openssl/providers/defltprov.c
Richard Levitte 677add3800 PROV SERIALIZER: add support for writing RSA keys
This also adds the missing accessor RSA_get0_pss_params(), so those
parameters can be included in the PKCS#8 data structure without
needing to know the inside of the RSA structure.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10394)
2019-11-29 20:55:16 +01:00

482 lines
20 KiB
C

/*
* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <stdio.h>
#include <openssl/opensslconf.h>
#include <openssl/core.h>
#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include "prov/bio.h"
#include "prov/implementations.h"
/* Functions provided by the core */
static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
static OSSL_core_get_params_fn *c_get_params = NULL;
/* Parameters we provide to the core */
static const OSSL_PARAM deflt_param_types[] = {
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_NAME, OSSL_PARAM_UTF8_PTR, NULL, 0),
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_BUILDINFO, OSSL_PARAM_UTF8_PTR, NULL, 0),
OSSL_PARAM_END
};
static const OSSL_PARAM *deflt_gettable_params(const OSSL_PROVIDER *prov)
{
return deflt_param_types;
}
static int deflt_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
{
OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Default Provider"))
return 0;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
return 0;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
return 0;
return 1;
}
/*
* For the algorithm names, we use the following formula for our primary
* names:
*
* ALGNAME[VERSION?][-SUBNAME[VERSION?]?][-SIZE?][-MODE?]
*
* VERSION is only present if there are multiple versions of
* an alg (MD2, MD4, MD5). It may be omitted if there is only
* one version (if a subsequent version is released in the future,
* we can always change the canonical name, and add the old name
* as an alias).
*
* SUBNAME may be present where we are combining multiple
* algorithms together, e.g. MD5-SHA1.
*
* SIZE is only present if multiple versions of an algorithm exist
* with different sizes (e.g. AES-128-CBC, AES-256-CBC)
*
* MODE is only present where applicable.
*
* We add diverse other names where applicable, such as the names that
* NIST uses, or that are used for ASN.1 OBJECT IDENTIFIERs, or names
* we have used historically.
*
* Algorithm names are case insensitive, but we use all caps in our "canonical"
* names for consistency.
*/
static const OSSL_ALGORITHM deflt_digests[] = {
/* Our primary name:NIST name[:our older names] */
{ "SHA1:SHA-1", "default=yes", sha1_functions },
{ "SHA2-224:SHA-224:SHA224", "default=yes", sha224_functions },
{ "SHA2-256:SHA-256:SHA256", "default=yes", sha256_functions },
{ "SHA2-384:SHA-384:SHA384", "default=yes", sha384_functions },
{ "SHA2-512:SHA-512:SHA512", "default=yes", sha512_functions },
{ "SHA2-512/224:SHA-512/224:SHA512-224", "default=yes",
sha512_224_functions },
{ "SHA2-512/256:SHA-512/256:SHA512-256", "default=yes",
sha512_256_functions },
/* We agree with NIST here, so one name only */
{ "SHA3-224", "default=yes", sha3_224_functions },
{ "SHA3-256", "default=yes", sha3_256_functions },
{ "SHA3-384", "default=yes", sha3_384_functions },
{ "SHA3-512", "default=yes", sha3_512_functions },
/*
* KECCAK-KMAC-128 and KECCAK-KMAC-256 as hashes are mostly useful for
* the KMAC-128 and KMAC-256.
*/
{ "KECCAK-KMAC-128:KECCAK-KMAC128", "default=yes", keccak_kmac_128_functions },
{ "KECCAK-KMAC-256:KECCAK-KMAC256", "default=yes", keccak_kmac_256_functions },
/* Our primary name:NIST name */
{ "SHAKE-128:SHAKE128", "default=yes", shake_128_functions },
{ "SHAKE-256:SHAKE256", "default=yes", shake_256_functions },
#ifndef OPENSSL_NO_BLAKE2
/*
* https://blake2.net/ doesn't specify size variants,
* but mentions that Bouncy Castle uses the names
* BLAKE2b-160, BLAKE2b-256, BLAKE2b-384, and BLAKE2b-512
* If we assume that "2b" and "2s" are versions, that pattern
* fits with ours. We also add our historical names.
*/
{ "BLAKE2S-256:BLAKE2s256", "default=yes", blake2s256_functions },
{ "BLAKE2B-512:BLAKE2b512", "default=yes", blake2b512_functions },
#endif /* OPENSSL_NO_BLAKE2 */
#ifndef OPENSSL_NO_SM3
{ "SM3", "default=yes", sm3_functions },
#endif /* OPENSSL_NO_SM3 */
#ifndef OPENSSL_NO_MD5
{ "MD5", "default=yes", md5_functions },
{ "MD5-SHA1", "default=yes", md5_sha1_functions },
#endif /* OPENSSL_NO_MD5 */
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_ciphers[] = {
{ "AES-256-ECB", "default=yes", aes256ecb_functions },
{ "AES-192-ECB", "default=yes", aes192ecb_functions },
{ "AES-128-ECB", "default=yes", aes128ecb_functions },
{ "AES-256-CBC", "default=yes", aes256cbc_functions },
{ "AES-192-CBC", "default=yes", aes192cbc_functions },
{ "AES-128-CBC", "default=yes", aes128cbc_functions },
{ "AES-256-OFB", "default=yes", aes256ofb_functions },
{ "AES-192-OFB", "default=yes", aes192ofb_functions },
{ "AES-128-OFB", "default=yes", aes128ofb_functions },
{ "AES-256-CFB", "default=yes", aes256cfb_functions },
{ "AES-192-CFB", "default=yes", aes192cfb_functions },
{ "AES-128-CFB", "default=yes", aes128cfb_functions },
{ "AES-256-CFB1", "default=yes", aes256cfb1_functions },
{ "AES-192-CFB1", "default=yes", aes192cfb1_functions },
{ "AES-128-CFB1", "default=yes", aes128cfb1_functions },
{ "AES-256-CFB8", "default=yes", aes256cfb8_functions },
{ "AES-192-CFB8", "default=yes", aes192cfb8_functions },
{ "AES-128-CFB8", "default=yes", aes128cfb8_functions },
{ "AES-256-CTR", "default=yes", aes256ctr_functions },
{ "AES-192-CTR", "default=yes", aes192ctr_functions },
{ "AES-128-CTR", "default=yes", aes128ctr_functions },
{ "AES-256-XTS", "default=yes", aes256xts_functions },
{ "AES-128-XTS", "default=yes", aes128xts_functions },
#ifndef OPENSSL_NO_OCB
{ "AES-256-OCB", "default=yes", aes256ocb_functions },
{ "AES-192-OCB", "default=yes", aes192ocb_functions },
{ "AES-128-OCB", "default=yes", aes128ocb_functions },
#endif /* OPENSSL_NO_OCB */
#ifndef OPENSSL_NO_SIV
{ "AES-128-SIV", "default=yes", aes128siv_functions },
{ "AES-192-SIV", "default=yes", aes192siv_functions },
{ "AES-256-SIV", "default=yes", aes256siv_functions },
#endif /* OPENSSL_NO_SIV */
{ "AES-256-GCM:id-aes256-GCM", "default=yes", aes256gcm_functions },
{ "AES-192-GCM:id-aes192-GCM", "default=yes", aes192gcm_functions },
{ "AES-128-GCM:id-aes128-GCM", "default=yes", aes128gcm_functions },
{ "AES-256-CCM:id-aes256-CCM", "default=yes", aes256ccm_functions },
{ "AES-192-CCM:id-aes192-CCM", "default=yes", aes192ccm_functions },
{ "AES-128-CCM:id-aes128-CCM", "default=yes", aes128ccm_functions },
{ "AES-256-WRAP:id-aes256-wrap:AES256-WRAP", "default=yes",
aes256wrap_functions },
{ "AES-192-WRAP:id-aes192-wrap:AES192-WRAP", "default=yes",
aes192wrap_functions },
{ "AES-128-WRAP:id-aes128-wrap:AES128-WRAP", "default=yes",
aes128wrap_functions },
{ "AES-256-WRAP-PAD:id-aes256-wrap-pad:AES256-WRAP-PAD", "default=yes",
aes256wrappad_functions },
{ "AES-192-WRAP-PAD:id-aes192-wrap-pad:AES192-WRAP-PAD", "default=yes",
aes192wrappad_functions },
{ "AES-128-WRAP-PAD:id-aes128-wrap-pad:AES128-WRAP-PAD", "default=yes",
aes128wrappad_functions },
#ifndef OPENSSL_NO_ARIA
{ "ARIA-256-GCM", "default=yes", aria256gcm_functions },
{ "ARIA-192-GCM", "default=yes", aria192gcm_functions },
{ "ARIA-128-GCM", "default=yes", aria128gcm_functions },
{ "ARIA-256-CCM", "default=yes", aria256ccm_functions },
{ "ARIA-192-CCM", "default=yes", aria192ccm_functions },
{ "ARIA-128-CCM", "default=yes", aria128ccm_functions },
{ "ARIA-256-ECB", "default=yes", aria256ecb_functions },
{ "ARIA-192-ECB", "default=yes", aria192ecb_functions },
{ "ARIA-128-ECB", "default=yes", aria128ecb_functions },
{ "ARIA-256-CBC:ARIA256", "default=yes", aria256cbc_functions },
{ "ARIA-192-CBC:ARIA192", "default=yes", aria192cbc_functions },
{ "ARIA-128-CBC:ARIA128", "default=yes", aria128cbc_functions },
{ "ARIA-256-OFB", "default=yes", aria256ofb_functions },
{ "ARIA-192-OFB", "default=yes", aria192ofb_functions },
{ "ARIA-128-OFB", "default=yes", aria128ofb_functions },
{ "ARIA-256-CFB", "default=yes", aria256cfb_functions },
{ "ARIA-192-CFB", "default=yes", aria192cfb_functions },
{ "ARIA-128-CFB", "default=yes", aria128cfb_functions },
{ "ARIA-256-CFB1", "default=yes", aria256cfb1_functions },
{ "ARIA-192-CFB1", "default=yes", aria192cfb1_functions },
{ "ARIA-128-CFB1", "default=yes", aria128cfb1_functions },
{ "ARIA-256-CFB8", "default=yes", aria256cfb8_functions },
{ "ARIA-192-CFB8", "default=yes", aria192cfb8_functions },
{ "ARIA-128-CFB8", "default=yes", aria128cfb8_functions },
{ "ARIA-256-CTR", "default=yes", aria256ctr_functions },
{ "ARIA-192-CTR", "default=yes", aria192ctr_functions },
{ "ARIA-128-CTR", "default=yes", aria128ctr_functions },
#endif /* OPENSSL_NO_ARIA */
#ifndef OPENSSL_NO_CAMELLIA
{ "CAMELLIA-256-ECB", "default=yes", camellia256ecb_functions },
{ "CAMELLIA-192-ECB", "default=yes", camellia192ecb_functions },
{ "CAMELLIA-128-ECB", "default=yes", camellia128ecb_functions },
{ "CAMELLIA-256-CBC:CAMELLIA256", "default=yes", camellia256cbc_functions },
{ "CAMELLIA-192-CBC:CAMELLIA192", "default=yes", camellia192cbc_functions },
{ "CAMELLIA-128-CBC:CAMELLIA128", "default=yes", camellia128cbc_functions },
{ "CAMELLIA-256-OFB", "default=yes", camellia256ofb_functions },
{ "CAMELLIA-192-OFB", "default=yes", camellia192ofb_functions },
{ "CAMELLIA-128-OFB", "default=yes", camellia128ofb_functions },
{ "CAMELLIA-256-CFB", "default=yes", camellia256cfb_functions },
{ "CAMELLIA-192-CFB", "default=yes", camellia192cfb_functions },
{ "CAMELLIA-128-CFB", "default=yes", camellia128cfb_functions },
{ "CAMELLIA-256-CFB1", "default=yes", camellia256cfb1_functions },
{ "CAMELLIA-192-CFB1", "default=yes", camellia192cfb1_functions },
{ "CAMELLIA-128-CFB1", "default=yes", camellia128cfb1_functions },
{ "CAMELLIA-256-CFB8", "default=yes", camellia256cfb8_functions },
{ "CAMELLIA-192-CFB8", "default=yes", camellia192cfb8_functions },
{ "CAMELLIA-128-CFB8", "default=yes", camellia128cfb8_functions },
{ "CAMELLIA-256-CTR", "default=yes", camellia256ctr_functions },
{ "CAMELLIA-192-CTR", "default=yes", camellia192ctr_functions },
{ "CAMELLIA-128-CTR", "default=yes", camellia128ctr_functions },
#endif /* OPENSSL_NO_CAMELLIA */
#ifndef OPENSSL_NO_DES
{ "DES-EDE3-ECB:DES-EDE3", "default=yes", tdes_ede3_ecb_functions },
{ "DES-EDE3-CBC:DES3", "default=yes", tdes_ede3_cbc_functions },
{ "DES-EDE3-OFB", "default=yes", tdes_ede3_ofb_functions },
{ "DES-EDE3-CFB", "default=yes", tdes_ede3_cfb_functions },
{ "DES-EDE3-CFB8", "default=yes", tdes_ede3_cfb8_functions },
{ "DES-EDE3-CFB1", "default=yes", tdes_ede3_cfb1_functions },
{ "DES-EDE-ECB:DES-EDE", "default=yes", tdes_ede2_ecb_functions },
{ "DES-EDE-CBC", "default=yes", tdes_ede2_cbc_functions },
{ "DES-EDE-OFB", "default=yes", tdes_ede2_ofb_functions },
{ "DES-EDE-CFB", "default=yes", tdes_ede2_cfb_functions },
{ "DESX-CBC:DESX", "default=yes", tdes_desx_cbc_functions },
{ "DES3-WRAP:id-smime-alg-CMS3DESwrap", "default=yes", tdes_wrap_cbc_functions },
{ "DES-ECB", "default=yes", des_ecb_functions },
{ "DES-CBC:DES", "default=yes", des_cbc_functions },
{ "DES-OFB", "default=yes", des_ofb64_functions },
{ "DES-CFB", "default=yes", des_cfb64_functions },
{ "DES-CFB1", "default=yes", des_cfb1_functions },
{ "DES-CFB8", "default=yes", des_cfb8_functions },
#endif /* OPENSSL_NO_DES */
#ifndef OPENSSL_NO_BF
{ "BF-ECB", "default=yes", blowfish128ecb_functions },
{ "BF-CBC:BF:BLOWFISH", "default=yes", blowfish128cbc_functions },
{ "BF-OFB", "default=yes", blowfish64ofb64_functions },
{ "BF-CFB", "default=yes", blowfish64cfb64_functions },
#endif /* OPENSSL_NO_BF */
#ifndef OPENSSL_NO_IDEA
{ "IDEA-ECB", "default=yes", idea128ecb_functions },
{ "IDEA-CBC:IDEA", "default=yes", idea128cbc_functions },
{ "IDEA-OFB:IDEA-OFB64", "default=yes", idea128ofb64_functions },
{ "IDEA-CFB:IDEA-CFB64", "default=yes", idea128cfb64_functions },
#endif /* OPENSSL_NO_IDEA */
#ifndef OPENSSL_NO_CAST
{ "CAST5-ECB", "default=yes", cast5128ecb_functions },
{ "CAST5-CBC:CAST-CBC:CAST", "default=yes", cast5128cbc_functions },
{ "CAST5-OFB", "default=yes", cast564ofb64_functions },
{ "CAST5-CFB", "default=yes", cast564cfb64_functions },
#endif /* OPENSSL_NO_CAST */
#ifndef OPENSSL_NO_SEED
{ "SEED-ECB", "default=yes", seed128ecb_functions },
{ "SEED-CBC:SEED", "default=yes", seed128cbc_functions },
{ "SEED-OFB:SEED-OFB128", "default=yes", seed128ofb128_functions },
{ "SEED-CFB:SEED-CFB128", "default=yes", seed128cfb128_functions },
#endif /* OPENSSL_NO_SEED */
#ifndef OPENSSL_NO_SM4
{ "SM4-ECB", "default=yes", sm4128ecb_functions },
{ "SM4-CBC:SM4", "default=yes", sm4128cbc_functions },
{ "SM4-CTR", "default=yes", sm4128ctr_functions },
{ "SM4-OFB:SM4-OFB128", "default=yes", sm4128ofb128_functions },
{ "SM4-CFB:SM4-CFB128", "default=yes", sm4128cfb128_functions },
#endif /* OPENSSL_NO_SM4 */
#ifndef OPENSSL_NO_RC4
{ "RC4", "default=yes", rc4128_functions },
{ "RC4-40", "default=yes", rc440_functions },
# ifndef OPENSSL_NO_MD5
{ "RC4-HMAC-MD5", "default=yes", rc4_hmac_md5_functions },
# endif /* OPENSSL_NO_MD5 */
#endif /* OPENSSL_NO_RC4 */
#ifndef OPENSSL_NO_RC5
{ "RC5-ECB", "default=yes", rc5128ecb_functions },
{ "RC5-CBC", "default=yes", rc5128cbc_functions },
{ "RC5-OFB", "default=yes", rc5128ofb64_functions },
{ "RC5-CFB", "default=yes", rc5128cfb64_functions },
#endif /* OPENSSL_NO_RC5 */
#ifndef OPENSSL_NO_RC2
{ "RC2-ECB", "default=yes", rc2128ecb_functions },
{ "RC2-CBC", "default=yes", rc2128cbc_functions },
{ "RC2-40-CBC", "default=yes", rc240cbc_functions },
{ "RC2-64-CBC", "default=yes", rc264cbc_functions },
{ "RC2-CFB", "default=yes", rc2128cfb128_functions },
{ "RC2-OFB", "default=yes", rc2128ofb128_functions },
#endif /* OPENSSL_NO_RC2 */
#ifndef OPENSSL_NO_CHACHA
{ "ChaCha20", "default=yes", chacha20_functions },
# ifndef OPENSSL_NO_POLY1305
{ "ChaCha20-Poly1305", "default=yes", chacha20_poly1305_functions },
# endif /* OPENSSL_NO_POLY1305 */
#endif /* OPENSSL_NO_CHACHA */
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_macs[] = {
#ifndef OPENSSL_NO_BLAKE2
{ "BLAKE2BMAC", "default=yes", blake2bmac_functions },
{ "BLAKE2SMAC", "default=yes", blake2smac_functions },
#endif
#ifndef OPENSSL_NO_CMAC
{ "CMAC", "default=yes", cmac_functions },
#endif
{ "GMAC", "default=yes", gmac_functions },
{ "HMAC", "default=yes", hmac_functions },
{ "KMAC-128:KMAC128", "default=yes", kmac128_functions },
{ "KMAC-256:KMAC256", "default=yes", kmac256_functions },
#ifndef OPENSSL_NO_SIPHASH
{ "SIPHASH", "default=yes", siphash_functions },
#endif
#ifndef OPENSSL_NO_POLY1305
{ "POLY1305", "default=yes", poly1305_functions },
#endif
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_kdfs[] = {
{ "HKDF", "default=yes", kdf_hkdf_functions },
{ "SSKDF", "default=yes", kdf_sskdf_functions },
{ "PBKDF2", "default=yes", kdf_pbkdf2_functions },
{ "SSHKDF", "default=yes", kdf_sshkdf_functions },
{ "X963KDF", "default=yes", kdf_x963_kdf_functions },
{ "TLS1-PRF", "default=yes", kdf_tls1_prf_functions },
{ "KBKDF", "default=yes", kdf_kbkdf_functions },
#ifndef OPENSSL_NO_CMS
{ "X942KDF", "default=yes", kdf_x942_kdf_functions },
#endif
#ifndef OPENSSL_NO_SCRYPT
{ "SCRYPT:id-scrypt", "default=yes", kdf_scrypt_functions },
#endif
{ "KRB5KDF", "default=yes", kdf_krb5kdf_functions },
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_keyexch[] = {
#ifndef OPENSSL_NO_DH
{ "DH:dhKeyAgreement", "default=yes", dh_keyexch_functions },
#endif
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_signature[] = {
#ifndef OPENSSL_NO_DSA
{ "DSA:dsaEncryption", "default=yes", dsa_signature_functions },
#endif
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_asym_cipher[] = {
{ "RSA:rsaEncryption", "default=yes", rsa_asym_cipher_functions },
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_keymgmt[] = {
#ifndef OPENSSL_NO_DH
{ "DH", "default=yes", dh_keymgmt_functions },
#endif
#ifndef OPENSSL_NO_DSA
{ "DSA", "default=yes", dsa_keymgmt_functions },
#endif
{ "RSA", "default=yes", rsa_keymgmt_functions },
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_serializer[] = {
{ "RSA", "default=yes,format=text,type=private",
rsa_priv_text_serializer_functions },
{ "RSA", "default=yes,format=text,type=public",
rsa_pub_text_serializer_functions },
{ "RSA", "default=yes,format=der,type=private",
rsa_priv_der_serializer_functions },
{ "RSA", "default=yes,format=der,type=public",
rsa_pub_der_serializer_functions },
{ "RSA", "default=yes,format=pem,type=private",
rsa_priv_pem_serializer_functions },
{ "RSA", "default=yes,format=pem,type=public",
rsa_pub_pem_serializer_functions },
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM *deflt_query(OSSL_PROVIDER *prov,
int operation_id,
int *no_cache)
{
*no_cache = 0;
switch (operation_id) {
case OSSL_OP_DIGEST:
return deflt_digests;
case OSSL_OP_CIPHER:
return deflt_ciphers;
case OSSL_OP_MAC:
return deflt_macs;
case OSSL_OP_KDF:
return deflt_kdfs;
case OSSL_OP_KEYMGMT:
return deflt_keymgmt;
case OSSL_OP_KEYEXCH:
return deflt_keyexch;
case OSSL_OP_SIGNATURE:
return deflt_signature;
case OSSL_OP_ASYM_CIPHER:
return deflt_asym_cipher;
case OSSL_OP_SERIALIZER:
return deflt_serializer;
}
return NULL;
}
/* Functions we provide to the core */
static const OSSL_DISPATCH deflt_dispatch_table[] = {
{ OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))deflt_gettable_params },
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))deflt_get_params },
{ OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))deflt_query },
{ 0, NULL }
};
OSSL_provider_init_fn ossl_default_provider_init;
int ossl_default_provider_init(const OSSL_PROVIDER *provider,
const OSSL_DISPATCH *in,
const OSSL_DISPATCH **out,
void **provctx)
{
OSSL_core_get_library_context_fn *c_get_libctx = NULL;
if (!ossl_prov_bio_from_dispatch(in))
return 0;
for (; in->function_id != 0; in++) {
switch (in->function_id) {
case OSSL_FUNC_CORE_GETTABLE_PARAMS:
c_gettable_params = OSSL_get_core_gettable_params(in);
break;
case OSSL_FUNC_CORE_GET_PARAMS:
c_get_params = OSSL_get_core_get_params(in);
break;
case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
c_get_libctx = OSSL_get_core_get_library_context(in);
break;
default:
/* Just ignore anything we don't understand */
break;
}
}
if (c_get_libctx == NULL)
return 0;
*out = deflt_dispatch_table;
/*
* 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);
return 1;
}