/*
* "$Id$"
*
- * Authentication functions for the Common UNIX Printing System (CUPS).
+ * Authentication functions for CUPS.
*
- * Copyright 1997-2006 by Easy Software Products.
+ * Copyright 2007-2014 by Apple Inc.
+ * Copyright 1997-2007 by Easy Software Products.
*
- * These coded instructions, statements, and computer programs are the
- * property of Easy Software Products and are protected by Federal
- * copyright law. Distribution and use rights are outlined in the file
- * "LICENSE.txt" which should have been included with this file. If this
- * file is missing or damaged please contact Easy Software Products
- * at:
+ * This file contains Kerberos support code, copyright 2006 by
+ * Jelmer Vernooij.
*
- * Attn: CUPS Licensing Information
- * Easy Software Products
- * 44141 Airport View Drive, Suite 204
- * Hollywood, Maryland 20636 USA
+ * These coded instructions, statements, and computer programs are the
+ * property of Apple Inc. and are protected by Federal copyright
+ * law. Distribution and use rights are outlined in the file "LICENSE.txt"
+ * which should have been included with this file. If this file is
+ * file is missing or damaged, see the license at "http://www.cups.org/".
*
- * Voice: (301) 373-9600
- * EMail: cups-info@cups.org
- * WWW: http://www.cups.org
- *
- * This file is subject to the Apple OS-Developed Software exception.
- *
- * Contents:
- *
- * cupsDoAuthentication() - Authenticate a request.
- * cups_local_auth() - Get the local authorization certificate if
- * available/applicable...
+ * This file is subject to the Apple OS-Developed Software exception.
*/
/*
* Include necessary headers...
*/
-#include "globals.h"
-#include "debug.h"
-#include <stdlib.h>
-#include <ctype.h>
-#include <errno.h>
+#include "cups-private.h"
#include <fcntl.h>
#include <sys/stat.h>
#if defined(WIN32) || defined(__EMX__)
# include <unistd.h>
#endif /* WIN32 || __EMX__ */
+#if HAVE_AUTHORIZATION_H
+# include <Security/Authorization.h>
+# ifdef HAVE_SECBASEPRIV_H
+# include <Security/SecBasePriv.h>
+# else
+extern const char *cssmErrorString(int error);
+# endif /* HAVE_SECBASEPRIV_H */
+#endif /* HAVE_AUTHORIZATION_H */
+
+#if defined(SO_PEERCRED) && defined(AF_LOCAL)
+# include <pwd.h>
+#endif /* SO_PEERCRED && AF_LOCAL */
+
/*
* Local functions...
*/
+#ifdef HAVE_GSSAPI
+# 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);
+# else
+# define cups_gss_printf(major, minor, message)
+# endif /* DEBUG */
+#endif /* HAVE_GSSAPI */
static int cups_local_auth(http_t *http);
/*
* 'cupsDoAuthentication()' - Authenticate a request.
*
- * This function should be called in response to a 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@
+ * @since CUPS 1.1.20/OS X 10.4@
*/
int /* O - 0 on success, -1 on error */
-cupsDoAuthentication(http_t *http, /* I - HTTP connection to server */
- const char *method,/* I - Request method (GET, POST, PUT) */
- const char *resource)
- /* I - Resource path */
+cupsDoAuthentication(
+ http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
+ 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 */
- encode[512]; /* Encoded username:password */
+ nonce[HTTP_MAX_VALUE]; /* nonce="xyz" string */
+ int localauth; /* Local authentication result */
+ _cups_globals_t *cg; /* Global data */
- DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")\n",
+ DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")",
http, method, resource));
- DEBUG_printf(("cupsDoAuthentication: digest_tries=%d, userpass=\"%s\"\n",
+
+ if (!http)
+ http = _cupsConnect();
+
+ if (!http || !method || !resource)
+ return (-1);
+
+ DEBUG_printf(("2cupsDoAuthentication: digest_tries=%d, userpass=\"%s\"",
http->digest_tries, http->userpass));
+ DEBUG_printf(("2cupsDoAuthentication: WWW-Authenticate=\"%s\"",
+ httpGetField(http, HTTP_FIELD_WWW_AUTHENTICATE)));
/*
* Clear the current authentication string...
*/
- http->authstring[0] = '\0';
+ httpSetAuthString(http, NULL, NULL);
/*
* See if we can do local authentication...
*/
- if (http->digest_tries < 3 && !cups_local_auth(http))
+ if (http->digest_tries < 3)
{
- DEBUG_printf(("cupsDoAuthentication: authstring=\"%s\"\n", http->authstring));
-
- if (http->status == HTTP_UNAUTHORIZED)
- http->digest_tries ++;
-
- return (0);
+ if ((localauth = cups_local_auth(http)) == 0)
+ {
+ DEBUG_printf(("2cupsDoAuthentication: authstring=\"%s\"",
+ http->authstring));
+
+ if (http->status == HTTP_STATUS_UNAUTHORIZED)
+ http->digest_tries ++;
+
+ return (0);
+ }
+ else if (localauth == -1)
+ {
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
+ return (-1); /* Error or canceled */
+ }
}
/*
* Nope, see if we should retry the current username:password...
*/
- if (http->digest_tries > 1 || !http->userpass[0])
+ www_auth = http->fields[HTTP_FIELD_WWW_AUTHENTICATE];
+
+ if ((http->digest_tries > 1 || !http->userpass[0]) &&
+ (!_cups_strncasecmp(www_auth, "Basic", 5) ||
+ !_cups_strncasecmp(www_auth, "Digest", 6)))
{
/*
* Nope - get a new password from the user...
*/
- snprintf(prompt, sizeof(prompt), _("Password for %s on %s? "), cupsUser(),
- http->hostname[0] == '/' ? "localhost" : http->hostname);
+ char default_username[HTTP_MAX_VALUE];
+ /* Default username */
- http->digest_tries = strncasecmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE],
- "Digest", 5) != 0;
- http->userpass[0] = '\0';
+ cg = _cupsGlobals();
- if ((password = cupsGetPassword(prompt)) == NULL)
- return (-1);
+ 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);
- if (!password[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_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_STATUS_UNAUTHORIZED && http->digest_tries >= 3)
+ {
+ DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)",
+ http->digest_tries));
+
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
+ return (-1);
+ }
+
/*
* Got a password; encode it for the server...
*/
- if (strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6))
+#ifdef HAVE_GSSAPI
+ if (!_cups_strncasecmp(www_auth, "Negotiate", 9))
+ {
+ /*
+ * Kerberos authentication...
+ */
+
+ if (_cupsSetNegotiateAuthString(http, method, resource))
+ {
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
+ return (-1);
+ }
+ }
+ else
+#endif /* HAVE_GSSAPI */
+ if (!_cups_strncasecmp(www_auth, "Basic", 5))
{
/*
* Basic authentication...
*/
+ char encode[256]; /* Base64 buffer */
+
+
httpEncode64_2(encode, sizeof(encode), http->userpass,
- strlen(http->userpass));
- snprintf(http->authstring, sizeof(http->authstring), "Basic %s", encode);
+ (int)strlen(http->userpass));
+ httpSetAuthString(http, "Basic", encode);
}
- else
+ else if (!_cups_strncasecmp(www_auth, "Digest", 6))
{
/*
* Digest authentication...
*/
+ char encode[33], /* MD5 buffer */
+ digest[1024]; /* Digest auth data */
+
+
httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "realm", realm);
httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "nonce", nonce);
httpMD5(cupsUser(), realm, strchr(http->userpass, ':') + 1, encode);
httpMD5Final(nonce, method, resource, encode);
- snprintf(http->authstring, sizeof(http->authstring),
- "Digest username=\"%s\", realm=\"%s\", nonce=\"%s\", "
- "uri=\"%s\", response=\"%s\"", cupsUser(), realm, nonce,
- resource, encode);
+ snprintf(digest, sizeof(digest),
+ "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", "
+ "response=\"%s\"", cupsUser(), realm, nonce, resource, encode);
+ httpSetAuthString(http, "Digest", digest);
+ }
+ else
+ {
+ DEBUG_printf(("1cupsDoAuthentication: Unknown auth type: \"%s\"",
+ www_auth));
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
+ return (-1);
+ }
+
+ DEBUG_printf(("1cupsDoAuthentication: authstring=\"%s\"", http->authstring));
+
+ return (0);
+}
+
+
+#ifdef HAVE_GSSAPI
+/*
+ * '_cupsSetNegotiateAuthString()' - Set the Kerberos authentication string.
+ */
+
+int /* O - 0 on success, -1 on error */
+_cupsSetNegotiateAuthString(
+ 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 */
+
+
+ (void)method;
+ (void)resource;
+
+# ifdef __APPLE__
+ /*
+ * If the weak-linked GSSAPI/Kerberos library is not present, don't try
+ * to use it...
+ */
+
+ if (gss_init_sec_context == NULL)
+ {
+ DEBUG_puts("1_cupsSetNegotiateAuthString: Weak-linked GSSAPI/Kerberos "
+ "framework is not present");
+ return (-1);
+ }
+# endif /* __APPLE__ */
+
+ if (http->gssname == GSS_C_NO_NAME)
+ {
+ http->gssname = cups_gss_getname(http, _cupsGSSServiceName());
+ }
+
+ if (http->gssctx != GSS_C_NO_CONTEXT)
+ {
+ gss_delete_sec_context(&minor_status, &http->gssctx, GSS_C_NO_BUFFER);
+ http->gssctx = GSS_C_NO_CONTEXT;
+ }
+
+ 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))
+ {
+ cups_gss_printf(major_status, minor_status,
+ "_cupsSetNegotiateAuthString: Unable to initialize "
+ "security context");
+ return (-1);
+ }
+
+#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)
+ {
+ /*
+ * Allocate the authorization string since Windows KDCs can have
+ * arbitrarily large credentials...
+ */
+
+ int authsize = 10 + /* "Negotiate " */
+ (int)output_token.length * 4 / 3 + 1 + 1;
+ /* Base64 + nul */
+
+ httpSetAuthString(http, NULL, NULL);
+
+ if ((http->authstring = malloc((size_t)authsize)) == NULL)
+ {
+ http->authstring = http->_authstring;
+ authsize = sizeof(http->_authstring);
+ }
+
+ strlcpy(http->authstring, "Negotiate ", authsize);
+ httpEncode64_2(http->authstring + 10, authsize - 10, output_token.value,
+ (int)output_token.length);
+
+ gss_release_buffer(&minor_status, &output_token);
}
+ else
+ {
+ DEBUG_printf(("1_cupsSetNegotiateAuthString: Kerberos credentials too "
+ "large - %d bytes!", (int)output_token.length));
+ gss_release_buffer(&minor_status, &output_token);
- DEBUG_printf(("cupsDoAuthentication: authstring=\"%s\"\n", http->authstring));
+ return (-1);
+ }
return (0);
}
+# ifdef HAVE_GSS_ACQUIRE_CRED_EX_F
+/*
+ * '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_gss_getname(
+ http_t *http, /* I - Connection to server */
+ const char *service_name) /* I - Service name */
+{
+ gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
+ /* Service token */
+ OM_uint32 major_status, /* Major status code */
+ minor_status; /* Minor status code */
+ gss_name_t server_name; /* Server name */
+ char buf[1024]; /* Name buffer */
+
+
+ DEBUG_printf(("7cups_gss_getname(http=%p, service_name=\"%s\")", http,
+ service_name));
+
+
+ /*
+ * Get the hostname...
+ */
+
+ if (!http->gsshost[0])
+ {
+ httpGetHostname(http, http->gsshost, sizeof(http->gsshost));
+
+ 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 service name we can use for authentication purposes...
+ */
+
+ snprintf(buf, sizeof(buf), "%s@%s", service_name, http->gsshost);
+
+ DEBUG_printf(("8cups_gss_getname: Looking up \"%s\".", buf));
+
+ token.value = buf;
+ token.length = strlen(buf);
+ server_name = GSS_C_NO_NAME;
+ major_status = gss_import_name(&minor_status, &token,
+ GSS_C_NT_HOSTBASED_SERVICE,
+ &server_name);
+
+ if (GSS_ERROR(major_status))
+ {
+ cups_gss_printf(major_status, minor_status,
+ "cups_gss_getname: gss_import_name() failed");
+ return (NULL);
+ }
+
+ return (server_name);
+}
+
+
+# ifdef DEBUG
+/*
+ * 'cups_gss_printf()' - Show debug error messages from GSSAPI.
+ */
+
+static void
+cups_gss_printf(OM_uint32 major_status,/* I - Major status code */
+ OM_uint32 minor_status,/* I - Minor status code */
+ const char *message) /* I - Prefix for error message */
+{
+ OM_uint32 err_major_status, /* Major status code for display */
+ err_minor_status; /* Minor status code for display */
+ OM_uint32 msg_ctx; /* Message context */
+ gss_buffer_desc major_status_string = GSS_C_EMPTY_BUFFER,
+ /* Major status message */
+ minor_status_string = GSS_C_EMPTY_BUFFER;
+ /* Minor status message */
+
+
+ msg_ctx = 0;
+ err_major_status = gss_display_status(&err_minor_status,
+ major_status,
+ GSS_C_GSS_CODE,
+ GSS_C_NO_OID,
+ &msg_ctx,
+ &major_status_string);
+
+ if (!GSS_ERROR(err_major_status))
+ gss_display_status(&err_minor_status, minor_status, GSS_C_MECH_CODE,
+ GSS_C_NULL_OID, &msg_ctx, &minor_status_string);
+
+ DEBUG_printf(("1%s: %s, %s", message, (char *)major_status_string.value,
+ (char *)minor_status_string.value));
+
+ gss_release_buffer(&err_minor_status, &major_status_string);
+ gss_release_buffer(&err_minor_status, &minor_status_string);
+}
+# endif /* DEBUG */
+#endif /* HAVE_GSSAPI */
+
+
/*
* 'cups_local_auth()' - Get the local authorization certificate if
- * available/applicable...
+ * available/applicable.
*/
-static int /* O - 0 if available, -1 if not */
+static int /* O - 0 if available */
+ /* 1 if not available */
+ /* -1 error */
cups_local_auth(http_t *http) /* I - HTTP connection to server */
{
#if defined(WIN32) || defined(__EMX__)
* Currently WIN32 and OS-2 do not support the CUPS server...
*/
- return (-1);
+ return (1);
#else
- int pid; /* Current process ID */
- FILE *fp; /* Certificate file */
- char filename[1024], /* Certificate filename */
- certificate[33]; /* Certificate string */
+ int pid; /* Current process ID */
+ FILE *fp; /* Certificate file */
+ char trc[16], /* Try Root Certificate parameter */
+ filename[1024]; /* Certificate filename */
_cups_globals_t *cg = _cupsGlobals(); /* Global data */
-
-
- DEBUG_printf(("cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"\n",
+# if defined(HAVE_AUTHORIZATION_H)
+ OSStatus status; /* Status */
+ AuthorizationItem auth_right; /* Authorization right */
+ AuthorizationRights auth_rights; /* Authorization rights */
+ AuthorizationFlags auth_flags; /* Authorization flags */
+ AuthorizationExternalForm auth_extrn; /* Authorization ref external */
+ char auth_key[1024]; /* Buffer */
+ char buffer[1024]; /* Buffer */
+# endif /* HAVE_AUTHORIZATION_H */
+
+
+ DEBUG_printf(("7cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"",
http, httpAddrString(http->hostaddr, filename, sizeof(filename)), http->hostname));
/*
*/
if (!httpAddrLocalhost(http->hostaddr) &&
- strcasecmp(http->hostname, "localhost") != 0)
+ _cups_strcasecmp(http->hostname, "localhost") != 0)
{
- DEBUG_puts("cups_local_auth: Not a local connection!");
- return (-1);
+ DEBUG_puts("8cups_local_auth: Not a local connection!");
+ return (1);
+ }
+
+# if defined(HAVE_AUTHORIZATION_H)
+ /*
+ * Delete any previous authorization reference...
+ */
+
+ if (http->auth_ref)
+ {
+ AuthorizationFree(http->auth_ref, kAuthorizationFlagDefaults);
+ http->auth_ref = NULL;
+ }
+
+ if (!getenv("GATEWAY_INTERFACE") &&
+ httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey",
+ auth_key, sizeof(auth_key)))
+ {
+ status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment,
+ kAuthorizationFlagDefaults, &http->auth_ref);
+ if (status != errAuthorizationSuccess)
+ {
+ DEBUG_printf(("8cups_local_auth: AuthorizationCreate() returned %d (%s)",
+ (int)status, cssmErrorString(status)));
+ return (-1);
+ }
+
+ auth_right.name = auth_key;
+ auth_right.valueLength = 0;
+ auth_right.value = NULL;
+ auth_right.flags = 0;
+
+ auth_rights.count = 1;
+ auth_rights.items = &auth_right;
+
+ auth_flags = kAuthorizationFlagDefaults |
+ kAuthorizationFlagPreAuthorize |
+ kAuthorizationFlagInteractionAllowed |
+ kAuthorizationFlagExtendRights;
+
+ status = AuthorizationCopyRights(http->auth_ref, &auth_rights,
+ kAuthorizationEmptyEnvironment,
+ auth_flags, NULL);
+ if (status == errAuthorizationSuccess)
+ status = AuthorizationMakeExternalForm(http->auth_ref, &auth_extrn);
+
+ if (status == errAuthorizationSuccess)
+ {
+ /*
+ * Set the authorization string and return...
+ */
+
+ httpEncode64_2(buffer, sizeof(buffer), (void *)&auth_extrn,
+ sizeof(auth_extrn));
+
+ httpSetAuthString(http, "AuthRef", buffer);
+
+ DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
+ http->authstring));
+ return (0);
+ }
+ else if (status == errAuthorizationCanceled)
+ return (-1);
+
+ DEBUG_printf(("9cups_local_auth: AuthorizationCopyRights() returned %d (%s)",
+ (int)status, cssmErrorString(status)));
+
+ /*
+ * Fall through to try certificates...
+ */
}
+# endif /* HAVE_AUTHORIZATION_H */
+
+# if defined(SO_PEERCRED) && defined(AF_LOCAL)
+ /*
+ * See if we can authenticate using the peer credentials provided over a
+ * domain socket; if so, specify "PeerCred username" as the authentication
+ * information...
+ */
+
+ if (
+# ifdef HAVE_GSSAPI
+ strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9) &&
+# endif /* HAVE_GSSAPI */
+# ifdef HAVE_AUTHORIZATION_H
+ !httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey",
+ auth_key, sizeof(auth_key)) &&
+# endif /* HAVE_AUTHORIZATION_H */
+ http->hostaddr->addr.sa_family == AF_LOCAL &&
+ !getenv("GATEWAY_INTERFACE")) /* Not via CGI programs... */
+ {
+ /*
+ * Verify that the current cupsUser() matches the current UID...
+ */
+
+ struct passwd *pwd; /* Password information */
+ const char *username; /* Current username */
+
+ username = cupsUser();
+
+ if ((pwd = getpwnam(username)) != NULL && pwd->pw_uid == getuid())
+ {
+ httpSetAuthString(http, "PeerCred", username);
+
+ DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
+ http->authstring));
+
+ return (0);
+ }
+ }
+# endif /* SO_PEERCRED && AF_LOCAL */
/*
* Try opening a certificate file for this PID. If that fails,
snprintf(filename, sizeof(filename), "%s/certs/%d", cg->cups_statedir, pid);
if ((fp = fopen(filename, "r")) == NULL && pid > 0)
{
- DEBUG_printf(("cups_local_auth: Unable to open file %s: %s\n",
+ /*
+ * No certificate for this PID; see if we can get the root certificate...
+ */
+
+ DEBUG_printf(("9cups_local_auth: Unable to open file %s: %s",
filename, strerror(errno)));
+# ifdef HAVE_GSSAPI
+ if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9))
+ {
+ /*
+ * Kerberos required, don't try the root certificate...
+ */
+
+ return (1);
+ }
+# 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)))
+ {
+ /*
+ * Scheduler doesn't want us to use the root certificate...
+ */
+
+ return (1);
+ }
+
snprintf(filename, sizeof(filename), "%s/certs/0", cg->cups_statedir);
fp = fopen(filename, "r");
}
- if (fp == NULL)
+ if (fp)
{
- DEBUG_printf(("cups_local_auth: Unable to open file %s: %s\n",
- filename, strerror(errno)));
- return (-1);
- }
+ /*
+ * Read the certificate from the file...
+ */
- /*
- * Read the certificate from the file...
- */
+ char certificate[33], /* Certificate string */
+ *certptr; /* Pointer to certificate string */
- fgets(certificate, sizeof(certificate), fp);
- fclose(fp);
+ certptr = fgets(certificate, sizeof(certificate), fp);
+ fclose(fp);
- /*
- * Set the authorization string and return...
- */
+ if (certptr)
+ {
+ /*
+ * Set the authorization string and return...
+ */
- snprintf(http->authstring, sizeof(http->authstring), "Local %s", certificate);
+ httpSetAuthString(http, "Local", certificate);
- DEBUG_printf(("cups_local_auth: Returning authstring = \"%s\"\n",
- http->authstring));
+ DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
+ http->authstring));
- return (0);
+ return (0);
+ }
+ }
+
+ return (1);
#endif /* WIN32 || __EMX__ */
}
projects / thirdparty / cups.git / blobdiff