/*
* Copyright (C) 2000 Andreas Hess, Patric Lichtsteiner, Roger Wegmann
* Copyright (C) 2001 Marco Bertossa, Andreas Schleiss
* Copyright (C) 2002 Mario Strasser
* Copyright (C) 2000-2017 Andreas Steffen
* Copyright (C) 2006-2009 Martin Willi
* Copyright (C) 2008-2017 Tobias Brunner
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include "x509_cert.h"
#include <library.h>
#include <utils/debug.h>
#include <asn1/oid.h>
#include <asn1/asn1.h>
#include <asn1/asn1_parser.h>
#include <crypto/hashers/hasher.h>
#include <credentials/keys/private_key.h>
#include <collections/linked_list.h>
#include <utils/identification.h>
#include <selectors/traffic_selector.h>
/**
* Different kinds of generalNames
*/
typedef enum {
GN_OTHER_NAME = 0,
GN_RFC822_NAME = 1,
GN_DNS_NAME = 2,
GN_X400_ADDRESS = 3,
GN_DIRECTORY_NAME = 4,
GN_EDI_PARTY_NAME = 5,
GN_URI = 6,
GN_IP_ADDRESS = 7,
GN_REGISTERED_ID = 8,
} generalNames_t;
typedef struct private_x509_cert_t private_x509_cert_t;
/**
* Private data of a x509_cert_t object.
*/
struct private_x509_cert_t {
/**
* Public interface for this certificate.
*/
x509_cert_t public;
/**
* X.509 certificate encoding in ASN.1 DER format
*/
chunk_t encoding;
/**
* SHA1 hash of the DER encoding of this X.509 certificate
*/
chunk_t encoding_hash;
/**
* X.509 certificate body over which signature is computed
*/
chunk_t tbsCertificate;
/**
* Version of the X.509 certificate
*/
u_int version;
/**
* Serial number of the X.509 certificate
*/
chunk_t serialNumber;
/**
* ID representing the certificate issuer
*/
identification_t *issuer;
/**
* Start time of certificate validity
*/
time_t notBefore;
/**
* End time of certificate validity
*/
time_t notAfter;
/**
* ID representing the certificate subject
*/
identification_t *subject;
/**
* List of subjectAltNames as identification_t
*/
linked_list_t *subjectAltNames;
/**
* List of crlDistributionPoints as x509_cdp_t*
*/
linked_list_t *crl_uris;
/**
* List of ocspAccessLocations as allocated char*
*/
linked_list_t *ocsp_uris;
/**
* List of ipAddrBlocks as traffic_selector_t
*/
linked_list_t *ipAddrBlocks;
/**
* List of permitted name constraints
*/
linked_list_t *permitted_names;
/**
* List of excluded name constraints
*/
linked_list_t *excluded_names;
/**
* List of certificatePolicies, as x509_cert_policy_t
*/
linked_list_t *cert_policies;
/**
* List of policyMappings, as x509_policy_mapping_t
*/
linked_list_t *policy_mappings;
/**
* certificate's embedded public key
*/
public_key_t *public_key;
/**
* Subject Key Identifier
*/
chunk_t subjectKeyIdentifier;
/**
* Authority Key Identifier
*/
chunk_t authKeyIdentifier;
/**
* Authority Key Serial Number
*/
chunk_t authKeySerialNumber;
/**
* Optional OID of an [unsupported] critical extension
*/
chunk_t critical_extension_oid;
/**
* Path Length Constraint
*/
u_char pathLenConstraint;
/**
* requireExplicitPolicy Constraint
*/
u_char require_explicit;
/**
* inhibitPolicyMapping Constraint
*/
u_char inhibit_mapping;
/**
* inhibitAnyPolicy Constraint
*/
u_char inhibit_any;
/**
* x509 constraints and other flags
*/
x509_flag_t flags;
/**
* Signature scheme
*/
signature_params_t *scheme;
/**
* Signature
*/
chunk_t signature;
/**
* Certificate parsed from blob/file?
*/
bool parsed;
/**
* reference count
*/
refcount_t ref;
};
/**
* Convert a generalName to a string
*/
static bool gn_to_string(identification_t *id, char **uri)
{
int len;
#ifdef USE_FUZZING
chunk_t proper;
chunk_printable(id->get_encoding(id), &proper, '?');
len = asprintf(uri, "%.*s", (int)proper.len, proper.ptr);
chunk_free(&proper);
#else
len = asprintf(uri, "%Y", id);
#endif
if (!len)
{
free(*uri);
return FALSE;
}
return len > 0;
}
/**
* Destroy a CertificatePolicy
*/
static void cert_policy_destroy(x509_cert_policy_t *this)
{
free(this->oid.ptr);
free(this->cps_uri);
free(this->unotice_text);
free(this);
}
/**
* Free policy mapping
*/
static void policy_mapping_destroy(x509_policy_mapping_t *mapping)
{
free(mapping->issuer.ptr);
free(mapping->subject.ptr);
free(mapping);
}
/**
* Parse a length constraint from an unwrapped integer
*/
static u_int parse_constraint(chunk_t object)
{
switch (object.len)
{
case 0:
return 0;
case 1:
return (object.ptr[0] & 0x80) ? X509_NO_CONSTRAINT : object.ptr[0];
default:
return X509_NO_CONSTRAINT;
}
}
/**
* ASN.1 definition of a basicConstraints extension
*/
static const asn1Object_t basicConstraintsObjects[] = {
{ 0, "basicConstraints", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
{ 1, "CA", ASN1_BOOLEAN, ASN1_DEF|ASN1_BODY }, /* 1 */
{ 1, "pathLenConstraint", ASN1_INTEGER, ASN1_OPT|ASN1_BODY }, /* 2 */
{ 1, "end opt", ASN1_EOC, ASN1_END }, /* 3 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define BASIC_CONSTRAINTS_CA 1
#define BASIC_CONSTRAINTS_PATH_LEN 2
/**
* Extracts the basicConstraints extension
*/
static bool parse_basicConstraints(chunk_t blob, int level0,
private_x509_cert_t *this)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
bool isCA = FALSE;
bool success;
parser = asn1_parser_create(basicConstraintsObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case BASIC_CONSTRAINTS_CA:
isCA = object.len && *object.ptr;
DBG2(DBG_ASN, " %s", isCA ? "TRUE" : "FALSE");
if (isCA)
{
this->flags |= X509_CA;
}
break;
case BASIC_CONSTRAINTS_PATH_LEN:
if (isCA)
{
this->pathLenConstraint = parse_constraint(object);
}
break;
default:
break;
}
}
success = parser->success(parser);
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of otherName
*/
static const asn1Object_t otherNameObjects[] = {
{0, "type-id", ASN1_OID, ASN1_BODY }, /* 0 */
{0, "value", ASN1_CONTEXT_C_0, ASN1_BODY }, /* 1 */
{0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define ON_OBJ_ID_TYPE 0
#define ON_OBJ_VALUE 1
/**
* Extracts an otherName
*/
static bool parse_otherName(chunk_t *blob, int level0, id_type_t *type)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
int oid = OID_UNKNOWN;
bool success = FALSE;
parser = asn1_parser_create(otherNameObjects, *blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case ON_OBJ_ID_TYPE:
oid = asn1_known_oid(object);
break;
case ON_OBJ_VALUE:
switch (oid)
{
case OID_XMPP_ADDR:
if (asn1_parse_simple_object(&object, ASN1_UTF8STRING,
parser->get_level(parser)+1, "xmppAddr"))
{ /* we handle xmppAddr as RFC822 addr */
*blob = object;
*type = ID_RFC822_ADDR;
}
else
{
goto end;
}
break;
case OID_USER_PRINCIPAL_NAME:
if (asn1_parse_simple_object(&object, ASN1_UTF8STRING,
parser->get_level(parser)+1, "msUPN"))
{ /* we handle UPNs as RFC822 addr */
*blob = object;
*type = ID_RFC822_ADDR;
}
else
{
goto end;
}
break;
}
break;
default:
break;
}
}
success = parser->success(parser);
end:
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of generalName
*/
static const asn1Object_t generalNameObjects[] = {
{ 0, "otherName", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_BODY }, /* 0 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 1 */
{ 0, "rfc822Name", ASN1_CONTEXT_S_1, ASN1_OPT|ASN1_BODY }, /* 2 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 3 */
{ 0, "dnsName", ASN1_CONTEXT_S_2, ASN1_OPT|ASN1_BODY }, /* 4 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 5 */
{ 0, "x400Address", ASN1_CONTEXT_S_3, ASN1_OPT|ASN1_BODY }, /* 6 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 7 */
{ 0, "directoryName", ASN1_CONTEXT_C_4, ASN1_OPT|ASN1_BODY }, /* 8 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 9 */
{ 0, "ediPartyName", ASN1_CONTEXT_C_5, ASN1_OPT|ASN1_BODY }, /* 10 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 11 */
{ 0, "URI", ASN1_CONTEXT_S_6, ASN1_OPT|ASN1_BODY }, /* 12 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 13 */
{ 0, "ipAddress", ASN1_CONTEXT_S_7, ASN1_OPT|ASN1_BODY }, /* 14 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 15 */
{ 0, "registeredID", ASN1_CONTEXT_S_8, ASN1_OPT|ASN1_BODY }, /* 16 */
{ 0, "end choice", ASN1_EOC, ASN1_END }, /* 17 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define GN_OBJ_OTHER_NAME 0
#define GN_OBJ_RFC822_NAME 2
#define GN_OBJ_DNS_NAME 4
#define GN_OBJ_X400_ADDRESS 6
#define GN_OBJ_DIRECTORY_NAME 8
#define GN_OBJ_EDI_PARTY_NAME 10
#define GN_OBJ_URI 12
#define GN_OBJ_IP_ADDRESS 14
#define GN_OBJ_REGISTERED_ID 16
/**
* Extracts a generalName
*/
static identification_t *parse_generalName(chunk_t blob, int level0)
{
asn1_parser_t *parser;
chunk_t object;
int objectID ;
identification_t *gn = NULL;
parser = asn1_parser_create(generalNameObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
id_type_t id_type = ID_ANY;
switch (objectID)
{
case GN_OBJ_RFC822_NAME:
id_type = ID_RFC822_ADDR;
break;
case GN_OBJ_DNS_NAME:
id_type = ID_FQDN;
break;
case GN_OBJ_URI:
id_type = ID_DER_ASN1_GN_URI;
break;
case GN_OBJ_DIRECTORY_NAME:
id_type = ID_DER_ASN1_DN;
break;
case GN_OBJ_IP_ADDRESS:
switch (object.len)
{
case 4:
id_type = ID_IPV4_ADDR;
break;
case 16:
id_type = ID_IPV6_ADDR;
break;
default:
break;
}
break;
case GN_OBJ_OTHER_NAME:
if (!parse_otherName(&object, parser->get_level(parser)+1,
&id_type))
{
goto end;
}
break;
case GN_OBJ_X400_ADDRESS:
case GN_OBJ_EDI_PARTY_NAME:
case GN_OBJ_REGISTERED_ID:
default:
break;
}
if (id_type != ID_ANY)
{
gn = identification_create_from_encoding(id_type, object);
DBG2(DBG_ASN, " '%Y'", gn);
goto end;
}
}
end:
parser->destroy(parser);
return gn;
}
/**
* ASN.1 definition of generalNames
*/
static const asn1Object_t generalNamesObjects[] = {
{ 0, "generalNames", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "generalName", ASN1_EOC, ASN1_RAW }, /* 1 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 2 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define GENERAL_NAMES_GN 1
/**
* Extracts one or several GNs and puts them into a chained list
*/
bool x509_parse_generalNames(chunk_t blob, int level0, bool implicit,
linked_list_t *list)
{
asn1_parser_t *parser;
chunk_t object;
identification_t *gn;
int objectID;
bool success = FALSE;
parser = asn1_parser_create(generalNamesObjects, blob);
parser->set_top_level(parser, level0);
parser->set_flags(parser, implicit, FALSE);
while (parser->iterate(parser, &objectID, &object))
{
if (objectID == GENERAL_NAMES_GN)
{
gn = parse_generalName(object, parser->get_level(parser)+1);
if (!gn)
{
goto end;
}
list->insert_last(list, (void *)gn);
}
}
success = parser->success(parser);
end:
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of a authorityKeyIdentifier extension
*/
static const asn1Object_t authKeyIdentifierObjects[] = {
{ 0, "authorityKeyIdentifier", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
{ 1, "keyIdentifier", ASN1_CONTEXT_S_0, ASN1_OPT|ASN1_BODY }, /* 1 */
{ 1, "end opt", ASN1_EOC, ASN1_END }, /* 2 */
{ 1, "authorityCertIssuer", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_OBJ }, /* 3 */
{ 1, "end opt", ASN1_EOC, ASN1_END }, /* 4 */
{ 1, "authorityCertSerialNumber", ASN1_CONTEXT_S_2, ASN1_OPT|ASN1_BODY }, /* 5 */
{ 1, "end opt", ASN1_EOC, ASN1_END }, /* 6 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define AUTH_KEY_ID_KEY_ID 1
#define AUTH_KEY_ID_CERT_ISSUER 3
#define AUTH_KEY_ID_CERT_SERIAL 5
/**
* Extracts an authoritykeyIdentifier
*/
chunk_t x509_parse_authorityKeyIdentifier(chunk_t blob, int level0,
chunk_t *authKeySerialNumber)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
chunk_t authKeyIdentifier = chunk_empty;
*authKeySerialNumber = chunk_empty;
parser = asn1_parser_create(authKeyIdentifierObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case AUTH_KEY_ID_KEY_ID:
authKeyIdentifier = chunk_clone(object);
break;
case AUTH_KEY_ID_CERT_ISSUER:
/* TODO: x509_parse_generalNames(object, level+1, TRUE); */
break;
case AUTH_KEY_ID_CERT_SERIAL:
*authKeySerialNumber = object;
break;
default:
break;
}
}
parser->destroy(parser);
return authKeyIdentifier;
}
/**
* ASN.1 definition of a authorityInfoAccess extension
*/
static const asn1Object_t authInfoAccessObjects[] = {
{ 0, "authorityInfoAccess", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "accessDescription", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
{ 2, "accessMethod", ASN1_OID, ASN1_BODY }, /* 2 */
{ 2, "accessLocation", ASN1_EOC, ASN1_RAW }, /* 3 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 4 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define AUTH_INFO_ACCESS_METHOD 2
#define AUTH_INFO_ACCESS_LOCATION 3
/**
* Extracts an authorityInfoAcess location
*/
static bool parse_authorityInfoAccess(chunk_t blob, int level0,
private_x509_cert_t *this)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
int accessMethod = OID_UNKNOWN;
bool success = FALSE;
parser = asn1_parser_create(authInfoAccessObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case AUTH_INFO_ACCESS_METHOD:
accessMethod = asn1_known_oid(object);
break;
case AUTH_INFO_ACCESS_LOCATION:
{
switch (accessMethod)
{
case OID_OCSP:
case OID_CA_ISSUERS:
{
identification_t *id;
char *uri;
id = parse_generalName(object,
parser->get_level(parser)+1);
if (id == NULL)
{
/* parsing went wrong - abort */
goto end;
}
DBG2(DBG_ASN, " '%Y'", id);
if (accessMethod == OID_OCSP &&
gn_to_string(id, &uri))
{
this->ocsp_uris->insert_last(this->ocsp_uris, uri);
}
id->destroy(id);
}
break;
default:
/* unknown accessMethod, ignoring */
break;
}
break;
}
default:
break;
}
}
success = parser->success(parser);
end:
parser->destroy(parser);
return success;
}
/**
* Extract KeyUsage flags
*/
static void parse_keyUsage(chunk_t blob, private_x509_cert_t *this)
{
enum {
KU_DIGITAL_SIGNATURE = 0,
KU_NON_REPUDIATION = 1,
KU_KEY_ENCIPHERMENT = 2,
KU_DATA_ENCIPHERMENT = 3,
KU_KEY_AGREEMENT = 4,
KU_KEY_CERT_SIGN = 5,
KU_CRL_SIGN = 6,
KU_ENCIPHER_ONLY = 7,
KU_DECIPHER_ONLY = 8,
};
/* to be compliant with RFC 4945 specific KUs have to be included */
this->flags &= ~X509_IKE_COMPLIANT;
if (asn1_unwrap(&blob, &blob) == ASN1_BIT_STRING && blob.len)
{
int bit, byte, unused = blob.ptr[0];
blob = chunk_skip(blob, 1);
for (byte = 0; byte < blob.len; byte++)
{
for (bit = 0; bit < 8; bit++)
{
if (byte == blob.len - 1 && bit > (7 - unused))
{
break;
}
if (blob.ptr[byte] & 1 << (7 - bit))
{
switch (byte * 8 + bit)
{
case KU_CRL_SIGN:
this->flags |= X509_CRL_SIGN;
break;
case KU_DIGITAL_SIGNATURE:
case KU_NON_REPUDIATION:
this->flags |= X509_IKE_COMPLIANT;
break;
case KU_KEY_CERT_SIGN:
/* we use the caBasicConstraint, MUST be set */
case KU_KEY_ENCIPHERMENT:
case KU_DATA_ENCIPHERMENT:
case KU_KEY_AGREEMENT:
case KU_ENCIPHER_ONLY:
case KU_DECIPHER_ONLY:
break;
}
}
}
}
}
}
/**
* ASN.1 definition of a extendedKeyUsage extension
*/
static const asn1Object_t extendedKeyUsageObjects[] = {
{ 0, "extendedKeyUsage", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "keyPurposeID", ASN1_OID, ASN1_BODY }, /* 1 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 2 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define EXT_KEY_USAGE_PURPOSE_ID 1
/**
* Extracts extendedKeyUsage OIDs
*/
static bool parse_extendedKeyUsage(chunk_t blob, int level0,
private_x509_cert_t *this)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
bool success;
parser = asn1_parser_create(extendedKeyUsageObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
if (objectID == EXT_KEY_USAGE_PURPOSE_ID)
{
switch (asn1_known_oid(object))
{
case OID_SERVER_AUTH:
this->flags |= X509_SERVER_AUTH;
break;
case OID_CLIENT_AUTH:
this->flags |= X509_CLIENT_AUTH;
break;
case OID_IKE_INTERMEDIATE:
this->flags |= X509_IKE_INTERMEDIATE;
break;
case OID_OCSP_SIGNING:
this->flags |= X509_OCSP_SIGNER;
break;
case OID_MS_SMARTCARD_LOGON:
this->flags |= X509_MS_SMARTCARD_LOGON;
break;
default:
break;
}
}
}
success = parser->success(parser);
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of crlDistributionPoints
*/
static const asn1Object_t crlDistributionPointsObjects[] = {
{ 0, "crlDistributionPoints", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "DistributionPoint", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
{ 2, "distributionPoint", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_CHOICE }, /* 2 */
{ 3, "fullName", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_OBJ }, /* 3 */
{ 3, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 4 */
{ 3, "nameRelToCRLIssuer",ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_BODY }, /* 5 */
{ 3, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 6 */
{ 2, "end opt/choices", ASN1_EOC, ASN1_END|ASN1_CHOICE }, /* 7 */
{ 2, "reasons", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_BODY }, /* 8 */
{ 2, "end opt", ASN1_EOC, ASN1_END }, /* 9 */
{ 2, "crlIssuer", ASN1_CONTEXT_C_2, ASN1_OPT|ASN1_OBJ }, /* 10 */
{ 2, "end opt", ASN1_EOC, ASN1_END }, /* 11 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 12 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define CRL_DIST_POINTS 1
#define CRL_DIST_POINTS_FULLNAME 3
#define CRL_DIST_POINTS_ISSUER 10
/**
* Add entry to the list of each pairing of URI and Issuer
*/
static void add_cdps(linked_list_t *list, linked_list_t *uris,
linked_list_t *issuers)
{
identification_t *issuer, *id;
enumerator_t *enumerator;
x509_cdp_t *cdp;
char *uri;
while (uris->remove_last(uris, (void**)&id) == SUCCESS)
{
if (gn_to_string(id, &uri))
{
if (issuers->get_count(issuers))
{
enumerator = issuers->create_enumerator(issuers);
while (enumerator->enumerate(enumerator, &issuer))
{
INIT(cdp,
.uri = strdup(uri),
.issuer = issuer->clone(issuer),
);
list->insert_last(list, cdp);
}
enumerator->destroy(enumerator);
free(uri);
}
else
{
INIT(cdp,
.uri = uri,
);
list->insert_last(list, cdp);
}
}
id->destroy(id);
}
while (issuers->remove_last(issuers, (void**)&id) == SUCCESS)
{
id->destroy(id);
}
}
/**
* Extracts one or several crlDistributionPoints into a list
*/
bool x509_parse_crlDistributionPoints(chunk_t blob, int level0,
linked_list_t *list)
{
linked_list_t *uris, *issuers;
asn1_parser_t *parser;
chunk_t object;
int objectID;
bool success = FALSE;
uris = linked_list_create();
issuers = linked_list_create();
parser = asn1_parser_create(crlDistributionPointsObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case CRL_DIST_POINTS:
add_cdps(list, uris, issuers);
break;
case CRL_DIST_POINTS_FULLNAME:
if (!x509_parse_generalNames(object,
parser->get_level(parser) + 1, TRUE, uris))
{
goto end;
}
break;
case CRL_DIST_POINTS_ISSUER:
if (!x509_parse_generalNames(object,
parser->get_level(parser) + 1, TRUE, issuers))
{
goto end;
}
break;
default:
break;
}
}
success = parser->success(parser);
add_cdps(list, uris, issuers);
end:
parser->destroy(parser);
uris->destroy_offset(uris, offsetof(identification_t, destroy));
issuers->destroy_offset(issuers, offsetof(identification_t, destroy));
return success;
}
/**
* ASN.1 definition of nameConstraints
*/
static const asn1Object_t nameConstraintsObjects[] = {
{ 0, "nameConstraints", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
{ 1, "permittedSubtrees", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_LOOP }, /* 1 */
{ 2, "generalSubtree", ASN1_SEQUENCE, ASN1_BODY }, /* 2 */
{ 1, "end loop", ASN1_EOC, ASN1_END }, /* 3 */
{ 1, "excludedSubtrees", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_LOOP }, /* 4 */
{ 2, "generalSubtree", ASN1_SEQUENCE, ASN1_BODY }, /* 5 */
{ 1, "end loop", ASN1_EOC, ASN1_END }, /* 6 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define NAME_CONSTRAINT_PERMITTED 2
#define NAME_CONSTRAINT_EXCLUDED 5
/**
* Parse permitted/excluded nameConstraints
*/
static bool parse_nameConstraints(chunk_t blob, int level0,
private_x509_cert_t *this)
{
asn1_parser_t *parser;
identification_t *id;
chunk_t object;
int objectID;
bool success = FALSE;
parser = asn1_parser_create(nameConstraintsObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case NAME_CONSTRAINT_PERMITTED:
id = parse_generalName(object, parser->get_level(parser) + 1);
if (!id)
{
goto end;
}
this->permitted_names->insert_last(this->permitted_names, id);
break;
case NAME_CONSTRAINT_EXCLUDED:
id = parse_generalName(object, parser->get_level(parser) + 1);
if (!id)
{
goto end;
}
this->excluded_names->insert_last(this->excluded_names, id);
break;
default:
break;
}
}
success = parser->success(parser);
end:
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of a certificatePolicies extension
*/
static const asn1Object_t certificatePoliciesObject[] = {
{ 0, "certificatePolicies", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "policyInformation", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
{ 2, "policyId", ASN1_OID, ASN1_BODY }, /* 2 */
{ 2, "qualifiers", ASN1_SEQUENCE, ASN1_OPT|ASN1_LOOP }, /* 3 */
{ 3, "qualifierInfo", ASN1_SEQUENCE, ASN1_NONE }, /* 4 */
{ 4, "qualifierId", ASN1_OID, ASN1_BODY }, /* 5 */
{ 4, "qualifier", ASN1_EOC, ASN1_CHOICE }, /* 6 */
{ 5, "cPSuri", ASN1_IA5STRING, ASN1_OPT|ASN1_BODY }, /* 7 */
{ 5, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 8 */
{ 5, "userNotice", ASN1_SEQUENCE, ASN1_OPT|ASN1_BODY }, /* 9 */
{ 6, "explicitText", ASN1_EOC, ASN1_RAW }, /* 10 */
{ 5, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 11 */
{ 4, "end choices", ASN1_EOC, ASN1_END|ASN1_CHOICE }, /* 12 */
{ 2, "end opt/loop", ASN1_EOC, ASN1_END }, /* 13 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 14 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define CERT_POLICY_ID 2
#define CERT_POLICY_QUALIFIER_ID 5
#define CERT_POLICY_CPS_URI 7
#define CERT_POLICY_EXPLICIT_TEXT 10
/**
* Parse certificatePolicies
*/
static bool parse_certificatePolicies(chunk_t blob, int level0,
private_x509_cert_t *this)
{
x509_cert_policy_t *policy = NULL;
asn1_parser_t *parser;
chunk_t object;
int objectID, qualifier = OID_UNKNOWN;
bool success;
parser = asn1_parser_create(certificatePoliciesObject, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case CERT_POLICY_ID:
INIT(policy,
.oid = chunk_clone(object),
);
this->cert_policies->insert_last(this->cert_policies, policy);
break;
case CERT_POLICY_QUALIFIER_ID:
qualifier = asn1_known_oid(object);
break;
case CERT_POLICY_CPS_URI:
if (policy && !policy->cps_uri && object.len &&
qualifier == OID_POLICY_QUALIFIER_CPS &&
chunk_printable(object, NULL, 0))
{
policy->cps_uri = strndup(object.ptr, object.len);
}
break;
case CERT_POLICY_EXPLICIT_TEXT:
/* TODO */
break;
default:
break;
}
}
success = parser->success(parser);
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of a policyMappings extension
*/
static const asn1Object_t policyMappingsObjects[] = {
{ 0, "policyMappings", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "policyMapping", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
{ 2, "issuerPolicy", ASN1_OID, ASN1_BODY }, /* 2 */
{ 2, "subjectPolicy", ASN1_OID, ASN1_BODY }, /* 3 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 4 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define POLICY_MAPPING 1
#define POLICY_MAPPING_ISSUER 2
#define POLICY_MAPPING_SUBJECT 3
/**
* Parse policyMappings
*/
static bool parse_policyMappings(chunk_t blob, int level0,
private_x509_cert_t *this)
{
x509_policy_mapping_t *map = NULL;
asn1_parser_t *parser;
chunk_t object;
int objectID;
bool success;
parser = asn1_parser_create(policyMappingsObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case POLICY_MAPPING:
INIT(map);
this->policy_mappings->insert_last(this->policy_mappings, map);
break;
case POLICY_MAPPING_ISSUER:
if (map && !map->issuer.len)
{
map->issuer = chunk_clone(object);
}
break;
case POLICY_MAPPING_SUBJECT:
if (map && !map->subject.len)
{
map->subject = chunk_clone(object);
}
break;
default:
break;
}
}
success = parser->success(parser);
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of a policyConstraints extension
*/
static const asn1Object_t policyConstraintsObjects[] = {
{ 0, "policyConstraints", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
{ 1, "requireExplicitPolicy", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_NONE }, /* 1 */
{ 2, "SkipCerts", ASN1_INTEGER, ASN1_BODY }, /* 2 */
{ 1, "end opt", ASN1_EOC, ASN1_END }, /* 3 */
{ 1, "inhibitPolicyMapping", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_NONE }, /* 4 */
{ 2, "SkipCerts", ASN1_INTEGER, ASN1_BODY }, /* 5 */
{ 1, "end opt", ASN1_EOC, ASN1_END }, /* 6 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define POLICY_CONSTRAINT_EXPLICIT 2
#define POLICY_CONSTRAINT_INHIBIT 5
/**
* Parse policyConstraints
*/
static bool parse_policyConstraints(chunk_t blob, int level0,
private_x509_cert_t *this)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
bool success;
parser = asn1_parser_create(policyConstraintsObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case POLICY_CONSTRAINT_EXPLICIT:
this->require_explicit = parse_constraint(object);
break;
case POLICY_CONSTRAINT_INHIBIT:
this->inhibit_mapping = parse_constraint(object);
break;
default:
break;
}
}
success = parser->success(parser);
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of ipAddrBlocks according to RFC 3779
*/
static const asn1Object_t ipAddrBlocksObjects[] = {
{ 0, "ipAddrBlocks", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
{ 1, "ipAddressFamily", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
{ 2, "addressFamily", ASN1_OCTET_STRING, ASN1_BODY }, /* 2 */
{ 2, "ipAddressChoice", ASN1_EOC, ASN1_CHOICE }, /* 3 */
{ 3, "inherit", ASN1_NULL, ASN1_OPT }, /* 4 */
{ 3, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 5 */
{ 3, "addressesOrRanges", ASN1_SEQUENCE, ASN1_OPT|ASN1_LOOP }, /* 6 */
{ 4, "addressOrRange", ASN1_EOC, ASN1_CHOICE }, /* 7 */
{ 5, "addressPrefix", ASN1_BIT_STRING, ASN1_OPT|ASN1_BODY }, /* 8 */
{ 5, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 9 */
{ 5, "addressRange", ASN1_SEQUENCE, ASN1_OPT }, /* 10 */
{ 6, "min", ASN1_BIT_STRING, ASN1_BODY }, /* 11 */
{ 6, "max", ASN1_BIT_STRING, ASN1_BODY }, /* 12 */
{ 5, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 13 */
{ 4, "end choices", ASN1_EOC, ASN1_END|ASN1_CHOICE }, /* 14 */
{ 3, "end loop/choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 15 */
{ 2, "end choices", ASN1_EOC, ASN1_END|ASN1_CHOICE }, /* 16 */
{ 0, "end loop", ASN1_EOC, ASN1_END }, /* 17 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define IP_ADDR_BLOCKS_FAMILY 2
#define IP_ADDR_BLOCKS_INHERIT 4
#define IP_ADDR_BLOCKS_PREFIX 8
#define IP_ADDR_BLOCKS_MIN 11
#define IP_ADDR_BLOCKS_MAX 12
static bool check_address_object(ts_type_t ts_type, chunk_t object)
{
switch (ts_type)
{
case TS_IPV4_ADDR_RANGE:
if (object.len > 5)
{
DBG1(DBG_ASN, "IPv4 address object is larger than 5 octets");
return FALSE;
}
break;
case TS_IPV6_ADDR_RANGE:
if (object.len > 17)
{
DBG1(DBG_ASN, "IPv6 address object is larger than 17 octets");
return FALSE;
}
break;
default:
DBG1(DBG_ASN, "unknown address family");
return FALSE;
}
if (object.len == 0)
{
DBG1(DBG_ASN, "An ASN.1 bit string must contain at least the "
"initial octet");
return FALSE;
}
if (object.len == 1 && object.ptr[0] != 0)
{
DBG1(DBG_ASN, "An empty ASN.1 bit string must contain a zero "
"initial octet");
return FALSE;
}
if (object.ptr[0] > 7)
{
DBG1(DBG_ASN, "number of unused bits is too large");
return FALSE;
}
return TRUE;
}
static bool parse_ipAddrBlocks(chunk_t blob, int level0,
private_x509_cert_t *this)
{
asn1_parser_t *parser;
chunk_t object, min_object;
ts_type_t ts_type = 0;
traffic_selector_t *ts;
int objectID;
bool success = FALSE;
parser = asn1_parser_create(ipAddrBlocksObjects, blob);
parser->set_top_level(parser, level0);
while (parser->iterate(parser, &objectID, &object))
{
switch (objectID)
{
case IP_ADDR_BLOCKS_FAMILY:
ts_type = 0;
if (object.len == 2 && object.ptr[0] == 0)
{
if (object.ptr[1] == 1)
{
ts_type = TS_IPV4_ADDR_RANGE;
}
else if (object.ptr[1] == 2)
{
ts_type = TS_IPV6_ADDR_RANGE;
}
else
{
break;
}
DBG2(DBG_ASN, " %N", ts_type_name, ts_type);
}
break;
case IP_ADDR_BLOCKS_INHERIT:
DBG1(DBG_ASN, "inherit choice is not supported");
break;
case IP_ADDR_BLOCKS_PREFIX:
if (!check_address_object(ts_type, object))
{
goto end;
}
ts = traffic_selector_create_from_rfc3779_format(ts_type,
object, object);
DBG2(DBG_ASN, " %R", ts);
this->ipAddrBlocks->insert_last(this->ipAddrBlocks, ts);
break;
case IP_ADDR_BLOCKS_MIN:
if (!check_address_object(ts_type, object))
{
goto end;
}
min_object = object;
break;
case IP_ADDR_BLOCKS_MAX:
if (!check_address_object(ts_type, object))
{
goto end;
}
ts = traffic_selector_create_from_rfc3779_format(ts_type,
min_object, object);
DBG2(DBG_ASN, " %R", ts);
this->ipAddrBlocks->insert_last(this->ipAddrBlocks, ts);
break;
default:
break;
}
}
success = parser->success(parser);
this->flags |= X509_IP_ADDR_BLOCKS;
end:
parser->destroy(parser);
return success;
}
/**
* ASN.1 definition of an X.509v3 x509_cert
*/
static const asn1Object_t certObjects[] = {
{ 0, "x509", ASN1_SEQUENCE, ASN1_OBJ }, /* 0 */
{ 1, "tbsCertificate", ASN1_SEQUENCE, ASN1_OBJ }, /* 1 */
{ 2, "DEFAULT v1", ASN1_CONTEXT_C_0, ASN1_DEF }, /* 2 */
{ 3, "version", ASN1_INTEGER, ASN1_BODY }, /* 3 */
{ 2, "serialNumber", ASN1_INTEGER, ASN1_BODY }, /* 4 */
{ 2, "signature", ASN1_EOC, ASN1_RAW }, /* 5 */
{ 2, "issuer", ASN1_SEQUENCE, ASN1_OBJ }, /* 6 */
{ 2, "validity", ASN1_SEQUENCE, ASN1_NONE }, /* 7 */
{ 3, "notBefore", ASN1_EOC, ASN1_RAW }, /* 8 */
{ 3, "notAfter", ASN1_EOC, ASN1_RAW }, /* 9 */
{ 2, "subject", ASN1_SEQUENCE, ASN1_OBJ }, /* 10 */
{ 2, "subjectPublicKeyInfo",ASN1_SEQUENCE, ASN1_RAW }, /* 11 */
{ 2, "issuerUniqueID", ASN1_CONTEXT_C_1, ASN1_OPT }, /* 12 */
{ 2, "end opt", ASN1_EOC, ASN1_END }, /* 13 */
{ 2, "subjectUniqueID", ASN1_CONTEXT_C_2, ASN1_OPT }, /* 14 */
{ 2, "end opt", ASN1_EOC, ASN1_END }, /* 15 */
{ 2, "optional extensions", ASN1_CONTEXT_C_3, ASN1_OPT }, /* 16 */
{ 3, "extensions", ASN1_SEQUENCE, ASN1_LOOP }, /* 17 */
{ 4, "extension", ASN1_SEQUENCE, ASN1_NONE }, /* 18 */
{ 5, "extnID", ASN1_OID, ASN1_BODY }, /* 19 */
{ 5, "critical", ASN1_BOOLEAN, ASN1_DEF|ASN1_BODY }, /* 20 */
{ 5, "extnValue", ASN1_OCTET_STRING, ASN1_BODY }, /* 21 */
{ 3, "end loop", ASN1_EOC, ASN1_END }, /* 22 */
{ 2, "end opt", ASN1_EOC, ASN1_END }, /* 23 */
{ 1, "signatureAlgorithm", ASN1_EOC, ASN1_RAW }, /* 24 */
{ 1, "signatureValue", ASN1_BIT_STRING, ASN1_BODY }, /* 25 */
{ 0, "exit", ASN1_EOC, ASN1_EXIT }
};
#define X509_OBJ_TBS_CERTIFICATE 1
#define X509_OBJ_VERSION 3
#define X509_OBJ_SERIAL_NUMBER 4
#define X509_OBJ_SIG_ALG 5
#define X509_OBJ_ISSUER 6
#define X509_OBJ_NOT_BEFORE 8
#define X509_OBJ_NOT_AFTER 9
#define X509_OBJ_SUBJECT 10
#define X509_OBJ_SUBJECT_PUBLIC_KEY_INFO 11
#define X509_OBJ_OPTIONAL_EXTENSIONS 16
#define X509_OBJ_EXTN_ID 19
#define X509_OBJ_CRITICAL 20
#define X509_OBJ_EXTN_VALUE 21
#define X509_OBJ_ALGORITHM 24
#define X509_OBJ_SIGNATURE 25
/**
* Parses an X.509v3 certificate
*/
static bool parse_certificate(private_x509_cert_t *this)
{
asn1_parser_t *parser;
chunk_t object;
int objectID;
int extn_oid = OID_UNKNOWN;
signature_params_t sig_alg = {};
bool success = FALSE;
bool critical = FALSE;
parser = asn1_parser_create(certObjects, this->encoding);
/* unless we see a keyUsage extension we are compliant with RFC 4945 */
this->flags |= X509_IKE_COMPLIANT;
while (parser->iterate(parser, &objectID, &object))
{
u_int level = parser->get_level(parser)+1;
switch (objectID)
{
case X509_OBJ_TBS_CERTIFICATE:
this->tbsCertificate = object;
break;
case X509_OBJ_VERSION:
this->version = (object.len) ? (1+(u_int)*object.ptr) : 1;
if (this->version < 1 || this->version > 3)
{
DBG1(DBG_ASN, "X.509v%d not supported", this->version);
goto end;
}
else
{
DBG2(DBG_ASN, " X.509v%d", this->version);
}
break;
case X509_OBJ_SERIAL_NUMBER:
this->serialNumber = object;
break;
case X509_OBJ_SIG_ALG:
if (!signature_params_parse(object, level, &sig_alg))
{
DBG1(DBG_ASN, " unable to parse signature algorithm");
goto end;
}
break;
case X509_OBJ_ISSUER:
this->issuer = identification_create_from_encoding(ID_DER_ASN1_DN, object);
DBG2(DBG_ASN, " '%Y'", this->issuer);
break;
case X509_OBJ_NOT_BEFORE:
this->notBefore = asn1_parse_time(object, level);
break;
case X509_OBJ_NOT_AFTER:
this->notAfter = asn1_parse_time(object, level);
break;
case X509_OBJ_SUBJECT:
this->subject = identification_create_from_encoding(ID_DER_ASN1_DN, object);
DBG2(DBG_ASN, " '%Y'", this->subject);
break;
case X509_OBJ_SUBJECT_PUBLIC_KEY_INFO:
DBG2(DBG_ASN, "-- > --");
this->public_key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY,
KEY_ANY, BUILD_BLOB_ASN1_DER, object, BUILD_END);
DBG2(DBG_ASN, "-- < --");
if (this->public_key == NULL)
{
goto end;
}
break;
case X509_OBJ_OPTIONAL_EXTENSIONS:
if (this->version != 3)
{
DBG1(DBG_ASN, "Only X.509v3 certificates have extensions");
goto end;
}
break;
case X509_OBJ_EXTN_ID:
extn_oid = asn1_known_oid(object);
break;
case X509_OBJ_CRITICAL:
critical = object.len && *object.ptr;
DBG2(DBG_ASN, " %s", critical ? "TRUE" : "FALSE");
break;
case X509_OBJ_EXTN_VALUE:
{
switch (extn_oid)
{
case OID_SUBJECT_KEY_ID:
if (!asn1_parse_simple_object(&object, ASN1_OCTET_STRING,
level, "keyIdentifier"))
{
goto end;
}
this->subjectKeyIdentifier = object;
break;
case OID_SUBJECT_ALT_NAME:
if (!x509_parse_generalNames(object, level, FALSE,
this->subjectAltNames))
{
goto end;
}
break;
case OID_BASIC_CONSTRAINTS:
if (!parse_basicConstraints(object, level, this))
{
goto end;
}
break;
case OID_CRL_DISTRIBUTION_POINTS:
if (!x509_parse_crlDistributionPoints(object, level,
this->crl_uris))
{
goto end;
}
break;
case OID_AUTHORITY_KEY_ID:
chunk_free(&this->authKeyIdentifier);
this->authKeyIdentifier = x509_parse_authorityKeyIdentifier(
object, level, &this->authKeySerialNumber);
break;
case OID_AUTHORITY_INFO_ACCESS:
if (!parse_authorityInfoAccess(object, level, this))
{
goto end;
}
break;
case OID_KEY_USAGE:
parse_keyUsage(object, this);
break;
case OID_EXTENDED_KEY_USAGE:
if (!parse_extendedKeyUsage(object, level, this))
{
goto end;
}
break;
case OID_IP_ADDR_BLOCKS:
if (!parse_ipAddrBlocks(object, level, this))
{
goto end;
}
break;
case OID_NAME_CONSTRAINTS:
if (!parse_nameConstraints(object, level, this))
{
goto end;
}
break;
case OID_CERTIFICATE_POLICIES:
if (!parse_certificatePolicies(object, level, this))
{
goto end;
}
break;
case OID_POLICY_MAPPINGS:
if (!parse_policyMappings(object, level, this))
{
goto end;
}
break;
case OID_POLICY_CONSTRAINTS:
if (!parse_policyConstraints(object, level, this))
{
goto end;
}
break;
case OID_INHIBIT_ANY_POLICY:
if (!asn1_parse_simple_object(&object, ASN1_INTEGER,
level, "inhibitAnyPolicy"))
{
goto end;
}
this->inhibit_any = parse_constraint(object);
break;
case OID_NS_REVOCATION_URL:
case OID_NS_CA_REVOCATION_URL:
case OID_NS_CA_POLICY_URL:
case OID_NS_COMMENT:
if (!asn1_parse_simple_object(&object, ASN1_IA5STRING,
level, oid_names[extn_oid].name))
{
goto end;
}
break;
default:
if (critical && lib->settings->get_bool(lib->settings,
"%s.x509.enforce_critical", TRUE, lib->ns))
{
DBG1(DBG_ASN, "critical '%s' extension not supported",
(extn_oid == OID_UNKNOWN) ? "unknown" :
(char*)oid_names[extn_oid].name);
goto end;
}
break;
}
break;
}
case X509_OBJ_ALGORITHM:
INIT(this->scheme);
if (!signature_params_parse(object, level, this->scheme))
{
DBG1(DBG_ASN, " unable to parse signature algorithm");
goto end;
}
if (!signature_params_equal(this->scheme, &sig_alg))
{
DBG1(DBG_ASN, " signature algorithms do not agree");
goto end;
}
break;
case X509_OBJ_SIGNATURE:
this->signature = chunk_skip(object, 1);
break;
default:
break;
}
}
success = parser->success(parser);
end:
parser->destroy(parser);
signature_params_clear(&sig_alg);
if (success)
{
hasher_t *hasher;
/* check if the certificate is self-signed */
if (this->public.interface.interface.issued_by(
&this->public.interface.interface,
&this->public.interface.interface,
NULL))
{
this->flags |= X509_SELF_SIGNED;
}
/* create certificate hash */
hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (!hasher ||
!hasher->allocate_hash(hasher, this->encoding, &this->encoding_hash))
{
DESTROY_IF(hasher);
DBG1(DBG_ASN, " unable to create hash of certificate, SHA1 not supported");
return FALSE;
}
hasher->destroy(hasher);
}
return success;
}
METHOD(certificate_t, get_type, certificate_type_t,
private_x509_cert_t *this)
{
return CERT_X509;
}
METHOD(certificate_t, get_subject, identification_t*,
private_x509_cert_t *this)
{
return this->subject;
}
METHOD(certificate_t, get_issuer, identification_t*,
private_x509_cert_t *this)
{
return this->issuer;
}
METHOD(certificate_t, has_subject, id_match_t,
private_x509_cert_t *this, identification_t *subject)
{
identification_t *current;
enumerator_t *enumerator;
id_match_t match, best;
chunk_t encoding;
if (subject->get_type(subject) == ID_KEY_ID)
{
encoding = subject->get_encoding(subject);
if (this->encoding_hash.len &&
chunk_equals(this->encoding_hash, encoding))
{
return ID_MATCH_PERFECT;
}
if (this->subjectKeyIdentifier.len &&
chunk_equals(this->subjectKeyIdentifier, encoding))
{
return ID_MATCH_PERFECT;
}
if (this->public_key &&
this->public_key->has_fingerprint(this->public_key, encoding))
{
return ID_MATCH_PERFECT;
}
if (chunk_equals(this->serialNumber, encoding))
{
return ID_MATCH_PERFECT;
}
}
best = this->subject->matches(this->subject, subject);
enumerator = this->subjectAltNames->create_enumerator(this->subjectAltNames);
while (enumerator->enumerate(enumerator, ¤t))
{
match = current->matches(current, subject);
if (match > best)
{
best = match;
}
}
enumerator->destroy(enumerator);
return best;
}
METHOD(certificate_t, has_issuer, id_match_t,
private_x509_cert_t *this, identification_t *issuer)
{
/* issuerAltNames currently not supported */
return this->issuer->matches(this->issuer, issuer);
}
METHOD(certificate_t, issued_by, bool,
private_x509_cert_t *this, certificate_t *issuer,
signature_params_t **scheme)
{
public_key_t *key;
bool valid;
x509_t *x509 = (x509_t*)issuer;
if (&this->public.interface.interface == issuer)
{
if (this->flags & X509_SELF_SIGNED)
{
if (scheme)
{
*scheme = signature_params_clone(this->scheme);
}
return TRUE;
}
}
else
{
if (issuer->get_type(issuer) != CERT_X509)
{
return FALSE;
}
if (!(x509->get_flags(x509) & X509_CA))
{
return FALSE;
}
}
if (!this->issuer->equals(this->issuer, issuer->get_subject(issuer)))
{
return FALSE;
}
/* get the public key of the issuer */
key = issuer->get_public_key(issuer);
if (!key)
{
return FALSE;
}
valid = key->verify(key, this->scheme->scheme, this->scheme->params,
this->tbsCertificate, this->signature);
key->destroy(key);
if (valid && scheme)
{
*scheme = signature_params_clone(this->scheme);
}
return valid;
}
METHOD(certificate_t, get_public_key, public_key_t*,
private_x509_cert_t *this)
{
this->public_key->get_ref(this->public_key);
return this->public_key;
}
METHOD(certificate_t, get_ref, certificate_t*,
private_x509_cert_t *this)
{
ref_get(&this->ref);
return &this->public.interface.interface;
}
METHOD(certificate_t, get_validity, bool,
private_x509_cert_t *this, time_t *when, time_t *not_before,
time_t *not_after)
{
time_t t = when ? *when : time(NULL);
if (not_before)
{
*not_before = this->notBefore;
}
if (not_after)
{
*not_after = this->notAfter;
}
return (t >= this->notBefore && t <= this->notAfter);
}
METHOD(certificate_t, get_encoding, bool,
private_x509_cert_t *this, cred_encoding_type_t type, chunk_t *encoding)
{
if (type == CERT_ASN1_DER)
{
*encoding = chunk_clone(this->encoding);
return TRUE;
}
return lib->encoding->encode(lib->encoding, type, NULL, encoding,
CRED_PART_X509_ASN1_DER, this->encoding, CRED_PART_END);
}
METHOD(certificate_t, equals, bool,
private_x509_cert_t *this, certificate_t *other)
{
chunk_t encoding;
bool equal;
if (this == (private_x509_cert_t*)other)
{
return TRUE;
}
if (other->get_type(other) != CERT_X509)
{
return FALSE;
}
if (other->equals == (void*)equals)
{ /* skip allocation if we have the same implementation */
return chunk_equals(this->encoding, ((private_x509_cert_t*)other)->encoding);
}
if (!other->get_encoding(other, CERT_ASN1_DER, &encoding))
{
return FALSE;
}
equal = chunk_equals(this->encoding, encoding);
free(encoding.ptr);
return equal;
}
METHOD(x509_t, get_flags, x509_flag_t,
private_x509_cert_t *this)
{
return this->flags;
}
METHOD(x509_t, get_serial, chunk_t,
private_x509_cert_t *this)
{
return this->serialNumber;
}
METHOD(x509_t, get_subjectKeyIdentifier, chunk_t,
private_x509_cert_t *this)
{
if (this->subjectKeyIdentifier.ptr)
{
return this->subjectKeyIdentifier;
}
else
{
chunk_t fingerprint;
if (this->public_key->get_fingerprint(this->public_key,
KEYID_PUBKEY_SHA1, &fingerprint))
{
return fingerprint;
}
else
{
return chunk_empty;
}
}
}
METHOD(x509_t, get_authKeyIdentifier, chunk_t,
private_x509_cert_t *this)
{
return this->authKeyIdentifier;
}
METHOD(x509_t, get_constraint, u_int,
private_x509_cert_t *this, x509_constraint_t type)
{
switch (type)
{
case X509_PATH_LEN:
return this->pathLenConstraint;
case X509_REQUIRE_EXPLICIT_POLICY:
return this->require_explicit;
case X509_INHIBIT_POLICY_MAPPING:
return this->inhibit_mapping;
case X509_INHIBIT_ANY_POLICY:
return this->inhibit_any;
default:
return X509_NO_CONSTRAINT;
}
}
METHOD(x509_t, create_subjectAltName_enumerator, enumerator_t*,
private_x509_cert_t *this)
{
return this->subjectAltNames->create_enumerator(this->subjectAltNames);
}
METHOD(x509_t, create_ocsp_uri_enumerator, enumerator_t*,
private_x509_cert_t *this)
{
return this->ocsp_uris->create_enumerator(this->ocsp_uris);
}
METHOD(x509_t, create_crl_uri_enumerator, enumerator_t*,
private_x509_cert_t *this)
{
return this->crl_uris->create_enumerator(this->crl_uris);
}
METHOD(x509_t, create_ipAddrBlock_enumerator, enumerator_t*,
private_x509_cert_t *this)
{
return this->ipAddrBlocks->create_enumerator(this->ipAddrBlocks);
}
METHOD(x509_t, create_name_constraint_enumerator, enumerator_t*,
private_x509_cert_t *this, bool perm)
{
if (perm)
{
return this->permitted_names->create_enumerator(this->permitted_names);
}
return this->excluded_names->create_enumerator(this->excluded_names);
}
METHOD(x509_t, create_cert_policy_enumerator, enumerator_t*,
private_x509_cert_t *this)
{
return this->cert_policies->create_enumerator(this->cert_policies);
}
METHOD(x509_t, create_policy_mapping_enumerator, enumerator_t*,
private_x509_cert_t *this)
{
return this->policy_mappings->create_enumerator(this->policy_mappings);
}
METHOD(certificate_t, destroy, void,
private_x509_cert_t *this)
{
if (ref_put(&this->ref))
{
this->subjectAltNames->destroy_offset(this->subjectAltNames,
offsetof(identification_t, destroy));
this->crl_uris->destroy_function(this->crl_uris,
(void*)x509_cdp_destroy);
this->ocsp_uris->destroy_function(this->ocsp_uris, free);
this->ipAddrBlocks->destroy_offset(this->ipAddrBlocks,
offsetof(traffic_selector_t, destroy));
this->permitted_names->destroy_offset(this->permitted_names,
offsetof(identification_t, destroy));
this->excluded_names->destroy_offset(this->excluded_names,
offsetof(identification_t, destroy));
this->cert_policies->destroy_function(this->cert_policies,
(void*)cert_policy_destroy);
this->policy_mappings->destroy_function(this->policy_mappings,
(void*)policy_mapping_destroy);
signature_params_destroy(this->scheme);
DESTROY_IF(this->issuer);
DESTROY_IF(this->subject);
DESTROY_IF(this->public_key);
chunk_free(&this->authKeyIdentifier);
chunk_free(&this->encoding);
chunk_free(&this->encoding_hash);
chunk_free(&this->critical_extension_oid);
if (!this->parsed)
{ /* only parsed certificates point these fields to "encoded" */
chunk_free(&this->signature);
chunk_free(&this->serialNumber);
chunk_free(&this->tbsCertificate);
}
free(this);
}
}
/**
* create an empty but initialized X.509 certificate
*/
static private_x509_cert_t* create_empty(void)
{
private_x509_cert_t *this;
INIT(this,
.public = {
.interface = {
.interface = {
.get_type = _get_type,
.get_subject = _get_subject,
.get_issuer = _get_issuer,
.has_subject = _has_subject,
.has_issuer = _has_issuer,
.issued_by = _issued_by,
.get_public_key = _get_public_key,
.get_validity = _get_validity,
.get_encoding = _get_encoding,
.equals = _equals,
.get_ref = _get_ref,
.destroy = _destroy,
},
.get_flags = _get_flags,
.get_serial = _get_serial,
.get_subjectKeyIdentifier = _get_subjectKeyIdentifier,
.get_authKeyIdentifier = _get_authKeyIdentifier,
.get_constraint = _get_constraint,
.create_subjectAltName_enumerator = _create_subjectAltName_enumerator,
.create_crl_uri_enumerator = _create_crl_uri_enumerator,
.create_ocsp_uri_enumerator = _create_ocsp_uri_enumerator,
.create_ipAddrBlock_enumerator = _create_ipAddrBlock_enumerator,
.create_name_constraint_enumerator = _create_name_constraint_enumerator,
.create_cert_policy_enumerator = _create_cert_policy_enumerator,
.create_policy_mapping_enumerator = _create_policy_mapping_enumerator,
},
},
.version = 1,
.subjectAltNames = linked_list_create(),
.crl_uris = linked_list_create(),
.ocsp_uris = linked_list_create(),
.ipAddrBlocks = linked_list_create(),
.permitted_names = linked_list_create(),
.excluded_names = linked_list_create(),
.cert_policies = linked_list_create(),
.policy_mappings = linked_list_create(),
.pathLenConstraint = X509_NO_CONSTRAINT,
.require_explicit = X509_NO_CONSTRAINT,
.inhibit_mapping = X509_NO_CONSTRAINT,
.inhibit_any = X509_NO_CONSTRAINT,
.ref = 1,
);
return this;
}
/**
* Build a generalName from an id
*/
chunk_t build_generalName(identification_t *id)
{
int context;
switch (id->get_type(id))
{
case ID_DER_ASN1_GN:
return chunk_clone(id->get_encoding(id));
case ID_RFC822_ADDR:
context = ASN1_CONTEXT_S_1;
break;
case ID_FQDN:
context = ASN1_CONTEXT_S_2;
break;
case ID_DER_ASN1_DN:
context = ASN1_CONTEXT_C_4;
break;
case ID_IPV4_ADDR:
case ID_IPV6_ADDR:
context = ASN1_CONTEXT_S_7;
break;
default:
DBG1(DBG_ASN, "encoding %N as generalName not supported",
id_type_names, id->get_type(id));
return chunk_empty;
}
return asn1_wrap(context, "c", id->get_encoding(id));
}
/**
* Encode a linked list of subjectAltNames
*/
chunk_t x509_build_subjectAltNames(linked_list_t *list)
{
chunk_t subjectAltNames = chunk_empty, name;
enumerator_t *enumerator;
identification_t *id;
if (list->get_count(list) == 0)
{
return chunk_empty;
}
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &id))
{
name = build_generalName(id);
subjectAltNames = chunk_cat("mm", subjectAltNames, name);
}
enumerator->destroy(enumerator);
return asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_SUBJECT_ALT_NAME),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "m", subjectAltNames)
)
);
}
/**
* Encode CRL distribution points extension from a x509_cdp_t list
*/
chunk_t x509_build_crlDistributionPoints(linked_list_t *list, int extn)
{
chunk_t crlDistributionPoints = chunk_empty;
enumerator_t *enumerator;
x509_cdp_t *cdp;
if (list->get_count(list) == 0)
{
return chunk_empty;
}
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &cdp))
{
chunk_t distributionPoint, crlIssuer = chunk_empty;
if (cdp->issuer)
{
crlIssuer = asn1_wrap(ASN1_CONTEXT_C_2, "m",
build_generalName(cdp->issuer));
}
distributionPoint = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_CONTEXT_C_0, "m",
asn1_wrap(ASN1_CONTEXT_C_0, "m",
asn1_wrap(ASN1_CONTEXT_S_6, "c",
chunk_create(cdp->uri, strlen(cdp->uri))))),
crlIssuer);
crlDistributionPoints = chunk_cat("mm", crlDistributionPoints,
distributionPoint);
}
enumerator->destroy(enumerator);
return asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(extn),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "m", crlDistributionPoints)));
}
static chunk_t generate_ts(traffic_selector_t *ts)
{
chunk_t from, to;
uint8_t minbits = 0, maxbits = 0, unused;
host_t *net;
int bit, byte;
if (ts->to_subnet(ts, &net, &minbits))
{
unused = round_up(minbits, BITS_PER_BYTE) - minbits;
from = asn1_wrap(ASN1_BIT_STRING, "m",
chunk_cat("cc", chunk_from_thing(unused),
chunk_create(net->get_address(net).ptr,
(minbits + unused) / BITS_PER_BYTE)));
net->destroy(net);
return from;
}
net->destroy(net);
from = ts->get_from_address(ts);
for (byte = from.len - 1; byte >= 0; byte--)
{
if (from.ptr[byte] != 0)
{
minbits = byte * BITS_PER_BYTE + BITS_PER_BYTE;
for (bit = 0; bit < BITS_PER_BYTE; bit++)
{
if (from.ptr[byte] & 1 << bit)
{
break;
}
minbits--;
}
break;
}
}
to = ts->get_to_address(ts);
for (byte = to.len - 1; byte >= 0; byte--)
{
if (to.ptr[byte] != 0xFF)
{
maxbits = byte * BITS_PER_BYTE + BITS_PER_BYTE;
for (bit = 0; bit < BITS_PER_BYTE; bit++)
{
if ((to.ptr[byte] & 1 << bit) == 0)
{
break;
}
maxbits--;
}
break;
}
}
unused = round_up(minbits, BITS_PER_BYTE) - minbits;
from = asn1_wrap(ASN1_BIT_STRING, "m",
chunk_cat("cc", chunk_from_thing(unused),
chunk_create(from.ptr,
(minbits + unused) / BITS_PER_BYTE)));
unused = round_up(maxbits, BITS_PER_BYTE) - maxbits;
to = asn1_wrap(ASN1_BIT_STRING, "m",
chunk_cat("cc", chunk_from_thing(unused),
chunk_create(to.ptr,
(maxbits + unused) / BITS_PER_BYTE)));
return asn1_wrap(ASN1_SEQUENCE, "mm", from, to);
}
/**
* Generate and sign a new certificate
*/
static bool generate(private_x509_cert_t *cert, certificate_t *sign_cert,
private_key_t *sign_key, int digest_alg)
{
const chunk_t keyUsageCrlSign = chunk_from_chars(0x01, 0x02);
const chunk_t keyUsageCertSignCrlSign = chunk_from_chars(0x01, 0x06);
chunk_t extensions = chunk_empty, extendedKeyUsage = chunk_empty;
chunk_t serverAuth = chunk_empty, clientAuth = chunk_empty;
chunk_t ocspSigning = chunk_empty, certPolicies = chunk_empty;
chunk_t basicConstraints = chunk_empty, nameConstraints = chunk_empty;
chunk_t keyUsage = chunk_empty, keyUsageBits = chunk_empty;
chunk_t subjectAltNames = chunk_empty, policyMappings = chunk_empty;
chunk_t subjectKeyIdentifier = chunk_empty, authKeyIdentifier = chunk_empty;
chunk_t crlDistributionPoints = chunk_empty, authorityInfoAccess = chunk_empty;
chunk_t policyConstraints = chunk_empty, inhibitAnyPolicy = chunk_empty;
chunk_t ikeIntermediate = chunk_empty, msSmartcardLogon = chunk_empty;
chunk_t ipAddrBlocks = chunk_empty, sig_scheme = chunk_empty;
chunk_t criticalExtension = chunk_empty;
identification_t *issuer, *subject;
chunk_t key_info;
hasher_t *hasher;
enumerator_t *enumerator;
char *uri;
subject = cert->subject;
if (sign_cert)
{
issuer = sign_cert->get_subject(sign_cert);
if (!cert->public_key)
{
return FALSE;
}
}
else
{ /* self signed */
issuer = subject;
if (!cert->public_key)
{
cert->public_key = sign_key->get_public_key(sign_key);
}
cert->flags |= X509_SELF_SIGNED;
}
cert->issuer = issuer->clone(issuer);
if (!cert->notBefore)
{
cert->notBefore = time(NULL);
}
if (!cert->notAfter)
{ /* defaults to 1 year from now */
cert->notAfter = cert->notBefore + 60 * 60 * 24 * 365;
}
/* select signature scheme, if not already specified */
if (!cert->scheme)
{
INIT(cert->scheme,
.scheme = signature_scheme_from_oid(
hasher_signature_algorithm_to_oid(digest_alg,
sign_key->get_type(sign_key))),
);
}
if (cert->scheme->scheme == SIGN_UNKNOWN)
{
return FALSE;
}
if (!signature_params_build(cert->scheme, &sig_scheme))
{
return FALSE;
}
if (!cert->public_key->get_encoding(cert->public_key,
PUBKEY_SPKI_ASN1_DER, &key_info))
{
chunk_free(&sig_scheme);
return FALSE;
}
/* encode subjectAltNames */
subjectAltNames = x509_build_subjectAltNames(cert->subjectAltNames);
crlDistributionPoints = x509_build_crlDistributionPoints(cert->crl_uris,
OID_CRL_DISTRIBUTION_POINTS);
/* encode OCSP URIs in authorityInfoAccess extension */
enumerator = cert->ocsp_uris->create_enumerator(cert->ocsp_uris);
while (enumerator->enumerate(enumerator, &uri))
{
chunk_t accessDescription;
accessDescription = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_OCSP),
asn1_wrap(ASN1_CONTEXT_S_6, "c",
chunk_create(uri, strlen(uri))));
authorityInfoAccess = chunk_cat("mm", authorityInfoAccess,
accessDescription);
}
enumerator->destroy(enumerator);
if (authorityInfoAccess.ptr)
{
authorityInfoAccess = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_AUTHORITY_INFO_ACCESS),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "m", authorityInfoAccess)));
}
/* build CA basicConstraint and keyUsage flags for CA certificates */
if (cert->flags & X509_CA)
{
chunk_t pathLenConstraint = chunk_empty;
if (cert->pathLenConstraint != X509_NO_CONSTRAINT)
{
pathLenConstraint = asn1_integer("c",
chunk_from_thing(cert->pathLenConstraint));
}
basicConstraints = asn1_wrap(ASN1_SEQUENCE, "mmm",
asn1_build_known_oid(OID_BASIC_CONSTRAINTS),
asn1_wrap(ASN1_BOOLEAN, "c",
chunk_from_chars(0xFF)),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_BOOLEAN, "c",
chunk_from_chars(0xFF)),
pathLenConstraint)));
/* set CertificateSign and implicitly CRLsign */
keyUsageBits = keyUsageCertSignCrlSign;
}
else if (cert->flags & X509_CRL_SIGN)
{
keyUsageBits = keyUsageCrlSign;
}
if (keyUsageBits.len)
{
keyUsage = asn1_wrap(ASN1_SEQUENCE, "mmm",
asn1_build_known_oid(OID_KEY_USAGE),
asn1_wrap(ASN1_BOOLEAN, "c", chunk_from_chars(0xFF)),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_BIT_STRING, "c", keyUsageBits)));
}
/* add extendedKeyUsage flags */
if (cert->flags & X509_SERVER_AUTH)
{
serverAuth = asn1_build_known_oid(OID_SERVER_AUTH);
}
if (cert->flags & X509_CLIENT_AUTH)
{
clientAuth = asn1_build_known_oid(OID_CLIENT_AUTH);
}
if (cert->flags & X509_IKE_INTERMEDIATE)
{
ikeIntermediate = asn1_build_known_oid(OID_IKE_INTERMEDIATE);
}
if (cert->flags & X509_OCSP_SIGNER)
{
ocspSigning = asn1_build_known_oid(OID_OCSP_SIGNING);
}
if (cert->flags & X509_MS_SMARTCARD_LOGON)
{
msSmartcardLogon = asn1_build_known_oid(OID_MS_SMARTCARD_LOGON);
}
if (serverAuth.ptr || clientAuth.ptr || ikeIntermediate.ptr ||
ocspSigning.ptr || msSmartcardLogon.ptr)
{
extendedKeyUsage = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_EXTENDED_KEY_USAGE),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "mmmmm",
serverAuth, clientAuth, ikeIntermediate,
ocspSigning, msSmartcardLogon)));
}
/* add subjectKeyIdentifier to CA and OCSP signer certificates */
if (cert->flags & (X509_CA | X509_OCSP_SIGNER | X509_CRL_SIGN))
{
chunk_t keyid;
if (cert->public_key->get_fingerprint(cert->public_key,
KEYID_PUBKEY_SHA1, &keyid))
{
subjectKeyIdentifier = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_SUBJECT_KEY_ID),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_OCTET_STRING, "c", keyid)));
}
}
/* add the keyid authKeyIdentifier for non self-signed certificates */
if (sign_cert)
{
chunk_t keyid;
if (sign_key->get_fingerprint(sign_key, KEYID_PUBKEY_SHA1, &keyid))
{
authKeyIdentifier = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_AUTHORITY_KEY_ID),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "m",
asn1_wrap(ASN1_CONTEXT_S_0, "c", keyid))));
}
}
if (cert->ipAddrBlocks->get_count(cert->ipAddrBlocks))
{
chunk_t v4blocks = chunk_empty, v6blocks = chunk_empty, block;
traffic_selector_t *ts;
enumerator = cert->ipAddrBlocks->create_enumerator(cert->ipAddrBlocks);
while (enumerator->enumerate(enumerator, &ts))
{
switch (ts->get_type(ts))
{
case TS_IPV4_ADDR_RANGE:
block = generate_ts(ts);
v4blocks = chunk_cat("mm", v4blocks, block);
break;
case TS_IPV6_ADDR_RANGE:
block = generate_ts(ts);
v6blocks = chunk_cat("mm", v6blocks, block);
break;
default:
break;
}
}
enumerator->destroy(enumerator);
if (v4blocks.ptr)
{
v4blocks = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_OCTET_STRING, "c",
chunk_from_chars(0x00,0x01)),
asn1_wrap(ASN1_SEQUENCE, "m", v4blocks));
}
if (v6blocks.ptr)
{
v6blocks = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_OCTET_STRING, "c",
chunk_from_chars(0x00,0x02)),
asn1_wrap(ASN1_SEQUENCE, "m", v6blocks));
}
ipAddrBlocks = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_IP_ADDR_BLOCKS),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "mm",
v4blocks, v6blocks)));
cert->flags |= X509_IP_ADDR_BLOCKS;
}
if (cert->permitted_names->get_count(cert->permitted_names) ||
cert->excluded_names->get_count(cert->excluded_names))
{
chunk_t permitted = chunk_empty, excluded = chunk_empty, subtree;
identification_t *id;
enumerator = create_name_constraint_enumerator(cert, TRUE);
while (enumerator->enumerate(enumerator, &id))
{
subtree = asn1_wrap(ASN1_SEQUENCE, "m", build_generalName(id));
permitted = chunk_cat("mm", permitted, subtree);
}
enumerator->destroy(enumerator);
if (permitted.ptr)
{
permitted = asn1_wrap(ASN1_CONTEXT_C_0, "m", permitted);
}
enumerator = create_name_constraint_enumerator(cert, FALSE);
while (enumerator->enumerate(enumerator, &id))
{
subtree = asn1_wrap(ASN1_SEQUENCE, "m", build_generalName(id));
excluded = chunk_cat("mm", excluded, subtree);
}
enumerator->destroy(enumerator);
if (excluded.ptr)
{
excluded = asn1_wrap(ASN1_CONTEXT_C_1, "m", excluded);
}
nameConstraints = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_NAME_CONSTRAINTS),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "mm",
permitted, excluded)));
}
if (cert->cert_policies->get_count(cert->cert_policies))
{
x509_cert_policy_t *policy;
enumerator = create_cert_policy_enumerator(cert);
while (enumerator->enumerate(enumerator, &policy))
{
chunk_t chunk = chunk_empty, cps = chunk_empty, notice = chunk_empty;
if (policy->cps_uri)
{
cps = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_POLICY_QUALIFIER_CPS),
asn1_wrap(ASN1_IA5STRING, "c",
chunk_create(policy->cps_uri,
strlen(policy->cps_uri))));
}
if (policy->unotice_text)
{
notice = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_POLICY_QUALIFIER_UNOTICE),
asn1_wrap(ASN1_SEQUENCE, "m",
asn1_wrap(ASN1_VISIBLESTRING, "c",
chunk_create(policy->unotice_text,
strlen(policy->unotice_text)))));
}
if (cps.len || notice.len)
{
chunk = asn1_wrap(ASN1_SEQUENCE, "mm", cps, notice);
}
chunk = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_OID, "c", policy->oid), chunk);
certPolicies = chunk_cat("mm", certPolicies, chunk);
}
enumerator->destroy(enumerator);
certPolicies = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_CERTIFICATE_POLICIES),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "m", certPolicies)));
}
if (cert->policy_mappings->get_count(cert->policy_mappings))
{
x509_policy_mapping_t *mapping;
enumerator = create_policy_mapping_enumerator(cert);
while (enumerator->enumerate(enumerator, &mapping))
{
chunk_t chunk;
chunk = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_OID, "c", mapping->issuer),
asn1_wrap(ASN1_OID, "c", mapping->subject));
policyMappings = chunk_cat("mm", policyMappings, chunk);
}
enumerator->destroy(enumerator);
policyMappings = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_POLICY_MAPPINGS),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "m", policyMappings)));
}
if (cert->inhibit_mapping != X509_NO_CONSTRAINT ||
cert->require_explicit != X509_NO_CONSTRAINT)
{
chunk_t inhibit = chunk_empty, explicit = chunk_empty;
if (cert->require_explicit != X509_NO_CONSTRAINT)
{
explicit = asn1_wrap(ASN1_CONTEXT_C_0, "m",
asn1_integer("c",
chunk_from_thing(cert->require_explicit)));
}
if (cert->inhibit_mapping != X509_NO_CONSTRAINT)
{
inhibit = asn1_wrap(ASN1_CONTEXT_C_1, "m",
asn1_integer("c",
chunk_from_thing(cert->inhibit_mapping)));
}
policyConstraints = asn1_wrap(ASN1_SEQUENCE, "mmm",
asn1_build_known_oid(OID_POLICY_CONSTRAINTS),
asn1_wrap(ASN1_BOOLEAN, "c", chunk_from_chars(0xFF)),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_wrap(ASN1_SEQUENCE, "mm",
explicit, inhibit)));
}
if (cert->inhibit_any != X509_NO_CONSTRAINT)
{
inhibitAnyPolicy = asn1_wrap(ASN1_SEQUENCE, "mmm",
asn1_build_known_oid(OID_INHIBIT_ANY_POLICY),
asn1_wrap(ASN1_BOOLEAN, "c", chunk_from_chars(0xFF)),
asn1_wrap(ASN1_OCTET_STRING, "m",
asn1_integer("c",
chunk_from_thing(cert->inhibit_any))));
}
if (cert->critical_extension_oid.len > 0)
{
criticalExtension = asn1_wrap(ASN1_SEQUENCE, "mmm",
asn1_simple_object(ASN1_OID, cert->critical_extension_oid),
asn1_simple_object(ASN1_BOOLEAN, chunk_from_chars(0xFF)),
asn1_simple_object(ASN1_OCTET_STRING, chunk_empty));
}
if (basicConstraints.ptr || subjectAltNames.ptr || authKeyIdentifier.ptr ||
crlDistributionPoints.ptr || nameConstraints.ptr || ipAddrBlocks.ptr)
{
extensions = asn1_wrap(ASN1_CONTEXT_C_3, "m",
asn1_wrap(ASN1_SEQUENCE, "mmmmmmmmmmmmmmm",
basicConstraints, keyUsage, subjectKeyIdentifier,
authKeyIdentifier, subjectAltNames,
extendedKeyUsage, crlDistributionPoints,
authorityInfoAccess, nameConstraints, certPolicies,
policyMappings, policyConstraints, inhibitAnyPolicy,
ipAddrBlocks, criticalExtension));
}
cert->tbsCertificate = asn1_wrap(ASN1_SEQUENCE, "mmccmcmm",
asn1_simple_object(ASN1_CONTEXT_C_0, ASN1_INTEGER_2),
asn1_integer("c", cert->serialNumber),
sig_scheme,
issuer->get_encoding(issuer),
asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_from_time(&cert->notBefore, ASN1_UTCTIME),
asn1_from_time(&cert->notAfter, ASN1_UTCTIME)),
subject->get_encoding(subject),
key_info, extensions);
if (!sign_key->sign(sign_key, cert->scheme->scheme, cert->scheme->params,
cert->tbsCertificate, &cert->signature))
{
chunk_free(&sig_scheme);
return FALSE;
}
cert->encoding = asn1_wrap(ASN1_SEQUENCE, "cmm", cert->tbsCertificate,
sig_scheme,
asn1_bitstring("c", cert->signature));
hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (!hasher ||
!hasher->allocate_hash(hasher, cert->encoding, &cert->encoding_hash))
{
DESTROY_IF(hasher);
return FALSE;
}
hasher->destroy(hasher);
return TRUE;
}
/**
* See header.
*/
x509_cert_t *x509_cert_load(certificate_type_t type, va_list args)
{
x509_flag_t flags = 0;
chunk_t blob = chunk_empty;
while (TRUE)
{
switch (va_arg(args, builder_part_t))
{
case BUILD_BLOB_ASN1_DER:
blob = va_arg(args, chunk_t);
continue;
case BUILD_X509_FLAG:
flags |= va_arg(args, x509_flag_t);
continue;
case BUILD_END:
break;
default:
return NULL;
}
break;
}
if (blob.ptr)
{
private_x509_cert_t *cert = create_empty();
cert->encoding = chunk_clone(blob);
cert->parsed = TRUE;
if (parse_certificate(cert))
{
cert->flags |= flags;
return &cert->public;
}
destroy(cert);
}
return NULL;
}
/**
* See header.
*/
x509_cert_t *x509_cert_gen(certificate_type_t type, va_list args)
{
private_x509_cert_t *cert;
certificate_t *sign_cert = NULL;
private_key_t *sign_key = NULL;
hash_algorithm_t digest_alg = HASH_SHA256;
u_int constraint;
cert = create_empty();
while (TRUE)
{
switch (va_arg(args, builder_part_t))
{
case BUILD_X509_FLAG:
cert->flags |= va_arg(args, x509_flag_t);
continue;
case BUILD_SIGNING_KEY:
sign_key = va_arg(args, private_key_t*);
continue;
case BUILD_SIGNING_CERT:
sign_cert = va_arg(args, certificate_t*);
continue;
case BUILD_PUBLIC_KEY:
cert->public_key = va_arg(args, public_key_t*);
cert->public_key->get_ref(cert->public_key);
continue;
case BUILD_SUBJECT:
cert->subject = va_arg(args, identification_t*);
cert->subject = cert->subject->clone(cert->subject);
continue;
case BUILD_SUBJECT_ALTNAMES:
{
enumerator_t *enumerator;
identification_t *id;
linked_list_t *list;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &id))
{
cert->subjectAltNames->insert_last(cert->subjectAltNames,
id->clone(id));
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_CRL_DISTRIBUTION_POINTS:
{
enumerator_t *enumerator;
linked_list_t *list;
x509_cdp_t *in, *cdp;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &in))
{
INIT(cdp,
.uri = strdup(in->uri),
.issuer = in->issuer ? in->issuer->clone(in->issuer) : NULL,
);
cert->crl_uris->insert_last(cert->crl_uris, cdp);
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_OCSP_ACCESS_LOCATIONS:
{
enumerator_t *enumerator;
linked_list_t *list;
char *uri;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &uri))
{
cert->ocsp_uris->insert_last(cert->ocsp_uris, strdup(uri));
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_PATHLEN:
constraint = va_arg(args, u_int);
cert->pathLenConstraint = (constraint < 128) ?
constraint : X509_NO_CONSTRAINT;
continue;
case BUILD_ADDRBLOCKS:
{
enumerator_t *enumerator;
traffic_selector_t *ts;
linked_list_t *list;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &ts))
{
cert->ipAddrBlocks->insert_last(cert->ipAddrBlocks,
ts->clone(ts));
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_PERMITTED_NAME_CONSTRAINTS:
{
enumerator_t *enumerator;
linked_list_t *list;
identification_t *constraint;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &constraint))
{
cert->permitted_names->insert_last(cert->permitted_names,
constraint->clone(constraint));
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_EXCLUDED_NAME_CONSTRAINTS:
{
enumerator_t *enumerator;
linked_list_t *list;
identification_t *constraint;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &constraint))
{
cert->excluded_names->insert_last(cert->excluded_names,
constraint->clone(constraint));
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_CERTIFICATE_POLICIES:
{
enumerator_t *enumerator;
linked_list_t *list;
x509_cert_policy_t *policy, *in;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &in))
{
INIT(policy,
.oid = chunk_clone(in->oid),
.cps_uri = strdupnull(in->cps_uri),
.unotice_text = strdupnull(in->unotice_text),
);
cert->cert_policies->insert_last(cert->cert_policies, policy);
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_POLICY_MAPPINGS:
{
enumerator_t *enumerator;
linked_list_t *list;
x509_policy_mapping_t* mapping, *in;
list = va_arg(args, linked_list_t*);
enumerator = list->create_enumerator(list);
while (enumerator->enumerate(enumerator, &in))
{
INIT(mapping,
.issuer = chunk_clone(in->issuer),
.subject = chunk_clone(in->subject),
);
cert->policy_mappings->insert_last(cert->policy_mappings,
mapping);
}
enumerator->destroy(enumerator);
continue;
}
case BUILD_POLICY_REQUIRE_EXPLICIT:
constraint = va_arg(args, u_int);
cert->require_explicit = (constraint < 128) ?
constraint : X509_NO_CONSTRAINT;
continue;
case BUILD_POLICY_INHIBIT_MAPPING:
constraint = va_arg(args, u_int);
cert->inhibit_mapping = (constraint < 128) ?
constraint : X509_NO_CONSTRAINT;
continue;
case BUILD_POLICY_INHIBIT_ANY:
constraint = va_arg(args, u_int);
cert->inhibit_any = (constraint < 128) ?
constraint : X509_NO_CONSTRAINT;
continue;
case BUILD_NOT_BEFORE_TIME:
cert->notBefore = va_arg(args, time_t);
continue;
case BUILD_NOT_AFTER_TIME:
cert->notAfter = va_arg(args, time_t);
continue;
case BUILD_SERIAL:
cert->serialNumber = chunk_clone(va_arg(args, chunk_t));
continue;
case BUILD_SIGNATURE_SCHEME:
cert->scheme = va_arg(args, signature_params_t*);
cert->scheme = signature_params_clone(cert->scheme);
continue;
case BUILD_DIGEST_ALG:
digest_alg = va_arg(args, int);
continue;
case BUILD_CRITICAL_EXTENSION:
cert->critical_extension_oid = chunk_clone(va_arg(args, chunk_t));
continue;
case BUILD_END:
break;
default:
destroy(cert);
return NULL;
}
break;
}
if (sign_key && generate(cert, sign_cert, sign_key, digest_alg))
{
return &cert->public;
}
destroy(cert);
return NULL;
}
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