, server_mechs, &errstr) != OK) {
+ sm_end(NOTOK);
+ return sm_nerror(errstr);
+ }
+ }
if (watch)
smtalk (SM_HELO, "VERB on");
}
int
-sm_winit (char *from)
+sm_winit (char *from, int smtputf8, int eightbit)
{
- switch (smtalk (SM_MAIL, "MAIL FROM:<%s>", from)) {
+ const char *mail_parameters = "";
+
+ if (smtputf8) {
+ /* Just for information, if an attempt is made to send to an 8-bit
+ address without specifying SMTPUTF8, Gmail responds with
+ 555 5.5.2 Syntax error.
+ Gmail doesn't require the 8BITMIME, but RFC 6531 Sec. 1.2 does. */
+ if (EHLOset ("8BITMIME") && EHLOset ("SMTPUTF8")) {
+ mail_parameters = " BODY=8BITMIME SMTPUTF8";
+ } else {
+ advise (NULL, "SMTP server does not support %s, not sending.\n"
+ "Rebuild message with 7-bit headers, WITHOUT -headerencoding utf-8.",
+ EHLOset ("SMTPUTF8") ? "8BITMIME" : "SMTPUTF8");
+ sm_end (NOTOK);
+ return RP_UCMD;
+ }
+ } else if (eightbit) {
+ /* Comply with RFC 6152, for messages that have any 8-bit characters
+ in their body. */
+ if (EHLOset ("8BITMIME")) {
+ mail_parameters = " BODY=8BITMIME";
+ } else {
+ advise (NULL, "SMTP server does not support 8BITMIME, not sending.\n"
+ "Suggest encoding message for 7-bit transport by setting your\n"
+ "locale to C, and/or specifying *b64 in mhbuild directives.");
+ sm_end (NOTOK);
+ return RP_UCMD;
+ }
+ }
+
+ switch (smtalk (SM_MAIL, "MAIL FROM:<%s>%s", from, mail_parameters)) {
case 250:
sm_addrs = 0;
return RP_OK;
{
int result;
- sm_alarmed = 0;
- alarm (SM_TEXT);
result = sm_wstream (buffer, len);
- alarm (0);
return (result == NOTOK ? RP_BHST : RP_OK);
}
}
}
- if (sm_rfp == NULL && sm_wfp == NULL)
+ if (nsc == NULL)
return RP_OK;
switch (type) {
break;
}
-#ifdef TLS_SUPPORT
- if (tls_active) {
- BIO_ssl_shutdown(io);
- BIO_free_all(io);
- }
-#endif /* TLS_SUPPORT */
-
- if (sm_rfp != NULL) {
- alarm (SM_CLOS);
- fclose (sm_rfp);
- alarm (0);
- }
- if (sm_wfp != NULL) {
- alarm (SM_CLOS);
- fclose (sm_wfp);
- alarm (0);
+ if (nsc != NULL) {
+ netsec_shutdown(nsc, 1);
+ nsc = NULL;
}
if (sm_mts == MTS_SMTP) {
status = 0;
-#ifdef CYRUS_SASL
- if (conn) {
- sasl_dispose(&conn);
- if (sasl_outbuffer) {
- free(sasl_outbuffer);
- }
- }
- if (sasl_inbuffer)
- free(sasl_inbuffer);
-#endif /* CYRUS_SASL */
} else if (sm_child != NOTOK) {
status = pidwait (sm_child, OK);
sm_child = NOTOK;
status = OK;
}
- sm_rfp = sm_wfp = NULL;
return (status ? RP_BHST : RP_OK);
}
-#ifdef CYRUS_SASL
-/*
- * This function implements SASL authentication for SMTP. If this function
- * completes successfully, then authentication is successful and we've
- * (optionally) negotiated a security layer.
- */
+
static int
-sm_auth_sasl(char *user, int saslssf, char *mechlist, char *inhost)
+sm_ierror (const char *fmt, ...)
{
- int result, status;
- unsigned int buflen, outlen;
- char *buf, outbuf[BUFSIZ], host[NI_MAXHOST];
- const char *chosen_mech;
- sasl_security_properties_t secprops;
- sasl_ssf_t *ssf;
- int *outbufmax;
- char *pass = NULL;
-
- /*
- * Initialize the callback contexts
- */
-
- /*
- * 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.
- */
-
- memset(host, 0, sizeof(host));
-
- if (!inhost) {
- struct sockaddr_storage sin;
- socklen_t len = sizeof(sin);
- int result;
-
- if (getpeername(fileno(sm_wfp), (struct sockaddr *) &sin, &len) < 0) {
- sm_ierror("getpeername on SMTP socket failed: %s",
- strerror(errno));
- return NOTOK;
- }
-
- result = getnameinfo((struct sockaddr *) &sin, len, host, sizeof(host),
- NULL, 0, NI_NAMEREQD);
- if (result != 0) {
- sm_ierror("Unable to look up name of connected host: %s",
- gai_strerror(result));
- return NOTOK;
- }
- } else {
- strncpy(host, inhost, sizeof(host) - 1);
- }
-
- callbacks[SM_SASL_N_CB_USER].context = user;
- callbacks[SM_SASL_N_CB_AUTHNAME].context = user;
-
- sasl_pw_context[0] = host;
- sasl_pw_context[1] = user;
- sasl_pw_context[2] = pass;
-
- 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. But if TLS is active, then
- * don't negotiate encryption here.
- */
-
- memset(&secprops, 0, sizeof(secprops));
- secprops.maxbufsize = SASL_MAXRECVBUF;
- secprops.max_ssf =
- tls_active ? 0 : (saslssf != -1 ? (unsigned int) saslssf : UINT_MAX);
-
- 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_errdetail(conn));
- 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 (sasl_ssf > 0) {
- sasl_outbuffer = malloc(maxoutbuf);
+ va_list ap;
- if (sasl_outbuffer == NULL) {
- sm_ierror("Unable to allocate %d bytes for SASL output "
- "buffer", maxoutbuf);
- return NOTOK;
- }
- sasl_outbuflen = 0;
- sasl_inbuflen = 0;
- sasl_inptr = sasl_inbuffer;
- } else {
- sasl_outbuffer = NULL;
- /* Don't NULL out sasl_inbuffer because it could be used in
- sm_fgetc (). */
- }
+ va_start(ap, fmt);
+ vsnprintf (sm_reply.text, sizeof(sm_reply.text), fmt, ap);
+ va_end(ap);
- sasl_complete = 1;
+ sm_reply.length = strlen (sm_reply.text);
+ sm_reply.code = NOTOK;
- return RP_OK;
+ return RP_BHST;
}
/*
- * Our callback functions to feed data to the SASL library
+ * Like sm_ierror, but assume it's an allocated error string we need to free.
*/
static int
-sm_get_user(void *context, int id, const char **result, unsigned *len)
+sm_nerror (char *str)
{
- 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;
- int len;
-
- NMH_UNUSED (conn);
-
- if (! psecret || id != SASL_CB_PASS)
- return SASL_BADPARAM;
-
- len = strlen (pw_context[2]);
-
- if (! (*psecret = (sasl_secret_t *) malloc(sizeof(sasl_secret_t) + len))) {
- return SASL_NOMEM;
- }
-
- (*psecret)->len = len;
- strcpy((char *) (*psecret)->data, pw_context[2]);
-
- return SASL_OK;
-}
-#endif /* CYRUS_SASL */
-
-static int
-sm_ierror (char *fmt, ...)
-{
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf (sm_reply.text, sizeof(sm_reply.text), fmt, ap);
- va_end(ap);
-
- sm_reply.length = strlen (sm_reply.text);
+ strncpy(sm_reply.text, str, sizeof(sm_reply.text));
+ sm_reply.text[sizeof(sm_reply.text) - 1] = '\0';
+ sm_reply.length = strlen(sm_reply.text);
sm_reply.code = NOTOK;
+ free(str);
return RP_BHST;
}
smtalk (int time, char *fmt, ...)
{
va_list ap;
+ char *errstr;
int result;
- char buffer[BUFSIZ];
va_start(ap, fmt);
- vsnprintf (buffer, sizeof(buffer), fmt, ap);
+ result = netsec_vprintf (nsc, &errstr, fmt, ap);
va_end(ap);
- if (sm_debug) {
- if (sasl_ssf)
- printf("(sasl-encrypted) ");
- if (tls_active)
- printf("(tls-encrypted) ");
- printf ("=> %s\n", buffer);
- fflush (stdout);
- }
-
- sm_alarmed = 0;
- alarm ((unsigned) time);
- if ((result = sm_wrecord (buffer, strlen (buffer))) != NOTOK)
- result = smhear ();
- alarm (0);
-
- return result;
-}
+ if (result != OK)
+ return sm_nerror(errstr);
+ if (netsec_printf (nsc, &errstr, "\r\n") != OK)
+ return sm_nerror(errstr);
-/*
- * write the buffer to the open SMTP channel
- */
-
-static int
-sm_wrecord (char *buffer, int len)
-{
- if (sm_wfp == NULL)
- return sm_werror ();
+ if (netsec_flush (nsc, &errstr) != OK)
+ return sm_nerror(errstr);
- sm_fwrite (buffer, len);
- sm_fputs ("\r\n");
- sm_fflush ();
+ netsec_set_timeout(nsc, time);
- return (ferror (sm_wfp) ? sm_werror () : OK);
+ return smhear ();
}
static int
sm_wstream (char *buffer, int len)
{
- char *bp;
+ char *bp, *errstr;
static char lc = '\0';
+ int rc;
- if (sm_wfp == NULL)
- return sm_werror ();
+ if (nsc == NULL) {
+ sm_ierror("No socket opened");
+ return NOTOK;
+ }
if (buffer == NULL && len == 0) {
+ rc = OK;
if (lc != '\n')
- sm_fputs ("\r\n");
+ rc = netsec_write(nsc, "\r\n", 2, &errstr);
lc = '\0';
- return (ferror (sm_wfp) ? sm_werror () : OK);
+ if (rc != OK)
+ sm_nerror(errstr);
+ return rc;
}
- for (bp = buffer; len > 0; bp++, len--) {
+ for (bp = buffer; bp && len > 0; bp++, len--) {
switch (*bp) {
case '\n':
sm_nl = TRUE;
- sm_fputc ('\r');
+ if (netsec_write(nsc, "\r", 1, &errstr) != OK) {
+ sm_nerror(errstr);
+ return NOTOK;
+ }
break;
case '.':
if (sm_nl)
- sm_fputc ('.');/* FALL THROUGH */
+ if (netsec_write(nsc, ".", 1, &errstr) != OK) {
+ sm_nerror(errstr);
+ return NOTOK;
+ } /* FALL THROUGH */
+
default:
sm_nl = FALSE;
}
- sm_fputc (*bp);
- if (ferror (sm_wfp))
- return sm_werror ();
+ if (netsec_write(nsc, bp, 1, &errstr) != OK) {
+ sm_nerror(errstr);
+ return NOTOK;
+ }
}
if (bp > buffer)
lc = *--bp;
- return (ferror (sm_wfp) ? sm_werror () : OK);
-}
-
-/*
- * Write out to the network, but do buffering for SASL (if enabled)
- */
-
-static int
-sm_fwrite(char *buffer, int len)
-{
-#ifdef CYRUS_SASL
- const char *output;
- unsigned int outputlen;
-
- if (sasl_complete == 0 || sasl_ssf == 0) {
-#endif /* CYRUS_SASL */
-#ifdef TLS_SUPPORT
- if (tls_active) {
- int ret;
-
- ret = BIO_write(io, buffer, len);
-
- if (ret <= 0) {
- sm_ierror("TLS error during write: %s",
- ERR_error_string(ERR_get_error(), NULL));
- return NOTOK;
- }
- } else
-#endif /* TLS_SUPPORT */
- fwrite(buffer, sizeof(*buffer), len, sm_wfp);
-#ifdef CYRUS_SASL
- } else {
- while (len >= maxoutbuf - sasl_outbuflen) {
- memcpy(sasl_outbuffer + sasl_outbuflen, buffer,
- maxoutbuf - sasl_outbuflen);
- len -= maxoutbuf - sasl_outbuflen;
- sasl_outbuflen = 0;
-
- if (sasl_encode(conn, sasl_outbuffer, maxoutbuf,
- &output, &outputlen) != SASL_OK) {
- sm_ierror("Unable to SASL encode connection data: %s",
- sasl_errdetail(conn));
- return NOTOK;
- }
-
- fwrite(output, sizeof(*output), outputlen, sm_wfp);
- }
-
- if (len > 0) {
- memcpy(sasl_outbuffer + sasl_outbuflen, buffer, len);
- sasl_outbuflen += len;
- }
- }
-#endif /* CYRUS_SASL */
- 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()
- */
-
-static int
-sm_fputs(char *buffer)
-{
- return sm_fwrite(buffer, strlen(buffer));
-}
-
-static int
-sm_fputc(int c)
-{
- char h = c;
-
- return sm_fwrite(&h, 1);
-}
-
-/*
- * Flush out any pending data on the connection
- */
-
-static void
-sm_fflush(void)
-{
-#ifdef CYRUS_SASL
- const char *output;
- unsigned int outputlen;
- int result;
-
- if (sasl_complete == 1 && sasl_ssf > 0 && sasl_outbuflen > 0) {
- result = sasl_encode(conn, sasl_outbuffer, sasl_outbuflen,
- &output, &outputlen);
- if (result != SASL_OK) {
- sm_ierror("Unable to SASL encode connection data: %s",
- sasl_errdetail(conn));
- return;
- }
-
- fwrite(output, sizeof(*output), outputlen, sm_wfp);
- sasl_outbuflen = 0;
- }
-#endif /* CYRUS_SASL */
-
-#ifdef TLS_SUPPORT
- if (tls_active) {
- (void) BIO_flush(io);
- }
-#endif /* TLS_SUPPORT */
-
- fflush(sm_wfp);
-}
-
-static int
-sm_werror (void)
-{
- sm_reply.length =
- strlen (strcpy (sm_reply.text, sm_wfp == NULL ? "no socket opened"
- : sm_alarmed ? "write to socket timed out"
- : "error writing to socket"));
-
- return (sm_reply.code = NOTOK);
+ return OK;
}
static int
smhear (void)
{
- int i, code, cont, bc = 0, rc, more;
+ int i, code, cont, more;
+ size_t buflen, rc;
unsigned char *bp;
char *rp;
- char **ehlo = NULL, buffer[BUFSIZ];
+ char *errstr;
+ char **ehlo = EHLOkeys, *buffer;
if (doingEHLO) {
static int at_least_once = 0;
rp = sm_reply.text;
rc = sizeof(sm_reply.text) - 1;
- for (more = FALSE; sm_rrecord ((char *) (bp = (unsigned char *) buffer),
- &bc) != NOTOK ; ) {
- if (sm_debug) {
- if (sasl_ssf > 0)
- printf("(sasl-decrypted) ");
- if (tls_active)
- printf("(tls-decrypted) ");
- printf ("<= %s\n", buffer);
- fflush (stdout);
- }
+ for (more = FALSE; (buffer = netsec_readline(nsc, &buflen,
+ &errstr)) != NULL ; ) {
if (doingEHLO
- && strncmp (buffer, "250", sizeof("250") - 1) == 0
+ && HasPrefix(buffer, "250")
&& (buffer[3] == '-' || doingEHLO == 2)
&& buffer[4]) {
if (doingEHLO == 2) {
doingEHLO = 2;
}
- for (; bc > 0 && (!isascii (*bp) || !isdigit (*bp)); bp++, bc--)
+ bp = (unsigned char *) buffer;
+
+ for (; buflen > 0 && (!isascii (*bp) || !isdigit (*bp)); bp++, buflen--)
continue;
cont = FALSE;
code = atoi ((char *) bp);
- bp += 3, bc -= 3;
- for (; bc > 0 && isspace (*bp); bp++, bc--)
+ bp += 3, buflen -= 3;
+ for (; buflen > 0 && isspace (*bp); bp++, buflen--)
continue;
- if (bc > 0 && *bp == '-') {
+ if (buflen > 0 && *bp == '-') {
cont = TRUE;
- bp++, bc--;
- for (; bc > 0 && isspace (*bp); bp++, bc--)
+ bp++, buflen--;
+ for (; buflen > 0 && isspace (*bp); bp++, buflen--)
continue;
}
} else {
sm_reply.code = code;
more = cont;
- if (bc <= 0) {
- /* can never fail to 0-terminate because of size of buffer vs fixed string */
- strncpy (buffer, sm_noreply, sizeof(buffer));
- bp = (unsigned char *) buffer;
- bc = strlen (sm_noreply);
+ if (buflen <= 0) {
+ bp = (unsigned char *) sm_noreply;
+ buflen = strlen (sm_noreply);
}
}
- if ((i = min (bc, rc)) > 0) {
+ if ((i = min (buflen, rc)) > 0) {
memcpy (rp, bp, i);
rp += i;
rc -= i;
i = strlen(sm_moreply);
- if (more && rc > i + 1) {
+ if (more && (int) rc > i + 1) {
memcpy (rp, sm_moreply, i); /* safe because of check in if() */
rp += i;
rc -= i;
sm_reply.text[sm_reply.length] = 0;
return sm_reply.code;
}
- return NOTOK;
-}
-
-static int
-sm_rrecord (char *buffer, int *len)
-{
- int retval;
-
- if (sm_rfp == NULL)
- return sm_rerror(0);
-
- buffer[*len = 0] = 0;
-
- if ((retval = sm_fgets (buffer, BUFSIZ, sm_rfp)) != RP_OK)
- return sm_rerror (retval);
- *len = strlen (buffer);
- /* *len should be >0 except on EOF, but check for safety's sake */
- if (*len == 0)
- return sm_rerror (RP_EOF);
- if (buffer[*len - 1] != '\n')
- while ((retval = sm_fgetc (sm_rfp)) != '\n' && retval != EOF &&
- retval != -2)
- continue;
- else
- if ((*len > 1) && (buffer[*len - 2] == '\r'))
- *len -= 1;
- *len -= 1;
- buffer[*len] = 0;
-
- return OK;
-}
-
-/*
- * Our version of fgets, which calls our private fgetc function
- */
-
-static int
-sm_fgets(char *buffer, int size, FILE *f)
-{
- int c;
-
- do {
- c = sm_fgetc(f);
-
- if (c == EOF)
- return RP_EOF;
-
- if (c == -2)
- return NOTOK;
-
- *buffer++ = c;
- } while (size > 1 && c != '\n');
-
- *buffer = '\0';
-
- return RP_OK;
-}
-
-
-#if defined(CYRUS_SASL) || defined(TLS_SUPPORT)
-/*
- * Read from the network, but do SASL or TLS encryption
- */
-
-static int
-sm_fgetc(FILE *f)
-{
- char tmpbuf[BUFSIZ], *retbuf;
- unsigned int retbufsize = 0;
- int cc, result;
-
- /*
- * If we have leftover data, return it
- */
-
- if (sasl_inbuflen) {
- sasl_inbuflen--;
- return (int) *sasl_inptr++;
- }
-
- /*
- * If not, read from the network until we have some data to return
- */
-
- while (retbufsize == 0) {
-
-#ifdef TLS_SUPPORT
- if (tls_active) {
- cc = SSL_read(ssl, tmpbuf, sizeof(tmpbuf));
-
- if (cc == 0) {
- result = SSL_get_error(ssl, cc);
-
- if (result != SSL_ERROR_ZERO_RETURN) {
- sm_ierror("TLS peer aborted connection");
- }
-
- return EOF;
- }
-
- if (cc < 0) {
- sm_ierror("SSL_read failed: %s",
- ERR_error_string(ERR_get_error(), NULL));
- return -2;
- }
- } else
-#endif /* TLS_SUPPORT */
-
- cc = read(fileno(f), tmpbuf, sizeof(tmpbuf));
-
- if (cc == 0)
- return EOF;
-
- if (cc < 0) {
- sm_ierror("Unable to read from network: %s", strerror(errno));
- return -2;
- }
-
- /*
- * Don't call sasl_decode unless sasl is complete and we have
- * encryption working
- */
-
-#ifdef CYRUS_SASL
- if (sasl_complete == 0 || sasl_ssf == 0) {
- retbuf = tmpbuf;
- retbufsize = cc;
- } else {
- result = sasl_decode(conn, tmpbuf, cc, (const char **) &retbuf,
- &retbufsize);
-
- if (result != SASL_OK) {
- sm_ierror("Unable to decode SASL network data: %s",
- sasl_errdetail(conn));
- return -2;
- }
- }
-#else /* ! CYRUS_SASL */
- retbuf = tmpbuf;
- retbufsize = cc;
-#endif /* CYRUS_SASL */
- }
-
- if (retbufsize > SASL_MAXRECVBUF) {
- sm_ierror("Received data (%d bytes) is larger than the buffer "
- "size (%d bytes)", retbufsize, SASL_MAXRECVBUF);
- return -2;
- }
-
- memcpy(sasl_inbuffer, retbuf, retbufsize);
- sasl_inptr = sasl_inbuffer + 1;
- sasl_inbuflen = retbufsize - 1;
-
- return (int) sasl_inbuffer[0];
-}
-#endif /* CYRUS_SASL || TLS_SUPPORT */
-
-static int
-sm_rerror (int rc)
-{
- if (sm_mts == MTS_SMTP)
- sm_reply.length =
- strlen (strcpy (sm_reply.text, sm_rfp == NULL ? "no socket opened"
- : sm_alarmed ? "read from socket timed out"
- : rc == RP_EOF ? "premature end-of-file on socket"
- : "error reading from socket"));
- else
- sm_reply.length =
- strlen (strcpy (sm_reply.text, sm_rfp == NULL ? "no pipe opened"
- : sm_alarmed ? "read from pipe timed out"
- : rc == RP_EOF ? "premature end-of-file on pipe"
- : "error reading from pipe"));
-
- return (sm_reply.code = NOTOK);
-}
-
-
-static void
-alrmser (int i)
-{
- NMH_UNUSED (i);
-
-#ifndef RELIABLE_SIGNALS
- SIGNAL (SIGALRM, alrmser);
-#endif
-
- sm_alarmed++;
- if (sm_debug) {
- printf ("timed out...\n");
- fflush (stdout);
- }
+ sm_nerror(errstr);
+ return NOTOK;
}
for (ehlo = EHLOkeys; *ehlo; ehlo++) {
ep = *ehlo;
- if (strncmp (ep, s, len) == 0) {
+ if (HasPrefix(ep, s)) {
for (ep += len; *ep == ' '; ep++)
continue;
return ep;
return 0;
}
+
+/*
+ * Our SASL callback; we are either given SASL tokens to generate network
+ * protocols messages for, or we decode incoming protocol messages and
+ * convert them to binary SASL tokens to pass up into the SASL library.
+ */
+
+static int
+sm_sasl_callback(enum sasl_message_type mtype, unsigned const char *indata,
+ unsigned int indatalen, unsigned char **outdata,
+ unsigned int *outdatalen, char **errstr)
+{
+ int rc, snoopoffset;
+ char *mech, *line;
+ size_t len;
+
+ switch (mtype) {
+ case NETSEC_SASL_START:
+ /*
+ * Generate an AUTH message; if we were given an input token
+ * then generate a an AUTH message that includes the initial
+ * response.
+ */
+
+ mech = netsec_get_sasl_mechanism(nsc);
+
+ if (indatalen) {
+ char *b64data;
+
+ b64data = mh_xmalloc(BASE64SIZE(indatalen));
+ writeBase64raw(indata, indatalen, (unsigned char *) b64data);
+
+ netsec_set_snoop_callback(nsc, netsec_b64_snoop_decoder,
+ &snoopoffset);
+ snoopoffset = 6 + strlen(mech);
+ rc = netsec_printf(nsc, errstr, "AUTH %s %s\r\n", mech, b64data);
+ free(b64data);
+ netsec_set_snoop_callback(nsc, NULL, NULL);
+ } else {
+ rc = netsec_printf(nsc, errstr, "AUTH %s\r\n", mech);
+ }
+
+ if (rc != OK)
+ return NOTOK;
+
+ if (netsec_flush(nsc, errstr) != OK)
+ return NOTOK;
+
+ break;
+
+ case NETSEC_SASL_READ:
+ /*
+ * Read in a line that should contain a 334 response code, followed
+ * by base64 response data.
+ */
+
+ netsec_set_snoop_callback(nsc, netsec_b64_snoop_decoder, &snoopoffset);
+ snoopoffset = 4;
+ line = netsec_readline(nsc, &len, errstr);
+ netsec_set_snoop_callback(nsc, NULL, NULL);
+
+ if (line == NULL)
+ return NOTOK;
+
+ if (len < 4) {
+ netsec_err(errstr, "Invalid format for SASL response");
+ return NOTOK;
+ }
+
+ if (!HasPrefix(line, "334 ")) {
+ netsec_err(errstr, "Improper SASL protocol response: %s", line);
+ return NOTOK;
+ }
+
+ if (len == 4) {
+ *outdata = NULL;
+ *outdatalen = 0;
+ } else {
+ rc = decodeBase64(line + 4, outdata, &len, 0, NULL);
+ if (rc != OK) {
+ netsec_err(errstr, "Unable to decode base64 response");
+ return NOTOK;
+ }
+ *outdatalen = len;
+ }
+ break;
+
+ case NETSEC_SASL_WRITE:
+ /*
+ * The output encoding is pretty simple, so this is easy.
+ */
+ if (indatalen == 0) {
+ rc = netsec_printf(nsc, errstr, "\r\n");
+ } else {
+ unsigned char *b64data;
+ b64data = mh_xmalloc(BASE64SIZE(indatalen));
+ writeBase64raw(indata, indatalen, b64data);
+ netsec_set_snoop_callback(nsc, netsec_b64_snoop_decoder, NULL);
+ rc = netsec_printf(nsc, errstr, "%s\r\n", b64data);
+ netsec_set_snoop_callback(nsc, NULL, NULL);
+ free(b64data);
+ }
+
+ if (rc != OK)
+ return NOTOK;
+
+ if (netsec_flush(nsc, errstr) != OK)
+ return NOTOK;
+ break;
+
+ case NETSEC_SASL_FINISH:
+ /*
+ * Finish the protocol; we're looking for a 235 message.
+ */
+ line = netsec_readline(nsc, &len, errstr);
+ if (line == NULL)
+ return NOTOK;
+
+ if (!HasPrefix(line, "235 ")) {
+ if (len > 4)
+ netsec_err(errstr, "Authentication failed: %s", line + 4);
+ else
+ netsec_err(errstr, "Authentication failed: %s", line);
+ return NOTOK;
+ }
+ break;
+
+ case NETSEC_SASL_CANCEL:
+ /*
+ * Cancel the SASL exchange; this is done by sending a single "*".
+ */
+ rc = netsec_printf(nsc, errstr, "*\r\n");
+ if (rc == OK)
+ rc = netsec_flush(nsc, errstr);
+ if (rc != OK)
+ return NOTOK;
+ break;
+ }
+
+ return OK;
+}
projects / nmh / blobdiff