[exim.git] / src / src / tlscert-gnu.c

/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) Jeremy Harris 2014 */

/* This file provides TLS/SSL support for Exim using the GnuTLS library,
one of the available supported implementations.  This file is #included into
tls.c when USE_GNUTLS has been set.
*/

#include <gnutls/gnutls.h>
/* needed for cert checks in verification and DN extraction: */
#include <gnutls/x509.h>
/* needed to disable PKCS11 autoload unless requested */
#if GNUTLS_VERSION_NUMBER >= 0x020c00
# include <gnutls/pkcs11.h>
#endif


/*****************************************************
*  Export/import a certificate, binary/printable
*****************************************************/
int
tls_export_cert(uschar * buf, size_t buflen, void * cert)
{
size_t sz = buflen;
void * reset_point = store_get(0);
int fail = 0;
uschar * cp;

if (gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
    GNUTLS_X509_FMT_PEM, buf, &sz))
  return 1;
if ((cp = string_printing(buf)) != buf)
  {
  Ustrncpy(buf, cp, buflen);
  if (buf[buflen-1])
    fail = 1;
  }
store_reset(reset_point);
return fail;
}

int
tls_import_cert(const uschar * buf, void ** cert)
{
void * reset_point = store_get(0);
gnutls_datum_t datum;
gnutls_x509_crt_t crt;
int fail = 0;

gnutls_global_init();
gnutls_x509_crt_init(&crt);

datum.data = string_unprinting(US buf);
datum.size = Ustrlen(datum.data);
if (gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM))
  fail = 1;
else
  *cert = (void *)crt;

store_reset(reset_point);
return fail;
}

void
tls_free_cert(void * cert)
{
gnutls_x509_crt_deinit((gnutls_x509_crt_t) cert);
gnutls_global_deinit();
}

/*****************************************************
*  Certificate field extraction routines
*****************************************************/
static uschar *
time_copy(time_t t)
{
uschar * cp = store_get(32);
struct tm * tp = gmtime(&t);
size_t len = strftime(CS cp, 32, "%b %e %T %Y %Z", tp);
return len > 0 ? cp : NULL;
}

/**/

uschar *
tls_cert_issuer(void * cert, uschar * mod)
{
uschar txt[256];
size_t sz = sizeof(txt);
return ( gnutls_x509_crt_get_issuer_dn(cert, CS txt, &sz) == 0 )
  ? string_copy(txt) : NULL;
}

uschar *
tls_cert_not_after(void * cert, uschar * mod)
{
return time_copy(
  gnutls_x509_crt_get_expiration_time((gnutls_x509_crt_t)cert));
}

uschar *
tls_cert_not_before(void * cert, uschar * mod)
{
return time_copy(
  gnutls_x509_crt_get_activation_time((gnutls_x509_crt_t)cert));
}

uschar *
tls_cert_serial_number(void * cert, uschar * mod)
{
uschar bin[50], txt[150];
size_t sz = sizeof(bin);
uschar * sp;
uschar * dp;

if (gnutls_x509_crt_get_serial((gnutls_x509_crt_t)cert,
    bin, &sz) || sz > sizeof(bin))
  return NULL;
for(dp = txt, sp = bin; sz; dp += 2, sp++, sz--)
  sprintf(dp, "%.2x", *sp);
for(sp = txt; sp[0]=='0' && sp[1]; ) sp++;	/* leading zeroes */
return string_copy(sp);
}

uschar *
tls_cert_signature(void * cert, uschar * mod)
{
uschar * cp1;
uschar * cp2;
uschar * cp3;
size_t len = 0;
int ret;

if ((ret = gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len)) !=
	GNUTLS_E_SHORT_MEMORY_BUFFER)
  {
  fprintf(stderr, "%s: gs0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
  return NULL;
  }

cp1 = store_get(len*4+1);

if (gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len) != 0)
  {
  fprintf(stderr, "%s: gs1 fail\n", __FUNCTION__);
  return NULL;
  }

for(cp3 = cp2 = cp1+len; cp1 < cp2; cp3 += 3, cp1++)
  sprintf(cp3, "%.2x ", *cp1);
cp3[-1]= '\0';

return cp2;
}

uschar *
tls_cert_signature_algorithm(void * cert, uschar * mod)
{
gnutls_sign_algorithm_t algo =
  gnutls_x509_crt_get_signature_algorithm((gnutls_x509_crt_t)cert);
return algo < 0 ? NULL : string_copy(gnutls_sign_get_name(algo));
}

uschar *
tls_cert_subject(void * cert, uschar * mod)
{
static uschar txt[256];
size_t sz = sizeof(txt);
return ( gnutls_x509_crt_get_dn(cert, CS txt, &sz) == 0 )
  ? string_copy(txt) : NULL;
}

uschar *
tls_cert_version(void * cert, uschar * mod)
{
return string_sprintf("%d", gnutls_x509_crt_get_version(cert));
}

uschar *
tls_cert_ext_by_oid(void * cert, uschar * oid, int idx)
{
uschar * cp1 = NULL;
uschar * cp2;
uschar * cp3;
size_t siz = 0;
unsigned int crit;
int ret;

ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
  oid, idx, cp1, &siz, &crit);
if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
  {
  fprintf(stderr, "%s: ge0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
  return NULL;
  }

cp1 = store_get(siz*4 + 1);

ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
  oid, idx, cp1, &siz, &crit);
if (ret < 0)
  {
  fprintf(stderr, "%s: ge1 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
  return NULL;
  }

/* binary data, DER encoded */

/* just dump for now */
for(cp3 = cp2 = cp1+siz; cp1 < cp2; cp3 += 3, cp1++)
  sprintf(cp3, "%.2x ", *cp1);
cp3[-1]= '\0';

return cp2;
}

uschar *
tls_cert_subject_altname(void * cert, uschar * mod)
{
uschar * list = NULL;
int index;
size_t siz;
int ret;
uschar sep = '\n';
uschar * tag = US"";
uschar * ele;
int match = -1;

while (mod)
  {
  if (*mod == '>' && *++mod) sep = *mod++;
  else if (Ustrcmp(mod, "dns")==0) { match = GNUTLS_SAN_DNSNAME; mod += 3; }
  else if (Ustrcmp(mod, "uri")==0) { match = GNUTLS_SAN_URI; mod += 3; }
  else if (Ustrcmp(mod, "mail")==0) { match = GNUTLS_SAN_RFC822NAME; mod += 4; }
  else continue;

  if (*mod++ != ',')
    break;
  }

for(index = 0;; index++)
  {
  siz = 0;
  switch(ret = gnutls_x509_crt_get_subject_alt_name(
    (gnutls_x509_crt_t)cert, index, NULL, &siz, NULL))
    {
    case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
      return list;	/* no more elements; normal exit */

    case GNUTLS_E_SHORT_MEMORY_BUFFER:
      break;

    default:
      expand_string_message = 
	string_sprintf("%s: gs0 fail: %d %s\n", __FUNCTION__,
	  ret, gnutls_strerror(ret));
      return NULL;
    }

  ele = store_get(siz+1);
  if ((ret = gnutls_x509_crt_get_subject_alt_name(
    (gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
    {
    expand_string_message = 
      string_sprintf("%s: gs1 fail: %d %s\n", __FUNCTION__,
	ret, gnutls_strerror(ret));
    return NULL;
    }
  ele[siz] = '\0';

  if (match != -1 && match != ret)
    continue;
  switch (ret)
    {
    case GNUTLS_SAN_DNSNAME:    tag = US"DNS";  break;
    case GNUTLS_SAN_URI:        tag = US"URI";  break; 
    case GNUTLS_SAN_RFC822NAME: tag = US"MAIL"; break;
    default: continue;        /* ignore unrecognised types */
    }
  list = string_append_listele(list, sep, 
          match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
  }
/*NOTREACHED*/
}

uschar *
tls_cert_ocsp_uri(void * cert, uschar * mod)
{
#if GNUTLS_VERSION_NUMBER >= 0x030000
gnutls_datum_t uri;
int ret;
uschar sep = '\n';
int index;
uschar * list = NULL;

if (mod)
  if (*mod == '>' && *++mod) sep = *mod++;

for(index = 0;; index++)
  {
  ret = gnutls_x509_crt_get_authority_info_access((gnutls_x509_crt_t)cert,
	  index, GNUTLS_IA_OCSP_URI, &uri, NULL);

  if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
    return list;
  if (ret < 0)
    {
    expand_string_message = 
      string_sprintf("%s: gai fail: %d %s\n", __FUNCTION__,
	ret, gnutls_strerror(ret));
    return NULL;
    }

  list = string_append_listele(list, sep,
	    string_copyn(uri.data, uri.size));
  }
/*NOTREACHED*/

#else

expand_string_message = 
  string_sprintf("%s: OCSP support with GnuTLS requires version 3.0.0\n",
    __FUNCTION__);
return NULL;

#endif
}

uschar *
tls_cert_crl_uri(void * cert, uschar * mod)
{
int ret;
size_t siz;
uschar sep = '\n';
int index;
uschar * list = NULL;
uschar * ele;

if (mod)
  if (*mod == '>' && *++mod) sep = *mod++;

for(index = 0;; index++)
  {
  siz = 0;
  switch(ret = gnutls_x509_crt_get_crl_dist_points(
    (gnutls_x509_crt_t)cert, index, NULL, &siz, NULL, NULL))
    {
    case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
      return list;
    case GNUTLS_E_SHORT_MEMORY_BUFFER:
      break;
    default:
      expand_string_message = 
	string_sprintf("%s: gc0 fail: %d %s\n", __FUNCTION__,
	  ret, gnutls_strerror(ret));
      return NULL;
    }

  ele = store_get(siz+1);
  if ((ret = gnutls_x509_crt_get_crl_dist_points(
    (gnutls_x509_crt_t)cert, index, ele, &siz, NULL, NULL)) < 0)
    {
    expand_string_message = 
      string_sprintf("%s: gc1 fail: %d %s\n", __FUNCTION__,
	ret, gnutls_strerror(ret));
    return NULL;
    }
  ele[siz] = '\0';
  list = string_append_listele(list, sep, ele);
  }
/*NOTREACHED*/
}


/* vi: aw ai sw=2
*/
/* End of tlscert-gnu.c */
Commit	Line	Data
9d1c15ef JH	1	/*************************************************
	2	* Exim - an Internet mail transport agent *
	3	*************************************************/
	4
	5	/* Copyright (c) Jeremy Harris 2014 */
	6
	7	/* This file provides TLS/SSL support for Exim using the GnuTLS library,
	8	one of the available supported implementations. This file is #included into
	9	tls.c when USE_GNUTLS has been set.
	10	*/
	11
	12	#include <gnutls/gnutls.h>
	13	/* needed for cert checks in verification and DN extraction: */
	14	#include <gnutls/x509.h>
	15	/* needed to disable PKCS11 autoload unless requested */
	16	#if GNUTLS_VERSION_NUMBER >= 0x020c00
	17	# include <gnutls/pkcs11.h>
	18	#endif
	19
	20
	21	/*****************************************************
	22	* Export/import a certificate, binary/printable
	23	*****************************************************/
	24	int
	25	tls_export_cert(uschar * buf, size_t buflen, void * cert)
	26	{
	27	size_t sz = buflen;
	28	void * reset_point = store_get(0);
	29	int fail = 0;
	30	uschar * cp;
	31
	32	if (gnutls_x509_crt_export((gnutls_x509_crt_t)cert,
	33	GNUTLS_X509_FMT_PEM, buf, &sz))
	34	return 1;
	35	if ((cp = string_printing(buf)) != buf)
	36	{
	37	Ustrncpy(buf, cp, buflen);
	38	if (buf[buflen-1])
	39	fail = 1;
	40	}
	41	store_reset(reset_point);
	42	return fail;
	43	}
	44
	45	int
	46	tls_import_cert(const uschar * buf, void ** cert)
	47	{
	48	void * reset_point = store_get(0);
	49	gnutls_datum_t datum;
	50	gnutls_x509_crt_t crt;
	51	int fail = 0;
	52
	53	gnutls_global_init();
	54	gnutls_x509_crt_init(&crt);
	55
	56	datum.data = string_unprinting(US buf);
	57	datum.size = Ustrlen(datum.data);
	58	if (gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM))
	59	fail = 1;
	60	else
	61	cert = (void )crt;
	62
	63	store_reset(reset_point);
	64	return fail;
65	}
66
67	void
68	tls_free_cert(void * cert)
69	{
70	gnutls_x509_crt_deinit((gnutls_x509_crt_t) cert);
71	gnutls_global_deinit();
72	}
73
74	/*****************************************************
75	* Certificate field extraction routines
76	*****************************************************/
77	static uschar *
78	time_copy(time_t t)
79	{
80	uschar * cp = store_get(32);
81	struct tm * tp = gmtime(&t);
82	size_t len = strftime(CS cp, 32, "%b %e %T %Y %Z", tp);
83	return len > 0 ? cp : NULL;
84	}
85
86	/**/
87
88	uschar *
9e4dddbd	89	tls_cert_issuer(void * cert, uschar * mod)
9d1c15ef JH	90	{
	91	uschar txt[256];
	92	size_t sz = sizeof(txt);
	93	return ( gnutls_x509_crt_get_issuer_dn(cert, CS txt, &sz) == 0 )
	94	? string_copy(txt) : NULL;
	95	}
	96
	97	uschar *
9e4dddbd	98	tls_cert_not_after(void * cert, uschar * mod)
9d1c15ef JH	99	{
	100	return time_copy(
	101	gnutls_x509_crt_get_expiration_time((gnutls_x509_crt_t)cert));
	102	}
	103
	104	uschar *
9e4dddbd	105	tls_cert_not_before(void * cert, uschar * mod)
9d1c15ef JH	106	{
	107	return time_copy(
	108	gnutls_x509_crt_get_activation_time((gnutls_x509_crt_t)cert));
	109	}
	110
	111	uschar *
9e4dddbd	112	tls_cert_serial_number(void * cert, uschar * mod)
9d1c15ef JH	113	{
	114	uschar bin[50], txt[150];
	115	size_t sz = sizeof(bin);
	116	uschar * sp;
	117	uschar * dp;
	118
	119	if (gnutls_x509_crt_get_serial((gnutls_x509_crt_t)cert,
	120	bin, &sz) \|\| sz > sizeof(bin))
	121	return NULL;
	122	for(dp = txt, sp = bin; sz; dp += 2, sp++, sz--)
	123	sprintf(dp, "%.2x", *sp);
	124	for(sp = txt; sp[0]=='0' && sp[1]; ) sp++; /* leading zeroes */
	125	return string_copy(sp);
	126	}
	127
	128	uschar *
9e4dddbd	129	tls_cert_signature(void * cert, uschar * mod)
9d1c15ef JH	130	{
	131	uschar * cp1;
	132	uschar * cp2;
	133	uschar * cp3;
	134	size_t len = 0;
	135	int ret;
	136
	137	if ((ret = gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len)) !=
	138	GNUTLS_E_SHORT_MEMORY_BUFFER)
	139	{
	140	fprintf(stderr, "%s: gs0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
	141	return NULL;
	142	}
	143
	144	cp1 = store_get(len*4+1);
	145
	146	if (gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len) != 0)
	147	{
	148	fprintf(stderr, "%s: gs1 fail\n", __FUNCTION__);
	149	return NULL;
	150	}
	151
	152	for(cp3 = cp2 = cp1+len; cp1 < cp2; cp3 += 3, cp1++)
	153	sprintf(cp3, "%.2x ", *cp1);
	154	cp3[-1]= '\0';
	155
	156	return cp2;
	157	}
	158
	159	uschar *
9e4dddbd	160	tls_cert_signature_algorithm(void * cert, uschar * mod)
9d1c15ef JH	161	{
	162	gnutls_sign_algorithm_t algo =
	163	gnutls_x509_crt_get_signature_algorithm((gnutls_x509_crt_t)cert);
	164	return algo < 0 ? NULL : string_copy(gnutls_sign_get_name(algo));
	165	}
	166
	167	uschar *
9e4dddbd	168	tls_cert_subject(void * cert, uschar * mod)
9d1c15ef JH	169	{
	170	static uschar txt[256];
	171	size_t sz = sizeof(txt);
	172	return ( gnutls_x509_crt_get_dn(cert, CS txt, &sz) == 0 )
	173	? string_copy(txt) : NULL;
	174	}
	175
	176	uschar *
9e4dddbd	177	tls_cert_version(void * cert, uschar * mod)
9d1c15ef JH	178	{
	179	return string_sprintf("%d", gnutls_x509_crt_get_version(cert));
	180	}
	181
	182	uschar *
	183	tls_cert_ext_by_oid(void * cert, uschar * oid, int idx)
	184	{
	185	uschar * cp1 = NULL;
	186	uschar * cp2;
	187	uschar * cp3;
	188	size_t siz = 0;
	189	unsigned int crit;
	190	int ret;
	191
	192	ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
	193	oid, idx, cp1, &siz, &crit);
	194	if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
	195	{
	196	fprintf(stderr, "%s: ge0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
	197	return NULL;
	198	}
	199
	200	cp1 = store_get(siz*4 + 1);
	201
	202	ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
	203	oid, idx, cp1, &siz, &crit);
	204	if (ret < 0)
	205	{
	206	fprintf(stderr, "%s: ge1 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
	207	return NULL;
	208	}
	209
	210	/* binary data, DER encoded */
	211
	212	/* just dump for now */
	213	for(cp3 = cp2 = cp1+siz; cp1 < cp2; cp3 += 3, cp1++)
	214	sprintf(cp3, "%.2x ", *cp1);
	215	cp3[-1]= '\0';
	216
	217	return cp2;
	218	}
	219
	220	uschar *
9e4dddbd	221	tls_cert_subject_altname(void * cert, uschar * mod)
9d1c15ef	222	{
9e4dddbd JH	223	uschar * list = NULL;
	224	int index;
	225	size_t siz;
9d1c15ef	226	int ret;
9e4dddbd JH	227	uschar sep = '\n';
	228	uschar * tag = US"";
	229	uschar * ele;
	230	int match = -1;
9d1c15ef	231
9e4dddbd	232	while (mod)
9d1c15ef	233	{
9e4dddbd JH	234	if (mod == '>' && ++mod) sep = *mod++;
	235	else if (Ustrcmp(mod, "dns")==0) { match = GNUTLS_SAN_DNSNAME; mod += 3; }
	236	else if (Ustrcmp(mod, "uri")==0) { match = GNUTLS_SAN_URI; mod += 3; }
	237	else if (Ustrcmp(mod, "mail")==0) { match = GNUTLS_SAN_RFC822NAME; mod += 4; }
	238	else continue;
	239
	240	if (*mod++ != ',')
9d1c15ef	241	break;
9d1c15ef JH	242	}
9d1c15ef JH	243
9e4dddbd	244	for(index = 0;; index++)
9d1c15ef	245	{
9e4dddbd JH	246	siz = 0;
	247	switch(ret = gnutls_x509_crt_get_subject_alt_name(
	248	(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL))
	249	{
	250	case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
	251	return list; /* no more elements; normal exit */
	252
	253	case GNUTLS_E_SHORT_MEMORY_BUFFER:
	254	break;
	255
	256	default:
	257	expand_string_message =
	258	string_sprintf("%s: gs0 fail: %d %s\n", __FUNCTION__,
	259	ret, gnutls_strerror(ret));
	260	return NULL;
	261	}
	262
	263	ele = store_get(siz+1);
	264	if ((ret = gnutls_x509_crt_get_subject_alt_name(
	265	(gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
	266	{
	267	expand_string_message =
	268	string_sprintf("%s: gs1 fail: %d %s\n", __FUNCTION__,
	269	ret, gnutls_strerror(ret));
	270	return NULL;
	271	}
	272	ele[siz] = '\0';
	273
	274	if (match != -1 && match != ret)
	275	continue;
	276	switch (ret)
	277	{
	278	case GNUTLS_SAN_DNSNAME: tag = US"DNS"; break;
	279	case GNUTLS_SAN_URI: tag = US"URI"; break;
	280	case GNUTLS_SAN_RFC822NAME: tag = US"MAIL"; break;
	281	default: continue; /* ignore unrecognised types */
	282	}
	283	list = string_append_listele(list, sep,
	284	match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
9d1c15ef	285	}
9e4dddbd	286	/NOTREACHED/
9d1c15ef JH	287	}
	288
	289	uschar *
9e4dddbd	290	tls_cert_ocsp_uri(void * cert, uschar * mod)
9d1c15ef JH	291	{
	292	#if GNUTLS_VERSION_NUMBER >= 0x030000
	293	gnutls_datum_t uri;
9e4dddbd JH	294	int ret;
	295	uschar sep = '\n';
	296	int index;
	297	uschar * list = NULL;
	298
	299	if (mod)
	300	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef	301
9e4dddbd JH	302	for(index = 0;; index++)
	303	{
	304	ret = gnutls_x509_crt_get_authority_info_access((gnutls_x509_crt_t)cert,
	305	index, GNUTLS_IA_OCSP_URI, &uri, NULL);
9d1c15ef	306
9e4dddbd JH	307	if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
	308	return list;
	309	if (ret < 0)
	310	{
	311	expand_string_message =
	312	string_sprintf("%s: gai fail: %d %s\n", __FUNCTION__,
	313	ret, gnutls_strerror(ret));
	314	return NULL;
	315	}
9d1c15ef	316
9e4dddbd JH	317	list = string_append_listele(list, sep,
	318	string_copyn(uri.data, uri.size));
	319	}
	320	/NOTREACHED/
9d1c15ef JH	321
	322	#else
	323
	324	expand_string_message =
	325	string_sprintf("%s: OCSP support with GnuTLS requires version 3.0.0\n",
	326	__FUNCTION__);
	327	return NULL;
	328
	329	#endif
	330	}
	331
	332	uschar *
9e4dddbd	333	tls_cert_crl_uri(void * cert, uschar * mod)
9d1c15ef JH	334	{
9d1c15ef JH	335	int ret;
9e4dddbd JH	336	size_t siz;
	337	uschar sep = '\n';
	338	int index;
	339	uschar * list = NULL;
	340	uschar * ele;
	341
	342	if (mod)
	343	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef	344
9e4dddbd	345	for(index = 0;; index++)
9d1c15ef	346	{
9e4dddbd JH	347	siz = 0;
	348	switch(ret = gnutls_x509_crt_get_crl_dist_points(
	349	(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL, NULL))
	350	{
	351	case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
	352	return list;
	353	case GNUTLS_E_SHORT_MEMORY_BUFFER:
	354	break;
	355	default:
	356	expand_string_message =
	357	string_sprintf("%s: gc0 fail: %d %s\n", __FUNCTION__,
	358	ret, gnutls_strerror(ret));
	359	return NULL;
	360	}
	361
	362	ele = store_get(siz+1);
	363	if ((ret = gnutls_x509_crt_get_crl_dist_points(
	364	(gnutls_x509_crt_t)cert, index, ele, &siz, NULL, NULL)) < 0)
	365	{
9d1c15ef	366	expand_string_message =
9e4dddbd	367	string_sprintf("%s: gc1 fail: %d %s\n", __FUNCTION__,
9d1c15ef JH	368	ret, gnutls_strerror(ret));
9d1c15ef JH	369	return NULL;
9e4dddbd JH	370	}
	371	ele[siz] = '\0';
	372	list = string_append_listele(list, sep, ele);
9d1c15ef	373	}
9e4dddbd	374	/NOTREACHED/
9d1c15ef JH	375	}
	376
	377
	378	/* vi: aw ai sw=2
	379	*/
	380	/* End of tlscert-gnu.c */