diff options
Diffstat (limited to 'openssl/crypto/asn1/x_crl.c')
| -rw-r--r-- | openssl/crypto/asn1/x_crl.c | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/x_crl.c b/openssl/crypto/asn1/x_crl.c new file mode 100644 index 00000000..c51c690b --- /dev/null +++ b/openssl/crypto/asn1/x_crl.c @@ -0,0 +1,527 @@ +/* crypto/asn1/x_crl.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 "cryptlib.h" +#include "asn1_locl.h" +#include <openssl/asn1t.h> +#include <openssl/x509.h> +#include <openssl/x509v3.h> + +static int X509_REVOKED_cmp(const X509_REVOKED * const *a, + const X509_REVOKED * const *b); +static void 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 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: + (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) + { + + int i, 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 (j = 0; j < sk_X509_EXTENSION_num(exts); j++) + { + ext = sk_X509_EXTENSION_value(exts, j); + if (ext->critical > 0) + { + if (OBJ_obj2nid(ext->object) == + 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; + int idx; + + 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: +#ifndef OPENSSL_NO_SHA + X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL); +#endif + crl->idp = X509_CRL_get_ext_d2i(crl, + NID_issuing_distribution_point, NULL, NULL); + if (crl->idp) + setup_idp(crl, crl->idp); + + crl->akid = X509_CRL_get_ext_d2i(crl, + NID_authority_key_identifier, NULL, NULL); + + crl->crl_number = X509_CRL_get_ext_d2i(crl, + NID_crl_number, NULL, NULL); + + crl->base_crl_number = X509_CRL_get_ext_d2i(crl, + NID_delta_crl, NULL, NULL); + /* Delta CRLs must have CRL number */ + if (crl->base_crl_number && !crl->crl_number) + crl->flags |= EXFLAG_INVALID; + + /* 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(ext->object); + if (nid == NID_freshest_crl) + crl->flags |= EXFLAG_FRESHEST; + if (ext->critical > 0) + { + /* We handle IDP and deltas */ + if ((nid == NID_issuing_distribution_point) + || (nid == NID_delta_crl)) + break;; + 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: + if (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 void 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; + } + + DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl)); + } + +ASN1_SEQUENCE_ref(X509_CRL, crl_cb, CRYPTO_LOCK_X509_CRL) = { + 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_FUNCTIONS(X509_CRL_INFO) +IMPLEMENT_ASN1_FUNCTIONS(X509_CRL) +IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL) + +static int X509_REVOKED_cmp(const X509_REVOKED * const *a, + const X509_REVOKED * const *b) + { + return(ASN1_STRING_cmp( + (ASN1_STRING *)(*a)->serialNumber, + (ASN1_STRING *)(*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)) { + ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE); + return 0; + } + inf->enc.modified = 1; + return 1; +} + +int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r) + { + if (crl->meth->crl_verify) + return crl->meth->crl_verify(crl, r); + 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) + { + 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) + { + int 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 int def_crl_lookup(X509_CRL *crl, + X509_REVOKED **ret, ASN1_INTEGER *serial, X509_NAME *issuer) + { + X509_REVOKED rtmp, *rev; + int idx; + rtmp.serialNumber = serial; + /* Sort revoked into serial number order if not already sorted. + * Do this under a lock to avoid race condition. + */ + if (!sk_X509_REVOKED_is_sorted(crl->crl->revoked)) + { + CRYPTO_w_lock(CRYPTO_LOCK_X509_CRL); + sk_X509_REVOKED_sort(crl->crl->revoked); + CRYPTO_w_unlock(CRYPTO_LOCK_X509_CRL); + } + idx = sk_X509_REVOKED_find(crl->crl->revoked, &rtmp); + if(idx < 0) + 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; + } + +IMPLEMENT_STACK_OF(X509_REVOKED) +IMPLEMENT_ASN1_SET_OF(X509_REVOKED) +IMPLEMENT_STACK_OF(X509_CRL) +IMPLEMENT_ASN1_SET_OF(X509_CRL) |