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

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

/* Copyright (c) Jeremy Harris 2014 */

/* This module provides TLS (aka SSL) support for Exim using the OpenSSL
library. It is #included into the tls.c file when that library is used.
*/


/* Heading stuff */

#include <openssl/lhash.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/x509v3.h>


/*****************************************************
*  Export/import a certificate, binary/printable
*****************************************************/
int
tls_export_cert(uschar * buf, size_t buflen, void * cert)
{
BIO * bp = BIO_new(BIO_s_mem());
int fail;

if ((fail = PEM_write_bio_X509(bp, (X509 *)cert) ? 0 : 1))
  log_write(0, LOG_MAIN, "TLS error in certificate export: %s",
    ERR_error_string(ERR_get_error(), NULL));
else
  {
  char * cp = CS buf;
  int n;
  buflen -= 2;
  for(;;)
    {
    if ((n = BIO_gets(bp, cp, (int)buflen)) <= 0) break;
    cp += n+1;
    buflen -= n+1;
    cp[-2] = '\\'; cp[-1] = 'n'; /* newline->"\n" */
    }				 /* compat with string_printing() */
  *cp = '\0';
  }

BIO_free(bp);
return fail;
}

int
tls_import_cert(const uschar * buf, void ** cert)
{
void * reset_point = store_get(0);
const uschar * cp = string_unprinting(US buf);
BIO * bp;
X509 * x;

bp = BIO_new_mem_buf(US cp, -1);
x = PEM_read_bio_X509(bp, NULL, 0, NULL);
int fail = 0;
if (!x)
  fail = 1;
else
  *cert = (void *)x;
BIO_free(bp);
store_reset(reset_point);
return fail;
}

void
tls_free_cert(void * cert)
{
X509_free((X509 *)cert);
}

/*****************************************************
*  Certificate field extraction routines
*****************************************************/
static uschar *
bio_string_copy(BIO * bp, int len)
{
uschar * cp = US"";
len = len > 0 ? (int) BIO_get_mem_data(bp, &cp) : 0;
cp = string_copyn(cp, len);
BIO_free(bp);
return cp;
}

static uschar *
bio_string_time_to_int(BIO * bp, int len)
{
uschar * cp = US"";
struct tm t;
len = len > 0 ? (int) BIO_get_mem_data(bp, &cp) : 0;
/*XXX %Z might be glibc-specific? */
(void) strptime(CS cp, "%b%t%e%t%T%t%Y%t%Z", &t);
BIO_free(bp);
/*XXX timegm might not be portable? */
return string_sprintf("%u", (unsigned) timegm(&t));
}

static uschar *
asn1_time_copy(const ASN1_TIME * time, uschar * mod)
{
BIO * bp = BIO_new(BIO_s_mem());
int len = ASN1_TIME_print(bp, time);
return mod &&  Ustrcmp(mod, "int") == 0
  ? bio_string_time_to_int(bp, len)
  : bio_string_copy(bp, len);
}

static uschar *
x509_name_copy(X509_NAME * name)
{
BIO * bp = BIO_new(BIO_s_mem());
int len_good =
  X509_NAME_print_ex(bp, name, 0, XN_FLAG_RFC2253) >= 0
  ? 1 : 0;
return bio_string_copy(bp, len_good);
}

/**/

uschar *
tls_cert_issuer(void * cert, uschar * mod)
{
uschar * cp = x509_name_copy(X509_get_issuer_name((X509 *)cert));
return mod ? tls_field_from_dn(cp, mod) : cp;
}

uschar *
tls_cert_not_before(void * cert, uschar * mod)
{
return asn1_time_copy(X509_get_notBefore((X509 *)cert), mod);
}

uschar *
tls_cert_not_after(void * cert, uschar * mod)
{
return asn1_time_copy(X509_get_notAfter((X509 *)cert), mod);
}

uschar *
tls_cert_serial_number(void * cert, uschar * mod)
{
uschar txt[256];
BIO * bp = BIO_new(BIO_s_mem());
int len = i2a_ASN1_INTEGER(bp, X509_get_serialNumber((X509 *)cert));

if (len < sizeof(txt))
  BIO_read(bp, txt, len);
else
  len = 0;
BIO_free(bp);
return string_copynlc(txt, len);	/* lowercase */
}

uschar *
tls_cert_signature(void * cert, uschar * mod)
{
BIO * bp = BIO_new(BIO_s_mem());
uschar * cp = NULL;

if (X509_print_ex(bp, (X509 *)cert, 0,
  X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL | 
  X509_FLAG_NO_SIGNAME | X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY | 
  X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS | 
  /* X509_FLAG_NO_SIGDUMP is the missing one */
  X509_FLAG_NO_AUX) == 1)
  {
  long len = BIO_get_mem_data(bp, &cp);
  cp = string_copyn(cp, len);
  }
BIO_free(bp);
return cp;
}

uschar *
tls_cert_signature_algorithm(void * cert, uschar * mod)
{
return string_copy(US OBJ_nid2ln(X509_get_signature_type((X509 *)cert)));
}

uschar *
tls_cert_subject(void * cert, uschar * mod)
{
uschar * cp = x509_name_copy(X509_get_subject_name((X509 *)cert));
return mod ? tls_field_from_dn(cp, mod) : cp;
}

uschar *
tls_cert_version(void * cert, uschar * mod)
{
return string_sprintf("%d", X509_get_version((X509 *)cert));
}

uschar *
tls_cert_ext_by_oid(void * cert, uschar * oid, int idx)
{
int nid = OBJ_create(CS oid, "", "");
int nidx = X509_get_ext_by_NID((X509 *)cert, nid, idx);
X509_EXTENSION * ex = X509_get_ext((X509 *)cert, nidx);
ASN1_OCTET_STRING * adata = X509_EXTENSION_get_data(ex);
BIO * bp = BIO_new(BIO_s_mem());
long len;
uschar * cp1;
uschar * cp2;
uschar * cp3;

M_ASN1_OCTET_STRING_print(bp, adata);
/* binary data, DER encoded */

/* just dump for now */
len = BIO_get_mem_data(bp, &cp1);
cp3 = cp2 = store_get(len*3+1);

while(len)
  {
  sprintf(CS cp2, "%.2x ", *cp1++);
  cp2 += 3;
  len--;
  }
cp2[-1] = '\0';

return cp3;
}

uschar *
tls_cert_subject_altname(void * cert, uschar * mod)
{
uschar * list = NULL;
STACK_OF(GENERAL_NAME) * san = (STACK_OF(GENERAL_NAME) *)
  X509_get_ext_d2i((X509 *)cert, NID_subject_alt_name, NULL, NULL);
uschar sep = '\n';
uschar * tag = US"";
uschar * ele;
int match = -1;
int len;

if (!san) return NULL;

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

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

while (sk_GENERAL_NAME_num(san) > 0)
  {
  GENERAL_NAME * namePart = sk_GENERAL_NAME_pop(san);
  if (match != -1 && match != namePart->type)
    continue;
  switch (namePart->type)
    {
    case GEN_DNS:
      tag = US"DNS";
      ele = ASN1_STRING_data(namePart->d.dNSName);
      len = ASN1_STRING_length(namePart->d.dNSName);
      break;
    case GEN_URI:
      tag = US"URI";
      ele = ASN1_STRING_data(namePart->d.uniformResourceIdentifier);
      len = ASN1_STRING_length(namePart->d.uniformResourceIdentifier);
      break;
    case GEN_EMAIL:
      tag = US"MAIL";
      ele = ASN1_STRING_data(namePart->d.rfc822Name);
      len = ASN1_STRING_length(namePart->d.rfc822Name);
      break;
    default:
      continue;	/* ignore unrecognised types */
    }
  if (ele[len])	/* not nul-terminated */
    ele = string_copyn(ele, len);

  if (strnlen(CS ele, len) == len)	/* ignore any with embedded nul */
    list = string_append_listele(list, sep,
	  match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
  }

sk_GENERAL_NAME_free(san);
return list;
}

uschar *
tls_cert_ocsp_uri(void * cert, uschar * mod)
{
STACK_OF(ACCESS_DESCRIPTION) * ads = (STACK_OF(ACCESS_DESCRIPTION) *)
  X509_get_ext_d2i((X509 *)cert, NID_info_access, NULL, NULL);
int adsnum = sk_ACCESS_DESCRIPTION_num(ads);
int i;
uschar sep = '\n';
uschar * list = NULL;

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

for (i = 0; i < adsnum; i++)
  {
  ACCESS_DESCRIPTION * ad = sk_ACCESS_DESCRIPTION_value(ads, i);

  if (ad && OBJ_obj2nid(ad->method) == NID_ad_OCSP)
    list = string_append_listele(list, sep,
	      ASN1_STRING_data(ad->location->d.ia5));
  }
return list;
}

uschar *
tls_cert_crl_uri(void * cert, uschar * mod)
{
STACK_OF(DIST_POINT) * dps = (STACK_OF(DIST_POINT) *)
  X509_get_ext_d2i((X509 *)cert,  NID_crl_distribution_points,
    NULL, NULL);
DIST_POINT * dp;
int dpsnum = sk_DIST_POINT_num(dps);
int i;
uschar sep = '\n';
uschar * list = NULL;

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

if (dps) for (i = 0; i < dpsnum; i++)
  if ((dp = sk_DIST_POINT_value(dps, i)))
    {
    STACK_OF(GENERAL_NAME) * names = dp->distpoint->name.fullname;
    GENERAL_NAME * np;
    int nnum = sk_GENERAL_NAME_num(names);
    int j;

    for (j = 0; j < nnum; j++)
      if (  (np = sk_GENERAL_NAME_value(names, j))
	 && np->type == GEN_URI
	 )
	list = string_append_listele(list, sep,
		ASN1_STRING_data(np->d.uniformResourceIdentifier));
    }
return list;
}


/*****************************************************
*  Certificate operator routines
*****************************************************/
static uschar *
fingerprint(X509 * cert, const EVP_MD * fdig)
{
int j;
unsigned int n;
uschar md[EVP_MAX_MD_SIZE];
uschar * cp;

if (!X509_digest(cert,fdig,md,&n))
  {
  expand_string_message = US"tls_cert_fprt: out of mem\n";
  return NULL;
  }
cp = store_get(n*2+1);
for (j = 0; j < (int)n; j++) sprintf(CS cp+2*j, "%02X", md[j]);
return(cp);
}

uschar * 
tls_cert_fprt_md5(void * cert)
{
return fingerprint((X509 *)cert, EVP_md5());
}

uschar * 
tls_cert_fprt_sha1(void * cert)
{
return fingerprint((X509 *)cert, EVP_sha1());
}

uschar * 
tls_cert_fprt_sha256(void * cert)
{
return fingerprint((X509 *)cert, EVP_sha256());
}


/* vi: aw ai sw=2
*/
/* End of tlscert-openssl.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 module provides TLS (aka SSL) support for Exim using the OpenSSL
	8	library. It is #included into the tls.c file when that library is used.
	9	*/
	10
	11
	12	/* Heading stuff */
	13
	14	#include <openssl/lhash.h>
	15	#include <openssl/ssl.h>
	16	#include <openssl/err.h>
	17	#include <openssl/rand.h>
51424d08	18	#include <openssl/x509v3.h>
9d1c15ef JH	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	BIO * bp = BIO_new(BIO_s_mem());
	28	int fail;
	29
	30	if ((fail = PEM_write_bio_X509(bp, (X509 *)cert) ? 0 : 1))
	31	log_write(0, LOG_MAIN, "TLS error in certificate export: %s",
	32	ERR_error_string(ERR_get_error(), NULL));
	33	else
	34	{
	35	char * cp = CS buf;
	36	int n;
	37	buflen -= 2;
	38	for(;;)
	39	{
	40	if ((n = BIO_gets(bp, cp, (int)buflen)) <= 0) break;
	41	cp += n+1;
	42	buflen -= n+1;
	43	cp[-2] = '\\'; cp[-1] = 'n'; /* newline->"\n" */
	44	} /* compat with string_printing() */
	45	*cp = '\0';
	46	}
	47
	48	BIO_free(bp);
	49	return fail;
	50	}
	51
	52	int
	53	tls_import_cert(const uschar * buf, void ** cert)
	54	{
	55	void * reset_point = store_get(0);
	56	const uschar * cp = string_unprinting(US buf);
	57	BIO * bp;
	58	X509 * x;
	59
	60	bp = BIO_new_mem_buf(US cp, -1);
	61	x = PEM_read_bio_X509(bp, NULL, 0, NULL);
	62	int fail = 0;
	63	if (!x)
	64	fail = 1;
	65	else
	66	cert = (void )x;
	67	BIO_free(bp);
	68	store_reset(reset_point);
	69	return fail;
	70	}
	71
	72	void
	73	tls_free_cert(void * cert)
	74	{
	75	X509_free((X509 *)cert);
	76	}
	77
	78	/*****************************************************
	79	* Certificate field extraction routines
	80	*****************************************************/
	81	static uschar *
	82	bio_string_copy(BIO * bp, int len)
83	{
e3dd1d67	84	uschar * cp = US"";
9d1c15ef JH	85	len = len > 0 ? (int) BIO_get_mem_data(bp, &cp) : 0;
	86	cp = string_copyn(cp, len);
	87	BIO_free(bp);
	88	return cp;
	89	}
	90
	91	static uschar *
25ba2544 JH	92	bio_string_time_to_int(BIO * bp, int len)
	93	{
	94	uschar * cp = US"";
	95	struct tm t;
	96	len = len > 0 ? (int) BIO_get_mem_data(bp, &cp) : 0;
	97	/XXX %Z might be glibc-specific? /
	98	(void) strptime(CS cp, "%b%t%e%t%T%t%Y%t%Z", &t);
	99	BIO_free(bp);
	100	/XXX timegm might not be portable? /
	101	return string_sprintf("%u", (unsigned) timegm(&t));
	102	}
	103
	104	static uschar *
	105	asn1_time_copy(const ASN1_TIME * time, uschar * mod)
9d1c15ef JH	106	{
	107	BIO * bp = BIO_new(BIO_s_mem());
	108	int len = ASN1_TIME_print(bp, time);
25ba2544 JH	109	return mod && Ustrcmp(mod, "int") == 0
	110	? bio_string_time_to_int(bp, len)
	111	: bio_string_copy(bp, len);
9d1c15ef JH	112	}
	113
	114	static uschar *
	115	x509_name_copy(X509_NAME * name)
	116	{
	117	BIO * bp = BIO_new(BIO_s_mem());
	118	int len_good =
	119	X509_NAME_print_ex(bp, name, 0, XN_FLAG_RFC2253) >= 0
	120	? 1 : 0;
	121	return bio_string_copy(bp, len_good);
	122	}
	123
	124	/**/
	125
	126	uschar *
9e4dddbd	127	tls_cert_issuer(void * cert, uschar * mod)
9d1c15ef	128	{
812a6045 JH	129	uschar * cp = x509_name_copy(X509_get_issuer_name((X509 *)cert));
812a6045 JH	130	return mod ? tls_field_from_dn(cp, mod) : cp;
9d1c15ef JH	131	}
	132
	133	uschar *
9e4dddbd	134	tls_cert_not_before(void * cert, uschar * mod)
9d1c15ef	135	{
25ba2544	136	return asn1_time_copy(X509_get_notBefore((X509 *)cert), mod);
9d1c15ef JH	137	}
	138
	139	uschar *
9e4dddbd	140	tls_cert_not_after(void * cert, uschar * mod)
9d1c15ef	141	{
25ba2544	142	return asn1_time_copy(X509_get_notAfter((X509 *)cert), mod);
9d1c15ef JH	143	}
	144
	145	uschar *
9e4dddbd	146	tls_cert_serial_number(void * cert, uschar * mod)
9d1c15ef JH	147	{
	148	uschar txt[256];
	149	BIO * bp = BIO_new(BIO_s_mem());
	150	int len = i2a_ASN1_INTEGER(bp, X509_get_serialNumber((X509 *)cert));
	151
	152	if (len < sizeof(txt))
	153	BIO_read(bp, txt, len);
	154	else
	155	len = 0;
	156	BIO_free(bp);
	157	return string_copynlc(txt, len); /* lowercase */
	158	}
	159
	160	uschar *
9e4dddbd	161	tls_cert_signature(void * cert, uschar * mod)
9d1c15ef JH	162	{
	163	BIO * bp = BIO_new(BIO_s_mem());
	164	uschar * cp = NULL;
	165
	166	if (X509_print_ex(bp, (X509 *)cert, 0,
	167	X509_FLAG_NO_HEADER \| X509_FLAG_NO_VERSION \| X509_FLAG_NO_SERIAL \|
	168	X509_FLAG_NO_SIGNAME \| X509_FLAG_NO_ISSUER \| X509_FLAG_NO_VALIDITY \|
	169	X509_FLAG_NO_SUBJECT \| X509_FLAG_NO_PUBKEY \| X509_FLAG_NO_EXTENSIONS \|
	170	/* X509_FLAG_NO_SIGDUMP is the missing one */
	171	X509_FLAG_NO_AUX) == 1)
	172	{
	173	long len = BIO_get_mem_data(bp, &cp);
	174	cp = string_copyn(cp, len);
	175	}
	176	BIO_free(bp);
	177	return cp;
	178	}
	179
	180	uschar *
9e4dddbd	181	tls_cert_signature_algorithm(void * cert, uschar * mod)
9d1c15ef	182	{
e3dd1d67	183	return string_copy(US OBJ_nid2ln(X509_get_signature_type((X509 *)cert)));
9d1c15ef JH	184	}
	185
	186	uschar *
9e4dddbd	187	tls_cert_subject(void * cert, uschar * mod)
9d1c15ef	188	{
812a6045 JH	189	uschar * cp = x509_name_copy(X509_get_subject_name((X509 *)cert));
812a6045 JH	190	return mod ? tls_field_from_dn(cp, mod) : cp;
9d1c15ef JH	191	}
	192
	193	uschar *
9e4dddbd	194	tls_cert_version(void * cert, uschar * mod)
9d1c15ef JH	195	{
	196	return string_sprintf("%d", X509_get_version((X509 *)cert));
	197	}
	198
	199	uschar *
	200	tls_cert_ext_by_oid(void * cert, uschar * oid, int idx)
	201	{
e3dd1d67	202	int nid = OBJ_create(CS oid, "", "");
9d1c15ef JH	203	int nidx = X509_get_ext_by_NID((X509 *)cert, nid, idx);
	204	X509_EXTENSION * ex = X509_get_ext((X509 *)cert, nidx);
	205	ASN1_OCTET_STRING * adata = X509_EXTENSION_get_data(ex);
	206	BIO * bp = BIO_new(BIO_s_mem());
	207	long len;
	208	uschar * cp1;
	209	uschar * cp2;
	210	uschar * cp3;
	211
	212	M_ASN1_OCTET_STRING_print(bp, adata);
	213	/* binary data, DER encoded */
	214
	215	/* just dump for now */
	216	len = BIO_get_mem_data(bp, &cp1);
	217	cp3 = cp2 = store_get(len*3+1);
	218
	219	while(len)
	220	{
e3dd1d67	221	sprintf(CS cp2, "%.2x ", *cp1++);
9d1c15ef JH	222	cp2 += 3;
	223	len--;
	224	}
	225	cp2[-1] = '\0';
	226
	227	return cp3;
	228	}
	229
	230	uschar *
9e4dddbd	231	tls_cert_subject_altname(void * cert, uschar * mod)
9d1c15ef	232	{
9e4dddbd	233	uschar * list = NULL;
9d1c15ef JH	234	STACK_OF(GENERAL_NAME) * san = (STACK_OF(GENERAL_NAME) *)
9d1c15ef JH	235	X509_get_ext_d2i((X509 *)cert, NID_subject_alt_name, NULL, NULL);
9e4dddbd JH	236	uschar sep = '\n';
	237	uschar * tag = US"";
	238	uschar * ele;
	239	int match = -1;
e51c7be2	240	int len;
9d1c15ef JH	241
	242	if (!san) return NULL;
	243
9e4dddbd JH	244	while (mod)
	245	{
	246	if (mod == '>' && ++mod) sep = *mod++;
	247	else if (Ustrcmp(mod, "dns")==0) { match = GEN_DNS; mod += 3; }
	248	else if (Ustrcmp(mod, "uri")==0) { match = GEN_URI; mod += 3; }
	249	else if (Ustrcmp(mod, "mail")==0) { match = GEN_EMAIL; mod += 4; }
	250	else continue;
	251
	252	if (*mod++ != ',')
	253	break;
	254	}
	255
9d1c15ef JH	256	while (sk_GENERAL_NAME_num(san) > 0)
	257	{
	258	GENERAL_NAME * namePart = sk_GENERAL_NAME_pop(san);
9e4dddbd JH	259	if (match != -1 && match != namePart->type)
9e4dddbd JH	260	continue;
9d1c15ef JH	261	switch (namePart->type)
9d1c15ef JH	262	{
9e4dddbd JH	263	case GEN_DNS:
	264	tag = US"DNS";
	265	ele = ASN1_STRING_data(namePart->d.dNSName);
e51c7be2	266	len = ASN1_STRING_length(namePart->d.dNSName);
9e4dddbd	267	break;
9d1c15ef	268	case GEN_URI:
9e4dddbd JH	269	tag = US"URI";
9e4dddbd JH	270	ele = ASN1_STRING_data(namePart->d.uniformResourceIdentifier);
e51c7be2	271	len = ASN1_STRING_length(namePart->d.uniformResourceIdentifier);
9e4dddbd	272	break;
9d1c15ef	273	case GEN_EMAIL:
9e4dddbd JH	274	tag = US"MAIL";
9e4dddbd JH	275	ele = ASN1_STRING_data(namePart->d.rfc822Name);
e51c7be2	276	len = ASN1_STRING_length(namePart->d.rfc822Name);
9e4dddbd	277	break;
9d1c15ef	278	default:
9e4dddbd	279	continue; /* ignore unrecognised types */
9d1c15ef	280	}
e51c7be2 JH	281	if (ele[len]) /* not nul-terminated */
	282	ele = string_copyn(ele, len);
	283
	284	if (strnlen(CS ele, len) == len) /* ignore any with embedded nul */
	285	list = string_append_listele(list, sep,
9e4dddbd	286	match == -1 ? string_sprintf("%s=%s", tag, ele) : ele);
9d1c15ef JH	287	}
9d1c15ef JH	288
9e4dddbd JH	289	sk_GENERAL_NAME_free(san);
9e4dddbd JH	290	return list;
9d1c15ef JH	291	}
	292
	293	uschar *
9e4dddbd	294	tls_cert_ocsp_uri(void * cert, uschar * mod)
9d1c15ef JH	295	{
	296	STACK_OF(ACCESS_DESCRIPTION) * ads = (STACK_OF(ACCESS_DESCRIPTION) *)
	297	X509_get_ext_d2i((X509 *)cert, NID_info_access, NULL, NULL);
	298	int adsnum = sk_ACCESS_DESCRIPTION_num(ads);
	299	int i;
9e4dddbd JH	300	uschar sep = '\n';
	301	uschar * list = NULL;
	302
	303	if (mod)
	304	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef JH	305
	306	for (i = 0; i < adsnum; i++)
	307	{
	308	ACCESS_DESCRIPTION * ad = sk_ACCESS_DESCRIPTION_value(ads, i);
	309
	310	if (ad && OBJ_obj2nid(ad->method) == NID_ad_OCSP)
9e4dddbd JH	311	list = string_append_listele(list, sep,
9e4dddbd JH	312	ASN1_STRING_data(ad->location->d.ia5));
9d1c15ef	313	}
9e4dddbd	314	return list;
9d1c15ef JH	315	}
	316
	317	uschar *
9e4dddbd	318	tls_cert_crl_uri(void * cert, uschar * mod)
9d1c15ef JH	319	{
	320	STACK_OF(DIST_POINT) * dps = (STACK_OF(DIST_POINT) *)
	321	X509_get_ext_d2i((X509 *)cert, NID_crl_distribution_points,
	322	NULL, NULL);
	323	DIST_POINT * dp;
	324	int dpsnum = sk_DIST_POINT_num(dps);
	325	int i;
9e4dddbd JH	326	uschar sep = '\n';
	327	uschar * list = NULL;
	328
	329	if (mod)
	330	if (mod == '>' && ++mod) sep = *mod++;
9d1c15ef JH	331
	332	if (dps) for (i = 0; i < dpsnum; i++)
	333	if ((dp = sk_DIST_POINT_value(dps, i)))
	334	{
	335	STACK_OF(GENERAL_NAME) * names = dp->distpoint->name.fullname;
	336	GENERAL_NAME * np;
	337	int nnum = sk_GENERAL_NAME_num(names);
	338	int j;
	339
	340	for (j = 0; j < nnum; j++)
	341	if ( (np = sk_GENERAL_NAME_value(names, j))
	342	&& np->type == GEN_URI
	343	)
9e4dddbd JH	344	list = string_append_listele(list, sep,
9e4dddbd JH	345	ASN1_STRING_data(np->d.uniformResourceIdentifier));
9d1c15ef	346	}
9e4dddbd	347	return list;
9d1c15ef JH	348	}
9d1c15ef JH	349
6a8a60e0 JH	350
	351
	352	/*****************************************************
	353	* Certificate operator routines
	354	*****************************************************/
	355	static uschar *
	356	fingerprint(X509 * cert, const EVP_MD * fdig)
	357	{
	358	int j;
	359	unsigned int n;
	360	uschar md[EVP_MAX_MD_SIZE];
	361	uschar * cp;
	362
	363	if (!X509_digest(cert,fdig,md,&n))
	364	{
	365	expand_string_message = US"tls_cert_fprt: out of mem\n";
	366	return NULL;
	367	}
	368	cp = store_get(n*2+1);
e3dd1d67	369	for (j = 0; j < (int)n; j++) sprintf(CS cp+2*j, "%02X", md[j]);
6a8a60e0 JH	370	return(cp);
	371	}
	372
	373	uschar *
	374	tls_cert_fprt_md5(void * cert)
	375	{
	376	return fingerprint((X509 *)cert, EVP_md5());
	377	}
	378
	379	uschar *
	380	tls_cert_fprt_sha1(void * cert)
	381	{
	382	return fingerprint((X509 *)cert, EVP_sha1());
	383	}
	384
9ef9101c JH	385	uschar *
	386	tls_cert_fprt_sha256(void * cert)
	387	{
	388	return fingerprint((X509 *)cert, EVP_sha256());
	389	}
	390
6a8a60e0	391
9d1c15ef JH	392	/* vi: aw ai sw=2
	393	*/
	394	/* End of tlscert-openssl.c */