diff options
Diffstat (limited to 'thirdparty/openssl/crypto/x509/x509_vfy.c')
| -rw-r--r-- | thirdparty/openssl/crypto/x509/x509_vfy.c | 2497 |
1 files changed, 2497 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/x509/x509_vfy.c b/thirdparty/openssl/crypto/x509/x509_vfy.c new file mode 100644 index 0000000000..4d34dbac93 --- /dev/null +++ b/thirdparty/openssl/crypto/x509/x509_vfy.c @@ -0,0 +1,2497 @@ +/* crypto/x509/x509_vfy.c */ +/* 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 <stdio.h> +#include <time.h> +#include <errno.h> + +#include "cryptlib.h" +#include <openssl/crypto.h> +#include <openssl/lhash.h> +#include <openssl/buffer.h> +#include <openssl/evp.h> +#include <openssl/asn1.h> +#include <openssl/x509.h> +#include <openssl/x509v3.h> +#include <openssl/objects.h> +#include "vpm_int.h" + +/* 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); +const char X509_version[] = "X.509" OPENSSL_VERSION_PTEXT; + +static int null_callback(int ok, X509_STORE_CTX *e) +{ + return ok; +} + +#if 0 +static int x509_subject_cmp(X509 **a, X509 **b) +{ + return X509_subject_name_cmp(*a, *b); +} +#endif +/* 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; + int 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)) + CRYPTO_add(&xtmp->references, 1, CRYPTO_LOCK_X509); + 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; + int (*cb) (int xok, X509_STORE_CTX *xctx); + STACK_OF(X509) *sktmp = NULL; + int trust = X509_TRUST_UNTRUSTED; + int err; + + if (ctx->cert == NULL) { + X509err(X509_F_X509_VERIFY_CERT, X509_R_NO_CERT_SET_FOR_US_TO_VERIFY); + return -1; + } + if (ctx->chain != NULL) { + /* + * This X509_STORE_CTX has already been used to verify a cert. We + * cannot do another one. + */ + X509err(X509_F_X509_VERIFY_CERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + 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 + */ + if (((ctx->chain = sk_X509_new_null()) == NULL) || + (!sk_X509_push(ctx->chain, ctx->cert))) { + X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE); + ok = -1; + goto err; + } + CRYPTO_add(&ctx->cert->references, 1, CRYPTO_LOCK_X509); + ctx->last_untrusted = 1; + + /* We use a temporary STACK so we can chop and hack at it */ + if (ctx->untrusted != NULL + && (sktmp = sk_X509_dup(ctx->untrusted)) == NULL) { + X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE); + ok = -1; + goto err; + } + + 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) + goto err; + /* + * 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 (ctx->untrusted != NULL) { + xtmp = find_issuer(ctx, sktmp, x); + if (xtmp != NULL) { + if (!sk_X509_push(ctx->chain, xtmp)) { + X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE); + ok = -1; + goto err; + } + CRYPTO_add(&xtmp->references, 1, CRYPTO_LOCK_X509); + (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 err; + } 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) + goto err; + if (ok == 0) + break; + x = xtmp; + if (!sk_X509_push(ctx->chain, x)) { + X509_free(xtmp); + X509err(X509_F_X509_VERIFY_CERT, ERR_R_MALLOC_FAILURE); + ok = -1; + goto err; + } + num++; + } + + /* we now have our chain, lets check it... */ + if ((trust = check_trust(ctx)) == X509_TRUST_REJECTED) { + /* Callback already issued */ + ok = 0; + goto err; + } + + /* + * 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 err; + /* 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 err; + } + + /* We have the chain complete: now we need to check its purpose */ + ok = check_chain_extensions(ctx); + + if (!ok) + goto err; + + /* Check name constraints */ + + ok = check_name_constraints(ctx); + + if (!ok) + goto err; + + ok = check_id(ctx); + + if (!ok) + goto err; + + /* We may as well copy down any DSA parameters that are required */ + X509_get_pubkey_parameters(NULL, ctx->chain); + + /* + * 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 err; + + 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 err; + } + + /* 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 err; + +#ifndef OPENSSL_NO_RFC3779 + /* RFC 3779 path validation, now that CRL check has been done */ + ok = v3_asid_validate_path(ctx); + if (!ok) + goto err; + ok = v3_addr_validate_path(ctx); + if (!ok) + goto err; +#endif + + /* If we get this far evaluate policies */ + if (!bad_chain && (ctx->param->flags & X509_V_FLAG_POLICY_CHECK)) + ok = ctx->check_policy(ctx); + if (!ok) + goto err; + if (0) { + err: + /* Ensure we return an error */ + if (ok > 0) + ok = 0; + X509_get_pubkey_parameters(NULL, ctx->chain); + } + if (sktmp != NULL) + sk_X509_free(sktmp); + if (chain_ss != NULL) + X509_free(chain_ss); + 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) +{ + int 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) { + CRYPTO_add(&(*issuer)->references, 1, CRYPTO_LOCK_X509); + 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) +{ +#ifdef OPENSSL_NO_CHAIN_VERIFY + return 1; +#else + 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); + /* + * A hack to keep people who don't want to modify their software + * happy + */ + if (getenv("OPENSSL_ALLOW_PROXY_CERTS")) + allow_proxy_certs = 1; + 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; +#endif +} + +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); + if (rv != X509_V_OK) { + ctx->error = rv; + ctx->error_depth = i; + ctx->current_cert = x; + if (!ctx->verify_cb(0, ctx)) + return 0; + } + } + } + } + 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) +{ + int i; + int 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, 0, 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->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) +{ + int i, 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 < 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, 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 i, crl_score, best_score = *pscore; + 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) { + 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; + CRYPTO_add(&best_crl->references, 1, CRYPTO_LOCK_X509_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; + int 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; + CRYPTO_add(&delta->references, 1, CRYPTO_LOCK_X509_CRL); + *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; + int i; + + if (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 < 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; + } + } +} + +/* + * 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; + int 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) +{ + int 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) +{ + int 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) { + X509err(X509_F_CHECK_POLICY, ERR_R_MALLOC_FAILURE); + return 0; + } + /* Invalid or inconsistent extensions */ + if (ret == -1) { + /* + * Locate certificates with bad extensions and notify callback. + */ + X509 *x; + int 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; + ctx->error = 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->valid + && (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; + } + + xs->valid = 1; + + 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; + 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; + 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; + + 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); +} + +int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain) +{ + EVP_PKEY *ktmp = NULL, *ktmp2; + int i, j; + + if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) + return 1; + + for (i = 0; i < sk_X509_num(chain); i++) { + ktmp = X509_get_pubkey(sk_X509_value(chain, i)); + if (ktmp == NULL) { + X509err(X509_F_X509_GET_PUBKEY_PARAMETERS, + X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY); + return 0; + } + if (!EVP_PKEY_missing_parameters(ktmp)) + break; + else { + EVP_PKEY_free(ktmp); + ktmp = NULL; + } + } + if (ktmp == NULL) { + X509err(X509_F_X509_GET_PUBKEY_PARAMETERS, + X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN); + return 0; + } + + /* first, populate the other certs */ + for (j = i - 1; j >= 0; j--) { + ktmp2 = X509_get_pubkey(sk_X509_value(chain, j)); + EVP_PKEY_copy_parameters(ktmp2, ktmp); + EVP_PKEY_free(ktmp2); + } + + if (pkey != NULL) + EVP_PKEY_copy_parameters(pkey, ktmp); + EVP_PKEY_free(ktmp); + return 1; +} + +/* 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; + STACK_OF(X509_REVOKED) *revs = NULL; + /* CRLs can't be delta already */ + if (base->base_crl_number || newer->base_crl_number) { + X509err(X509_F_X509_CRL_DIFF, X509_R_CRL_ALREADY_DELTA); + return NULL; + } + /* Base and new CRL must have a CRL number */ + if (!base->crl_number || !newer->crl_number) { + X509err(X509_F_X509_CRL_DIFF, 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))) { + X509err(X509_F_X509_CRL_DIFF, X509_R_ISSUER_MISMATCH); + return NULL; + } + /* AKID and IDP must match */ + if (!crl_extension_match(base, newer, NID_authority_key_identifier)) { + X509err(X509_F_X509_CRL_DIFF, X509_R_AKID_MISMATCH); + return NULL; + } + if (!crl_extension_match(base, newer, NID_issuing_distribution_point)) { + X509err(X509_F_X509_CRL_DIFF, 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) { + X509err(X509_F_X509_CRL_DIFF, 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)) { + X509err(X509_F_X509_CRL_DIFF, 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 (i = 0; i < sk_X509_REVOKED_num(revs); i++) { + X509_REVOKED *rvn, *rvtmp; + rvn = sk_X509_REVOKED_value(revs, i); + /* + * 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: + X509err(X509_F_X509_CRL_DIFF, 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_new *new_func, + CRYPTO_EX_dup *dup_func, + 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). + */ + return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509_STORE_CTX, argl, argp, + new_func, dup_func, free_func); +} + +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; +} + +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) { + X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT, + 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) { + X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT, + 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) { + X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT, + 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) { + X509err(X509_F_X509_STORE_CTX_NEW, ERR_R_MALLOC_FAILURE); + return NULL; + } + memset(ctx, 0, sizeof(X509_STORE_CTX)); + return ctx; +} + +void X509_STORE_CTX_free(X509_STORE_CTX *ctx) +{ + if (!ctx) + 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; + ctx->ctx = store; + ctx->current_method = 0; + ctx->cert = x509; + ctx->untrusted = chain; + ctx->crls = NULL; + ctx->last_untrusted = 0; + ctx->other_ctx = NULL; + ctx->valid = 0; + ctx->chain = NULL; + ctx->error = 0; + ctx->explicit_policy = 0; + ctx->error_depth = 0; + ctx->current_cert = NULL; + ctx->current_issuer = NULL; + ctx->current_crl = NULL; + ctx->current_crl_score = 0; + ctx->current_reasons = 0; + ctx->tree = NULL; + ctx->parent = NULL; + /* Zero ex_data to make sure we're cleanup-safe */ + memset(&ctx->ex_data, 0, sizeof(ctx->ex_data)); + + ctx->param = X509_VERIFY_PARAM_new(); + if (!ctx->param) { + X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE); + return 0; + } + + /* + * 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; + /* Seems to always be 0 in OpenSSL, else must be idempotent */ + 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) { + X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE); + 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; + + if (CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx, + &ctx->ex_data)) + return 1; + X509err(X509_F_X509_STORE_CTX_INIT, ERR_R_MALLOC_FAILURE); + + err: + /* + * On error clean up allocated storage, if the store context was not + * allocated with X509_STORE_CTX_new() this is our last chance to do so. + */ + X509_STORE_CTX_cleanup(ctx); + 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, free() also calls + * cleanup(), so the natural call sequence new(), init(), cleanup(), free() + * calls cleanup() for the same object twice! Thus we must zero the + * pointers below after they're freed! + */ + /* Seems to always be 0 in OpenSSL, do this at most once. */ + 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(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx, &(ctx->ex_data)); + 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_STACK_OF(X509) + +IMPLEMENT_ASN1_SET_OF(X509) + +IMPLEMENT_STACK_OF(X509_NAME) + +IMPLEMENT_STACK_OF(X509_ATTRIBUTE) + +IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE) |