/* * Copyright 2018-2022 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 <openssl/core_dispatch.h> #include <openssl/core_names.h> #include <openssl/params.h> #include <openssl/evp.h> #include <openssl/err.h> #include <openssl/proverr.h> #include "crypto/siphash.h" #include "prov/implementations.h" #include "prov/providercommon.h" /* * Forward declaration of everything implemented here. This is not strictly * necessary for the compiler, but provides an assurance that the signatures * of the functions in the dispatch table are correct. */ static OSSL_FUNC_mac_newctx_fn siphash_new; static OSSL_FUNC_mac_dupctx_fn siphash_dup; static OSSL_FUNC_mac_freectx_fn siphash_free; static OSSL_FUNC_mac_gettable_ctx_params_fn siphash_gettable_ctx_params; static OSSL_FUNC_mac_get_ctx_params_fn siphash_get_ctx_params; static OSSL_FUNC_mac_settable_ctx_params_fn siphash_settable_ctx_params; static OSSL_FUNC_mac_set_ctx_params_fn siphash_set_params; static OSSL_FUNC_mac_init_fn siphash_init; static OSSL_FUNC_mac_update_fn siphash_update; static OSSL_FUNC_mac_final_fn siphash_final; struct siphash_data_st { void *provctx; SIPHASH siphash; /* Siphash data */ SIPHASH sipcopy; /* Siphash data copy for reinitialization */ unsigned int crounds, drounds; }; static unsigned int crounds(struct siphash_data_st *ctx) { return ctx->crounds != 0 ? ctx->crounds : SIPHASH_C_ROUNDS; } static unsigned int drounds(struct siphash_data_st *ctx) { return ctx->drounds != 0 ? ctx->drounds : SIPHASH_D_ROUNDS; } static void *siphash_new(void *provctx) { struct siphash_data_st *ctx; if (!ossl_prov_is_running()) return NULL; ctx = OPENSSL_zalloc(sizeof(*ctx)); if (ctx != NULL) ctx->provctx = provctx; return ctx; } static void siphash_free(void *vmacctx) { OPENSSL_free(vmacctx); } static void *siphash_dup(void *vsrc) { struct siphash_data_st *ssrc = vsrc; struct siphash_data_st *sdst; if (!ossl_prov_is_running()) return NULL; sdst = OPENSSL_malloc(sizeof(*sdst)); if (sdst == NULL) return NULL; *sdst = *ssrc; return sdst; } static size_t siphash_size(void *vmacctx) { struct siphash_data_st *ctx = vmacctx; return SipHash_hash_size(&ctx->siphash); } static int siphash_setkey(struct siphash_data_st *ctx, const unsigned char *key, size_t keylen) { int ret; if (keylen != SIPHASH_KEY_SIZE) return 0; ret = SipHash_Init(&ctx->siphash, key, crounds(ctx), drounds(ctx)); if (ret) ctx->sipcopy = ctx->siphash; return ret; } static int siphash_init(void *vmacctx, const unsigned char *key, size_t keylen, const OSSL_PARAM params[]) { struct siphash_data_st *ctx = vmacctx; if (!ossl_prov_is_running() || !siphash_set_params(ctx, params)) return 0; /* * Without a key, there is not much to do here, * The actual initialization happens through controls. */ if (key == NULL) { ctx->siphash = ctx->sipcopy; return 1; } return siphash_setkey(ctx, key, keylen); } static int siphash_update(void *vmacctx, const unsigned char *data, size_t datalen) { struct siphash_data_st *ctx = vmacctx; if (datalen == 0) return 1; SipHash_Update(&ctx->siphash, data, datalen); return 1; } static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl, size_t outsize) { struct siphash_data_st *ctx = vmacctx; size_t hlen = siphash_size(ctx); if (!ossl_prov_is_running() || outsize < hlen) return 0; *outl = hlen; return SipHash_Final(&ctx->siphash, out, hlen); } static const OSSL_PARAM *siphash_gettable_ctx_params(ossl_unused void *ctx, ossl_unused void *provctx) { static const OSSL_PARAM known_gettable_ctx_params[] = { OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), OSSL_PARAM_uint(OSSL_MAC_PARAM_C_ROUNDS, NULL), OSSL_PARAM_uint(OSSL_MAC_PARAM_D_ROUNDS, NULL), OSSL_PARAM_END }; return known_gettable_ctx_params; } static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[]) { struct siphash_data_st *ctx = vmacctx; OSSL_PARAM *p; if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL && !OSSL_PARAM_set_size_t(p, siphash_size(vmacctx))) return 0; if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_C_ROUNDS)) != NULL && !OSSL_PARAM_set_uint(p, crounds(ctx))) return 0; if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_D_ROUNDS)) != NULL && !OSSL_PARAM_set_uint(p, drounds(ctx))) return 0; return 1; } static const OSSL_PARAM *siphash_settable_ctx_params(ossl_unused void *ctx, void *provctx) { static const OSSL_PARAM known_settable_ctx_params[] = { OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0), OSSL_PARAM_uint(OSSL_MAC_PARAM_C_ROUNDS, NULL), OSSL_PARAM_uint(OSSL_MAC_PARAM_D_ROUNDS, NULL), OSSL_PARAM_END }; return known_settable_ctx_params; } static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params) { struct siphash_data_st *ctx = vmacctx; const OSSL_PARAM *p = NULL; size_t size; if (params == NULL) return 1; if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) { if (!OSSL_PARAM_get_size_t(p, &size) || !SipHash_set_hash_size(&ctx->siphash, size) || !SipHash_set_hash_size(&ctx->sipcopy, size)) return 0; } if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_C_ROUNDS)) != NULL && !OSSL_PARAM_get_uint(p, &ctx->crounds)) return 0; if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_D_ROUNDS)) != NULL && !OSSL_PARAM_get_uint(p, &ctx->drounds)) return 0; if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) if (p->data_type != OSSL_PARAM_OCTET_STRING || !siphash_setkey(ctx, p->data, p->data_size)) return 0; return 1; } const OSSL_DISPATCH ossl_siphash_functions[] = { { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new }, { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup }, { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free }, { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init }, { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update }, { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final }, { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS, (void (*)(void))siphash_gettable_ctx_params }, { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params }, { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS, (void (*)(void))siphash_settable_ctx_params }, { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params }, { 0, NULL } };