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path: root/app/openssl/crypto/x509/x509_vfy.c
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Diffstat (limited to 'app/openssl/crypto/x509/x509_vfy.c')
-rw-r--r--app/openssl/crypto/x509/x509_vfy.c2224
1 files changed, 0 insertions, 2224 deletions
diff --git a/app/openssl/crypto/x509/x509_vfy.c b/app/openssl/crypto/x509/x509_vfy.c
deleted file mode 100644
index 920066ae..00000000
--- a/app/openssl/crypto/x509/x509_vfy.c
+++ /dev/null
@@ -1,2224 +0,0 @@
-/* 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>
-
-/* 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_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
-
-int X509_verify_cert(X509_STORE_CTX *ctx)
- {
- X509 *x,*xtmp,*chain_ss=NULL;
- int bad_chain = 0;
- X509_VERIFY_PARAM *param = ctx->param;
- int depth,i,ok=0;
- int num;
- int (*cb)(int xok,X509_STORE_CTX *xctx);
- STACK_OF(X509) *sktmp=NULL;
- if (ctx->cert == NULL)
- {
- X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
- 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 == NULL)
- {
- 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);
- goto end;
- }
- 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);
- 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 (ctx->check_issued(ctx, x,x)) 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);
- goto end;
- }
- 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;
- }
-
- /* 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. */
-
- /* 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 (ctx->check_issued(ctx, x, 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--;
- 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 (ctx->check_issued(ctx,x,x)) break;
-
- ok = ctx->get_issuer(&xtmp, ctx, x);
-
- if (ok < 0) return ok;
- 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);
- return 0;
- }
- num++;
- }
-
- /* we now have our chain, lets check it... */
-
- /* Is last certificate looked up self signed? */
- if (!ctx->check_issued(ctx,x,x))
- {
- 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;
-
- /* Check name constraints */
-
- ok = check_name_constraints(ctx);
-
- if (!ok) goto end;
-
- /* The chain extensions are OK: check trust */
-
- if (param->trust > 0) ok = check_trust(ctx);
-
- if (!ok) goto end;
-
- /* 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 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;
-
-#ifndef OPENSSL_NO_RFC3779
- /* RFC 3779 path validation, now that CRL check has been done */
- ok = v3_asid_validate_path(ctx);
- if (!ok) goto end;
- ok = v3_addr_validate_path(ctx);
- if (!ok) goto end;
-#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 end;
- if (0)
- {
-end:
- 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);
- return 0;
-}
-
-/* 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_trust(X509_STORE_CTX *ctx)
-{
-#ifdef OPENSSL_NO_CHAIN_VERIFY
- return 1;
-#else
- int i, ok;
- X509 *x;
- int (*cb)(int xok,X509_STORE_CTX *xctx);
- cb=ctx->verify_cb;
-/* For now just check the last certificate in the chain */
- i = sk_X509_num(ctx->chain) - 1;
- x = sk_X509_value(ctx->chain, i);
- ok = X509_check_trust(x, ctx->param->trust, 0);
- if (ok == X509_TRUST_TRUSTED)
- return 1;
- ctx->error_depth = i;
- ctx->current_cert = x;
- if (ok == X509_TRUST_REJECTED)
- ctx->error = X509_V_ERR_CERT_REJECTED;
- else
- ctx->error = X509_V_ERR_CERT_UNTRUSTED;
- ok = cb(0, ctx);
- return ok;
-#endif
-}
-
-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
- {
- /* 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 (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;
-
- 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;
-
- p=buff1;
- i=ctm->length;
- str=(char *)ctm->data;
- if (ctm->type == V_ASN1_UTCTIME)
- {
- if ((i < 11) || (i > 17)) return 0;
- memcpy(p,str,10);
- p+=10;
- str+=10;
- }
- else
- {
- if (i < 13) return 0;
- memcpy(p,str,12);
- p+=12;
- str+=12;
- }
-
- if ((*str == 'Z') || (*str == '-') || (*str == '+'))
- { *(p++)='0'; *(p++)='0'; }
- else
- {
- *(p++)= *(str++);
- *(p++)= *(str++);
- /* Skip any fractional seconds... */
- if (*str == '.')
- {
- str++;
- while ((*str >= '0') && (*str <= '9')) str++;
- }
-
- }
- *(p++)='Z';
- *(p++)='\0';
-
- if (*str == 'Z')
- offset=0;
- else
- {
- if ((*str != '+') && (*str != '-'))
- 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;
- }
-
-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)
- {
- int i;
- X509 *x;
- STACK_OF(X509) *chain;
- if (!ctx->chain || !(chain = sk_X509_dup(ctx->chain))) return NULL;
- for (i = 0; i < sk_X509_num(chain); i++)
- {
- x = sk_X509_value(chain, i);
- CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
- }
- return 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)
-{
- 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;
-
- 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;
- 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);
- return 0;
- }
-
- 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;
-
-
- /* This memset() can't make any sense anyway, so it's removed. As
- * X509_STORE_CTX_cleanup does a proper "free" on the ex_data, we put a
- * corresponding "new" here and remove this bogus initialisation. */
- /* memset(&(ctx->ex_data),0,sizeof(CRYPTO_EX_DATA)); */
- if(!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE_CTX, ctx,
- &(ctx->ex_data)))
- {
- OPENSSL_free(ctx);
- X509err(X509_F_X509_STORE_CTX_INIT,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- return 1;
- }
-
-/* 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)
- {
- if (ctx->cleanup) ctx->cleanup(ctx);
- 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)