| /* 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 <openssl/asn1.h> |
| #include <openssl/asn1t.h> |
| #include <openssl/digest.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| #include <openssl/stack.h> |
| #include <openssl/thread.h> |
| #include <openssl/x509.h> |
| #include <openssl/x509v3.h> |
| |
| #include "../internal.h" |
| #include "internal.h" |
| |
| /* |
| * Method to handle CRL access. In general a CRL could be very large (several |
| * Mb) and can consume large amounts of resources if stored in memory by |
| * multiple processes. This method allows general CRL operations to be |
| * redirected to more efficient callbacks: for example a CRL entry database. |
| */ |
| |
| #define X509_CRL_METHOD_DYNAMIC 1 |
| |
| struct x509_crl_method_st { |
| int flags; |
| int (*crl_init) (X509_CRL *crl); |
| int (*crl_free) (X509_CRL *crl); |
| int (*crl_lookup) (X509_CRL *crl, X509_REVOKED **ret, |
| ASN1_INTEGER *ser, X509_NAME *issuer); |
| int (*crl_verify) (X509_CRL *crl, EVP_PKEY *pk); |
| }; |
| |
| static int X509_REVOKED_cmp(const X509_REVOKED **a, const X509_REVOKED **b); |
| static int setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp); |
| |
| ASN1_SEQUENCE(X509_REVOKED) = { |
| ASN1_SIMPLE(X509_REVOKED,serialNumber, ASN1_INTEGER), |
| ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME), |
| ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION) |
| } ASN1_SEQUENCE_END(X509_REVOKED) |
| |
| static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r); |
| static int def_crl_lookup(X509_CRL *crl, |
| X509_REVOKED **ret, ASN1_INTEGER *serial, |
| X509_NAME *issuer); |
| |
| static const X509_CRL_METHOD int_crl_meth = { |
| 0, |
| 0, 0, |
| def_crl_lookup, |
| def_crl_verify |
| }; |
| |
| static const X509_CRL_METHOD *default_crl_method = &int_crl_meth; |
| |
| /* |
| * The X509_CRL_INFO structure needs a bit of customisation. Since we cache |
| * the original encoding the signature wont be affected by reordering of the |
| * revoked field. |
| */ |
| static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
| void *exarg) |
| { |
| X509_CRL_INFO *a = (X509_CRL_INFO *)*pval; |
| |
| if (!a || !a->revoked) |
| return 1; |
| switch (operation) { |
| /* |
| * Just set cmp function here. We don't sort because that would |
| * affect the output of X509_CRL_print(). |
| */ |
| case ASN1_OP_D2I_POST: |
| /* TODO(davidben): Check that default |versions| are never encoded and |
| * that |extensions| is only present in v2. */ |
| |
| (void)sk_X509_REVOKED_set_cmp_func(a->revoked, X509_REVOKED_cmp); |
| break; |
| } |
| return 1; |
| } |
| |
| |
| ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = { |
| ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER), |
| ASN1_SIMPLE(X509_CRL_INFO, sig_alg, X509_ALGOR), |
| ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME), |
| ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME), |
| ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME), |
| ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED), |
| ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0) |
| } ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO) |
| |
| /* |
| * Set CRL entry issuer according to CRL certificate issuer extension. Check |
| * for unhandled critical CRL entry extensions. |
| */ |
| |
| static int crl_set_issuers(X509_CRL *crl) |
| { |
| |
| size_t i, k; |
| int j; |
| GENERAL_NAMES *gens, *gtmp; |
| STACK_OF(X509_REVOKED) *revoked; |
| |
| revoked = X509_CRL_get_REVOKED(crl); |
| |
| gens = NULL; |
| for (i = 0; i < sk_X509_REVOKED_num(revoked); i++) { |
| X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i); |
| STACK_OF(X509_EXTENSION) *exts; |
| ASN1_ENUMERATED *reason; |
| X509_EXTENSION *ext; |
| gtmp = X509_REVOKED_get_ext_d2i(rev, |
| NID_certificate_issuer, &j, NULL); |
| if (!gtmp && (j != -1)) { |
| crl->flags |= EXFLAG_INVALID; |
| return 1; |
| } |
| |
| if (gtmp) { |
| gens = gtmp; |
| if (!crl->issuers) { |
| crl->issuers = sk_GENERAL_NAMES_new_null(); |
| if (!crl->issuers) |
| return 0; |
| } |
| if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp)) |
| return 0; |
| } |
| rev->issuer = gens; |
| |
| reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason, &j, NULL); |
| if (!reason && (j != -1)) { |
| crl->flags |= EXFLAG_INVALID; |
| return 1; |
| } |
| |
| if (reason) { |
| rev->reason = ASN1_ENUMERATED_get(reason); |
| ASN1_ENUMERATED_free(reason); |
| } else |
| rev->reason = CRL_REASON_NONE; |
| |
| /* Check for critical CRL entry extensions */ |
| |
| exts = rev->extensions; |
| |
| for (k = 0; k < sk_X509_EXTENSION_num(exts); k++) { |
| ext = sk_X509_EXTENSION_value(exts, k); |
| if (X509_EXTENSION_get_critical(ext)) { |
| if (OBJ_obj2nid(X509_EXTENSION_get_object(ext)) == |
| NID_certificate_issuer) |
| continue; |
| crl->flags |= EXFLAG_CRITICAL; |
| break; |
| } |
| } |
| |
| } |
| |
| return 1; |
| |
| } |
| |
| /* |
| * The X509_CRL structure needs a bit of customisation. Cache some extensions |
| * and hash of the whole CRL. |
| */ |
| static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
| void *exarg) |
| { |
| X509_CRL *crl = (X509_CRL *)*pval; |
| STACK_OF(X509_EXTENSION) *exts; |
| X509_EXTENSION *ext; |
| size_t idx; |
| int i; |
| |
| switch (operation) { |
| case ASN1_OP_NEW_POST: |
| crl->idp = NULL; |
| crl->akid = NULL; |
| crl->flags = 0; |
| crl->idp_flags = 0; |
| crl->idp_reasons = CRLDP_ALL_REASONS; |
| crl->meth = default_crl_method; |
| crl->meth_data = NULL; |
| crl->issuers = NULL; |
| crl->crl_number = NULL; |
| crl->base_crl_number = NULL; |
| break; |
| |
| case ASN1_OP_D2I_POST: |
| if (!X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL)) { |
| return 0; |
| } |
| |
| crl->idp = X509_CRL_get_ext_d2i(crl, |
| NID_issuing_distribution_point, &i, |
| NULL); |
| if (crl->idp != NULL) { |
| if (!setup_idp(crl, crl->idp)) { |
| return 0; |
| } |
| } else if (i != -1) { |
| return 0; |
| } |
| |
| crl->akid = X509_CRL_get_ext_d2i(crl, |
| NID_authority_key_identifier, &i, |
| NULL); |
| if (crl->akid == NULL && i != -1) { |
| return 0; |
| } |
| |
| crl->crl_number = X509_CRL_get_ext_d2i(crl, |
| NID_crl_number, &i, NULL); |
| if (crl->crl_number == NULL && i != -1) { |
| return 0; |
| } |
| |
| crl->base_crl_number = X509_CRL_get_ext_d2i(crl, NID_delta_crl, &i, |
| NULL); |
| if (crl->base_crl_number == NULL && i != -1) { |
| return 0; |
| } |
| /* Delta CRLs must have CRL number */ |
| if (crl->base_crl_number && !crl->crl_number) { |
| OPENSSL_PUT_ERROR(X509, X509_R_DELTA_CRL_WITHOUT_CRL_NUMBER); |
| return 0; |
| } |
| |
| /* |
| * See if we have any unhandled critical CRL extensions and indicate |
| * this in a flag. We only currently handle IDP so anything else |
| * critical sets the flag. This code accesses the X509_CRL structure |
| * directly: applications shouldn't do this. |
| */ |
| |
| exts = crl->crl->extensions; |
| |
| for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++) { |
| int nid; |
| ext = sk_X509_EXTENSION_value(exts, idx); |
| nid = OBJ_obj2nid(X509_EXTENSION_get_object(ext)); |
| if (nid == NID_freshest_crl) |
| crl->flags |= EXFLAG_FRESHEST; |
| if (X509_EXTENSION_get_critical(ext)) { |
| /* We handle IDP and deltas */ |
| if ((nid == NID_issuing_distribution_point) |
| || (nid == NID_authority_key_identifier) |
| || (nid == NID_delta_crl)) |
| continue; |
| crl->flags |= EXFLAG_CRITICAL; |
| break; |
| } |
| } |
| |
| if (!crl_set_issuers(crl)) |
| return 0; |
| |
| if (crl->meth->crl_init) { |
| if (crl->meth->crl_init(crl) == 0) |
| return 0; |
| } |
| break; |
| |
| case ASN1_OP_FREE_POST: |
| /* |crl->meth| may be NULL if constructing the object failed before |
| * |ASN1_OP_NEW_POST| was run. */ |
| if (crl->meth && crl->meth->crl_free) { |
| if (!crl->meth->crl_free(crl)) |
| return 0; |
| } |
| if (crl->akid) |
| AUTHORITY_KEYID_free(crl->akid); |
| if (crl->idp) |
| ISSUING_DIST_POINT_free(crl->idp); |
| ASN1_INTEGER_free(crl->crl_number); |
| ASN1_INTEGER_free(crl->base_crl_number); |
| sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free); |
| break; |
| } |
| return 1; |
| } |
| |
| /* Convert IDP into a more convenient form */ |
| |
| static int setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp) |
| { |
| int idp_only = 0; |
| /* Set various flags according to IDP */ |
| crl->idp_flags |= IDP_PRESENT; |
| if (idp->onlyuser > 0) { |
| idp_only++; |
| crl->idp_flags |= IDP_ONLYUSER; |
| } |
| if (idp->onlyCA > 0) { |
| idp_only++; |
| crl->idp_flags |= IDP_ONLYCA; |
| } |
| if (idp->onlyattr > 0) { |
| idp_only++; |
| crl->idp_flags |= IDP_ONLYATTR; |
| } |
| |
| if (idp_only > 1) |
| crl->idp_flags |= IDP_INVALID; |
| |
| if (idp->indirectCRL > 0) |
| crl->idp_flags |= IDP_INDIRECT; |
| |
| if (idp->onlysomereasons) { |
| crl->idp_flags |= IDP_REASONS; |
| if (idp->onlysomereasons->length > 0) |
| crl->idp_reasons = idp->onlysomereasons->data[0]; |
| if (idp->onlysomereasons->length > 1) |
| crl->idp_reasons |= (idp->onlysomereasons->data[1] << 8); |
| crl->idp_reasons &= CRLDP_ALL_REASONS; |
| } |
| |
| return DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl)); |
| } |
| |
| ASN1_SEQUENCE_ref(X509_CRL, crl_cb) = { |
| ASN1_SIMPLE(X509_CRL, crl, X509_CRL_INFO), |
| ASN1_SIMPLE(X509_CRL, sig_alg, X509_ALGOR), |
| ASN1_SIMPLE(X509_CRL, signature, ASN1_BIT_STRING) |
| } ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL) |
| |
| IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED) |
| |
| IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED) |
| |
| IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO) |
| IMPLEMENT_ASN1_FUNCTIONS(X509_CRL) |
| IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL) |
| |
| static int X509_REVOKED_cmp(const X509_REVOKED **a, const X509_REVOKED **b) |
| { |
| return ASN1_STRING_cmp((*a)->serialNumber, (*b)->serialNumber); |
| } |
| |
| int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev) |
| { |
| X509_CRL_INFO *inf; |
| inf = crl->crl; |
| if (!inf->revoked) |
| inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp); |
| if (!inf->revoked || !sk_X509_REVOKED_push(inf->revoked, rev)) { |
| OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| inf->enc.modified = 1; |
| return 1; |
| } |
| |
| int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *pkey) |
| { |
| if (crl->meth->crl_verify) |
| return crl->meth->crl_verify(crl, pkey); |
| return 0; |
| } |
| |
| int X509_CRL_get0_by_serial(X509_CRL *crl, |
| X509_REVOKED **ret, ASN1_INTEGER *serial) |
| { |
| if (crl->meth->crl_lookup) |
| return crl->meth->crl_lookup(crl, ret, serial, NULL); |
| return 0; |
| } |
| |
| int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x) |
| { |
| if (crl->meth->crl_lookup) |
| return crl->meth->crl_lookup(crl, ret, |
| X509_get_serialNumber(x), |
| X509_get_issuer_name(x)); |
| return 0; |
| } |
| |
| static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r) |
| { |
| if (X509_ALGOR_cmp(crl->sig_alg, crl->crl->sig_alg) != 0) { |
| OPENSSL_PUT_ERROR(X509, X509_R_SIGNATURE_ALGORITHM_MISMATCH); |
| return 0; |
| } |
| |
| return (ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO), |
| crl->sig_alg, crl->signature, crl->crl, r)); |
| } |
| |
| static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm, |
| X509_REVOKED *rev) |
| { |
| size_t i; |
| |
| if (!rev->issuer) { |
| if (!nm) |
| return 1; |
| if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl))) |
| return 1; |
| return 0; |
| } |
| |
| if (!nm) |
| nm = X509_CRL_get_issuer(crl); |
| |
| for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++) { |
| GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i); |
| if (gen->type != GEN_DIRNAME) |
| continue; |
| if (!X509_NAME_cmp(nm, gen->d.directoryName)) |
| return 1; |
| } |
| return 0; |
| |
| } |
| |
| static struct CRYPTO_STATIC_MUTEX g_crl_sort_lock = CRYPTO_STATIC_MUTEX_INIT; |
| |
| static int def_crl_lookup(X509_CRL *crl, |
| X509_REVOKED **ret, ASN1_INTEGER *serial, |
| X509_NAME *issuer) |
| { |
| X509_REVOKED rtmp, *rev; |
| size_t idx; |
| rtmp.serialNumber = serial; |
| /* |
| * Sort revoked into serial number order if not already sorted. Do this |
| * under a lock to avoid race condition. |
| */ |
| |
| CRYPTO_STATIC_MUTEX_lock_read(&g_crl_sort_lock); |
| const int is_sorted = sk_X509_REVOKED_is_sorted(crl->crl->revoked); |
| CRYPTO_STATIC_MUTEX_unlock_read(&g_crl_sort_lock); |
| |
| if (!is_sorted) { |
| CRYPTO_STATIC_MUTEX_lock_write(&g_crl_sort_lock); |
| if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked)) { |
| sk_X509_REVOKED_sort(crl->crl->revoked); |
| } |
| CRYPTO_STATIC_MUTEX_unlock_write(&g_crl_sort_lock); |
| } |
| |
| if (!sk_X509_REVOKED_find(crl->crl->revoked, &idx, &rtmp)) |
| return 0; |
| /* Need to look for matching name */ |
| for (; idx < sk_X509_REVOKED_num(crl->crl->revoked); idx++) { |
| rev = sk_X509_REVOKED_value(crl->crl->revoked, idx); |
| if (ASN1_INTEGER_cmp(rev->serialNumber, serial)) |
| return 0; |
| if (crl_revoked_issuer_match(crl, issuer, rev)) { |
| if (ret) |
| *ret = rev; |
| if (rev->reason == CRL_REASON_REMOVE_FROM_CRL) |
| return 2; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| void X509_CRL_set_default_method(const X509_CRL_METHOD *meth) |
| { |
| if (meth == NULL) |
| default_crl_method = &int_crl_meth; |
| else |
| default_crl_method = meth; |
| } |
| |
| X509_CRL_METHOD *X509_CRL_METHOD_new(int (*crl_init) (X509_CRL *crl), |
| int (*crl_free) (X509_CRL *crl), |
| int (*crl_lookup) (X509_CRL *crl, |
| X509_REVOKED **ret, |
| ASN1_INTEGER *ser, |
| X509_NAME *issuer), |
| int (*crl_verify) (X509_CRL *crl, |
| EVP_PKEY *pk)) |
| { |
| X509_CRL_METHOD *m; |
| m = OPENSSL_malloc(sizeof(X509_CRL_METHOD)); |
| if (!m) |
| return NULL; |
| m->crl_init = crl_init; |
| m->crl_free = crl_free; |
| m->crl_lookup = crl_lookup; |
| m->crl_verify = crl_verify; |
| m->flags = X509_CRL_METHOD_DYNAMIC; |
| return m; |
| } |
| |
| void X509_CRL_METHOD_free(X509_CRL_METHOD *m) |
| { |
| if (!(m->flags & X509_CRL_METHOD_DYNAMIC)) |
| return; |
| OPENSSL_free(m); |
| } |
| |
| void X509_CRL_set_meth_data(X509_CRL *crl, void *dat) |
| { |
| crl->meth_data = dat; |
| } |
| |
| void *X509_CRL_get_meth_data(X509_CRL *crl) |
| { |
| return crl->meth_data; |
| } |
