[thirdparty/cups.git] / scheduler / cert.c

/*
 * "$Id: cert.c 7673 2008-06-18 22:31:26Z mike $"
 *
 *   Authentication certificate routines for the Common UNIX
 *   Printing System (CUPS).
 *
 *   Copyright 2007-2009 by Apple Inc.
 *   Copyright 1997-2006 by Easy Software Products.
 *
 *   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/".
 *
 * Contents:
 *
 *   cupsdAddCert()        - Add a certificate.
 *   cupsdDeleteCert()     - Delete a single certificate.
 *   cupsdDeleteAllCerts() - Delete all certificates...
 *   cupsdFindCert()       - Find a certificate.
 *   cupsdInitCerts()      - Initialize the certificate "system" and root
 *                           certificate.
 */

/*
 * Include necessary headers...
 */

#include "cupsd.h"
#ifdef HAVE_ACL_INIT
#  include <sys/acl.h>
#  ifdef HAVE_MEMBERSHIP_H
#    include <membership.h>
#  endif /* HAVE_MEMBERSHIP_H */
#endif /* HAVE_ACL_INIT */


/*
 * 'cupsdAddCert()' - Add a certificate.
 */

void
cupsdAddCert(int        pid,		/* I - Process ID */
             const char *username,	/* I - Username */
             void       *ccache)	/* I - Kerberos credentials or NULL */
{
  int		i;			/* Looping var */
  cupsd_cert_t	*cert;			/* Current certificate */
  int		fd;			/* Certificate file */
  char		filename[1024];		/* Certificate filename */
  static const char hex[] = "0123456789ABCDEF";
					/* Hex constants... */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdAddCert: Adding certificate for PID %d", pid);

 /*
  * Allocate memory for the certificate...
  */

  if ((cert = calloc(sizeof(cupsd_cert_t), 1)) == NULL)
    return;

 /*
  * Fill in the certificate information...
  */

  cert->pid = pid;
  strlcpy(cert->username, username, sizeof(cert->username));

  for (i = 0; i < 32; i ++)
    cert->certificate[i] = hex[CUPS_RAND() & 15];

 /*
  * Save the certificate to a file readable only by the User and Group
  * (or root and SystemGroup for PID == 0)...
  */

  snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, pid);
  unlink(filename);

  if ((fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0400)) < 0)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to create certificate file %s - %s",
                    filename, strerror(errno));
    free(cert);
    return;
  }

  if (pid == 0)
  {
#ifdef HAVE_ACL_INIT
    acl_t		acl;		/* ACL information */
    acl_entry_t		entry;		/* ACL entry */
    acl_permset_t	permset;	/* Permissions */
#  ifdef HAVE_MBR_UID_TO_UUID
    uuid_t		group;		/* Group ID */
#  endif /* HAVE_MBR_UID_TO_UUID */
    static int		acls_not_supported = 0;
					/* Only warn once */
#endif /* HAVE_ACL_INIT */


   /*
    * Root certificate...
    */

    fchmod(fd, 0440);
    fchown(fd, RunUser, SystemGroupIDs[0]);

    cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddCert: NumSystemGroups=%d",
                    NumSystemGroups);

#ifdef HAVE_ACL_INIT
    if (NumSystemGroups > 1)
    {
     /*
      * Set POSIX ACLs for the root certificate so that all system
      * groups can access it...
      */

#  ifdef HAVE_MBR_UID_TO_UUID
     /*
      * On MacOS X, ACLs use UUIDs instead of GIDs...
      */

      acl = acl_init(NumSystemGroups - 1);

      for (i = 1; i < NumSystemGroups; i ++)
      {
       /*
        * Add each group ID to the ACL...
	*/

        acl_create_entry(&acl, &entry);
	acl_get_permset(entry, &permset);
	acl_add_perm(permset, ACL_READ_DATA);
	acl_set_tag_type(entry, ACL_EXTENDED_ALLOW);
	mbr_gid_to_uuid((gid_t)SystemGroupIDs[i], group);
	acl_set_qualifier(entry, &group);
	acl_set_permset(entry, permset);
      }
#  else
     /*
      * POSIX ACLs need permissions for owner, group, other, and mask
      * in addition to the rest of the system groups...
      */

      acl = acl_init(NumSystemGroups + 3);

      /* Owner */
      acl_create_entry(&acl, &entry);
      acl_get_permset(entry, &permset);
      acl_add_perm(permset, ACL_READ);
      acl_set_tag_type(entry, ACL_USER_OBJ);
      acl_set_permset(entry, permset);

      /* Group */
      acl_create_entry(&acl, &entry);
      acl_get_permset(entry, &permset);
      acl_add_perm(permset, ACL_READ);
      acl_set_tag_type(entry, ACL_GROUP_OBJ);
      acl_set_permset(entry, permset);

      /* Others */
      acl_create_entry(&acl, &entry);
      acl_get_permset(entry, &permset);
      acl_add_perm(permset, 0);
      acl_set_tag_type(entry, ACL_OTHER);
      acl_set_permset(entry, permset);

      /* Mask */
      acl_create_entry(&acl, &entry);
      acl_get_permset(entry, &permset);
      acl_add_perm(permset, ACL_READ);
      acl_set_tag_type(entry, ACL_MASK);
      acl_set_permset(entry, permset);

      for (i = 1; i < NumSystemGroups; i ++)
      {
       /*
        * Add each group ID to the ACL...
	*/

        acl_create_entry(&acl, &entry);
	acl_get_permset(entry, &permset);
	acl_add_perm(permset, ACL_READ);
	acl_set_tag_type(entry, ACL_GROUP);
	acl_set_qualifier(entry, SystemGroupIDs + i);
	acl_set_permset(entry, permset);
      }

      if (acl_valid(acl))
      {
        char *text, *textptr;		/* Temporary string */


        cupsdLogMessage(CUPSD_LOG_ERROR, "ACL did not validate: %s",
	                strerror(errno));
        text = acl_to_text(acl, NULL);
	for (textptr = strchr(text, '\n');
	     textptr;
	     textptr = strchr(textptr + 1, '\n'))
	  *textptr = ',';

	cupsdLogMessage(CUPSD_LOG_ERROR, "ACL: %s", text);
	free(text);
      }
#  endif /* HAVE_MBR_UID_TO_UUID */

      if (acl_set_fd(fd, acl))
      {
	if (errno != EOPNOTSUPP || !acls_not_supported)
	  cupsdLogMessage(CUPSD_LOG_ERROR,
			  "Unable to set ACLs on root certificate \"%s\" - %s",
			  filename, strerror(errno));

	if (errno == EOPNOTSUPP)
	  acls_not_supported = 1;
      }

      acl_free(acl);
    }
#endif /* HAVE_ACL_INIT */

    RootCertTime = time(NULL);
  }
  else
  {
   /*
    * CGI certificate...
    */

    fchmod(fd, 0400);
    fchown(fd, User, Group);
  }

  DEBUG_printf(("ADD pid=%d, username=%s, cert=%s\n", pid, username,
                cert->certificate));

  write(fd, cert->certificate, strlen(cert->certificate));
  close(fd);

 /*
  * Add Kerberos credentials as needed...
  */

#ifdef HAVE_GSSAPI
  cert->ccache = (krb5_ccache)ccache;
#else
  (void)ccache;
#endif /* HAVE_GSSAPI */

 /*
  * Insert the certificate at the front of the list...
  */

  cert->next = Certs;
  Certs      = cert;
}


/*
 * 'cupsdDeleteCert()' - Delete a single certificate.
 */

void
cupsdDeleteCert(int pid)		/* I - Process ID */
{
  cupsd_cert_t	*cert,			/* Current certificate */
		*prev;			/* Previous certificate */
  char		filename[1024];		/* Certificate file */


  for (prev = NULL, cert = Certs; cert != NULL; prev = cert, cert = cert->next)
    if (cert->pid == pid)
    {
     /*
      * Remove this certificate from the list...
      */

      cupsdLogMessage(CUPSD_LOG_DEBUG2,
                      "cupsdDeleteCert: Removing certificate for PID %d", pid);

      DEBUG_printf(("DELETE pid=%d, username=%s, cert=%s\n", cert->pid,
                    cert->username, cert->certificate));

      if (prev == NULL)
        Certs = cert->next;
      else
        prev->next = cert->next;

#ifdef HAVE_GSSAPI
     /*
      * Release Kerberos credentials as needed...
      */

      if (cert->ccache)
	krb5_cc_destroy(KerberosContext, cert->ccache);
#endif /* HAVE_GSSAPI */

      free(cert);

     /*
      * Delete the file and return...
      */

      snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, pid);
      if (unlink(filename))
	cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to remove %s!", filename);

      return;
    }
}


/*
 * 'cupsdDeleteAllCerts()' - Delete all certificates...
 */

void
cupsdDeleteAllCerts(void)
{
  cupsd_cert_t	*cert,			/* Current certificate */
		*next;			/* Next certificate */
  char		filename[1024];		/* Certificate file */


 /*
  * Loop through each certificate, deleting them...
  */

  for (cert = Certs; cert != NULL; cert = next)
  {
   /*
    * Delete the file...
    */

    snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, cert->pid);
    if (unlink(filename))
      cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to remove %s!", filename);

   /*
    * Free memory...
    */

    next = cert->next;
    free(cert);
  }

  Certs        = NULL;
  RootCertTime = 0;
}


/*
 * 'cupsdFindCert()' - Find a certificate.
 */

cupsd_cert_t *				/* O - Matching certificate or NULL */
cupsdFindCert(const char *certificate)	/* I - Certificate */
{
  cupsd_cert_t	*cert;			/* Current certificate */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert(certificate=%s)",
                  certificate);
  for (cert = Certs; cert != NULL; cert = cert->next)
    if (!strcasecmp(certificate, cert->certificate))
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert: Returning %s...",
                      cert->username);
      return (cert);
    }

  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert: Certificate not found!");

  return (NULL);
}


/*
 * 'cupsdInitCerts()' - Initialize the certificate "system" and root
 *                      certificate.
 */

void
cupsdInitCerts(void)
{
  cups_file_t	*fp;			/* /dev/random file */
  unsigned	seed;			/* Seed for random number generator */
  struct timeval tod;			/* Time of day */


 /*
  * Initialize the random number generator using the random device or
  * the current time, as available...
  */

  if ((fp = cupsFileOpen("/dev/urandom", "rb")) == NULL)
  {
   /*
    * Get the time in usecs and use it as the initial seed...
    */

    gettimeofday(&tod, NULL);

    seed = (unsigned)(tod.tv_sec + tod.tv_usec);
  }
  else
  {
   /*
    * Read 4 random characters from the random device and use
    * them as the seed...
    */

    seed = cupsFileGetChar(fp);
    seed = (seed << 8) | cupsFileGetChar(fp);
    seed = (seed << 8) | cupsFileGetChar(fp);
    seed = (seed << 8) | cupsFileGetChar(fp);

    cupsFileClose(fp);
  }

  CUPS_SRAND(seed);

 /*
  * Create a root certificate and return...
  */

  if (!RunUser)
    cupsdAddCert(0, "root", NULL);
}


/*
 * End of "$Id: cert.c 7673 2008-06-18 22:31:26Z mike $".
 */
Commit	Line	Data
ef416fc2	1	/*
75bd9771	2	* "$Id: cert.c 7673 2008-06-18 22:31:26Z mike $"
ef416fc2	3	*
	4	* Authentication certificate routines for the Common UNIX
	5	* Printing System (CUPS).
	6	*
b9faaae1	7	* Copyright 2007-2009 by Apple Inc.
bd7854cb	8	* Copyright 1997-2006 by Easy Software Products.
ef416fc2	9	*
ef416fc2	10	* These coded instructions, statements, and computer programs are the
bc44d920	11	* property of Apple Inc. and are protected by Federal copyright
	12	* law. Distribution and use rights are outlined in the file "LICENSE.txt"
	13	* which should have been included with this file. If this file is
	14	* file is missing or damaged, see the license at "http://www.cups.org/".
ef416fc2	15	*
	16	* Contents:
	17	*
	18	* cupsdAddCert() - Add a certificate.
	19	* cupsdDeleteCert() - Delete a single certificate.
	20	* cupsdDeleteAllCerts() - Delete all certificates...
	21	* cupsdFindCert() - Find a certificate.
	22	* cupsdInitCerts() - Initialize the certificate "system" and root
	23	* certificate.
	24	*/
	25
	26	/*
	27	* Include necessary headers...
	28	*/
	29
	30	#include "cupsd.h"
fa73b229	31	#ifdef HAVE_ACL_INIT
fa73b229	32	# include <sys/acl.h>
bd7854cb	33	# ifdef HAVE_MEMBERSHIP_H
	34	# include <membership.h>
	35	# endif /* HAVE_MEMBERSHIP_H */
fa73b229	36	#endif /* HAVE_ACL_INIT */
ef416fc2	37
	38
	39	/*
	40	* 'cupsdAddCert()' - Add a certificate.
	41	*/
	42
	43	void
	44	cupsdAddCert(int pid, /* I - Process ID */
5bd77a73 MS	45	const char username, / I - Username */
5bd77a73 MS	46	void ccache) / I - Kerberos credentials or NULL */
ef416fc2	47	{
	48	int i; /* Looping var */
	49	cupsd_cert_t cert; / Current certificate */
	50	int fd; /* Certificate file */
	51	char filename[1024]; /* Certificate filename */
	52	static const char hex[] = "0123456789ABCDEF";
	53	/* Hex constants... */
	54
	55
	56	cupsdLogMessage(CUPSD_LOG_DEBUG2,
b9faaae1	57	"cupsdAddCert: Adding certificate for PID %d", pid);
ef416fc2	58
	59	/*
	60	* Allocate memory for the certificate...
	61	*/
	62
	63	if ((cert = calloc(sizeof(cupsd_cert_t), 1)) == NULL)
	64	return;
	65
	66	/*
	67	* Fill in the certificate information...
	68	*/
	69
	70	cert->pid = pid;
	71	strlcpy(cert->username, username, sizeof(cert->username));
	72
	73	for (i = 0; i < 32; i ++)
41681883	74	cert->certificate[i] = hex[CUPS_RAND() & 15];
ef416fc2	75
	76	/*
	77	* Save the certificate to a file readable only by the User and Group
	78	* (or root and SystemGroup for PID == 0)...
	79	*/
	80
	81	snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, pid);
	82	unlink(filename);
	83
	84	if ((fd = open(filename, O_WRONLY \| O_CREAT \| O_EXCL, 0400)) < 0)
	85	{
	86	cupsdLogMessage(CUPSD_LOG_ERROR,
b9faaae1	87	"Unable to create certificate file %s - %s",
ef416fc2	88	filename, strerror(errno));
	89	free(cert);
	90	return;
	91	}
	92
	93	if (pid == 0)
	94	{
fa73b229	95	#ifdef HAVE_ACL_INIT
	96	acl_t acl; /* ACL information */
	97	acl_entry_t entry; /* ACL entry */
	98	acl_permset_t permset; /* Permissions */
bd7854cb	99	# ifdef HAVE_MBR_UID_TO_UUID
fa73b229	100	uuid_t group; /* Group ID */
bd7854cb	101	# endif /* HAVE_MBR_UID_TO_UUID */
e53920b9	102	static int acls_not_supported = 0;
e53920b9	103	/* Only warn once */
fa73b229	104	#endif /* HAVE_ACL_INIT */
	105
	106
ef416fc2	107	/*
	108	* Root certificate...
	109	*/
	110
	111	fchmod(fd, 0440);
	112	fchown(fd, RunUser, SystemGroupIDs[0]);
	113
bd7854cb	114	cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAddCert: NumSystemGroups=%d",
	115	NumSystemGroups);
	116
fa73b229	117	#ifdef HAVE_ACL_INIT
	118	if (NumSystemGroups > 1)
	119	{
	120	/*
	121	* Set POSIX ACLs for the root certificate so that all system
	122	* groups can access it...
	123	*/
	124
bd7854cb	125	# ifdef HAVE_MBR_UID_TO_UUID
	126	/*
	127	* On MacOS X, ACLs use UUIDs instead of GIDs...
	128	*/
	129
fa73b229	130	acl = acl_init(NumSystemGroups - 1);
	131
	132	for (i = 1; i < NumSystemGroups; i ++)
	133	{
	134	/*
	135	* Add each group ID to the ACL...
	136	*/
	137
	138	acl_create_entry(&acl, &entry);
	139	acl_get_permset(entry, &permset);
	140	acl_add_perm(permset, ACL_READ_DATA);
	141	acl_set_tag_type(entry, ACL_EXTENDED_ALLOW);
	142	mbr_gid_to_uuid((gid_t)SystemGroupIDs[i], group);
	143	acl_set_qualifier(entry, &group);
	144	acl_set_permset(entry, permset);
	145	}
bd7854cb	146	# else
	147	/*
	148	* POSIX ACLs need permissions for owner, group, other, and mask
	149	* in addition to the rest of the system groups...
	150	*/
	151
	152	acl = acl_init(NumSystemGroups + 3);
	153
	154	/* Owner */
	155	acl_create_entry(&acl, &entry);
	156	acl_get_permset(entry, &permset);
	157	acl_add_perm(permset, ACL_READ);
	158	acl_set_tag_type(entry, ACL_USER_OBJ);
	159	acl_set_permset(entry, permset);
	160
	161	/* Group */
	162	acl_create_entry(&acl, &entry);
	163	acl_get_permset(entry, &permset);
	164	acl_add_perm(permset, ACL_READ);
	165	acl_set_tag_type(entry, ACL_GROUP_OBJ);
	166	acl_set_permset(entry, permset);
	167
	168	/* Others */
	169	acl_create_entry(&acl, &entry);
	170	acl_get_permset(entry, &permset);
4744bd90	171	acl_add_perm(permset, 0);
bd7854cb	172	acl_set_tag_type(entry, ACL_OTHER);
	173	acl_set_permset(entry, permset);
	174
	175	/* Mask */
	176	acl_create_entry(&acl, &entry);
	177	acl_get_permset(entry, &permset);
	178	acl_add_perm(permset, ACL_READ);
	179	acl_set_tag_type(entry, ACL_MASK);
	180	acl_set_permset(entry, permset);
	181
	182	for (i = 1; i < NumSystemGroups; i ++)
	183	{
	184	/*
	185	* Add each group ID to the ACL...
	186	*/
	187
	188	acl_create_entry(&acl, &entry);
	189	acl_get_permset(entry, &permset);
	190	acl_add_perm(permset, ACL_READ);
	191	acl_set_tag_type(entry, ACL_GROUP);
	192	acl_set_qualifier(entry, SystemGroupIDs + i);
	193	acl_set_permset(entry, permset);
	194	}
	195
	196	if (acl_valid(acl))
	197	{
e53920b9	198	char text, textptr; /* Temporary string */
e53920b9	199
bd7854cb	200
	201	cupsdLogMessage(CUPSD_LOG_ERROR, "ACL did not validate: %s",
	202	strerror(errno));
	203	text = acl_to_text(acl, NULL);
	204	for (textptr = strchr(text, '\n');
	205	textptr;
	206	textptr = strchr(textptr + 1, '\n'))
	207	*textptr = ',';
	208
	209	cupsdLogMessage(CUPSD_LOG_ERROR, "ACL: %s", text);
	210	free(text);
	211	}
	212	# endif /* HAVE_MBR_UID_TO_UUID */
fa73b229	213
fa73b229	214	if (acl_set_fd(fd, acl))
e53920b9	215	{
	216	if (errno != EOPNOTSUPP \|\| !acls_not_supported)
	217	cupsdLogMessage(CUPSD_LOG_ERROR,
	218	"Unable to set ACLs on root certificate \"%s\" - %s",
	219	filename, strerror(errno));
	220
	221	if (errno == EOPNOTSUPP)
	222	acls_not_supported = 1;
	223	}
	224
fa73b229	225	acl_free(acl);
	226	}
	227	#endif /* HAVE_ACL_INIT */
	228
ef416fc2	229	RootCertTime = time(NULL);
	230	}
	231	else
	232	{
	233	/*
	234	* CGI certificate...
	235	*/
	236
	237	fchmod(fd, 0400);
	238	fchown(fd, User, Group);
	239	}
	240
	241	DEBUG_printf(("ADD pid=%d, username=%s, cert=%s\n", pid, username,
	242	cert->certificate));
	243
	244	write(fd, cert->certificate, strlen(cert->certificate));
	245	close(fd);
	246
5bd77a73 MS	247	/*
	248	* Add Kerberos credentials as needed...
	249	*/
	250
	251	#ifdef HAVE_GSSAPI
	252	cert->ccache = (krb5_ccache)ccache;
	253	#else
	254	(void)ccache;
	255	#endif /* HAVE_GSSAPI */
	256
ef416fc2	257	/*
	258	* Insert the certificate at the front of the list...
	259	*/
	260
	261	cert->next = Certs;
	262	Certs = cert;
	263	}
	264
	265
	266	/*
	267	* 'cupsdDeleteCert()' - Delete a single certificate.
	268	*/
	269
	270	void
	271	cupsdDeleteCert(int pid) /* I - Process ID */
	272	{
	273	cupsd_cert_t cert, / Current certificate */
	274	prev; / Previous certificate */
	275	char filename[1024]; /* Certificate file */
	276
	277
	278	for (prev = NULL, cert = Certs; cert != NULL; prev = cert, cert = cert->next)
	279	if (cert->pid == pid)
	280	{
	281	/*
	282	* Remove this certificate from the list...
	283	*/
	284
	285	cupsdLogMessage(CUPSD_LOG_DEBUG2,
b9faaae1	286	"cupsdDeleteCert: Removing certificate for PID %d", pid);
ef416fc2	287
	288	DEBUG_printf(("DELETE pid=%d, username=%s, cert=%s\n", cert->pid,
	289	cert->username, cert->certificate));
	290
	291	if (prev == NULL)
	292	Certs = cert->next;
	293	else
	294	prev->next = cert->next;
	295
5bd77a73 MS	296	#ifdef HAVE_GSSAPI
	297	/*
	298	* Release Kerberos credentials as needed...
	299	*/
	300
	301	if (cert->ccache)
	302	krb5_cc_destroy(KerberosContext, cert->ccache);
	303	#endif /* HAVE_GSSAPI */
	304
ef416fc2	305	free(cert);
	306
	307	/*
	308	* Delete the file and return...
	309	*/
	310
	311	snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, pid);
	312	if (unlink(filename))
b9faaae1	313	cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to remove %s!", filename);
ef416fc2	314
	315	return;
	316	}
	317	}
	318
	319
	320	/*
	321	* 'cupsdDeleteAllCerts()' - Delete all certificates...
	322	*/
	323
	324	void
	325	cupsdDeleteAllCerts(void)
	326	{
	327	cupsd_cert_t cert, / Current certificate */
	328	next; / Next certificate */
	329	char filename[1024]; /* Certificate file */
	330
	331
	332	/*
	333	* Loop through each certificate, deleting them...
	334	*/
	335
	336	for (cert = Certs; cert != NULL; cert = next)
	337	{
	338	/*
	339	* Delete the file...
	340	*/
	341
	342	snprintf(filename, sizeof(filename), "%s/certs/%d", StateDir, cert->pid);
	343	if (unlink(filename))
b9faaae1	344	cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to remove %s!", filename);
ef416fc2	345
	346	/*
	347	* Free memory...
	348	*/
	349
	350	next = cert->next;
	351	free(cert);
	352	}
	353
e1d6a774	354	Certs = NULL;
e1d6a774	355	RootCertTime = 0;
ef416fc2	356	}
	357
	358
	359	/*
	360	* 'cupsdFindCert()' - Find a certificate.
	361	*/
	362
db0bd74a	363	cupsd_cert_t * /* O - Matching certificate or NULL */
ef416fc2	364	cupsdFindCert(const char certificate) / I - Certificate */
	365	{
	366	cupsd_cert_t cert; / Current certificate */
	367
	368
b9faaae1 MS	369	cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert(certificate=%s)",
b9faaae1 MS	370	certificate);
ef416fc2	371	for (cert = Certs; cert != NULL; cert = cert->next)
	372	if (!strcasecmp(certificate, cert->certificate))
	373	{
b9faaae1 MS	374	cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert: Returning %s...",
b9faaae1 MS	375	cert->username);
db0bd74a	376	return (cert);
ef416fc2	377	}
ef416fc2	378
b9faaae1	379	cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFindCert: Certificate not found!");
ef416fc2	380
	381	return (NULL);
	382	}
	383
	384
	385	/*
	386	* 'cupsdInitCerts()' - Initialize the certificate "system" and root
	387	* certificate.
	388	*/
	389
	390	void
	391	cupsdInitCerts(void)
	392	{
	393	cups_file_t fp; / /dev/random file */
	394	unsigned seed; /* Seed for random number generator */
	395	struct timeval tod; /* Time of day */
	396
	397
	398	/*
	399	* Initialize the random number generator using the random device or
	400	* the current time, as available...
	401	*/
	402
	403	if ((fp = cupsFileOpen("/dev/urandom", "rb")) == NULL)
	404	{
	405	/*
	406	* Get the time in usecs and use it as the initial seed...
	407	*/
	408
	409	gettimeofday(&tod, NULL);
	410
	411	seed = (unsigned)(tod.tv_sec + tod.tv_usec);
	412	}
	413	else
	414	{
	415	/*
	416	* Read 4 random characters from the random device and use
	417	* them as the seed...
	418	*/
	419
	420	seed = cupsFileGetChar(fp);
	421	seed = (seed << 8) \| cupsFileGetChar(fp);
	422	seed = (seed << 8) \| cupsFileGetChar(fp);
	423	seed = (seed << 8) \| cupsFileGetChar(fp);
	424
	425	cupsFileClose(fp);
	426	}
	427
41681883	428	CUPS_SRAND(seed);
ef416fc2	429
	430	/*
	431	* Create a root certificate and return...
	432	*/
	433
	434	if (!RunUser)
5bd77a73	435	cupsdAddCert(0, "root", NULL);
ef416fc2	436	}
	437
	438
	439	/*
75bd9771	440	* End of "$Id: cert.c 7673 2008-06-18 22:31:26Z mike $".
ef416fc2	441	*/