[331] | 1 | /*
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| 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <string.h>
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| 11 |
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| 12 | #include <openssl/crypto.h>
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| 13 | #include "internal/cryptlib.h"
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| 14 | #include <openssl/pem.h>
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| 15 | #include <openssl/engine.h>
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| 16 | #include <openssl/ts.h>
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| 17 |
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| 18 | /* Macro definitions for the configuration file. */
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| 19 | #define BASE_SECTION "tsa"
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| 20 | #define ENV_DEFAULT_TSA "default_tsa"
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| 21 | #define ENV_SERIAL "serial"
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| 22 | #define ENV_CRYPTO_DEVICE "crypto_device"
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| 23 | #define ENV_SIGNER_CERT "signer_cert"
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| 24 | #define ENV_CERTS "certs"
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| 25 | #define ENV_SIGNER_KEY "signer_key"
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| 26 | #define ENV_SIGNER_DIGEST "signer_digest"
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| 27 | #define ENV_DEFAULT_POLICY "default_policy"
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| 28 | #define ENV_OTHER_POLICIES "other_policies"
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| 29 | #define ENV_DIGESTS "digests"
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| 30 | #define ENV_ACCURACY "accuracy"
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| 31 | #define ENV_ORDERING "ordering"
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| 32 | #define ENV_TSA_NAME "tsa_name"
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| 33 | #define ENV_ESS_CERT_ID_CHAIN "ess_cert_id_chain"
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| 34 | #define ENV_VALUE_SECS "secs"
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| 35 | #define ENV_VALUE_MILLISECS "millisecs"
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| 36 | #define ENV_VALUE_MICROSECS "microsecs"
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| 37 | #define ENV_CLOCK_PRECISION_DIGITS "clock_precision_digits"
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| 38 | #define ENV_VALUE_YES "yes"
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| 39 | #define ENV_VALUE_NO "no"
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| 40 |
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| 41 | /* Function definitions for certificate and key loading. */
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| 42 |
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| 43 | X509 *TS_CONF_load_cert(const char *file)
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| 44 | {
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| 45 | BIO *cert = NULL;
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| 46 | X509 *x = NULL;
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| 47 |
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| 48 | if ((cert = BIO_new_file(file, "r")) == NULL)
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| 49 | goto end;
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| 50 | x = PEM_read_bio_X509_AUX(cert, NULL, NULL, NULL);
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| 51 | end:
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| 52 | if (x == NULL)
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| 53 | TSerr(TS_F_TS_CONF_LOAD_CERT, TS_R_CANNOT_LOAD_CERT);
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| 54 | BIO_free(cert);
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| 55 | return x;
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| 56 | }
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| 57 |
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| 58 | STACK_OF(X509) *TS_CONF_load_certs(const char *file)
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| 59 | {
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| 60 | BIO *certs = NULL;
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| 61 | STACK_OF(X509) *othercerts = NULL;
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| 62 | STACK_OF(X509_INFO) *allcerts = NULL;
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| 63 | int i;
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| 64 |
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| 65 | if ((certs = BIO_new_file(file, "r")) == NULL)
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| 66 | goto end;
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| 67 | if ((othercerts = sk_X509_new_null()) == NULL)
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| 68 | goto end;
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| 69 |
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| 70 | allcerts = PEM_X509_INFO_read_bio(certs, NULL, NULL, NULL);
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| 71 | for (i = 0; i < sk_X509_INFO_num(allcerts); i++) {
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| 72 | X509_INFO *xi = sk_X509_INFO_value(allcerts, i);
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| 73 | if (xi->x509) {
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| 74 | sk_X509_push(othercerts, xi->x509);
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| 75 | xi->x509 = NULL;
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| 76 | }
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| 77 | }
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| 78 | end:
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| 79 | if (othercerts == NULL)
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| 80 | TSerr(TS_F_TS_CONF_LOAD_CERTS, TS_R_CANNOT_LOAD_CERT);
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| 81 | sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
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| 82 | BIO_free(certs);
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| 83 | return othercerts;
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| 84 | }
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| 85 |
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| 86 | EVP_PKEY *TS_CONF_load_key(const char *file, const char *pass)
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| 87 | {
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| 88 | BIO *key = NULL;
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| 89 | EVP_PKEY *pkey = NULL;
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| 90 |
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| 91 | if ((key = BIO_new_file(file, "r")) == NULL)
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| 92 | goto end;
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| 93 | pkey = PEM_read_bio_PrivateKey(key, NULL, NULL, (char *)pass);
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| 94 | end:
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| 95 | if (pkey == NULL)
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| 96 | TSerr(TS_F_TS_CONF_LOAD_KEY, TS_R_CANNOT_LOAD_KEY);
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| 97 | BIO_free(key);
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| 98 | return pkey;
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| 99 | }
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| 100 |
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| 101 | /* Function definitions for handling configuration options. */
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| 102 |
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| 103 | static void ts_CONF_lookup_fail(const char *name, const char *tag)
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| 104 | {
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| 105 | TSerr(TS_F_TS_CONF_LOOKUP_FAIL, TS_R_VAR_LOOKUP_FAILURE);
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| 106 | ERR_add_error_data(3, name, "::", tag);
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| 107 | }
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| 108 |
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| 109 | static void ts_CONF_invalid(const char *name, const char *tag)
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| 110 | {
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| 111 | TSerr(TS_F_TS_CONF_INVALID, TS_R_VAR_BAD_VALUE);
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| 112 | ERR_add_error_data(3, name, "::", tag);
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| 113 | }
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| 114 |
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| 115 | const char *TS_CONF_get_tsa_section(CONF *conf, const char *section)
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| 116 | {
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| 117 | if (!section) {
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| 118 | section = NCONF_get_string(conf, BASE_SECTION, ENV_DEFAULT_TSA);
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| 119 | if (!section)
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| 120 | ts_CONF_lookup_fail(BASE_SECTION, ENV_DEFAULT_TSA);
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| 121 | }
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| 122 | return section;
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| 123 | }
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| 124 |
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| 125 | int TS_CONF_set_serial(CONF *conf, const char *section, TS_serial_cb cb,
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| 126 | TS_RESP_CTX *ctx)
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| 127 | {
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| 128 | int ret = 0;
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| 129 | char *serial = NCONF_get_string(conf, section, ENV_SERIAL);
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| 130 | if (!serial) {
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| 131 | ts_CONF_lookup_fail(section, ENV_SERIAL);
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| 132 | goto err;
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| 133 | }
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| 134 | TS_RESP_CTX_set_serial_cb(ctx, cb, serial);
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| 135 |
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| 136 | ret = 1;
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| 137 | err:
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| 138 | return ret;
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| 139 | }
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| 140 |
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| 141 | #ifndef OPENSSL_NO_ENGINE
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| 142 |
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| 143 | int TS_CONF_set_crypto_device(CONF *conf, const char *section,
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| 144 | const char *device)
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| 145 | {
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| 146 | int ret = 0;
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| 147 |
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| 148 | if (device == NULL)
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| 149 | device = NCONF_get_string(conf, section, ENV_CRYPTO_DEVICE);
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| 150 |
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| 151 | if (device && !TS_CONF_set_default_engine(device)) {
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| 152 | ts_CONF_invalid(section, ENV_CRYPTO_DEVICE);
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| 153 | goto err;
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| 154 | }
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| 155 | ret = 1;
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| 156 | err:
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| 157 | return ret;
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| 158 | }
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| 159 |
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| 160 | int TS_CONF_set_default_engine(const char *name)
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| 161 | {
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| 162 | ENGINE *e = NULL;
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| 163 | int ret = 0;
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| 164 |
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| 165 | if (strcmp(name, "builtin") == 0)
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| 166 | return 1;
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| 167 |
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| 168 | if ((e = ENGINE_by_id(name)) == NULL)
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| 169 | goto err;
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| 170 | if (strcmp(name, "chil") == 0)
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| 171 | ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0);
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| 172 | if (!ENGINE_set_default(e, ENGINE_METHOD_ALL))
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| 173 | goto err;
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| 174 | ret = 1;
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| 175 |
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| 176 | err:
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| 177 | if (!ret) {
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| 178 | TSerr(TS_F_TS_CONF_SET_DEFAULT_ENGINE, TS_R_COULD_NOT_SET_ENGINE);
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| 179 | ERR_add_error_data(2, "engine:", name);
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| 180 | }
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| 181 | ENGINE_free(e);
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| 182 | return ret;
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| 183 | }
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| 184 |
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| 185 | #endif
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| 186 |
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| 187 | int TS_CONF_set_signer_cert(CONF *conf, const char *section,
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| 188 | const char *cert, TS_RESP_CTX *ctx)
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| 189 | {
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| 190 | int ret = 0;
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| 191 | X509 *cert_obj = NULL;
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| 192 |
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| 193 | if (cert == NULL) {
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| 194 | cert = NCONF_get_string(conf, section, ENV_SIGNER_CERT);
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| 195 | if (cert == NULL) {
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| 196 | ts_CONF_lookup_fail(section, ENV_SIGNER_CERT);
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| 197 | goto err;
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| 198 | }
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| 199 | }
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| 200 | if ((cert_obj = TS_CONF_load_cert(cert)) == NULL)
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| 201 | goto err;
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| 202 | if (!TS_RESP_CTX_set_signer_cert(ctx, cert_obj))
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| 203 | goto err;
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| 204 |
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| 205 | ret = 1;
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| 206 | err:
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| 207 | X509_free(cert_obj);
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| 208 | return ret;
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| 209 | }
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| 210 |
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| 211 | int TS_CONF_set_certs(CONF *conf, const char *section, const char *certs,
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| 212 | TS_RESP_CTX *ctx)
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| 213 | {
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| 214 | int ret = 0;
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| 215 | STACK_OF(X509) *certs_obj = NULL;
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| 216 |
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| 217 | if (certs == NULL) {
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| 218 | /* Certificate chain is optional. */
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| 219 | if ((certs = NCONF_get_string(conf, section, ENV_CERTS)) == NULL)
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| 220 | goto end;
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| 221 | }
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| 222 | if ((certs_obj = TS_CONF_load_certs(certs)) == NULL)
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| 223 | goto err;
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| 224 | if (!TS_RESP_CTX_set_certs(ctx, certs_obj))
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| 225 | goto err;
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| 226 | end:
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| 227 | ret = 1;
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| 228 | err:
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| 229 | sk_X509_pop_free(certs_obj, X509_free);
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| 230 | return ret;
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| 231 | }
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| 232 |
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| 233 | int TS_CONF_set_signer_key(CONF *conf, const char *section,
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| 234 | const char *key, const char *pass,
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| 235 | TS_RESP_CTX *ctx)
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| 236 | {
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| 237 | int ret = 0;
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| 238 | EVP_PKEY *key_obj = NULL;
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| 239 | if (!key)
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| 240 | key = NCONF_get_string(conf, section, ENV_SIGNER_KEY);
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| 241 | if (!key) {
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| 242 | ts_CONF_lookup_fail(section, ENV_SIGNER_KEY);
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| 243 | goto err;
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| 244 | }
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| 245 | if ((key_obj = TS_CONF_load_key(key, pass)) == NULL)
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| 246 | goto err;
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| 247 | if (!TS_RESP_CTX_set_signer_key(ctx, key_obj))
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| 248 | goto err;
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| 249 |
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| 250 | ret = 1;
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| 251 | err:
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| 252 | EVP_PKEY_free(key_obj);
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| 253 | return ret;
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| 254 | }
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| 255 |
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| 256 | int TS_CONF_set_signer_digest(CONF *conf, const char *section,
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| 257 | const char *md, TS_RESP_CTX *ctx)
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| 258 | {
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| 259 | int ret = 0;
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| 260 | const EVP_MD *sign_md = NULL;
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| 261 | if (md == NULL)
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| 262 | md = NCONF_get_string(conf, section, ENV_SIGNER_DIGEST);
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| 263 | if (md == NULL) {
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| 264 | ts_CONF_lookup_fail(section, ENV_SIGNER_DIGEST);
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| 265 | goto err;
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| 266 | }
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| 267 | sign_md = EVP_get_digestbyname(md);
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| 268 | if (sign_md == NULL) {
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| 269 | ts_CONF_invalid(section, ENV_SIGNER_DIGEST);
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| 270 | goto err;
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| 271 | }
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| 272 | if (!TS_RESP_CTX_set_signer_digest(ctx, sign_md))
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| 273 | goto err;
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| 274 |
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| 275 | ret = 1;
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| 276 | err:
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| 277 | return ret;
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| 278 | }
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| 279 |
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| 280 | int TS_CONF_set_def_policy(CONF *conf, const char *section,
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| 281 | const char *policy, TS_RESP_CTX *ctx)
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| 282 | {
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| 283 | int ret = 0;
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| 284 | ASN1_OBJECT *policy_obj = NULL;
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| 285 | if (!policy)
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| 286 | policy = NCONF_get_string(conf, section, ENV_DEFAULT_POLICY);
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| 287 | if (!policy) {
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| 288 | ts_CONF_lookup_fail(section, ENV_DEFAULT_POLICY);
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| 289 | goto err;
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| 290 | }
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| 291 | if ((policy_obj = OBJ_txt2obj(policy, 0)) == NULL) {
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| 292 | ts_CONF_invalid(section, ENV_DEFAULT_POLICY);
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| 293 | goto err;
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| 294 | }
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| 295 | if (!TS_RESP_CTX_set_def_policy(ctx, policy_obj))
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| 296 | goto err;
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| 297 |
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| 298 | ret = 1;
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| 299 | err:
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| 300 | ASN1_OBJECT_free(policy_obj);
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| 301 | return ret;
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| 302 | }
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| 303 |
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| 304 | int TS_CONF_set_policies(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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| 305 | {
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| 306 | int ret = 0;
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| 307 | int i;
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| 308 | STACK_OF(CONF_VALUE) *list = NULL;
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| 309 | char *policies = NCONF_get_string(conf, section, ENV_OTHER_POLICIES);
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| 310 |
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| 311 | /* If no other policy is specified, that's fine. */
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| 312 | if (policies && (list = X509V3_parse_list(policies)) == NULL) {
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| 313 | ts_CONF_invalid(section, ENV_OTHER_POLICIES);
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| 314 | goto err;
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| 315 | }
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| 316 | for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
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| 317 | CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
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| 318 | const char *extval = val->value ? val->value : val->name;
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| 319 | ASN1_OBJECT *objtmp;
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| 320 |
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| 321 | if ((objtmp = OBJ_txt2obj(extval, 0)) == NULL) {
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| 322 | ts_CONF_invalid(section, ENV_OTHER_POLICIES);
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| 323 | goto err;
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| 324 | }
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| 325 | if (!TS_RESP_CTX_add_policy(ctx, objtmp))
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| 326 | goto err;
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| 327 | ASN1_OBJECT_free(objtmp);
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| 328 | }
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| 329 |
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| 330 | ret = 1;
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| 331 | err:
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| 332 | sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
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| 333 | return ret;
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| 334 | }
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| 335 |
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| 336 | int TS_CONF_set_digests(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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| 337 | {
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| 338 | int ret = 0;
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| 339 | int i;
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| 340 | STACK_OF(CONF_VALUE) *list = NULL;
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| 341 | char *digests = NCONF_get_string(conf, section, ENV_DIGESTS);
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| 342 |
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| 343 | if (digests == NULL) {
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| 344 | ts_CONF_lookup_fail(section, ENV_DIGESTS);
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| 345 | goto err;
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| 346 | }
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| 347 | if ((list = X509V3_parse_list(digests)) == NULL) {
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| 348 | ts_CONF_invalid(section, ENV_DIGESTS);
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| 349 | goto err;
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| 350 | }
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| 351 | if (sk_CONF_VALUE_num(list) == 0) {
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| 352 | ts_CONF_invalid(section, ENV_DIGESTS);
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| 353 | goto err;
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| 354 | }
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| 355 | for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
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| 356 | CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
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| 357 | const char *extval = val->value ? val->value : val->name;
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| 358 | const EVP_MD *md;
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| 359 |
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| 360 | if ((md = EVP_get_digestbyname(extval)) == NULL) {
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| 361 | ts_CONF_invalid(section, ENV_DIGESTS);
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| 362 | goto err;
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| 363 | }
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| 364 | if (!TS_RESP_CTX_add_md(ctx, md))
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| 365 | goto err;
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| 366 | }
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| 367 |
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| 368 | ret = 1;
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| 369 | err:
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| 370 | sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
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| 371 | return ret;
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| 372 | }
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| 373 |
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| 374 | int TS_CONF_set_accuracy(CONF *conf, const char *section, TS_RESP_CTX *ctx)
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| 375 | {
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| 376 | int ret = 0;
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| 377 | int i;
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| 378 | int secs = 0, millis = 0, micros = 0;
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| 379 | STACK_OF(CONF_VALUE) *list = NULL;
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| 380 | char *accuracy = NCONF_get_string(conf, section, ENV_ACCURACY);
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| 381 |
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| 382 | if (accuracy && (list = X509V3_parse_list(accuracy)) == NULL) {
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| 383 | ts_CONF_invalid(section, ENV_ACCURACY);
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| 384 | goto err;
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| 385 | }
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| 386 | for (i = 0; i < sk_CONF_VALUE_num(list); ++i) {
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| 387 | CONF_VALUE *val = sk_CONF_VALUE_value(list, i);
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| 388 | if (strcmp(val->name, ENV_VALUE_SECS) == 0) {
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| 389 | if (val->value)
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| 390 | secs = atoi(val->value);
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| 391 | } else if (strcmp(val->name, ENV_VALUE_MILLISECS) == 0) {
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| 392 | if (val->value)
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| 393 | millis = atoi(val->value);
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| 394 | } else if (strcmp(val->name, ENV_VALUE_MICROSECS) == 0) {
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| 395 | if (val->value)
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| 396 | micros = atoi(val->value);
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| 397 | } else {
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| 398 | ts_CONF_invalid(section, ENV_ACCURACY);
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| 399 | goto err;
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| 400 | }
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| 401 | }
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| 402 | if (!TS_RESP_CTX_set_accuracy(ctx, secs, millis, micros))
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| 403 | goto err;
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| 404 |
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| 405 | ret = 1;
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| 406 | err:
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| 407 | sk_CONF_VALUE_pop_free(list, X509V3_conf_free);
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| 408 | return ret;
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| 409 | }
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| 410 |
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| 411 | int TS_CONF_set_clock_precision_digits(CONF *conf, const char *section,
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| 412 | TS_RESP_CTX *ctx)
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| 413 | {
|
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| 414 | int ret = 0;
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| 415 | long digits = 0;
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| 416 |
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| 417 | /*
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| 418 | * If not specified, set the default value to 0, i.e. sec precision
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| 419 | */
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| 420 | if (!NCONF_get_number_e(conf, section, ENV_CLOCK_PRECISION_DIGITS,
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| 421 | &digits))
|
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| 422 | digits = 0;
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| 423 | if (digits < 0 || digits > TS_MAX_CLOCK_PRECISION_DIGITS) {
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| 424 | ts_CONF_invalid(section, ENV_CLOCK_PRECISION_DIGITS);
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| 425 | goto err;
|
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| 426 | }
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| 427 |
|
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| 428 | if (!TS_RESP_CTX_set_clock_precision_digits(ctx, digits))
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| 429 | goto err;
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| 430 |
|
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| 431 | return 1;
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| 432 | err:
|
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| 433 | return ret;
|
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| 434 | }
|
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| 435 |
|
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| 436 | static int ts_CONF_add_flag(CONF *conf, const char *section,
|
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| 437 | const char *field, int flag, TS_RESP_CTX *ctx)
|
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| 438 | {
|
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| 439 | const char *value = NCONF_get_string(conf, section, field);
|
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| 440 |
|
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| 441 | if (value) {
|
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| 442 | if (strcmp(value, ENV_VALUE_YES) == 0)
|
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| 443 | TS_RESP_CTX_add_flags(ctx, flag);
|
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| 444 | else if (strcmp(value, ENV_VALUE_NO) != 0) {
|
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| 445 | ts_CONF_invalid(section, field);
|
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| 446 | return 0;
|
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| 447 | }
|
---|
| 448 | }
|
---|
| 449 |
|
---|
| 450 | return 1;
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | int TS_CONF_set_ordering(CONF *conf, const char *section, TS_RESP_CTX *ctx)
|
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| 454 | {
|
---|
| 455 | return ts_CONF_add_flag(conf, section, ENV_ORDERING, TS_ORDERING, ctx);
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | int TS_CONF_set_tsa_name(CONF *conf, const char *section, TS_RESP_CTX *ctx)
|
---|
| 459 | {
|
---|
| 460 | return ts_CONF_add_flag(conf, section, ENV_TSA_NAME, TS_TSA_NAME, ctx);
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | int TS_CONF_set_ess_cert_id_chain(CONF *conf, const char *section,
|
---|
| 464 | TS_RESP_CTX *ctx)
|
---|
| 465 | {
|
---|
| 466 | return ts_CONF_add_flag(conf, section, ENV_ESS_CERT_ID_CHAIN,
|
---|
| 467 | TS_ESS_CERT_ID_CHAIN, ctx);
|
---|
| 468 | }
|
---|