--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <string.h>
+#include <time.h>
+
+#include <openssl/asn1.h>
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/mem.h>
+#include <openssl/obj.h>
+#include <openssl/thread.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+
+#include "vpm_int.h"
+#include "../internal.h"
+
+static CRYPTO_EX_DATA_CLASS g_ex_data_class =
+ CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA;
+
+/* CRL score values */
+
+/* No unhandled critical extensions */
+
+#define CRL_SCORE_NOCRITICAL 0x100
+
+/* certificate is within CRL scope */
+
+#define CRL_SCORE_SCOPE 0x080
+
+/* CRL times valid */
+
+#define CRL_SCORE_TIME 0x040
+
+/* Issuer name matches certificate */
+
+#define CRL_SCORE_ISSUER_NAME 0x020
+
+/* If this score or above CRL is probably valid */
+
+#define CRL_SCORE_VALID (CRL_SCORE_NOCRITICAL|CRL_SCORE_TIME|CRL_SCORE_SCOPE)
+
+/* CRL issuer is certificate issuer */
+
+#define CRL_SCORE_ISSUER_CERT 0x018
+
+/* CRL issuer is on certificate path */
+
+#define CRL_SCORE_SAME_PATH 0x008
+
+/* CRL issuer matches CRL AKID */
+
+#define CRL_SCORE_AKID 0x004
+
+/* Have a delta CRL with valid times */
+
+#define CRL_SCORE_TIME_DELTA 0x002
+
+static int null_callback(int ok, X509_STORE_CTX *e);
+static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
+static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x);
+static int check_chain_extensions(X509_STORE_CTX *ctx);
+static int check_name_constraints(X509_STORE_CTX *ctx);
+static int check_id(X509_STORE_CTX *ctx);
+static int check_trust(X509_STORE_CTX *ctx);
+static int check_revocation(X509_STORE_CTX *ctx);
+static int check_cert(X509_STORE_CTX *ctx);
+static int check_policy(X509_STORE_CTX *ctx);
+
+static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
+ unsigned int *preasons, X509_CRL *crl, X509 *x);
+static int get_crl_delta(X509_STORE_CTX *ctx,
+ X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x);
+static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl,
+ int *pcrl_score, X509_CRL *base,
+ STACK_OF(X509_CRL) *crls);
+static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl, X509 **pissuer,
+ int *pcrl_score);
+static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
+ unsigned int *preasons);
+static int check_crl_path(X509_STORE_CTX *ctx, X509 *x);
+static int check_crl_chain(X509_STORE_CTX *ctx,
+ STACK_OF(X509) *cert_path,
+ STACK_OF(X509) *crl_path);
+
+static int internal_verify(X509_STORE_CTX *ctx);
+
+static int null_callback(int ok, X509_STORE_CTX *e)
+{
+ return ok;
+}
+
+/* Return 1 is a certificate is self signed */
+static int cert_self_signed(X509 *x)
+{
+ X509_check_purpose(x, -1, 0);
+ if (x->ex_flags & EXFLAG_SS)
+ return 1;
+ else
+ return 0;
+}
+
+/* Given a certificate try and find an exact match in the store */
+
+static X509 *lookup_cert_match(X509_STORE_CTX *ctx, X509 *x)
+{
+ STACK_OF(X509) *certs;
+ X509 *xtmp = NULL;
+ size_t i;
+ /* Lookup all certs with matching subject name */
+ certs = ctx->lookup_certs(ctx, X509_get_subject_name(x));
+ if (certs == NULL)
+ return NULL;
+ /* Look for exact match */
+ for (i = 0; i < sk_X509_num(certs); i++) {
+ xtmp = sk_X509_value(certs, i);
+ if (!X509_cmp(xtmp, x))
+ break;
+ }
+ if (i < sk_X509_num(certs))
+ X509_up_ref(xtmp);
+ else
+ xtmp = NULL;
+ sk_X509_pop_free(certs, X509_free);
+ return xtmp;
+}
+
+int X509_verify_cert(X509_STORE_CTX *ctx)
+{
+ X509 *x, *xtmp, *xtmp2, *chain_ss = NULL;
+ int bad_chain = 0;
+ X509_VERIFY_PARAM *param = ctx->param;
+ int depth, i, ok = 0;
+ int num, j, retry, trust;
+ int (*cb) (int xok, X509_STORE_CTX *xctx);
+ STACK_OF(X509) *sktmp = NULL;
+ if (ctx->cert == NULL) {
+ OPENSSL_PUT_ERROR(X509, X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
+ ctx->error = X509_V_ERR_INVALID_CALL;
+ return -1;
+ }
+ if (ctx->chain != NULL) {
+ /*
+ * This X509_STORE_CTX has already been used to verify a cert. We
+ * cannot do another one.
+ */
+ OPENSSL_PUT_ERROR(X509, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ctx->error = X509_V_ERR_INVALID_CALL;
+ return -1;
+ }
+
+ cb = ctx->verify_cb;
+
+ /*
+ * first we make sure the chain we are going to build is present and that
+ * the first entry is in place
+ */
+ ctx->chain = sk_X509_new_null();
+ if (ctx->chain == NULL || !sk_X509_push(ctx->chain, ctx->cert)) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ goto end;
+ }
+ X509_up_ref(ctx->cert);
+ ctx->last_untrusted = 1;
+
+ /* We use a temporary STACK so we can chop and hack at it.
+ * sktmp = ctx->untrusted ++ ctx->ctx->additional_untrusted */
+ if (ctx->untrusted != NULL
+ && (sktmp = sk_X509_dup(ctx->untrusted)) == NULL) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ goto end;
+ }
+
+ if (ctx->ctx->additional_untrusted != NULL) {
+ if (sktmp == NULL) {
+ sktmp = sk_X509_new_null();
+ if (sktmp == NULL) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ goto end;
+ }
+ }
+
+ for (size_t k = 0; k < sk_X509_num(ctx->ctx->additional_untrusted);
+ k++) {
+ if (!sk_X509_push(sktmp,
+ sk_X509_value(ctx->ctx->additional_untrusted,
+ k))) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ goto end;
+ }
+ }
+ }
+
+ num = sk_X509_num(ctx->chain);
+ x = sk_X509_value(ctx->chain, num - 1);
+ depth = param->depth;
+
+ for (;;) {
+ /* If we have enough, we break */
+ if (depth < num)
+ break; /* FIXME: If this happens, we should take
+ * note of it and, if appropriate, use the
+ * X509_V_ERR_CERT_CHAIN_TOO_LONG error code
+ * later. */
+
+ /* If we are self signed, we break */
+ if (cert_self_signed(x))
+ break;
+ /*
+ * If asked see if we can find issuer in trusted store first
+ */
+ if (ctx->param->flags & X509_V_FLAG_TRUSTED_FIRST) {
+ ok = ctx->get_issuer(&xtmp, ctx, x);
+ if (ok < 0) {
+ ctx->error = X509_V_ERR_STORE_LOOKUP;
+ goto end;
+ }
+ /*
+ * If successful for now free up cert so it will be picked up
+ * again later.
+ */
+ if (ok > 0) {
+ X509_free(xtmp);
+ break;
+ }
+ }
+
+ /* If we were passed a cert chain, use it first */
+ if (sktmp != NULL) {
+ xtmp = find_issuer(ctx, sktmp, x);
+ if (xtmp != NULL) {
+ if (!sk_X509_push(ctx->chain, xtmp)) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ ok = 0;
+ goto end;
+ }
+ X509_up_ref(xtmp);
+ (void)sk_X509_delete_ptr(sktmp, xtmp);
+ ctx->last_untrusted++;
+ x = xtmp;
+ num++;
+ /*
+ * reparse the full chain for the next one
+ */
+ continue;
+ }
+ }
+ break;
+ }
+
+ /* Remember how many untrusted certs we have */
+ j = num;
+ /*
+ * at this point, chain should contain a list of untrusted certificates.
+ * We now need to add at least one trusted one, if possible, otherwise we
+ * complain.
+ */
+
+ do {
+ /*
+ * Examine last certificate in chain and see if it is self signed.
+ */
+ i = sk_X509_num(ctx->chain);
+ x = sk_X509_value(ctx->chain, i - 1);
+ if (cert_self_signed(x)) {
+ /* we have a self signed certificate */
+ if (sk_X509_num(ctx->chain) == 1) {
+ /*
+ * We have a single self signed certificate: see if we can
+ * find it in the store. We must have an exact match to avoid
+ * possible impersonation.
+ */
+ ok = ctx->get_issuer(&xtmp, ctx, x);
+ if ((ok <= 0) || X509_cmp(x, xtmp)) {
+ ctx->error = X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
+ ctx->current_cert = x;
+ ctx->error_depth = i - 1;
+ if (ok == 1)
+ X509_free(xtmp);
+ bad_chain = 1;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ } else {
+ /*
+ * We have a match: replace certificate with store
+ * version so we get any trust settings.
+ */
+ X509_free(x);
+ x = xtmp;
+ (void)sk_X509_set(ctx->chain, i - 1, x);
+ ctx->last_untrusted = 0;
+ }
+ } else {
+ /*
+ * extract and save self signed certificate for later use
+ */
+ chain_ss = sk_X509_pop(ctx->chain);
+ ctx->last_untrusted--;
+ num--;
+ j--;
+ x = sk_X509_value(ctx->chain, num - 1);
+ }
+ }
+ /* We now lookup certs from the certificate store */
+ for (;;) {
+ /* If we have enough, we break */
+ if (depth < num)
+ break;
+ /* If we are self signed, we break */
+ if (cert_self_signed(x))
+ break;
+ ok = ctx->get_issuer(&xtmp, ctx, x);
+
+ if (ok < 0) {
+ ctx->error = X509_V_ERR_STORE_LOOKUP;
+ goto end;
+ }
+ if (ok == 0)
+ break;
+ x = xtmp;
+ if (!sk_X509_push(ctx->chain, x)) {
+ X509_free(xtmp);
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ ok = 0;
+ goto end;
+ }
+ num++;
+ }
+
+ /* we now have our chain, lets check it... */
+ trust = check_trust(ctx);
+
+ /* If explicitly rejected error */
+ if (trust == X509_TRUST_REJECTED) {
+ ok = 0;
+ goto end;
+ }
+ /*
+ * If it's not explicitly trusted then check if there is an alternative
+ * chain that could be used. We only do this if we haven't already
+ * checked via TRUSTED_FIRST and the user hasn't switched off alternate
+ * chain checking
+ */
+ retry = 0;
+ if (trust != X509_TRUST_TRUSTED
+ && !(ctx->param->flags & X509_V_FLAG_TRUSTED_FIRST)
+ && !(ctx->param->flags & X509_V_FLAG_NO_ALT_CHAINS)) {
+ while (j-- > 1) {
+ xtmp2 = sk_X509_value(ctx->chain, j - 1);
+ ok = ctx->get_issuer(&xtmp, ctx, xtmp2);
+ if (ok < 0)
+ goto end;
+ /* Check if we found an alternate chain */
+ if (ok > 0) {
+ /*
+ * Free up the found cert we'll add it again later
+ */
+ X509_free(xtmp);
+
+ /*
+ * Dump all the certs above this point - we've found an
+ * alternate chain
+ */
+ while (num > j) {
+ xtmp = sk_X509_pop(ctx->chain);
+ X509_free(xtmp);
+ num--;
+ }
+ ctx->last_untrusted = sk_X509_num(ctx->chain);
+ retry = 1;
+ break;
+ }
+ }
+ }
+ } while (retry);
+
+ /*
+ * If not explicitly trusted then indicate error unless it's a single
+ * self signed certificate in which case we've indicated an error already
+ * and set bad_chain == 1
+ */
+ if (trust != X509_TRUST_TRUSTED && !bad_chain) {
+ if ((chain_ss == NULL) || !ctx->check_issued(ctx, x, chain_ss)) {
+ if (ctx->last_untrusted >= num)
+ ctx->error = X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
+ else
+ ctx->error = X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
+ ctx->current_cert = x;
+ } else {
+
+ sk_X509_push(ctx->chain, chain_ss);
+ num++;
+ ctx->last_untrusted = num;
+ ctx->current_cert = chain_ss;
+ ctx->error = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
+ chain_ss = NULL;
+ }
+
+ ctx->error_depth = num - 1;
+ bad_chain = 1;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+
+ /* We have the chain complete: now we need to check its purpose */
+ ok = check_chain_extensions(ctx);
+
+ if (!ok)
+ goto end;
+
+ ok = check_id(ctx);
+
+ if (!ok)
+ goto end;
+
+ /*
+ * Check revocation status: we do this after copying parameters because
+ * they may be needed for CRL signature verification.
+ */
+
+ ok = ctx->check_revocation(ctx);
+ if (!ok)
+ goto end;
+
+ int err = X509_chain_check_suiteb(&ctx->error_depth, NULL, ctx->chain,
+ ctx->param->flags);
+ if (err != X509_V_OK) {
+ ctx->error = err;
+ ctx->current_cert = sk_X509_value(ctx->chain, ctx->error_depth);
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+
+ /* At this point, we have a chain and need to verify it */
+ if (ctx->verify != NULL)
+ ok = ctx->verify(ctx);
+ else
+ ok = internal_verify(ctx);
+ if (!ok)
+ goto end;
+
+ /* Check name constraints */
+
+ ok = check_name_constraints(ctx);
+ if (!ok)
+ goto end;
+
+ /* If we get this far evaluate policies */
+ if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK))
+ ok = ctx->check_policy(ctx);
+
+ end:
+ if (sktmp != NULL)
+ sk_X509_free(sktmp);
+ if (chain_ss != NULL)
+ X509_free(chain_ss);
+
+ /* Safety net, error returns must set ctx->error */
+ if (ok <= 0 && ctx->error == X509_V_OK)
+ ctx->error = X509_V_ERR_UNSPECIFIED;
+ return ok;
+}
+
+/*
+ * Given a STACK_OF(X509) find the issuer of cert (if any)
+ */
+
+static X509 *find_issuer(X509_STORE_CTX *ctx, STACK_OF(X509) *sk, X509 *x)
+{
+ size_t i;
+ X509 *issuer;
+ for (i = 0; i < sk_X509_num(sk); i++) {
+ issuer = sk_X509_value(sk, i);
+ if (ctx->check_issued(ctx, x, issuer))
+ return issuer;
+ }
+ return NULL;
+}
+
+/* Given a possible certificate and issuer check them */
+
+static int check_issued(X509_STORE_CTX *ctx, X509 *x, X509 *issuer)
+{
+ int ret;
+ ret = X509_check_issued(issuer, x);
+ if (ret == X509_V_OK)
+ return 1;
+ /* If we haven't asked for issuer errors don't set ctx */
+ if (!(ctx->param->flags & X509_V_FLAG_CB_ISSUER_CHECK))
+ return 0;
+
+ ctx->error = ret;
+ ctx->current_cert = x;
+ ctx->current_issuer = issuer;
+ return ctx->verify_cb(0, ctx);
+}
+
+/* Alternative lookup method: look from a STACK stored in other_ctx */
+
+static int get_issuer_sk(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
+{
+ *issuer = find_issuer(ctx, ctx->other_ctx, x);
+ if (*issuer) {
+ X509_up_ref(*issuer);
+ return 1;
+ } else
+ return 0;
+}
+
+/*
+ * Check a certificate chains extensions for consistency with the supplied
+ * purpose
+ */
+
+static int check_chain_extensions(X509_STORE_CTX *ctx)
+{
+ int i, ok = 0, must_be_ca, plen = 0;
+ X509 *x;
+ int (*cb) (int xok, X509_STORE_CTX *xctx);
+ int proxy_path_length = 0;
+ int purpose;
+ int allow_proxy_certs;
+ cb = ctx->verify_cb;
+
+ /*
+ * must_be_ca can have 1 of 3 values: -1: we accept both CA and non-CA
+ * certificates, to allow direct use of self-signed certificates (which
+ * are marked as CA). 0: we only accept non-CA certificates. This is
+ * currently not used, but the possibility is present for future
+ * extensions. 1: we only accept CA certificates. This is currently used
+ * for all certificates in the chain except the leaf certificate.
+ */
+ must_be_ca = -1;
+
+ /* CRL path validation */
+ if (ctx->parent) {
+ allow_proxy_certs = 0;
+ purpose = X509_PURPOSE_CRL_SIGN;
+ } else {
+ allow_proxy_certs =
+ ! !(ctx->param->flags & X509_V_FLAG_ALLOW_PROXY_CERTS);
+ purpose = ctx->param->purpose;
+ }
+
+ /* Check all untrusted certificates */
+ for (i = 0; i < ctx->last_untrusted; i++) {
+ int ret;
+ x = sk_X509_value(ctx->chain, i);
+ if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
+ && (x->ex_flags & EXFLAG_CRITICAL)) {
+ ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ if (!allow_proxy_certs && (x->ex_flags & EXFLAG_PROXY)) {
+ ctx->error = X509_V_ERR_PROXY_CERTIFICATES_NOT_ALLOWED;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ ret = X509_check_ca(x);
+ switch (must_be_ca) {
+ case -1:
+ if ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
+ && (ret != 1) && (ret != 0)) {
+ ret = 0;
+ ctx->error = X509_V_ERR_INVALID_CA;
+ } else
+ ret = 1;
+ break;
+ case 0:
+ if (ret != 0) {
+ ret = 0;
+ ctx->error = X509_V_ERR_INVALID_NON_CA;
+ } else
+ ret = 1;
+ break;
+ default:
+ if ((ret == 0)
+ || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
+ && (ret != 1))) {
+ ret = 0;
+ ctx->error = X509_V_ERR_INVALID_CA;
+ } else
+ ret = 1;
+ break;
+ }
+ if (ret == 0) {
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ if (ctx->param->purpose > 0) {
+ ret = X509_check_purpose(x, purpose, must_be_ca > 0);
+ if ((ret == 0)
+ || ((ctx->param->flags & X509_V_FLAG_X509_STRICT)
+ && (ret != 1))) {
+ ctx->error = X509_V_ERR_INVALID_PURPOSE;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ }
+ /* Check pathlen if not self issued */
+ if ((i > 1) && !(x->ex_flags & EXFLAG_SI)
+ && (x->ex_pathlen != -1)
+ && (plen > (x->ex_pathlen + proxy_path_length + 1))) {
+ ctx->error = X509_V_ERR_PATH_LENGTH_EXCEEDED;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ /* Increment path length if not self issued */
+ if (!(x->ex_flags & EXFLAG_SI))
+ plen++;
+ /*
+ * If this certificate is a proxy certificate, the next certificate
+ * must be another proxy certificate or a EE certificate. If not,
+ * the next certificate must be a CA certificate.
+ */
+ if (x->ex_flags & EXFLAG_PROXY) {
+ if (x->ex_pcpathlen != -1 && i > x->ex_pcpathlen) {
+ ctx->error = X509_V_ERR_PROXY_PATH_LENGTH_EXCEEDED;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ok = cb(0, ctx);
+ if (!ok)
+ goto end;
+ }
+ proxy_path_length++;
+ must_be_ca = 0;
+ } else
+ must_be_ca = 1;
+ }
+ ok = 1;
+ end:
+ return ok;
+}
+
+static int check_name_constraints(X509_STORE_CTX *ctx)
+{
+ X509 *x;
+ int i, j, rv;
+ /* Check name constraints for all certificates */
+ for (i = sk_X509_num(ctx->chain) - 1; i >= 0; i--) {
+ x = sk_X509_value(ctx->chain, i);
+ /* Ignore self issued certs unless last in chain */
+ if (i && (x->ex_flags & EXFLAG_SI))
+ continue;
+ /*
+ * Check against constraints for all certificates higher in chain
+ * including trust anchor. Trust anchor not strictly speaking needed
+ * but if it includes constraints it is to be assumed it expects them
+ * to be obeyed.
+ */
+ for (j = sk_X509_num(ctx->chain) - 1; j > i; j--) {
+ NAME_CONSTRAINTS *nc = sk_X509_value(ctx->chain, j)->nc;
+ if (nc) {
+ rv = NAME_CONSTRAINTS_check(x, nc);
+ switch (rv) {
+ case X509_V_OK:
+ continue;
+ case X509_V_ERR_OUT_OF_MEM:
+ ctx->error = rv;
+ return 0;
+ default:
+ ctx->error = rv;
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ break;
+ }
+ }
+ }
+ }
+ return 1;
+}
+
+static int check_id_error(X509_STORE_CTX *ctx, int errcode)
+{
+ ctx->error = errcode;
+ ctx->current_cert = ctx->cert;
+ ctx->error_depth = 0;
+ return ctx->verify_cb(0, ctx);
+}
+
+static int check_hosts(X509 *x, X509_VERIFY_PARAM_ID *id)
+{
+ size_t i;
+ size_t n = sk_OPENSSL_STRING_num(id->hosts);
+ char *name;
+
+ if (id->peername != NULL) {
+ OPENSSL_free(id->peername);
+ id->peername = NULL;
+ }
+ for (i = 0; i < n; ++i) {
+ name = sk_OPENSSL_STRING_value(id->hosts, i);
+ if (X509_check_host(x, name, strlen(name), id->hostflags,
+ &id->peername) > 0)
+ return 1;
+ }
+ return n == 0;
+}
+
+static int check_id(X509_STORE_CTX *ctx)
+{
+ X509_VERIFY_PARAM *vpm = ctx->param;
+ X509_VERIFY_PARAM_ID *id = vpm->id;
+ X509 *x = ctx->cert;
+ if (id->poison) {
+ if (!check_id_error(ctx, X509_V_ERR_INVALID_CALL))
+ return 0;
+ }
+ if (id->hosts && check_hosts(x, id) <= 0) {
+ if (!check_id_error(ctx, X509_V_ERR_HOSTNAME_MISMATCH))
+ return 0;
+ }
+ if (id->email && X509_check_email(x, id->email, id->emaillen, 0) <= 0) {
+ if (!check_id_error(ctx, X509_V_ERR_EMAIL_MISMATCH))
+ return 0;
+ }
+ if (id->ip && X509_check_ip(x, id->ip, id->iplen, 0) <= 0) {
+ if (!check_id_error(ctx, X509_V_ERR_IP_ADDRESS_MISMATCH))
+ return 0;
+ }
+ return 1;
+}
+
+static int check_trust(X509_STORE_CTX *ctx)
+{
+ size_t i;
+ int ok;
+ X509 *x = NULL;
+ int (*cb) (int xok, X509_STORE_CTX *xctx);
+ cb = ctx->verify_cb;
+ /* Check all trusted certificates in chain */
+ for (i = ctx->last_untrusted; i < sk_X509_num(ctx->chain); i++) {
+ x = sk_X509_value(ctx->chain, i);
+ ok = X509_check_trust(x, ctx->param->trust, 0);
+ /* If explicitly trusted return trusted */
+ if (ok == X509_TRUST_TRUSTED)
+ return X509_TRUST_TRUSTED;
+ /*
+ * If explicitly rejected notify callback and reject if not
+ * overridden.
+ */
+ if (ok == X509_TRUST_REJECTED) {
+ ctx->error_depth = i;
+ ctx->current_cert = x;
+ ctx->error = X509_V_ERR_CERT_REJECTED;
+ ok = cb(0, ctx);
+ if (!ok)
+ return X509_TRUST_REJECTED;
+ }
+ }
+ /*
+ * If we accept partial chains and have at least one trusted certificate
+ * return success.
+ */
+ if (ctx->param->flags & X509_V_FLAG_PARTIAL_CHAIN) {
+ X509 *mx;
+ if (ctx->last_untrusted < (int)sk_X509_num(ctx->chain))
+ return X509_TRUST_TRUSTED;
+ x = sk_X509_value(ctx->chain, 0);
+ mx = lookup_cert_match(ctx, x);
+ if (mx) {
+ (void)sk_X509_set(ctx->chain, 0, mx);
+ X509_free(x);
+ ctx->last_untrusted = 0;
+ return X509_TRUST_TRUSTED;
+ }
+ }
+
+ /*
+ * If no trusted certs in chain at all return untrusted and allow
+ * standard (no issuer cert) etc errors to be indicated.
+ */
+ return X509_TRUST_UNTRUSTED;
+}
+
+static int check_revocation(X509_STORE_CTX *ctx)
+{
+ int i, last, ok;
+ if (!(ctx->param->flags & X509_V_FLAG_CRL_CHECK))
+ return 1;
+ if (ctx->param->flags & X509_V_FLAG_CRL_CHECK_ALL)
+ last = sk_X509_num(ctx->chain) - 1;
+ else {
+ /* If checking CRL paths this isn't the EE certificate */
+ if (ctx->parent)
+ return 1;
+ last = 0;
+ }
+ for (i = 0; i <= last; i++) {
+ ctx->error_depth = i;
+ ok = check_cert(ctx);
+ if (!ok)
+ return ok;
+ }
+ return 1;
+}
+
+static int check_cert(X509_STORE_CTX *ctx)
+{
+ X509_CRL *crl = NULL, *dcrl = NULL;
+ X509 *x;
+ int ok = 0, cnum;
+ unsigned int last_reasons;
+ cnum = ctx->error_depth;
+ x = sk_X509_value(ctx->chain, cnum);
+ ctx->current_cert = x;
+ ctx->current_issuer = NULL;
+ ctx->current_crl_score = 0;
+ ctx->current_reasons = 0;
+ while (ctx->current_reasons != CRLDP_ALL_REASONS) {
+ last_reasons = ctx->current_reasons;
+ /* Try to retrieve relevant CRL */
+ if (ctx->get_crl)
+ ok = ctx->get_crl(ctx, &crl, x);
+ else
+ ok = get_crl_delta(ctx, &crl, &dcrl, x);
+ /*
+ * If error looking up CRL, nothing we can do except notify callback
+ */
+ if (!ok) {
+ ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
+ ok = ctx->verify_cb(0, ctx);
+ goto err;
+ }
+ ctx->current_crl = crl;
+ ok = ctx->check_crl(ctx, crl);
+ if (!ok)
+ goto err;
+
+ if (dcrl) {
+ ok = ctx->check_crl(ctx, dcrl);
+ if (!ok)
+ goto err;
+ ok = ctx->cert_crl(ctx, dcrl, x);
+ if (!ok)
+ goto err;
+ } else
+ ok = 1;
+
+ /* Don't look in full CRL if delta reason is removefromCRL */
+ if (ok != 2) {
+ ok = ctx->cert_crl(ctx, crl, x);
+ if (!ok)
+ goto err;
+ }
+
+ X509_CRL_free(crl);
+ X509_CRL_free(dcrl);
+ crl = NULL;
+ dcrl = NULL;
+ /*
+ * If reasons not updated we wont get anywhere by another iteration,
+ * so exit loop.
+ */
+ if (last_reasons == ctx->current_reasons) {
+ ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL;
+ ok = ctx->verify_cb(0, ctx);
+ goto err;
+ }
+ }
+ err:
+ X509_CRL_free(crl);
+ X509_CRL_free(dcrl);
+
+ ctx->current_crl = NULL;
+ return ok;
+
+}
+
+/* Check CRL times against values in X509_STORE_CTX */
+
+static int check_crl_time(X509_STORE_CTX *ctx, X509_CRL *crl, int notify)
+{
+ time_t *ptime;
+ int i;
+ if (notify)
+ ctx->current_crl = crl;
+ if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
+ ptime = &ctx->param->check_time;
+ else
+ ptime = NULL;
+
+ i = X509_cmp_time(X509_CRL_get_lastUpdate(crl), ptime);
+ if (i == 0) {
+ if (!notify)
+ return 0;
+ ctx->error = X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+
+ if (i > 0) {
+ if (!notify)
+ return 0;
+ ctx->error = X509_V_ERR_CRL_NOT_YET_VALID;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+
+ if (X509_CRL_get_nextUpdate(crl)) {
+ i = X509_cmp_time(X509_CRL_get_nextUpdate(crl), ptime);
+
+ if (i == 0) {
+ if (!notify)
+ return 0;
+ ctx->error = X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+ /* Ignore expiry of base CRL is delta is valid */
+ if ((i < 0) && !(ctx->current_crl_score & CRL_SCORE_TIME_DELTA)) {
+ if (!notify)
+ return 0;
+ ctx->error = X509_V_ERR_CRL_HAS_EXPIRED;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+ }
+
+ if (notify)
+ ctx->current_crl = NULL;
+
+ return 1;
+}
+
+static int get_crl_sk(X509_STORE_CTX *ctx, X509_CRL **pcrl, X509_CRL **pdcrl,
+ X509 **pissuer, int *pscore, unsigned int *preasons,
+ STACK_OF(X509_CRL) *crls)
+{
+ int crl_score, best_score = *pscore;
+ size_t i;
+ unsigned int reasons, best_reasons = 0;
+ X509 *x = ctx->current_cert;
+ X509_CRL *crl, *best_crl = NULL;
+ X509 *crl_issuer = NULL, *best_crl_issuer = NULL;
+
+ for (i = 0; i < sk_X509_CRL_num(crls); i++) {
+ crl = sk_X509_CRL_value(crls, i);
+ reasons = *preasons;
+ crl_score = get_crl_score(ctx, &crl_issuer, &reasons, crl, x);
+ if (crl_score < best_score || crl_score == 0)
+ continue;
+ /* If current CRL is equivalent use it if it is newer */
+ if (crl_score == best_score && best_crl != NULL) {
+ int day, sec;
+ if (ASN1_TIME_diff(&day, &sec, X509_CRL_get_lastUpdate(best_crl),
+ X509_CRL_get_lastUpdate(crl)) == 0)
+ continue;
+ /*
+ * ASN1_TIME_diff never returns inconsistent signs for |day|
+ * and |sec|.
+ */
+ if (day <= 0 && sec <= 0)
+ continue;
+ }
+ best_crl = crl;
+ best_crl_issuer = crl_issuer;
+ best_score = crl_score;
+ best_reasons = reasons;
+ }
+
+ if (best_crl) {
+ if (*pcrl)
+ X509_CRL_free(*pcrl);
+ *pcrl = best_crl;
+ *pissuer = best_crl_issuer;
+ *pscore = best_score;
+ *preasons = best_reasons;
+ X509_CRL_up_ref(best_crl);
+ if (*pdcrl) {
+ X509_CRL_free(*pdcrl);
+ *pdcrl = NULL;
+ }
+ get_delta_sk(ctx, pdcrl, pscore, best_crl, crls);
+ }
+
+ if (best_score >= CRL_SCORE_VALID)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Compare two CRL extensions for delta checking purposes. They should be
+ * both present or both absent. If both present all fields must be identical.
+ */
+
+static int crl_extension_match(X509_CRL *a, X509_CRL *b, int nid)
+{
+ ASN1_OCTET_STRING *exta, *extb;
+ int i;
+ i = X509_CRL_get_ext_by_NID(a, nid, -1);
+ if (i >= 0) {
+ /* Can't have multiple occurrences */
+ if (X509_CRL_get_ext_by_NID(a, nid, i) != -1)
+ return 0;
+ exta = X509_EXTENSION_get_data(X509_CRL_get_ext(a, i));
+ } else
+ exta = NULL;
+
+ i = X509_CRL_get_ext_by_NID(b, nid, -1);
+
+ if (i >= 0) {
+
+ if (X509_CRL_get_ext_by_NID(b, nid, i) != -1)
+ return 0;
+ extb = X509_EXTENSION_get_data(X509_CRL_get_ext(b, i));
+ } else
+ extb = NULL;
+
+ if (!exta && !extb)
+ return 1;
+
+ if (!exta || !extb)
+ return 0;
+
+ if (ASN1_OCTET_STRING_cmp(exta, extb))
+ return 0;
+
+ return 1;
+}
+
+/* See if a base and delta are compatible */
+
+static int check_delta_base(X509_CRL *delta, X509_CRL *base)
+{
+ /* Delta CRL must be a delta */
+ if (!delta->base_crl_number)
+ return 0;
+ /* Base must have a CRL number */
+ if (!base->crl_number)
+ return 0;
+ /* Issuer names must match */
+ if (X509_NAME_cmp(X509_CRL_get_issuer(base), X509_CRL_get_issuer(delta)))
+ return 0;
+ /* AKID and IDP must match */
+ if (!crl_extension_match(delta, base, NID_authority_key_identifier))
+ return 0;
+ if (!crl_extension_match(delta, base, NID_issuing_distribution_point))
+ return 0;
+ /* Delta CRL base number must not exceed Full CRL number. */
+ if (ASN1_INTEGER_cmp(delta->base_crl_number, base->crl_number) > 0)
+ return 0;
+ /* Delta CRL number must exceed full CRL number */
+ if (ASN1_INTEGER_cmp(delta->crl_number, base->crl_number) > 0)
+ return 1;
+ return 0;
+}
+
+/*
+ * For a given base CRL find a delta... maybe extend to delta scoring or
+ * retrieve a chain of deltas...
+ */
+
+static void get_delta_sk(X509_STORE_CTX *ctx, X509_CRL **dcrl, int *pscore,
+ X509_CRL *base, STACK_OF(X509_CRL) *crls)
+{
+ X509_CRL *delta;
+ size_t i;
+ if (!(ctx->param->flags & X509_V_FLAG_USE_DELTAS))
+ return;
+ if (!((ctx->current_cert->ex_flags | base->flags) & EXFLAG_FRESHEST))
+ return;
+ for (i = 0; i < sk_X509_CRL_num(crls); i++) {
+ delta = sk_X509_CRL_value(crls, i);
+ if (check_delta_base(delta, base)) {
+ if (check_crl_time(ctx, delta, 0))
+ *pscore |= CRL_SCORE_TIME_DELTA;
+ X509_CRL_up_ref(delta);
+ *dcrl = delta;
+ return;
+ }
+ }
+ *dcrl = NULL;
+}
+
+/*
+ * For a given CRL return how suitable it is for the supplied certificate
+ * 'x'. The return value is a mask of several criteria. If the issuer is not
+ * the certificate issuer this is returned in *pissuer. The reasons mask is
+ * also used to determine if the CRL is suitable: if no new reasons the CRL
+ * is rejected, otherwise reasons is updated.
+ */
+
+static int get_crl_score(X509_STORE_CTX *ctx, X509 **pissuer,
+ unsigned int *preasons, X509_CRL *crl, X509 *x)
+{
+
+ int crl_score = 0;
+ unsigned int tmp_reasons = *preasons, crl_reasons;
+
+ /* First see if we can reject CRL straight away */
+
+ /* Invalid IDP cannot be processed */
+ if (crl->idp_flags & IDP_INVALID)
+ return 0;
+ /* Reason codes or indirect CRLs need extended CRL support */
+ if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT)) {
+ if (crl->idp_flags & (IDP_INDIRECT | IDP_REASONS))
+ return 0;
+ } else if (crl->idp_flags & IDP_REASONS) {
+ /* If no new reasons reject */
+ if (!(crl->idp_reasons & ~tmp_reasons))
+ return 0;
+ }
+ /* Don't process deltas at this stage */
+ else if (crl->base_crl_number)
+ return 0;
+ /* If issuer name doesn't match certificate need indirect CRL */
+ if (X509_NAME_cmp(X509_get_issuer_name(x), X509_CRL_get_issuer(crl))) {
+ if (!(crl->idp_flags & IDP_INDIRECT))
+ return 0;
+ } else
+ crl_score |= CRL_SCORE_ISSUER_NAME;
+
+ if (!(crl->flags & EXFLAG_CRITICAL))
+ crl_score |= CRL_SCORE_NOCRITICAL;
+
+ /* Check expiry */
+ if (check_crl_time(ctx, crl, 0))
+ crl_score |= CRL_SCORE_TIME;
+
+ /* Check authority key ID and locate certificate issuer */
+ crl_akid_check(ctx, crl, pissuer, &crl_score);
+
+ /* If we can't locate certificate issuer at this point forget it */
+
+ if (!(crl_score & CRL_SCORE_AKID))
+ return 0;
+
+ /* Check cert for matching CRL distribution points */
+
+ if (crl_crldp_check(x, crl, crl_score, &crl_reasons)) {
+ /* If no new reasons reject */
+ if (!(crl_reasons & ~tmp_reasons))
+ return 0;
+ tmp_reasons |= crl_reasons;
+ crl_score |= CRL_SCORE_SCOPE;
+ }
+
+ *preasons = tmp_reasons;
+
+ return crl_score;
+
+}
+
+static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
+ X509 **pissuer, int *pcrl_score)
+{
+ X509 *crl_issuer = NULL;
+ X509_NAME *cnm = X509_CRL_get_issuer(crl);
+ int cidx = ctx->error_depth;
+ size_t i;
+
+ if ((size_t)cidx != sk_X509_num(ctx->chain) - 1)
+ cidx++;
+
+ crl_issuer = sk_X509_value(ctx->chain, cidx);
+
+ if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK) {
+ if (*pcrl_score & CRL_SCORE_ISSUER_NAME) {
+ *pcrl_score |= CRL_SCORE_AKID | CRL_SCORE_ISSUER_CERT;
+ *pissuer = crl_issuer;
+ return;
+ }
+ }
+
+ for (cidx++; cidx < (int)sk_X509_num(ctx->chain); cidx++) {
+ crl_issuer = sk_X509_value(ctx->chain, cidx);
+ if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
+ continue;
+ if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK) {
+ *pcrl_score |= CRL_SCORE_AKID | CRL_SCORE_SAME_PATH;
+ *pissuer = crl_issuer;
+ return;
+ }
+ }
+
+ /* Anything else needs extended CRL support */
+
+ if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
+ return;
+
+ /*
+ * Otherwise the CRL issuer is not on the path. Look for it in the set of
+ * untrusted certificates.
+ */
+ for (i = 0; i < sk_X509_num(ctx->untrusted); i++) {
+ crl_issuer = sk_X509_value(ctx->untrusted, i);
+ if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
+ continue;
+ if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK) {
+ *pissuer = crl_issuer;
+ *pcrl_score |= CRL_SCORE_AKID;
+ return;
+ }
+ }
+
+ for (i = 0; i < sk_X509_num(ctx->ctx->additional_untrusted); i++) {
+ crl_issuer = sk_X509_value(ctx->ctx->additional_untrusted, i);
+ if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
+ continue;
+ if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK) {
+ *pissuer = crl_issuer;
+ *pcrl_score |= CRL_SCORE_AKID;
+ return;
+ }
+ }
+}
+
+/*
+ * Check the path of a CRL issuer certificate. This creates a new
+ * X509_STORE_CTX and populates it with most of the parameters from the
+ * parent. This could be optimised somewhat since a lot of path checking will
+ * be duplicated by the parent, but this will rarely be used in practice.
+ */
+
+static int check_crl_path(X509_STORE_CTX *ctx, X509 *x)
+{
+ X509_STORE_CTX crl_ctx;
+ int ret;
+ /* Don't allow recursive CRL path validation */
+ if (ctx->parent)
+ return 0;
+ if (!X509_STORE_CTX_init(&crl_ctx, ctx->ctx, x, ctx->untrusted))
+ return -1;
+
+ crl_ctx.crls = ctx->crls;
+ /* Copy verify params across */
+ X509_STORE_CTX_set0_param(&crl_ctx, ctx->param);
+
+ crl_ctx.parent = ctx;
+ crl_ctx.verify_cb = ctx->verify_cb;
+
+ /* Verify CRL issuer */
+ ret = X509_verify_cert(&crl_ctx);
+
+ if (ret <= 0)
+ goto err;
+
+ /* Check chain is acceptable */
+
+ ret = check_crl_chain(ctx, ctx->chain, crl_ctx.chain);
+ err:
+ X509_STORE_CTX_cleanup(&crl_ctx);
+ return ret;
+}
+
+/*
+ * RFC3280 says nothing about the relationship between CRL path and
+ * certificate path, which could lead to situations where a certificate could
+ * be revoked or validated by a CA not authorised to do so. RFC5280 is more
+ * strict and states that the two paths must end in the same trust anchor,
+ * though some discussions remain... until this is resolved we use the
+ * RFC5280 version
+ */
+
+static int check_crl_chain(X509_STORE_CTX *ctx,
+ STACK_OF(X509) *cert_path,
+ STACK_OF(X509) *crl_path)
+{
+ X509 *cert_ta, *crl_ta;
+ cert_ta = sk_X509_value(cert_path, sk_X509_num(cert_path) - 1);
+ crl_ta = sk_X509_value(crl_path, sk_X509_num(crl_path) - 1);
+ if (!X509_cmp(cert_ta, crl_ta))
+ return 1;
+ return 0;
+}
+
+/*
+ * Check for match between two dist point names: three separate cases. 1.
+ * Both are relative names and compare X509_NAME types. 2. One full, one
+ * relative. Compare X509_NAME to GENERAL_NAMES. 3. Both are full names and
+ * compare two GENERAL_NAMES. 4. One is NULL: automatic match.
+ */
+
+static int idp_check_dp(DIST_POINT_NAME *a, DIST_POINT_NAME *b)
+{
+ X509_NAME *nm = NULL;
+ GENERAL_NAMES *gens = NULL;
+ GENERAL_NAME *gena, *genb;
+ size_t i, j;
+ if (!a || !b)
+ return 1;
+ if (a->type == 1) {
+ if (!a->dpname)
+ return 0;
+ /* Case 1: two X509_NAME */
+ if (b->type == 1) {
+ if (!b->dpname)
+ return 0;
+ if (!X509_NAME_cmp(a->dpname, b->dpname))
+ return 1;
+ else
+ return 0;
+ }
+ /* Case 2: set name and GENERAL_NAMES appropriately */
+ nm = a->dpname;
+ gens = b->name.fullname;
+ } else if (b->type == 1) {
+ if (!b->dpname)
+ return 0;
+ /* Case 2: set name and GENERAL_NAMES appropriately */
+ gens = a->name.fullname;
+ nm = b->dpname;
+ }
+
+ /* Handle case 2 with one GENERAL_NAMES and one X509_NAME */
+ if (nm) {
+ for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
+ gena = sk_GENERAL_NAME_value(gens, i);
+ if (gena->type != GEN_DIRNAME)
+ continue;
+ if (!X509_NAME_cmp(nm, gena->d.directoryName))
+ return 1;
+ }
+ return 0;
+ }
+
+ /* Else case 3: two GENERAL_NAMES */
+
+ for (i = 0; i < sk_GENERAL_NAME_num(a->name.fullname); i++) {
+ gena = sk_GENERAL_NAME_value(a->name.fullname, i);
+ for (j = 0; j < sk_GENERAL_NAME_num(b->name.fullname); j++) {
+ genb = sk_GENERAL_NAME_value(b->name.fullname, j);
+ if (!GENERAL_NAME_cmp(gena, genb))
+ return 1;
+ }
+ }
+
+ return 0;
+
+}
+
+static int crldp_check_crlissuer(DIST_POINT *dp, X509_CRL *crl, int crl_score)
+{
+ size_t i;
+ X509_NAME *nm = X509_CRL_get_issuer(crl);
+ /* If no CRLissuer return is successful iff don't need a match */
+ if (!dp->CRLissuer)
+ return ! !(crl_score & CRL_SCORE_ISSUER_NAME);
+ for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++) {
+ GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
+ if (gen->type != GEN_DIRNAME)
+ continue;
+ if (!X509_NAME_cmp(gen->d.directoryName, nm))
+ return 1;
+ }
+ return 0;
+}
+
+/* Check CRLDP and IDP */
+
+static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
+ unsigned int *preasons)
+{
+ size_t i;
+ if (crl->idp_flags & IDP_ONLYATTR)
+ return 0;
+ if (x->ex_flags & EXFLAG_CA) {
+ if (crl->idp_flags & IDP_ONLYUSER)
+ return 0;
+ } else {
+ if (crl->idp_flags & IDP_ONLYCA)
+ return 0;
+ }
+ *preasons = crl->idp_reasons;
+ for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++) {
+ DIST_POINT *dp = sk_DIST_POINT_value(x->crldp, i);
+ if (crldp_check_crlissuer(dp, crl, crl_score)) {
+ if (!crl->idp || idp_check_dp(dp->distpoint, crl->idp->distpoint)) {
+ *preasons &= dp->dp_reasons;
+ return 1;
+ }
+ }
+ }
+ if ((!crl->idp || !crl->idp->distpoint)
+ && (crl_score & CRL_SCORE_ISSUER_NAME))
+ return 1;
+ return 0;
+}
+
+/*
+ * Retrieve CRL corresponding to current certificate. If deltas enabled try
+ * to find a delta CRL too
+ */
+
+static int get_crl_delta(X509_STORE_CTX *ctx,
+ X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x)
+{
+ int ok;
+ X509 *issuer = NULL;
+ int crl_score = 0;
+ unsigned int reasons;
+ X509_CRL *crl = NULL, *dcrl = NULL;
+ STACK_OF(X509_CRL) *skcrl;
+ X509_NAME *nm = X509_get_issuer_name(x);
+ reasons = ctx->current_reasons;
+ ok = get_crl_sk(ctx, &crl, &dcrl,
+ &issuer, &crl_score, &reasons, ctx->crls);
+
+ if (ok)
+ goto done;
+
+ /* Lookup CRLs from store */
+
+ skcrl = ctx->lookup_crls(ctx, nm);
+
+ /* If no CRLs found and a near match from get_crl_sk use that */
+ if (!skcrl && crl)
+ goto done;
+
+ get_crl_sk(ctx, &crl, &dcrl, &issuer, &crl_score, &reasons, skcrl);
+
+ sk_X509_CRL_pop_free(skcrl, X509_CRL_free);
+
+ done:
+
+ /* If we got any kind of CRL use it and return success */
+ if (crl) {
+ ctx->current_issuer = issuer;
+ ctx->current_crl_score = crl_score;
+ ctx->current_reasons = reasons;
+ *pcrl = crl;
+ *pdcrl = dcrl;
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Check CRL validity */
+static int check_crl(X509_STORE_CTX *ctx, X509_CRL *crl)
+{
+ X509 *issuer = NULL;
+ EVP_PKEY *ikey = NULL;
+ int ok = 0, chnum, cnum;
+ cnum = ctx->error_depth;
+ chnum = sk_X509_num(ctx->chain) - 1;
+ /* if we have an alternative CRL issuer cert use that */
+ if (ctx->current_issuer)
+ issuer = ctx->current_issuer;
+
+ /*
+ * Else find CRL issuer: if not last certificate then issuer is next
+ * certificate in chain.
+ */
+ else if (cnum < chnum)
+ issuer = sk_X509_value(ctx->chain, cnum + 1);
+ else {
+ issuer = sk_X509_value(ctx->chain, chnum);
+ /* If not self signed, can't check signature */
+ if (!ctx->check_issued(ctx, issuer, issuer)) {
+ ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+ }
+
+ if (issuer) {
+ /*
+ * Skip most tests for deltas because they have already been done
+ */
+ if (!crl->base_crl_number) {
+ /* Check for cRLSign bit if keyUsage present */
+ if ((issuer->ex_flags & EXFLAG_KUSAGE) &&
+ !(issuer->ex_kusage & KU_CRL_SIGN)) {
+ ctx->error = X509_V_ERR_KEYUSAGE_NO_CRL_SIGN;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+
+ if (!(ctx->current_crl_score & CRL_SCORE_SCOPE)) {
+ ctx->error = X509_V_ERR_DIFFERENT_CRL_SCOPE;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+
+ if (!(ctx->current_crl_score & CRL_SCORE_SAME_PATH)) {
+ if (check_crl_path(ctx, ctx->current_issuer) <= 0) {
+ ctx->error = X509_V_ERR_CRL_PATH_VALIDATION_ERROR;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+ }
+
+ if (crl->idp_flags & IDP_INVALID) {
+ ctx->error = X509_V_ERR_INVALID_EXTENSION;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+
+ }
+
+ if (!(ctx->current_crl_score & CRL_SCORE_TIME)) {
+ ok = check_crl_time(ctx, crl, 1);
+ if (!ok)
+ goto err;
+ }
+
+ /* Attempt to get issuer certificate public key */
+ ikey = X509_get_pubkey(issuer);
+
+ if (!ikey) {
+ ctx->error = X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ } else {
+ int rv;
+ rv = X509_CRL_check_suiteb(crl, ikey, ctx->param->flags);
+ if (rv != X509_V_OK) {
+ ctx->error = rv;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+ /* Verify CRL signature */
+ if (X509_CRL_verify(crl, ikey) <= 0) {
+ ctx->error = X509_V_ERR_CRL_SIGNATURE_FAILURE;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ goto err;
+ }
+ }
+ }
+
+ ok = 1;
+
+ err:
+ EVP_PKEY_free(ikey);
+ return ok;
+}
+
+/* Check certificate against CRL */
+static int cert_crl(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x)
+{
+ int ok;
+ X509_REVOKED *rev;
+ /*
+ * The rules changed for this... previously if a CRL contained unhandled
+ * critical extensions it could still be used to indicate a certificate
+ * was revoked. This has since been changed since critical extension can
+ * change the meaning of CRL entries.
+ */
+ if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
+ && (crl->flags & EXFLAG_CRITICAL)) {
+ ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ return 0;
+ }
+ /*
+ * Look for serial number of certificate in CRL If found make sure reason
+ * is not removeFromCRL.
+ */
+ if (X509_CRL_get0_by_cert(crl, &rev, x)) {
+ if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
+ return 2;
+ ctx->error = X509_V_ERR_CERT_REVOKED;
+ ok = ctx->verify_cb(0, ctx);
+ if (!ok)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int check_policy(X509_STORE_CTX *ctx)
+{
+ int ret;
+ if (ctx->parent)
+ return 1;
+ ret = X509_policy_check(&ctx->tree, &ctx->explicit_policy, ctx->chain,
+ ctx->param->policies, ctx->param->flags);
+ if (ret == 0) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ ctx->error = X509_V_ERR_OUT_OF_MEM;
+ return 0;
+ }
+ /* Invalid or inconsistent extensions */
+ if (ret == -1) {
+ /*
+ * Locate certificates with bad extensions and notify callback.
+ */
+ X509 *x;
+ size_t i;
+ for (i = 1; i < sk_X509_num(ctx->chain); i++) {
+ x = sk_X509_value(ctx->chain, i);
+ if (!(x->ex_flags & EXFLAG_INVALID_POLICY))
+ continue;
+ ctx->current_cert = x;
+ ctx->error = X509_V_ERR_INVALID_POLICY_EXTENSION;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+ return 1;
+ }
+ if (ret == -2) {
+ ctx->current_cert = NULL;
+ ctx->error = X509_V_ERR_NO_EXPLICIT_POLICY;
+ return ctx->verify_cb(0, ctx);
+ }
+
+ if (ctx->param->flags & X509_V_FLAG_NOTIFY_POLICY) {
+ ctx->current_cert = NULL;
+ /*
+ * Verification errors need to be "sticky", a callback may have allowed
+ * an SSL handshake to continue despite an error, and we must then
+ * remain in an error state. Therefore, we MUST NOT clear earlier
+ * verification errors by setting the error to X509_V_OK.
+ */
+ if (!ctx->verify_cb(2, ctx))
+ return 0;
+ }
+
+ return 1;
+}
+
+static int check_cert_time(X509_STORE_CTX *ctx, X509 *x)
+{
+ time_t *ptime;
+ int i;
+
+ if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
+ ptime = &ctx->param->check_time;
+ else
+ ptime = NULL;
+
+ i = X509_cmp_time(X509_get_notBefore(x), ptime);
+ if (i == 0) {
+ ctx->error = X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
+ ctx->current_cert = x;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+
+ if (i > 0) {
+ ctx->error = X509_V_ERR_CERT_NOT_YET_VALID;
+ ctx->current_cert = x;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+
+ i = X509_cmp_time(X509_get_notAfter(x), ptime);
+ if (i == 0) {
+ ctx->error = X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
+ ctx->current_cert = x;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+
+ if (i < 0) {
+ ctx->error = X509_V_ERR_CERT_HAS_EXPIRED;
+ ctx->current_cert = x;
+ if (!ctx->verify_cb(0, ctx))
+ return 0;
+ }
+
+ return 1;
+}
+
+static int internal_verify(X509_STORE_CTX *ctx)
+{
+ int ok = 0, n;
+ X509 *xs, *xi;
+ EVP_PKEY *pkey = NULL;
+ int (*cb) (int xok, X509_STORE_CTX *xctx);
+
+ cb = ctx->verify_cb;
+
+ n = sk_X509_num(ctx->chain);
+ ctx->error_depth = n - 1;
+ n--;
+ xi = sk_X509_value(ctx->chain, n);
+
+ if (ctx->check_issued(ctx, xi, xi))
+ xs = xi;
+ else {
+ if (ctx->param->flags & X509_V_FLAG_PARTIAL_CHAIN) {
+ xs = xi;
+ goto check_cert;
+ }
+ if (n <= 0) {
+ ctx->error = X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
+ ctx->current_cert = xi;
+ ok = cb(0, ctx);
+ goto end;
+ } else {
+ n--;
+ ctx->error_depth = n;
+ xs = sk_X509_value(ctx->chain, n);
+ }
+ }
+
+/* ctx->error=0; not needed */
+ while (n >= 0) {
+ ctx->error_depth = n;
+
+ /*
+ * Skip signature check for self signed certificates unless
+ * explicitly asked for. It doesn't add any security and just wastes
+ * time.
+ */
+ if (xs != xi || (ctx->param->flags & X509_V_FLAG_CHECK_SS_SIGNATURE)) {
+ if ((pkey = X509_get_pubkey(xi)) == NULL) {
+ ctx->error = X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
+ ctx->current_cert = xi;
+ ok = (*cb) (0, ctx);
+ if (!ok)
+ goto end;
+ } else if (X509_verify(xs, pkey) <= 0) {
+ ctx->error = X509_V_ERR_CERT_SIGNATURE_FAILURE;
+ ctx->current_cert = xs;
+ ok = (*cb) (0, ctx);
+ if (!ok) {
+ EVP_PKEY_free(pkey);
+ goto end;
+ }
+ }
+ EVP_PKEY_free(pkey);
+ pkey = NULL;
+ }
+
+ check_cert:
+ ok = check_cert_time(ctx, xs);
+ if (!ok)
+ goto end;
+
+ /* The last error (if any) is still in the error value */
+ ctx->current_issuer = xi;
+ ctx->current_cert = xs;
+ ok = (*cb) (1, ctx);
+ if (!ok)
+ goto end;
+
+ n--;
+ if (n >= 0) {
+ xi = xs;
+ xs = sk_X509_value(ctx->chain, n);
+ }
+ }
+ ok = 1;
+ end:
+ return ok;
+}
+
+int X509_cmp_current_time(const ASN1_TIME *ctm)
+{
+ return X509_cmp_time(ctm, NULL);
+}
+
+int X509_cmp_time(const ASN1_TIME *ctm, time_t *cmp_time)
+{
+ char *str;
+ ASN1_TIME atm;
+ long offset;
+ char buff1[24], buff2[24], *p;
+ int i, j, remaining;
+
+ p = buff1;
+ remaining = ctm->length;
+ str = (char *)ctm->data;
+ /*
+ * Note that the following (historical) code allows much more slack in
+ * the time format than RFC5280. In RFC5280, the representation is fixed:
+ * UTCTime: YYMMDDHHMMSSZ GeneralizedTime: YYYYMMDDHHMMSSZ
+ */
+ if (ctm->type == V_ASN1_UTCTIME) {
+ /* YYMMDDHHMM[SS]Z or YYMMDDHHMM[SS](+-)hhmm */
+ int min_length = sizeof("YYMMDDHHMMZ") - 1;
+ int max_length = sizeof("YYMMDDHHMMSS+hhmm") - 1;
+ if (remaining < min_length || remaining > max_length)
+ return 0;
+ OPENSSL_memcpy(p, str, 10);
+ p += 10;
+ str += 10;
+ remaining -= 10;
+ } else {
+ /*
+ * YYYYMMDDHHMM[SS[.fff]]Z or YYYYMMDDHHMM[SS[.f[f[f]]]](+-)hhmm
+ */
+ int min_length = sizeof("YYYYMMDDHHMMZ") - 1;
+ int max_length = sizeof("YYYYMMDDHHMMSS.fff+hhmm") - 1;
+ if (remaining < min_length || remaining > max_length)
+ return 0;
+ OPENSSL_memcpy(p, str, 12);
+ p += 12;
+ str += 12;
+ remaining -= 12;
+ }
+
+ if ((*str == 'Z') || (*str == '-') || (*str == '+')) {
+ *(p++) = '0';
+ *(p++) = '0';
+ } else {
+ /* SS (seconds) */
+ if (remaining < 2)
+ return 0;
+ *(p++) = *(str++);
+ *(p++) = *(str++);
+ remaining -= 2;
+ /*
+ * Skip any (up to three) fractional seconds... TODO(emilia): in
+ * RFC5280, fractional seconds are forbidden. Can we just kill them
+ * altogether?
+ */
+ if (remaining && *str == '.') {
+ str++;
+ remaining--;
+ for (i = 0; i < 3 && remaining; i++, str++, remaining--) {
+ if (*str < '0' || *str > '9')
+ break;
+ }
+ }
+
+ }
+ *(p++) = 'Z';
+ *(p++) = '\0';
+
+ /* We now need either a terminating 'Z' or an offset. */
+ if (!remaining)
+ return 0;
+ if (*str == 'Z') {
+ if (remaining != 1)
+ return 0;
+ offset = 0;
+ } else {
+ /* (+-)HHMM */
+ if ((*str != '+') && (*str != '-'))
+ return 0;
+ /*
+ * Historical behaviour: the (+-)hhmm offset is forbidden in RFC5280.
+ */
+ if (remaining != 5)
+ return 0;
+ if (str[1] < '0' || str[1] > '9' || str[2] < '0' || str[2] > '9' ||
+ str[3] < '0' || str[3] > '9' || str[4] < '0' || str[4] > '9')
+ return 0;
+ offset = ((str[1] - '0') * 10 + (str[2] - '0')) * 60;
+ offset += (str[3] - '0') * 10 + (str[4] - '0');
+ if (*str == '-')
+ offset = -offset;
+ }
+ atm.type = ctm->type;
+ atm.flags = 0;
+ atm.length = sizeof(buff2);
+ atm.data = (unsigned char *)buff2;
+
+ if (X509_time_adj(&atm, offset * 60, cmp_time) == NULL)
+ return 0;
+
+ if (ctm->type == V_ASN1_UTCTIME) {
+ i = (buff1[0] - '0') * 10 + (buff1[1] - '0');
+ if (i < 50)
+ i += 100; /* cf. RFC 2459 */
+ j = (buff2[0] - '0') * 10 + (buff2[1] - '0');
+ if (j < 50)
+ j += 100;
+
+ if (i < j)
+ return -1;
+ if (i > j)
+ return 1;
+ }
+ i = strcmp(buff1, buff2);
+ if (i == 0) /* wait a second then return younger :-) */
+ return -1;
+ else
+ return i;
+}
+
+ASN1_TIME *X509_gmtime_adj(ASN1_TIME *s, long adj)
+{
+ return X509_time_adj(s, adj, NULL);
+}
+
+ASN1_TIME *X509_time_adj(ASN1_TIME *s, long offset_sec, time_t *in_tm)
+{
+ return X509_time_adj_ex(s, 0, offset_sec, in_tm);
+}
+
+ASN1_TIME *X509_time_adj_ex(ASN1_TIME *s,
+ int offset_day, long offset_sec, time_t *in_tm)
+{
+ time_t t = 0;
+
+ if (in_tm)
+ t = *in_tm;
+ else
+ time(&t);
+
+ if (s && !(s->flags & ASN1_STRING_FLAG_MSTRING)) {
+ if (s->type == V_ASN1_UTCTIME)
+ return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
+ if (s->type == V_ASN1_GENERALIZEDTIME)
+ return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
+ }
+ return ASN1_TIME_adj(s, t, offset_day, offset_sec);
+}
+
+/* Make a delta CRL as the diff between two full CRLs */
+
+X509_CRL *X509_CRL_diff(X509_CRL *base, X509_CRL *newer,
+ EVP_PKEY *skey, const EVP_MD *md, unsigned int flags)
+{
+ X509_CRL *crl = NULL;
+ int i;
+ size_t j;
+ STACK_OF(X509_REVOKED) *revs = NULL;
+ /* CRLs can't be delta already */
+ if (base->base_crl_number || newer->base_crl_number) {
+ OPENSSL_PUT_ERROR(X509, X509_R_CRL_ALREADY_DELTA);
+ return NULL;
+ }
+ /* Base and new CRL must have a CRL number */
+ if (!base->crl_number || !newer->crl_number) {
+ OPENSSL_PUT_ERROR(X509, X509_R_NO_CRL_NUMBER);
+ return NULL;
+ }
+ /* Issuer names must match */
+ if (X509_NAME_cmp(X509_CRL_get_issuer(base), X509_CRL_get_issuer(newer))) {
+ OPENSSL_PUT_ERROR(X509, X509_R_ISSUER_MISMATCH);
+ return NULL;
+ }
+ /* AKID and IDP must match */
+ if (!crl_extension_match(base, newer, NID_authority_key_identifier)) {
+ OPENSSL_PUT_ERROR(X509, X509_R_AKID_MISMATCH);
+ return NULL;
+ }
+ if (!crl_extension_match(base, newer, NID_issuing_distribution_point)) {
+ OPENSSL_PUT_ERROR(X509, X509_R_IDP_MISMATCH);
+ return NULL;
+ }
+ /* Newer CRL number must exceed full CRL number */
+ if (ASN1_INTEGER_cmp(newer->crl_number, base->crl_number) <= 0) {
+ OPENSSL_PUT_ERROR(X509, X509_R_NEWER_CRL_NOT_NEWER);
+ return NULL;
+ }
+ /* CRLs must verify */
+ if (skey && (X509_CRL_verify(base, skey) <= 0 ||
+ X509_CRL_verify(newer, skey) <= 0)) {
+ OPENSSL_PUT_ERROR(X509, X509_R_CRL_VERIFY_FAILURE);
+ return NULL;
+ }
+ /* Create new CRL */
+ crl = X509_CRL_new();
+ if (!crl || !X509_CRL_set_version(crl, 1))
+ goto memerr;
+ /* Set issuer name */
+ if (!X509_CRL_set_issuer_name(crl, X509_CRL_get_issuer(newer)))
+ goto memerr;
+
+ if (!X509_CRL_set_lastUpdate(crl, X509_CRL_get_lastUpdate(newer)))
+ goto memerr;
+ if (!X509_CRL_set_nextUpdate(crl, X509_CRL_get_nextUpdate(newer)))
+ goto memerr;
+
+ /* Set base CRL number: must be critical */
+
+ if (!X509_CRL_add1_ext_i2d(crl, NID_delta_crl, base->crl_number, 1, 0))
+ goto memerr;
+
+ /*
+ * Copy extensions across from newest CRL to delta: this will set CRL
+ * number to correct value too.
+ */
+
+ for (i = 0; i < X509_CRL_get_ext_count(newer); i++) {
+ X509_EXTENSION *ext;
+ ext = X509_CRL_get_ext(newer, i);
+ if (!X509_CRL_add_ext(crl, ext, -1))
+ goto memerr;
+ }
+
+ /* Go through revoked entries, copying as needed */
+
+ revs = X509_CRL_get_REVOKED(newer);
+
+ for (j = 0; j < sk_X509_REVOKED_num(revs); j++) {
+ X509_REVOKED *rvn, *rvtmp;
+ rvn = sk_X509_REVOKED_value(revs, j);
+ /*
+ * Add only if not also in base. TODO: need something cleverer here
+ * for some more complex CRLs covering multiple CAs.
+ */
+ if (!X509_CRL_get0_by_serial(base, &rvtmp, rvn->serialNumber)) {
+ rvtmp = X509_REVOKED_dup(rvn);
+ if (!rvtmp)
+ goto memerr;
+ if (!X509_CRL_add0_revoked(crl, rvtmp)) {
+ X509_REVOKED_free(rvtmp);
+ goto memerr;
+ }
+ }
+ }
+ /* TODO: optionally prune deleted entries */
+
+ if (skey && md && !X509_CRL_sign(crl, skey, md))
+ goto memerr;
+
+ return crl;
+
+ memerr:
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ if (crl)
+ X509_CRL_free(crl);
+ return NULL;
+}
+
+int X509_STORE_CTX_get_ex_new_index(long argl, void *argp,
+ CRYPTO_EX_unused * unused,
+ CRYPTO_EX_dup *dup_unused,
+ CRYPTO_EX_free *free_func)
+{
+ /*
+ * This function is (usually) called only once, by
+ * SSL_get_ex_data_X509_STORE_CTX_idx (ssl/ssl_cert.c).
+ */
+ int index;
+ if (!CRYPTO_get_ex_new_index(&g_ex_data_class, &index, argl, argp,
+ free_func)) {
+ return -1;
+ }
+ return index;
+}
+
+int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
+{
+ return CRYPTO_set_ex_data(&ctx->ex_data, idx, data);
+}
+
+void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
+{
+ return CRYPTO_get_ex_data(&ctx->ex_data, idx);
+}
+
+int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
+{
+ return ctx->error;
+}
+
+void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
+{
+ ctx->error = err;
+}
+
+int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
+{
+ return ctx->error_depth;
+}
+
+X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
+{
+ return ctx->current_cert;
+}
+
+STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
+{
+ return ctx->chain;
+}
+
+STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx)
+{
+ if (!ctx->chain)
+ return NULL;
+ return X509_chain_up_ref(ctx->chain);
+}
+
+X509 *X509_STORE_CTX_get0_current_issuer(X509_STORE_CTX *ctx)
+{
+ return ctx->current_issuer;
+}
+
+X509_CRL *X509_STORE_CTX_get0_current_crl(X509_STORE_CTX *ctx)
+{
+ return ctx->current_crl;
+}
+
+X509_STORE_CTX *X509_STORE_CTX_get0_parent_ctx(X509_STORE_CTX *ctx)
+{
+ return ctx->parent;
+}
+
+void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
+{
+ ctx->cert = x;
+}
+
+void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
+{
+ ctx->untrusted = sk;
+}
+
+STACK_OF(X509) *X509_STORE_CTX_get0_untrusted(X509_STORE_CTX *ctx)
+{
+ return ctx->untrusted;
+}
+
+void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk)
+{
+ ctx->crls = sk;
+}
+
+int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose)
+{
+ return X509_STORE_CTX_purpose_inherit(ctx, 0, purpose, 0);
+}
+
+int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust)
+{
+ return X509_STORE_CTX_purpose_inherit(ctx, 0, 0, trust);
+}
+
+/*
+ * This function is used to set the X509_STORE_CTX purpose and trust values.
+ * This is intended to be used when another structure has its own trust and
+ * purpose values which (if set) will be inherited by the ctx. If they aren't
+ * set then we will usually have a default purpose in mind which should then
+ * be used to set the trust value. An example of this is SSL use: an SSL
+ * structure will have its own purpose and trust settings which the
+ * application can set: if they aren't set then we use the default of SSL
+ * client/server.
+ */
+
+int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
+ int purpose, int trust)
+{
+ int idx;
+ /* If purpose not set use default */
+ if (!purpose)
+ purpose = def_purpose;
+ /* If we have a purpose then check it is valid */
+ if (purpose) {
+ X509_PURPOSE *ptmp;
+ idx = X509_PURPOSE_get_by_id(purpose);
+ if (idx == -1) {
+ OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_PURPOSE_ID);
+ return 0;
+ }
+ ptmp = X509_PURPOSE_get0(idx);
+ if (ptmp->trust == X509_TRUST_DEFAULT) {
+ idx = X509_PURPOSE_get_by_id(def_purpose);
+ if (idx == -1) {
+ OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_PURPOSE_ID);
+ return 0;
+ }
+ ptmp = X509_PURPOSE_get0(idx);
+ }
+ /* If trust not set then get from purpose default */
+ if (!trust)
+ trust = ptmp->trust;
+ }
+ if (trust) {
+ idx = X509_TRUST_get_by_id(trust);
+ if (idx == -1) {
+ OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_TRUST_ID);
+ return 0;
+ }
+ }
+
+ if (purpose && !ctx->param->purpose)
+ ctx->param->purpose = purpose;
+ if (trust && !ctx->param->trust)
+ ctx->param->trust = trust;
+ return 1;
+}
+
+X509_STORE_CTX *X509_STORE_CTX_new(void)
+{
+ X509_STORE_CTX *ctx;
+ ctx = (X509_STORE_CTX *)OPENSSL_malloc(sizeof(X509_STORE_CTX));
+ if (!ctx) {
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ X509_STORE_CTX_zero(ctx);
+ return ctx;
+}
+
+void X509_STORE_CTX_zero(X509_STORE_CTX *ctx)
+{
+ OPENSSL_memset(ctx, 0, sizeof(X509_STORE_CTX));
+}
+
+void X509_STORE_CTX_free(X509_STORE_CTX *ctx)
+{
+ if (ctx == NULL) {
+ return;
+ }
+ X509_STORE_CTX_cleanup(ctx);
+ OPENSSL_free(ctx);
+}
+
+int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
+ STACK_OF(X509) *chain)
+{
+ int ret = 1;
+
+ X509_STORE_CTX_zero(ctx);
+ ctx->ctx = store;
+ ctx->cert = x509;
+ ctx->untrusted = chain;
+
+ CRYPTO_new_ex_data(&ctx->ex_data);
+
+ ctx->param = X509_VERIFY_PARAM_new();
+ if (!ctx->param)
+ goto err;
+
+ /*
+ * Inherit callbacks and flags from X509_STORE if not set use defaults.
+ */
+
+ if (store)
+ ret = X509_VERIFY_PARAM_inherit(ctx->param, store->param);
+ else
+ ctx->param->inh_flags |= X509_VP_FLAG_DEFAULT | X509_VP_FLAG_ONCE;
+
+ if (store) {
+ ctx->verify_cb = store->verify_cb;
+ ctx->cleanup = store->cleanup;
+ } else
+ ctx->cleanup = 0;
+
+ if (ret)
+ ret = X509_VERIFY_PARAM_inherit(ctx->param,
+ X509_VERIFY_PARAM_lookup("default"));
+
+ if (ret == 0)
+ goto err;
+
+ if (store && store->check_issued)
+ ctx->check_issued = store->check_issued;
+ else
+ ctx->check_issued = check_issued;
+
+ if (store && store->get_issuer)
+ ctx->get_issuer = store->get_issuer;
+ else
+ ctx->get_issuer = X509_STORE_CTX_get1_issuer;
+
+ if (store && store->verify_cb)
+ ctx->verify_cb = store->verify_cb;
+ else
+ ctx->verify_cb = null_callback;
+
+ if (store && store->verify)
+ ctx->verify = store->verify;
+ else
+ ctx->verify = internal_verify;
+
+ if (store && store->check_revocation)
+ ctx->check_revocation = store->check_revocation;
+ else
+ ctx->check_revocation = check_revocation;
+
+ if (store && store->get_crl)
+ ctx->get_crl = store->get_crl;
+ else
+ ctx->get_crl = NULL;
+
+ if (store && store->check_crl)
+ ctx->check_crl = store->check_crl;
+ else
+ ctx->check_crl = check_crl;
+
+ if (store && store->cert_crl)
+ ctx->cert_crl = store->cert_crl;
+ else
+ ctx->cert_crl = cert_crl;
+
+ if (store && store->lookup_certs)
+ ctx->lookup_certs = store->lookup_certs;
+ else
+ ctx->lookup_certs = X509_STORE_get1_certs;
+
+ if (store && store->lookup_crls)
+ ctx->lookup_crls = store->lookup_crls;
+ else
+ ctx->lookup_crls = X509_STORE_get1_crls;
+
+ ctx->check_policy = check_policy;
+
+ return 1;
+
+ err:
+ CRYPTO_free_ex_data(&g_ex_data_class, ctx, &ctx->ex_data);
+ if (ctx->param != NULL) {
+ X509_VERIFY_PARAM_free(ctx->param);
+ }
+
+ OPENSSL_memset(ctx, 0, sizeof(X509_STORE_CTX));
+ OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
+ return 0;
+}
+
+/*
+ * Set alternative lookup method: just a STACK of trusted certificates. This
+ * avoids X509_STORE nastiness where it isn't needed.
+ */
+
+void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
+{
+ ctx->other_ctx = sk;
+ ctx->get_issuer = get_issuer_sk;
+}
+
+void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx)
+{
+ /* We need to be idempotent because, unfortunately, |X509_STORE_CTX_free|
+ * also calls this function. */
+ if (ctx->cleanup != NULL) {
+ ctx->cleanup(ctx);
+ ctx->cleanup = NULL;
+ }
+ if (ctx->param != NULL) {
+ if (ctx->parent == NULL)
+ X509_VERIFY_PARAM_free(ctx->param);
+ ctx->param = NULL;
+ }
+ if (ctx->tree != NULL) {
+ X509_policy_tree_free(ctx->tree);
+ ctx->tree = NULL;
+ }
+ if (ctx->chain != NULL) {
+ sk_X509_pop_free(ctx->chain, X509_free);
+ ctx->chain = NULL;
+ }
+ CRYPTO_free_ex_data(&g_ex_data_class, ctx, &(ctx->ex_data));
+ OPENSSL_memset(&ctx->ex_data, 0, sizeof(CRYPTO_EX_DATA));
+}
+
+void X509_STORE_CTX_set_depth(X509_STORE_CTX *ctx, int depth)
+{
+ X509_VERIFY_PARAM_set_depth(ctx->param, depth);
+}
+
+void X509_STORE_CTX_set_flags(X509_STORE_CTX *ctx, unsigned long flags)
+{
+ X509_VERIFY_PARAM_set_flags(ctx->param, flags);
+}
+
+void X509_STORE_CTX_set_time(X509_STORE_CTX *ctx, unsigned long flags,
+ time_t t)
+{
+ X509_VERIFY_PARAM_set_time(ctx->param, t);
+}
+
+void X509_STORE_CTX_set_verify_cb(X509_STORE_CTX *ctx,
+ int (*verify_cb) (int, X509_STORE_CTX *))
+{
+ ctx->verify_cb = verify_cb;
+}
+
+X509_POLICY_TREE *X509_STORE_CTX_get0_policy_tree(X509_STORE_CTX *ctx)
+{
+ return ctx->tree;
+}
+
+int X509_STORE_CTX_get_explicit_policy(X509_STORE_CTX *ctx)
+{
+ return ctx->explicit_policy;
+}
+
+int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name)
+{
+ const X509_VERIFY_PARAM *param;
+ param = X509_VERIFY_PARAM_lookup(name);
+ if (!param)
+ return 0;
+ return X509_VERIFY_PARAM_inherit(ctx->param, param);
+}
+
+X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx)
+{
+ return ctx->param;
+}
+
+void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param)
+{
+ if (ctx->param)
+ X509_VERIFY_PARAM_free(ctx->param);
+ ctx->param = param;
+}
+
+IMPLEMENT_ASN1_SET_OF(X509)
+
+IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE)
git://repos.xcallymotion.com / motion2.git / blobdiff