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493 lines
14 KiB
C
493 lines
14 KiB
C
/*
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* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include <openssl/crypto.h>
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#include "internal/cryptlib.h"
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#include <openssl/pem.h>
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#include <openssl/engine.h>
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#include <openssl/ts.h>
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/* Macro definitions for the configuration file. */
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#define BASE_SECTION "tsa"
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#define ENV_DEFAULT_TSA "default_tsa"
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#define ENV_SERIAL "serial"
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#define ENV_CRYPTO_DEVICE "crypto_device"
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#define ENV_SIGNER_CERT "signer_cert"
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#define ENV_CERTS "certs"
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#define ENV_SIGNER_KEY "signer_key"
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#define ENV_SIGNER_DIGEST "signer_digest"
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#define ENV_DEFAULT_POLICY "default_policy"
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#define ENV_OTHER_POLICIES "other_policies"
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#define ENV_DIGESTS "digests"
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#define ENV_ACCURACY "accuracy"
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#define ENV_ORDERING "ordering"
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#define ENV_TSA_NAME "tsa_name"
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#define ENV_ESS_CERT_ID_CHAIN "ess_cert_id_chain"
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#define ENV_VALUE_SECS "secs"
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#define ENV_VALUE_MILLISECS "millisecs"
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#define ENV_VALUE_MICROSECS "microsecs"
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#define ENV_CLOCK_PRECISION_DIGITS "clock_precision_digits"
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#define ENV_VALUE_YES "yes"
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#define ENV_VALUE_NO "no"
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#define ENV_ESS_CERT_ID_ALG "ess_cert_id_alg"
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/* Function definitions for certificate and key loading. */
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X509 *TS_CONF_load_cert(const char *file)
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{
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BIO *cert = NULL;
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X509 *x = NULL;
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if ((cert = BIO_new_file(file, "r")) == NULL)
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goto end;
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x = PEM_read_bio_X509_AUX(cert, NULL, NULL, NULL);
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end:
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if (x == NULL)
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TSerr(TS_F_TS_CONF_LOAD_CERT, TS_R_CANNOT_LOAD_CERT);
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BIO_free(cert);
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return x;
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}
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STACK_OF(X509) *TS_CONF_load_certs(const char *file)
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{
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BIO *certs = NULL;
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STACK_OF(X509) *othercerts = NULL;
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STACK_OF(X509_INFO) *allcerts = NULL;
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int i;
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if ((certs = BIO_new_file(file, "r")) == NULL)
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goto end;
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if ((othercerts = sk_X509_new_null()) == NULL)
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goto end;
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allcerts = PEM_X509_INFO_read_bio(certs, NULL, NULL, NULL);
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for (i = 0; i < sk_X509_INFO_num(allcerts); i++) {
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X509_INFO *xi = sk_X509_INFO_value(allcerts, i);
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if (xi->x509) {
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sk_X509_push(othercerts, xi->x509);
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xi->x509 = NULL;
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}
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}
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end:
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if (othercerts == NULL)
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TSerr(TS_F_TS_CONF_LOAD_CERTS, TS_R_CANNOT_LOAD_CERT);
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sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
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BIO_free(certs);
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return othercerts;
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}
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EVP_PKEY *TS_CONF_load_key(const char *file, const char *pass)
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{
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BIO *key = NULL;
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EVP_PKEY *pkey = NULL;
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if ((key = BIO_new_file(file, "r")) == NULL)
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goto end;
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pkey = PEM_read_bio_PrivateKey(key, NULL, NULL, (char *)pass);
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end:
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if (pkey == NULL)
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TSerr(TS_F_TS_CONF_LOAD_KEY, TS_R_CANNOT_LOAD_KEY);
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BIO_free(key);
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return pkey;
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}
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/* Function definitions for handling configuration options. */
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static void ts_CONF_lookup_fail(const char *name, const char *tag)
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{
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TSerr(TS_F_TS_CONF_LOOKUP_FAIL, TS_R_VAR_LOOKUP_FAILURE);
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ERR_add_error_data(3, name, "::", tag);
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}
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static void ts_CONF_invalid(const char *name, const char *tag)
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{
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TSerr(TS_F_TS_CONF_INVALID, TS_R_VAR_BAD_VALUE);
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ERR_add_error_data(3, name, "::", tag);
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}
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const char *TS_CONF_get_tsa_section(CONF *conf, const char *section)
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{
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if (!section) {
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section = NCONF_get_string(conf, BASE_SECTION, ENV_DEFAULT_TSA);
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if (!section)
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ts_CONF_lookup_fail(BASE_SECTION, ENV_DEFAULT_TSA);
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}
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return section;
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}
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int TS_CONF_set_serial(CONF *conf, const char *section, TS_serial_cb cb,
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TS_RESP_CTX *ctx)
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{
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int ret = 0;
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char *serial = NCONF_get_string(conf, section, ENV_SERIAL);
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if (!serial) {
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ts_CONF_lookup_fail(section, ENV_SERIAL);
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goto err;
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}
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TS_RESP_CTX_set_serial_cb(ctx, cb, serial);
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ret = 1;
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err:
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return ret;
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}
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#ifndef OPENSSL_NO_ENGINE
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int TS_CONF_set_crypto_device(CONF *conf, const char *section,
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const char *device)
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{
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int ret = 0;
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if (device == NULL)
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device = NCONF_get_string(conf, section, ENV_CRYPTO_DEVICE);
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if (device && !TS_CONF_set_default_engine(device)) {
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ts_CONF_invalid(section, ENV_CRYPTO_DEVICE);
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goto err;
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}
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ret = 1;
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err:
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return ret;
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}
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int TS_CONF_set_default_engine(const char *name)
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{
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ENGINE *e = NULL;
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int ret = 0;
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if (strcmp(name, "builtin") == 0)
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return 1;
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if ((e = ENGINE_by_id(name)) == NULL)
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goto err;
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if (strcmp(name, "chil") == 0)
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ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0);
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if (!ENGINE_set_default(e, ENGINE_METHOD_ALL))
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goto err;
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ret = 1;
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err:
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if (!ret) {
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TSerr(TS_F_TS_CONF_SET_DEFAULT_ENGINE, TS_R_COULD_NOT_SET_ENGINE);
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ERR_add_error_data(2, "engine:", name);
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}
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ENGINE_free(e);
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return ret;
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}
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#endif
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int TS_CONF_set_signer_cert(CONF *conf, const char *section,
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const char *cert, TS_RESP_CTX *ctx)
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{
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int ret = 0;
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X509 *cert_obj = NULL;
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if (cert == NULL) {
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cert = NCONF_get_string(conf, section, ENV_SIGNER_CERT);
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if (cert == NULL) {
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ts_CONF_lookup_fail(section, ENV_SIGNER_CERT);
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goto err;
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}
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}
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if ((cert_obj = TS_CONF_load_cert(cert)) == NULL)
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goto err;
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if (!TS_RESP_CTX_set_signer_cert(ctx, cert_obj))
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goto err;
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ret = 1;
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err:
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X509_free(cert_obj);
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return ret;
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}
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int TS_CONF_set_certs(CONF *conf, const char *section, const char *certs,
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TS_RESP_CTX *ctx)
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{
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int ret = 0;
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STACK_OF(X509) *certs_obj = NULL;
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if (certs == NULL) {
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/* Certificate chain is optional. */
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if ((certs = NCONF_get_string(conf, section, ENV_CERTS)) == NULL)
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goto end;
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}
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if ((certs_obj = TS_CONF_load_certs(certs)) == NULL)
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goto err;
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if (!TS_RESP_CTX_set_certs(ctx, certs_obj))
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goto err;
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end:
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ret = 1;
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err:
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sk_X509_pop_free(certs_obj, X509_free);
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return ret;
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}
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int TS_CONF_set_signer_key(CONF *conf, const char *section,
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const char *key, const char *pass,
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TS_RESP_CTX *ctx)
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{
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int ret = 0;
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EVP_PKEY *key_obj = NULL;
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if (!key)
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key = NCONF_get_string(conf, section, ENV_SIGNER_KEY);
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if (!key) {
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ts_CONF_lookup_fail(section, ENV_SIGNER_KEY);
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goto err;
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}
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if ((key_obj = TS_CONF_load_key(key, pass)) == NULL)
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goto err;
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if (!TS_RESP_CTX_set_signer_key(ctx, key_obj))
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goto err;
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ret = 1;
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err:
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EVP_PKEY_free(key_obj);
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return ret;
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}
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int TS_CONF_set_signer_digest(CONF *conf, const char *section,
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const char *md, TS_RESP_CTX *ctx)
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{
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int ret = 0;
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const EVP_MD *sign_md = NULL;
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if (md == NULL)
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md = NCONF_get_string(conf, section, ENV_SIGNER_DIGEST);
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if (md == NULL) {
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ts_CONF_lookup_fail(section, ENV_SIGNER_DIGEST);
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goto err;
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}
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sign_md = EVP_get_digestbyname(md);
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if (sign_md == NULL) {
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ts_CONF_invalid(section, ENV_SIGNER_DIGEST);
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goto err;
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}
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if (!TS_RESP_CTX_set_signer_digest(ctx, sign_md))
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goto err;
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ret = 1;
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err:
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return ret;
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}
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int TS_CONF_set_def_policy(CONF *conf, const char *section,
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const char *policy, TS_RESP_CTX *ctx)
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{
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int ret = 0;
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ASN1_OBJECT *policy_obj = NULL;
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if (!policy)
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policy = NCONF_get_string(conf, section, ENV_DEFAULT_POLICY);
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if (!policy) {
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ts_CONF_lookup_fail(section, ENV_DEFAULT_POLICY);
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goto err;
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}
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if ((policy_obj = OBJ_txt2obj(policy, 0)) == NULL) {
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ts_CONF_invalid(section, ENV_DEFAULT_POLICY);
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goto err;
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}
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if (!TS_RESP_CTX_set_def_policy(ctx, policy_obj))
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goto err;
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ret = 1;
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err:
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ASN1_OBJECT_free(policy_obj);
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return ret;
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}
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int TS_CONF_set_policies(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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{
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int ret = 0;
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int i;
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STACK_OF(CONF_VALUE) *list = NULL;
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char *policies = NCONF_get_string(conf, section, ENV_OTHER_POLICIES);
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/* If no other policy is specified, that's fine. */
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if (policies && (list = X509V3_parse_list(policies)) == NULL) {
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ts_CONF_invalid(section, ENV_OTHER_POLICIES);
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goto err;
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}
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for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
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CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
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const char *extval = val->value ? val->value : val->name;
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ASN1_OBJECT *objtmp;
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if ((objtmp = OBJ_txt2obj(extval, 0)) == NULL) {
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ts_CONF_invalid(section, ENV_OTHER_POLICIES);
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goto err;
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}
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if (!TS_RESP_CTX_add_policy(ctx, objtmp))
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goto err;
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ASN1_OBJECT_free(objtmp);
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}
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ret = 1;
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err:
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sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
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return ret;
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}
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int TS_CONF_set_digests(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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{
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int ret = 0;
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int i;
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STACK_OF(CONF_VALUE) *list = NULL;
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char *digests = NCONF_get_string(conf, section, ENV_DIGESTS);
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if (digests == NULL) {
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ts_CONF_lookup_fail(section, ENV_DIGESTS);
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goto err;
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}
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if ((list = X509V3_parse_list(digests)) == NULL) {
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ts_CONF_invalid(section, ENV_DIGESTS);
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goto err;
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}
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if (sk_CONF_VALUE_num(list) == 0) {
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ts_CONF_invalid(section, ENV_DIGESTS);
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goto err;
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}
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for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
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CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
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const char *extval = val->value ? val->value : val->name;
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const EVP_MD *md;
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if ((md = EVP_get_digestbyname(extval)) == NULL) {
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ts_CONF_invalid(section, ENV_DIGESTS);
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goto err;
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}
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if (!TS_RESP_CTX_add_md(ctx, md))
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goto err;
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}
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ret = 1;
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err:
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sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
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return ret;
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}
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int TS_CONF_set_accuracy(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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{
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int ret = 0;
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int i;
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int secs = 0, millis = 0, micros = 0;
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STACK_OF(CONF_VALUE) *list = NULL;
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char *accuracy = NCONF_get_string(conf, section, ENV_ACCURACY);
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if (accuracy && (list = X509V3_parse_list(accuracy)) == NULL) {
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ts_CONF_invalid(section, ENV_ACCURACY);
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goto err;
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}
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for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
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CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
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if (strcmp(val->name, ENV_VALUE_SECS) == 0) {
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if (val->value)
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secs = atoi(val->value);
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} else if (strcmp(val->name, ENV_VALUE_MILLISECS) == 0) {
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if (val->value)
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millis = atoi(val->value);
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} else if (strcmp(val->name, ENV_VALUE_MICROSECS) == 0) {
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if (val->value)
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micros = atoi(val->value);
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} else {
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ts_CONF_invalid(section, ENV_ACCURACY);
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goto err;
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}
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}
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if (!TS_RESP_CTX_set_accuracy(ctx, secs, millis, micros))
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goto err;
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ret = 1;
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err:
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sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
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return ret;
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}
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int TS_CONF_set_clock_precision_digits(CONF *conf, const char *section,
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TS_RESP_CTX *ctx)
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{
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int ret = 0;
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long digits = 0;
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/*
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* If not specified, set the default value to 0, i.e. sec precision
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*/
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if (!NCONF_get_number_e(conf, section, ENV_CLOCK_PRECISION_DIGITS,
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&digits))
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digits = 0;
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if (digits < 0 || digits > TS_MAX_CLOCK_PRECISION_DIGITS) {
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ts_CONF_invalid(section, ENV_CLOCK_PRECISION_DIGITS);
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goto err;
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}
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if (!TS_RESP_CTX_set_clock_precision_digits(ctx, digits))
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goto err;
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return 1;
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err:
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return ret;
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}
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static int ts_CONF_add_flag(CONF *conf, const char *section,
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const char *field, int flag, TS_RESP_CTX *ctx)
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{
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const char *value = NCONF_get_string(conf, section, field);
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if (value) {
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if (strcmp(value, ENV_VALUE_YES) == 0)
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TS_RESP_CTX_add_flags(ctx, flag);
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else if (strcmp(value, ENV_VALUE_NO) != 0) {
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ts_CONF_invalid(section, field);
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return 0;
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}
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}
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return 1;
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}
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int TS_CONF_set_ordering(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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{
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return ts_CONF_add_flag(conf, section, ENV_ORDERING, TS_ORDERING, ctx);
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}
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int TS_CONF_set_tsa_name(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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{
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return ts_CONF_add_flag(conf, section, ENV_TSA_NAME, TS_TSA_NAME, ctx);
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}
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int TS_CONF_set_ess_cert_id_chain(CONF *conf, const char *section,
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TS_RESP_CTX *ctx)
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{
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return ts_CONF_add_flag(conf, section, ENV_ESS_CERT_ID_CHAIN,
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TS_ESS_CERT_ID_CHAIN, ctx);
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}
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int TS_CONF_set_ess_cert_id_digest(CONF *conf, const char *section,
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TS_RESP_CTX *ctx)
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{
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int ret = 0;
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const EVP_MD *cert_md = NULL;
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const char *md = NCONF_get_string(conf, section, ENV_ESS_CERT_ID_ALG);
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if (md == NULL)
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md = "sha1";
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cert_md = EVP_get_digestbyname(md);
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if (cert_md == NULL) {
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ts_CONF_invalid(section, ENV_ESS_CERT_ID_ALG);
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goto err;
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}
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if (!TS_RESP_CTX_set_ess_cert_id_digest(ctx, cert_md))
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goto err;
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ret = 1;
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err:
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return ret;
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}
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