2019-03-13 20:02:55 +08:00
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/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (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 <stdio.h>
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2019-05-07 18:40:25 +08:00
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#include <openssl/opensslconf.h>
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2019-03-13 20:02:55 +08:00
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#include <openssl/core.h>
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#include <openssl/core_numbers.h>
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#include <openssl/core_names.h>
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#include <openssl/params.h>
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2019-04-03 23:39:34 +08:00
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#include "internal/provider_algs.h"
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2019-03-13 20:02:55 +08:00
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/* Functions provided by the core */
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2019-08-15 02:17:39 +08:00
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static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
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2019-03-13 20:02:55 +08:00
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static OSSL_core_get_params_fn *c_get_params = NULL;
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/* Parameters we provide to the core */
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2019-07-11 18:19:33 +08:00
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static const OSSL_PARAM deflt_param_types[] = {
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OSSL_PARAM_DEFN(OSSL_PROV_PARAM_NAME, OSSL_PARAM_UTF8_PTR, NULL, 0),
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OSSL_PARAM_DEFN(OSSL_PROV_PARAM_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
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OSSL_PARAM_DEFN(OSSL_PROV_PARAM_BUILDINFO, OSSL_PARAM_UTF8_PTR, NULL, 0),
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OSSL_PARAM_END
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2019-03-13 20:02:55 +08:00
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};
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2019-08-15 02:17:39 +08:00
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static const OSSL_PARAM *deflt_gettable_params(const OSSL_PROVIDER *prov)
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2019-03-13 20:02:55 +08:00
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{
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return deflt_param_types;
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}
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2019-06-24 12:43:55 +08:00
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static int deflt_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
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2019-03-13 20:02:55 +08:00
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{
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2019-06-24 12:43:55 +08:00
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OSSL_PARAM *p;
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2019-03-13 20:02:55 +08:00
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p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
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if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Default Provider"))
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return 0;
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p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
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if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
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return 0;
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p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
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if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
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return 0;
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return 1;
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}
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2019-03-14 01:26:17 +08:00
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static const OSSL_ALGORITHM deflt_digests[] = {
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2019-04-11 18:27:59 +08:00
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{ "SHA1", "default=yes", sha1_functions },
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{ "SHA224", "default=yes", sha224_functions },
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2019-03-14 01:26:17 +08:00
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{ "SHA256", "default=yes", sha256_functions },
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2019-04-11 18:27:59 +08:00
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{ "SHA384", "default=yes", sha384_functions },
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{ "SHA512", "default=yes", sha512_functions },
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{ "SHA512-224", "default=yes", sha512_224_functions },
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{ "SHA512-256", "default=yes", sha512_256_functions },
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{ "SHA3-224", "default=yes", sha3_224_functions },
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{ "SHA3-256", "default=yes", sha3_256_functions },
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{ "SHA3-384", "default=yes", sha3_384_functions },
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{ "SHA3-512", "default=yes", sha3_512_functions },
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2019-06-02 14:46:35 +08:00
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/*
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2019-08-13 16:20:05 +08:00
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* KECCAK_KMAC128 and KECCAK_KMAC256 as hashes are mostly useful for
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* the KMAC128 and KMAC256.
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2019-06-02 14:46:35 +08:00
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*/
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2019-08-13 16:20:05 +08:00
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{ "KECCAK_KMAC128", "default=yes", keccak_kmac_128_functions },
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{ "KECCAK_KMAC256", "default=yes", keccak_kmac_256_functions },
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2019-04-11 18:27:59 +08:00
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{ "SHAKE128", "default=yes", shake_128_functions },
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{ "SHAKE256", "default=yes", shake_256_functions },
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#ifndef OPENSSL_NO_BLAKE2
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{ "BLAKE2s256", "default=yes", blake2s256_functions },
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{ "BLAKE2b512", "default=yes", blake2b512_functions },
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#endif /* OPENSSL_NO_BLAKE2 */
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#ifndef OPENSSL_NO_SM3
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{ "SM3", "default=yes", sm3_functions },
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#endif /* OPENSSL_NO_SM3 */
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#ifndef OPENSSL_NO_MD5
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{ "MD5", "default=yes", md5_functions },
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{ "MD5-SHA1", "default=yes", md5_sha1_functions },
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#endif /* OPENSSL_NO_MD5 */
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2019-03-14 01:26:17 +08:00
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{ NULL, NULL, NULL }
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};
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2019-04-03 22:34:08 +08:00
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static const OSSL_ALGORITHM deflt_ciphers[] = {
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{ "AES-256-ECB", "default=yes", aes256ecb_functions },
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2019-04-03 23:53:22 +08:00
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{ "AES-192-ECB", "default=yes", aes192ecb_functions },
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{ "AES-128-ECB", "default=yes", aes128ecb_functions },
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2019-04-04 01:01:21 +08:00
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{ "AES-256-CBC", "default=yes", aes256cbc_functions },
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{ "AES-192-CBC", "default=yes", aes192cbc_functions },
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{ "AES-128-CBC", "default=yes", aes128cbc_functions },
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2019-04-08 23:55:34 +08:00
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{ "AES-256-OFB", "default=yes", aes256ofb_functions },
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{ "AES-192-OFB", "default=yes", aes192ofb_functions },
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{ "AES-128-OFB", "default=yes", aes128ofb_functions },
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2019-04-09 00:13:01 +08:00
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{ "AES-256-CFB", "default=yes", aes256cfb_functions },
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{ "AES-192-CFB", "default=yes", aes192cfb_functions },
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{ "AES-128-CFB", "default=yes", aes128cfb_functions },
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{ "AES-256-CFB1", "default=yes", aes256cfb1_functions },
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{ "AES-192-CFB1", "default=yes", aes192cfb1_functions },
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{ "AES-128-CFB1", "default=yes", aes128cfb1_functions },
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{ "AES-256-CFB8", "default=yes", aes256cfb8_functions },
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{ "AES-192-CFB8", "default=yes", aes192cfb8_functions },
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{ "AES-128-CFB8", "default=yes", aes128cfb8_functions },
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2019-04-09 00:19:59 +08:00
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{ "AES-256-CTR", "default=yes", aes256ctr_functions },
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{ "AES-192-CTR", "default=yes", aes192ctr_functions },
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{ "AES-128-CTR", "default=yes", aes128ctr_functions },
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2019-09-14 07:27:49 +08:00
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{ "AES-256-XTS", "default=yes", aes256xts_functions },
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{ "AES-128-XTS", "default=yes", aes128xts_functions },
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2019-09-19 18:10:25 +08:00
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#ifndef OPENSSL_NO_OCB
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{ "AES-256-OCB", "default=yes", aes256ocb_functions },
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{ "AES-192-OCB", "default=yes", aes192ocb_functions },
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{ "AES-128-OCB", "default=yes", aes128ocb_functions },
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#endif /* OPENSSL_NO_OCB */
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2019-08-20 06:54:41 +08:00
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/* TODO(3.0) Add aliases when they are supported */
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2019-07-31 19:55:16 +08:00
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{ "id-aes256-GCM", "default=yes", aes256gcm_functions },
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{ "id-aes192-GCM", "default=yes", aes192gcm_functions },
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{ "id-aes128-GCM", "default=yes", aes128gcm_functions },
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2019-08-20 06:54:41 +08:00
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{ "id-aes256-CCM", "default=yes", aes256ccm_functions },
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{ "id-aes192-CCM", "default=yes", aes192ccm_functions },
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{ "id-aes128-CCM", "default=yes", aes128ccm_functions },
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2019-07-10 09:42:03 +08:00
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{ "id-aes256-wrap", "default=yes", aes256wrap_functions },
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{ "id-aes192-wrap", "default=yes", aes192wrap_functions },
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{ "id-aes128-wrap", "default=yes", aes128wrap_functions },
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{ "id-aes256-wrap-pad", "default=yes", aes256wrappad_functions },
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{ "id-aes192-wrap-pad", "default=yes", aes192wrappad_functions },
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{ "id-aes128-wrap-pad", "default=yes", aes128wrappad_functions },
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2019-07-31 19:55:16 +08:00
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#ifndef OPENSSL_NO_ARIA
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{ "ARIA-256-GCM", "default=yes", aria256gcm_functions },
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{ "ARIA-192-GCM", "default=yes", aria192gcm_functions },
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{ "ARIA-128-GCM", "default=yes", aria128gcm_functions },
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2019-08-20 06:54:41 +08:00
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{ "ARIA-256-CCM", "default=yes", aria256ccm_functions },
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{ "ARIA-192-CCM", "default=yes", aria192ccm_functions },
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{ "ARIA-128-CCM", "default=yes", aria128ccm_functions },
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2019-08-22 09:42:54 +08:00
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{ "ARIA-256-ECB", "default=yes", aria256ecb_functions },
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{ "ARIA-192-ECB", "default=yes", aria192ecb_functions },
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{ "ARIA-128-ECB", "default=yes", aria128ecb_functions },
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{ "ARIA-256-CBC", "default=yes", aria256cbc_functions },
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{ "ARIA-192-CBC", "default=yes", aria192cbc_functions },
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{ "ARIA-128-CBC", "default=yes", aria128cbc_functions },
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{ "ARIA-256-OFB", "default=yes", aria256ofb_functions },
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{ "ARIA-192-OFB", "default=yes", aria192ofb_functions },
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{ "ARIA-128-OFB", "default=yes", aria128ofb_functions },
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{ "ARIA-256-CFB", "default=yes", aria256cfb_functions },
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{ "ARIA-192-CFB", "default=yes", aria192cfb_functions },
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{ "ARIA-128-CFB", "default=yes", aria128cfb_functions },
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{ "ARIA-256-CFB1", "default=yes", aria256cfb1_functions },
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{ "ARIA-192-CFB1", "default=yes", aria192cfb1_functions },
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{ "ARIA-128-CFB1", "default=yes", aria128cfb1_functions },
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{ "ARIA-256-CFB8", "default=yes", aria256cfb8_functions },
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{ "ARIA-192-CFB8", "default=yes", aria192cfb8_functions },
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{ "ARIA-128-CFB8", "default=yes", aria128cfb8_functions },
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{ "ARIA-256-CTR", "default=yes", aria256ctr_functions },
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{ "ARIA-192-CTR", "default=yes", aria192ctr_functions },
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{ "ARIA-128-CTR", "default=yes", aria128ctr_functions },
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2019-07-31 19:55:16 +08:00
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#endif /* OPENSSL_NO_ARIA */
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2019-08-22 09:42:54 +08:00
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#ifndef OPENSSL_NO_CAMELLIA
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{ "CAMELLIA-256-ECB", "default=yes", camellia256ecb_functions },
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{ "CAMELLIA-192-ECB", "default=yes", camellia192ecb_functions },
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{ "CAMELLIA-128-ECB", "default=yes", camellia128ecb_functions },
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{ "CAMELLIA-256-CBC", "default=yes", camellia256cbc_functions },
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{ "CAMELLIA-192-CBC", "default=yes", camellia192cbc_functions },
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{ "CAMELLIA-128-CBC", "default=yes", camellia128cbc_functions },
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{ "CAMELLIA-256-OFB", "default=yes", camellia256ofb_functions },
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{ "CAMELLIA-192-OFB", "default=yes", camellia192ofb_functions },
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{ "CAMELLIA-128-OFB", "default=yes", camellia128ofb_functions },
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{ "CAMELLIA-256-CFB", "default=yes", camellia256cfb_functions },
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{ "CAMELLIA-192-CFB", "default=yes", camellia192cfb_functions },
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{ "CAMELLIA-128-CFB", "default=yes", camellia128cfb_functions },
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{ "CAMELLIA-256-CFB1", "default=yes", camellia256cfb1_functions },
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{ "CAMELLIA-192-CFB1", "default=yes", camellia192cfb1_functions },
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{ "CAMELLIA-128-CFB1", "default=yes", camellia128cfb1_functions },
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{ "CAMELLIA-256-CFB8", "default=yes", camellia256cfb8_functions },
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{ "CAMELLIA-192-CFB8", "default=yes", camellia192cfb8_functions },
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{ "CAMELLIA-128-CFB8", "default=yes", camellia128cfb8_functions },
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{ "CAMELLIA-256-CTR", "default=yes", camellia256ctr_functions },
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{ "CAMELLIA-192-CTR", "default=yes", camellia192ctr_functions },
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{ "CAMELLIA-128-CTR", "default=yes", camellia128ctr_functions },
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#endif /* OPENSSL_NO_CAMELLIA */
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2019-08-28 23:00:01 +08:00
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#ifndef OPENSSL_NO_DES
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2019-08-26 15:05:08 +08:00
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{ "DES-EDE3", "default=yes", tdes_ede3_ecb_functions },
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{ "DES-EDE3-CBC", "default=yes", tdes_ede3_cbc_functions },
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{ "DES-EDE3-OFB", "default=yes", tdes_ede3_ofb_functions },
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{ "DES-EDE3-CFB", "default=yes", tdes_ede3_cfb_functions },
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{ "DES-EDE3-CFB8", "default=yes", tdes_ede3_cfb8_functions },
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{ "DES-EDE3-CFB1", "default=yes", tdes_ede3_cfb1_functions },
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{ "DES-EDE", "default=yes", tdes_ede2_ecb_functions },
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{ "DES-EDE-CBC", "default=yes", tdes_ede2_cbc_functions },
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{ "DES-EDE-OFB", "default=yes", tdes_ede2_ofb_functions },
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{ "DES-EDE-CFB", "default=yes", tdes_ede2_cfb_functions },
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{ "DESX-CBC", "default=yes", tdes_desx_cbc_functions },
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{ "id-smime-alg-CMS3DESwrap", "default=yes", tdes_wrap_cbc_functions },
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2019-08-28 23:00:01 +08:00
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#endif /* OPENSSL_NO_DES */
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2019-09-15 18:06:28 +08:00
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#ifndef OPENSSL_NO_BF
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{ "BF-ECB", "default=yes", blowfish128ecb_functions },
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{ "BF-CBC", "default=yes", blowfish128cbc_functions },
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{ "BF-OFB", "default=yes", blowfish64ofb64_functions },
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{ "BF-CFB", "default=yes", blowfish64cfb64_functions },
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#endif /* OPENSSL_NO_BF */
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2019-09-18 13:57:08 +08:00
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#ifndef OPENSSL_NO_IDEA
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{ "IDEA-ECB", "default=yes", idea128ecb_functions },
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{ "IDEA-CBC", "default=yes", idea128cbc_functions },
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{ "IDEA-OFB", "default=yes", idea128ofb64_functions },
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{ "IDEA-CFB", "default=yes", idea128cfb64_functions },
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#endif /* OPENSSL_NO_IDEA */
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2019-09-18 16:55:11 +08:00
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#ifndef OPENSSL_NO_CAST
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{ "CAST5-ECB", "default=yes", cast5128ecb_functions },
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{ "CAST5-CBC", "default=yes", cast5128cbc_functions },
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{ "CAST5-OFB", "default=yes", cast564ofb64_functions },
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{ "CAST5-CFB", "default=yes", cast564cfb64_functions },
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#endif /* OPENSSL_NO_CAST */
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2019-09-18 20:13:59 +08:00
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#ifndef OPENSSL_NO_SEED
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{ "SEED-ECB", "default=yes", seed128ecb_functions },
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{ "SEED-CBC", "default=yes", seed128cbc_functions },
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{ "SEED-OFB", "default=yes", seed128ofb128_functions },
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{ "SEED-CFB", "default=yes", seed128cfb128_functions },
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#endif /* OPENSSL_NO_SEED */
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2019-09-19 13:38:51 +08:00
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#ifndef OPENSSL_NO_SM4
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{ "SM4-ECB", "default=yes", sm4128ecb_functions },
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{ "SM4-CBC", "default=yes", sm4128cbc_functions },
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{ "SM4-CTR", "default=yes", sm4128ctr_functions },
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{ "SM4-OFB", "default=yes", sm4128ofb128_functions },
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{ "SM4-CFB", "default=yes", sm4128cfb128_functions },
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#endif /* OPENSSL_NO_SM4 */
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2019-04-03 22:34:08 +08:00
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{ NULL, NULL, NULL }
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};
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2019-05-07 18:40:25 +08:00
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static const OSSL_ALGORITHM deflt_macs[] = {
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#ifndef OPENSSL_NO_BLAKE2
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{ "BLAKE2BMAC", "default=yes", blake2bmac_functions },
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{ "BLAKE2SMAC", "default=yes", blake2smac_functions },
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2019-06-01 17:18:15 +08:00
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#endif
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#ifndef OPENSSL_NO_CMAC
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{ "CMAC", "default=yes", cmac_functions },
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2019-05-07 18:40:25 +08:00
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#endif
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2019-06-01 20:05:45 +08:00
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{ "GMAC", "default=yes", gmac_functions },
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2019-06-02 00:36:10 +08:00
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{ "HMAC", "default=yes", hmac_functions },
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2019-06-02 14:46:35 +08:00
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{ "KMAC128", "default=yes", kmac128_functions },
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{ "KMAC256", "default=yes", kmac256_functions },
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2019-06-02 14:51:58 +08:00
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#ifndef OPENSSL_NO_SIPHASH
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{ "SipHash", "default=yes", siphash_functions },
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2019-06-02 15:33:28 +08:00
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#endif
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#ifndef OPENSSL_NO_POLY1305
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{ "Poly1305", "default=yes", poly1305_functions },
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2019-06-02 14:51:58 +08:00
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#endif
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2019-05-07 18:40:25 +08:00
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{ NULL, NULL, NULL }
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};
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2019-08-21 11:09:10 +08:00
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static const OSSL_ALGORITHM deflt_kdfs[] = {
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2019-09-09 09:42:00 +08:00
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{ OSSL_KDF_NAME_HKDF, "default=yes", kdf_hkdf_functions },
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{ OSSL_KDF_NAME_SSKDF, "default=yes", kdf_sskdf_functions },
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{ OSSL_KDF_NAME_PBKDF2, "default=yes", kdf_pbkdf2_functions },
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{ OSSL_KDF_NAME_SSHKDF, "default=yes", kdf_sshkdf_functions },
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{ OSSL_KDF_NAME_X963KDF, "default=yes", kdf_x963_kdf_functions },
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{ OSSL_KDF_NAME_TLS1_PRF, "default=yes", kdf_tls1_prf_functions },
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2019-08-21 11:09:10 +08:00
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#ifndef OPENSSL_NO_CMS
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2019-09-09 09:42:00 +08:00
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{ OSSL_KDF_NAME_X942KDF, "default=yes", kdf_x942_kdf_functions },
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2019-08-21 11:09:10 +08:00
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#endif
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#ifndef OPENSSL_NO_SCRYPT
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2019-09-09 09:42:00 +08:00
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{ OSSL_KDF_NAME_SCRYPT, "default=yes", kdf_scrypt_functions },
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2019-08-21 11:09:10 +08:00
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#endif
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{ NULL, NULL, NULL }
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};
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2019-06-27 19:36:30 +08:00
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static const OSSL_ALGORITHM deflt_keyexch[] = {
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2019-07-17 18:40:41 +08:00
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#ifndef OPENSSL_NO_DH
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2019-07-07 16:56:46 +08:00
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{ "dhKeyAgreement", "default=yes", dh_keyexch_functions },
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#endif
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{ NULL, NULL, NULL }
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};
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2019-08-30 20:33:37 +08:00
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static const OSSL_ALGORITHM deflt_signature[] = {
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#ifndef OPENSSL_NO_DSA
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{ "DSA", "default=yes", dsa_signature_functions },
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#endif
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{ NULL, NULL, NULL }
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};
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|
2019-07-07 16:56:46 +08:00
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static const OSSL_ALGORITHM deflt_keymgmt[] = {
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|
#ifndef OPENSSL_NO_DH
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{ "dhKeyAgreement", "default=yes", dh_keymgmt_functions },
|
2019-08-30 20:33:37 +08:00
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#endif
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#ifndef OPENSSL_NO_DSA
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{ "DSA", "default=yes", dsa_keymgmt_functions },
|
2019-07-17 18:40:41 +08:00
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#endif
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2019-06-27 19:36:30 +08:00
|
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{ NULL, NULL, NULL }
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};
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|
2019-03-14 01:26:17 +08:00
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|
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static const OSSL_ALGORITHM *deflt_query(OSSL_PROVIDER *prov,
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|
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int operation_id,
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|
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int *no_cache)
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|
|
|
{
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|
*no_cache = 0;
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|
|
switch (operation_id) {
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|
|
case OSSL_OP_DIGEST:
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|
|
|
return deflt_digests;
|
2019-04-03 22:34:08 +08:00
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|
|
case OSSL_OP_CIPHER:
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|
|
return deflt_ciphers;
|
2019-05-07 18:40:25 +08:00
|
|
|
case OSSL_OP_MAC:
|
|
|
|
return deflt_macs;
|
2019-08-21 11:09:10 +08:00
|
|
|
case OSSL_OP_KDF:
|
|
|
|
return deflt_kdfs;
|
2019-07-07 16:56:46 +08:00
|
|
|
case OSSL_OP_KEYMGMT:
|
|
|
|
return deflt_keymgmt;
|
2019-06-27 19:36:30 +08:00
|
|
|
case OSSL_OP_KEYEXCH:
|
|
|
|
return deflt_keyexch;
|
2019-08-30 20:33:37 +08:00
|
|
|
case OSSL_OP_SIGNATURE:
|
|
|
|
return deflt_signature;
|
2019-03-14 01:26:17 +08:00
|
|
|
}
|
|
|
|
return NULL;
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|
|
|
}
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|
|
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|
2019-03-13 20:02:55 +08:00
|
|
|
/* Functions we provide to the core */
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|
|
static const OSSL_DISPATCH deflt_dispatch_table[] = {
|
2019-08-15 02:17:39 +08:00
|
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{ OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))deflt_gettable_params },
|
2019-03-13 20:02:55 +08:00
|
|
|
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))deflt_get_params },
|
2019-03-14 01:26:17 +08:00
|
|
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{ OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))deflt_query },
|
2019-03-13 20:02:55 +08:00
|
|
|
{ 0, NULL }
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|
|
|
};
|
|
|
|
|
|
|
|
OSSL_provider_init_fn ossl_default_provider_init;
|
|
|
|
|
|
|
|
int ossl_default_provider_init(const OSSL_PROVIDER *provider,
|
|
|
|
const OSSL_DISPATCH *in,
|
2019-04-30 19:41:51 +08:00
|
|
|
const OSSL_DISPATCH **out,
|
|
|
|
void **provctx)
|
2019-03-13 20:02:55 +08:00
|
|
|
{
|
2019-06-14 17:41:32 +08:00
|
|
|
OSSL_core_get_library_context_fn *c_get_libctx = NULL;
|
|
|
|
|
2019-03-13 20:02:55 +08:00
|
|
|
for (; in->function_id != 0; in++) {
|
|
|
|
switch (in->function_id) {
|
2019-08-15 02:17:39 +08:00
|
|
|
case OSSL_FUNC_CORE_GETTABLE_PARAMS:
|
|
|
|
c_gettable_params = OSSL_get_core_gettable_params(in);
|
2019-03-13 20:02:55 +08:00
|
|
|
break;
|
|
|
|
case OSSL_FUNC_CORE_GET_PARAMS:
|
|
|
|
c_get_params = OSSL_get_core_get_params(in);
|
|
|
|
break;
|
2019-06-14 17:41:32 +08:00
|
|
|
case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
|
|
|
|
c_get_libctx = OSSL_get_core_get_library_context(in);
|
|
|
|
break;
|
2019-03-13 20:02:55 +08:00
|
|
|
default:
|
|
|
|
/* Just ignore anything we don't understand */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-06-14 17:41:32 +08:00
|
|
|
if (c_get_libctx == NULL)
|
|
|
|
return 0;
|
|
|
|
|
2019-03-13 20:02:55 +08:00
|
|
|
*out = deflt_dispatch_table;
|
2019-06-14 17:41:32 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We want to make sure that all calls from this provider that requires
|
|
|
|
* a library context use the same context as the one used to call our
|
|
|
|
* functions. We do that by passing it along as the provider context.
|
|
|
|
*/
|
|
|
|
*provctx = c_get_libctx(provider);
|
2019-03-13 20:02:55 +08:00
|
|
|
return 1;
|
|
|
|
}
|