[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(stderr,
  "%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 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)
{
uschar * cp = NULL;
int ret;
size_t siz = 0;

ret = gnutls_x509_crt_get_dn(cert, cp, &siz);
if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
  {
  fprintf(stderr, "%s: gs0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
  return NULL;
  }

cp = store_get(siz);

ret = gnutls_x509_crt_get_dn(cert, cp, &siz);
if (ret < 0)
  {
  fprintf(stderr, "%s: gs1 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
  return NULL;
  }

return 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	{
	80	expand_string_message = string_sprintf(stderr,
	81	"%s: %s fail: %s\n", from, tag, gnutls_strerror(gnutls_err));
	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 JH	99	{
	100	uschar txt[256];
	101	size_t sz = sizeof(txt);
	102	return ( gnutls_x509_crt_get_issuer_dn(cert, CS txt, &sz) == 0 )
	103	? string_copy(txt) : NULL;
	104	}
	105
	106	uschar *
9e4dddbd	107	tls_cert_not_after(void * cert, uschar * mod)
9d1c15ef JH	108	{
	109	return time_copy(
	110	gnutls_x509_crt_get_expiration_time((gnutls_x509_crt_t)cert));
	111	}
	112
	113	uschar *
9e4dddbd	114	tls_cert_not_before(void * cert, uschar * mod)
9d1c15ef JH	115	{
	116	return time_copy(
	117	gnutls_x509_crt_get_activation_time((gnutls_x509_crt_t)cert));
	118	}
	119
	120	uschar *
9e4dddbd	121	tls_cert_serial_number(void * cert, uschar * mod)
9d1c15ef JH	122	{
	123	uschar bin[50], txt[150];
	124	size_t sz = sizeof(bin);
	125	uschar * sp;
	126	uschar * dp;
	127
	128	if (gnutls_x509_crt_get_serial((gnutls_x509_crt_t)cert,
	129	bin, &sz) \|\| sz > sizeof(bin))
	130	return NULL;
	131	for(dp = txt, sp = bin; sz; dp += 2, sp++, sz--)
	132	sprintf(dp, "%.2x", *sp);
	133	for(sp = txt; sp[0]=='0' && sp[1]; ) sp++; /* leading zeroes */
	134	return string_copy(sp);
	135	}
	136
	137	uschar *
9e4dddbd	138	tls_cert_signature(void * cert, uschar * mod)
9d1c15ef JH	139	{
	140	uschar * cp1;
	141	uschar * cp2;
	142	uschar * cp3;
	143	size_t len = 0;
	144	int ret;
	145
	146	if ((ret = gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len)) !=
	147	GNUTLS_E_SHORT_MEMORY_BUFFER)
	148	{
	149	fprintf(stderr, "%s: gs0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
	150	return NULL;
	151	}
	152
	153	cp1 = store_get(len*4+1);
	154
	155	if (gnutls_x509_crt_get_signature((gnutls_x509_crt_t)cert, cp1, &len) != 0)
	156	{
	157	fprintf(stderr, "%s: gs1 fail\n", __FUNCTION__);
	158	return NULL;
	159	}
	160
	161	for(cp3 = cp2 = cp1+len; cp1 < cp2; cp3 += 3, cp1++)
	162	sprintf(cp3, "%.2x ", *cp1);
	163	cp3[-1]= '\0';
	164
	165	return cp2;
	166	}
	167
	168	uschar *
9e4dddbd	169	tls_cert_signature_algorithm(void * cert, uschar * mod)
9d1c15ef JH	170	{
	171	gnutls_sign_algorithm_t algo =
	172	gnutls_x509_crt_get_signature_algorithm((gnutls_x509_crt_t)cert);
	173	return algo < 0 ? NULL : string_copy(gnutls_sign_get_name(algo));
	174	}
	175
	176	uschar *
9e4dddbd	177	tls_cert_subject(void * cert, uschar * mod)
9d1c15ef	178	{
8a6eec04 JH	179	uschar * cp = NULL;
	180	int ret;
	181	size_t siz = 0;
	182
	183	ret = gnutls_x509_crt_get_dn(cert, cp, &siz);
	184	if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
	185	{
	186	fprintf(stderr, "%s: gs0 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
	187	return NULL;
	188	}
	189
	190	cp = store_get(siz);
	191
	192	ret = gnutls_x509_crt_get_dn(cert, cp, &siz);
	193	if (ret < 0)
	194	{
	195	fprintf(stderr, "%s: gs1 fail: %s\n", __FUNCTION__, gnutls_strerror(ret));
	196	return NULL;
	197	}
	198
	199	return cp;
9d1c15ef JH	200	}
	201
	202	uschar *
9e4dddbd	203	tls_cert_version(void * cert, uschar * mod)
9d1c15ef JH	204	{
	205	return string_sprintf("%d", gnutls_x509_crt_get_version(cert));
	206	}
	207
	208	uschar *
	209	tls_cert_ext_by_oid(void * cert, uschar * oid, int idx)
	210	{
	211	uschar * cp1 = NULL;
	212	uschar * cp2;
	213	uschar * cp3;
	214	size_t siz = 0;
	215	unsigned int crit;
	216	int ret;
	217
	218	ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
	219	oid, idx, cp1, &siz, &crit);
	220	if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
8a6eec04	221	return g_err("ge0", __FUNCTION__, ret);
9d1c15ef JH	222
	223	cp1 = store_get(siz*4 + 1);
	224
	225	ret = gnutls_x509_crt_get_extension_by_oid ((gnutls_x509_crt_t)cert,
	226	oid, idx, cp1, &siz, &crit);
	227	if (ret < 0)
8a6eec04	228	return g_err("ge1", __FUNCTION__, ret);
9d1c15ef JH	229
	230	/* binary data, DER encoded */
	231
	232	/* just dump for now */
	233	for(cp3 = cp2 = cp1+siz; cp1 < cp2; cp3 += 3, cp1++)
	234	sprintf(cp3, "%.2x ", *cp1);
	235	cp3[-1]= '\0';
	236
	237	return cp2;
	238	}
	239
	240	uschar *
9e4dddbd	241	tls_cert_subject_altname(void * cert, uschar * mod)
9d1c15ef	242	{
9e4dddbd JH	243	uschar * list = NULL;
	244	int index;
	245	size_t siz;
9d1c15ef	246	int ret;
9e4dddbd JH	247	uschar sep = '\n';
	248	uschar * tag = US"";
	249	uschar * ele;
	250	int match = -1;
9d1c15ef	251
9e4dddbd	252	while (mod)
9d1c15ef	253	{
9e4dddbd JH	254	if (mod == '>' && ++mod) sep = *mod++;
	255	else if (Ustrcmp(mod, "dns")==0) { match = GNUTLS_SAN_DNSNAME; mod += 3; }
	256	else if (Ustrcmp(mod, "uri")==0) { match = GNUTLS_SAN_URI; mod += 3; }
	257	else if (Ustrcmp(mod, "mail")==0) { match = GNUTLS_SAN_RFC822NAME; mod += 4; }
	258	else continue;
	259
	260	if (*mod++ != ',')
9d1c15ef	261	break;
9d1c15ef JH	262	}
9d1c15ef JH	263
9e4dddbd	264	for(index = 0;; index++)
9d1c15ef	265	{
9e4dddbd JH	266	siz = 0;
	267	switch(ret = gnutls_x509_crt_get_subject_alt_name(
	268	(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL))
	269	{
	270	case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
	271	return list; /* no more elements; normal exit */
	272
	273	case GNUTLS_E_SHORT_MEMORY_BUFFER:
	274	break;
	275
	276	default:
8a6eec04	277	return g_err("gs0", __FUNCTION__, ret);
9e4dddbd JH	278	}
	279
	280	ele = store_get(siz+1);
	281	if ((ret = gnutls_x509_crt_get_subject_alt_name(
	282	(gnutls_x509_crt_t)cert, index, ele, &siz, NULL)) < 0)
8a6eec04	283	return g_err("gs1", __FUNCTION__, ret);
9e4dddbd JH	284	ele[siz] = '\0';
	285
	286	if (match != -1 && match != ret)
	287	continue;
	288	switch (ret)
	289	{
	290	case GNUTLS_SAN_DNSNAME: tag = US"DNS"; break;
	291	case GNUTLS_SAN_URI: tag = US"URI"; break;
	292	case GNUTLS_SAN_RFC822NAME: tag = US"MAIL"; break;
	293	default: continue; /* ignore unrecognised types */
	294	}
	295	list = string_append_listele(list, sep,
	296	match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
9d1c15ef	297	}
9e4dddbd	298	/NOTREACHED/
9d1c15ef JH	299	}
	300
	301	uschar *
9e4dddbd	302	tls_cert_ocsp_uri(void * cert, uschar * mod)
9d1c15ef JH	303	{
	304	#if GNUTLS_VERSION_NUMBER >= 0x030000
	305	gnutls_datum_t uri;
9e4dddbd JH	306	int ret;
	307	uschar sep = '\n';
	308	int index;
	309	uschar * list = NULL;
	310
	311	if (mod)
	312	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef	313
9e4dddbd JH	314	for(index = 0;; index++)
	315	{
	316	ret = gnutls_x509_crt_get_authority_info_access((gnutls_x509_crt_t)cert,
	317	index, GNUTLS_IA_OCSP_URI, &uri, NULL);
9d1c15ef	318
9e4dddbd JH	319	if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
	320	return list;
	321	if (ret < 0)
8a6eec04	322	return g_err("gai", __FUNCTION__, ret);
9d1c15ef	323
9e4dddbd JH	324	list = string_append_listele(list, sep,
	325	string_copyn(uri.data, uri.size));
	326	}
	327	/NOTREACHED/
9d1c15ef JH	328
	329	#else
	330
	331	expand_string_message =
	332	string_sprintf("%s: OCSP support with GnuTLS requires version 3.0.0\n",
	333	__FUNCTION__);
	334	return NULL;
	335
	336	#endif
	337	}
	338
	339	uschar *
9e4dddbd	340	tls_cert_crl_uri(void * cert, uschar * mod)
9d1c15ef JH	341	{
9d1c15ef JH	342	int ret;
9e4dddbd JH	343	size_t siz;
	344	uschar sep = '\n';
	345	int index;
	346	uschar * list = NULL;
	347	uschar * ele;
	348
	349	if (mod)
	350	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef	351
9e4dddbd	352	for(index = 0;; index++)
9d1c15ef	353	{
9e4dddbd JH	354	siz = 0;
	355	switch(ret = gnutls_x509_crt_get_crl_dist_points(
	356	(gnutls_x509_crt_t)cert, index, NULL, &siz, NULL, NULL))
	357	{
	358	case GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE:
	359	return list;
	360	case GNUTLS_E_SHORT_MEMORY_BUFFER:
	361	break;
	362	default:
8a6eec04	363	return g_err("gc0", __FUNCTION__, ret);
9e4dddbd JH	364	}
	365
	366	ele = store_get(siz+1);
	367	if ((ret = gnutls_x509_crt_get_crl_dist_points(
8a6eec04 JH	368	(gnutls_x509_crt_t)cert, index, ele, &siz, NULL, NULL)) < 0)
	369	return g_err("gc1", __FUNCTION__, ret);
	370
9e4dddbd JH	371	ele[siz] = '\0';
9e4dddbd JH	372	list = string_append_listele(list, sep, ele);
9d1c15ef	373	}
9e4dddbd	374	/NOTREACHED/
9d1c15ef JH	375	}
	376
	377
6a8a60e0 JH	378	/*****************************************************
	379	* Certificate operator routines
	380	*****************************************************/
	381	static uschar *
	382	fingerprint(gnutls_x509_crt_t cert, gnutls_digest_algorithm_t algo)
	383	{
	384	int ret;
	385	size_t siz = 0;
	386	uschar * cp;
	387	uschar * cp2;
	388	uschar * cp3;
	389
	390	if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, NULL, &siz))
	391	!= GNUTLS_E_SHORT_MEMORY_BUFFER)
8a6eec04 JH	392	return g_err("gf0", __FUNCTION__, ret);
8a6eec04 JH	393
6a8a60e0 JH	394	cp = store_get(siz*3+1);
6a8a60e0 JH	395	if ((ret = gnutls_x509_crt_get_fingerprint(cert, algo, cp, &siz)) < 0)
8a6eec04 JH	396	return g_err("gf1", __FUNCTION__, ret);
8a6eec04 JH	397
6a8a60e0 JH	398	for (cp3 = cp2 = cp+siz; cp < cp2; cp++, cp3+=2)
	399	sprintf(cp3, "%02X",*cp);
	400	return cp2;
	401	}
	402
	403
	404	uschar *
	405	tls_cert_fprt_md5(void * cert)
	406	{
	407	return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_MD5);
	408	}
	409
	410	uschar *
	411	tls_cert_fprt_sha1(void * cert)
	412	{
	413	return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_SHA1);
	414	}
	415
9ef9101c JH	416	uschar *
	417	tls_cert_fprt_sha256(void * cert)
	418	{
	419	return fingerprint((gnutls_x509_crt_t)cert, GNUTLS_DIG_SHA256);
	420	}
	421
6a8a60e0	422
9d1c15ef JH	423	/* vi: aw ai sw=2
	424	*/
	425	/* End of tlscert-gnu.c */