/* $OpenBSD: x509_lu.c,v 1.55 2022/01/14 07:53:45 tb Exp $ */ /* 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 #include #include #include #include #include #include "x509_lcl.h" X509_LOOKUP * X509_LOOKUP_new(X509_LOOKUP_METHOD *method) { X509_LOOKUP *lu; if ((lu = calloc(1, sizeof(*lu))) == NULL) { X509error(ERR_R_MALLOC_FAILURE); return NULL; } lu->method = method; if (method->new_item != NULL && !method->new_item(lu)) { free(lu); return NULL; } return lu; } void X509_LOOKUP_free(X509_LOOKUP *ctx) { if (ctx == NULL) return; if (ctx->method != NULL && ctx->method->free != NULL) ctx->method->free(ctx); free(ctx); } int X509_LOOKUP_init(X509_LOOKUP *ctx) { if (ctx->method == NULL) return 0; if (ctx->method->init == NULL) return 1; return ctx->method->init(ctx); } int X509_LOOKUP_shutdown(X509_LOOKUP *ctx) { if (ctx->method == NULL) return 0; if (ctx->method->shutdown == NULL) return 1; return ctx->method->shutdown(ctx); } int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl, char **ret) { if (ctx->method == NULL) return -1; if (ctx->method->ctrl == NULL) return 1; return ctx->method->ctrl(ctx, cmd, argc, argl, ret); } int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type, X509_NAME *name, X509_OBJECT *ret) { if (ctx->method == NULL || ctx->method->get_by_subject == NULL) return 0; return ctx->method->get_by_subject(ctx, type, name, ret); } int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type, X509_NAME *name, ASN1_INTEGER *serial, X509_OBJECT *ret) { if (ctx->method == NULL || ctx->method->get_by_issuer_serial == NULL) return 0; return ctx->method->get_by_issuer_serial(ctx, type, name, serial, ret); } int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type, const unsigned char *bytes, int len, X509_OBJECT *ret) { if (ctx->method == NULL || ctx->method->get_by_fingerprint == NULL) return 0; return ctx->method->get_by_fingerprint(ctx, type, bytes, len, ret); } int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type, const char *str, int len, X509_OBJECT *ret) { if (ctx->method == NULL || ctx->method->get_by_alias == NULL) return 0; return ctx->method->get_by_alias(ctx, type, str, len, ret); } static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b) { int ret; if ((ret = (*a)->type - (*b)->type) != 0) return ret; switch ((*a)->type) { case X509_LU_X509: return X509_subject_name_cmp((*a)->data.x509, (*b)->data.x509); case X509_LU_CRL: return X509_CRL_cmp((*a)->data.crl, (*b)->data.crl); } return 0; } X509_STORE * X509_STORE_new(void) { X509_STORE *store; if ((store = calloc(1, sizeof(*store))) == NULL) goto err; if ((store->objs = sk_X509_OBJECT_new(x509_object_cmp)) == NULL) goto err; if ((store->get_cert_methods = sk_X509_LOOKUP_new_null()) == NULL) goto err; if ((store->param = X509_VERIFY_PARAM_new()) == NULL) goto err; if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, store, &store->ex_data)) goto err; store->references = 1; return store; err: X509error(ERR_R_MALLOC_FAILURE); X509_STORE_free(store); return NULL; } X509_OBJECT * X509_OBJECT_new(void) { X509_OBJECT *obj; if ((obj = calloc(1, sizeof(*obj))) == NULL) { X509error(ERR_R_MALLOC_FAILURE); return NULL; } obj->type = X509_LU_NONE; return obj; } void X509_OBJECT_free(X509_OBJECT *a) { if (a == NULL) return; switch (a->type) { case X509_LU_X509: X509_free(a->data.x509); break; case X509_LU_CRL: X509_CRL_free(a->data.crl); break; } free(a); } void X509_STORE_free(X509_STORE *store) { STACK_OF(X509_LOOKUP) *sk; X509_LOOKUP *lu; int i; if (store == NULL) return; if (CRYPTO_add(&store->references, -1, CRYPTO_LOCK_X509_STORE) > 0) return; sk = store->get_cert_methods; for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) { lu = sk_X509_LOOKUP_value(sk, i); X509_LOOKUP_shutdown(lu); X509_LOOKUP_free(lu); } sk_X509_LOOKUP_free(sk); sk_X509_OBJECT_pop_free(store->objs, X509_OBJECT_free); CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, store, &store->ex_data); X509_VERIFY_PARAM_free(store->param); free(store); } int X509_STORE_up_ref(X509_STORE *store) { return CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE) > 1; } X509_LOOKUP * X509_STORE_add_lookup(X509_STORE *store, X509_LOOKUP_METHOD *method) { STACK_OF(X509_LOOKUP) *sk; X509_LOOKUP *lu; int i; sk = store->get_cert_methods; for (i = 0; i < sk_X509_LOOKUP_num(sk); i++) { lu = sk_X509_LOOKUP_value(sk, i); if (method == lu->method) { return lu; } } if ((lu = X509_LOOKUP_new(method)) == NULL) return NULL; lu->store_ctx = store; if (sk_X509_LOOKUP_push(store->get_cert_methods, lu) <= 0) { X509error(ERR_R_MALLOC_FAILURE); X509_LOOKUP_free(lu); return NULL; } return lu; } X509_OBJECT * X509_STORE_CTX_get_obj_by_subject(X509_STORE_CTX *vs, X509_LOOKUP_TYPE type, X509_NAME *name) { X509_OBJECT *obj; if ((obj = X509_OBJECT_new()) == NULL) return NULL; if (!X509_STORE_CTX_get_by_subject(vs, type, name, obj)) { X509_OBJECT_free(obj); return NULL; } return obj; } int X509_STORE_CTX_get_by_subject(X509_STORE_CTX *vs, X509_LOOKUP_TYPE type, X509_NAME *name, X509_OBJECT *ret) { X509_STORE *ctx = vs->store; X509_LOOKUP *lu; X509_OBJECT stmp, *tmp; int i; if (ctx == NULL) return 0; memset(&stmp, 0, sizeof(stmp)); CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); tmp = X509_OBJECT_retrieve_by_subject(ctx->objs, type, name); CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); if (tmp == NULL || type == X509_LU_CRL) { for (i = 0; i < sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) { lu = sk_X509_LOOKUP_value(ctx->get_cert_methods, i); if (X509_LOOKUP_by_subject(lu, type, name, &stmp) != 0) { tmp = &stmp; break; } } if (tmp == NULL) return 0; } if (!X509_OBJECT_up_ref_count(tmp)) return 0; *ret = *tmp; return 1; } /* Add obj to the store. Takes ownership of obj. */ static int X509_STORE_add_object(X509_STORE *store, X509_OBJECT *obj) { int ret = 0; CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); if (X509_OBJECT_retrieve_match(store->objs, obj) != NULL) { /* Object is already present in the store. That's fine. */ ret = 1; goto out; } if (sk_X509_OBJECT_push(store->objs, obj) <= 0) { X509error(ERR_R_MALLOC_FAILURE); goto out; } obj = NULL; ret = 1; out: CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); X509_OBJECT_free(obj); return ret; } int X509_STORE_add_cert(X509_STORE *store, X509 *x) { X509_OBJECT *obj; if (x == NULL) return 0; if ((obj = X509_OBJECT_new()) == NULL) return 0; if (!X509_up_ref(x)) { X509_OBJECT_free(obj); return 0; } obj->type = X509_LU_X509; obj->data.x509 = x; return X509_STORE_add_object(store, obj); } int X509_STORE_add_crl(X509_STORE *store, X509_CRL *x) { X509_OBJECT *obj; if (x == NULL) return 0; if ((obj = X509_OBJECT_new()) == NULL) return 0; if (!X509_CRL_up_ref(x)) { X509_OBJECT_free(obj); return 0; } obj->type = X509_LU_CRL; obj->data.crl = x; return X509_STORE_add_object(store, obj); } int X509_OBJECT_up_ref_count(X509_OBJECT *a) { switch (a->type) { case X509_LU_X509: return X509_up_ref(a->data.x509); case X509_LU_CRL: return X509_CRL_up_ref(a->data.crl); } return 1; } X509_LOOKUP_TYPE X509_OBJECT_get_type(const X509_OBJECT *a) { return a->type; } static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type, X509_NAME *name, int *pnmatch) { X509_OBJECT stmp; X509 x509_s; X509_CINF cinf_s; X509_CRL crl_s; X509_CRL_INFO crl_info_s; int idx; stmp.type = type; switch (type) { case X509_LU_X509: stmp.data.x509 = &x509_s; x509_s.cert_info = &cinf_s; cinf_s.subject = name; break; case X509_LU_CRL: stmp.data.crl = &crl_s; crl_s.crl = &crl_info_s; crl_info_s.issuer = name; break; default: return -1; } idx = sk_X509_OBJECT_find(h, &stmp); if (idx >= 0 && pnmatch) { int tidx; const X509_OBJECT *tobj, *pstmp; *pnmatch = 1; pstmp = &stmp; for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++) { tobj = sk_X509_OBJECT_value(h, tidx); if (x509_object_cmp(&tobj, &pstmp)) break; (*pnmatch)++; } } return idx; } int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type, X509_NAME *name) { return x509_object_idx_cnt(h, type, name, NULL); } X509_OBJECT * X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, X509_LOOKUP_TYPE type, X509_NAME *name) { int idx; idx = X509_OBJECT_idx_by_subject(h, type, name); if (idx == -1) return NULL; return sk_X509_OBJECT_value(h, idx); } X509 * X509_OBJECT_get0_X509(const X509_OBJECT *xo) { if (xo != NULL && xo->type == X509_LU_X509) return xo->data.x509; return NULL; } X509_CRL * X509_OBJECT_get0_X509_CRL(X509_OBJECT *xo) { if (xo != NULL && xo->type == X509_LU_CRL) return xo->data.crl; return NULL; } static STACK_OF(X509) * X509_get1_certs_from_cache(X509_STORE *store, X509_NAME *name) { STACK_OF(X509) *sk = NULL; X509 *x = NULL; X509_OBJECT *obj; int i, idx, cnt; CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); idx = x509_object_idx_cnt(store->objs, X509_LU_X509, name, &cnt); if (idx < 0) goto err; if ((sk = sk_X509_new_null()) == NULL) goto err; for (i = 0; i < cnt; i++, idx++) { obj = sk_X509_OBJECT_value(store->objs, idx); x = obj->data.x509; if (!X509_up_ref(x)) { x = NULL; goto err; } if (!sk_X509_push(sk, x)) goto err; } CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); return sk; err: CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); sk_X509_pop_free(sk, X509_free); X509_free(x); return NULL; } STACK_OF(X509) * X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *name) { X509_STORE *store = ctx->store; STACK_OF(X509) *sk; X509_OBJECT *obj; if (store == NULL) return NULL; if ((sk = X509_get1_certs_from_cache(store, name)) != NULL) return sk; /* Nothing found: do lookup to possibly add new objects to cache. */ obj = X509_STORE_CTX_get_obj_by_subject(ctx, X509_LU_X509, name); if (obj == NULL) return NULL; X509_OBJECT_free(obj); return X509_get1_certs_from_cache(store, name); } STACK_OF(X509_CRL) * X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *name) { X509_STORE *store = ctx->store; STACK_OF(X509_CRL) *sk = NULL; X509_CRL *x = NULL; X509_OBJECT *obj = NULL; int i, idx, cnt; if (store == NULL) return NULL; /* Always do lookup to possibly add new CRLs to cache */ obj = X509_STORE_CTX_get_obj_by_subject(ctx, X509_LU_CRL, name); if (obj == NULL) return NULL; X509_OBJECT_free(obj); obj = NULL; CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); idx = x509_object_idx_cnt(store->objs, X509_LU_CRL, name, &cnt); if (idx < 0) goto err; if ((sk = sk_X509_CRL_new_null()) == NULL) goto err; for (i = 0; i < cnt; i++, idx++) { obj = sk_X509_OBJECT_value(store->objs, idx); x = obj->data.crl; if (!X509_CRL_up_ref(x)) { x = NULL; goto err; } if (!sk_X509_CRL_push(sk, x)) goto err; } CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); return sk; err: CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); X509_CRL_free(x); sk_X509_CRL_pop_free(sk, X509_CRL_free); return NULL; } X509_OBJECT * X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x) { int idx, i; X509_OBJECT *obj; idx = sk_X509_OBJECT_find(h, x); if (idx == -1) return NULL; if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL)) return sk_X509_OBJECT_value(h, idx); for (i = idx; i < sk_X509_OBJECT_num(h); i++) { obj = sk_X509_OBJECT_value(h, i); if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x)) return NULL; if (x->type == X509_LU_X509) { if (!X509_cmp(obj->data.x509, x->data.x509)) return obj; } else if (x->type == X509_LU_CRL) { if (!X509_CRL_match(obj->data.crl, x->data.crl)) return obj; } else return obj; } return NULL; } /* Try to get issuer certificate from store. Due to limitations * of the API this can only retrieve a single certificate matching * a given subject name. However it will fill the cache with all * matching certificates, so we can examine the cache for all * matches. * * Return values are: * 1 lookup successful. * 0 certificate not found. * -1 some other error. */ int X509_STORE_CTX_get1_issuer(X509 **out_issuer, X509_STORE_CTX *ctx, X509 *x) { X509_NAME *xn; X509_OBJECT *obj, *pobj; X509 *issuer = NULL; int i, idx, ret; *out_issuer = NULL; xn = X509_get_issuer_name(x); obj = X509_STORE_CTX_get_obj_by_subject(ctx, X509_LU_X509, xn); if (obj == NULL) return 0; if ((issuer = X509_OBJECT_get0_X509(obj)) == NULL) { X509_OBJECT_free(obj); return 0; } if (!X509_up_ref(issuer)) { X509_OBJECT_free(obj); return -1; } /* If certificate matches all OK */ if (ctx->check_issued(ctx, x, issuer)) { if (x509_check_cert_time(ctx, issuer, -1)) { *out_issuer = issuer; X509_OBJECT_free(obj); return 1; } } X509_free(issuer); issuer = NULL; X509_OBJECT_free(obj); obj = NULL; if (ctx->store == NULL) return 0; /* Else find index of first cert accepted by 'check_issued' */ CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); idx = X509_OBJECT_idx_by_subject(ctx->store->objs, X509_LU_X509, xn); if (idx != -1) /* should be true as we've had at least one match */ { /* Look through all matching certs for suitable issuer */ for (i = idx; i < sk_X509_OBJECT_num(ctx->store->objs); i++) { pobj = sk_X509_OBJECT_value(ctx->store->objs, i); /* See if we've run past the matches */ if (pobj->type != X509_LU_X509) break; if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) break; if (ctx->check_issued(ctx, x, pobj->data.x509)) { issuer = pobj->data.x509; /* * If times check, exit with match, * otherwise keep looking. Leave last * match in issuer so we return nearest * match if no certificate time is OK. */ if (x509_check_cert_time(ctx, issuer, -1)) break; } } } ret = 0; if (issuer != NULL) { if (!X509_up_ref(issuer)) { ret = -1; } else { *out_issuer = issuer; ret = 1; } } CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); return ret; } STACK_OF(X509_OBJECT) * X509_STORE_get0_objects(X509_STORE *xs) { return xs->objs; } void * X509_STORE_get_ex_data(X509_STORE *xs, int idx) { return CRYPTO_get_ex_data(&xs->ex_data, idx); } int X509_STORE_set_ex_data(X509_STORE *xs, int idx, void *data) { return CRYPTO_set_ex_data(&xs->ex_data, idx, data); } int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags) { return X509_VERIFY_PARAM_set_flags(ctx->param, flags); } int X509_STORE_set_depth(X509_STORE *ctx, int depth) { X509_VERIFY_PARAM_set_depth(ctx->param, depth); return 1; } int X509_STORE_set_purpose(X509_STORE *ctx, int purpose) { return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose); } int X509_STORE_set_trust(X509_STORE *ctx, int trust) { return X509_VERIFY_PARAM_set_trust(ctx->param, trust); } int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param) { return X509_VERIFY_PARAM_set1(ctx->param, param); } X509_VERIFY_PARAM * X509_STORE_get0_param(X509_STORE *ctx) { return ctx->param; } void X509_STORE_set_verify(X509_STORE *store, X509_STORE_CTX_verify_fn verify) { store->verify = verify; } X509_STORE_CTX_verify_fn X509_STORE_get_verify(X509_STORE *store) { return store->verify; } void X509_STORE_set_verify_cb(X509_STORE *store, X509_STORE_CTX_verify_cb verify_cb) { store->verify_cb = verify_cb; } X509_STORE_CTX_verify_cb X509_STORE_get_verify_cb(X509_STORE *store) { return store->verify_cb; }