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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /src/xsasl/xsasl_cyrus_server.c
parentInitial commit. (diff)
downloadpostfix-upstream.tar.xz
postfix-upstream.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/xsasl/xsasl_cyrus_server.c')
-rw-r--r--src/xsasl/xsasl_cyrus_server.c641
1 files changed, 641 insertions, 0 deletions
diff --git a/src/xsasl/xsasl_cyrus_server.c b/src/xsasl/xsasl_cyrus_server.c
new file mode 100644
index 0000000..89e1fc9
--- /dev/null
+++ b/src/xsasl/xsasl_cyrus_server.c
@@ -0,0 +1,641 @@
+/*++
+/* NAME
+/* xsasl_cyrus_server 3
+/* SUMMARY
+/* Cyrus SASL server-side plug-in
+/* SYNOPSIS
+/* #include <xsasl_cyrus_server.h>
+/*
+/* XSASL_SERVER_IMPL *xsasl_cyrus_server_init(server_type, path_info)
+/* const char *server_type;
+/* const char *path_info;
+/* DESCRIPTION
+/* This module implements the Cyrus SASL server-side authentication
+/* plug-in.
+/*
+/* xsasl_cyrus_server_init() initializes the Cyrus SASL library and
+/* returns an implementation handle that can be used to generate
+/* SASL server instances.
+/*
+/* Arguments:
+/* .IP server_type
+/* The server type (cyrus). This argument is ignored, but it
+/* could be used when one implementation provides multiple
+/* variants.
+/* .IP path_info
+/* The base name of the SASL server configuration file (example:
+/* smtpd becomes /usr/lib/sasl2/smtpd.conf).
+/* DIAGNOSTICS
+/* Fatal: out of memory.
+/*
+/* Panic: interface violation.
+/*
+/* Other: the routines log a warning and return an error result
+/* as specified in xsasl_server(3).
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Initial implementation by:
+/* Till Franke
+/* SuSE Rhein/Main AG
+/* 65760 Eschborn, Germany
+/*
+/* Adopted by:
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <name_mask.h>
+#include <stringops.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+
+/* Application-specific. */
+
+#include <xsasl.h>
+#include <xsasl_cyrus.h>
+#include <xsasl_cyrus_common.h>
+
+#if defined(USE_SASL_AUTH) && defined(USE_CYRUS_SASL)
+
+#include <sasl.h>
+#include <saslutil.h>
+
+/*
+ * Silly little macros.
+ */
+#define STR(s) vstring_str(s)
+
+ /*
+ * Macros to handle API differences between SASLv1 and SASLv2. Specifics:
+ *
+ * The SASL_LOG_* constants were renamed in SASLv2.
+ *
+ * SASLv2's sasl_server_new takes two new parameters to specify local and
+ * remote IP addresses for auth mechs that use them.
+ *
+ * SASLv2's sasl_server_start and sasl_server_step no longer have the errstr
+ * parameter.
+ *
+ * SASLv2's sasl_decode64 function takes an extra parameter for the length of
+ * the output buffer.
+ *
+ * The other major change is that SASLv2 now takes more responsibility for
+ * deallocating memory that it allocates internally. Thus, some of the
+ * function parameters are now 'const', to make sure we don't try to free
+ * them too. This is dealt with in the code later on.
+ */
+
+#if SASL_VERSION_MAJOR < 2
+/* SASL version 1.x */
+#define SASL_SERVER_NEW(srv, fqdn, rlm, lport, rport, cb, secflags, pconn) \
+ sasl_server_new(srv, fqdn, rlm, cb, secflags, pconn)
+#define SASL_SERVER_START(conn, mech, clin, clinlen, srvout, srvoutlen, err) \
+ sasl_server_start(conn, mech, clin, clinlen, srvout, srvoutlen, err)
+#define SASL_SERVER_STEP(conn, clin, clinlen, srvout, srvoutlen, err) \
+ sasl_server_step(conn, clin, clinlen, srvout, srvoutlen, err)
+#define SASL_DECODE64(in, inlen, out, outmaxlen, outlen) \
+ sasl_decode64(in, inlen, out, outlen)
+typedef char *MECHANISM_TYPE;
+typedef unsigned MECHANISM_COUNT_TYPE;
+typedef char *SERVEROUT_TYPE;
+typedef void *VOID_SERVEROUT_TYPE;
+
+#endif
+
+#if SASL_VERSION_MAJOR >= 2
+/* SASL version > 2.x */
+#define SASL_SERVER_NEW(srv, fqdn, rlm, lport, rport, cb, secflags, pconn) \
+ sasl_server_new(srv, fqdn, rlm, lport, rport, cb, secflags, pconn)
+#define SASL_SERVER_START(conn, mech, clin, clinlen, srvout, srvoutlen, err) \
+ sasl_server_start(conn, mech, clin, clinlen, srvout, srvoutlen)
+#define SASL_SERVER_STEP(conn, clin, clinlen, srvout, srvoutlen, err) \
+ sasl_server_step(conn, clin, clinlen, srvout, srvoutlen)
+#define SASL_DECODE64(in, inlen, out, outmaxlen, outlen) \
+ sasl_decode64(in, inlen, out, outmaxlen, outlen)
+typedef const char *MECHANISM_TYPE;
+typedef int MECHANISM_COUNT_TYPE;
+typedef const char *SERVEROUT_TYPE;
+typedef const void *VOID_SERVEROUT_TYPE;
+
+#endif
+
+#ifndef NO_IP_CYRUS_SASL_AUTH
+#define USE_IP_CYRUS_SASL_AUTH
+#endif
+
+ /*
+ * The XSASL_CYRUS_SERVER object is derived from the generic XSASL_SERVER
+ * object.
+ */
+typedef struct {
+ XSASL_SERVER xsasl; /* generic members, must be first */
+ VSTREAM *stream; /* client-server connection */
+ sasl_conn_t *sasl_conn; /* SASL context */
+ VSTRING *decoded; /* decoded challenge or response */
+ char *username; /* authenticated user */
+ char *mechanism_list; /* applicable mechanisms */
+} XSASL_CYRUS_SERVER;
+
+ /*
+ * Forward declarations.
+ */
+static void xsasl_cyrus_server_done(XSASL_SERVER_IMPL *);
+static XSASL_SERVER *xsasl_cyrus_server_create(XSASL_SERVER_IMPL *,
+ XSASL_SERVER_CREATE_ARGS *);
+static void xsasl_cyrus_server_free(XSASL_SERVER *);
+static int xsasl_cyrus_server_first(XSASL_SERVER *, const char *,
+ const char *, VSTRING *);
+static int xsasl_cyrus_server_next(XSASL_SERVER *, const char *, VSTRING *);
+static int xsasl_cyrus_server_set_security(XSASL_SERVER *, const char *);
+static const char *xsasl_cyrus_server_get_mechanism_list(XSASL_SERVER *);
+static const char *xsasl_cyrus_server_get_username(XSASL_SERVER *);
+
+ /*
+ * SASL callback interface structure. These call-backs have no per-session
+ * context.
+ */
+#define NO_CALLBACK_CONTEXT 0
+
+static sasl_callback_t callbacks[] = {
+ {SASL_CB_LOG, (XSASL_CYRUS_CB) &xsasl_cyrus_log, NO_CALLBACK_CONTEXT},
+ {SASL_CB_LIST_END, 0, 0}
+};
+
+/* xsasl_cyrus_server_init - create implementation handle */
+
+XSASL_SERVER_IMPL *xsasl_cyrus_server_init(const char *unused_server_type,
+ const char *path_info)
+{
+ const char *myname = "xsasl_cyrus_server_init";
+ XSASL_SERVER_IMPL *xp;
+ int sasl_status;
+
+#if SASL_VERSION_MAJOR >= 2 && (SASL_VERSION_MINOR >= 2 \
+ || (SASL_VERSION_MINOR == 1 && SASL_VERSION_STEP >= 19))
+ int sasl_major;
+ int sasl_minor;
+ int sasl_step;
+
+ /*
+ * DLL hell guard.
+ */
+ sasl_version_info((const char **) 0, (const char **) 0,
+ &sasl_major, &sasl_minor,
+ &sasl_step, (int *) 0);
+ if (sasl_major != SASL_VERSION_MAJOR
+#if 0
+ || sasl_minor != SASL_VERSION_MINOR
+ || sasl_step != SASL_VERSION_STEP
+#endif
+ ) {
+ msg_warn("incorrect SASL library version. "
+ "Postfix was built with include files from version %d.%d.%d, "
+ "but the run-time library version is %d.%d.%d",
+ SASL_VERSION_MAJOR, SASL_VERSION_MINOR, SASL_VERSION_STEP,
+ sasl_major, sasl_minor, sasl_step);
+ return (0);
+ }
+#endif
+
+ if (*var_cyrus_conf_path) {
+#ifdef SASL_PATH_TYPE_CONFIG /* Cyrus SASL 2.1.22 */
+ if (sasl_set_path(SASL_PATH_TYPE_CONFIG,
+ var_cyrus_conf_path) != SASL_OK)
+ msg_warn("failed to set Cyrus SASL configuration path: \"%s\"",
+ var_cyrus_conf_path);
+#else
+ msg_warn("%s is not empty, but setting the Cyrus SASL configuration "
+ "path is not supported with SASL library version %d.%d.%d",
+ VAR_CYRUS_CONF_PATH, SASL_VERSION_MAJOR,
+ SASL_VERSION_MINOR, SASL_VERSION_STEP);
+#endif
+ }
+
+ /*
+ * Initialize the library: load SASL plug-in routines, etc.
+ */
+ if (msg_verbose)
+ msg_info("%s: SASL config file is %s.conf", myname, path_info);
+ if ((sasl_status = sasl_server_init(callbacks, path_info)) != SASL_OK) {
+ msg_warn("SASL per-process initialization failed: %s",
+ xsasl_cyrus_strerror(sasl_status));
+ return (0);
+ }
+
+ /*
+ * Return a generic XSASL_SERVER_IMPL object. We don't need to extend it
+ * with our own methods or data.
+ */
+ xp = (XSASL_SERVER_IMPL *) mymalloc(sizeof(*xp));
+ xp->create = xsasl_cyrus_server_create;
+ xp->done = xsasl_cyrus_server_done;
+ return (xp);
+}
+
+/* xsasl_cyrus_server_done - dispose of implementation */
+
+static void xsasl_cyrus_server_done(XSASL_SERVER_IMPL *impl)
+{
+ myfree((void *) impl);
+ sasl_done();
+}
+
+/* xsasl_cyrus_server_create - create server instance */
+
+static XSASL_SERVER *xsasl_cyrus_server_create(XSASL_SERVER_IMPL *unused_impl,
+ XSASL_SERVER_CREATE_ARGS *args)
+{
+ const char *myname = "xsasl_cyrus_server_create";
+ char *server_addr_port = 0;
+ char *client_addr_port = 0;
+ sasl_conn_t *sasl_conn = 0;
+ XSASL_CYRUS_SERVER *server = 0;
+ int sasl_status;
+
+ if (msg_verbose)
+ msg_info("%s: SASL service=%s, realm=%s",
+ myname, args->service, args->user_realm ?
+ args->user_realm : "(null)");
+
+ /*
+ * The optimizer will eliminate code duplication and/or dead code.
+ */
+#define XSASL_CYRUS_SERVER_CREATE_ERROR_RETURN(x) \
+ do { \
+ if (server) { \
+ xsasl_cyrus_server_free(&server->xsasl); \
+ } else { \
+ if (sasl_conn) \
+ sasl_dispose(&sasl_conn); \
+ } \
+ XSASL_CYRUS_SERVER_CREATE_RETURN(x); \
+ } while (0)
+
+#define XSASL_CYRUS_SERVER_CREATE_RETURN(x) \
+ do { \
+ if (server_addr_port) \
+ myfree(server_addr_port); \
+ if (client_addr_port) \
+ myfree(client_addr_port); \
+ return (x); \
+ } while (0)
+
+ /*
+ * Set up a new server context.
+ */
+#define NO_SECURITY_LAYERS (0)
+#define NO_SESSION_CALLBACKS ((sasl_callback_t *) 0)
+#define NO_AUTH_REALM ((char *) 0)
+
+#if SASL_VERSION_MAJOR >= 2 && defined(USE_IP_CYRUS_SASL_AUTH)
+
+ /*
+ * Get IP address and port of local and remote endpoints for SASL. Some
+ * implementation supports "[ipv6addr]:port" and "ipv4addr:port" (e.g.,
+ * https://illumos.org/man/3sasl/sasl_server_new), They still support the
+ * historical "address;port" syntax, so we stick with that for now.
+ */
+ server_addr_port = (*args->server_addr && *args->server_port ?
+ concatenate(args->server_addr, ";",
+ args->server_port, (char *) 0) : 0);
+ client_addr_port = (*args->client_addr && *args->client_port ?
+ concatenate(args->client_addr, ";",
+ args->client_port, (char *) 0) : 0);
+#else
+
+ /*
+ * Don't give any IP address information to SASL.
+ */
+#endif
+
+ if ((sasl_status =
+ SASL_SERVER_NEW(args->service, var_myhostname,
+ args->user_realm ? args->user_realm : NO_AUTH_REALM,
+ server_addr_port, client_addr_port,
+ NO_SESSION_CALLBACKS, NO_SECURITY_LAYERS,
+ &sasl_conn)) != SASL_OK) {
+ msg_warn("SASL per-connection server initialization: %s",
+ xsasl_cyrus_strerror(sasl_status));
+ XSASL_CYRUS_SERVER_CREATE_ERROR_RETURN(0);
+ }
+
+ /*
+ * Extend the XSASL_SERVER object with our own data. We use long-lived
+ * conversion buffers rather than local variables to avoid memory leaks
+ * in case of read/write timeout or I/O error.
+ */
+ server = (XSASL_CYRUS_SERVER *) mymalloc(sizeof(*server));
+ server->xsasl.free = xsasl_cyrus_server_free;
+ server->xsasl.first = xsasl_cyrus_server_first;
+ server->xsasl.next = xsasl_cyrus_server_next;
+ server->xsasl.get_mechanism_list = xsasl_cyrus_server_get_mechanism_list;
+ server->xsasl.get_username = xsasl_cyrus_server_get_username;
+ server->stream = args->stream;
+ server->sasl_conn = sasl_conn;
+ server->decoded = vstring_alloc(20);
+ server->username = 0;
+ server->mechanism_list = 0;
+
+ if (xsasl_cyrus_server_set_security(&server->xsasl, args->security_options)
+ != XSASL_AUTH_OK)
+ XSASL_CYRUS_SERVER_CREATE_ERROR_RETURN(0);
+
+ XSASL_CYRUS_SERVER_CREATE_RETURN(&server->xsasl);
+}
+
+/* xsasl_cyrus_server_set_security - set security properties */
+
+static int xsasl_cyrus_server_set_security(XSASL_SERVER *xp,
+ const char *sasl_opts_val)
+{
+ XSASL_CYRUS_SERVER *server = (XSASL_CYRUS_SERVER *) xp;
+ sasl_security_properties_t sec_props;
+ int sasl_status;
+
+ /*
+ * Security options. Some information can be found in the sasl.h include
+ * file.
+ */
+ memset(&sec_props, 0, sizeof(sec_props));
+ sec_props.min_ssf = 0;
+ sec_props.max_ssf = 0; /* don't allow real SASL
+ * security layer */
+ if (*sasl_opts_val == 0) {
+ sec_props.security_flags = 0;
+ } else {
+ sec_props.security_flags =
+ xsasl_cyrus_security_parse_opts(sasl_opts_val);
+ if (sec_props.security_flags == 0) {
+ msg_warn("bad per-session SASL security properties");
+ return (XSASL_AUTH_FAIL);
+ }
+ }
+ sec_props.maxbufsize = 0;
+ sec_props.property_names = 0;
+ sec_props.property_values = 0;
+
+ if ((sasl_status = sasl_setprop(server->sasl_conn, SASL_SEC_PROPS,
+ &sec_props)) != SASL_OK) {
+ msg_warn("SASL per-connection security setup; %s",
+ xsasl_cyrus_strerror(sasl_status));
+ return (XSASL_AUTH_FAIL);
+ }
+ return (XSASL_AUTH_OK);
+}
+
+/* xsasl_cyrus_server_get_mechanism_list - get available mechanisms */
+
+static const char *xsasl_cyrus_server_get_mechanism_list(XSASL_SERVER *xp)
+{
+ const char *myname = "xsasl_cyrus_server_get_mechanism_list";
+ XSASL_CYRUS_SERVER *server = (XSASL_CYRUS_SERVER *) xp;
+ MECHANISM_TYPE mechanism_list;
+ MECHANISM_COUNT_TYPE mechanism_count;
+ int sasl_status;
+
+ /*
+ * Get the list of authentication mechanisms.
+ */
+#define UNSUPPORTED_USER ((char *) 0)
+#define IGNORE_MECHANISM_LEN ((unsigned *) 0)
+
+ if ((sasl_status = sasl_listmech(server->sasl_conn, UNSUPPORTED_USER,
+ "", " ", "",
+ &mechanism_list,
+ IGNORE_MECHANISM_LEN,
+ &mechanism_count)) != SASL_OK) {
+ msg_warn("%s: %s", myname, xsasl_cyrus_strerror(sasl_status));
+ return (0);
+ }
+ if (mechanism_count <= 0) {
+ msg_warn("%s: no applicable SASL mechanisms", myname);
+ return (0);
+ }
+ server->mechanism_list = mystrdup(mechanism_list);
+#if SASL_VERSION_MAJOR < 2
+ /* SASL version 1 doesn't free memory that it allocates. */
+ free(mechanism_list);
+#endif
+ return (server->mechanism_list);
+}
+
+/* xsasl_cyrus_server_free - destroy server instance */
+
+static void xsasl_cyrus_server_free(XSASL_SERVER *xp)
+{
+ XSASL_CYRUS_SERVER *server = (XSASL_CYRUS_SERVER *) xp;
+
+ sasl_dispose(&server->sasl_conn);
+ vstring_free(server->decoded);
+ if (server->username)
+ myfree(server->username);
+ if (server->mechanism_list)
+ myfree(server->mechanism_list);
+ myfree((void *) server);
+}
+
+/* xsasl_cyrus_server_auth_response - encode server first/next response */
+
+static int xsasl_cyrus_server_auth_response(int sasl_status,
+ SERVEROUT_TYPE serverout,
+ unsigned serveroutlen,
+ VSTRING *reply)
+{
+ const char *myname = "xsasl_cyrus_server_auth_response";
+ unsigned enc_length;
+ unsigned enc_length_out;
+
+ /*
+ * Encode the server first/next non-error response; otherwise return the
+ * unencoded error text that corresponds to the SASL error status.
+ *
+ * Regarding the hairy expression below: output from sasl_encode64() comes
+ * in multiples of four bytes for each triple of input bytes, plus four
+ * bytes for any incomplete last triple, plus one byte for the null
+ * terminator.
+ */
+ if (sasl_status == SASL_OK) {
+ vstring_strcpy(reply, "");
+ return (XSASL_AUTH_DONE);
+ } else if (sasl_status == SASL_CONTINUE) {
+ if (msg_verbose)
+ msg_info("%s: uncoded server challenge: %.*s",
+ myname, (int) serveroutlen, serverout);
+ enc_length = ((serveroutlen + 2) / 3) * 4 + 1;
+ VSTRING_RESET(reply); /* Fix 200512 */
+ VSTRING_SPACE(reply, enc_length);
+ if ((sasl_status = sasl_encode64(serverout, serveroutlen,
+ STR(reply), vstring_avail(reply),
+ &enc_length_out)) != SASL_OK)
+ msg_panic("%s: sasl_encode64 botch: %s",
+ myname, xsasl_cyrus_strerror(sasl_status));
+ return (XSASL_AUTH_MORE);
+ } else {
+ if (sasl_status == SASL_NOUSER) /* privacy */
+ sasl_status = SASL_BADAUTH;
+ vstring_strcpy(reply, xsasl_cyrus_strerror(sasl_status));
+ switch (sasl_status) {
+ case SASL_FAIL:
+ case SASL_NOMEM:
+ case SASL_TRYAGAIN:
+ case SASL_UNAVAIL:
+ return XSASL_AUTH_TEMP;
+ default:
+ return (XSASL_AUTH_FAIL);
+ }
+ }
+}
+
+/* xsasl_cyrus_server_first - per-session authentication */
+
+int xsasl_cyrus_server_first(XSASL_SERVER *xp, const char *sasl_method,
+ const char *init_response, VSTRING *reply)
+{
+ const char *myname = "xsasl_cyrus_server_first";
+ XSASL_CYRUS_SERVER *server = (XSASL_CYRUS_SERVER *) xp;
+ char *dec_buffer;
+ unsigned dec_length;
+ unsigned reply_len;
+ unsigned serveroutlen;
+ int sasl_status;
+ SERVEROUT_TYPE serverout = 0;
+ int xsasl_status;
+
+#if SASL_VERSION_MAJOR < 2
+ const char *errstr = 0;
+
+#endif
+
+#define IFELSE(e1,e2,e3) ((e1) ? (e2) : (e3))
+
+ if (msg_verbose)
+ msg_info("%s: sasl_method %s%s%s", myname, sasl_method,
+ IFELSE(init_response, ", init_response ", ""),
+ IFELSE(init_response, init_response, ""));
+
+ /*
+ * SASL authentication protocol start-up. Process any initial client
+ * response that was sent along in the AUTH command.
+ */
+ if (init_response) {
+ reply_len = strlen(init_response);
+ VSTRING_RESET(server->decoded); /* Fix 200512 */
+ VSTRING_SPACE(server->decoded, reply_len);
+ if ((sasl_status = SASL_DECODE64(init_response, reply_len,
+ dec_buffer = STR(server->decoded),
+ vstring_avail(server->decoded),
+ &dec_length)) != SASL_OK) {
+ vstring_strcpy(reply, xsasl_cyrus_strerror(sasl_status));
+ return (XSASL_AUTH_FORM);
+ }
+ if (msg_verbose)
+ msg_info("%s: decoded initial response %s", myname, dec_buffer);
+ } else {
+ dec_buffer = 0;
+ dec_length = 0;
+ }
+ sasl_status = SASL_SERVER_START(server->sasl_conn, sasl_method, dec_buffer,
+ dec_length, &serverout,
+ &serveroutlen, &errstr);
+ xsasl_status = xsasl_cyrus_server_auth_response(sasl_status, serverout,
+ serveroutlen, reply);
+#if SASL_VERSION_MAJOR < 2
+ /* SASL version 1 doesn't free memory that it allocates. */
+ free(serverout);
+#endif
+ return (xsasl_status);
+}
+
+/* xsasl_cyrus_server_next - continue authentication */
+
+static int xsasl_cyrus_server_next(XSASL_SERVER *xp, const char *request,
+ VSTRING *reply)
+{
+ const char *myname = "xsasl_cyrus_server_next";
+ XSASL_CYRUS_SERVER *server = (XSASL_CYRUS_SERVER *) xp;
+ unsigned dec_length;
+ unsigned request_len;
+ unsigned serveroutlen;
+ int sasl_status;
+ SERVEROUT_TYPE serverout = 0;
+ int xsasl_status;
+
+#if SASL_VERSION_MAJOR < 2
+ const char *errstr = 0;
+
+#endif
+
+ request_len = strlen(request);
+ VSTRING_RESET(server->decoded); /* Fix 200512 */
+ VSTRING_SPACE(server->decoded, request_len);
+ if ((sasl_status = SASL_DECODE64(request, request_len,
+ STR(server->decoded),
+ vstring_avail(server->decoded),
+ &dec_length)) != SASL_OK) {
+ vstring_strcpy(reply, xsasl_cyrus_strerror(sasl_status));
+ return (XSASL_AUTH_FORM);
+ }
+ if (msg_verbose)
+ msg_info("%s: decoded response: %.*s",
+ myname, (int) dec_length, STR(server->decoded));
+ sasl_status = SASL_SERVER_STEP(server->sasl_conn, STR(server->decoded),
+ dec_length, &serverout,
+ &serveroutlen, &errstr);
+ xsasl_status = xsasl_cyrus_server_auth_response(sasl_status, serverout,
+ serveroutlen, reply);
+#if SASL_VERSION_MAJOR < 2
+ /* SASL version 1 doesn't free memory that it allocates. */
+ free(serverout);
+#endif
+ return (xsasl_status);
+}
+
+/* xsasl_cyrus_server_get_username - get authenticated username */
+
+static const char *xsasl_cyrus_server_get_username(XSASL_SERVER *xp)
+{
+ const char *myname = "xsasl_cyrus_server_get_username";
+ XSASL_CYRUS_SERVER *server = (XSASL_CYRUS_SERVER *) xp;
+ VOID_SERVEROUT_TYPE serverout = 0;
+ int sasl_status;
+
+ /*
+ * XXX Do not free(serverout).
+ */
+ sasl_status = sasl_getprop(server->sasl_conn, SASL_USERNAME, &serverout);
+ if (sasl_status != SASL_OK || serverout == 0) {
+ msg_warn("%s: sasl_getprop SASL_USERNAME botch: %s",
+ myname, xsasl_cyrus_strerror(sasl_status));
+ return (0);
+ }
+ if (server->username)
+ myfree(server->username);
+ server->username = mystrdup(serverout);
+ printable(server->username, '?');
+ return (server->username);
+}
+
+#endif