/*
- * "$Id: auth.c 7720 2008-07-11 22:46:21Z mike $"
+ * Authentication functions for CUPS.
*
- * Authentication functions for CUPS.
+ * Copyright 2007-2017 by Apple Inc.
+ * Copyright 1997-2007 by Easy Software Products.
*
- * Copyright 2007-2011 by Apple Inc.
- * Copyright 1997-2007 by Easy Software Products.
+ * This file contains Kerberos support code, copyright 2006 by
+ * Jelmer Vernooij.
*
- * This file contains Kerberos support code, copyright 2006 by
- * Jelmer Vernooij.
- *
- * 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/".
- *
- * This file is subject to the Apple OS-Developed Software exception.
- *
- * 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...
+ * Licensed under Apache License v2.0. See the file "LICENSE" for more information.
*/
/*
* Local functions...
*/
+static const char *cups_auth_find(const char *www_authenticate, const char *scheme);
+static const char *cups_auth_param(const char *scheme, const char *name, char *value, size_t valsize);
+static const char *cups_auth_scheme(const char *www_authenticate, char *scheme, size_t schemesize);
+
#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 /* @private@ */
+{
+ 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/macOS 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 */
- char prompt[1024], /* Prompt for user */
+ const char *password, /* Password string */
+ *www_auth, /* WWW-Authenticate header */
+ *schemedata; /* Scheme-specific data */
+ char scheme[256], /* Scheme name */
+ prompt[1024], /* Prompt for user */
realm[HTTP_MAX_VALUE], /* realm="xyz" string */
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\")",
- http, method, resource));
+ DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")", (void *)http, method, resource));
if (!http)
http = _cupsConnect();
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...
+ * Nope, loop through the authentication schemes to find the first we support.
*/
- 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)))
+ www_auth = httpGetField(http, HTTP_FIELD_WWW_AUTHENTICATE);
+
+ for (schemedata = cups_auth_scheme(www_auth, scheme, sizeof(scheme)); schemedata; schemedata = cups_auth_scheme(schemedata + strlen(scheme), scheme, sizeof(scheme)))
{
/*
- * Nope - get a new password from the user...
+ * Check the scheme name...
*/
- cg = _cupsGlobals();
+#ifdef HAVE_GSSAPI
+ if (!_cups_strcasecmp(scheme, "Negotiate"))
+ {
+ /*
+ * Kerberos authentication...
+ */
- if (!cg->lang_default)
- cg->lang_default = cupsLangDefault();
+ if (_cupsSetNegotiateAuthString(http, method, resource))
+ {
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
+ return (-1);
+ }
- snprintf(prompt, sizeof(prompt),
- _cupsLangString(cg->lang_default, _("Password for %s on %s? ")),
- cupsUser(),
- http->hostname[0] == '/' ? "localhost" : http->hostname);
+ break;
+ }
+ else
+#endif /* HAVE_GSSAPI */
+ if (_cups_strcasecmp(scheme, "Basic") && _cups_strcasecmp(scheme, "Digest"))
+ continue; /* Not supported (yet) */
- http->digest_tries = strncasecmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE],
- "Digest", 5) != 0;
- http->userpass[0] = '\0';
+ /*
+ * See if we should retry the current username:password...
+ */
- if ((password = cupsGetPassword2(prompt, http, method, resource)) == NULL)
+ if ((http->digest_tries > 1 || !http->userpass[0]) && (!_cups_strcasecmp(scheme, "Basic") || (!_cups_strcasecmp(scheme, "Digest"))))
{
- http->status = HTTP_AUTHORIZATION_CANCELED;
- return (-1);
- }
+ /*
+ * Nope - get a new password from the user...
+ */
- snprintf(http->userpass, sizeof(http->userpass), "%s:%s", cupsUser(),
- password);
- }
- else if (http->status == HTTP_UNAUTHORIZED)
- http->digest_tries ++;
+ char default_username[HTTP_MAX_VALUE];
+ /* Default username */
- if (http->status == HTTP_UNAUTHORIZED && http->digest_tries >= 3)
- {
- DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)",
- http->digest_tries));
+ cg = _cupsGlobals();
- http->status = HTTP_AUTHORIZATION_CANCELED;
- return (-1);
- }
+ if (!cg->lang_default)
+ cg->lang_default = cupsLangDefault();
- /*
- * Got a password; encode it for the server...
- */
+ if (cups_auth_param(schemedata, "username", default_username, sizeof(default_username)))
+ cupsSetUser(default_username);
-#ifdef HAVE_GSSAPI
- if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Negotiate", 9))
- {
- /*
- * Kerberos authentication...
- */
+ snprintf(prompt, sizeof(prompt), _cupsLangString(cg->lang_default, _("Password for %s on %s? ")), cupsUser(), http->hostname[0] == '/' ? "localhost" : http->hostname);
+
+ http->digest_tries = _cups_strncasecmp(scheme, "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_STATUS_UNAUTHORIZED)
+ http->digest_tries ++;
- if (_cupsSetNegotiateAuthString(http))
+ if (http->status == HTTP_STATUS_UNAUTHORIZED && http->digest_tries >= 3)
{
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ DEBUG_printf(("1cupsDoAuthentication: Too many authentication tries (%d)", http->digest_tries));
+
+ http->status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
return (-1);
}
- }
- else
-#endif /* HAVE_GSSAPI */
- if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Basic", 5))
- {
+
/*
- * Basic authentication...
+ * Got a password; encode it for the server...
*/
- char encode[256]; /* Base64 buffer */
-
+ if (!_cups_strcasecmp(scheme, "Basic"))
+ {
+ /*
+ * Basic authentication...
+ */
- httpEncode64_2(encode, sizeof(encode), http->userpass,
- (int)strlen(http->userpass));
- httpSetAuthString(http, "Basic", encode);
- }
- else if (!strncmp(http->fields[HTTP_FIELD_WWW_AUTHENTICATE], "Digest", 6))
- {
- /*
- * Digest authentication...
- */
+ char encode[256]; /* Base64 buffer */
- char encode[33], /* MD5 buffer */
- digest[1024]; /* Digest auth data */
+ httpEncode64_2(encode, sizeof(encode), http->userpass, (int)strlen(http->userpass));
+ httpSetAuthString(http, "Basic", encode);
+ }
+ else if (!_cups_strcasecmp(scheme, "Digest"))
+ {
+ /*
+ * Digest authentication...
+ */
+ int i; /* Looping var */
+ char algorithm[65], /* Hashing algorithm */
+ opaque[HTTP_MAX_VALUE],
+ /* Opaque data from server */
+ cnonce[65], /* cnonce value */
+ kd[65], /* Final MD5/SHA-256 digest */
+ digest[1024]; /* Digest auth data */
+
+ if (strcmp(nonce, http->nonce))
+ {
+ strlcpy(http->nonce, nonce, sizeof(http->nonce));
+ http->nonce_count = 1;
+ }
+ else
+ http->nonce_count ++;
+
+ cups_auth_param(schemedata, "opaque", opaque, sizeof(opaque));
+ cups_auth_param(schemedata, "nonce", nonce, sizeof(nonce));
+ cups_auth_param(schemedata, "realm", realm, sizeof(realm));
+
+ for (i = 0; i < 64; i ++)
+ cnonce[i] = "0123456789ABCDEF"[CUPS_RAND() & 15];
+ cnonce[64] = '\0';
+
+ if (cups_auth_param(schemedata, "algorithm", algorithm, sizeof(algorithm)))
+ {
+ /*
+ * Calculate and pass the RFC 2617/7616 WWW-Authenticate header...
+ */
+
+ if (!_httpDigest(kd, sizeof(kd), algorithm, cupsUser(), realm, strchr(http->userpass, ':') + 1, nonce, http->nonce_count, cnonce, "auth", method, resource))
+ continue;
+
+ if (opaque[0])
+ snprintf(digest, sizeof(digest), "username=\"%s\", realm=\"%s\", nonce=\"%s\", algorithm=%s, qop=auth, opaque=\"%s\", cnonce=\"%s\", nc=%08x, uri=\"%s\", response=\"%s\"", cupsUser(), realm, nonce, algorithm, opaque, cnonce, http->nonce_count, resource, kd);
+ else
+ snprintf(digest, sizeof(digest), "username=\"%s\", realm=\"%s\", nonce=\"%s\", algorithm=%s, qop=auth, cnonce=\"%s\", nc=%08x, uri=\"%s\", response=\"%s\"", cupsUser(), realm, nonce, algorithm, cnonce, http->nonce_count, resource, kd);
+ }
+ else
+ {
+ /*
+ * Calculate and pass the old RFC 2069 WWW-Authenticate header...
+ */
+
+ if (!_httpDigest(kd, sizeof(kd), NULL, cupsUser(), realm, strchr(http->userpass, ':') + 1, nonce, http->nonce_count, NULL, NULL, method, resource))
+ continue;
+
+ snprintf(digest, sizeof(digest), "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"", cupsUser(), realm, nonce, resource, kd);
+ }
+
+ httpSetAuthString(http, "Digest", digest);
+ }
+ }
- httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "realm", realm);
- httpGetSubField(http, HTTP_FIELD_WWW_AUTHENTICATE, "nonce", nonce);
+ if (http->authstring)
+ {
+ DEBUG_printf(("1cupsDoAuthentication: authstring=\"%s\"", http->authstring));
- httpMD5(cupsUser(), realm, strchr(http->userpass, ':') + 1, encode);
- httpMD5Final(nonce, method, 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);
+ return (0);
}
else
{
- DEBUG_printf(("1cupsDoAuthentication: Unknown auth type: \"%s\"",
- http->fields[HTTP_FIELD_WWW_AUTHENTICATE]));
- http->status = HTTP_AUTHORIZATION_CANCELED;
+ 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);
}
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__
/*
* to use it...
*/
- if (gss_init_sec_context == NULL)
+ if (&gss_init_sec_context == NULL)
{
DEBUG_puts("1_cupsSetNegotiateAuthString: Weak-linked GSSAPI/Kerberos "
"framework is not present");
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, (gss_auth_identity_t)&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)
{
* arbitrarily large credentials...
*/
- int authsize = 10 + /* "Negotiate " */
- output_token.length * 4 / 3 + 1 + /* Base64 */
- 1; /* nul */
+ int authsize = 10 + /* "Negotiate " */
+ (int)output_token.length * 4 / 3 + 1 + 1;
+ /* Base64 + nul */
httpSetAuthString(http, NULL, NULL);
- if ((http->authstring = malloc(authsize)) == NULL)
+ if ((http->authstring = malloc((size_t)authsize)) == NULL)
{
http->authstring = http->_authstring;
authsize = sizeof(http->_authstring);
}
- strcpy(http->authstring, "Negotiate ");
+ strlcpy(http->authstring, "Negotiate ", (size_t)authsize);
httpEncode64_2(http->authstring + 10, authsize - 10, output_token.value,
- output_token.length);
+ (int)output_token.length);
gss_release_buffer(&minor_status, &output_token);
}
return (0);
}
+#endif /* HAVE_GSSAPI */
+
+
+/*
+ * 'cups_auth_find()' - Find the named WWW-Authenticate scheme.
+ *
+ * The "www_authenticate" parameter points to the current position in the header.
+ *
+ * Returns @code NULL@ if the auth scheme is not present.
+ */
+
+static const char * /* O - Start of matching scheme or @code NULL@ if not found */
+cups_auth_find(const char *www_authenticate, /* I - Pointer into WWW-Authenticate header */
+ const char *scheme) /* I - Authentication scheme */
+{
+ size_t schemelen = strlen(scheme); /* Length of scheme */
+
+
+ DEBUG_printf(("8cups_auth_find(www_authenticate=\"%s\", scheme=\"%s\"(%d))", www_authenticate, scheme, (int)schemelen));
+
+ while (*www_authenticate)
+ {
+ /*
+ * Skip leading whitespace and commas...
+ */
+
+ DEBUG_printf(("9cups_auth_find: Before whitespace: \"%s\"", www_authenticate));
+ while (isspace(*www_authenticate & 255) || *www_authenticate == ',')
+ www_authenticate ++;
+ DEBUG_printf(("9cups_auth_find: After whitespace: \"%s\"", www_authenticate));
+
+ /*
+ * See if this is "Scheme" followed by whitespace or the end of the string.
+ */
+
+ if (!strncmp(www_authenticate, scheme, schemelen) && (isspace(www_authenticate[schemelen] & 255) || www_authenticate[schemelen] == ',' || !www_authenticate[schemelen]))
+ {
+ /*
+ * Yes, this is the start of the scheme-specific information...
+ */
+
+ DEBUG_printf(("9cups_auth_find: Returning \"%s\".", www_authenticate));
+
+ return (www_authenticate);
+ }
+
+ /*
+ * Skip the scheme name or param="value" string...
+ */
+
+ while (!isspace(*www_authenticate & 255) && *www_authenticate)
+ {
+ if (*www_authenticate == '\"')
+ {
+ /*
+ * Skip quoted value...
+ */
+
+ www_authenticate ++;
+ while (*www_authenticate && *www_authenticate != '\"')
+ www_authenticate ++;
+
+ DEBUG_printf(("9cups_auth_find: After quoted: \"%s\"", www_authenticate));
+ }
+
+ www_authenticate ++;
+ }
+
+ DEBUG_printf(("9cups_auth_find: After skip: \"%s\"", www_authenticate));
+ }
+
+ DEBUG_puts("9cups_auth_find: Returning NULL.");
+
+ return (NULL);
+}
+
+
+/*
+ * 'cups_auth_param()' - Copy the value for the named authentication parameter,
+ * if present.
+ */
+
+static const char * /* O - Parameter value or @code NULL@ if not present */
+cups_auth_param(const char *scheme, /* I - Pointer to auth data */
+ const char *name, /* I - Name of parameter */
+ char *value, /* I - Value buffer */
+ size_t valsize) /* I - Size of value buffer */
+{
+ char *valptr = value, /* Pointer into value buffer */
+ *valend = value + valsize - 1; /* Pointer to end of buffer */
+ size_t namelen = strlen(name); /* Name length */
+ int param; /* Is this a parameter? */
+
+
+ DEBUG_printf(("8cups_auth_param(scheme=\"%s\", name=\"%s\", value=%p, valsize=%d)", scheme, name, (void *)value, (int)valsize));
+
+ while (!isspace(*scheme & 255) && *scheme)
+ scheme ++;
+
+ while (*scheme)
+ {
+ while (isspace(*scheme & 255) || *scheme == ',')
+ scheme ++;
+
+ if (!strncmp(scheme, name, namelen) && scheme[namelen] == '=')
+ {
+ /*
+ * Found the parameter, copy the value...
+ */
+
+ scheme += namelen + 1;
+ if (*scheme == '\"')
+ {
+ scheme ++;
+
+ while (*scheme && *scheme != '\"')
+ {
+ if (valptr < valend)
+ *valptr++ = *scheme;
+
+ scheme ++;
+ }
+ }
+ else
+ {
+ while (*scheme && strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~+/=", *scheme))
+ {
+ if (valptr < valend)
+ *valptr++ = *scheme;
+
+ scheme ++;
+ }
+ }
+
+ *valptr = '\0';
+
+ DEBUG_printf(("9cups_auth_param: Returning \"%s\".", value));
+
+ return (value);
+ }
+
+ /*
+ * Skip the param=value string...
+ */
+
+ param = 0;
+
+ while (!isspace(*scheme & 255) && *scheme)
+ {
+ if (*scheme == '=')
+ param = 1;
+ else if (*scheme == '\"')
+ {
+ /*
+ * Skip quoted value...
+ */
+
+ scheme ++;
+ while (*scheme && *scheme != '\"')
+ scheme ++;
+ }
+
+ scheme ++;
+ }
+
+ /*
+ * If this wasn't a parameter, we are at the end of this scheme's
+ * parameters...
+ */
+
+ if (!param)
+ break;
+ }
+
+ *value = '\0';
+
+ DEBUG_puts("9cups_auth_param: Returning NULL.");
+
+ return (NULL);
+}
+
+
+/*
+ * 'cups_auth_scheme()' - Get the (next) WWW-Authenticate scheme.
+ *
+ * The "www_authenticate" parameter points to the current position in the header.
+ *
+ * Returns @code NULL@ if there are no (more) auth schemes present.
+ */
+
+static const char * /* O - Start of scheme or @code NULL@ if not found */
+cups_auth_scheme(const char *www_authenticate, /* I - Pointer into WWW-Authenticate header */
+ char *scheme, /* I - Scheme name buffer */
+ size_t schemesize) /* I - Size of buffer */
+{
+ const char *start; /* Start of scheme data */
+ char *sptr = scheme, /* Pointer into scheme buffer */
+ *send = scheme + schemesize - 1;/* End of scheme buffer */
+ int param; /* Is this a parameter? */
+
+
+ DEBUG_printf(("8cups_auth_scheme(www_authenticate=\"%s\", scheme=%p, schemesize=%d)", www_authenticate, (void *)scheme, (int)schemesize));
+
+ while (*www_authenticate)
+ {
+ /*
+ * Skip leading whitespace and commas...
+ */
+
+ while (isspace(*www_authenticate & 255) || *www_authenticate == ',')
+ www_authenticate ++;
+
+ /*
+ * Parse the scheme name or param="value" string...
+ */
+
+ for (sptr = scheme, start = www_authenticate, param = 0; *www_authenticate && *www_authenticate != ',' && !isspace(*www_authenticate & 255); www_authenticate ++)
+ {
+ if (*www_authenticate == '=')
+ param = 1;
+ else if (!param && sptr < send)
+ *sptr++ = *www_authenticate;
+ else if (*www_authenticate == '\"')
+ {
+ /*
+ * Skip quoted value...
+ */
+
+ www_authenticate ++;
+ while (*www_authenticate && *www_authenticate != '\"')
+ www_authenticate ++;
+ }
+ }
+
+ if (sptr > scheme && !param)
+ {
+ *sptr = '\0';
+
+ DEBUG_printf(("9cups_auth_scheme: Returning \"%s\".", start));
+
+ return (start);
+ }
+ }
+
+ *scheme = '\0';
+
+ DEBUG_puts("9cups_auth_scheme: Returning NULL.");
+
+ return (NULL);
+}
+
+
+#ifdef HAVE_GSSAPI
+# 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_get_gssname()' - Get CUPS service credentials for authentication.
+ * '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 */
+ const char *www_auth, /* WWW-Authenticate header */
+ *schemedata; /* Data for the named auth scheme */
_cups_globals_t *cg = _cupsGlobals(); /* Global data */
# if defined(HAVE_AUTHORIZATION_H)
OSStatus status; /* Status */
# endif /* HAVE_AUTHORIZATION_H */
- DEBUG_printf(("7cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"",
- http, httpAddrString(http->hostaddr, filename, sizeof(filename)), http->hostname));
+ DEBUG_printf(("7cups_local_auth(http=%p) hostaddr=%s, hostname=\"%s\"", (void *)http, httpAddrString(http->hostaddr, filename, sizeof(filename)), http->hostname));
/*
* See if we are accessing localhost...
*/
- if (!httpAddrLocalhost(http->hostaddr) &&
- strcasecmp(http->hostname, "localhost") != 0)
+ if (!httpAddrLocalhost(http->hostaddr) && _cups_strcasecmp(http->hostname, "localhost") != 0)
{
DEBUG_puts("8cups_local_auth: Not a local connection!");
return (1);
}
+ www_auth = httpGetField(http, HTTP_FIELD_WWW_AUTHENTICATE);
+
# if defined(HAVE_AUTHORIZATION_H)
/*
* Delete any previous authorization reference...
http->auth_ref = NULL;
}
- if (!getenv("GATEWAY_INTERFACE") &&
- httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "authkey",
- auth_key, sizeof(auth_key)))
+ if (!getenv("GATEWAY_INTERFACE") && (schemedata = cups_auth_find(www_auth, "AuthRef")) != NULL && cups_auth_param(schemedata, "key", auth_key, sizeof(auth_key)))
{
- status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment,
- kAuthorizationFlagDefaults, &http->auth_ref);
+ status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &http->auth_ref);
if (status != errAuthorizationSuccess)
{
DEBUG_printf(("8cups_local_auth: AuthorizationCreate() returned %d (%s)",
}
# endif /* HAVE_AUTHORIZATION_H */
+# ifdef HAVE_GSSAPI
+ if (cups_auth_find(www_auth, "Negotiate"))
+ return (1);
+# endif /* HAVE_GSSAPI */
+
# if defined(SO_PEERCRED) && defined(AF_LOCAL)
/*
* See if we can authenticate using the peer credentials provided over a
* 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... */
+ if (http->hostaddr->addr.sa_family == AF_LOCAL &&
+ !getenv("GATEWAY_INTERFACE") && /* Not via CGI programs... */
+ cups_auth_find(www_auth, "PeerCred"))
{
/*
* Verify that the current cupsUser() matches the current UID...
}
# endif /* SO_PEERCRED && AF_LOCAL */
+ if ((schemedata = cups_auth_find(www_auth, "Local")) == NULL)
+ return (1);
+
/*
* Try opening a certificate file for this PID. If that fails,
* try the root certificate...
* 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 */
+ DEBUG_printf(("9cups_local_auth: Unable to open file \"%s\": %s", filename, strerror(errno)));
- if (!httpGetSubField2(http, HTTP_FIELD_WWW_AUTHENTICATE, "trc", trc,
- sizeof(trc)))
+ if (!cups_auth_param(schemedata, "trc", trc, sizeof(trc)))
{
/*
* Scheduler doesn't want us to use the root certificate...
}
snprintf(filename, sizeof(filename), "%s/certs/0", cg->cups_statedir);
- fp = fopen(filename, "r");
+ if ((fp = fopen(filename, "r")) == NULL)
+ DEBUG_printf(("9cups_local_auth: Unable to open file \"%s\": %s", filename, strerror(errno)));
}
if (fp)
* 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);
#endif /* WIN32 || __EMX__ */
}
-
-
-/*
- * End of "$Id: auth.c 7720 2008-07-11 22:46:21Z mike $".
- */
projects / thirdparty / cups.git / blobdiff