/* * Copyright (C) 2000 Andreas Hess, Patric Lichtsteiner, Roger Wegmann * Copyright (C) 2001 Marco Bertossa, Andreas Schleiss * Copyright (C) 2002 Mario Strasser * Copyright (C) 2000-2006 Andreas Steffen * Copyright (C) 2006-2009 Martin Willi * Copyright (C) 2008 Tobias Brunner * 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 . * * 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 #include #include #include #include #include "x509_cert.h" #include #include #include #include #include #include #include #include #include #include /** * 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 exluced 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; /** * 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 algorithm */ int algorithm; /** * Signature */ chunk_t signature; /** * Certificate parsed from blob/file? */ bool parsed; /** * reference count */ refcount_t ref; }; /** * Destroy a CertificateDistributionPoint */ static void crl_uri_destroy(x509_cdp_t *this) { free(this->uri); DESTROY_IF(this->issuer); free(this); } /** * 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 void parse_basicConstraints(chunk_t blob, int level0, private_x509_cert_t *this) { asn1_parser_t *parser; chunk_t object; int objectID; bool isCA = FALSE; 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; } } parser->destroy(parser); } /** * 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")) { 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 */ void x509_parse_generalNames(chunk_t blob, int level0, bool implicit, linked_list_t *list) { asn1_parser_t *parser; chunk_t object; int objectID; 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) { identification_t *gn = parse_generalName(object, parser->get_level(parser)+1); if (gn) { list->insert_last(list, (void *)gn); } } } parser->destroy(parser); } /** * 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 void 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; 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 && asprintf(&uri, "%Y", id) > 0) { this->ocsp_uris->insert_last(this->ocsp_uris, uri); } id->destroy(id); } break; default: /* unknown accessMethod, ignoring */ break; } break; } default: break; } } end: parser->destroy(parser); } /** * 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, }; 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_KEY_CERT_SIGN: /* we use the caBasicConstraint, MUST be set */ case KU_DIGITAL_SIGNATURE: case KU_NON_REPUDIATION: 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 void parse_extendedKeyUsage(chunk_t blob, int level0, private_x509_cert_t *this) { asn1_parser_t *parser; chunk_t object; int objectID; 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; } } } parser->destroy(parser); } /** * 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_LOOP }, /* 2 */ { 3, "fullName", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_OBJ }, /* 3 */ { 3, "end choice", ASN1_EOC, ASN1_END }, /* 4 */ { 3, "nameRelToCRLIssuer",ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_BODY }, /* 5 */ { 3, "end choice", ASN1_EOC, ASN1_END }, /* 6 */ { 2, "end opt", ASN1_EOC, ASN1_END }, /* 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 (asprintf(&uri, "%Y", id) > 0) { 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 */ void 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; 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: x509_parse_generalNames(object, parser->get_level(parser) + 1, TRUE, uris); break; case CRL_DIST_POINTS_ISSUER: x509_parse_generalNames(object, parser->get_level(parser) + 1, TRUE, issuers); break; default: break; } } parser->destroy(parser); add_cdps(list, uris, issuers); uris->destroy(uris); issuers->destroy(issuers); } /** * ASN.1 definition of nameConstraints */ static const asn1Object_t nameConstraintsObjects[] = { { 0, "nameConstraints", ASN1_SEQUENCE, ASN1_LOOP }, /* 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, "end loop", ASN1_EOC, ASN1_END }, /* 7 */ { 0, "exit", ASN1_EOC, ASN1_EXIT } }; #define NAME_CONSTRAINT_PERMITTED 2 #define NAME_CONSTRAINT_EXCLUDED 5 /** * Parse permitted/excluded nameConstraints */ static void parse_nameConstraints(chunk_t blob, int level0, private_x509_cert_t *this) { asn1_parser_t *parser; identification_t *id; chunk_t object; int objectID; 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) { 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) { this->excluded_names->insert_last(this->excluded_names, id); } break; default: break; } } parser->destroy(parser); } /** * 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, "cPSuri", ASN1_IA5STRING, ASN1_OPT|ASN1_BODY }, /* 6 */ { 4, "end choice", ASN1_EOC, ASN1_END }, /* 7 */ { 4, "userNotice", ASN1_SEQUENCE, ASN1_OPT|ASN1_BODY }, /* 8 */ { 5, "explicitText", ASN1_EOC, ASN1_RAW }, /* 9 */ { 4, "end choice", ASN1_EOC, ASN1_END }, /* 10 */ { 2, "end opt/loop", ASN1_EOC, ASN1_END }, /* 12 */ { 0, "end loop", ASN1_EOC, ASN1_END }, /* 13 */ { 0, "exit", ASN1_EOC, ASN1_EXIT } }; #define CERT_POLICY_ID 2 #define CERT_POLICY_QUALIFIER_ID 5 #define CERT_POLICY_CPS_URI 6 #define CERT_POLICY_EXPLICIT_TEXT 9 /** * Parse certificatePolicies */ static void 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; 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; } } parser->destroy(parser); } /** * 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 void 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; 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; } } parser->destroy(parser); } /** * 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 void parse_policyConstraints(chunk_t blob, int level0, private_x509_cert_t *this) { asn1_parser_t *parser; chunk_t object; int objectID; 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; } } parser->destroy(parser); } /** * 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, "inherit", ASN1_NULL, ASN1_OPT|ASN1_NONE }, /* 3 */ { 2, "end choice", ASN1_EOC, ASN1_END }, /* 4 */ { 2, "addressesOrRanges", ASN1_SEQUENCE, ASN1_OPT|ASN1_LOOP }, /* 5 */ { 3, "addressPrefix", ASN1_BIT_STRING, ASN1_OPT|ASN1_BODY }, /* 6 */ { 3, "end choice", ASN1_EOC, ASN1_END }, /* 7 */ { 3, "addressRange", ASN1_SEQUENCE, ASN1_OPT|ASN1_NONE }, /* 8 */ { 4, "min", ASN1_BIT_STRING, ASN1_BODY }, /* 9 */ { 4, "max", ASN1_BIT_STRING, ASN1_BODY }, /* 10 */ { 3, "end choice", ASN1_EOC, ASN1_END }, /* 11 */ { 2, "end opt/loop", ASN1_EOC, ASN1_END }, /* 12 */ { 0, "end loop", ASN1_EOC, ASN1_END }, /* 13 */ { 0, "exit", ASN1_EOC, ASN1_EXIT } }; #define IP_ADDR_BLOCKS_FAMILY 2 #define IP_ADDR_BLOCKS_INHERIT 3 #define IP_ADDR_BLOCKS_PREFIX 6 #define IP_ADDR_BLOCKS_MIN 9 #define IP_ADDR_BLOCKS_MAX 10 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 void 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; 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; } } this->flags |= X509_IP_ADDR_BLOCKS; end: parser->destroy(parser); } /** * 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; int sig_alg = OID_UNKNOWN; bool success = FALSE; bool critical = FALSE; parser = asn1_parser_create(certObjects, this->encoding); 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: sig_alg = asn1_parse_algorithmIdentifier(object, level, NULL); 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: x509_parse_generalNames(object, level, FALSE, this->subjectAltNames); break; case OID_BASIC_CONSTRAINTS: parse_basicConstraints(object, level, this); break; case OID_CRL_DISTRIBUTION_POINTS: x509_parse_crlDistributionPoints(object, level, this->crl_uris); break; case OID_AUTHORITY_KEY_ID: this->authKeyIdentifier = x509_parse_authorityKeyIdentifier(object, level, &this->authKeySerialNumber); break; case OID_AUTHORITY_INFO_ACCESS: parse_authorityInfoAccess(object, level, this); break; case OID_KEY_USAGE: parse_keyUsage(object, this); break; case OID_EXTENDED_KEY_USAGE: parse_extendedKeyUsage(object, level, this); break; case OID_IP_ADDR_BLOCKS: parse_ipAddrBlocks(object, level, this); break; case OID_NAME_CONSTRAINTS: parse_nameConstraints(object, level, this); break; case OID_CERTIFICATE_POLICIES: parse_certificatePolicies(object, level, this); break; case OID_POLICY_MAPPINGS: parse_policyMappings(object, level, this); break; case OID_POLICY_CONSTRAINTS: parse_policyConstraints(object, level, this); 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: this->algorithm = asn1_parse_algorithmIdentifier(object, level, NULL); if (this->algorithm != 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); 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_scheme_t *schemep) { public_key_t *key; signature_scheme_t scheme; bool valid; x509_t *x509 = (x509_t*)issuer; if (&this->public.interface.interface == issuer) { if (this->flags & X509_SELF_SIGNED) { 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; } /* determine signature scheme */ scheme = signature_scheme_from_oid(this->algorithm); if (scheme == SIGN_UNKNOWN) { return FALSE; } /* get the public key of the issuer */ key = issuer->get_public_key(issuer); if (!key) { return FALSE; } valid = key->verify(key, scheme, this->tbsCertificate, this->signature); key->destroy(key); if (valid && schemep) { *schemep = 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*)crl_uri_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); 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); 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_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) { 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; identification_t *issuer, *subject; chunk_t key_info; signature_scheme_t scheme; 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 */ cert->algorithm = hasher_signature_algorithm_to_oid(digest_alg, sign_key->get_type(sign_key)); if (cert->algorithm == OID_UNKNOWN) { return FALSE; } scheme = signature_scheme_from_oid(cert->algorithm); if (!cert->public_key->get_encoding(cert->public_key, PUBKEY_SPKI_ASN1_DER, &key_info)) { 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 = chunk_from_chars(0x01, 0x06); } else if (cert->flags & X509_CRL_SIGN) { keyUsageBits = chunk_from_chars(0x01, 0x02); } 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 (basicConstraints.ptr || subjectAltNames.ptr || authKeyIdentifier.ptr || crlDistributionPoints.ptr || nameConstraints.ptr || ipAddrBlocks.ptr) { extensions = asn1_wrap(ASN1_CONTEXT_C_3, "m", asn1_wrap(ASN1_SEQUENCE, "mmmmmmmmmmmmmm", basicConstraints, keyUsage, subjectKeyIdentifier, authKeyIdentifier, subjectAltNames, extendedKeyUsage, crlDistributionPoints, authorityInfoAccess, nameConstraints, certPolicies, policyMappings, policyConstraints, inhibitAnyPolicy, ipAddrBlocks)); } cert->tbsCertificate = asn1_wrap(ASN1_SEQUENCE, "mmmcmcmm", asn1_simple_object(ASN1_CONTEXT_C_0, ASN1_INTEGER_2), asn1_integer("c", cert->serialNumber), asn1_algorithmIdentifier(cert->algorithm), 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, scheme, cert->tbsCertificate, &cert->signature)) { return FALSE; } cert->encoding = asn1_wrap(ASN1_SEQUENCE, "cmm", cert->tbsCertificate, asn1_algorithmIdentifier(cert->algorithm), 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_SHA1; 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_DIGEST_ALG: digest_alg = va_arg(args, int); 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; }