*
* Authentication functions for CUPS.
*
- * Copyright 2007-2011 by Apple Inc.
+ * Copyright 2007-2013 by Apple Inc.
* Copyright 1997-2007 by Easy Software Products.
*
* This file contains Kerberos support code, copyright 2006 by
*
* Contents:
*
- * cupsDoAuthentication() - Authenticate a request.
- * cups_get_gssname() - Get GSSAPI name for authentication.
- * cups_gss_printf() - Show error messages from GSSAPI...
- * cups_local_auth() - Get the local authorization certificate if
- * available/applicable...
+ * cupsDoAuthentication() - Authenticate a request.
+ * _cupsSetNegotiateAuthString() - Set the Kerberos authentication string.
+ * cups_gss_acquire() - Kerberos credentials callback.
+ * cups_gss_getname() - Get CUPS service credentials for
+ * authentication.
+ * cups_gss_printf() - Show debug error messages from GSSAPI.
+ * cups_local_auth() - Get the local authorization certificate if
+ * available/applicable.
*/
/*
*/
#ifdef HAVE_GSSAPI
-static gss_name_t cups_get_gssname(http_t *http, const char *service_name);
+# ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
+# ifdef HAVE_GSS_GSSAPI_SPI_H
+# include <GSS/gssapi_spi.h>
+# else
+# define GSS_AUTH_IDENTITY_TYPE_1 1
+# define gss_acquire_cred_ex_f __ApplePrivate_gss_acquire_cred_ex_f
+typedef struct gss_auth_identity
+{
+ uint32_t type;
+ uint32_t flags;
+ char *username;
+ char *realm;
+ char *password;
+ gss_buffer_t *credentialsRef;
+} gss_auth_identity_desc;
+extern OM_uint32 gss_acquire_cred_ex_f(gss_status_id_t, const gss_name_t,
+ OM_uint32, OM_uint32, const gss_OID,
+ gss_cred_usage_t, gss_auth_identity_t,
+ void *, void (*)(void *, OM_uint32,
+ gss_status_id_t,
+ gss_cred_id_t,
+ gss_OID_set,
+ OM_uint32));
+# endif /* HAVE_GSS_GSSAPI_SPI_H */
+# include <dispatch/dispatch.h>
+typedef struct _cups_gss_acquire_s /* Acquire callback data */
+{
+ dispatch_semaphore_t sem; /* Synchronization semaphore */
+ OM_uint32 major; /* Returned status code */
+ gss_cred_id_t creds; /* Returned credentials */
+} _cups_gss_acquire_t;
+
+static void cups_gss_acquire(void *ctx, OM_uint32 major,
+ gss_status_id_t status,
+ gss_cred_id_t creds, gss_OID_set oids,
+ OM_uint32 time_rec);
+# endif /* HAVE_GSS_ACQUIRE_CRED_EX_F */
+static gss_name_t cups_gss_getname(http_t *http, const char *service_name);
# ifdef DEBUG
static void cups_gss_printf(OM_uint32 major_status, OM_uint32 minor_status,
const char *message);
/*
* 'cupsDoAuthentication()' - Authenticate a request.
*
- * This function should be called in response to a @code HTTP_UNAUTHORIZED@
+ * This function should be called in response to a @code HTTP_STATUS_UNAUTHORIZED@
* status, prior to resubmitting your request.
*
- * @since CUPS 1.1.20/Mac OS X 10.4@
+ * @since CUPS 1.1.20/OS X 10.4@
*/
int /* O - 0 on success, -1 on error */
const char *method, /* I - Request method ("GET", "POST", "PUT") */
const char *resource) /* I - Resource path */
{
- const char *password; /* Password string */
+ const char *password, /* Password string */
+ *www_auth; /* WWW-Authenticate header */
char prompt[1024], /* Prompt for user */
realm[HTTP_MAX_VALUE], /* realm="xyz" string */
nonce[HTTP_MAX_VALUE]; /* nonce="xyz" string */
DEBUG_printf(("2cupsDoAuthentication: authstring=\"%s\"",
http->authstring));
- if (http->status == HTTP_UNAUTHORIZED)
+ if (http->status == HTTP_STATUS_UNAUTHORIZED)
http->digest_tries ++;
return (0);
}
else if (localauth == -1)
{
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
return (-1); /* Error or canceled */
}
}
* Nope, see if we should retry the current username:password...
*/
+ www_auth = http->fields[HTTP_FIELD_WWW_AUTHENTICATE];
+
if ((http->digest_tries > 1 || !http->userpass[0]) &&
- (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Basic", 5) ||
- !strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6)))
+ (!_cups_strncasecmp(www_auth, "Basic", 5) ||
+ !_cups_strncasecmp(www_auth, "Digest", 6)))
{
/*
* Nope - get a new password from the user...
*/
+ char default_username[HTTP_MAX_VALUE];
+ /* Default username */
+
cg = _cupsGlobals();
if (!cg->lang_default)
cg->lang_default = cupsLangDefault();
+ if (httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "username",
+ default_username))
+ cupsSetUser(default_username);
+
snprintf(prompt, sizeof(prompt),
_cupsLangString(cg->lang_default, _("Password for %s on %s? ")),
cupsUser(),
http->hostname[0] == '/' ? "localhost" : http->hostname);
- http->digest_tries = strncasecmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE],
- "Digest", 5) != 0;
+ http->digest_tries = _cups_strncasecmp(www_auth, "Digest", 6) != 0;
http->userpass[0] = '\0';
if ((password = cupsGetPassword2(prompt, http, method, resource)) == NULL)
{
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
return (-1);
}
snprintf(http->userpass, sizeof(http->userpass), "%s:%s", cupsUser(),
password);
}
- else if (http->status == HTTP_UNAUTHORIZED)
+ else if (http->status == HTTP_STATUS_UNAUTHORIZED)
http->digest_tries ++;
- if (http->status == HTTP_UNAUTHORIZED && http->digest_tries >= 3)
+ if (http->status == HTTP_STATUS_UNAUTHORIZED && http->digest_tries >= 3)
{
DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)",
http->digest_tries));
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
return (-1);
}
*/
#ifdef HAVE_GSSAPI
- if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9))
+ if (!_cups_strncasecmp(www_auth, "Negotiate", 9))
{
/*
* Kerberos authentication...
*/
- if (_cupsSetNegotiateAuthString(http))
+ if (_cupsSetNegotiateAuthString(http, method, resource))
{
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
return (-1);
}
}
else
#endif /* HAVE_GSSAPI */
- if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Basic", 5))
+ if (!_cups_strncasecmp(www_auth, "Basic", 5))
{
/*
* Basic authentication...
(int)strlen(http->userpass));
httpSetAuthString(http, "Basic", encode);
}
- else if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6))
+ else if (!_cups_strncasecmp(www_auth, "Digest", 6))
{
/*
* Digest authentication...
else
{
DEBUG_printf(("1cupsDoAuthentication: Unknown auth type: \"%s\"",
- http->fields[HTTP_FIELD_WWW_AUTHENTICATE]));
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ www_auth));
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
return (-1);
}
int /* O - 0 on success, -1 on error */
_cupsSetNegotiateAuthString(
- http_t *http) /* I - Connection to server */
+ http_t *http, /* I - Connection to server */
+ const char *method, /* I - Request method ("GET", "POST", "PUT") */
+ const char *resource) /* I - Resource path */
{
OM_uint32 minor_status, /* Minor status code */
major_status; /* Major status code */
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
- /* Output token */
- char *gss_service_name; /* GSS service name */
+ /* Output token */
+
+ (void)method;
+ (void)resource;
# ifdef __APPLE__
/*
if (http->gssname == GSS_C_NO_NAME)
{
- if ((gss_service_name = getenv("CUPS_GSSSERVICENAME")) == NULL)
- gss_service_name = CUPS_DEFAULT_GSSSERVICENAME;
- else
- DEBUG_puts("2_cupsSetNegotiateAuthString: GSS service name set via "
- "environment variable");
-
- http->gssname = cups_get_gssname(http, gss_service_name);
+ http->gssname = cups_gss_getname(http, _cupsGSSServiceName());
}
if (http->gssctx != GSS_C_NO_CONTEXT)
http->gssctx = GSS_C_NO_CONTEXT;
}
- major_status = gss_init_sec_context(&minor_status, GSS_C_NO_CREDENTIAL,
- &http->gssctx,
- http->gssname, http->gssmech,
-#ifdef GSS_C_DELEG_POLICY_FLAG
- GSS_C_DELEG_POLICY_FLAG |
-#endif /* GSS_C_DELEG_POLICY_FLAG */
- GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG,
- GSS_C_INDEFINITE,
- GSS_C_NO_CHANNEL_BINDINGS,
- GSS_C_NO_BUFFER, &http->gssmech,
- &output_token, NULL, NULL);
+ major_status = gss_init_sec_context(&minor_status, GSS_C_NO_CREDENTIAL,
+ &http->gssctx,
+ http->gssname, http->gssmech,
+ GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG,
+ GSS_C_INDEFINITE,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ GSS_C_NO_BUFFER, &http->gssmech,
+ &output_token, NULL, NULL);
+
+#ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
+ if (major_status == GSS_S_NO_CRED)
+ {
+ /*
+ * Ask the user for credentials...
+ */
+
+ char prompt[1024], /* Prompt for user */
+ userbuf[256]; /* Kerberos username */
+ const char *username, /* Username string */
+ *password; /* Password string */
+ _cups_gss_acquire_t data; /* Callback data */
+ gss_auth_identity_desc identity; /* Kerberos user identity */
+ _cups_globals_t *cg = _cupsGlobals();
+ /* Per-thread global data */
+
+ if (!cg->lang_default)
+ cg->lang_default = cupsLangDefault();
+
+ snprintf(prompt, sizeof(prompt),
+ _cupsLangString(cg->lang_default, _("Password for %s on %s? ")),
+ cupsUser(), http->gsshost);
+
+ if ((password = cupsGetPassword2(prompt, http, method, resource)) == NULL)
+ return (-1);
+
+ /*
+ * Try to acquire credentials...
+ */
+
+ username = cupsUser();
+ if (!strchr(username, '@'))
+ {
+ snprintf(userbuf, sizeof(userbuf), "%s@%s", username, http->gsshost);
+ username = userbuf;
+ }
+
+ identity.type = GSS_AUTH_IDENTITY_TYPE_1;
+ identity.flags = 0;
+ identity.username = (char *)username;
+ identity.realm = (char *)"";
+ identity.password = (char *)password;
+ identity.credentialsRef = NULL;
+
+ data.sem = dispatch_semaphore_create(0);
+ data.major = 0;
+ data.creds = NULL;
+
+ if (data.sem)
+ {
+ major_status = gss_acquire_cred_ex_f(NULL, GSS_C_NO_NAME, 0,
+ GSS_C_INDEFINITE, GSS_KRB5_MECHANISM,
+ GSS_C_INITIATE, &identity, &data,
+ cups_gss_acquire);
+
+ if (major_status == GSS_S_COMPLETE)
+ {
+ dispatch_semaphore_wait(data.sem, DISPATCH_TIME_FOREVER);
+ major_status = data.major;
+ }
+
+ dispatch_release(data.sem);
+
+ if (major_status == GSS_S_COMPLETE)
+ {
+ OM_uint32 release_minor; /* Minor status from releasing creds */
+
+ major_status = gss_init_sec_context(&minor_status, data.creds,
+ &http->gssctx,
+ http->gssname, http->gssmech,
+ GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG,
+ GSS_C_INDEFINITE,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ GSS_C_NO_BUFFER, &http->gssmech,
+ &output_token, NULL, NULL);
+ gss_release_cred(&release_minor, &data.creds);
+ }
+ }
+ }
+#endif /* HAVE_GSS_ACQUIRED_CRED_EX_F */
if (GSS_ERROR(major_status))
{
return (-1);
}
- if (major_status == GSS_S_CONTINUE_NEEDED)
+#ifdef DEBUG
+ else if (major_status == GSS_S_CONTINUE_NEEDED)
cups_gss_printf(major_status, minor_status,
"_cupsSetNegotiateAuthString: Continuation needed!");
+#endif /* DEBUG */
if (output_token.length > 0 && output_token.length <= 65536)
{
authsize = sizeof(http->_authstring);
}
- strcpy(http->authstring, "Negotiate ");
+ strlcpy(http->authstring, "Negotiate ", authsize);
httpEncode64_2(http->authstring + 10, authsize - 10, output_token.value,
output_token.length);
}
+# ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
/*
- * 'cups_get_gssname()' - Get CUPS service credentials for authentication.
+ * 'cups_gss_acquire()' - Kerberos credentials callback.
+ */
+static void
+cups_gss_acquire(
+ void *ctx, /* I - Caller context */
+ OM_uint32 major, /* I - Major error code */
+ gss_status_id_t status, /* I - Status (unused) */
+ gss_cred_id_t creds, /* I - Credentials (if any) */
+ gss_OID_set oids, /* I - Mechanism OIDs (unused) */
+ OM_uint32 time_rec) /* I - Timestamp (unused) */
+{
+ uint32_t min; /* Minor error code */
+ _cups_gss_acquire_t *data; /* Callback data */
+
+
+ (void)status;
+ (void)time_rec;
+
+ data = (_cups_gss_acquire_t *)ctx;
+ data->major = major;
+ data->creds = creds;
+
+ gss_release_oid_set(&min, &oids);
+ dispatch_semaphore_signal(data->sem);
+}
+# endif /* HAVE_GSS_ACQUIRE_CRED_EX_F */
+
+
+/*
+ * 'cups_gss_getname()' - Get CUPS service credentials for authentication.
*/
static gss_name_t /* O - Server name */
-cups_get_gssname(
+cups_gss_getname(
http_t *http, /* I - Connection to server */
const char *service_name) /* I - Service name */
{
OM_uint32 major_status, /* Major status code */
minor_status; /* Minor status code */
gss_name_t server_name; /* Server name */
- char buf[1024], /* Name buffer */
- fqdn[HTTP_MAX_URI]; /* Server name buffer */
+ char buf[1024]; /* Name buffer */
- DEBUG_printf(("7cups_get_gssname(http=%p, service_name=\"%s\")", http,
+ DEBUG_printf(("7cups_gss_getname(http=%p, service_name=\"%s\")", http,
service_name));
* Get the hostname...
*/
- httpGetHostname(http, fqdn, sizeof(fqdn));
+ if (!http->gsshost[0])
+ {
+ httpGetHostname(http, http->gsshost, sizeof(http->gsshost));
- if (!strcmp(fqdn, "localhost"))
- httpGetHostname(NULL, fqdn, sizeof(fqdn));
+ if (!strcmp(http->gsshost, "localhost"))
+ {
+ if (gethostname(http->gsshost, sizeof(http->gsshost)) < 0)
+ {
+ DEBUG_printf(("1cups_gss_getname: gethostname() failed: %s",
+ strerror(errno)));
+ http->gsshost[0] = '\0';
+ return (NULL);
+ }
+
+ if (!strchr(http->gsshost, '.'))
+ {
+ /*
+ * The hostname is not a FQDN, so look it up...
+ */
+
+ struct hostent *host; /* Host entry to get FQDN */
+
+ if ((host = gethostbyname(http->gsshost)) != NULL && host->h_name)
+ {
+ /*
+ * Use the resolved hostname...
+ */
+
+ strlcpy(http->gsshost, host->h_name, sizeof(http->gsshost));
+ }
+ else
+ {
+ DEBUG_printf(("1cups_gss_getname: gethostbyname(\"%s\") failed.",
+ http->gsshost));
+ http->gsshost[0] = '\0';
+ return (NULL);
+ }
+ }
+ }
+ }
/*
- * Get a server name we can use for authentication purposes...
+ * Get a service name we can use for authentication purposes...
*/
- snprintf(buf, sizeof(buf), "%s@%s", service_name, fqdn);
+ snprintf(buf, sizeof(buf), "%s@%s", service_name, http->gsshost);
- DEBUG_printf(("9cups_get_gssname: Looking up %s...", buf));
+ DEBUG_printf(("8cups_gss_getname: Looking up \"%s\".", buf));
token.value = buf;
token.length = strlen(buf);
if (GSS_ERROR(major_status))
{
cups_gss_printf(major_status, minor_status,
- "cups_get_gssname: gss_import_name() failed");
+ "cups_gss_getname: gss_import_name() failed");
return (NULL);
}
# ifdef DEBUG
/*
- * 'cups_gss_printf()' - Show debug error messages from GSSAPI...
+ * 'cups_gss_printf()' - Show debug error messages from GSSAPI.
*/
static void
/*
* 'cups_local_auth()' - Get the local authorization certificate if
- * available/applicable...
+ * available/applicable.
*/
static int /* O - 0 if available */
int pid; /* Current process ID */
FILE *fp; /* Certificate file */
char trc[16], /* Try Root Certificate parameter */
- filename[1024], /* Certificate filename */
- certificate[33];/* Certificate string */
+ filename[1024]; /* Certificate filename */
_cups_globals_t *cg = _cupsGlobals(); /* Global data */
# if defined(HAVE_AUTHORIZATION_H)
OSStatus status; /* Status */
*/
if (!httpAddrLocalhost(http->hostaddr) &&
- strcasecmp(http->hostname, "localhost") != 0)
+ _cups_strcasecmp(http->hostname, "localhost") != 0)
{
DEBUG_puts("8cups_local_auth: Not a local connection!");
return (1);
DEBUG_printf(("9cups_local_auth: Unable to open file %s: %s",
filename, strerror(errno)));
-#ifdef HAVE_GSSAPI
+# ifdef HAVE_GSSAPI
if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9))
{
/*
return (1);
}
-#endif /* HAVE_GSSAPI */
+# endif /* HAVE_GSSAPI */
+# ifdef HAVE_AUTHORIZATION_H
+ if (httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey",
+ auth_key, sizeof(auth_key)))
+ {
+ /*
+ * Don't use the root certificate as a replacement for an authkey...
+ */
+
+ return (1);
+ }
+# endif /* HAVE_AUTHORIZATION_H */
if (!httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "trc", trc,
sizeof(trc)))
{
* Read the certificate from the file...
*/
- fgets(certificate, sizeof(certificate), fp);
+ char certificate[33], /* Certificate string */
+ *certptr; /* Pointer to certificate string */
+
+ certptr = fgets(certificate, sizeof(certificate), fp);
fclose(fp);
- /*
- * Set the authorization string and return...
- */
+ if (certptr)
+ {
+ /*
+ * Set the authorization string and return...
+ */
- httpSetAuthString(http, "Local", certificate);
+ httpSetAuthString(http, "Local", certificate);
- DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
- http->authstring));
+ DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
+ http->authstring));
- return (0);
+ return (0);
+ }
}
return (1);
projects / thirdparty / cups.git / blobdiff