| /* |
| * Copyright 2011-2021 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 <assert.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <openssl/sha.h> |
| #include <openssl/crypto.h> |
| #include <openssl/err.h> |
| #include <openssl/rand.h> |
| #include <openssl/core_dispatch.h> |
| #include <openssl/proverr.h> |
| #include "internal/thread_once.h" |
| #include "prov/providercommon.h" |
| #include "prov/provider_ctx.h" |
| #include "prov/provider_util.h" |
| #include "prov/implementations.h" |
| #include "drbg_local.h" |
| |
| static OSSL_FUNC_rand_newctx_fn drbg_hash_new_wrapper; |
| static OSSL_FUNC_rand_freectx_fn drbg_hash_free; |
| static OSSL_FUNC_rand_instantiate_fn drbg_hash_instantiate_wrapper; |
| static OSSL_FUNC_rand_uninstantiate_fn drbg_hash_uninstantiate_wrapper; |
| static OSSL_FUNC_rand_generate_fn drbg_hash_generate_wrapper; |
| static OSSL_FUNC_rand_reseed_fn drbg_hash_reseed_wrapper; |
| static OSSL_FUNC_rand_settable_ctx_params_fn drbg_hash_settable_ctx_params; |
| static OSSL_FUNC_rand_set_ctx_params_fn drbg_hash_set_ctx_params; |
| static OSSL_FUNC_rand_gettable_ctx_params_fn drbg_hash_gettable_ctx_params; |
| static OSSL_FUNC_rand_get_ctx_params_fn drbg_hash_get_ctx_params; |
| static OSSL_FUNC_rand_verify_zeroization_fn drbg_hash_verify_zeroization; |
| |
| /* 888 bits from SP800-90Ar1 10.1 table 2 */ |
| #define HASH_PRNG_MAX_SEEDLEN (888/8) |
| |
| /* 440 bits from SP800-90Ar1 10.1 table 2 */ |
| #define HASH_PRNG_SMALL_SEEDLEN (440/8) |
| |
| /* Determine what seedlen to use based on the block length */ |
| #define MAX_BLOCKLEN_USING_SMALL_SEEDLEN (256/8) |
| #define INBYTE_IGNORE ((unsigned char)0xFF) |
| |
| typedef struct rand_drbg_hash_st { |
| PROV_DIGEST digest; |
| EVP_MD_CTX *ctx; |
| size_t blocklen; |
| unsigned char V[HASH_PRNG_MAX_SEEDLEN]; |
| unsigned char C[HASH_PRNG_MAX_SEEDLEN]; |
| /* Temporary value storage: should always exceed max digest length */ |
| unsigned char vtmp[HASH_PRNG_MAX_SEEDLEN]; |
| } PROV_DRBG_HASH; |
| |
| /* |
| * SP800-90Ar1 10.3.1 Derivation function using a Hash Function (Hash_df). |
| * The input string used is composed of: |
| * inbyte - An optional leading byte (ignore if equal to INBYTE_IGNORE) |
| * in - input string 1 (A Non NULL value). |
| * in2 - optional input string (Can be NULL). |
| * in3 - optional input string (Can be NULL). |
| * These are concatenated as part of the DigestUpdate process. |
| */ |
| static int hash_df(PROV_DRBG *drbg, unsigned char *out, |
| const unsigned char inbyte, |
| const unsigned char *in, size_t inlen, |
| const unsigned char *in2, size_t in2len, |
| const unsigned char *in3, size_t in3len) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| EVP_MD_CTX *ctx = hash->ctx; |
| unsigned char *vtmp = hash->vtmp; |
| /* tmp = counter || num_bits_returned || [inbyte] */ |
| unsigned char tmp[1 + 4 + 1]; |
| int tmp_sz = 0; |
| size_t outlen = drbg->seedlen; |
| size_t num_bits_returned = outlen * 8; |
| /* |
| * No need to check outlen size here, as the standard only ever needs |
| * seedlen bytes which is always less than the maximum permitted. |
| */ |
| |
| /* (Step 3) counter = 1 (tmp[0] is the 8 bit counter) */ |
| tmp[tmp_sz++] = 1; |
| /* tmp[1..4] is the fixed 32 bit no_of_bits_to_return */ |
| tmp[tmp_sz++] = (unsigned char)((num_bits_returned >> 24) & 0xff); |
| tmp[tmp_sz++] = (unsigned char)((num_bits_returned >> 16) & 0xff); |
| tmp[tmp_sz++] = (unsigned char)((num_bits_returned >> 8) & 0xff); |
| tmp[tmp_sz++] = (unsigned char)(num_bits_returned & 0xff); |
| /* Tack the additional input byte onto the end of tmp if it exists */ |
| if (inbyte != INBYTE_IGNORE) |
| tmp[tmp_sz++] = inbyte; |
| |
| /* (Step 4) */ |
| for (;;) { |
| /* |
| * (Step 4.1) out = out || Hash(tmp || in || [in2] || [in3]) |
| * (where tmp = counter || num_bits_returned || [inbyte]) |
| */ |
| if (!(EVP_DigestInit_ex(ctx, ossl_prov_digest_md(&hash->digest), NULL) |
| && EVP_DigestUpdate(ctx, tmp, tmp_sz) |
| && EVP_DigestUpdate(ctx, in, inlen) |
| && (in2 == NULL || EVP_DigestUpdate(ctx, in2, in2len)) |
| && (in3 == NULL || EVP_DigestUpdate(ctx, in3, in3len)))) |
| return 0; |
| |
| if (outlen < hash->blocklen) { |
| if (!EVP_DigestFinal(ctx, vtmp, NULL)) |
| return 0; |
| memcpy(out, vtmp, outlen); |
| OPENSSL_cleanse(vtmp, hash->blocklen); |
| break; |
| } else if (!EVP_DigestFinal(ctx, out, NULL)) { |
| return 0; |
| } |
| |
| outlen -= hash->blocklen; |
| if (outlen == 0) |
| break; |
| /* (Step 4.2) counter++ */ |
| tmp[0]++; |
| out += hash->blocklen; |
| } |
| return 1; |
| } |
| |
| /* Helper function that just passes 2 input parameters to hash_df() */ |
| static int hash_df1(PROV_DRBG *drbg, unsigned char *out, |
| const unsigned char in_byte, |
| const unsigned char *in1, size_t in1len) |
| { |
| return hash_df(drbg, out, in_byte, in1, in1len, NULL, 0, NULL, 0); |
| } |
| |
| /* |
| * Add 2 byte buffers together. The first elements in each buffer are the top |
| * most bytes. The result is stored in the dst buffer. |
| * The final carry is ignored i.e: dst = (dst + in) mod (2^seedlen_bits). |
| * where dst size is drbg->seedlen, and inlen <= drbg->seedlen. |
| */ |
| static int add_bytes(PROV_DRBG *drbg, unsigned char *dst, |
| unsigned char *in, size_t inlen) |
| { |
| size_t i; |
| int result; |
| const unsigned char *add; |
| unsigned char carry = 0, *d; |
| |
| assert(drbg->seedlen >= 1 && inlen >= 1 && inlen <= drbg->seedlen); |
| |
| d = &dst[drbg->seedlen - 1]; |
| add = &in[inlen - 1]; |
| |
| for (i = inlen; i > 0; i--, d--, add--) { |
| result = *d + *add + carry; |
| carry = (unsigned char)(result >> 8); |
| *d = (unsigned char)(result & 0xff); |
| } |
| |
| if (carry != 0) { |
| /* Add the carry to the top of the dst if inlen is not the same size */ |
| for (i = drbg->seedlen - inlen; i > 0; --i, d--) { |
| *d += 1; /* Carry can only be 1 */ |
| if (*d != 0) /* exit if carry doesnt propagate to the next byte */ |
| break; |
| } |
| } |
| return 1; |
| } |
| |
| /* V = (V + Hash(inbyte || V || [additional_input]) mod (2^seedlen) */ |
| static int add_hash_to_v(PROV_DRBG *drbg, unsigned char inbyte, |
| const unsigned char *adin, size_t adinlen) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| EVP_MD_CTX *ctx = hash->ctx; |
| |
| return EVP_DigestInit_ex(ctx, ossl_prov_digest_md(&hash->digest), NULL) |
| && EVP_DigestUpdate(ctx, &inbyte, 1) |
| && EVP_DigestUpdate(ctx, hash->V, drbg->seedlen) |
| && (adin == NULL || EVP_DigestUpdate(ctx, adin, adinlen)) |
| && EVP_DigestFinal(ctx, hash->vtmp, NULL) |
| && add_bytes(drbg, hash->V, hash->vtmp, hash->blocklen); |
| } |
| |
| /* |
| * The Hashgen() as listed in SP800-90Ar1 10.1.1.4 Hash_DRBG_Generate_Process. |
| * |
| * drbg contains the current value of V. |
| * outlen is the requested number of bytes. |
| * out is a buffer to return the generated bits. |
| * |
| * The algorithm to generate the bits is: |
| * data = V |
| * w = NULL |
| * for (i = 1 to m) { |
| * W = W || Hash(data) |
| * data = (data + 1) mod (2^seedlen) |
| * } |
| * out = Leftmost(W, outlen) |
| * |
| * Returns zero if an error occurs otherwise it returns 1. |
| */ |
| static int hash_gen(PROV_DRBG *drbg, unsigned char *out, size_t outlen) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| unsigned char one = 1; |
| |
| if (outlen == 0) |
| return 1; |
| memcpy(hash->vtmp, hash->V, drbg->seedlen); |
| for (;;) { |
| if (!EVP_DigestInit_ex(hash->ctx, ossl_prov_digest_md(&hash->digest), |
| NULL) |
| || !EVP_DigestUpdate(hash->ctx, hash->vtmp, drbg->seedlen)) |
| return 0; |
| |
| if (outlen < hash->blocklen) { |
| if (!EVP_DigestFinal(hash->ctx, hash->vtmp, NULL)) |
| return 0; |
| memcpy(out, hash->vtmp, outlen); |
| return 1; |
| } else { |
| if (!EVP_DigestFinal(hash->ctx, out, NULL)) |
| return 0; |
| outlen -= hash->blocklen; |
| if (outlen == 0) |
| break; |
| out += hash->blocklen; |
| } |
| add_bytes(drbg, hash->vtmp, &one, 1); |
| } |
| return 1; |
| } |
| |
| /* |
| * SP800-90Ar1 10.1.1.2 Hash_DRBG_Instantiate_Process: |
| * |
| * ent is entropy input obtained from a randomness source of length ent_len. |
| * nonce is a string of bytes of length nonce_len. |
| * pstr is a personalization string received from an application. May be NULL. |
| * |
| * Returns zero if an error occurs otherwise it returns 1. |
| */ |
| static int drbg_hash_instantiate(PROV_DRBG *drbg, |
| const unsigned char *ent, size_t ent_len, |
| const unsigned char *nonce, size_t nonce_len, |
| const unsigned char *pstr, size_t pstr_len) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| |
| EVP_MD_CTX_free(hash->ctx); |
| hash->ctx = EVP_MD_CTX_new(); |
| |
| /* (Step 1-3) V = Hash_df(entropy||nonce||pers, seedlen) */ |
| return hash->ctx != NULL |
| && hash_df(drbg, hash->V, INBYTE_IGNORE, |
| ent, ent_len, nonce, nonce_len, pstr, pstr_len) |
| /* (Step 4) C = Hash_df(0x00||V, seedlen) */ |
| && hash_df1(drbg, hash->C, 0x00, hash->V, drbg->seedlen); |
| } |
| |
| static int drbg_hash_instantiate_wrapper(void *vdrbg, unsigned int strength, |
| int prediction_resistance, |
| const unsigned char *pstr, |
| size_t pstr_len, |
| const OSSL_PARAM params[]) |
| { |
| PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; |
| |
| if (!ossl_prov_is_running() || !drbg_hash_set_ctx_params(drbg, params)) |
| return 0; |
| return ossl_prov_drbg_instantiate(drbg, strength, prediction_resistance, |
| pstr, pstr_len); |
| } |
| |
| /* |
| * SP800-90Ar1 10.1.1.3 Hash_DRBG_Reseed_Process: |
| * |
| * ent is entropy input bytes obtained from a randomness source. |
| * addin is additional input received from an application. May be NULL. |
| * |
| * Returns zero if an error occurs otherwise it returns 1. |
| */ |
| static int drbg_hash_reseed(PROV_DRBG *drbg, |
| const unsigned char *ent, size_t ent_len, |
| const unsigned char *adin, size_t adin_len) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| |
| /* (Step 1-2) V = Hash_df(0x01 || V || entropy_input || additional_input) */ |
| /* V about to be updated so use C as output instead */ |
| if (!hash_df(drbg, hash->C, 0x01, hash->V, drbg->seedlen, ent, ent_len, |
| adin, adin_len)) |
| return 0; |
| memcpy(hash->V, hash->C, drbg->seedlen); |
| /* (Step 4) C = Hash_df(0x00||V, seedlen) */ |
| return hash_df1(drbg, hash->C, 0x00, hash->V, drbg->seedlen); |
| } |
| |
| static int drbg_hash_reseed_wrapper(void *vdrbg, int prediction_resistance, |
| const unsigned char *ent, size_t ent_len, |
| const unsigned char *adin, size_t adin_len) |
| { |
| PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; |
| |
| return ossl_prov_drbg_reseed(drbg, prediction_resistance, ent, ent_len, |
| adin, adin_len); |
| } |
| |
| /* |
| * SP800-90Ar1 10.1.1.4 Hash_DRBG_Generate_Process: |
| * |
| * Generates pseudo random bytes using the drbg. |
| * out is a buffer to fill with outlen bytes of pseudo random data. |
| * addin is additional input received from an application. May be NULL. |
| * |
| * Returns zero if an error occurs otherwise it returns 1. |
| */ |
| static int drbg_hash_generate(PROV_DRBG *drbg, |
| unsigned char *out, size_t outlen, |
| const unsigned char *adin, size_t adin_len) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| unsigned char counter[4]; |
| int reseed_counter = drbg->generate_counter; |
| |
| counter[0] = (unsigned char)((reseed_counter >> 24) & 0xff); |
| counter[1] = (unsigned char)((reseed_counter >> 16) & 0xff); |
| counter[2] = (unsigned char)((reseed_counter >> 8) & 0xff); |
| counter[3] = (unsigned char)(reseed_counter & 0xff); |
| |
| return hash->ctx != NULL |
| && (adin == NULL |
| /* (Step 2) if adin != NULL then V = V + Hash(0x02||V||adin) */ |
| || adin_len == 0 |
| || add_hash_to_v(drbg, 0x02, adin, adin_len)) |
| /* (Step 3) Hashgen(outlen, V) */ |
| && hash_gen(drbg, out, outlen) |
| /* (Step 4/5) H = V = (V + Hash(0x03||V) mod (2^seedlen_bits) */ |
| && add_hash_to_v(drbg, 0x03, NULL, 0) |
| /* (Step 5) V = (V + H + C + reseed_counter) mod (2^seedlen_bits) */ |
| /* V = (V + C) mod (2^seedlen_bits) */ |
| && add_bytes(drbg, hash->V, hash->C, drbg->seedlen) |
| /* V = (V + reseed_counter) mod (2^seedlen_bits) */ |
| && add_bytes(drbg, hash->V, counter, 4); |
| } |
| |
| static int drbg_hash_generate_wrapper |
| (void *vdrbg, unsigned char *out, size_t outlen, unsigned int strength, |
| int prediction_resistance, const unsigned char *adin, size_t adin_len) |
| { |
| PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; |
| |
| return ossl_prov_drbg_generate(drbg, out, outlen, strength, |
| prediction_resistance, adin, adin_len); |
| } |
| |
| static int drbg_hash_uninstantiate(PROV_DRBG *drbg) |
| { |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| |
| OPENSSL_cleanse(hash->V, sizeof(hash->V)); |
| OPENSSL_cleanse(hash->C, sizeof(hash->C)); |
| OPENSSL_cleanse(hash->vtmp, sizeof(hash->vtmp)); |
| return ossl_prov_drbg_uninstantiate(drbg); |
| } |
| |
| static int drbg_hash_uninstantiate_wrapper(void *vdrbg) |
| { |
| return drbg_hash_uninstantiate((PROV_DRBG *)vdrbg); |
| } |
| |
| static int drbg_hash_verify_zeroization(void *vdrbg) |
| { |
| PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| |
| PROV_DRBG_VERYIFY_ZEROIZATION(hash->V); |
| PROV_DRBG_VERYIFY_ZEROIZATION(hash->C); |
| PROV_DRBG_VERYIFY_ZEROIZATION(hash->vtmp); |
| return 1; |
| } |
| |
| static int drbg_hash_new(PROV_DRBG *ctx) |
| { |
| PROV_DRBG_HASH *hash; |
| |
| hash = OPENSSL_secure_zalloc(sizeof(*hash)); |
| if (hash == NULL) { |
| ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| |
| ctx->data = hash; |
| ctx->seedlen = HASH_PRNG_MAX_SEEDLEN; |
| ctx->max_entropylen = DRBG_MAX_LENGTH; |
| ctx->max_noncelen = DRBG_MAX_LENGTH; |
| ctx->max_perslen = DRBG_MAX_LENGTH; |
| ctx->max_adinlen = DRBG_MAX_LENGTH; |
| |
| /* Maximum number of bits per request = 2^19 = 2^16 bytes */ |
| ctx->max_request = 1 << 16; |
| return 1; |
| } |
| |
| static void *drbg_hash_new_wrapper(void *provctx, void *parent, |
| const OSSL_DISPATCH *parent_dispatch) |
| { |
| return ossl_rand_drbg_new(provctx, parent, parent_dispatch, &drbg_hash_new, |
| &drbg_hash_instantiate, &drbg_hash_uninstantiate, |
| &drbg_hash_reseed, &drbg_hash_generate); |
| } |
| |
| static void drbg_hash_free(void *vdrbg) |
| { |
| PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; |
| PROV_DRBG_HASH *hash; |
| |
| if (drbg != NULL && (hash = (PROV_DRBG_HASH *)drbg->data) != NULL) { |
| EVP_MD_CTX_free(hash->ctx); |
| ossl_prov_digest_reset(&hash->digest); |
| OPENSSL_secure_clear_free(hash, sizeof(*hash)); |
| } |
| ossl_rand_drbg_free(drbg); |
| } |
| |
| static int drbg_hash_get_ctx_params(void *vdrbg, OSSL_PARAM params[]) |
| { |
| PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; |
| const EVP_MD *md; |
| OSSL_PARAM *p; |
| |
| p = OSSL_PARAM_locate(params, OSSL_DRBG_PARAM_DIGEST); |
| if (p != NULL) { |
| md = ossl_prov_digest_md(&hash->digest); |
| if (md == NULL || !OSSL_PARAM_set_utf8_string(p, EVP_MD_get0_name(md))) |
| return 0; |
| } |
| |
| return ossl_drbg_get_ctx_params(drbg, params); |
| } |
| |
| static const OSSL_PARAM *drbg_hash_gettable_ctx_params(ossl_unused void *vctx, |
| ossl_unused void *p_ctx) |
| { |
| static const OSSL_PARAM known_gettable_ctx_params[] = { |
| OSSL_PARAM_utf8_string(OSSL_DRBG_PARAM_DIGEST, NULL, 0), |
| OSSL_PARAM_DRBG_GETTABLE_CTX_COMMON, |
| OSSL_PARAM_END |
| }; |
| return known_gettable_ctx_params; |
| } |
| |
| static int drbg_hash_set_ctx_params(void *vctx, const OSSL_PARAM params[]) |
| { |
| PROV_DRBG *ctx = (PROV_DRBG *)vctx; |
| PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)ctx->data; |
| OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(ctx->provctx); |
| const EVP_MD *md; |
| |
| if (!ossl_prov_digest_load_from_params(&hash->digest, params, libctx)) |
| return 0; |
| |
| md = ossl_prov_digest_md(&hash->digest); |
| if (md != NULL) { |
| if ((EVP_MD_get_flags(md) & EVP_MD_FLAG_XOF) != 0) { |
| ERR_raise(ERR_LIB_PROV, PROV_R_XOF_DIGESTS_NOT_ALLOWED); |
| return 0; |
| } |
| |
| /* These are taken from SP 800-90 10.1 Table 2 */ |
| hash->blocklen = EVP_MD_get_size(md); |
| /* See SP800-57 Part1 Rev4 5.6.1 Table 3 */ |
| ctx->strength = 64 * (hash->blocklen >> 3); |
| if (ctx->strength > 256) |
| ctx->strength = 256; |
| if (hash->blocklen > MAX_BLOCKLEN_USING_SMALL_SEEDLEN) |
| ctx->seedlen = HASH_PRNG_MAX_SEEDLEN; |
| else |
| ctx->seedlen = HASH_PRNG_SMALL_SEEDLEN; |
| |
| ctx->min_entropylen = ctx->strength / 8; |
| ctx->min_noncelen = ctx->min_entropylen / 2; |
| } |
| |
| return ossl_drbg_set_ctx_params(ctx, params); |
| } |
| |
| static const OSSL_PARAM *drbg_hash_settable_ctx_params(ossl_unused void *vctx, |
| ossl_unused void *p_ctx) |
| { |
| static const OSSL_PARAM known_settable_ctx_params[] = { |
| OSSL_PARAM_utf8_string(OSSL_DRBG_PARAM_PROPERTIES, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_DRBG_PARAM_DIGEST, NULL, 0), |
| OSSL_PARAM_DRBG_SETTABLE_CTX_COMMON, |
| OSSL_PARAM_END |
| }; |
| return known_settable_ctx_params; |
| } |
| |
| const OSSL_DISPATCH ossl_drbg_hash_functions[] = { |
| { OSSL_FUNC_RAND_NEWCTX, (void(*)(void))drbg_hash_new_wrapper }, |
| { OSSL_FUNC_RAND_FREECTX, (void(*)(void))drbg_hash_free }, |
| { OSSL_FUNC_RAND_INSTANTIATE, |
| (void(*)(void))drbg_hash_instantiate_wrapper }, |
| { OSSL_FUNC_RAND_UNINSTANTIATE, |
| (void(*)(void))drbg_hash_uninstantiate_wrapper }, |
| { OSSL_FUNC_RAND_GENERATE, (void(*)(void))drbg_hash_generate_wrapper }, |
| { OSSL_FUNC_RAND_RESEED, (void(*)(void))drbg_hash_reseed_wrapper }, |
| { OSSL_FUNC_RAND_ENABLE_LOCKING, (void(*)(void))ossl_drbg_enable_locking }, |
| { OSSL_FUNC_RAND_LOCK, (void(*)(void))ossl_drbg_lock }, |
| { OSSL_FUNC_RAND_UNLOCK, (void(*)(void))ossl_drbg_unlock }, |
| { OSSL_FUNC_RAND_SETTABLE_CTX_PARAMS, |
| (void(*)(void))drbg_hash_settable_ctx_params }, |
| { OSSL_FUNC_RAND_SET_CTX_PARAMS, (void(*)(void))drbg_hash_set_ctx_params }, |
| { OSSL_FUNC_RAND_GETTABLE_CTX_PARAMS, |
| (void(*)(void))drbg_hash_gettable_ctx_params }, |
| { OSSL_FUNC_RAND_GET_CTX_PARAMS, (void(*)(void))drbg_hash_get_ctx_params }, |
| { OSSL_FUNC_RAND_VERIFY_ZEROIZATION, |
| (void(*)(void))drbg_hash_verify_zeroization }, |
| { OSSL_FUNC_RAND_GET_SEED, (void(*)(void))ossl_drbg_get_seed }, |
| { OSSL_FUNC_RAND_CLEAR_SEED, (void(*)(void))ossl_drbg_clear_seed }, |
| { 0, NULL } |
| }; |