diff options
Diffstat (limited to 'crypto/openssl/ssl/ssl_cert.c')
| -rw-r--r-- | crypto/openssl/ssl/ssl_cert.c | 1362 |
1 files changed, 1362 insertions, 0 deletions
diff --git a/crypto/openssl/ssl/ssl_cert.c b/crypto/openssl/ssl/ssl_cert.c new file mode 100644 index 000000000000..1be6cd7dbc99 --- /dev/null +++ b/crypto/openssl/ssl/ssl_cert.c @@ -0,0 +1,1362 @@ +/* + * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include "internal/e_os.h" + +#include <stdio.h> +#include <sys/types.h> + +#include "internal/nelem.h" +#include "internal/o_dir.h" +#include <openssl/bio.h> +#include <openssl/pem.h> +#include <openssl/store.h> +#include <openssl/x509v3.h> +#include <openssl/dh.h> +#include <openssl/bn.h> +#include <openssl/crypto.h> +#include "internal/refcount.h" +#include "ssl_local.h" +#include "ssl_cert_table.h" +#include "internal/thread_once.h" +#include "internal/ssl_unwrap.h" +#ifndef OPENSSL_NO_POSIX_IO +# include <sys/stat.h> +# ifdef _WIN32 +# define stat _stat +# endif +# ifndef S_ISDIR +# define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR) +# endif +#endif + + +static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, + int op, int bits, int nid, void *other, + void *ex); + +static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT; +static volatile int ssl_x509_store_ctx_idx = -1; + +DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init) +{ + ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0, + "SSL for verify callback", + NULL, NULL, NULL); + return ssl_x509_store_ctx_idx >= 0; +} + +int SSL_get_ex_data_X509_STORE_CTX_idx(void) +{ + + if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init)) + return -1; + return ssl_x509_store_ctx_idx; +} + +CERT *ssl_cert_new(size_t ssl_pkey_num) +{ + CERT *ret = NULL; + + /* Should never happen */ + if (!ossl_assert(ssl_pkey_num >= SSL_PKEY_NUM)) + return NULL; + + ret = OPENSSL_zalloc(sizeof(*ret)); + if (ret == NULL) + return NULL; + + ret->ssl_pkey_num = ssl_pkey_num; + ret->pkeys = OPENSSL_zalloc(ret->ssl_pkey_num * sizeof(CERT_PKEY)); + if (ret->pkeys == NULL) { + OPENSSL_free(ret); + return NULL; + } + + ret->key = &(ret->pkeys[SSL_PKEY_RSA]); + ret->sec_cb = ssl_security_default_callback; + ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL; + ret->sec_ex = NULL; + if (!CRYPTO_NEW_REF(&ret->references, 1)) { + OPENSSL_free(ret->pkeys); + OPENSSL_free(ret); + return NULL; + } + + return ret; +} + +CERT *ssl_cert_dup(CERT *cert) +{ + CERT *ret = OPENSSL_zalloc(sizeof(*ret)); + size_t i; +#ifndef OPENSSL_NO_COMP_ALG + int j; +#endif + + if (ret == NULL) + return NULL; + + ret->ssl_pkey_num = cert->ssl_pkey_num; + ret->pkeys = OPENSSL_zalloc(ret->ssl_pkey_num * sizeof(CERT_PKEY)); + if (ret->pkeys == NULL) { + OPENSSL_free(ret); + return NULL; + } + + ret->key = &ret->pkeys[cert->key - cert->pkeys]; + if (!CRYPTO_NEW_REF(&ret->references, 1)) { + OPENSSL_free(ret->pkeys); + OPENSSL_free(ret); + return NULL; + } + + if (cert->dh_tmp != NULL) { + if (!EVP_PKEY_up_ref(cert->dh_tmp)) + goto err; + ret->dh_tmp = cert->dh_tmp; + } + + ret->dh_tmp_cb = cert->dh_tmp_cb; + ret->dh_tmp_auto = cert->dh_tmp_auto; + + for (i = 0; i < ret->ssl_pkey_num; i++) { + CERT_PKEY *cpk = cert->pkeys + i; + CERT_PKEY *rpk = ret->pkeys + i; + + if (cpk->x509 != NULL) { + if (!X509_up_ref(cpk->x509)) + goto err; + rpk->x509 = cpk->x509; + } + + if (cpk->privatekey != NULL) { + if (!EVP_PKEY_up_ref(cpk->privatekey)) + goto err; + rpk->privatekey = cpk->privatekey; + } + + if (cpk->chain) { + rpk->chain = X509_chain_up_ref(cpk->chain); + if (!rpk->chain) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + goto err; + } + } + if (cpk->serverinfo != NULL) { + /* Just copy everything. */ + rpk->serverinfo = OPENSSL_memdup(cpk->serverinfo, cpk->serverinfo_length); + if (rpk->serverinfo == NULL) + goto err; + rpk->serverinfo_length = cpk->serverinfo_length; + } +#ifndef OPENSSL_NO_COMP_ALG + for (j = TLSEXT_comp_cert_none; j < TLSEXT_comp_cert_limit; j++) { + if (cpk->comp_cert[j] != NULL) { + if (!OSSL_COMP_CERT_up_ref(cpk->comp_cert[j])) + goto err; + rpk->comp_cert[j] = cpk->comp_cert[j]; + } + } +#endif + } + + /* Configured sigalgs copied across */ + if (cert->conf_sigalgs) { + ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen + * sizeof(*cert->conf_sigalgs)); + if (ret->conf_sigalgs == NULL) + goto err; + memcpy(ret->conf_sigalgs, cert->conf_sigalgs, + cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs)); + ret->conf_sigalgslen = cert->conf_sigalgslen; + } else + ret->conf_sigalgs = NULL; + + if (cert->client_sigalgs) { + ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen + * sizeof(*cert->client_sigalgs)); + if (ret->client_sigalgs == NULL) + goto err; + memcpy(ret->client_sigalgs, cert->client_sigalgs, + cert->client_sigalgslen * sizeof(*cert->client_sigalgs)); + ret->client_sigalgslen = cert->client_sigalgslen; + } else + ret->client_sigalgs = NULL; + /* Copy any custom client certificate types */ + if (cert->ctype) { + ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len); + if (ret->ctype == NULL) + goto err; + ret->ctype_len = cert->ctype_len; + } + + ret->cert_flags = cert->cert_flags; + + ret->cert_cb = cert->cert_cb; + ret->cert_cb_arg = cert->cert_cb_arg; + + if (cert->verify_store) { + if (!X509_STORE_up_ref(cert->verify_store)) + goto err; + ret->verify_store = cert->verify_store; + } + + if (cert->chain_store) { + if (!X509_STORE_up_ref(cert->chain_store)) + goto err; + ret->chain_store = cert->chain_store; + } + + ret->sec_cb = cert->sec_cb; + ret->sec_level = cert->sec_level; + ret->sec_ex = cert->sec_ex; + + if (!custom_exts_copy(&ret->custext, &cert->custext)) + goto err; +#ifndef OPENSSL_NO_PSK + if (cert->psk_identity_hint) { + ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint); + if (ret->psk_identity_hint == NULL) + goto err; + } +#endif + return ret; + + err: + ssl_cert_free(ret); + + return NULL; +} + +/* Free up and clear all certificates and chains */ + +void ssl_cert_clear_certs(CERT *c) +{ + size_t i; +#ifndef OPENSSL_NO_COMP_ALG + int j; +#endif + + if (c == NULL) + return; + for (i = 0; i < c->ssl_pkey_num; i++) { + CERT_PKEY *cpk = c->pkeys + i; + X509_free(cpk->x509); + cpk->x509 = NULL; + EVP_PKEY_free(cpk->privatekey); + cpk->privatekey = NULL; + OSSL_STACK_OF_X509_free(cpk->chain); + cpk->chain = NULL; + OPENSSL_free(cpk->serverinfo); + cpk->serverinfo = NULL; + cpk->serverinfo_length = 0; +#ifndef OPENSSL_NO_COMP_ALG + for (j = 0; j < TLSEXT_comp_cert_limit; j++) { + OSSL_COMP_CERT_free(cpk->comp_cert[j]); + cpk->comp_cert[j] = NULL; + cpk->cert_comp_used = 0; + } +#endif + } +} + +void ssl_cert_free(CERT *c) +{ + int i; + + if (c == NULL) + return; + CRYPTO_DOWN_REF(&c->references, &i); + REF_PRINT_COUNT("CERT", i, c); + if (i > 0) + return; + REF_ASSERT_ISNT(i < 0); + + EVP_PKEY_free(c->dh_tmp); + + ssl_cert_clear_certs(c); + OPENSSL_free(c->conf_sigalgs); + OPENSSL_free(c->client_sigalgs); + OPENSSL_free(c->ctype); + X509_STORE_free(c->verify_store); + X509_STORE_free(c->chain_store); + custom_exts_free(&c->custext); +#ifndef OPENSSL_NO_PSK + OPENSSL_free(c->psk_identity_hint); +#endif + OPENSSL_free(c->pkeys); + CRYPTO_FREE_REF(&c->references); + OPENSSL_free(c); +} + +int ssl_cert_set0_chain(SSL_CONNECTION *s, SSL_CTX *ctx, STACK_OF(X509) *chain) +{ + int i, r; + CERT_PKEY *cpk = s != NULL ? s->cert->key : ctx->cert->key; + + if (!cpk) + return 0; + for (i = 0; i < sk_X509_num(chain); i++) { + X509 *x = sk_X509_value(chain, i); + + r = ssl_security_cert(s, ctx, x, 0, 0); + if (r != 1) { + ERR_raise(ERR_LIB_SSL, r); + return 0; + } + } + OSSL_STACK_OF_X509_free(cpk->chain); + cpk->chain = chain; + return 1; +} + +int ssl_cert_set1_chain(SSL_CONNECTION *s, SSL_CTX *ctx, STACK_OF(X509) *chain) +{ + STACK_OF(X509) *dchain; + + if (!chain) + return ssl_cert_set0_chain(s, ctx, NULL); + dchain = X509_chain_up_ref(chain); + if (!dchain) + return 0; + if (!ssl_cert_set0_chain(s, ctx, dchain)) { + OSSL_STACK_OF_X509_free(dchain); + return 0; + } + return 1; +} + +int ssl_cert_add0_chain_cert(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x) +{ + int r; + CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key; + + if (!cpk) + return 0; + r = ssl_security_cert(s, ctx, x, 0, 0); + if (r != 1) { + ERR_raise(ERR_LIB_SSL, r); + return 0; + } + if (!cpk->chain) + cpk->chain = sk_X509_new_null(); + if (!cpk->chain || !sk_X509_push(cpk->chain, x)) + return 0; + return 1; +} + +int ssl_cert_add1_chain_cert(SSL_CONNECTION *s, SSL_CTX *ctx, X509 *x) +{ + if (!X509_up_ref(x)) + return 0; + if (!ssl_cert_add0_chain_cert(s, ctx, x)) { + X509_free(x); + return 0; + } + return 1; +} + +int ssl_cert_select_current(CERT *c, X509 *x) +{ + size_t i; + + if (x == NULL) + return 0; + for (i = 0; i < c->ssl_pkey_num; i++) { + CERT_PKEY *cpk = c->pkeys + i; + if (cpk->x509 == x && cpk->privatekey) { + c->key = cpk; + return 1; + } + } + + for (i = 0; i < c->ssl_pkey_num; i++) { + CERT_PKEY *cpk = c->pkeys + i; + if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) { + c->key = cpk; + return 1; + } + } + return 0; +} + +int ssl_cert_set_current(CERT *c, long op) +{ + size_t i, idx; + + if (!c) + return 0; + if (op == SSL_CERT_SET_FIRST) + idx = 0; + else if (op == SSL_CERT_SET_NEXT) { + idx = (size_t)(c->key - c->pkeys + 1); + if (idx >= c->ssl_pkey_num) + return 0; + } else + return 0; + for (i = idx; i < c->ssl_pkey_num; i++) { + CERT_PKEY *cpk = c->pkeys + i; + if (cpk->x509 && cpk->privatekey) { + c->key = cpk; + return 1; + } + } + return 0; +} + +void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg) +{ + c->cert_cb = cb; + c->cert_cb_arg = arg; +} + +/* + * Verify a certificate chain/raw public key + * Return codes: + * 1: Verify success + * 0: Verify failure or error + * -1: Retry required + */ +static int ssl_verify_internal(SSL_CONNECTION *s, STACK_OF(X509) *sk, EVP_PKEY *rpk) +{ + X509 *x; + int i = 0; + X509_STORE *verify_store; + X509_STORE_CTX *ctx = NULL; + X509_VERIFY_PARAM *param; + SSL_CTX *sctx; + + /* Something must be passed in */ + if ((sk == NULL || sk_X509_num(sk) == 0) && rpk == NULL) + return 0; + + /* Only one can be set */ + if (sk != NULL && rpk != NULL) + return 0; + + sctx = SSL_CONNECTION_GET_CTX(s); + if (s->cert->verify_store) + verify_store = s->cert->verify_store; + else + verify_store = sctx->cert_store; + + ctx = X509_STORE_CTX_new_ex(sctx->libctx, sctx->propq); + if (ctx == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + return 0; + } + + if (sk != NULL) { + x = sk_X509_value(sk, 0); + if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + goto end; + } + } else { + if (!X509_STORE_CTX_init_rpk(ctx, verify_store, rpk)) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + goto end; + } + } + param = X509_STORE_CTX_get0_param(ctx); + /* + * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some + * point, for now a single @SECLEVEL sets the same policy for TLS crypto + * and PKI authentication. + */ + X509_VERIFY_PARAM_set_auth_level(param, + SSL_get_security_level(SSL_CONNECTION_GET_SSL(s))); + + /* Set suite B flags if needed */ + X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s)); + if (!X509_STORE_CTX_set_ex_data(ctx, + SSL_get_ex_data_X509_STORE_CTX_idx(), + SSL_CONNECTION_GET_USER_SSL(s))) + goto end; + + /* Verify via DANE if enabled */ + if (DANETLS_ENABLED(&s->dane)) + X509_STORE_CTX_set0_dane(ctx, &s->dane); + + /* + * We need to inherit the verify parameters. These can be determined by + * the context: if its a server it will verify SSL client certificates or + * vice versa. + */ + + X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); + /* + * Anything non-default in "s->param" should overwrite anything in the ctx. + */ + X509_VERIFY_PARAM_set1(param, s->param); + + if (s->verify_callback) + X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback); + + if (sctx->app_verify_callback != NULL) { + i = sctx->app_verify_callback(ctx, sctx->app_verify_arg); + } else { + i = X509_verify_cert(ctx); + /* We treat an error in the same way as a failure to verify */ + if (i < 0) + i = 0; + } + + s->verify_result = X509_STORE_CTX_get_error(ctx); + OSSL_STACK_OF_X509_free(s->verified_chain); + s->verified_chain = NULL; + + if (sk != NULL && X509_STORE_CTX_get0_chain(ctx) != NULL) { + s->verified_chain = X509_STORE_CTX_get1_chain(ctx); + if (s->verified_chain == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + i = 0; + } + } + + /* Move peername from the store context params to the SSL handle's */ + X509_VERIFY_PARAM_move_peername(s->param, param); + + end: + X509_STORE_CTX_free(ctx); + return i; +} + +/* + * Verify a raw public key + * Return codes: + * 1: Verify success + * 0: Verify failure or error + * -1: Retry required + */ +int ssl_verify_rpk(SSL_CONNECTION *s, EVP_PKEY *rpk) +{ + return ssl_verify_internal(s, NULL, rpk); +} + +/* + * Verify a certificate chain + * Return codes: + * 1: Verify success + * 0: Verify failure or error + * -1: Retry required + */ +int ssl_verify_cert_chain(SSL_CONNECTION *s, STACK_OF(X509) *sk) +{ + return ssl_verify_internal(s, sk, NULL); +} + +static void set0_CA_list(STACK_OF(X509_NAME) **ca_list, + STACK_OF(X509_NAME) *name_list) +{ + sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); + *ca_list = name_list; +} + +STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) +{ + int i; + const int num = sk_X509_NAME_num(sk); + STACK_OF(X509_NAME) *ret; + X509_NAME *name; + + ret = sk_X509_NAME_new_reserve(NULL, num); + if (ret == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB); + return NULL; + } + for (i = 0; i < num; i++) { + name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); + if (name == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + sk_X509_NAME_pop_free(ret, X509_NAME_free); + return NULL; + } + sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */ + } + return ret; +} + +void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) +{ + SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s); + + if (sc == NULL) + return; + + set0_CA_list(&sc->ca_names, name_list); +} + +void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) +{ + set0_CA_list(&ctx->ca_names, name_list); +} + +const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx) +{ + return ctx->ca_names; +} + +const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s) +{ + const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s); + + if (sc == NULL) + return NULL; + + return sc->ca_names != NULL ? sc->ca_names : s->ctx->ca_names; +} + +void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) +{ + set0_CA_list(&ctx->client_ca_names, name_list); +} + +STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) +{ + return ctx->client_ca_names; +} + +void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) +{ + SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s); + + if (sc == NULL) + return; + + set0_CA_list(&sc->client_ca_names, name_list); +} + +const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s) +{ + const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s); + + if (sc == NULL) + return NULL; + + return sc->s3.tmp.peer_ca_names; +} + +STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) +{ + const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s); + + if (sc == NULL) + return NULL; + + if (!sc->server) + return sc->s3.tmp.peer_ca_names; + return sc->client_ca_names != NULL ? sc->client_ca_names + : s->ctx->client_ca_names; +} + +static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x) +{ + X509_NAME *name; + + if (x == NULL) + return 0; + if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL)) + return 0; + + if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) + return 0; + + if (!sk_X509_NAME_push(*sk, name)) { + X509_NAME_free(name); + return 0; + } + return 1; +} + +int SSL_add1_to_CA_list(SSL *ssl, const X509 *x) +{ + SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl); + + if (sc == NULL) + return 0; + + return add_ca_name(&sc->ca_names, x); +} + +int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x) +{ + return add_ca_name(&ctx->ca_names, x); +} + +/* + * The following two are older names are to be replaced with + * SSL(_CTX)_add1_to_CA_list + */ +int SSL_add_client_CA(SSL *ssl, X509 *x) +{ + SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl); + + if (sc == NULL) + return 0; + + return add_ca_name(&sc->client_ca_names, x); +} + +int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) +{ + return add_ca_name(&ctx->client_ca_names, x); +} + +static int xname_cmp(const X509_NAME *a, const X509_NAME *b) +{ + unsigned char *abuf = NULL, *bbuf = NULL; + int alen, blen, ret; + + /* X509_NAME_cmp() itself casts away constness in this way, so + * assume it's safe: + */ + alen = i2d_X509_NAME((X509_NAME *)a, &abuf); + blen = i2d_X509_NAME((X509_NAME *)b, &bbuf); + + if (alen < 0 || blen < 0) + ret = -2; + else if (alen != blen) + ret = alen - blen; + else /* alen == blen */ + ret = memcmp(abuf, bbuf, alen); + + OPENSSL_free(abuf); + OPENSSL_free(bbuf); + + return ret; +} + +static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b) +{ + return xname_cmp(*a, *b); +} + +static unsigned long xname_hash(const X509_NAME *a) +{ + /* This returns 0 also if SHA1 is not available */ + return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL); +} + +STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file, + OSSL_LIB_CTX *libctx, + const char *propq) +{ + BIO *in = BIO_new(BIO_s_file()); + X509 *x = NULL; + X509_NAME *xn = NULL; + STACK_OF(X509_NAME) *ret = NULL; + LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); + OSSL_LIB_CTX *prev_libctx = NULL; + + if (file == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER); + goto err; + } + if (name_hash == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB); + goto err; + } + if (in == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_BIO_LIB); + goto err; + } + + x = X509_new_ex(libctx, propq); + if (x == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + goto err; + } + if (BIO_read_filename(in, file) <= 0) + goto err; + + /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */ + prev_libctx = OSSL_LIB_CTX_set0_default(libctx); + for (;;) { + if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) + break; + if (ret == NULL) { + ret = sk_X509_NAME_new_null(); + if (ret == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB); + goto err; + } + } + if ((xn = X509_get_subject_name(x)) == NULL) + goto err; + /* check for duplicates */ + xn = X509_NAME_dup(xn); + if (xn == NULL) + goto err; + if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { + /* Duplicate. */ + X509_NAME_free(xn); + xn = NULL; + } else { + lh_X509_NAME_insert(name_hash, xn); + if (!sk_X509_NAME_push(ret, xn)) + goto err; + } + } + goto done; + + err: + X509_NAME_free(xn); + sk_X509_NAME_pop_free(ret, X509_NAME_free); + ret = NULL; + done: + /* restore the old libctx */ + OSSL_LIB_CTX_set0_default(prev_libctx); + BIO_free(in); + X509_free(x); + lh_X509_NAME_free(name_hash); + if (ret != NULL) + ERR_clear_error(); + return ret; +} + +STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) +{ + return SSL_load_client_CA_file_ex(file, NULL, NULL); +} + +static int add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, + const char *file, + LHASH_OF(X509_NAME) *name_hash) +{ + BIO *in; + X509 *x = NULL; + X509_NAME *xn = NULL; + int ret = 1; + + in = BIO_new(BIO_s_file()); + + if (in == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_BIO_LIB); + goto err; + } + + if (BIO_read_filename(in, file) <= 0) + goto err; + + for (;;) { + if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) + break; + if ((xn = X509_get_subject_name(x)) == NULL) + goto err; + xn = X509_NAME_dup(xn); + if (xn == NULL) + goto err; + if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) { + /* Duplicate. */ + X509_NAME_free(xn); + } else if (!sk_X509_NAME_push(stack, xn)) { + X509_NAME_free(xn); + goto err; + } else { + /* Successful insert, add to hash table */ + lh_X509_NAME_insert(name_hash, xn); + } + } + + ERR_clear_error(); + goto done; + + err: + ret = 0; + done: + BIO_free(in); + X509_free(x); + return ret; +} + +int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, + const char *file) +{ + X509_NAME *xn = NULL; + int ret = 1; + int idx = 0; + int num = 0; + LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); + + if (file == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER); + goto err; + } + + if (name_hash == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB); + goto err; + } + + /* + * Pre-populate the lhash with the existing entries of the stack, since + * using the LHASH_OF is much faster for duplicate checking. That's because + * xname_cmp converts the X509_NAMEs to DER involving a memory allocation + * for every single invocation of the comparison function. + */ + num = sk_X509_NAME_num(stack); + for (idx = 0; idx < num; idx++) { + xn = sk_X509_NAME_value(stack, idx); + lh_X509_NAME_insert(name_hash, xn); + } + + ret = add_file_cert_subjects_to_stack(stack, file, name_hash); + goto done; + + err: + ret = 0; + done: + lh_X509_NAME_free(name_hash); + return ret; +} + +int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, + const char *dir) +{ + OPENSSL_DIR_CTX *d = NULL; + const char *filename; + int ret = 0; + X509_NAME *xn = NULL; + int idx = 0; + int num = 0; + LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp); + + if (name_hash == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_CRYPTO_LIB); + goto err; + } + + /* + * Pre-populate the lhash with the existing entries of the stack, since + * using the LHASH_OF is much faster for duplicate checking. That's because + * xname_cmp converts the X509_NAMEs to DER involving a memory allocation + * for every single invocation of the comparison function. + */ + num = sk_X509_NAME_num(stack); + for (idx = 0; idx < num; idx++) { + xn = sk_X509_NAME_value(stack, idx); + lh_X509_NAME_insert(name_hash, xn); + } + + while ((filename = OPENSSL_DIR_read(&d, dir))) { + char buf[1024]; + int r; +#ifndef OPENSSL_NO_POSIX_IO + struct stat st; + +#else + /* Cannot use stat so just skip current and parent directories */ + if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0) + continue; +#endif + if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { + ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG); + goto err; + } +#ifdef OPENSSL_SYS_VMS + r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename); +#else + r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename); +#endif +#ifndef OPENSSL_NO_POSIX_IO + /* Skip subdirectories */ + if (!stat(buf, &st) && S_ISDIR(st.st_mode)) + continue; +#endif + if (r <= 0 || r >= (int)sizeof(buf)) + goto err; + if (!add_file_cert_subjects_to_stack(stack, buf, name_hash)) + goto err; + } + + if (errno) { + ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(), + "calling OPENSSL_dir_read(%s)", dir); + ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB); + goto err; + } + + ret = 1; + + err: + if (d) + OPENSSL_DIR_end(&d); + lh_X509_NAME_free(name_hash); + + return ret; +} + +static int add_uris_recursive(STACK_OF(X509_NAME) *stack, + const char *uri, int depth) +{ + int ok = 1; + OSSL_STORE_CTX *ctx = NULL; + X509 *x = NULL; + X509_NAME *xn = NULL; + OSSL_STORE_INFO *info = NULL; + + if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL) + goto err; + + while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) { + int infotype; + + if ((info = OSSL_STORE_load(ctx)) == NULL) + continue; + infotype = OSSL_STORE_INFO_get_type(info); + + if (infotype == OSSL_STORE_INFO_NAME) { + /* + * This is an entry in the "directory" represented by the current + * uri. if |depth| allows, dive into it. + */ + if (depth > 0) + ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info), + depth - 1); + } else if (infotype == OSSL_STORE_INFO_CERT) { + if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL + || (xn = X509_get_subject_name(x)) == NULL + || (xn = X509_NAME_dup(xn)) == NULL) + goto err; + if (sk_X509_NAME_find(stack, xn) >= 0) { + /* Duplicate. */ + X509_NAME_free(xn); + } else if (!sk_X509_NAME_push(stack, xn)) { + X509_NAME_free(xn); + goto err; + } + } + + OSSL_STORE_INFO_free(info); + info = NULL; + } + + ERR_clear_error(); + goto done; + + err: + ok = 0; + OSSL_STORE_INFO_free(info); + done: + OSSL_STORE_close(ctx); + + return ok; +} + +int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, + const char *store) +{ + int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b) + = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp); + int ret = add_uris_recursive(stack, store, 1); + + (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); + return ret; +} + +/* Build a certificate chain for current certificate */ +int ssl_build_cert_chain(SSL_CONNECTION *s, SSL_CTX *ctx, int flags) +{ + CERT *c = s != NULL ? s->cert : ctx->cert; + CERT_PKEY *cpk = c->key; + X509_STORE *chain_store = NULL; + X509_STORE_CTX *xs_ctx = NULL; + STACK_OF(X509) *chain = NULL, *untrusted = NULL; + X509 *x; + SSL_CTX *real_ctx = (s == NULL) ? ctx : SSL_CONNECTION_GET_CTX(s); + int i, rv = 0; + + if (cpk->x509 == NULL) { + ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET); + goto err; + } + /* Rearranging and check the chain: add everything to a store */ + if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { + chain_store = X509_STORE_new(); + if (chain_store == NULL) + goto err; + for (i = 0; i < sk_X509_num(cpk->chain); i++) { + x = sk_X509_value(cpk->chain, i); + if (!X509_STORE_add_cert(chain_store, x)) + goto err; + } + /* Add EE cert too: it might be self signed */ + if (!X509_STORE_add_cert(chain_store, cpk->x509)) + goto err; + } else { + if (c->chain_store != NULL) + chain_store = c->chain_store; + else + chain_store = real_ctx->cert_store; + + if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) + untrusted = cpk->chain; + } + + xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq); + if (xs_ctx == NULL) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + goto err; + } + if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) { + ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB); + goto err; + } + /* Set suite B flags if needed */ + X509_STORE_CTX_set_flags(xs_ctx, + c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS); + + i = X509_verify_cert(xs_ctx); + if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { + if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) + ERR_clear_error(); + i = 1; + rv = 2; + } + if (i > 0) + chain = X509_STORE_CTX_get1_chain(xs_ctx); + if (i <= 0) { + i = X509_STORE_CTX_get_error(xs_ctx); + ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED, + "Verify error:%s", X509_verify_cert_error_string(i)); + + goto err; + } + /* Remove EE certificate from chain */ + x = sk_X509_shift(chain); + X509_free(x); + if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { + if (sk_X509_num(chain) > 0) { + /* See if last cert is self signed */ + x = sk_X509_value(chain, sk_X509_num(chain) - 1); + if (X509_get_extension_flags(x) & EXFLAG_SS) { + x = sk_X509_pop(chain); + X509_free(x); + } + } + } + /* + * Check security level of all CA certificates: EE will have been checked + * already. + */ + for (i = 0; i < sk_X509_num(chain); i++) { + x = sk_X509_value(chain, i); + rv = ssl_security_cert(s, ctx, x, 0, 0); + if (rv != 1) { + ERR_raise(ERR_LIB_SSL, rv); + OSSL_STACK_OF_X509_free(chain); + rv = 0; + goto err; + } + } + OSSL_STACK_OF_X509_free(cpk->chain); + cpk->chain = chain; + if (rv == 0) + rv = 1; + err: + if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) + X509_STORE_free(chain_store); + X509_STORE_CTX_free(xs_ctx); + + return rv; +} + +int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) +{ + X509_STORE **pstore; + + if (ref && store && !X509_STORE_up_ref(store)) + return 0; + + if (chain) + pstore = &c->chain_store; + else + pstore = &c->verify_store; + X509_STORE_free(*pstore); + *pstore = store; + + return 1; +} + +int ssl_cert_get_cert_store(CERT *c, X509_STORE **pstore, int chain) +{ + *pstore = (chain ? c->chain_store : c->verify_store); + return 1; +} + +int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp) +{ + int level; + /* + * note that there's a corresponding minbits_table + * in crypto/x509/x509_vfy.c that's used for checking the security level + * of RSA and DSA keys + */ + static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 }; + + if (ctx != NULL) + level = SSL_CTX_get_security_level(ctx); + else + level = SSL_get_security_level(s); + + if (level > 5) + level = 5; + else if (level < 0) + level = 0; + + if (levelp != NULL) + *levelp = level; + + return minbits_table[level]; +} + +static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, + int op, int bits, int nid, void *other, + void *ex) +{ + int level, minbits, pfs_mask; + const SSL_CONNECTION *sc; + + minbits = ssl_get_security_level_bits(s, ctx, &level); + + if (level == 0) { + /* + * No EDH keys weaker than 1024-bits even at level 0, otherwise, + * anything goes. + */ + if (op == SSL_SECOP_TMP_DH && bits < 80) + return 0; + return 1; + } + switch (op) { + case SSL_SECOP_CIPHER_SUPPORTED: + case SSL_SECOP_CIPHER_SHARED: + case SSL_SECOP_CIPHER_CHECK: + { + const SSL_CIPHER *c = other; + /* No ciphers below security level */ + if (bits < minbits) + return 0; + /* No unauthenticated ciphersuites */ + if (c->algorithm_auth & SSL_aNULL) + return 0; + /* No MD5 mac ciphersuites */ + if (c->algorithm_mac & SSL_MD5) + return 0; + /* SHA1 HMAC is 160 bits of security */ + if (minbits > 160 && c->algorithm_mac & SSL_SHA1) + return 0; + /* Level 3: forward secure ciphersuites only */ + pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK; + if (level >= 3 && c->min_tls != TLS1_3_VERSION && + !(c->algorithm_mkey & pfs_mask)) + return 0; + break; + } + case SSL_SECOP_VERSION: + if ((sc = SSL_CONNECTION_FROM_CONST_SSL(s)) == NULL) + return 0; + if (!SSL_CONNECTION_IS_DTLS(sc)) { + /* SSLv3, TLS v1.0 and TLS v1.1 only allowed at level 0 */ + if (nid <= TLS1_1_VERSION && level > 0) + return 0; + } else { + /* DTLS v1.0 only allowed at level 0 */ + if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level > 0) + return 0; + } + break; + + case SSL_SECOP_COMPRESSION: + if (level >= 2) + return 0; + break; + case SSL_SECOP_TICKET: + if (level >= 3) + return 0; + break; + default: + if (bits < minbits) + return 0; + } + return 1; +} + +int ssl_security(const SSL_CONNECTION *s, int op, int bits, int nid, void *other) +{ + return s->cert->sec_cb(SSL_CONNECTION_GET_USER_SSL(s), NULL, op, bits, nid, + other, s->cert->sec_ex); +} + +int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other) +{ + return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, + ctx->cert->sec_ex); +} + +int ssl_cert_lookup_by_nid(int nid, size_t *pidx, SSL_CTX *ctx) +{ + size_t i; + + for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { + if (ssl_cert_info[i].nid == nid) { + *pidx = i; + return 1; + } + } + for (i = 0; i < ctx->sigalg_list_len; i++) { + if (ctx->ssl_cert_info[i].nid == nid) { + *pidx = SSL_PKEY_NUM + i; + return 1; + } + } + return 0; +} + +const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx, SSL_CTX *ctx) +{ + size_t i; + + /* check classic pk types */ + for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) { + const SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i]; + + if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid)) + || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) { + if (pidx != NULL) + *pidx = i; + return tmp_lu; + } + } + /* check provider-loaded pk types */ + for (i = 0; i < ctx->sigalg_list_len; i++) { + SSL_CERT_LOOKUP *tmp_lu = &(ctx->ssl_cert_info[i]); + + if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid)) + || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) { + if (pidx != NULL) + *pidx = SSL_PKEY_NUM + i; + return &ctx->ssl_cert_info[i]; + } + } + + return NULL; +} + +const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx, SSL_CTX *ctx) +{ + if (idx >= (OSSL_NELEM(ssl_cert_info) + ctx->sigalg_list_len)) + return NULL; + else if (idx >= (OSSL_NELEM(ssl_cert_info))) + return &(ctx->ssl_cert_info[idx - SSL_PKEY_NUM]); + return &ssl_cert_info[idx]; +} |