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cups/scheduler/auth.c

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/*
* Authorization routines for the CUPS scheduler.
*
* Copyright © 2007-2019 by Apple Inc.
* Copyright © 1997-2007 by Easy Software Products, all rights reserved.
*
* This file contains Kerberos support code, copyright 2006 by
* Jelmer Vernooij.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more
* information.
*/
/*
* Include necessary headers...
*/
#include "cupsd.h"
#include <grp.h>
#ifdef HAVE_SHADOW_H
# include <shadow.h>
#endif /* HAVE_SHADOW_H */
#ifdef HAVE_CRYPT_H
# include <crypt.h>
#endif /* HAVE_CRYPT_H */
#if HAVE_LIBPAM
# ifdef HAVE_PAM_PAM_APPL_H
# include <pam/pam_appl.h>
# else
# include <security/pam_appl.h>
# endif /* HAVE_PAM_PAM_APPL_H */
#endif /* HAVE_LIBPAM */
#ifdef HAVE_MEMBERSHIP_H
# include <membership.h>
#endif /* HAVE_MEMBERSHIP_H */
#ifdef HAVE_AUTHORIZATION_H
# include <Security/AuthorizationTags.h>
#endif /* HAVE_AUTHORIZATION_H */
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif /* HAVE_SYS_PARAM_H */
#ifdef HAVE_SYS_UCRED_H
# include <sys/ucred.h>
typedef struct xucred cupsd_ucred_t;
# define CUPSD_UCRED_UID(c) (c).cr_uid
#else
# ifndef __OpenBSD__
typedef struct ucred cupsd_ucred_t;
# else
typedef struct sockpeercred cupsd_ucred_t;
# endif
# define CUPSD_UCRED_UID(c) (c).uid
#endif /* HAVE_SYS_UCRED_H */
/*
* Local functions...
*/
#ifdef HAVE_AUTHORIZATION_H
static int check_authref(cupsd_client_t *con, const char *right);
#endif /* HAVE_AUTHORIZATION_H */
static int compare_locations(cupsd_location_t *a,
cupsd_location_t *b);
static cupsd_authmask_t *copy_authmask(cupsd_authmask_t *am, void *data);
static void free_authmask(cupsd_authmask_t *am, void *data);
#if HAVE_LIBPAM
static int pam_func(int, const struct pam_message **,
struct pam_response **, void *);
#endif /* HAVE_LIBPAM */
/*
* Local structures...
*/
#if HAVE_LIBPAM
typedef struct cupsd_authdata_s /**** Authentication data ****/
{
char username[HTTP_MAX_VALUE], /* Username string */
password[HTTP_MAX_VALUE]; /* Password string */
} cupsd_authdata_t;
#endif /* HAVE_LIBPAM */
/*
* 'cupsdAddIPMask()' - Add an IP address authorization mask.
*/
int /* O - 1 on success, 0 on failure */
cupsdAddIPMask(
cups_array_t **masks, /* IO - Masks array (created as needed) */
const unsigned address[4], /* I - IP address */
const unsigned netmask[4]) /* I - IP netmask */
{
cupsd_authmask_t temp; /* New host/domain mask */
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddIPMask(masks=%p(%p), address=%x:%x:%x:%x, netmask=%x:%x:%x:%x)", masks, *masks, address[0], address[1], address[2], address[3], netmask[0], netmask[1], netmask[2], netmask[3]);
temp.type = CUPSD_AUTH_IP;
memcpy(temp.mask.ip.address, address, sizeof(temp.mask.ip.address));
memcpy(temp.mask.ip.netmask, netmask, sizeof(temp.mask.ip.netmask));
/*
* Create the masks array as needed and add...
*/
if (!*masks)
*masks = cupsArrayNew3(NULL, NULL, NULL, 0,
(cups_acopy_func_t)copy_authmask,
(cups_afree_func_t)free_authmask);
return (cupsArrayAdd(*masks, &temp));
}
/*
* 'cupsdAddLocation()' - Add a location for authorization.
*/
void
cupsdAddLocation(cupsd_location_t *loc) /* I - Location to add */
{
/*
* Make sure the locations array is created...
*/
if (!Locations)
Locations = cupsArrayNew3((cups_array_func_t)compare_locations, NULL,
(cups_ahash_func_t)NULL, 0,
(cups_acopy_func_t)NULL,
(cups_afree_func_t)cupsdFreeLocation);
if (Locations)
{
cupsArrayAdd(Locations, loc);
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddLocation: Added location \"%s\"", loc->location ? loc->location : "(null)");
}
}
/*
* 'cupsdAddName()' - Add a name to a location...
*/
void
cupsdAddName(cupsd_location_t *loc, /* I - Location to add to */
char *name) /* I - Name to add */
{
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddName(loc=%p, name=\"%s\")", loc, name);
if (!loc->names)
loc->names = cupsArrayNew3(NULL, NULL, NULL, 0,
(cups_acopy_func_t)_cupsStrAlloc,
(cups_afree_func_t)_cupsStrFree);
if (!cupsArrayAdd(loc->names, name))
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to duplicate name for location %s: %s",
loc->location ? loc->location : "nil", strerror(errno));
return;
}
}
/*
* 'cupsdAddNameMask()' - Add a host or interface name authorization mask.
*/
int /* O - 1 on success, 0 on failure */
cupsdAddNameMask(cups_array_t **masks, /* IO - Masks array (created as needed) */
char *name) /* I - Host or interface name */
{
cupsd_authmask_t temp; /* New host/domain mask */
char ifname[32], /* Interface name */
*ifptr; /* Pointer to end of name */
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddNameMask(masks=%p(%p), name=\"%s\")", masks, *masks, name);
if (!_cups_strcasecmp(name, "@LOCAL"))
{
/*
* Deny *interface*...
*/
temp.type = CUPSD_AUTH_INTERFACE;
temp.mask.name.name = (char *)"*";
}
else if (!_cups_strncasecmp(name, "@IF(", 4))
{
/*
* Deny *interface*...
*/
strlcpy(ifname, name + 4, sizeof(ifname));
ifptr = ifname + strlen(ifname) - 1;
if (ifptr >= ifname && *ifptr == ')')
{
ifptr --;
*ifptr = '\0';
}
temp.type = CUPSD_AUTH_INTERFACE;
temp.mask.name.name = ifname;
}
else
{
/*
* Deny name...
*/
if (*name == '*')
name ++;
temp.type = CUPSD_AUTH_NAME;
temp.mask.name.name = (char *)name;
}
/*
* Set the name length...
*/
temp.mask.name.length = strlen(temp.mask.name.name);
/*
* Create the masks array as needed and add...
*/
if (!*masks)
*masks = cupsArrayNew3(NULL, NULL, NULL, 0,
(cups_acopy_func_t)copy_authmask,
(cups_afree_func_t)free_authmask);
return (cupsArrayAdd(*masks, &temp));
}
/*
* 'cupsdAuthorize()' - Validate any authorization credentials.
*/
void
cupsdAuthorize(cupsd_client_t *con) /* I - Client connection */
{
int type; /* Authentication type */
const char *authorization; /* Pointer into Authorization string */
char *ptr, /* Pointer into string */
username[HTTP_MAX_VALUE],
/* Username string */
password[HTTP_MAX_VALUE];
/* Password string */
cupsd_cert_t *localuser; /* Certificate username */
/*
* Locate the best matching location so we know what kind of
* authentication to expect...
*/
con->best = cupsdFindBest(con->uri, httpGetState(con->http));
con->type = CUPSD_AUTH_NONE;
cupsdLogClient(con, CUPSD_LOG_DEBUG2, "con->uri=\"%s\", con->best=%p(%s)", con->uri, con->best, con->best ? con->best->location : "");
if (con->best && con->best->type != CUPSD_AUTH_NONE)
{
if (con->best->type == CUPSD_AUTH_DEFAULT)
type = cupsdDefaultAuthType();
else
type = con->best->type;
}
else
type = cupsdDefaultAuthType();
/*
* Decode the Authorization string...
*/
authorization = httpGetField(con->http, HTTP_FIELD_AUTHORIZATION);
username[0] = '\0';
password[0] = '\0';
#ifdef HAVE_GSSAPI
con->gss_uid = 0;
#endif /* HAVE_GSSAPI */
#ifdef HAVE_AUTHORIZATION_H
if (con->authref)
{
AuthorizationFree(con->authref, kAuthorizationFlagDefaults);
con->authref = NULL;
}
#endif /* HAVE_AUTHORIZATION_H */
if (!*authorization)
{
/*
* No authorization data provided, return early...
*/
cupsdLogClient(con, CUPSD_LOG_DEBUG, "No authentication data provided.");
return;
}
#ifdef HAVE_AUTHORIZATION_H
else if (!strncmp(authorization, "AuthRef ", 8) &&
httpAddrLocalhost(httpGetAddress(con->http)))
{
OSStatus status; /* Status */
char authdata[HTTP_MAX_VALUE];
/* Nonce value from client */
int authlen; /* Auth string length */
AuthorizationItemSet *authinfo; /* Authorization item set */
/*
* Get the Authorization Services data...
*/
authorization += 8;
while (isspace(*authorization & 255))
authorization ++;
authlen = sizeof(authdata);
httpDecode64_2(authdata, &authlen, authorization);
if (authlen != kAuthorizationExternalFormLength)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "External Authorization reference size is incorrect.");
return;
}
if ((status = AuthorizationCreateFromExternalForm((AuthorizationExternalForm *)authdata, &con->authref)) != 0)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "AuthorizationCreateFromExternalForm returned %d", (int)status);
return;
}
username[0] = '\0';
if (!AuthorizationCopyInfo(con->authref, kAuthorizationEnvironmentUsername,
&authinfo))
{
if (authinfo->count == 1 && authinfo->items[0].value &&
authinfo->items[0].valueLength >= 2)
{
strlcpy(username, authinfo->items[0].value, sizeof(username));
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Authorized as \"%s\" using AuthRef.", username);
}
AuthorizationFreeItemSet(authinfo);
}
if (!username[0])
{
/*
* No username in AuthRef, grab username using peer credentials...
*/
struct passwd *pwd; /* Password entry for this user */
cupsd_ucred_t peercred; /* Peer credentials */
socklen_t peersize; /* Size of peer credentials */
peersize = sizeof(peercred);
if (getsockopt(httpGetFd(con->http), 0, LOCAL_PEERCRED, &peercred, &peersize))
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to get peer credentials - %s", strerror(errno));
return;
}
if ((pwd = getpwuid(CUPSD_UCRED_UID(peercred))) == NULL)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to find UID %d for peer credentials.", (int)CUPSD_UCRED_UID(peercred));
return;
}
strlcpy(username, pwd->pw_name, sizeof(username));
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Authorized as \"%s\" using AuthRef + PeerCred.", username);
}
con->type = CUPSD_AUTH_BASIC;
}
#endif /* HAVE_AUTHORIZATION_H */
#if defined(SO_PEERCRED) && defined(AF_LOCAL)
else if (!strncmp(authorization, "PeerCred ", 9) &&
con->http->hostaddr->addr.sa_family == AF_LOCAL && con->best)
{
/*
* Use peer credentials from domain socket connection...
*/
struct passwd *pwd; /* Password entry for this user */
cupsd_ucred_t peercred; /* Peer credentials */
socklen_t peersize; /* Size of peer credentials */
#ifdef HAVE_AUTHORIZATION_H
const char *name; /* Authorizing name */
int no_peer = 0; /* Don't allow peer credentials? */
/*
* See if we should allow peer credentials...
*/
for (name = (char *)cupsArrayFirst(con->best->names);
name;
name = (char *)cupsArrayNext(con->best->names))
{
if (!_cups_strncasecmp(name, "@AUTHKEY(", 9) ||
!_cups_strcasecmp(name, "@SYSTEM"))
{
/* Normally don't want peer credentials if we need an auth key... */
no_peer = 1;
}
else if (!_cups_strcasecmp(name, "@OWNER"))
{
/* but if @OWNER is present then we allow it... */
no_peer = 0;
break;
}
}
if (no_peer)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "PeerCred authentication not allowed for resource per AUTHKEY policy.");
return;
}
#endif /* HAVE_AUTHORIZATION_H */
if ((pwd = getpwnam(authorization + 9)) == NULL)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "User \"%s\" does not exist.", authorization + 9);
return;
}
peersize = sizeof(peercred);
# ifdef __APPLE__
if (getsockopt(httpGetFd(con->http), 0, LOCAL_PEERCRED, &peercred, &peersize))
# else
if (getsockopt(httpGetFd(con->http), SOL_SOCKET, SO_PEERCRED, &peercred, &peersize))
# endif /* __APPLE__ */
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to get peer credentials - %s", strerror(errno));
return;
}
if (pwd->pw_uid != CUPSD_UCRED_UID(peercred))
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Invalid peer credentials for \"%s\" - got %d, expected %d.", authorization + 9, CUPSD_UCRED_UID(peercred), pwd->pw_uid);
# ifdef HAVE_SYS_UCRED_H
cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cr_version=%d", peercred.cr_version);
cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cr_uid=%d", peercred.cr_uid);
cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cr_ngroups=%d", peercred.cr_ngroups);
cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cr_groups[0]=%d", peercred.cr_groups[0]);
# endif /* HAVE_SYS_UCRED_H */
return;
}
strlcpy(username, authorization + 9, sizeof(username));
# ifdef HAVE_GSSAPI
con->gss_uid = CUPSD_UCRED_UID(peercred);
# endif /* HAVE_GSSAPI */
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Authorized as %s using PeerCred.", username);
con->type = CUPSD_AUTH_BASIC;
}
#endif /* SO_PEERCRED && AF_LOCAL */
else if (!strncmp(authorization, "Local", 5) &&
httpAddrLocalhost(httpGetAddress(con->http)))
{
/*
* Get Local certificate authentication data...
*/
authorization += 5;
while (isspace(*authorization & 255))
authorization ++;
if ((localuser = cupsdFindCert(authorization)) == NULL)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Local authentication certificate not found.");
return;
}
strlcpy(username, localuser->username, sizeof(username));
con->type = localuser->type;
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Authorized as %s using Local.", username);
}
else if (!strncmp(authorization, "Basic", 5))
{
/*
* Get the Basic authentication data...
*/
int userlen; /* Username:password length */
authorization += 5;
while (isspace(*authorization & 255))
authorization ++;
userlen = sizeof(username);
httpDecode64_2(username, &userlen, authorization);
/*
* Pull the username and password out...
*/
if ((ptr = strchr(username, ':')) == NULL)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Missing Basic password.");
return;
}
*ptr++ = '\0';
if (!username[0])
{
/*
* Username must not be empty...
*/
cupsdLogClient(con, CUPSD_LOG_ERROR, "Empty Basic username.");
return;
}
if (!*ptr)
{
/*
* Password must not be empty...
*/
cupsdLogClient(con, CUPSD_LOG_ERROR, "Empty Basic password.");
return;
}
strlcpy(password, ptr, sizeof(password));
/*
* Validate the username and password...
*/
switch (type)
{
default :
case CUPSD_AUTH_BASIC :
{
#if HAVE_LIBPAM
/*
* Only use PAM to do authentication. This supports MD5
* passwords, among other things...
*/
pam_handle_t *pamh; /* PAM authentication handle */
int pamerr; /* PAM error code */
struct pam_conv pamdata;/* PAM conversation data */
cupsd_authdata_t data; /* Authentication data */
strlcpy(data.username, username, sizeof(data.username));
strlcpy(data.password, password, sizeof(data.password));
# ifdef __sun
pamdata.conv = (int (*)(int, struct pam_message **,
struct pam_response **,
void *))pam_func;
# else
pamdata.conv = pam_func;
# endif /* __sun */
pamdata.appdata_ptr = &data;
pamerr = pam_start("cups", username, &pamdata, &pamh);
if (pamerr != PAM_SUCCESS)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "pam_start() returned %d (%s)", pamerr, pam_strerror(pamh, pamerr));
return;
}
# ifdef HAVE_PAM_SET_ITEM
# ifdef PAM_RHOST
pamerr = pam_set_item(pamh, PAM_RHOST, con->http->hostname);
if (pamerr != PAM_SUCCESS)
cupsdLogClient(con, CUPSD_LOG_WARN, "pam_set_item(PAM_RHOST) returned %d (%s)", pamerr, pam_strerror(pamh, pamerr));
# endif /* PAM_RHOST */
# ifdef PAM_TTY
pamerr = pam_set_item(pamh, PAM_TTY, "cups");
if (pamerr != PAM_SUCCESS)
cupsdLogClient(con, CUPSD_LOG_WARN, "pam_set_item(PAM_TTY) returned %d (%s)", pamerr, pam_strerror(pamh, pamerr));
# endif /* PAM_TTY */
# endif /* HAVE_PAM_SET_ITEM */
pamerr = pam_authenticate(pamh, PAM_SILENT);
if (pamerr != PAM_SUCCESS)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "pam_authenticate() returned %d (%s)", pamerr, pam_strerror(pamh, pamerr));
pam_end(pamh, 0);
return;
}
# ifdef HAVE_PAM_SETCRED
pamerr = pam_setcred(pamh, PAM_ESTABLISH_CRED | PAM_SILENT);
if (pamerr != PAM_SUCCESS)
cupsdLogClient(con, CUPSD_LOG_WARN, "pam_setcred() returned %d (%s)", pamerr, pam_strerror(pamh, pamerr));
# endif /* HAVE_PAM_SETCRED */
pamerr = pam_acct_mgmt(pamh, PAM_SILENT);
if (pamerr != PAM_SUCCESS)
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "pam_acct_mgmt() returned %d (%s)", pamerr, pam_strerror(pamh, pamerr));
pam_end(pamh, 0);
return;
}
pam_end(pamh, PAM_SUCCESS);
#else
/*
* Use normal UNIX password file-based authentication...
*/
char *pass; /* Encrypted password */
struct passwd *pw; /* User password data */
# ifdef HAVE_SHADOW_H
struct spwd *spw; /* Shadow password data */
# endif /* HAVE_SHADOW_H */
pw = getpwnam(username); /* Get the current password */
endpwent(); /* Close the password file */
if (!pw)
{
/*
* No such user...
*/
cupsdLogClient(con, CUPSD_LOG_ERROR, "Unknown username \"%s\".", username);
return;
}
# ifdef HAVE_SHADOW_H
spw = getspnam(username);
endspent();
if (!spw && !strcmp(pw->pw_passwd, "x"))
{
/*
* Don't allow blank passwords!
*/
cupsdLogClient(con, CUPSD_LOG_ERROR, "Username \"%s\" has no shadow password.", username);
return;
}
if (spw && !spw->sp_pwdp[0] && !pw->pw_passwd[0])
# else
if (!pw->pw_passwd[0])
# endif /* HAVE_SHADOW_H */
{
/*
* Don't allow blank passwords!
*/
cupsdLogClient(con, CUPSD_LOG_ERROR, "Username \"%s\" has no password.", username);
return;
}
/*
* OK, the password isn't blank, so compare with what came from the
* client...
*/
pass = crypt(password, pw->pw_passwd);
if (!pass || strcmp(pw->pw_passwd, pass))
{
# ifdef HAVE_SHADOW_H
if (spw)
{
pass = crypt(password, spw->sp_pwdp);
if (pass == NULL || strcmp(spw->sp_pwdp, pass))
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Authentication failed for user \"%s\".", username);
return;
}
}
else
# endif /* HAVE_SHADOW_H */
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Authentication failed for user \"%s\".", username);
return;
}
}
#endif /* HAVE_LIBPAM */
}
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Authorized as \"%s\" using Basic.", username);
break;
}
con->type = type;
}
#ifdef HAVE_GSSAPI
else if (!strncmp(authorization, "Negotiate", 9))
{
int len; /* Length of authorization string */
gss_ctx_id_t context; /* Authorization context */
OM_uint32 major_status, /* Major status code */
minor_status; /* Minor status code */
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER,
/* Input token from string */
output_token = GSS_C_EMPTY_BUFFER;
/* Output token for username */
gss_name_t client_name; /* Client name */
# ifdef __APPLE__
/*
* If the weak-linked GSSAPI/Kerberos library is not present, don't try
* to use it...
*/
if (&gss_init_sec_context == NULL)
{
cupsdLogClient(con, CUPSD_LOG_WARN, "GSSAPI/Kerberos authentication failed because the Kerberos framework is not present.");
return;
}
# endif /* __APPLE__ */
/*
* Find the start of the Kerberos input token...
*/
authorization += 9;
while (isspace(*authorization & 255))
authorization ++;
if (!*authorization)
{
cupsdLogClient(con, CUPSD_LOG_DEBUG2, "No authentication data specified.");
return;
}
/*
* Decode the authorization string to get the input token...
*/
len = (int)strlen(authorization) + 0;
input_token.value = malloc((size_t)len);
input_token.value = httpDecode64_2(input_token.value, &len,
authorization);
input_token.length = (size_t)len;
/*
* Accept the input token to get the authorization info...
*/
context = GSS_C_NO_CONTEXT;
client_name = GSS_C_NO_NAME;
major_status = gss_accept_sec_context(&minor_status,
&context,
ServerCreds,
&input_token,
GSS_C_NO_CHANNEL_BINDINGS,
&client_name,
NULL,
&output_token,
NULL,
NULL,
NULL);
if (output_token.length > 0)
gss_release_buffer(&minor_status, &output_token);
if (GSS_ERROR(major_status))
{
cupsdLogGSSMessage(CUPSD_LOG_DEBUG, major_status, minor_status, "[Client %d] Error accepting GSSAPI security context.", con->number);
if (context != GSS_C_NO_CONTEXT)
gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
return;
}
con->have_gss = 1;
/*
* Get the username associated with the client's credentials...
*/
if (major_status == GSS_S_CONTINUE_NEEDED)
cupsdLogGSSMessage(CUPSD_LOG_DEBUG, major_status, minor_status, "[Client %d] Credentials not complete.", con->number);
else if (major_status == GSS_S_COMPLETE)
{
major_status = gss_display_name(&minor_status, client_name,
&output_token, NULL);
if (GSS_ERROR(major_status))
{
cupsdLogGSSMessage(CUPSD_LOG_DEBUG, major_status, minor_status, "[Client %d] Error getting username.", con->number);
gss_release_name(&minor_status, &client_name);
gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
return;
}
strlcpy(username, output_token.value, sizeof(username));
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Authorized as \"%s\" using Negotiate.", username);
gss_release_name(&minor_status, &client_name);
gss_release_buffer(&minor_status, &output_token);
con->type = CUPSD_AUTH_NEGOTIATE;
}
gss_delete_sec_context(&minor_status, &context, GSS_C_NO_BUFFER);
# if defined(SO_PEERCRED) && defined(AF_LOCAL)
/*
* Get the client's UID if we are printing locally - that allows a backend
* to run as the correct user to get Kerberos credentials of its own.
*/
if (httpAddrFamily(con->http->hostaddr) == AF_LOCAL)
{
cupsd_ucred_t peercred; /* Peer credentials */
socklen_t peersize; /* Size of peer credentials */
peersize = sizeof(peercred);
# ifdef __APPLE__
if (getsockopt(httpGetFd(con->http), 0, LOCAL_PEERCRED, &peercred, &peersize))
# else
if (getsockopt(httpGetFd(con->http), SOL_SOCKET, SO_PEERCRED, &peercred,
&peersize))
# endif /* __APPLE__ */
{
cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to get peer credentials - %s", strerror(errno));
}
else
{
cupsdLogClient(con, CUPSD_LOG_DEBUG, "Using credentials for UID %d.", CUPSD_UCRED_UID(peercred));
con->gss_uid = CUPSD_UCRED_UID(peercred);
}
}
# endif /* SO_PEERCRED && AF_LOCAL */
}
#endif /* HAVE_GSSAPI */
else
{
char scheme[256]; /* Auth scheme... */
if (sscanf(authorization, "%255s", scheme) != 1)
strlcpy(scheme, "UNKNOWN", sizeof(scheme));
cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad authentication data \"%s ...\".", scheme);
return;
}
/*
* If we get here, then we were able to validate the username and
* password - copy the validated username and password to the client
* data and return...
*/
strlcpy(con->username, username, sizeof(con->username));
strlcpy(con->password, password, sizeof(con->password));
}
/*
* 'cupsdCheckAccess()' - Check whether the given address is allowed to
* access a location.
*/
int /* O - 1 if allowed, 0 otherwise */
cupsdCheckAccess(
unsigned ip[4], /* I - Client address */
const char *name, /* I - Client hostname */
size_t namelen, /* I - Length of hostname */
cupsd_location_t *loc) /* I - Location to check */
{
int allow; /* 1 if allowed, 0 otherwise */
if (!_cups_strcasecmp(name, "localhost"))
{
/*
* Access from localhost (127.0.0.1 or ::1) is always allowed...
*/
return (1);
}
else
{
/*
* Do authorization checks on the domain/address...
*/
switch (loc->order_type)
{
default :
allow = 0; /* anti-compiler-warning-code */
break;
case CUPSD_AUTH_ALLOW : /* Order Deny,Allow */
allow = 1;
if (cupsdCheckAuth(ip, name, namelen, loc->deny))
allow = 0;
if (cupsdCheckAuth(ip, name, namelen, loc->allow))
allow = 1;
break;
case CUPSD_AUTH_DENY : /* Order Allow,Deny */
allow = 0;
if (cupsdCheckAuth(ip, name, namelen, loc->allow))
allow = 1;
if (cupsdCheckAuth(ip, name, namelen, loc->deny))
allow = 0;
break;
}
}
return (allow);
}
/*
* 'cupsdCheckAuth()' - Check authorization masks.
*/
int /* O - 1 if mask matches, 0 otherwise */
cupsdCheckAuth(unsigned ip[4], /* I - Client address */
const char *name, /* I - Client hostname */
size_t name_len, /* I - Length of hostname */
cups_array_t *masks) /* I - Masks */
{
int i; /* Looping var */
cupsd_authmask_t *mask; /* Current mask */
cupsd_netif_t *iface; /* Network interface */
unsigned netip4; /* IPv4 network address */
#ifdef AF_INET6
unsigned netip6[4]; /* IPv6 network address */
#endif /* AF_INET6 */
for (mask = (cupsd_authmask_t *)cupsArrayFirst(masks);
mask;
mask = (cupsd_authmask_t *)cupsArrayNext(masks))
{
switch (mask->type)
{
case CUPSD_AUTH_INTERFACE :
/*
* Check for a match with a network interface...
*/
netip4 = htonl(ip[3]);
#ifdef AF_INET6
netip6[0] = htonl(ip[0]);
netip6[1] = htonl(ip[1]);
netip6[2] = htonl(ip[2]);
netip6[3] = htonl(ip[3]);
#endif /* AF_INET6 */
cupsdNetIFUpdate();
if (!strcmp(mask->mask.name.name, "*"))
{
#ifdef __APPLE__
/*
* Allow Back-to-My-Mac addresses...
*/
if ((ip[0] & 0xff000000) == 0xfd000000)
return (1);
#endif /* __APPLE__ */
/*
* Check against all local interfaces...
*/
for (iface = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
iface;
iface = (cupsd_netif_t *)cupsArrayNext(NetIFList))
{
/*
* Only check local interfaces...
*/
if (!iface->is_local)
continue;
if (iface->address.addr.sa_family == AF_INET)
{
/*
* Check IPv4 address...
*/
if ((netip4 & iface->mask.ipv4.sin_addr.s_addr) ==
(iface->address.ipv4.sin_addr.s_addr &
iface->mask.ipv4.sin_addr.s_addr))
return (1);
}
#ifdef AF_INET6
else
{
/*
* Check IPv6 address...
*/
for (i = 0; i < 4; i ++)
if ((netip6[i] & iface->mask.ipv6.sin6_addr.s6_addr32[i]) !=
(iface->address.ipv6.sin6_addr.s6_addr32[i] &
iface->mask.ipv6.sin6_addr.s6_addr32[i]))
break;
if (i == 4)
return (1);
}
#endif /* AF_INET6 */
}
}
else
{
/*
* Check the named interface...
*/
for (iface = (cupsd_netif_t *)cupsArrayFirst(NetIFList);
iface;
iface = (cupsd_netif_t *)cupsArrayNext(NetIFList))
{
if (strcmp(mask->mask.name.name, iface->name))
continue;
if (iface->address.addr.sa_family == AF_INET)
{
/*
* Check IPv4 address...
*/
if ((netip4 & iface->mask.ipv4.sin_addr.s_addr) ==
(iface->address.ipv4.sin_addr.s_addr &
iface->mask.ipv4.sin_addr.s_addr))
return (1);
}
#ifdef AF_INET6
else
{
/*
* Check IPv6 address...
*/
for (i = 0; i < 4; i ++)
if ((netip6[i] & iface->mask.ipv6.sin6_addr.s6_addr32[i]) !=
(iface->address.ipv6.sin6_addr.s6_addr32[i] &
iface->mask.ipv6.sin6_addr.s6_addr32[i]))
break;
if (i == 4)
return (1);
}
#endif /* AF_INET6 */
}
}
break;
case CUPSD_AUTH_NAME :
/*
* Check for exact name match...
*/
if (!_cups_strcasecmp(name, mask->mask.name.name))
return (1);
/*
* Check for domain match...
*/
if (name_len >= mask->mask.name.length &&
mask->mask.name.name[0] == '.' &&
!_cups_strcasecmp(name + name_len - mask->mask.name.length,
mask->mask.name.name))
return (1);
break;
case CUPSD_AUTH_IP :
/*
* Check for IP/network address match...
*/
for (i = 0; i < 4; i ++)
if ((ip[i] & mask->mask.ip.netmask[i]) !=
mask->mask.ip.address[i])
break;
if (i == 4)
return (1);
break;
}
}
return (0);
}
/*
* 'cupsdCheckGroup()' - Check for a user's group membership.
*/
int /* O - 1 if user is a member, 0 otherwise */
cupsdCheckGroup(
const char *username, /* I - User name */
struct passwd *user, /* I - System user info */
const char *groupname) /* I - Group name */
{
int i; /* Looping var */
struct group *group; /* Group info */
gid_t groupid; /* ID of named group */
#ifdef HAVE_MBR_UID_TO_UUID
uuid_t useruuid, /* UUID for username */
groupuuid; /* UUID for groupname */
int is_member; /* True if user is a member of group */
#endif /* HAVE_MBR_UID_TO_UUID */
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCheckGroup(username=\"%s\", user=%p, groupname=\"%s\")", username, user, groupname);
/*
* Validate input...
*/
if (!username || !groupname)
return (0);
/*
* Check to see if the user is a member of the named group...
*/
group = getgrnam(groupname);
endgrent();
if (group != NULL)
{
/*
* Group exists, check it...
*/
groupid = group->gr_gid;
for (i = 0; group->gr_mem[i]; i ++)
{
/*
* User appears in the group membership...
*/
if (!_cups_strcasecmp(username, group->gr_mem[i]))
return (1);
}
#ifdef HAVE_GETGROUPLIST
/*
* If the user isn't in the group membership list, try the results from
* getgrouplist() which is supposed to return the full list of groups a user
* belongs to...
*/
if (user)
{
int ngroups; /* Number of groups */
# ifdef __APPLE__
int groups[2048]; /* Groups that user belongs to */
# else
gid_t groups[2048]; /* Groups that user belongs to */
# endif /* __APPLE__ */
ngroups = (int)(sizeof(groups) / sizeof(groups[0]));
# ifdef __APPLE__
getgrouplist(username, (int)user->pw_gid, groups, &ngroups);
# else
getgrouplist(username, user->pw_gid, groups, &ngroups);
#endif /* __APPLE__ */
for (i = 0; i < ngroups; i ++)
if ((int)groupid == (int)groups[i])
return (1);
}
#endif /* HAVE_GETGROUPLIST */
}
else
groupid = (gid_t)-1;
/*
* Group doesn't exist or user not in group list, check the group ID
* against the user's group ID...
*/
if (user && groupid == user->pw_gid)
return (1);
#ifdef HAVE_MBR_UID_TO_UUID
/*
* Check group membership through macOS membership API...
*/
if (user && !mbr_uid_to_uuid(user->pw_uid, useruuid))
{
if (groupid != (gid_t)-1)
{
/*
* Map group name to UUID and check membership...
*/
if (!mbr_gid_to_uuid(groupid, groupuuid))
if (!mbr_check_membership(useruuid, groupuuid, &is_member))
if (is_member)
return (1);
}
else if (groupname[0] == '#')
{
/*
* Use UUID directly and check for equality (user UUID) and
* membership (group UUID)...
*/
if (!uuid_parse((char *)groupname + 1, groupuuid))
{
if (!uuid_compare(useruuid, groupuuid))
return (1);
else if (!mbr_check_membership(useruuid, groupuuid, &is_member))
if (is_member)
return (1);
}
return (0);
}
}
else if (groupname[0] == '#')
return (0);
#endif /* HAVE_MBR_UID_TO_UUID */
/*
* If we get this far, then the user isn't part of the named group...
*/
return (0);
}
/*
* 'cupsdCopyLocation()' - Make a copy of a location...
*/
cupsd_location_t * /* O - New location */
cupsdCopyLocation(
cupsd_location_t *loc) /* I - Original location */
{
cupsd_location_t *temp; /* New location */
/*
* Make a copy of the original location...
*/
if ((temp = calloc(1, sizeof(cupsd_location_t))) == NULL)
return (NULL);
/*
* Copy the information from the original location to the new one.
*/
if (!loc)
return (temp);
if (loc->location)
temp->location = _cupsStrAlloc(loc->location);
temp->length = loc->length;
temp->limit = loc->limit;
temp->order_type = loc->order_type;
temp->type = loc->type;
temp->level = loc->level;
temp->satisfy = loc->satisfy;
temp->encryption = loc->encryption;
if (loc->names)
{
if ((temp->names = cupsArrayDup(loc->names)) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to allocate memory for %d names: %s",
cupsArrayCount(loc->names), strerror(errno));
cupsdFreeLocation(temp);
return (NULL);
}
}
if (loc->allow)
{
/*
* Copy allow rules...
*/
if ((temp->allow = cupsArrayDup(loc->allow)) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to allocate memory for %d allow rules: %s",
cupsArrayCount(loc->allow), strerror(errno));
cupsdFreeLocation(temp);
return (NULL);
}
}
if (loc->deny)
{
/*
* Copy deny rules...
*/
if ((temp->deny = cupsArrayDup(loc->deny)) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Unable to allocate memory for %d deny rules: %s",
cupsArrayCount(loc->deny), strerror(errno));
cupsdFreeLocation(temp);
return (NULL);
}
}
return (temp);
}
/*
* 'cupsdDeleteAllLocations()' - Free all memory used for location authorization.
*/
void
cupsdDeleteAllLocations(void)
{
/*
* Free the location array, which will free all of the locations...
*/
cupsArrayDelete(Locations);
Locations = NULL;
}
/*
* 'cupsdFindBest()' - Find the location entry that best matches the resource.
*/
cupsd_location_t * /* O - Location that matches */
cupsdFindBest(const char *path, /* I - Resource path */
http_state_t state) /* I - HTTP state/request */
{
char uri[HTTP_MAX_URI],
/* URI in request... */
*uriptr; /* Pointer into URI */
cupsd_location_t *loc, /* Current location */
*best; /* Best match for location so far */
size_t bestlen; /* Length of best match */
int limit; /* Limit field */
static const int limits[] = /* Map http_status_t to CUPSD_AUTH_LIMIT_xyz */
{
CUPSD_AUTH_LIMIT_ALL,
CUPSD_AUTH_LIMIT_OPTIONS,
CUPSD_AUTH_LIMIT_GET,
CUPSD_AUTH_LIMIT_GET,
CUPSD_AUTH_LIMIT_HEAD,
CUPSD_AUTH_LIMIT_POST,
CUPSD_AUTH_LIMIT_POST,
CUPSD_AUTH_LIMIT_POST,
CUPSD_AUTH_LIMIT_PUT,
CUPSD_AUTH_LIMIT_PUT,
CUPSD_AUTH_LIMIT_DELETE,
CUPSD_AUTH_LIMIT_TRACE,
CUPSD_AUTH_LIMIT_ALL,
CUPSD_AUTH_LIMIT_ALL,
CUPSD_AUTH_LIMIT_ALL,
CUPSD_AUTH_LIMIT_ALL
};
/*
* First copy the connection URI to a local string so we have drop
* any .ppd extension from the pathname in /printers or /classes
* URIs...
*/
strlcpy(uri, path, sizeof(uri));
if ((uriptr = strchr(uri, '?')) != NULL)
*uriptr = '\0'; /* Drop trailing query string */
if ((uriptr = uri + strlen(uri) - 1) > uri && *uriptr == '/')
*uriptr = '\0'; /* Remove trailing '/' */
if (!strncmp(uri, "/printers/", 10) ||
!strncmp(uri, "/classes/", 9))
{
/*
* Check if the URI has .ppd on the end...
*/
uriptr = uri + strlen(uri) - 4; /* len > 4 if we get here... */
if (!strcmp(uriptr, ".ppd"))
*uriptr = '\0';
}
/*
* Loop through the list of locations to find a match...
*/
limit = limits[state];
best = NULL;
bestlen = 0;
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindBest: uri=\"%s\", limit=%x...", uri, limit);
for (loc = (cupsd_location_t *)cupsArrayFirst(Locations);
loc;
loc = (cupsd_location_t *)cupsArrayNext(Locations))
{
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindBest: Location %s(%d) Limit %x", loc->location ? loc->location : "(null)", (int)loc->length, loc->limit);
if (!strncmp(uri, "/printers/", 10) || !strncmp(uri, "/classes/", 9))
{
/*
* Use case-insensitive comparison for queue names...
*/
if (loc->length > bestlen && loc->location &&
!_cups_strncasecmp(uri, loc->location, loc->length) &&
loc->location[0] == '/' &&
(limit & loc->limit) != 0)
{
best = loc;
bestlen = loc->length;
}
}
else
{
/*
* Use case-sensitive comparison for other URIs...
*/
if (loc->length > bestlen && loc->location &&
!strncmp(uri, loc->location, loc->length) &&
loc->location[0] == '/' &&
(limit & loc->limit) != 0)
{
best = loc;
bestlen = loc->length;
}
}
}
/*
* Return the match, if any...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindBest: best=%s", best ? best->location : "NONE");
return (best);
}
/*
* 'cupsdFindLocation()' - Find the named location.
*/
cupsd_location_t * /* O - Location that matches */
cupsdFindLocation(const char *location) /* I - Connection */
{
cupsd_location_t key; /* Search key */
key.location = (char *)location;
return ((cupsd_location_t *)cupsArrayFind(Locations, &key));
}
/*
* 'cupsdFreeLocation()' - Free all memory used by a location.
*/
void
cupsdFreeLocation(cupsd_location_t *loc)/* I - Location to free */
{
cupsArrayDelete(loc->names);
cupsArrayDelete(loc->allow);
cupsArrayDelete(loc->deny);
_cupsStrFree(loc->location);
free(loc);
}
/*
* 'cupsdIsAuthorized()' - Check to see if the user is authorized...
*/
http_status_t /* O - HTTP_OK if authorized or error code */
cupsdIsAuthorized(cupsd_client_t *con, /* I - Connection */
const char *owner)/* I - Owner of object */
{
int i, /* Looping vars */
auth, /* Authorization status */
type; /* Type of authentication */
http_addr_t *hostaddr = httpGetAddress(con->http);
/* Client address */
const char *hostname = httpGetHostname(con->http, NULL, 0);
/* Client hostname */
unsigned address[4]; /* Authorization address */
cupsd_location_t *best; /* Best match for location so far */
size_t hostlen; /* Length of hostname */
char *name, /* Current username */
username[256], /* Username to authorize */
ownername[256], /* Owner name to authorize */
*ptr; /* Pointer into username */
struct passwd *pw; /* User password data */
static const char * const levels[] = /* Auth levels */
{
"ANON",
"USER",
"GROUP"
};
static const char * const types[] = /* Auth types */
{
"None",
"Basic",
"Negotiate"
};
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: con->uri=\"%s\", con->best=%p(%s)", con->uri, con->best, con->best ? con->best->location ? con->best->location : "(null)" : "");
if (owner)
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: owner=\"%s\"", owner);
/*
* If there is no "best" authentication rule for this request, then
* access is allowed from the local system and denied from other
* addresses...
*/
if (!con->best)
{
if (httpAddrLocalhost(httpGetAddress(con->http)) ||
!strcmp(hostname, ServerName) ||
cupsArrayFind(ServerAlias, (void *)hostname))
return (HTTP_OK);
else
return (HTTP_FORBIDDEN);
}
best = con->best;
if ((type = best->type) == CUPSD_AUTH_DEFAULT)
type = cupsdDefaultAuthType();
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: level=CUPSD_AUTH_%s, type=%s, satisfy=CUPSD_AUTH_SATISFY_%s, num_names=%d", levels[best->level], types[type], best->satisfy ? "ANY" : "ALL", cupsArrayCount(best->names));
if (best->limit == CUPSD_AUTH_LIMIT_IPP)
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: op=%x(%s)", best->op, ippOpString(best->op));
/*
* Check host/ip-based accesses...
*/
#ifdef AF_INET6
if (httpAddrFamily(hostaddr) == AF_INET6)
{
/*
* Copy IPv6 address...
*/
address[0] = ntohl(hostaddr->ipv6.sin6_addr.s6_addr32[0]);
address[1] = ntohl(hostaddr->ipv6.sin6_addr.s6_addr32[1]);
address[2] = ntohl(hostaddr->ipv6.sin6_addr.s6_addr32[2]);
address[3] = ntohl(hostaddr->ipv6.sin6_addr.s6_addr32[3]);
}
else
#endif /* AF_INET6 */
if (con->http->hostaddr->addr.sa_family == AF_INET)
{
/*
* Copy IPv4 address...
*/
address[0] = 0;
address[1] = 0;
address[2] = 0;
address[3] = ntohl(hostaddr->ipv4.sin_addr.s_addr);
}
else
memset(address, 0, sizeof(address));
hostlen = strlen(hostname);
auth = cupsdCheckAccess(address, hostname, hostlen, best)
? CUPSD_AUTH_ALLOW : CUPSD_AUTH_DENY;
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: auth=CUPSD_AUTH_%s...", auth ? "DENY" : "ALLOW");
if (auth == CUPSD_AUTH_DENY && best->satisfy == CUPSD_AUTH_SATISFY_ALL)
return (HTTP_FORBIDDEN);
#ifdef HAVE_SSL
/*
* See if encryption is required...
*/
if ((best->encryption >= HTTP_ENCRYPT_REQUIRED && !con->http->tls &&
_cups_strcasecmp(hostname, "localhost") &&
!httpAddrLocalhost(hostaddr) &&
best->satisfy == CUPSD_AUTH_SATISFY_ALL) &&
!(type == CUPSD_AUTH_NEGOTIATE ||
(type == CUPSD_AUTH_NONE &&
cupsdDefaultAuthType() == CUPSD_AUTH_NEGOTIATE)))
{
cupsdLogMessage(CUPSD_LOG_DEBUG,
"cupsdIsAuthorized: Need upgrade to TLS...");
return (HTTP_UPGRADE_REQUIRED);
}
#endif /* HAVE_SSL */
/*
* Now see what access level is required...
*/
if (best->level == CUPSD_AUTH_ANON || /* Anonymous access - allow it */
(type == CUPSD_AUTH_NONE && cupsArrayCount(best->names) == 0))
return (HTTP_OK);
if (!con->username[0] && type == CUPSD_AUTH_NONE &&
best->limit == CUPSD_AUTH_LIMIT_IPP)
{
/*
* Check for unauthenticated username...
*/
ipp_attribute_t *attr; /* requesting-user-name attribute */
attr = ippFindAttribute(con->request, "requesting-user-name", IPP_TAG_NAME);
if (attr)
{
cupsdLogMessage(CUPSD_LOG_DEBUG,
"cupsdIsAuthorized: requesting-user-name=\"%s\"",
attr->values[0].string.text);
strlcpy(username, attr->values[0].string.text, sizeof(username));
}
else if (best->satisfy == CUPSD_AUTH_SATISFY_ALL || auth == CUPSD_AUTH_DENY)
return (HTTP_UNAUTHORIZED); /* Non-anonymous needs user/pass */
else
return (HTTP_OK); /* unless overridden with Satisfy */
}
else
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdIsAuthorized: username=\"%s\"",
con->username);
#ifdef HAVE_AUTHORIZATION_H
if (!con->username[0] && !con->authref)
#else
if (!con->username[0])
#endif /* HAVE_AUTHORIZATION_H */
{
if (best->satisfy == CUPSD_AUTH_SATISFY_ALL || auth == CUPSD_AUTH_DENY)
return (HTTP_UNAUTHORIZED); /* Non-anonymous needs user/pass */
else
return (HTTP_OK); /* unless overridden with Satisfy */
}
if (con->type != type && type != CUPSD_AUTH_NONE &&
#ifdef HAVE_GSSAPI
(type != CUPSD_AUTH_NEGOTIATE || con->gss_uid <= 0) &&
#endif /* HAVE_GSSAPI */
con->type != CUPSD_AUTH_BASIC)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "Authorized using %s, expected %s.",
types[con->type], types[type]);
return (HTTP_UNAUTHORIZED);
}
strlcpy(username, con->username, sizeof(username));
}
/*
* OK, got a username. See if we need normal user access, or group
* access... (root always matches)
*/
if (!strcmp(username, "root"))
return (HTTP_OK);
/*
* Strip any @domain or @KDC from the username and owner...
*/
if ((ptr = strchr(username, '@')) != NULL)
*ptr = '\0';
if (owner)
{
strlcpy(ownername, owner, sizeof(ownername));
if ((ptr = strchr(ownername, '@')) != NULL)
*ptr = '\0';
}
else
ownername[0] = '\0';
/*
* Get the user info...
*/
if (username[0])
{
pw = getpwnam(username);
endpwent();
}
else
pw = NULL;
if (best->level == CUPSD_AUTH_USER)
{
/*
* If there are no names associated with this location, then
* any valid user is OK...
*/
if (cupsArrayCount(best->names) == 0)
return (HTTP_OK);
/*
* Otherwise check the user list and return OK if this user is
* allowed...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: Checking user membership...");
#ifdef HAVE_AUTHORIZATION_H
/*
* If an authorization reference was supplied it must match a right name...
*/
if (con->authref)
{
for (name = (char *)cupsArrayFirst(best->names);
name;
name = (char *)cupsArrayNext(best->names))
{
if (!_cups_strncasecmp(name, "@AUTHKEY(", 9) && check_authref(con, name + 9))
return (HTTP_OK);
else if (!_cups_strcasecmp(name, "@SYSTEM") && SystemGroupAuthKey &&
check_authref(con, SystemGroupAuthKey))
return (HTTP_OK);
}
return (HTTP_FORBIDDEN);
}
#endif /* HAVE_AUTHORIZATION_H */
for (name = (char *)cupsArrayFirst(best->names);
name;
name = (char *)cupsArrayNext(best->names))
{
if (!_cups_strcasecmp(name, "@OWNER") && owner &&
!_cups_strcasecmp(username, ownername))
return (HTTP_OK);
else if (!_cups_strcasecmp(name, "@SYSTEM"))
{
for (i = 0; i < NumSystemGroups; i ++)
if (cupsdCheckGroup(username, pw, SystemGroups[i]))
return (HTTP_OK);
}
else if (name[0] == '@')
{
if (cupsdCheckGroup(username, pw, name + 1))
return (HTTP_OK);
}
else if (!_cups_strcasecmp(username, name))
return (HTTP_OK);
}
return (con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED);
}
/*
* Check to see if this user is in any of the named groups...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: Checking group membership...");
/*
* Check to see if this user is in any of the named groups...
*/
for (name = (char *)cupsArrayFirst(best->names);
name;
name = (char *)cupsArrayNext(best->names))
{
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdIsAuthorized: Checking group \"%s\" membership...", name);
if (!_cups_strcasecmp(name, "@SYSTEM"))
{
for (i = 0; i < NumSystemGroups; i ++)
if (cupsdCheckGroup(username, pw, SystemGroups[i]))
return (HTTP_OK);
}
else if (cupsdCheckGroup(username, pw, name))
return (HTTP_OK);
}
/*
* The user isn't part of the specified group, so deny access...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdIsAuthorized: User not in group(s).");
return (con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED);
}
/*
* 'cupsdNewLocation()' - Create a new location for authorization.
*
* Note: Still need to call cupsdAddLocation() to add it to the list of global
* locations.
*/
cupsd_location_t * /* O - Pointer to new location record */
cupsdNewLocation(const char *location) /* I - Location path */
{
cupsd_location_t *temp; /* New location */
/*
* Try to allocate memory for the new location.
*/
if ((temp = calloc(1, sizeof(cupsd_location_t))) == NULL)
return (NULL);
/*
* Initialize the record and copy the name over...
*/
if ((temp->location = _cupsStrAlloc(location)) == NULL)
{
free(temp);
return (NULL);
}
temp->length = strlen(temp->location);
/*
* Return the new record...
*/
return (temp);
}
#ifdef HAVE_AUTHORIZATION_H
/*
* 'check_authref()' - Check if an authorization services reference has the
* supplied right.
*/
static int /* O - 1 if right is valid, 0 otherwise */
check_authref(cupsd_client_t *con, /* I - Connection */
const char *right) /* I - Right name */
{
OSStatus status; /* OS Status */
AuthorizationItem authright; /* Authorization right */
AuthorizationRights authrights; /* Authorization rights */
AuthorizationFlags authflags; /* Authorization flags */
/*
* Check to see if the user is allowed to perform the task...
*/
if (!con->authref)
return (0);
authright.name = right;
authright.valueLength = 0;
authright.value = NULL;
authright.flags = 0;
authrights.count = 1;
authrights.items = &authright;
authflags = kAuthorizationFlagDefaults |
kAuthorizationFlagExtendRights;
if ((status = AuthorizationCopyRights(con->authref, &authrights,
kAuthorizationEmptyEnvironment,
authflags, NULL)) != 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "AuthorizationCopyRights(\"%s\") returned %d", authright.name, (int)status);
return (0);
}
cupsdLogMessage(CUPSD_LOG_DEBUG2, "AuthorizationCopyRights(\"%s\") succeeded.", authright.name);
return (1);
}
#endif /* HAVE_AUTHORIZATION_H */
/*
* 'compare_locations()' - Compare two locations.
*/
static int /* O - Result of comparison */
compare_locations(cupsd_location_t *a, /* I - First location */
cupsd_location_t *b) /* I - Second location */
{
return (strcmp(b->location, a->location));
}
/*
* 'copy_authmask()' - Copy function for auth masks.
*/
static cupsd_authmask_t * /* O - New auth mask */
copy_authmask(cupsd_authmask_t *mask, /* I - Existing auth mask */
void *data) /* I - User data (unused) */
{
cupsd_authmask_t *temp; /* New auth mask */
(void)data;
if ((temp = malloc(sizeof(cupsd_authmask_t))) != NULL)
{
memcpy(temp, mask, sizeof(cupsd_authmask_t));
if (temp->type == CUPSD_AUTH_NAME || temp->type == CUPSD_AUTH_INTERFACE)
{
/*
* Make a copy of the name...
*/
if ((temp->mask.name.name = _cupsStrAlloc(temp->mask.name.name)) == NULL)
{
/*
* Failed to make copy...
*/
free(temp);
temp = NULL;
}
}
}
return (temp);
}
/*
* 'free_authmask()' - Free function for auth masks.
*/
static void
free_authmask(cupsd_authmask_t *mask, /* I - Auth mask to free */
void *data) /* I - User data (unused) */
{
(void)data;
if (mask->type == CUPSD_AUTH_NAME || mask->type == CUPSD_AUTH_INTERFACE)
_cupsStrFree(mask->mask.name.name);
free(mask);
}
#if HAVE_LIBPAM
/*
* 'pam_func()' - PAM conversation function.
*/
static int /* O - Success or failure */
pam_func(
int num_msg, /* I - Number of messages */
const struct pam_message **msg, /* I - Messages */
struct pam_response **resp, /* O - Responses */
void *appdata_ptr)
/* I - Pointer to connection */
{
int i; /* Looping var */
struct pam_response *replies; /* Replies */
cupsd_authdata_t *data; /* Pointer to auth data */
/*
* Allocate memory for the responses...
*/
if ((replies = malloc(sizeof(struct pam_response) * (size_t)num_msg)) == NULL)
return (PAM_CONV_ERR);
/*
* Answer all of the messages...
*/
data = (cupsd_authdata_t *)appdata_ptr;
for (i = 0; i < num_msg; i ++)
{
switch (msg[i]->msg_style)
{
case PAM_PROMPT_ECHO_ON:
replies[i].resp_retcode = PAM_SUCCESS;
replies[i].resp = strdup(data->username);
break;
case PAM_PROMPT_ECHO_OFF:
replies[i].resp_retcode = PAM_SUCCESS;
replies[i].resp = strdup(data->password);
break;
case PAM_TEXT_INFO:
replies[i].resp_retcode = PAM_SUCCESS;
replies[i].resp = NULL;
break;
case PAM_ERROR_MSG:
replies[i].resp_retcode = PAM_SUCCESS;
replies[i].resp = NULL;
break;
default:
free(replies);
return (PAM_CONV_ERR);
}
}
/*
* Return the responses back to PAM...
*/
*resp = replies;
return (PAM_SUCCESS);
}
#endif /* HAVE_LIBPAM */
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