diff options
Diffstat (limited to 'crypto/openssl/providers/implementations/rands/drbg_hash.c')
| -rw-r--r-- | crypto/openssl/providers/implementations/rands/drbg_hash.c | 655 |
1 files changed, 655 insertions, 0 deletions
diff --git a/crypto/openssl/providers/implementations/rands/drbg_hash.c b/crypto/openssl/providers/implementations/rands/drbg_hash.c new file mode 100644 index 000000000000..8bb831ae3572 --- /dev/null +++ b/crypto/openssl/providers/implementations/rands/drbg_hash.c @@ -0,0 +1,655 @@ +/* + * Copyright 2011-2025 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" +#include "crypto/evp.h" +#include "crypto/evp/evp_local.h" +#include "internal/provider.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; + +static int drbg_hash_set_ctx_params_locked(void *vctx, const OSSL_PARAM params[]); + +/* 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 doesn't 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; + int ret = 0; + + if (drbg->lock != NULL && !CRYPTO_THREAD_write_lock(drbg->lock)) + return 0; + + if (!ossl_prov_is_running() + || !drbg_hash_set_ctx_params_locked(drbg, params)) + goto err; + ret = ossl_prov_drbg_instantiate(drbg, strength, prediction_resistance, + pstr, pstr_len); + err: + if (drbg->lock != NULL) + CRYPTO_THREAD_unlock(drbg->lock); + return ret; +} + +/* + * 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) +{ + PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; + int ret; + + if (drbg->lock != NULL && !CRYPTO_THREAD_write_lock(drbg->lock)) + return 0; + + ret = drbg_hash_uninstantiate(drbg); + + if (drbg->lock != NULL) + CRYPTO_THREAD_unlock(drbg->lock); + + return ret; +} + +static int drbg_hash_verify_zeroization(void *vdrbg) +{ + PROV_DRBG *drbg = (PROV_DRBG *)vdrbg; + PROV_DRBG_HASH *hash = (PROV_DRBG_HASH *)drbg->data; + int ret = 0; + + if (drbg->lock != NULL && !CRYPTO_THREAD_read_lock(drbg->lock)) + return 0; + + PROV_DRBG_VERIFY_ZEROIZATION(hash->V); + PROV_DRBG_VERIFY_ZEROIZATION(hash->C); + PROV_DRBG_VERIFY_ZEROIZATION(hash->vtmp); + + ret = 1; + err: + if (drbg->lock != NULL) + CRYPTO_THREAD_unlock(drbg->lock); + return ret; +} + +static int drbg_hash_new(PROV_DRBG *ctx) +{ + PROV_DRBG_HASH *hash; + + hash = OPENSSL_secure_zalloc(sizeof(*hash)); + if (hash == NULL) + return 0; + + OSSL_FIPS_IND_INIT(ctx) + + 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_free, + &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; + int ret = 0, complete = 0; + + if (!ossl_drbg_get_ctx_params_no_lock(drbg, params, &complete)) + return 0; + + if (complete) + return 1; + + if (drbg->lock != NULL && !CRYPTO_THREAD_read_lock(drbg->lock)) + return 0; + + 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))) + goto err; + } + + ret = ossl_drbg_get_ctx_params(drbg, params); + err: + if (drbg->lock != NULL) + CRYPTO_THREAD_unlock(drbg->lock); + + return ret; +} + +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_FIPS_IND_GETTABLE_CTX_PARAM() + OSSL_PARAM_END + }; + return known_gettable_ctx_params; +} + +static int drbg_fetch_digest_from_prov(const OSSL_PARAM params[], + OSSL_LIB_CTX *libctx, + EVP_MD **digest) +{ + OSSL_PROVIDER *prov = NULL; + const OSSL_PARAM *p; + EVP_MD *md = NULL; + int ret = 0; + + if (digest == NULL) + return 0; + + if ((p = OSSL_PARAM_locate_const(params, + OSSL_PROV_PARAM_CORE_PROV_NAME)) == NULL) + return 0; + if (p->data_type != OSSL_PARAM_UTF8_STRING) + return 0; + if ((prov = ossl_provider_find(libctx, (const char *)p->data, 1)) == NULL) + return 0; + + p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_DIGEST); + if (p == NULL) { + ret = 1; + goto done; + } + + if (p->data_type != OSSL_PARAM_UTF8_STRING) + goto done; + + md = evp_digest_fetch_from_prov(prov, (const char *)p->data, NULL); + if (md) { + EVP_MD_free(*digest); + *digest = md; + ret = 1; + } + +done: + ossl_provider_free(prov); + return ret; +} + +static int drbg_hash_set_ctx_params_locked(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); + EVP_MD *prov_md = NULL; + const EVP_MD *md; + int md_size; + + if (!OSSL_FIPS_IND_SET_CTX_PARAM(ctx, OSSL_FIPS_IND_SETTABLE0, params, + OSSL_DRBG_PARAM_FIPS_DIGEST_CHECK)) + return 0; + + /* try to fetch digest from provider */ + (void)ERR_set_mark(); + if (!drbg_fetch_digest_from_prov(params, libctx, &prov_md)) { + (void)ERR_pop_to_mark(); + /* fall back to full implementation search */ + if (!ossl_prov_digest_load_from_params(&hash->digest, params, libctx)) + return 0; + } else { + (void)ERR_clear_last_mark(); + if (prov_md) + ossl_prov_digest_set_md(&hash->digest, prov_md); + } + + md = ossl_prov_digest_md(&hash->digest); + if (md != NULL) { + if (!ossl_drbg_verify_digest(ctx, libctx, md)) + return 0; /* Error already raised for us */ + + /* These are taken from SP 800-90 10.1 Table 2 */ + md_size = EVP_MD_get_size(md); + if (md_size <= 0) + return 0; + hash->blocklen = md_size; + /* 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 int drbg_hash_set_ctx_params(void *vctx, const OSSL_PARAM params[]) +{ + PROV_DRBG *drbg = (PROV_DRBG *)vctx; + int ret; + + if (drbg->lock != NULL && !CRYPTO_THREAD_write_lock(drbg->lock)) + return 0; + + ret = drbg_hash_set_ctx_params_locked(vctx, params); + + if (drbg->lock != NULL) + CRYPTO_THREAD_unlock(drbg->lock); + + return ret; +} + +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_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_DRBG_PARAM_FIPS_DIGEST_CHECK) + 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 }, + OSSL_DISPATCH_END +}; 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