[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 *
g_err(const char * tag, const char * from, int gnutls_err)
{
expand_string_message = string_sprintf("%s: %s fail: %s\n",
  from, tag, gnutls_strerror(gnutls_err));
return NULL;
}


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 * cp = NULL;
int ret;
size_t siz = 0;

if ((ret = gnutls_x509_crt_get_issuer_dn(cert, cp, &siz))
    != GNUTLS_E_SHORT_MEMORY_BUFFER)
  return g_err("gi0", __FUNCTION__, ret);

cp = store_get(siz);
if ((ret = gnutls_x509_crt_get_issuer_dn(cert, cp, &siz)) < 0)
  return g_err("gi1", __FUNCTION__, ret);

return mod ? tls_field_from_dn(cp, mod) : cp;
}

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)
  return g_err("gs0", __FUNCTION__, ret);

cp1 = store_get(len*4+1);
if (gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len) != 0)
  return g_err("gs1", __FUNCTION__, ret);

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)
{
uschar * cp = NULL;
int ret;
size_t siz = 0;

if ((ret = gnutls_x509_crt_get_dn(cert, cp, &siz))
    != GNUTLS_E_SHORT_MEMORY_BUFFER)
  return g_err("gs0", __FUNCTION__, ret);

cp = store_get(siz);
if ((ret = gnutls_x509_crt_get_dn(cert, cp, &siz)) < 0)
  return g_err("gs1", __FUNCTION__, ret);

return mod ? tls_field_from_dn(cp, mod) : cp;
}

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)
  return g_err("ge0", __FUNCTION__, ret);

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)
  return g_err("ge1", __FUNCTION__, ret);

/* 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:
      return g_err("gs0", __FUNCTION__, ret);
    }

  ele = store_get(siz+1);
  if ((ret = gnutls_x509_crt_get_subject_alt_name(
    (gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
    return g_err("gs1", __FUNCTION__, ret);
  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)
    return g_err("gai", __FUNCTION__, ret);

  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:
      return g_err("gc0", __FUNCTION__, ret);
    }

  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)
    return g_err("gc1", __FUNCTION__, ret);

  ele[siz] = '\0';
  list = string_append_listele(list, sep, ele);
  }
/*NOTREACHED*/
}


/*****************************************************
*  Certificate operator routines
*****************************************************/
static uschar *
fingerprint(gnutls_x509_crt_t cert, gnutls_digest_algorithm_t algo)
{
int ret;
size_t siz = 0;
uschar * cp;
uschar * cp2;
uschar * cp3;

if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, NULL, &siz))
    != GNUTLS_E_SHORT_MEMORY_BUFFER)
  return g_err("gf0", __FUNCTION__, ret);

cp = store_get(siz*3+1);
if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, cp, &siz)) < 0)
  return g_err("gf1", __FUNCTION__, ret);

for (cp3 = cp2 = cp+siz; cp < cp2; cp++, cp3+=2)
  sprintf(cp3, "%02X",*cp);
return cp2;
}


uschar *
tls_cert_fprt_md5(void * cert)
{
return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_MD5);
}

uschar *
tls_cert_fprt_sha1(void * cert)
{
return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_SHA1);
}

uschar *
tls_cert_fprt_sha256(void * cert)
{
return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_SHA256);
}


/* 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	*****************************************************/
8a6eec04 JH	77	static uschar *
	78	g_err(const char * tag, const char * from, int gnutls_err)
	79	{
812a6045 JH	80	expand_string_message = string_sprintf("%s: %s fail: %s\n",
812a6045 JH	81	from, tag, gnutls_strerror(gnutls_err));
8a6eec04 JH	82	return NULL;
	83	}
	84
	85
9d1c15ef JH	86	static uschar *
	87	time_copy(time_t t)
	88	{
	89	uschar * cp = store_get(32);
	90	struct tm * tp = gmtime(&t);
	91	size_t len = strftime(CS cp, 32, "%b %e %T %Y %Z", tp);
	92	return len > 0 ? cp : NULL;
	93	}
	94
	95	/**/
	96
	97	uschar *
9e4dddbd	98	tls_cert_issuer(void * cert, uschar * mod)
9d1c15ef	99	{
812a6045 JH	100	uschar * cp = NULL;
	101	int ret;
	102	size_t siz = 0;
	103
	104	if ((ret = gnutls_x509_crt_get_issuer_dn(cert, cp, &siz))
	105	!= GNUTLS_E_SHORT_MEMORY_BUFFER)
	106	return g_err("gi0", __FUNCTION__, ret);
	107
	108	cp = store_get(siz);
	109	if ((ret = gnutls_x509_crt_get_issuer_dn(cert, cp, &siz)) < 0)
	110	return g_err("gi1", __FUNCTION__, ret);
	111
	112	return mod ? tls_field_from_dn(cp, mod) : cp;
9d1c15ef JH	113	}
	114
	115	uschar *
9e4dddbd	116	tls_cert_not_after(void * cert, uschar * mod)
9d1c15ef JH	117	{
	118	return time_copy(
	119	gnutls_x509_crt_get_expiration_time((gnutls_x509_crt_t)cert));
	120	}
	121
	122	uschar *
9e4dddbd	123	tls_cert_not_before(void * cert, uschar * mod)
9d1c15ef JH	124	{
	125	return time_copy(
	126	gnutls_x509_crt_get_activation_time((gnutls_x509_crt_t)cert));
	127	}
	128
	129	uschar *
9e4dddbd	130	tls_cert_serial_number(void * cert, uschar * mod)
9d1c15ef JH	131	{
	132	uschar bin[50], txt[150];
	133	size_t sz = sizeof(bin);
	134	uschar * sp;
	135	uschar * dp;
	136
	137	if (gnutls_x509_crt_get_serial((gnutls_x509_crt_t)cert,
	138	bin, &sz) \|\| sz > sizeof(bin))
	139	return NULL;
	140	for(dp = txt, sp = bin; sz; dp += 2, sp++, sz--)
	141	sprintf(dp, "%.2x", *sp);
	142	for(sp = txt; sp[0]=='0' && sp[1]; ) sp++; /* leading zeroes */
	143	return string_copy(sp);
	144	}
	145
	146	uschar *
9e4dddbd	147	tls_cert_signature(void * cert, uschar * mod)
9d1c15ef JH	148	{
	149	uschar * cp1;
	150	uschar * cp2;
	151	uschar * cp3;
	152	size_t len = 0;
	153	int ret;
	154
812a6045 JH	155	if ((ret = gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len))
	156	!= GNUTLS_E_SHORT_MEMORY_BUFFER)
	157	return g_err("gs0", __FUNCTION__, ret);
9d1c15ef JH	158
9d1c15ef JH	159	cp1 = store_get(len*4+1);
9d1c15ef	160	if (gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len) != 0)
812a6045	161	return g_err("gs1", __FUNCTION__, ret);
9d1c15ef JH	162
	163	for(cp3 = cp2 = cp1+len; cp1 < cp2; cp3 += 3, cp1++)
	164	sprintf(cp3, "%.2x ", *cp1);
	165	cp3[-1]= '\0';
	166
	167	return cp2;
	168	}
	169
	170	uschar *
9e4dddbd	171	tls_cert_signature_algorithm(void * cert, uschar * mod)
9d1c15ef JH	172	{
	173	gnutls_sign_algorithm_t algo =
	174	gnutls_x509_crt_get_signature_algorithm((gnutls_x509_crt_t)cert);
	175	return algo < 0 ? NULL : string_copy(gnutls_sign_get_name(algo));
	176	}
	177
	178	uschar *
9e4dddbd	179	tls_cert_subject(void * cert, uschar * mod)
9d1c15ef	180	{
8a6eec04 JH	181	uschar * cp = NULL;
	182	int ret;
	183	size_t siz = 0;
	184
812a6045 JH	185	if ((ret = gnutls_x509_crt_get_dn(cert, cp, &siz))
	186	!= GNUTLS_E_SHORT_MEMORY_BUFFER)
	187	return g_err("gs0", __FUNCTION__, ret);
8a6eec04 JH	188
8a6eec04 JH	189	cp = store_get(siz);
812a6045 JH	190	if ((ret = gnutls_x509_crt_get_dn(cert, cp, &siz)) < 0)
812a6045 JH	191	return g_err("gs1", __FUNCTION__, ret);
8a6eec04	192
812a6045	193	return mod ? tls_field_from_dn(cp, mod) : cp;
9d1c15ef JH	194	}
	195
	196	uschar *
9e4dddbd	197	tls_cert_version(void * cert, uschar * mod)
9d1c15ef JH	198	{
	199	return string_sprintf("%d", gnutls_x509_crt_get_version(cert));
	200	}
	201
	202	uschar *
	203	tls_cert_ext_by_oid(void * cert, uschar * oid, int idx)
	204	{
	205	uschar * cp1 = NULL;
	206	uschar * cp2;
	207	uschar * cp3;
	208	size_t siz = 0;
	209	unsigned int crit;
	210	int ret;
	211
	212	ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
	213	oid, idx, cp1, &siz, &crit);
	214	if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
8a6eec04	215	return g_err("ge0", __FUNCTION__, ret);
9d1c15ef JH	216
	217	cp1 = store_get(siz*4 + 1);
	218
	219	ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
	220	oid, idx, cp1, &siz, &crit);
	221	if (ret < 0)
8a6eec04	222	return g_err("ge1", __FUNCTION__, ret);
9d1c15ef JH	223
	224	/* binary data, DER encoded */
	225
	226	/* just dump for now */
	227	for(cp3 = cp2 = cp1+siz; cp1 < cp2; cp3 += 3, cp1++)
	228	sprintf(cp3, "%.2x ", *cp1);
	229	cp3[-1]= '\0';
	230
	231	return cp2;
	232	}
	233
	234	uschar *
9e4dddbd	235	tls_cert_subject_altname(void * cert, uschar * mod)
9d1c15ef	236	{
9e4dddbd JH	237	uschar * list = NULL;
	238	int index;
	239	size_t siz;
9d1c15ef	240	int ret;
9e4dddbd JH	241	uschar sep = '\n';
	242	uschar * tag = US"";
	243	uschar * ele;
	244	int match = -1;
9d1c15ef	245
9e4dddbd	246	while (mod)
9d1c15ef	247	{
9e4dddbd JH	248	if (mod == '>' && ++mod) sep = *mod++;
	249	else if (Ustrcmp(mod, "dns")==0) { match = GNUTLS_SAN_DNSNAME; mod += 3; }
	250	else if (Ustrcmp(mod, "uri")==0) { match = GNUTLS_SAN_URI; mod += 3; }
	251	else if (Ustrcmp(mod, "mail")==0) { match = GNUTLS_SAN_RFC822NAME; mod += 4; }
	252	else continue;
	253
	254	if (*mod++ != ',')
9d1c15ef	255	break;
9d1c15ef JH	256	}
9d1c15ef JH	257
9e4dddbd	258	for(index = 0;; index++)
9d1c15ef	259	{
9e4dddbd JH	260	siz = 0;
	261	switch(ret = gnutls_x509_crt_get_subject_alt_name(
	262	(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL))
	263	{
	264	case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
	265	return list; /* no more elements; normal exit */
	266
	267	case GNUTLS_E_SHORT_MEMORY_BUFFER:
	268	break;
	269
	270	default:
8a6eec04	271	return g_err("gs0", __FUNCTION__, ret);
9e4dddbd JH	272	}
	273
	274	ele = store_get(siz+1);
	275	if ((ret = gnutls_x509_crt_get_subject_alt_name(
	276	(gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
8a6eec04	277	return g_err("gs1", __FUNCTION__, ret);
9e4dddbd JH	278	ele[siz] = '\0';
	279
	280	if (match != -1 && match != ret)
	281	continue;
	282	switch (ret)
	283	{
	284	case GNUTLS_SAN_DNSNAME: tag = US"DNS"; break;
	285	case GNUTLS_SAN_URI: tag = US"URI"; break;
	286	case GNUTLS_SAN_RFC822NAME: tag = US"MAIL"; break;
	287	default: continue; /* ignore unrecognised types */
	288	}
	289	list = string_append_listele(list, sep,
	290	match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
9d1c15ef	291	}
9e4dddbd	292	/NOTREACHED/
9d1c15ef JH	293	}
	294
	295	uschar *
9e4dddbd	296	tls_cert_ocsp_uri(void * cert, uschar * mod)
9d1c15ef JH	297	{
	298	#if GNUTLS_VERSION_NUMBER >= 0x030000
	299	gnutls_datum_t uri;
9e4dddbd JH	300	int ret;
	301	uschar sep = '\n';
	302	int index;
	303	uschar * list = NULL;
	304
	305	if (mod)
	306	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef	307
9e4dddbd JH	308	for(index = 0;; index++)
	309	{
	310	ret = gnutls_x509_crt_get_authority_info_access((gnutls_x509_crt_t)cert,
	311	index, GNUTLS_IA_OCSP_URI, &uri, NULL);
9d1c15ef	312
9e4dddbd JH	313	if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
	314	return list;
	315	if (ret < 0)
8a6eec04	316	return g_err("gai", __FUNCTION__, ret);
9d1c15ef	317
9e4dddbd JH	318	list = string_append_listele(list, sep,
	319	string_copyn(uri.data, uri.size));
	320	}
	321	/NOTREACHED/
9d1c15ef JH	322
	323	#else
	324
	325	expand_string_message =
	326	string_sprintf("%s: OCSP support with GnuTLS requires version 3.0.0\n",
	327	__FUNCTION__);
	328	return NULL;
	329
	330	#endif
	331	}
	332
	333	uschar *
9e4dddbd	334	tls_cert_crl_uri(void * cert, uschar * mod)
9d1c15ef JH	335	{
9d1c15ef JH	336	int ret;
9e4dddbd JH	337	size_t siz;
	338	uschar sep = '\n';
	339	int index;
	340	uschar * list = NULL;
	341	uschar * ele;
	342
	343	if (mod)
	344	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef	345
9e4dddbd	346	for(index = 0;; index++)
9d1c15ef	347	{
9e4dddbd JH	348	siz = 0;
	349	switch(ret = gnutls_x509_crt_get_crl_dist_points(
	350	(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL, NULL))
	351	{
	352	case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
	353	return list;
	354	case GNUTLS_E_SHORT_MEMORY_BUFFER:
	355	break;
	356	default:
8a6eec04	357	return g_err("gc0", __FUNCTION__, ret);
9e4dddbd JH	358	}
	359
	360	ele = store_get(siz+1);
	361	if ((ret = gnutls_x509_crt_get_crl_dist_points(
8a6eec04 JH	362	(gnutls_x509_crt_t)cert, index, ele, &siz, NULL, NULL)) < 0)
	363	return g_err("gc1", __FUNCTION__, ret);
	364
9e4dddbd JH	365	ele[siz] = '\0';
9e4dddbd JH	366	list = string_append_listele(list, sep, ele);
9d1c15ef	367	}
9e4dddbd	368	/NOTREACHED/
9d1c15ef JH	369	}
	370
	371
6a8a60e0 JH	372	/*****************************************************
	373	* Certificate operator routines
	374	*****************************************************/
	375	static uschar *
	376	fingerprint(gnutls_x509_crt_t cert, gnutls_digest_algorithm_t algo)
	377	{
	378	int ret;
	379	size_t siz = 0;
	380	uschar * cp;
	381	uschar * cp2;
	382	uschar * cp3;
	383
	384	if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, NULL, &siz))
	385	!= GNUTLS_E_SHORT_MEMORY_BUFFER)
8a6eec04 JH	386	return g_err("gf0", __FUNCTION__, ret);
8a6eec04 JH	387
6a8a60e0 JH	388	cp = store_get(siz*3+1);
6a8a60e0 JH	389	if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, cp, &siz)) < 0)
8a6eec04 JH	390	return g_err("gf1", __FUNCTION__, ret);
8a6eec04 JH	391
6a8a60e0 JH	392	for (cp3 = cp2 = cp+siz; cp < cp2; cp++, cp3+=2)
	393	sprintf(cp3, "%02X",*cp);
	394	return cp2;
	395	}
	396
	397
	398	uschar *
	399	tls_cert_fprt_md5(void * cert)
	400	{
	401	return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_MD5);
	402	}
	403
	404	uschar *
	405	tls_cert_fprt_sha1(void * cert)
	406	{
	407	return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_SHA1);
	408	}
	409
9ef9101c JH	410	uschar *
	411	tls_cert_fprt_sha256(void * cert)
	412	{
	413	return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_SHA256);
	414	}
	415
6a8a60e0	416
9d1c15ef JH	417	/* vi: aw ai sw=2
	418	*/
	419	/* End of tlscert-gnu.c */