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);
#else
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 */
# 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));
/*
* See if we are accessing localhost...
*/
if (!httpAddrLocalhost(http->hostaddr) &&
_cups_strcasecmp(http->hostname, "localhost") != 0)
{
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
_cups_strncasecmp(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,
* try the root certificate...
*/
pid = getpid();
snprintf(filename, sizeof(filename), "%s/certs/%d", cg->cups_statedir, pid);
if ((fp = fopen(filename, "r")) == NULL && pid > 0)
{
/*
* 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 (!_cups_strncasecmp(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)
{
/*
* Read the certificate from the file...
*/
char certificate[33], /* Certificate string */
*certptr; /* Pointer to certificate string */
certptr = fgets(certificate, sizeof(certificate), fp);
fclose(fp);
if (certptr)
{
/*
* Set the authorization string and return...
*/
httpSetAuthString(http, "Local", certificate);
DEBUG_printf(("8cups_local_auth: Returning authstring=\"%s\"",
http->authstring));
return (0);
}
}
return (1);
#endif /* WIN32 || __EMX__ */
}
int /* O - 0 on success, -1 on error */
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 */
*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 */
int localauth; /* Local authentication result */
_cups_globals_t *cg; /* Global data */
DEBUG_printf(("cupsDoAuthentication(http=%p, method=\"%s\", resource=\"%s\")",
http, method, resource));
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...
*/
httpSetAuthString(http, NULL, NULL);
/*
* See if we can do local authentication...
*/
if (http->digest_tries < 3)
{
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...
*/
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...
*/
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 = _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_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...
*/
#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,
(int)strlen(http->userpass));
httpSetAuthString(http, "Basic", encode);
}
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(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);
}
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 ", (size_t)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);
return (-1);
}
return (0);
}
ipp_t * /* O - Response data */
cupsDoIORequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
ipp_t *request, /* I - IPP request */
const char *resource, /* I - HTTP resource for POST */
int infile, /* I - File to read from or -1 for none */
int outfile) /* I - File to write to or -1 for none */
{
ipp_t *response = NULL; /* IPP response data */
size_t length = 0; /* Content-Length value */
http_status_t status; /* Status of HTTP request */
struct stat fileinfo; /* File information */
int bytes; /* Number of bytes read/written */
char buffer[32768]; /* Output buffer */
DEBUG_printf(("cupsDoIORequest(http=%p, request=%p(%s), resource=\"%s\", "
"infile=%d, outfile=%d)", http, request,
request ? ippOpString(request->request.op.operation_id) : "?",
resource, infile, outfile));
/*
* Range check input...
*/
if (!request || !resource)
{
ippDelete(request);
_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);
return (NULL);
}
/*
* Get the default connection as needed...
*/
if (!http)
if ((http = _cupsConnect()) == NULL)
{
ippDelete(request);
return (NULL);
}
/*
* See if we have a file to send...
*/
if (infile >= 0)
{
if (fstat(infile, &fileinfo))
{
/*
* Can't get file information!
*/
_cupsSetError(errno == EBADF ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED,
NULL, 0);
ippDelete(request);
return (NULL);
}
#ifdef WIN32
if (fileinfo.st_mode & _S_IFDIR)
#else
if (S_ISDIR(fileinfo.st_mode))
#endif /* WIN32 */
{
/*
* Can't send a directory...
*/
ippDelete(request);
_cupsSetError(IPP_STATUS_ERROR_NOT_POSSIBLE, strerror(EISDIR), 0);
return (NULL);
}
#ifndef WIN32
if (!S_ISREG(fileinfo.st_mode))
length = 0; /* Chunk when piping */
else
#endif /* !WIN32 */
length = ippLength(request) + fileinfo.st_size;
}
else
length = ippLength(request);
DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld",
(long)ippLength(request), (long)length));
/*
* Clear any "Local" authentication data since it is probably stale...
*/
if (http->authstring && !strncmp(http->authstring, "Local ", 6))
httpSetAuthString(http, NULL, NULL);
/*
* Loop until we can send the request without authorization problems.
*/
while (response == NULL)
{
DEBUG_puts("2cupsDoIORequest: setup...");
/*
* Send the request...
*/
status = cupsSendRequest(http, request, resource, length);
DEBUG_printf(("2cupsDoIORequest: status=%d", status));
if (status == HTTP_STATUS_CONTINUE && request->state == IPP_STATE_DATA && infile >= 0)
{
DEBUG_puts("2cupsDoIORequest: file write...");
/*
* Send the file with the request...
*/
#ifndef WIN32
if (S_ISREG(fileinfo.st_mode))
#endif /* WIN32 */
lseek(infile, 0, SEEK_SET);
while ((bytes = (int)read(infile, buffer, sizeof(buffer))) > 0)
{
if ((status = cupsWriteRequestData(http, buffer, bytes))
!= HTTP_STATUS_CONTINUE)
break;
}
}
/*
* Get the server's response...
*/
if (status != HTTP_STATUS_ERROR)
{
response = cupsGetResponse(http, resource);
status = httpGetStatus(http);
}
DEBUG_printf(("2cupsDoIORequest: status=%d", status));
if (status == HTTP_STATUS_ERROR ||
(status >= HTTP_STATUS_BAD_REQUEST && status != HTTP_STATUS_UNAUTHORIZED &&
status != HTTP_STATUS_UPGRADE_REQUIRED))
{
_cupsSetHTTPError(status);
break;
}
if (response && outfile >= 0)
{
/*
* Write trailing data to file...
*/
while ((bytes = (int)httpRead2(http, buffer, sizeof(buffer))) > 0)
if (write(outfile, buffer, bytes) < bytes)
break;
}
if (http->state != HTTP_STATE_WAITING)
{
/*
* Flush any remaining data...
*/
httpFlush(http);
}
}
/*
* Delete the original request and return the response...
*/
ippDelete(request);
return (response);
}
