providers/defltprov.c

   1 /*
   2  * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <string.h>
  11 #include <stdio.h>
  12 #include <openssl/opensslconf.h>
  13 #include <openssl/core.h>
  14 #include <openssl/core_dispatch.h>
  15 #include <openssl/core_names.h>
  16 #include <openssl/params.h>
  17 #include "prov/bio.h"
  18 #include "prov/provider_ctx.h"
  19 #include "prov/providercommon.h"
  20 #include "prov/implementations.h"
  21 #include "prov/provider_util.h"
  22 #include "internal/nelem.h"
  23
  24 /*
  25  * Forward declarations to ensure that interface functions are correctly
  26  * defined.
  27  */
  28 static OSSL_FUNC_provider_gettable_params_fn deflt_gettable_params;
  29 static OSSL_FUNC_provider_get_params_fn deflt_get_params;
  30 static OSSL_FUNC_provider_query_operation_fn deflt_query;
  31
  32 #define ALGC(NAMES, FUNC, CHECK) { { NAMES, "provider=default", FUNC }, CHECK }
  33 #define ALG(NAMES, FUNC) ALGC(NAMES, FUNC, NULL)
  34
  35 /* Functions provided by the core */
  36 static OSSL_FUNC_core_gettable_params_fn *c_gettable_params = NULL;
  37 static OSSL_FUNC_core_get_params_fn *c_get_params = NULL;
  38
  39 /* Parameters we provide to the core */
  40 static const OSSL_PARAM deflt_param_types[] = {
  41     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_NAME, OSSL_PARAM_UTF8_PTR, NULL, 0),
  42     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
  43     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_BUILDINFO, OSSL_PARAM_UTF8_PTR, NULL, 0),
  44     OSSL_PARAM_END
  45 };
  46
  47 static const OSSL_PARAM *deflt_gettable_params(void *provctx)
  48 {
  49     return deflt_param_types;
  50 }
  51
  52 static int deflt_get_params(void *provctx, OSSL_PARAM params[])
  53 {
  54     OSSL_PARAM *p;
  55
  56     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
  57     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Default Provider"))
  58         return 0;
  59     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
  60     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
  61         return 0;
  62     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
  63     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
  64         return 0;
  65     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_STATUS);
  66     if (p != NULL && !OSSL_PARAM_set_uint(p, 1))
  67         return 0;
  68     return 1;
  69 }
  70
  71 /*
  72  * For the algorithm names, we use the following formula for our primary
  73  * names:
  74  *
  75  *     ALGNAME[VERSION?][-SUBNAME[VERSION?]?][-SIZE?][-MODE?]
  76  *
  77  *     VERSION is only present if there are multiple versions of
  78  *     an alg (MD2, MD4, MD5).  It may be omitted if there is only
  79  *     one version (if a subsequent version is released in the future,
  80  *     we can always change the canonical name, and add the old name
  81  *     as an alias).
  82  *
  83  *     SUBNAME may be present where we are combining multiple
  84  *     algorithms together, e.g. MD5-SHA1.
  85  *
  86  *     SIZE is only present if multiple versions of an algorithm exist
  87  *     with different sizes (e.g. AES-128-CBC, AES-256-CBC)
  88  *
  89  *     MODE is only present where applicable.
  90  *
  91  * We add diverse other names where applicable, such as the names that
  92  * NIST uses, or that are used for ASN.1 OBJECT IDENTIFIERs, or names
  93  * we have used historically.
  94  *
  95  * Algorithm names are case insensitive, but we use all caps in our "canonical"
  96  * names for consistency.
  97  */
  98 static const OSSL_ALGORITHM deflt_digests[] = {
  99     /* Our primary name:NIST name[:our older names] */
 100     { "SHA1:SHA-1:SSL3-SHA1", "provider=default", sha1_functions },
 101     { "SHA2-224:SHA-224:SHA224", "provider=default", sha224_functions },
 102     { "SHA2-256:SHA-256:SHA256", "provider=default", sha256_functions },
 103     { "SHA2-384:SHA-384:SHA384", "provider=default", sha384_functions },
 104     { "SHA2-512:SHA-512:SHA512", "provider=default", sha512_functions },
 105     { "SHA2-512/224:SHA-512/224:SHA512-224", "provider=default",
 106       sha512_224_functions },
 107     { "SHA2-512/256:SHA-512/256:SHA512-256", "provider=default",
 108       sha512_256_functions },
 109
 110     /* We agree with NIST here, so one name only */
 111     { "SHA3-224", "provider=default", sha3_224_functions },
 112     { "SHA3-256", "provider=default", sha3_256_functions },
 113     { "SHA3-384", "provider=default", sha3_384_functions },
 114     { "SHA3-512", "provider=default", sha3_512_functions },
 115
 116     /*
 117      * KECCAK-KMAC-128 and KECCAK-KMAC-256 as hashes are mostly useful for
 118      * the KMAC-128 and KMAC-256.
 119      */
 120     { "KECCAK-KMAC-128:KECCAK-KMAC128", "provider=default", keccak_kmac_128_functions },
 121     { "KECCAK-KMAC-256:KECCAK-KMAC256", "provider=default", keccak_kmac_256_functions },
 122
 123     /* Our primary name:NIST name */
 124     { "SHAKE-128:SHAKE128", "provider=default", shake_128_functions },
 125     { "SHAKE-256:SHAKE256", "provider=default", shake_256_functions },
 126
 127 #ifndef OPENSSL_NO_BLAKE2
 128     /*
 129      * https://blake2.net/ doesn't specify size variants,
 130      * but mentions that Bouncy Castle uses the names
 131      * BLAKE2b-160, BLAKE2b-256, BLAKE2b-384, and BLAKE2b-512
 132      * If we assume that "2b" and "2s" are versions, that pattern
 133      * fits with ours.  We also add our historical names.
 134      */
 135     { "BLAKE2S-256:BLAKE2s256", "provider=default", blake2s256_functions },
 136     { "BLAKE2B-512:BLAKE2b512", "provider=default", blake2b512_functions },
 137 #endif /* OPENSSL_NO_BLAKE2 */
 138
 139 #ifndef OPENSSL_NO_SM3
 140     { "SM3", "provider=default", sm3_functions },
 141 #endif /* OPENSSL_NO_SM3 */
 142
 143 #ifndef OPENSSL_NO_MD5
 144     { "MD5:SSL3-MD5", "provider=default", md5_functions },
 145     { "MD5-SHA1", "provider=default", md5_sha1_functions },
 146 #endif /* OPENSSL_NO_MD5 */
 147
 148     { NULL, NULL, NULL }
 149 };
 150
 151 static const OSSL_ALGORITHM_CAPABLE deflt_ciphers[] = {
 152     ALG("NULL", null_functions),
 153     ALG("AES-256-ECB", aes256ecb_functions),
 154     ALG("AES-192-ECB", aes192ecb_functions),
 155     ALG("AES-128-ECB", aes128ecb_functions),
 156     ALG("AES-256-CBC:AES256", aes256cbc_functions),
 157     ALG("AES-192-CBC:AES192", aes192cbc_functions),
 158     ALG("AES-128-CBC:AES128", aes128cbc_functions),
 159     ALG("AES-128-CBC-CTS", aes128cbc_cts_functions),
 160     ALG("AES-192-CBC-CTS", aes192cbc_cts_functions),
 161     ALG("AES-256-CBC-CTS", aes256cbc_cts_functions),
 162     ALG("AES-256-OFB", aes256ofb_functions),
 163     ALG("AES-192-OFB", aes192ofb_functions),
 164     ALG("AES-128-OFB", aes128ofb_functions),
 165     ALG("AES-256-CFB", aes256cfb_functions),
 166     ALG("AES-192-CFB", aes192cfb_functions),
 167     ALG("AES-128-CFB", aes128cfb_functions),
 168     ALG("AES-256-CFB1", aes256cfb1_functions),
 169     ALG("AES-192-CFB1", aes192cfb1_functions),
 170     ALG("AES-128-CFB1", aes128cfb1_functions),
 171     ALG("AES-256-CFB8", aes256cfb8_functions),
 172     ALG("AES-192-CFB8", aes192cfb8_functions),
 173     ALG("AES-128-CFB8", aes128cfb8_functions),
 174     ALG("AES-256-CTR", aes256ctr_functions),
 175     ALG("AES-192-CTR", aes192ctr_functions),
 176     ALG("AES-128-CTR", aes128ctr_functions),
 177     ALG("AES-256-XTS", aes256xts_functions),
 178     ALG("AES-128-XTS", aes128xts_functions),
 179 #ifndef OPENSSL_NO_OCB
 180     ALG("AES-256-OCB", aes256ocb_functions),
 181     ALG("AES-192-OCB", aes192ocb_functions),
 182     ALG("AES-128-OCB", aes128ocb_functions),
 183 #endif /* OPENSSL_NO_OCB */
 184 #ifndef OPENSSL_NO_SIV
 185     ALG("AES-128-SIV", aes128siv_functions),
 186     ALG("AES-192-SIV", aes192siv_functions),
 187     ALG("AES-256-SIV", aes256siv_functions),
 188 #endif /* OPENSSL_NO_SIV */
 189     ALG("AES-256-GCM:id-aes256-GCM", aes256gcm_functions),
 190     ALG("AES-192-GCM:id-aes192-GCM", aes192gcm_functions),
 191     ALG("AES-128-GCM:id-aes128-GCM", aes128gcm_functions),
 192     ALG("AES-256-CCM:id-aes256-CCM", aes256ccm_functions),
 193     ALG("AES-192-CCM:id-aes192-CCM", aes192ccm_functions),
 194     ALG("AES-128-CCM:id-aes128-CCM", aes128ccm_functions),
 195     ALG("AES-256-WRAP:id-aes256-wrap:AES256-WRAP", aes256wrap_functions),
 196     ALG("AES-192-WRAP:id-aes192-wrap:AES192-WRAP", aes192wrap_functions),
 197     ALG("AES-128-WRAP:id-aes128-wrap:AES128-WRAP", aes128wrap_functions),
 198     ALG("AES-256-WRAP-PAD:id-aes256-wrap-pad:AES256-WRAP-PAD",
 199         aes256wrappad_functions),
 200     ALG("AES-192-WRAP-PAD:id-aes192-wrap-pad:AES192-WRAP-PAD",
 201         aes192wrappad_functions),
 202     ALG("AES-128-WRAP-PAD:id-aes128-wrap-pad:AES128-WRAP-PAD",
 203         aes128wrappad_functions),
 204     ALGC("AES-128-CBC-HMAC-SHA1", aes128cbc_hmac_sha1_functions,
 205          cipher_capable_aes_cbc_hmac_sha1),
 206     ALGC("AES-256-CBC-HMAC-SHA1", aes256cbc_hmac_sha1_functions,
 207          cipher_capable_aes_cbc_hmac_sha1),
 208     ALGC("AES-128-CBC-HMAC-SHA256", aes128cbc_hmac_sha256_functions,
 209         cipher_capable_aes_cbc_hmac_sha256),
 210     ALGC("AES-256-CBC-HMAC-SHA256", aes256cbc_hmac_sha256_functions,
 211          cipher_capable_aes_cbc_hmac_sha256),
 212 #ifndef OPENSSL_NO_ARIA
 213     ALG("ARIA-256-GCM", aria256gcm_functions),
 214     ALG("ARIA-192-GCM", aria192gcm_functions),
 215     ALG("ARIA-128-GCM", aria128gcm_functions),
 216     ALG("ARIA-256-CCM", aria256ccm_functions),
 217     ALG("ARIA-192-CCM", aria192ccm_functions),
 218     ALG("ARIA-128-CCM", aria128ccm_functions),
 219     ALG("ARIA-256-ECB", aria256ecb_functions),
 220     ALG("ARIA-192-ECB", aria192ecb_functions),
 221     ALG("ARIA-128-ECB", aria128ecb_functions),
 222     ALG("ARIA-256-CBC:ARIA256", aria256cbc_functions),
 223     ALG("ARIA-192-CBC:ARIA192", aria192cbc_functions),
 224     ALG("ARIA-128-CBC:ARIA128", aria128cbc_functions),
 225     ALG("ARIA-256-OFB", aria256ofb_functions),
 226     ALG("ARIA-192-OFB", aria192ofb_functions),
 227     ALG("ARIA-128-OFB", aria128ofb_functions),
 228     ALG("ARIA-256-CFB", aria256cfb_functions),
 229     ALG("ARIA-192-CFB", aria192cfb_functions),
 230     ALG("ARIA-128-CFB", aria128cfb_functions),
 231     ALG("ARIA-256-CFB1", aria256cfb1_functions),
 232     ALG("ARIA-192-CFB1", aria192cfb1_functions),
 233     ALG("ARIA-128-CFB1", aria128cfb1_functions),
 234     ALG("ARIA-256-CFB8", aria256cfb8_functions),
 235     ALG("ARIA-192-CFB8", aria192cfb8_functions),
 236     ALG("ARIA-128-CFB8", aria128cfb8_functions),
 237     ALG("ARIA-256-CTR", aria256ctr_functions),
 238     ALG("ARIA-192-CTR", aria192ctr_functions),
 239     ALG("ARIA-128-CTR", aria128ctr_functions),
 240 #endif /* OPENSSL_NO_ARIA */
 241 #ifndef OPENSSL_NO_CAMELLIA
 242     ALG("CAMELLIA-256-ECB", camellia256ecb_functions),
 243     ALG("CAMELLIA-192-ECB", camellia192ecb_functions),
 244     ALG("CAMELLIA-128-ECB", camellia128ecb_functions),
 245     ALG("CAMELLIA-256-CBC:CAMELLIA256", camellia256cbc_functions),
 246     ALG("CAMELLIA-192-CBC:CAMELLIA192", camellia192cbc_functions),
 247     ALG("CAMELLIA-128-CBC:CAMELLIA128", camellia128cbc_functions),
 248     ALG("CAMELLIA-256-OFB", camellia256ofb_functions),
 249     ALG("CAMELLIA-192-OFB", camellia192ofb_functions),
 250     ALG("CAMELLIA-128-OFB", camellia128ofb_functions),
 251     ALG("CAMELLIA-256-CFB", camellia256cfb_functions),
 252     ALG("CAMELLIA-192-CFB", camellia192cfb_functions),
 253     ALG("CAMELLIA-128-CFB", camellia128cfb_functions),
 254     ALG("CAMELLIA-256-CFB1", camellia256cfb1_functions),
 255     ALG("CAMELLIA-192-CFB1", camellia192cfb1_functions),
 256     ALG("CAMELLIA-128-CFB1", camellia128cfb1_functions),
 257     ALG("CAMELLIA-256-CFB8", camellia256cfb8_functions),
 258     ALG("CAMELLIA-192-CFB8", camellia192cfb8_functions),
 259     ALG("CAMELLIA-128-CFB8", camellia128cfb8_functions),
 260     ALG("CAMELLIA-256-CTR", camellia256ctr_functions),
 261     ALG("CAMELLIA-192-CTR", camellia192ctr_functions),
 262     ALG("CAMELLIA-128-CTR", camellia128ctr_functions),
 263 #endif /* OPENSSL_NO_CAMELLIA */
 264 #ifndef OPENSSL_NO_DES
 265     ALG("DES-EDE3-ECB:DES-EDE3", tdes_ede3_ecb_functions),
 266     ALG("DES-EDE3-CBC:DES3", tdes_ede3_cbc_functions),
 267     ALG("DES-EDE3-OFB", tdes_ede3_ofb_functions),
 268     ALG("DES-EDE3-CFB", tdes_ede3_cfb_functions),
 269     ALG("DES-EDE3-CFB8", tdes_ede3_cfb8_functions),
 270     ALG("DES-EDE3-CFB1", tdes_ede3_cfb1_functions),
 271     ALG("DES3-WRAP:id-smime-alg-CMS3DESwrap", tdes_wrap_cbc_functions),
 272     ALG("DES-EDE-ECB:DES-EDE", tdes_ede2_ecb_functions),
 273     ALG("DES-EDE-CBC", tdes_ede2_cbc_functions),
 274     ALG("DES-EDE-OFB", tdes_ede2_ofb_functions),
 275     ALG("DES-EDE-CFB", tdes_ede2_cfb_functions),
 276 #endif /* OPENSSL_NO_DES */
 277 #ifndef OPENSSL_NO_SM4
 278     ALG("SM4-ECB", sm4128ecb_functions),
 279     ALG("SM4-CBC:SM4", sm4128cbc_functions),
 280     ALG("SM4-CTR", sm4128ctr_functions),
 281     ALG("SM4-OFB:SM4-OFB128", sm4128ofb128_functions),
 282     ALG("SM4-CFB:SM4-CFB128", sm4128cfb128_functions),
 283 #endif /* OPENSSL_NO_SM4 */
 284 #ifndef OPENSSL_NO_CHACHA
 285     ALG("ChaCha20", chacha20_functions),
 286 # ifndef OPENSSL_NO_POLY1305
 287     ALG("ChaCha20-Poly1305", chacha20_poly1305_functions),
 288 # endif /* OPENSSL_NO_POLY1305 */
 289 #endif /* OPENSSL_NO_CHACHA */
 290     { { NULL, NULL, NULL }, NULL }
 291 };
 292 static OSSL_ALGORITHM exported_ciphers[OSSL_NELEM(deflt_ciphers)];
 293
 294 static const OSSL_ALGORITHM deflt_macs[] = {
 295 #ifndef OPENSSL_NO_BLAKE2
 296     { "BLAKE2BMAC", "provider=default", blake2bmac_functions },
 297     { "BLAKE2SMAC", "provider=default", blake2smac_functions },
 298 #endif
 299 #ifndef OPENSSL_NO_CMAC
 300     { "CMAC", "provider=default", cmac_functions },
 301 #endif
 302     { "GMAC", "provider=default", gmac_functions },
 303     { "HMAC", "provider=default", hmac_functions },
 304     { "KMAC-128:KMAC128", "provider=default", kmac128_functions },
 305     { "KMAC-256:KMAC256", "provider=default", kmac256_functions },
 306 #ifndef OPENSSL_NO_SIPHASH
 307     { "SIPHASH", "provider=default", siphash_functions },
 308 #endif
 309 #ifndef OPENSSL_NO_POLY1305
 310     { "POLY1305", "provider=default", poly1305_functions },
 311 #endif
 312     { NULL, NULL, NULL }
 313 };
 314
 315 static const OSSL_ALGORITHM deflt_kdfs[] = {
 316     { "HKDF", "provider=default", kdf_hkdf_functions },
 317     { "SSKDF", "provider=default", kdf_sskdf_functions },
 318     { "PBKDF2", "provider=default", kdf_pbkdf2_functions },
 319     { "SSHKDF", "provider=default", kdf_sshkdf_functions },
 320     { "X963KDF", "provider=default", kdf_x963_kdf_functions },
 321     { "TLS1-PRF", "provider=default", kdf_tls1_prf_functions },
 322     { "KBKDF", "provider=default", kdf_kbkdf_functions },
 323 #ifndef OPENSSL_NO_CMS
 324     { "X942KDF", "provider=default", kdf_x942_kdf_functions },
 325 #endif
 326 #ifndef OPENSSL_NO_SCRYPT
 327     { "SCRYPT:id-scrypt", "provider=default", kdf_scrypt_functions },
 328 #endif
 329     { "KRB5KDF", "provider=default", kdf_krb5kdf_functions },
 330     { NULL, NULL, NULL }
 331 };
 332
 333 static const OSSL_ALGORITHM deflt_keyexch[] = {
 334 #ifndef OPENSSL_NO_DH
 335     { "DH:dhKeyAgreement", "provider=default", dh_keyexch_functions },
 336 #endif
 337 #ifndef OPENSSL_NO_EC
 338     { "ECDH", "provider=default", ecdh_keyexch_functions },
 339     { "X25519", "provider=default", x25519_keyexch_functions },
 340     { "X448", "provider=default", x448_keyexch_functions },
 341 #endif
 342     { "TLS1-PRF", "provider=default", kdf_tls1_prf_keyexch_functions },
 343     { "HKDF", "provider=default", kdf_hkdf_keyexch_functions },
 344     { NULL, NULL, NULL }
 345 };
 346
 347 static const OSSL_ALGORITHM deflt_rands[] = {
 348     { "CTR-DRBG", "provider=default", drbg_ctr_functions },
 349     { "HASH-DRBG", "provider=default", drbg_hash_functions },
 350     { "HMAC-DRBG", "provider=default", drbg_hmac_functions },
 351     { "TEST-RAND", "provider=default", test_rng_functions },
 352     { NULL, NULL, NULL }
 353 };
 354
 355 static const OSSL_ALGORITHM deflt_signature[] = {
 356 #ifndef OPENSSL_NO_DSA
 357     { "DSA:dsaEncryption", "provider=default", dsa_signature_functions },
 358 #endif
 359     { "RSA:rsaEncryption", "provider=default", rsa_signature_functions },
 360 #ifndef OPENSSL_NO_EC
 361     { "ED25519:Ed25519", "provider=default", ed25519_signature_functions },
 362     { "ED448:Ed448", "provider=default", ed448_signature_functions },
 363     { "ECDSA", "provider=default", ecdsa_signature_functions },
 364 #endif
 365     { NULL, NULL, NULL }
 366 };
 367
 368 static const OSSL_ALGORITHM deflt_asym_cipher[] = {
 369     { "RSA:rsaEncryption", "provider=default", rsa_asym_cipher_functions },
 370     { NULL, NULL, NULL }
 371 };
 372
 373 static const OSSL_ALGORITHM deflt_keymgmt[] = {
 374 #ifndef OPENSSL_NO_DH
 375     { "DH:dhKeyAgreement", "provider=default", dh_keymgmt_functions },
 376 #endif
 377 #ifndef OPENSSL_NO_DSA
 378     { "DSA:dsaEncryption", "provider=default", dsa_keymgmt_functions },
 379 #endif
 380     { "RSA:rsaEncryption", "provider=default", rsa_keymgmt_functions },
 381     { "RSA-PSS:RSASSA-PSS", "provider=default", rsapss_keymgmt_functions },
 382 #ifndef OPENSSL_NO_EC
 383     { "EC:id-ecPublicKey", "provider=default", ec_keymgmt_functions },
 384     { "X25519", "provider=default", x25519_keymgmt_functions },
 385     { "X448", "provider=default", x448_keymgmt_functions },
 386     { "ED25519", "provider=default", ed25519_keymgmt_functions },
 387     { "ED448", "provider=default", ed448_keymgmt_functions },
 388 #endif
 389     { "TLS1-PRF", "provider=default", kdf_keymgmt_functions },
 390     { "HKDF", "provider=default", kdf_keymgmt_functions },
 391     { NULL, NULL, NULL }
 392 };
 393
 394 static const OSSL_ALGORITHM deflt_serializer[] = {
 395 #define SER(name, fips, format, type, func_table)                           \
 396     { name,                                                                 \
 397       "provider=default,fips=" fips ",format=" format ",type=" type,        \
 398       (func_table) }
 399
 400 #include "serializers.inc"
 401     { NULL, NULL, NULL }
 402 };
 403 #undef SER
 404
 405 static const OSSL_ALGORITHM deflt_deserializer[] = {
 406 #define DESER(name, fips, input, func_table)                                \
 407     { name,                                                                 \
 408       "provider=default,fips=" fips ",input=" input,                        \
 409       (func_table) }
 410
 411 #include "deserializers.inc"
 412     { NULL, NULL, NULL }
 413 };
 414 #undef DESER
 415
 416 static const OSSL_ALGORITHM *deflt_query(void *provctx, int operation_id,
 417                                          int *no_cache)
 418 {
 419     *no_cache = 0;
 420     switch (operation_id) {
 421     case OSSL_OP_DIGEST:
 422         return deflt_digests;
 423     case OSSL_OP_CIPHER:
 424         ossl_prov_cache_exported_algorithms(deflt_ciphers, exported_ciphers);
 425         return exported_ciphers;
 426     case OSSL_OP_MAC:
 427         return deflt_macs;
 428     case OSSL_OP_KDF:
 429         return deflt_kdfs;
 430     case OSSL_OP_RAND:
 431         return deflt_rands;
 432     case OSSL_OP_KEYMGMT:
 433         return deflt_keymgmt;
 434     case OSSL_OP_KEYEXCH:
 435         return deflt_keyexch;
 436     case OSSL_OP_SIGNATURE:
 437         return deflt_signature;
 438     case OSSL_OP_ASYM_CIPHER:
 439         return deflt_asym_cipher;
 440     case OSSL_OP_SERIALIZER:
 441         return deflt_serializer;
 442     case OSSL_OP_DESERIALIZER:
 443         return deflt_deserializer;
 444     }
 445     return NULL;
 446 }
 447
 448
 449 static void deflt_teardown(void *provctx)
 450 {
 451     BIO_meth_free(PROV_CTX_get0_core_bio_method(provctx));
 452     PROV_CTX_free(provctx);
 453 }
 454
 455 /* Functions we provide to the core */
 456 static const OSSL_DISPATCH deflt_dispatch_table[] = {
 457     { OSSL_FUNC_PROVIDER_TEARDOWN, (void (*)(void))deflt_teardown },
 458     { OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))deflt_gettable_params },
 459     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))deflt_get_params },
 460     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))deflt_query },
 461     { OSSL_FUNC_PROVIDER_GET_CAPABILITIES, (void (*)(void))provider_get_capabilities },
 462     { 0, NULL }
 463 };
 464
 465 OSSL_provider_init_fn ossl_default_provider_init;
 466
 467 int ossl_default_provider_init(const OSSL_CORE_HANDLE *handle,
 468                                const OSSL_DISPATCH *in,
 469                                const OSSL_DISPATCH **out,
 470                                void **provctx)
 471 {
 472     OSSL_FUNC_core_get_library_context_fn *c_get_libctx = NULL;
 473     BIO_METHOD *corebiometh;
 474
 475     if (!ossl_prov_bio_from_dispatch(in))
 476         return 0;
 477     for (; in->function_id != 0; in++) {
 478         switch (in->function_id) {
 479         case OSSL_FUNC_CORE_GETTABLE_PARAMS:
 480             c_gettable_params = OSSL_FUNC_core_gettable_params(in);
 481             break;
 482         case OSSL_FUNC_CORE_GET_PARAMS:
 483             c_get_params = OSSL_FUNC_core_get_params(in);
 484             break;
 485         case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
 486             c_get_libctx = OSSL_FUNC_core_get_library_context(in);
 487             break;
 488         default:
 489             /* Just ignore anything we don't understand */
 490             break;
 491         }
 492     }
 493
 494     if (c_get_libctx == NULL)
 495         return 0;
 496
 497     /*
 498      * We want to make sure that all calls from this provider that requires
 499      * a library context use the same context as the one used to call our
 500      * functions.  We do that by passing it along in the provider context.
 501      *
 502      * This only works for built-in providers.  Most providers should
 503      * create their own library context.
 504      */
 505     if ((*provctx = PROV_CTX_new()) == NULL
 506             || (corebiometh = bio_prov_init_bio_method()) == NULL) {
 507         PROV_CTX_free(*provctx);
 508         *provctx = NULL;
 509         return 0;
 510     }
 511     PROV_CTX_set0_library_context(*provctx, (OPENSSL_CTX *)c_get_libctx(handle));
 512     PROV_CTX_set0_handle(*provctx, handle);
 513     PROV_CTX_set0_core_bio_method(*provctx, corebiometh);
 514
 515     *out = deflt_dispatch_table;
 516
 517     return 1;
 518 }