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478 lines
14 KiB
C
478 lines
14 KiB
C
/*
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* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/x509.h>
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#include "internal/x509_int.h"
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#include <openssl/x509v3.h>
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#include "x509_lcl.h"
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static int X509_REVOKED_cmp(const X509_REVOKED *const *a,
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const X509_REVOKED *const *b);
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static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp);
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ASN1_SEQUENCE(X509_REVOKED) = {
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ASN1_EMBED(X509_REVOKED,serialNumber, ASN1_INTEGER),
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ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
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ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
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} ASN1_SEQUENCE_END(X509_REVOKED)
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static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r);
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static int def_crl_lookup(X509_CRL *crl,
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X509_REVOKED **ret, ASN1_INTEGER *serial,
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X509_NAME *issuer);
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static X509_CRL_METHOD int_crl_meth = {
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0,
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0, 0,
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def_crl_lookup,
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def_crl_verify
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};
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static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;
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/*
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* The X509_CRL_INFO structure needs a bit of customisation. Since we cache
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* the original encoding the signature won't be affected by reordering of the
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* revoked field.
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*/
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static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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void *exarg)
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{
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X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;
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if (!a || !a->revoked)
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return 1;
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switch (operation) {
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/*
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* Just set cmp function here. We don't sort because that would
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* affect the output of X509_CRL_print().
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*/
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case ASN1_OP_D2I_POST:
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(void)sk_X509_REVOKED_set_cmp_func(a->revoked, X509_REVOKED_cmp);
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break;
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}
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return 1;
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}
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ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
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ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
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ASN1_EMBED(X509_CRL_INFO, sig_alg, X509_ALGOR),
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ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
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ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
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ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
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ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
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ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
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} ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
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/*
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* Set CRL entry issuer according to CRL certificate issuer extension. Check
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* for unhandled critical CRL entry extensions.
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*/
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static int crl_set_issuers(X509_CRL *crl)
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{
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int i, j;
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GENERAL_NAMES *gens, *gtmp;
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STACK_OF(X509_REVOKED) *revoked;
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revoked = X509_CRL_get_REVOKED(crl);
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gens = NULL;
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for (i = 0; i < sk_X509_REVOKED_num(revoked); i++) {
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X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i);
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STACK_OF(X509_EXTENSION) *exts;
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ASN1_ENUMERATED *reason;
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X509_EXTENSION *ext;
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gtmp = X509_REVOKED_get_ext_d2i(rev,
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NID_certificate_issuer, &j, NULL);
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if (!gtmp && (j != -1)) {
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crl->flags |= EXFLAG_INVALID;
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return 1;
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}
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if (gtmp) {
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gens = gtmp;
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if (!crl->issuers) {
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crl->issuers = sk_GENERAL_NAMES_new_null();
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if (!crl->issuers)
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return 0;
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}
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if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp))
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return 0;
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}
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rev->issuer = gens;
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reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason, &j, NULL);
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if (!reason && (j != -1)) {
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crl->flags |= EXFLAG_INVALID;
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return 1;
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}
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if (reason) {
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rev->reason = ASN1_ENUMERATED_get(reason);
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ASN1_ENUMERATED_free(reason);
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} else
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rev->reason = CRL_REASON_NONE;
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/* Check for critical CRL entry extensions */
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exts = rev->extensions;
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for (j = 0; j < sk_X509_EXTENSION_num(exts); j++) {
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ext = sk_X509_EXTENSION_value(exts, j);
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if (X509_EXTENSION_get_critical(ext)) {
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if (OBJ_obj2nid(X509_EXTENSION_get_object(ext)) == NID_certificate_issuer)
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continue;
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crl->flags |= EXFLAG_CRITICAL;
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break;
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}
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}
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}
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return 1;
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}
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/*
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* The X509_CRL structure needs a bit of customisation. Cache some extensions
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* and hash of the whole CRL.
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*/
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static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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void *exarg)
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{
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X509_CRL *crl = (X509_CRL *)*pval;
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STACK_OF(X509_EXTENSION) *exts;
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X509_EXTENSION *ext;
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int idx;
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switch (operation) {
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case ASN1_OP_D2I_PRE:
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if (crl->meth->crl_free) {
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if (!crl->meth->crl_free(crl))
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return 0;
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}
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AUTHORITY_KEYID_free(crl->akid);
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ISSUING_DIST_POINT_free(crl->idp);
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ASN1_INTEGER_free(crl->crl_number);
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ASN1_INTEGER_free(crl->base_crl_number);
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sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
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/* fall thru */
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case ASN1_OP_NEW_POST:
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crl->idp = NULL;
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crl->akid = NULL;
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crl->flags = 0;
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crl->idp_flags = 0;
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crl->idp_reasons = CRLDP_ALL_REASONS;
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crl->meth = default_crl_method;
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crl->meth_data = NULL;
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crl->issuers = NULL;
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crl->crl_number = NULL;
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crl->base_crl_number = NULL;
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break;
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case ASN1_OP_D2I_POST:
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X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
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crl->idp = X509_CRL_get_ext_d2i(crl,
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NID_issuing_distribution_point, NULL,
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NULL);
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if (crl->idp)
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setup_idp(crl, crl->idp);
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crl->akid = X509_CRL_get_ext_d2i(crl,
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NID_authority_key_identifier, NULL,
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NULL);
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crl->crl_number = X509_CRL_get_ext_d2i(crl,
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NID_crl_number, NULL, NULL);
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crl->base_crl_number = X509_CRL_get_ext_d2i(crl,
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NID_delta_crl, NULL,
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NULL);
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/* Delta CRLs must have CRL number */
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if (crl->base_crl_number && !crl->crl_number)
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crl->flags |= EXFLAG_INVALID;
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/*
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* See if we have any unhandled critical CRL extensions and indicate
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* this in a flag. We only currently handle IDP so anything else
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* critical sets the flag. This code accesses the X509_CRL structure
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* directly: applications shouldn't do this.
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*/
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exts = crl->crl.extensions;
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for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++) {
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int nid;
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ext = sk_X509_EXTENSION_value(exts, idx);
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nid = OBJ_obj2nid(X509_EXTENSION_get_object(ext));
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if (nid == NID_freshest_crl)
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crl->flags |= EXFLAG_FRESHEST;
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if (X509_EXTENSION_get_critical(ext)) {
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/* We handle IDP and deltas */
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if ((nid == NID_issuing_distribution_point)
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|| (nid == NID_authority_key_identifier)
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|| (nid == NID_delta_crl))
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continue;
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crl->flags |= EXFLAG_CRITICAL;
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break;
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}
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}
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if (!crl_set_issuers(crl))
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return 0;
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if (crl->meth->crl_init) {
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if (crl->meth->crl_init(crl) == 0)
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return 0;
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}
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crl->flags |= EXFLAG_SET;
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break;
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case ASN1_OP_FREE_POST:
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if (crl->meth->crl_free) {
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if (!crl->meth->crl_free(crl))
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return 0;
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}
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AUTHORITY_KEYID_free(crl->akid);
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ISSUING_DIST_POINT_free(crl->idp);
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ASN1_INTEGER_free(crl->crl_number);
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ASN1_INTEGER_free(crl->base_crl_number);
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sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
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break;
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}
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return 1;
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}
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/* Convert IDP into a more convenient form */
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static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
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{
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int idp_only = 0;
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/* Set various flags according to IDP */
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crl->idp_flags |= IDP_PRESENT;
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if (idp->onlyuser > 0) {
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idp_only++;
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crl->idp_flags |= IDP_ONLYUSER;
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}
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if (idp->onlyCA > 0) {
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idp_only++;
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crl->idp_flags |= IDP_ONLYCA;
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}
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if (idp->onlyattr > 0) {
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idp_only++;
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crl->idp_flags |= IDP_ONLYATTR;
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}
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if (idp_only > 1)
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crl->idp_flags |= IDP_INVALID;
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if (idp->indirectCRL > 0)
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crl->idp_flags |= IDP_INDIRECT;
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if (idp->onlysomereasons) {
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crl->idp_flags |= IDP_REASONS;
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if (idp->onlysomereasons->length > 0)
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crl->idp_reasons = idp->onlysomereasons->data[0];
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if (idp->onlysomereasons->length > 1)
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crl->idp_reasons |= (idp->onlysomereasons->data[1] << 8);
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crl->idp_reasons &= CRLDP_ALL_REASONS;
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}
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DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
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}
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ASN1_SEQUENCE_ref(X509_CRL, crl_cb) = {
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ASN1_EMBED(X509_CRL, crl, X509_CRL_INFO),
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ASN1_EMBED(X509_CRL, sig_alg, X509_ALGOR),
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ASN1_EMBED(X509_CRL, signature, ASN1_BIT_STRING)
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} ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
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IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
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IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED)
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IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
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IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
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IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
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static int X509_REVOKED_cmp(const X509_REVOKED *const *a,
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const X509_REVOKED *const *b)
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{
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return (ASN1_STRING_cmp((ASN1_STRING *)&(*a)->serialNumber,
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(ASN1_STRING *)&(*b)->serialNumber));
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}
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int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
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{
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X509_CRL_INFO *inf;
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inf = &crl->crl;
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if (inf->revoked == NULL)
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inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
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if (inf->revoked == NULL || !sk_X509_REVOKED_push(inf->revoked, rev)) {
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ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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inf->enc.modified = 1;
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return 1;
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}
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int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
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{
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if (crl->meth->crl_verify)
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return crl->meth->crl_verify(crl, r);
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return 0;
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}
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int X509_CRL_get0_by_serial(X509_CRL *crl,
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X509_REVOKED **ret, ASN1_INTEGER *serial)
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{
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if (crl->meth->crl_lookup)
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return crl->meth->crl_lookup(crl, ret, serial, NULL);
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return 0;
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}
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int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x)
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{
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if (crl->meth->crl_lookup)
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return crl->meth->crl_lookup(crl, ret,
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X509_get_serialNumber(x),
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X509_get_issuer_name(x));
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return 0;
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}
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static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r)
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{
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return (ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
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&crl->sig_alg, &crl->signature, &crl->crl, r));
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}
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static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm,
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X509_REVOKED *rev)
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{
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int i;
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if (!rev->issuer) {
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if (!nm)
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return 1;
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if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
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return 1;
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return 0;
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}
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if (!nm)
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nm = X509_CRL_get_issuer(crl);
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for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++) {
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GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i);
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if (gen->type != GEN_DIRNAME)
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continue;
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if (!X509_NAME_cmp(nm, gen->d.directoryName))
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return 1;
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}
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return 0;
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}
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static int def_crl_lookup(X509_CRL *crl,
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X509_REVOKED **ret, ASN1_INTEGER *serial,
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X509_NAME *issuer)
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{
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X509_REVOKED rtmp, *rev;
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int idx, num;
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if (crl->crl.revoked == NULL)
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return 0;
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/*
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* Sort revoked into serial number order if not already sorted. Do this
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* under a lock to avoid race condition.
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*/
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if (!sk_X509_REVOKED_is_sorted(crl->crl.revoked)) {
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CRYPTO_THREAD_write_lock(crl->lock);
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sk_X509_REVOKED_sort(crl->crl.revoked);
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CRYPTO_THREAD_unlock(crl->lock);
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}
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rtmp.serialNumber = *serial;
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idx = sk_X509_REVOKED_find(crl->crl.revoked, &rtmp);
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if (idx < 0)
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return 0;
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/* Need to look for matching name */
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for (num = sk_X509_REVOKED_num(crl->crl.revoked); idx < num; idx++) {
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rev = sk_X509_REVOKED_value(crl->crl.revoked, idx);
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if (ASN1_INTEGER_cmp(&rev->serialNumber, serial))
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return 0;
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if (crl_revoked_issuer_match(crl, issuer, rev)) {
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if (ret)
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*ret = rev;
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if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
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return 2;
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return 1;
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}
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}
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return 0;
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}
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void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
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{
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if (meth == NULL)
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default_crl_method = &int_crl_meth;
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else
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default_crl_method = meth;
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}
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X509_CRL_METHOD *X509_CRL_METHOD_new(int (*crl_init) (X509_CRL *crl),
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int (*crl_free) (X509_CRL *crl),
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int (*crl_lookup) (X509_CRL *crl,
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X509_REVOKED **ret,
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ASN1_INTEGER *ser,
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X509_NAME *issuer),
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int (*crl_verify) (X509_CRL *crl,
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EVP_PKEY *pk))
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{
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X509_CRL_METHOD *m = OPENSSL_malloc(sizeof(*m));
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if (m == NULL) {
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X509err(X509_F_X509_CRL_METHOD_NEW, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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m->crl_init = crl_init;
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m->crl_free = crl_free;
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m->crl_lookup = crl_lookup;
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m->crl_verify = crl_verify;
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m->flags = X509_CRL_METHOD_DYNAMIC;
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return m;
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}
|
|
|
|
void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
|
|
{
|
|
if (m == NULL || !(m->flags & X509_CRL_METHOD_DYNAMIC))
|
|
return;
|
|
OPENSSL_free(m);
|
|
}
|
|
|
|
void X509_CRL_set_meth_data(X509_CRL *crl, void *dat)
|
|
{
|
|
crl->meth_data = dat;
|
|
}
|
|
|
|
void *X509_CRL_get_meth_data(X509_CRL *crl)
|
|
{
|
|
return crl->meth_data;
|
|
}
|