diff options
Diffstat (limited to 'src/pluto/crl.c')
| -rw-r--r-- | src/pluto/crl.c | 1197 |
1 files changed, 599 insertions, 598 deletions
diff --git a/src/pluto/crl.c b/src/pluto/crl.c index c891d19e6..c800f2acc 100644 --- a/src/pluto/crl.c +++ b/src/pluto/crl.c @@ -1,5 +1,7 @@ /* Support of X.509 certificate revocation lists (CRLs) - * Copyright (C) 2000-2004 Andreas Steffen, Zuercher Hochschule Winterthur + * Copyright (C) 2000-2009 Andreas Steffen + * + * 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 @@ -10,8 +12,6 @@ * 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. - * - * RCSID $Id: crl.c 4632 2008-11-11 18:37:19Z martin $ */ #include <stdlib.h> @@ -23,13 +23,15 @@ #include <sys/types.h> #include <freeswan.h> -#include <ipsec_policy.h> + +#include <asn1/asn1.h> +#include <asn1/asn1_parser.h> +#include <asn1/oid.h> +#include <crypto/hashers/hasher.h> #include "constants.h" #include "defs.h" #include "log.h" -#include "asn1.h" -#include <asn1/oid.h> #include "x509.h" #include "crl.h" #include "ca.h" @@ -37,482 +39,482 @@ #include "keys.h" #include "whack.h" #include "fetch.h" -#include "sha1.h" + /* chained lists of X.509 crls */ static x509crl_t *x509crls = NULL; -/* ASN.1 definition of an X.509 certificate list */ - +/** + * ASN.1 definition of an X.509 certificate revocation list + */ static const asn1Object_t crlObjects[] = { - { 0, "certificateList", ASN1_SEQUENCE, ASN1_OBJ }, /* 0 */ - { 1, "tbsCertList", ASN1_SEQUENCE, ASN1_OBJ }, /* 1 */ - { 2, "version", ASN1_INTEGER, ASN1_OPT | - ASN1_BODY }, /* 2 */ - { 2, "end opt", ASN1_EOC, ASN1_END }, /* 3 */ - { 2, "signature", ASN1_EOC, ASN1_RAW }, /* 4 */ - { 2, "issuer", ASN1_SEQUENCE, ASN1_OBJ }, /* 5 */ - { 2, "thisUpdate", ASN1_EOC, ASN1_RAW }, /* 6 */ - { 2, "nextUpdate", ASN1_EOC, ASN1_RAW }, /* 7 */ - { 2, "revokedCertificates", ASN1_SEQUENCE, ASN1_OPT | - ASN1_LOOP }, /* 8 */ - { 3, "certList", ASN1_SEQUENCE, ASN1_NONE }, /* 9 */ - { 4, "userCertificate", ASN1_INTEGER, ASN1_BODY }, /* 10 */ - { 4, "revocationDate", ASN1_EOC, ASN1_RAW }, /* 11 */ - { 4, "crlEntryExtensions", ASN1_SEQUENCE, ASN1_OPT | - ASN1_LOOP }, /* 12 */ - { 5, "extension", ASN1_SEQUENCE, ASN1_NONE }, /* 13 */ - { 6, "extnID", ASN1_OID, ASN1_BODY }, /* 14 */ - { 6, "critical", ASN1_BOOLEAN, ASN1_DEF | - ASN1_BODY }, /* 15 */ - { 6, "extnValue", ASN1_OCTET_STRING, ASN1_BODY }, /* 16 */ - { 4, "end opt or loop", ASN1_EOC, ASN1_END }, /* 17 */ - { 2, "end opt or loop", ASN1_EOC, ASN1_END }, /* 18 */ - { 2, "optional extensions", ASN1_CONTEXT_C_0, ASN1_OPT }, /* 19 */ - { 3, "crlExtensions", ASN1_SEQUENCE, ASN1_LOOP }, /* 20 */ - { 4, "extension", ASN1_SEQUENCE, ASN1_NONE }, /* 21 */ - { 5, "extnID", ASN1_OID, ASN1_BODY }, /* 22 */ - { 5, "critical", ASN1_BOOLEAN, ASN1_DEF | - ASN1_BODY }, /* 23 */ - { 5, "extnValue", ASN1_OCTET_STRING, ASN1_BODY }, /* 24 */ - { 3, "end loop", ASN1_EOC, ASN1_END }, /* 25 */ - { 2, "end opt", ASN1_EOC, ASN1_END }, /* 26 */ - { 1, "signatureAlgorithm", ASN1_EOC, ASN1_RAW }, /* 27 */ - { 1, "signatureValue", ASN1_BIT_STRING, ASN1_BODY } /* 28 */ - }; - -#define CRL_OBJ_CERTIFICATE_LIST 0 + { 0, "certificateList", ASN1_SEQUENCE, ASN1_OBJ }, /* 0 */ + { 1, "tbsCertList", ASN1_SEQUENCE, ASN1_OBJ }, /* 1 */ + { 2, "version", ASN1_INTEGER, ASN1_OPT | + ASN1_BODY }, /* 2 */ + { 2, "end opt", ASN1_EOC, ASN1_END }, /* 3 */ + { 2, "signature", ASN1_EOC, ASN1_RAW }, /* 4 */ + { 2, "issuer", ASN1_SEQUENCE, ASN1_OBJ }, /* 5 */ + { 2, "thisUpdate", ASN1_EOC, ASN1_RAW }, /* 6 */ + { 2, "nextUpdate", ASN1_EOC, ASN1_RAW }, /* 7 */ + { 2, "revokedCertificates", ASN1_SEQUENCE, ASN1_OPT | + ASN1_LOOP }, /* 8 */ + { 3, "certList", ASN1_SEQUENCE, ASN1_NONE }, /* 9 */ + { 4, "userCertificate", ASN1_INTEGER, ASN1_BODY }, /* 10 */ + { 4, "revocationDate", ASN1_EOC, ASN1_RAW }, /* 11 */ + { 4, "crlEntryExtensions", ASN1_SEQUENCE, ASN1_OPT | + ASN1_LOOP }, /* 12 */ + { 5, "extension", ASN1_SEQUENCE, ASN1_NONE }, /* 13 */ + { 6, "extnID", ASN1_OID, ASN1_BODY }, /* 14 */ + { 6, "critical", ASN1_BOOLEAN, ASN1_DEF | + ASN1_BODY }, /* 15 */ + { 6, "extnValue", ASN1_OCTET_STRING, ASN1_BODY }, /* 16 */ + { 4, "end opt or loop", ASN1_EOC, ASN1_END }, /* 17 */ + { 2, "end opt or loop", ASN1_EOC, ASN1_END }, /* 18 */ + { 2, "optional extensions", ASN1_CONTEXT_C_0, ASN1_OPT }, /* 19 */ + { 3, "crlExtensions", ASN1_SEQUENCE, ASN1_LOOP }, /* 20 */ + { 4, "extension", ASN1_SEQUENCE, ASN1_NONE }, /* 21 */ + { 5, "extnID", ASN1_OID, ASN1_BODY }, /* 22 */ + { 5, "critical", ASN1_BOOLEAN, ASN1_DEF | + ASN1_BODY }, /* 23 */ + { 5, "extnValue", ASN1_OCTET_STRING, ASN1_BODY }, /* 24 */ + { 3, "end loop", ASN1_EOC, ASN1_END }, /* 25 */ + { 2, "end opt", ASN1_EOC, ASN1_END }, /* 26 */ + { 1, "signatureAlgorithm", ASN1_EOC, ASN1_RAW }, /* 27 */ + { 1, "signatureValue", ASN1_BIT_STRING, ASN1_BODY }, /* 28 */ + { 0, "exit", ASN1_EOC, ASN1_EXIT } +}; + +#define CRL_OBJ_CERTIFICATE_LIST 0 #define CRL_OBJ_TBS_CERT_LIST 1 -#define CRL_OBJ_VERSION 2 -#define CRL_OBJ_SIG_ALG 4 -#define CRL_OBJ_ISSUER 5 -#define CRL_OBJ_THIS_UPDATE 6 -#define CRL_OBJ_NEXT_UPDATE 7 +#define CRL_OBJ_VERSION 2 +#define CRL_OBJ_SIG_ALG 4 +#define CRL_OBJ_ISSUER 5 +#define CRL_OBJ_THIS_UPDATE 6 +#define CRL_OBJ_NEXT_UPDATE 7 #define CRL_OBJ_USER_CERTIFICATE 10 #define CRL_OBJ_REVOCATION_DATE 11 #define CRL_OBJ_CRL_ENTRY_EXTN_ID 14 #define CRL_OBJ_CRL_ENTRY_CRITICAL 15 -#define CRL_OBJ_CRL_ENTRY_EXTN_VALUE 16 -#define CRL_OBJ_EXTN_ID 22 -#define CRL_OBJ_CRITICAL 23 -#define CRL_OBJ_EXTN_VALUE 24 -#define CRL_OBJ_ALGORITHM 27 -#define CRL_OBJ_SIGNATURE 28 -#define CRL_OBJ_ROOF 29 - +#define CRL_OBJ_CRL_ENTRY_EXTN_VALUE 16 +#define CRL_OBJ_EXTN_ID 22 +#define CRL_OBJ_CRITICAL 23 +#define CRL_OBJ_EXTN_VALUE 24 +#define CRL_OBJ_ALGORITHM 27 +#define CRL_OBJ_SIGNATURE 28 const x509crl_t empty_x509crl = { - NULL , /* *next */ - UNDEFINED_TIME, /* installed */ - NULL , /* distributionPoints */ - { NULL, 0 } , /* certificateList */ - { NULL, 0 } , /* tbsCertList */ - 1 , /* version */ - OID_UNKNOWN , /* sigAlg */ - { NULL, 0 } , /* issuer */ - UNDEFINED_TIME, /* thisUpdate */ - UNDEFINED_TIME, /* nextUpdate */ - NULL , /* revokedCertificates */ - /* crlExtensions */ - /* extension */ - /* extnID */ - /* critical */ - /* extnValue */ - { NULL, 0 } , /* authKeyID */ - { NULL, 0 } , /* authKeySerialNumber */ - { NULL, 0 } , /* crlNumber */ - OID_UNKNOWN , /* algorithm */ - { NULL, 0 } /* signature */ + NULL , /* *next */ + UNDEFINED_TIME, /* installed */ + NULL , /* distributionPoints */ + { NULL, 0 } , /* certificateList */ + { NULL, 0 } , /* tbsCertList */ + 1 , /* version */ + OID_UNKNOWN , /* sigAlg */ + { NULL, 0 } , /* issuer */ + UNDEFINED_TIME, /* thisUpdate */ + UNDEFINED_TIME, /* nextUpdate */ + NULL , /* revokedCertificates */ + /* crlExtensions */ + /* extension */ + /* extnID */ + /* critical */ + /* extnValue */ + { NULL, 0 } , /* authKeyID */ + { NULL, 0 } , /* authKeySerialNumber */ + { NULL, 0 } , /* crlNumber */ + OID_UNKNOWN , /* algorithm */ + { NULL, 0 } /* signature */ }; -/* - * get the X.509 CRL with a given issuer +/** + * Get the X.509 CRL with a given issuer */ -static x509crl_t* -get_x509crl(chunk_t issuer, chunk_t serial, chunk_t keyid) +static x509crl_t* get_x509crl(chunk_t issuer, chunk_t serial, chunk_t keyid) { - x509crl_t *crl = x509crls; - x509crl_t *prev_crl = NULL; - - while (crl != NULL) - { - if ((keyid.ptr != NULL && crl->authKeyID.ptr != NULL) - ? same_keyid(keyid, crl->authKeyID) - : (same_dn(crl->issuer, issuer) && same_serial(serial, crl->authKeySerialNumber))) + x509crl_t *crl = x509crls; + x509crl_t *prev_crl = NULL; + + while (crl != NULL) { - if (crl != x509crls) - { - /* bring the CRL up front */ - prev_crl->next = crl->next; - crl->next = x509crls; - x509crls = crl; - } - return crl; + if ((keyid.ptr != NULL && crl->authKeyID.ptr != NULL) + ? same_keyid(keyid, crl->authKeyID) + : (same_dn(crl->issuer, issuer) && same_serial(serial, crl->authKeySerialNumber))) + { + if (crl != x509crls) + { + /* bring the CRL up front */ + prev_crl->next = crl->next; + crl->next = x509crls; + x509crls = crl; + } + return crl; + } + prev_crl = crl; + crl = crl->next; } - prev_crl = crl; - crl = crl->next; - } - return NULL; + return NULL; } -/* - * free the dynamic memory used to store revoked certificates +/** + * Free the dynamic memory used to store revoked certificates */ -static void -free_revoked_certs(revokedCert_t* revokedCerts) +static void free_revoked_certs(revokedCert_t* revokedCerts) { - while (revokedCerts != NULL) - { - revokedCert_t * revokedCert = revokedCerts; - revokedCerts = revokedCert->next; - pfree(revokedCert); - } + while (revokedCerts != NULL) + { + revokedCert_t * revokedCert = revokedCerts; + revokedCerts = revokedCert->next; + free(revokedCert); + } } -/* - * free the dynamic memory used to store CRLs +/** + * Free the dynamic memory used to store CRLs */ -void -free_crl(x509crl_t *crl) +void free_crl(x509crl_t *crl) { - free_revoked_certs(crl->revokedCertificates); - free_generalNames(crl->distributionPoints, TRUE); - pfree(crl->certificateList.ptr); - pfree(crl); + free_revoked_certs(crl->revokedCertificates); + free_generalNames(crl->distributionPoints, TRUE); + free(crl->certificateList.ptr); + free(crl); } -static void -free_first_crl(void) +static void free_first_crl(void) { - x509crl_t *crl = x509crls; + x509crl_t *crl = x509crls; - x509crls = crl->next; - free_crl(crl); + x509crls = crl->next; + free_crl(crl); } -void -free_crls(void) +void free_crls(void) { - lock_crl_list("free_crls"); + lock_crl_list("free_crls"); - while (x509crls != NULL) - free_first_crl(); + while (x509crls != NULL) + free_first_crl(); - unlock_crl_list("free_crls"); + unlock_crl_list("free_crls"); } -/* +/** * Insert X.509 CRL into chained list */ -bool -insert_crl(chunk_t blob, chunk_t crl_uri, bool cache_crl) +bool insert_crl(chunk_t blob, chunk_t crl_uri, bool cache_crl) { - x509crl_t *crl = alloc_thing(x509crl_t, "x509crl"); - - *crl = empty_x509crl; - - if (parse_x509crl(blob, 0, crl)) - { - x509cert_t *issuer_cert; - x509crl_t *oldcrl; - bool valid_sig; - generalName_t *gn; - - /* add distribution point */ - gn = alloc_thing(generalName_t, "generalName"); - gn->kind = GN_URI; - gn->name = crl_uri; - gn->next = crl->distributionPoints; - crl->distributionPoints = gn; - - lock_authcert_list("insert_crl"); - /* get the issuer cacert */ - issuer_cert = get_authcert(crl->issuer, crl->authKeySerialNumber, - crl->authKeyID, AUTH_CA); - if (issuer_cert == NULL) - { - plog("crl issuer cacert not found"); - free_crl(crl); - unlock_authcert_list("insert_crl"); - return FALSE; - } - DBG(DBG_CONTROL, - DBG_log("crl issuer cacert found") - ) - - /* check the issuer's signature of the crl */ - valid_sig = check_signature(crl->tbsCertList, crl->signature - , crl->algorithm, crl->algorithm, issuer_cert); - unlock_authcert_list("insert_crl"); + x509crl_t *crl = malloc_thing(x509crl_t); - if (!valid_sig) - { - free_crl(crl); - return FALSE; - } - DBG(DBG_CONTROL, - DBG_log("crl signature is valid") - ) - - lock_crl_list("insert_crl"); - oldcrl = get_x509crl(crl->issuer, crl->authKeySerialNumber - , crl->authKeyID); + *crl = empty_x509crl; - if (oldcrl != NULL) + if (parse_x509crl(blob, 0, crl)) { - if (crl->thisUpdate > oldcrl->thisUpdate) - { - /* keep any known CRL distribution points */ - add_distribution_points(oldcrl->distributionPoints - , &crl->distributionPoints); - - /* now delete the old CRL */ - free_first_crl(); + x509cert_t *issuer_cert; + x509crl_t *oldcrl; + bool valid_sig; + generalName_t *gn; + + /* add distribution point */ + gn = malloc_thing(generalName_t); + gn->kind = GN_URI; + gn->name = crl_uri; + gn->next = crl->distributionPoints; + crl->distributionPoints = gn; + + lock_authcert_list("insert_crl"); + /* get the issuer cacert */ + issuer_cert = get_authcert(crl->issuer, crl->authKeySerialNumber, + crl->authKeyID, AUTH_CA); + if (issuer_cert == NULL) + { + plog("crl issuer cacert not found"); + free_crl(crl); + unlock_authcert_list("insert_crl"); + return FALSE; + } DBG(DBG_CONTROL, - DBG_log("thisUpdate is newer - existing crl deleted") + DBG_log("crl issuer cacert found") ) - } - else - { - unlock_crl_list("insert_crls"); + + /* check the issuer's signature of the crl */ + valid_sig = x509_check_signature(crl->tbsCertList, crl->signature, + crl->algorithm, issuer_cert); + unlock_authcert_list("insert_crl"); + + if (!valid_sig) + { + free_crl(crl); + return FALSE; + } DBG(DBG_CONTROL, - DBG_log("thisUpdate is not newer - existing crl not replaced"); + DBG_log("crl signature is valid") ) - free_crl(crl); - return oldcrl->nextUpdate - time(NULL) > 2*crl_check_interval; - } - } - /* insert new CRL */ - crl->next = x509crls; - x509crls = crl; + lock_crl_list("insert_crl"); + oldcrl = get_x509crl(crl->issuer, crl->authKeySerialNumber + , crl->authKeyID); - unlock_crl_list("insert_crl"); + if (oldcrl != NULL) + { + if (crl->thisUpdate > oldcrl->thisUpdate) + { + /* keep any known CRL distribution points */ + add_distribution_points(oldcrl->distributionPoints + , &crl->distributionPoints); + + /* now delete the old CRL */ + free_first_crl(); + DBG(DBG_CONTROL, + DBG_log("thisUpdate is newer - existing crl deleted") + ) + } + else + { + unlock_crl_list("insert_crls"); + DBG(DBG_CONTROL, + DBG_log("thisUpdate is not newer - existing crl not replaced"); + ) + free_crl(crl); + return oldcrl->nextUpdate - time(NULL) > 2*crl_check_interval; + } + } - /* If crl caching is enabled then the crl is saved locally. - * Only http or ldap URIs are cached but not local file URIs. - * The issuer's subjectKeyID is used as a unique filename - */ - if (cache_crl && strncasecmp(crl_uri.ptr, "file", 4) != 0) + /* insert new CRL */ + crl->next = x509crls; + x509crls = crl; + + unlock_crl_list("insert_crl"); + + /* If crl caching is enabled then the crl is saved locally. + * Only http or ldap URIs are cached but not local file URIs. + * The issuer's subjectKeyID is used as a unique filename + */ + if (cache_crl && strncasecmp(crl_uri.ptr, "file", 4) != 0) + { + char path[BUF_LEN], buf[BUF_LEN]; + char digest_buf[HASH_SIZE_SHA1]; + chunk_t subjectKeyID = chunk_from_buf(digest_buf); + bool has_keyID; + + if (issuer_cert->subjectKeyID.ptr == NULL) + { + has_keyID = compute_subjectKeyID(issuer_cert, subjectKeyID); + } + else + { + subjectKeyID = issuer_cert->subjectKeyID; + has_keyID = TRUE; + } + if (has_keyID) + { + datatot(subjectKeyID.ptr, subjectKeyID.len, 16, buf, BUF_LEN); + snprintf(path, BUF_LEN, "%s/%s.crl", CRL_PATH, buf); + chunk_write(crl->certificateList, path, "crl", 0022, TRUE); + } + } + + /* is the fetched crl valid? */ + return crl->nextUpdate - time(NULL) > 2*crl_check_interval; + } + else { - char path[BUF_LEN]; - char buf[BUF_LEN]; - char digest_buf[SHA1_DIGEST_SIZE]; - chunk_t subjectKeyID = { digest_buf, SHA1_DIGEST_SIZE }; - - if (issuer_cert->subjectKeyID.ptr == NULL) - compute_subjectKeyID(issuer_cert, subjectKeyID); - else - subjectKeyID = issuer_cert->subjectKeyID; - - datatot(subjectKeyID.ptr, subjectKeyID.len, 16, buf, BUF_LEN); - snprintf(path, BUF_LEN, "%s/%s.crl", CRL_PATH, buf); - write_chunk(path, "crl", crl->certificateList, 0022, TRUE); + plog(" error in X.509 crl"); + free_crl(crl); + return FALSE; } - - /* is the fetched crl valid? */ - return crl->nextUpdate - time(NULL) > 2*crl_check_interval; - } - else - { - plog(" error in X.509 crl"); - free_crl(crl); - return FALSE; - } } -/* +/** * Loads CRLs */ -void -load_crls(void) +void load_crls(void) { - struct dirent **filelist; - u_char buf[BUF_LEN]; - u_char *save_dir; - int n; - - /* change directory to specified path */ - save_dir = getcwd(buf, BUF_LEN); - if (chdir(CRL_PATH)) - { - plog("Could not change to directory '%s'", CRL_PATH); - } - else - { - plog("Changing to directory '%s'", CRL_PATH); - n = scandir(CRL_PATH, &filelist, file_select, alphasort); - - if (n < 0) - plog(" scandir() error"); + struct dirent **filelist; + u_char buf[BUF_LEN]; + u_char *save_dir; + int n; + + /* change directory to specified path */ + save_dir = getcwd(buf, BUF_LEN); + if (chdir(CRL_PATH)) + { + plog("Could not change to directory '%s'", CRL_PATH); + } else { - while (n--) - { - bool pgp = FALSE; - chunk_t blob = empty_chunk; - char *filename = filelist[n]->d_name; + plog("Changing to directory '%s'", CRL_PATH); + n = scandir(CRL_PATH, &filelist, file_select, alphasort); - if (load_coded_file(filename, NULL, "crl", &blob, &pgp)) + if (n < 0) + plog(" scandir() error"); + else { - chunk_t crl_uri; - - crl_uri.len = 7 + sizeof(CRL_PATH) + strlen(filename); - crl_uri.ptr = alloc_bytes(crl_uri.len + 1, "crl uri"); - - /* build CRL file URI */ - snprintf(crl_uri.ptr, crl_uri.len + 1, "file://%s/%s" - , CRL_PATH, filename); - - insert_crl(blob, crl_uri, FALSE); + while (n--) + { + bool pgp = FALSE; + chunk_t blob = chunk_empty; + char *filename = filelist[n]->d_name; + + if (load_coded_file(filename, NULL, "crl", &blob, &pgp)) + { + chunk_t crl_uri; + + crl_uri.len = 7 + sizeof(CRL_PATH) + strlen(filename); + crl_uri.ptr = malloc(crl_uri.len + 1); + + /* build CRL file URI */ + snprintf(crl_uri.ptr, crl_uri.len + 1, "file://%s/%s" + , CRL_PATH, filename); + + insert_crl(blob, crl_uri, FALSE); + } + free(filelist[n]); + } + free(filelist); } - free(filelist[n]); - } - free(filelist); } - } - /* restore directory path */ - ignore_result(chdir(save_dir)); + /* restore directory path */ + ignore_result(chdir(save_dir)); } -/* +/** * Parses a CRL revocation reason code */ -static crl_reason_t -parse_crl_reasonCode(chunk_t object) +static crl_reason_t parse_crl_reasonCode(chunk_t object) { - crl_reason_t reason = REASON_UNSPECIFIED; - - if (*object.ptr == ASN1_ENUMERATED - && asn1_length(&object) == 1) - { - reason = *object.ptr; - } - - DBG(DBG_PARSING, - DBG_log(" '%s'", enum_name(&crl_reason_names, reason)) - ) - return reason; + crl_reason_t reason = REASON_UNSPECIFIED; + + if (*object.ptr == ASN1_ENUMERATED + && asn1_length(&object) == 1) + { + reason = *object.ptr; + } + + DBG(DBG_PARSING, + DBG_log(" '%N'", crl_reason_names, reason) + ) + return reason; } /* * Parses an X.509 CRL */ -bool -parse_x509crl(chunk_t blob, u_int level0, x509crl_t *crl) +bool parse_x509crl(chunk_t blob, u_int level0, x509crl_t *crl) { - u_char buf[BUF_LEN]; - asn1_ctx_t ctx; - bool critical; - chunk_t extnID; - chunk_t userCertificate = empty_chunk; - chunk_t object; - u_int level; - int objectID = 0; - - asn1_init(&ctx, blob, level0, FALSE, DBG_RAW); - - while (objectID < CRL_OBJ_ROOF) - { - if (!extract_object(crlObjects, &objectID, &object, &level, &ctx)) - return FALSE; - - /* those objects which will parsed further need the next higher level */ - level++; - - switch (objectID) { - case CRL_OBJ_CERTIFICATE_LIST: - crl->certificateList = object; - break; - case CRL_OBJ_TBS_CERT_LIST: - crl->tbsCertList = object; - break; - case CRL_OBJ_VERSION: - crl->version = (object.len) ? (1+(u_int)*object.ptr) : 1; - DBG(DBG_PARSING, - DBG_log(" v%d", crl->version); - ) - break; - case CRL_OBJ_SIG_ALG: - crl->sigAlg = parse_algorithmIdentifier(object, level, NULL); - break; - case CRL_OBJ_ISSUER: - crl->issuer = object; - DBG(DBG_PARSING, - dntoa(buf, BUF_LEN, object); - DBG_log(" '%s'",buf) - ) - break; - case CRL_OBJ_THIS_UPDATE: - crl->thisUpdate = parse_time(object, level); - break; - case CRL_OBJ_NEXT_UPDATE: - crl->nextUpdate = parse_time(object, level); - break; - case CRL_OBJ_USER_CERTIFICATE: - userCertificate = object; - break; - case CRL_OBJ_REVOCATION_DATE: - { - /* put all the serial numbers and the revocation date in a chained list - with revocedCertificates pointing to the first revoked certificate */ - - revokedCert_t *revokedCert = alloc_thing(revokedCert_t, "revokedCert"); - revokedCert->userCertificate = userCertificate; - revokedCert->revocationDate = parse_time(object, level); - revokedCert->revocationReason = REASON_UNSPECIFIED; - revokedCert->next = crl->revokedCertificates; - crl->revokedCertificates = revokedCert; - } - break; - case CRL_OBJ_CRL_ENTRY_EXTN_ID: - case CRL_OBJ_EXTN_ID: - extnID = object; - break; - case CRL_OBJ_CRL_ENTRY_CRITICAL: - case CRL_OBJ_CRITICAL: - critical = object.len && *object.ptr; - DBG(DBG_PARSING, - DBG_log(" %s",(critical)?"TRUE":"FALSE"); - ) - break; - case CRL_OBJ_CRL_ENTRY_EXTN_VALUE: - case CRL_OBJ_EXTN_VALUE: - { - u_int extn_oid = known_oid(extnID); - - if (extn_oid == OID_CRL_REASON_CODE) - { - crl->revokedCertificates->revocationReason = - parse_crl_reasonCode(object); - } - else if (extn_oid == OID_AUTHORITY_KEY_ID) - { - parse_authorityKeyIdentifier(object, level - , &crl->authKeyID, &crl->authKeySerialNumber); - } - else if (extn_oid == OID_CRL_NUMBER) - { - if (!parse_asn1_simple_object(&object, ASN1_INTEGER, level, "crlNumber")) - return FALSE; - crl->crlNumber = object; + u_char buf[BUF_LEN]; + asn1_parser_t *parser; + chunk_t extnID; + chunk_t userCertificate = chunk_empty; + chunk_t object; + int objectID; + bool success = FALSE; + bool critical; + + parser = asn1_parser_create(crlObjects, blob); + + while (parser->iterate(parser, &objectID, &object)) + { + u_int level = parser->get_level(parser)+1; + + switch (objectID) { + case CRL_OBJ_CERTIFICATE_LIST: + crl->certificateList = object; + break; + case CRL_OBJ_TBS_CERT_LIST: + crl->tbsCertList = object; + break; + case CRL_OBJ_VERSION: + crl->version = (object.len) ? (1+(u_int)*object.ptr) : 1; + DBG(DBG_PARSING, + DBG_log(" v%d", crl->version); + ) + break; + case CRL_OBJ_SIG_ALG: + crl->sigAlg = asn1_parse_algorithmIdentifier(object, level, NULL); + break; + case CRL_OBJ_ISSUER: + crl->issuer = object; + DBG(DBG_PARSING, + dntoa(buf, BUF_LEN, object); + DBG_log(" '%s'",buf) + ) + break; + case CRL_OBJ_THIS_UPDATE: + crl->thisUpdate = asn1_parse_time(object, level); + break; + case CRL_OBJ_NEXT_UPDATE: + crl->nextUpdate = asn1_parse_time(object, level); + break; + case CRL_OBJ_USER_CERTIFICATE: + userCertificate = object; + break; + case CRL_OBJ_REVOCATION_DATE: + { + /* put all the serial numbers and the revocation date in a chained list + with revocedCertificates pointing to the first revoked certificate */ + + revokedCert_t *revokedCert = malloc_thing(revokedCert_t); + revokedCert->userCertificate = userCertificate; + revokedCert->revocationDate = asn1_parse_time(object, level); + revokedCert->revocationReason = REASON_UNSPECIFIED; + revokedCert->next = crl->revokedCertificates; + crl->revokedCertificates = revokedCert; + } + break; + case CRL_OBJ_CRL_ENTRY_EXTN_ID: + case CRL_OBJ_EXTN_ID: + extnID = object; + break; + case CRL_OBJ_CRL_ENTRY_CRITICAL: + case CRL_OBJ_CRITICAL: + critical = object.len && *object.ptr; + DBG(DBG_PARSING, + DBG_log(" %s",(critical)?"TRUE":"FALSE"); + ) + break; + case CRL_OBJ_CRL_ENTRY_EXTN_VALUE: + case CRL_OBJ_EXTN_VALUE: + { + u_int extn_oid = asn1_known_oid(extnID); + + if (extn_oid == OID_CRL_REASON_CODE) + { + crl->revokedCertificates->revocationReason = + parse_crl_reasonCode(object); + } + else if (extn_oid == OID_AUTHORITY_KEY_ID) + { + parse_authorityKeyIdentifier(object, level + , &crl->authKeyID, &crl->authKeySerialNumber); + } + else if (extn_oid == OID_CRL_NUMBER) + { + if (!asn1_parse_simple_object(&object, ASN1_INTEGER, + level, "crlNumber")) + { + goto end; + } + crl->crlNumber = object; + } + } + break; + case CRL_OBJ_ALGORITHM: + crl->algorithm = asn1_parse_algorithmIdentifier(object, level, NULL); + break; + case CRL_OBJ_SIGNATURE: + crl->signature = object; + break; + default: + break; } - } - break; - case CRL_OBJ_ALGORITHM: - crl->algorithm = parse_algorithmIdentifier(object, level, NULL); - break; - case CRL_OBJ_SIGNATURE: - crl->signature = object; - break; - default: - break; } - objectID++; - } - time(&crl->installed); - return TRUE; + success = parser->success(parser); + time(&crl->installed); + +end: + parser->destroy(parser); + return success; } /* Checks if the current certificate is revoked. It goes through the @@ -523,28 +525,28 @@ static cert_status_t check_revocation(const x509crl_t *crl, chunk_t serial , time_t *revocationDate, crl_reason_t * revocationReason) { - revokedCert_t *revokedCert = crl->revokedCertificates; - - *revocationDate = UNDEFINED_TIME; - *revocationReason = REASON_UNSPECIFIED; - - DBG(DBG_CONTROL, - DBG_dump_chunk("serial number:", serial) - ) - - while(revokedCert != NULL) - { - /* compare serial numbers */ - if (revokedCert->userCertificate.len == serial.len && - memcmp(revokedCert->userCertificate.ptr, serial.ptr, serial.len) == 0) + revokedCert_t *revokedCert = crl->revokedCertificates; + + *revocationDate = UNDEFINED_TIME; + *revocationReason = REASON_UNSPECIFIED; + + DBG(DBG_CONTROL, + DBG_dump_chunk("serial number:", serial) + ) + + while(revokedCert != NULL) { - *revocationDate = revokedCert->revocationDate; - *revocationReason = revokedCert->revocationReason; - return CERT_REVOKED; + /* compare serial numbers */ + if (revokedCert->userCertificate.len == serial.len && + memeq(revokedCert->userCertificate.ptr, serial.ptr, serial.len)) + { + *revocationDate = revokedCert->revocationDate; + *revocationReason = revokedCert->revocationReason; + return CERT_REVOKED; + } + revokedCert = revokedCert->next; } - revokedCert = revokedCert->next; - } - return CERT_GOOD; + return CERT_GOOD; } /* @@ -553,37 +555,37 @@ check_revocation(const x509crl_t *crl, chunk_t serial void check_crls(void) { - x509crl_t *crl; + x509crl_t *crl; - lock_crl_list("check_crls"); - crl = x509crls; - - while (crl != NULL) - { - time_t time_left = crl->nextUpdate - time(NULL); - u_char buf[BUF_LEN]; + lock_crl_list("check_crls"); + crl = x509crls; - DBG(DBG_CONTROL, - dntoa(buf, BUF_LEN, crl->issuer); - DBG_log("issuer: '%s'",buf); - if (crl->authKeyID.ptr != NULL) - { - datatot(crl->authKeyID.ptr, crl->authKeyID.len, ':' - , buf, BUF_LEN); - DBG_log("authkey: %s", buf); - } - DBG_log("%ld seconds left", time_left) - ) - if (time_left < 2*crl_check_interval) + while (crl != NULL) { - fetch_req_t *req = build_crl_fetch_request(crl->issuer - , crl->authKeySerialNumber - , crl->authKeyID, crl->distributionPoints); - add_crl_fetch_request(req); + time_t time_left = crl->nextUpdate - time(NULL); + u_char buf[BUF_LEN]; + + DBG(DBG_CONTROL, + dntoa(buf, BUF_LEN, crl->issuer); + DBG_log("issuer: '%s'",buf); + if (crl->authKeyID.ptr != NULL) + { + datatot(crl->authKeyID.ptr, crl->authKeyID.len, ':' + , buf, BUF_LEN); + DBG_log("authkey: %s", buf); + } + DBG_log("%ld seconds left", time_left) + ) + if (time_left < 2*crl_check_interval) + { + fetch_req_t *req = build_crl_fetch_request(crl->issuer + , crl->authKeySerialNumber + , crl->authKeyID, crl->distributionPoints); + add_crl_fetch_request(req); + } + crl = crl->next; } - crl = crl->next; - } - unlock_crl_list("check_crls"); + unlock_crl_list("check_crls"); } /* @@ -593,118 +595,117 @@ cert_status_t verify_by_crl(const x509cert_t *cert, time_t *until, time_t *revocationDate , crl_reason_t *revocationReason) { - x509crl_t *crl; - - ca_info_t *ca = get_ca_info(cert->issuer, cert->authKeySerialNumber - , cert->authKeyID); + x509crl_t *crl; - generalName_t *crluri = (ca == NULL)? NULL : ca->crluri; + ca_info_t *ca = get_ca_info(cert->issuer, cert->authKeySerialNumber + , cert->authKeyID); - *revocationDate = UNDEFINED_TIME; - *revocationReason = REASON_UNSPECIFIED; + generalName_t *crluri = (ca == NULL)? NULL : ca->crluri; - lock_crl_list("verify_by_crl"); - crl = get_x509crl(cert->issuer, cert->authKeySerialNumber, cert->authKeyID); + *revocationDate = UNDEFINED_TIME; + *revocationReason = REASON_UNSPECIFIED; - if (crl == NULL) - { - unlock_crl_list("verify_by_crl"); - plog("crl not found"); + lock_crl_list("verify_by_crl"); + crl = get_x509crl(cert->issuer, cert->authKeySerialNumber, cert->authKeyID); - if (cert->crlDistributionPoints != NULL) + if (crl == NULL) { - fetch_req_t *req = build_crl_fetch_request(cert->issuer - , cert->authKeySerialNumber - , cert->authKeyID, cert->crlDistributionPoints); - add_crl_fetch_request(req); - } + unlock_crl_list("verify_by_crl"); + plog("crl not found"); - if (crluri != NULL) - { - fetch_req_t *req = build_crl_fetch_request(cert->issuer - , cert->authKeySerialNumber - , cert->authKeyID, crluri); - add_crl_fetch_request(req); - } + if (cert->crlDistributionPoints != NULL) + { + fetch_req_t *req = build_crl_fetch_request(cert->issuer + , cert->authKeySerialNumber + , cert->authKeyID, cert->crlDistributionPoints); + add_crl_fetch_request(req); + } - if (cert->crlDistributionPoints != 0 || crluri != NULL) - { - wake_fetch_thread("verify_by_crl"); - return CERT_UNKNOWN; + if (crluri != NULL) + { + fetch_req_t *req = build_crl_fetch_request(cert->issuer + , cert->authKeySerialNumber + , cert->authKeyID, crluri); + add_crl_fetch_request(req); + } + + if (cert->crlDistributionPoints != 0 || crluri != NULL) + { + wake_fetch_thread("verify_by_crl"); + return CERT_UNKNOWN; + } + else + return CERT_UNDEFINED; } else - return CERT_UNDEFINED; - } - else - { - x509cert_t *issuer_cert; - bool valid; - - DBG(DBG_CONTROL, - DBG_log("crl found") - ) - - add_distribution_points(cert->crlDistributionPoints - , &crl->distributionPoints); - - add_distribution_points(crluri - , &crl->distributionPoints); - - lock_authcert_list("verify_by_crl"); - - issuer_cert = get_authcert(crl->issuer, crl->authKeySerialNumber - , crl->authKeyID, AUTH_CA); - valid = check_signature(crl->tbsCertList, crl->signature - , crl->algorithm, crl->algorithm, issuer_cert); - - unlock_authcert_list("verify_by_crl"); - - if (valid) { - cert_status_t status; + x509cert_t *issuer_cert; + bool valid; - DBG(DBG_CONTROL, - DBG_log("crl signature is valid") - ) - /* return the expiration date */ - *until = crl->nextUpdate; + DBG(DBG_CONTROL, + DBG_log("crl found") + ) - /* has the certificate been revoked? */ - status = check_revocation(crl, cert->serialNumber, revocationDate - , revocationReason); + add_distribution_points(cert->crlDistributionPoints + , &crl->distributionPoints); - if (*until < time(NULL)) - { - fetch_req_t *req; + add_distribution_points(crluri + , &crl->distributionPoints); - plog("crl update is overdue since %s" - , timetoa(until, TRUE)); + lock_authcert_list("verify_by_crl"); - /* try to fetch a crl update */ - req = build_crl_fetch_request(crl->issuer - , crl->authKeySerialNumber - , crl->authKeyID, crl->distributionPoints); - unlock_crl_list("verify_by_crl"); + issuer_cert = get_authcert(crl->issuer, crl->authKeySerialNumber + , crl->authKeyID, AUTH_CA); + valid = x509_check_signature(crl->tbsCertList, crl->signature, + crl->algorithm, issuer_cert); + + unlock_authcert_list("verify_by_crl"); - add_crl_fetch_request(req); - wake_fetch_thread("verify_by_crl"); - } - else - { - unlock_crl_list("verify_by_crl"); - DBG(DBG_CONTROL, - DBG_log("crl is valid") - ) - } - return status; - } - else - { - unlock_crl_list("verify_by_crl"); - plog("crl signature is invalid"); - return CERT_UNKNOWN; + if (valid) + { + cert_status_t status; + + DBG(DBG_CONTROL, + DBG_log("crl signature is valid") + ) + /* return the expiration date */ + *until = crl->nextUpdate; + + /* has the certificate been revoked? */ + status = check_revocation(crl, cert->serialNumber, revocationDate + , revocationReason); + + if (*until < time(NULL)) + { + fetch_req_t *req; + + plog("crl update is overdue since %T", until, TRUE); + + /* try to fetch a crl update */ + req = build_crl_fetch_request(crl->issuer + , crl->authKeySerialNumber + , crl->authKeyID, crl->distributionPoints); + unlock_crl_list("verify_by_crl"); + + add_crl_fetch_request(req); + wake_fetch_thread("verify_by_crl"); + } + else + { + unlock_crl_list("verify_by_crl"); + DBG(DBG_CONTROL, + DBG_log("crl is valid") + ) + } + return status; + } + else + { + unlock_crl_list("verify_by_crl"); + plog("crl signature is invalid"); + return CERT_UNKNOWN; + } } - } } /* @@ -713,63 +714,63 @@ verify_by_crl(const x509cert_t *cert, time_t *until, time_t *revocationDate void list_crls(bool utc, bool strict) { - x509crl_t *crl; + x509crl_t *crl; - lock_crl_list("list_crls"); - crl = x509crls; + lock_crl_list("list_crls"); + crl = x509crls; - if (crl != NULL) - { - whack_log(RC_COMMENT, " "); - whack_log(RC_COMMENT, "List of X.509 CRLs:"); - whack_log(RC_COMMENT, " "); - } - - while (crl != NULL) - { - u_char buf[BUF_LEN]; - u_int revoked = 0; - revokedCert_t *revokedCert = crl->revokedCertificates; - - /* count number of revoked certificates in CRL */ - while (revokedCert != NULL) - { - revoked++; - revokedCert = revokedCert->next; - } - - whack_log(RC_COMMENT, "%s, revoked certs: %d", - timetoa(&crl->installed, utc), revoked); - dntoa(buf, BUF_LEN, crl->issuer); - whack_log(RC_COMMENT, " issuer: '%s'", buf); - if (crl->crlNumber.ptr != NULL) + if (crl != NULL) { - datatot(crl->crlNumber.ptr, crl->crlNumber.len, ':' - , buf, BUF_LEN); - whack_log(RC_COMMENT, " crlnumber: %s", buf); + whack_log(RC_COMMENT, " "); + whack_log(RC_COMMENT, "List of X.509 CRLs:"); + whack_log(RC_COMMENT, " "); } - list_distribution_points(crl->distributionPoints); - - whack_log(RC_COMMENT, " updates: this %s", - timetoa(&crl->thisUpdate, utc)); - whack_log(RC_COMMENT, " next %s %s", - timetoa(&crl->nextUpdate, utc), - check_expiry(crl->nextUpdate, CRL_WARNING_INTERVAL, strict)); - if (crl->authKeyID.ptr != NULL) - { - datatot(crl->authKeyID.ptr, crl->authKeyID.len, ':' - , buf, BUF_LEN); - whack_log(RC_COMMENT, " authkey: %s", buf); - } - if (crl->authKeySerialNumber.ptr != NULL) + + while (crl != NULL) { - datatot(crl->authKeySerialNumber.ptr, crl->authKeySerialNumber.len, ':' - , buf, BUF_LEN); - whack_log(RC_COMMENT, " aserial: %s", buf); - } + u_char buf[BUF_LEN]; + u_int revoked = 0; + revokedCert_t *revokedCert = crl->revokedCertificates; + + /* count number of revoked certificates in CRL */ + while (revokedCert != NULL) + { + revoked++; + revokedCert = revokedCert->next; + } + + whack_log(RC_COMMENT, "%T, revoked certs: %d", + &crl->installed, utc, revoked); + dntoa(buf, BUF_LEN, crl->issuer); + whack_log(RC_COMMENT, " issuer: '%s'", buf); + if (crl->crlNumber.ptr != NULL) + { + datatot(crl->crlNumber.ptr, crl->crlNumber.len, ':' + , buf, BUF_LEN); + whack_log(RC_COMMENT, " crlnumber: %s", buf); + } + list_distribution_points(crl->distributionPoints); + + whack_log(RC_COMMENT, " updates: this %T", + &crl->thisUpdate, utc); + whack_log(RC_COMMENT, " next %T %s", + &crl->nextUpdate, utc, + check_expiry(crl->nextUpdate, CRL_WARNING_INTERVAL, strict)); + if (crl->authKeyID.ptr != NULL) + { + datatot(crl->authKeyID.ptr, crl->authKeyID.len, ':' + , buf, BUF_LEN); + whack_log(RC_COMMENT, " authkey: %s", buf); + } + if (crl->authKeySerialNumber.ptr != NULL) + { + datatot(crl->authKeySerialNumber.ptr, crl->authKeySerialNumber.len, ':' + , buf, BUF_LEN); + whack_log(RC_COMMENT, " aserial: %s", buf); + } - crl = crl->next; - } - unlock_crl_list("list_crls"); + crl = crl->next; + } + unlock_crl_list("list_crls"); } |