| /* |
| * Copyright 2018-2020 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 <stdarg.h> |
| #include <openssl/evp.h> |
| #include <openssl/err.h> |
| #include <openssl/core.h> |
| #include <openssl/core_names.h> |
| #include <openssl/types.h> |
| #include "internal/nelem.h" |
| #include "crypto/evp.h" |
| #include "internal/provider.h" |
| #include "evp_local.h" |
| |
| EVP_MAC_CTX *EVP_MAC_CTX_new(EVP_MAC *mac) |
| { |
| EVP_MAC_CTX *ctx = OPENSSL_zalloc(sizeof(EVP_MAC_CTX)); |
| |
| if (ctx == NULL |
| || (ctx->data = mac->newctx(ossl_provider_ctx(mac->prov))) == NULL |
| || !EVP_MAC_up_ref(mac)) { |
| EVPerr(EVP_F_EVP_MAC_CTX_NEW, ERR_R_MALLOC_FAILURE); |
| if (ctx != NULL) |
| mac->freectx(ctx->data); |
| OPENSSL_free(ctx); |
| ctx = NULL; |
| } else { |
| ctx->meth = mac; |
| } |
| return ctx; |
| } |
| |
| void EVP_MAC_CTX_free(EVP_MAC_CTX *ctx) |
| { |
| if (ctx != NULL) { |
| ctx->meth->freectx(ctx->data); |
| ctx->data = NULL; |
| /* refcnt-- */ |
| EVP_MAC_free(ctx->meth); |
| } |
| OPENSSL_free(ctx); |
| } |
| |
| EVP_MAC_CTX *EVP_MAC_CTX_dup(const EVP_MAC_CTX *src) |
| { |
| EVP_MAC_CTX *dst; |
| |
| if (src->data == NULL) |
| return NULL; |
| |
| dst = OPENSSL_malloc(sizeof(*dst)); |
| if (dst == NULL) { |
| EVPerr(EVP_F_EVP_MAC_CTX_DUP, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| |
| *dst = *src; |
| if (!EVP_MAC_up_ref(dst->meth)) { |
| EVPerr(EVP_F_EVP_MAC_CTX_DUP, ERR_R_MALLOC_FAILURE); |
| OPENSSL_free(dst); |
| return NULL; |
| } |
| |
| dst->data = src->meth->dupctx(src->data); |
| if (dst->data == NULL) { |
| EVP_MAC_CTX_free(dst); |
| return NULL; |
| } |
| |
| return dst; |
| } |
| |
| EVP_MAC *EVP_MAC_CTX_mac(EVP_MAC_CTX *ctx) |
| { |
| return ctx->meth; |
| } |
| |
| size_t EVP_MAC_size(EVP_MAC_CTX *ctx) |
| { |
| size_t sz = 0; |
| |
| if (ctx->data != NULL) { |
| OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
| |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_MAC_PARAM_SIZE, &sz); |
| if (ctx->meth->get_ctx_params != NULL) { |
| if (ctx->meth->get_ctx_params(ctx->data, params)) |
| return sz; |
| } else if (ctx->meth->get_params != NULL) { |
| if (ctx->meth->get_params(params)) |
| return sz; |
| } |
| } |
| /* |
| * If the MAC hasn't been initialized yet, or there is no size to get, |
| * we return zero |
| */ |
| return 0; |
| } |
| |
| int EVP_MAC_init(EVP_MAC_CTX *ctx) |
| { |
| return ctx->meth->init(ctx->data); |
| } |
| |
| int EVP_MAC_update(EVP_MAC_CTX *ctx, const unsigned char *data, size_t datalen) |
| { |
| if (datalen == 0) |
| return 1; |
| return ctx->meth->update(ctx->data, data, datalen); |
| } |
| |
| int EVP_MAC_final(EVP_MAC_CTX *ctx, |
| unsigned char *out, size_t *outl, size_t outsize) |
| { |
| int l = EVP_MAC_size(ctx); |
| |
| if (l < 0) |
| return 0; |
| if (outl != NULL) |
| *outl = l; |
| if (out == NULL) |
| return 1; |
| return ctx->meth->final(ctx->data, out, outl, outsize); |
| } |
| |
| /* |
| * The {get,set}_params functions return 1 if there is no corresponding |
| * function in the implementation. This is the same as if there was one, |
| * but it didn't recognise any of the given params, i.e. nothing in the |
| * bag of parameters was useful. |
| */ |
| int EVP_MAC_get_params(EVP_MAC *mac, OSSL_PARAM params[]) |
| { |
| if (mac->get_params != NULL) |
| return mac->get_params(params); |
| return 1; |
| } |
| |
| int EVP_MAC_CTX_get_params(EVP_MAC_CTX *ctx, OSSL_PARAM params[]) |
| { |
| if (ctx->meth->get_ctx_params != NULL) |
| return ctx->meth->get_ctx_params(ctx->data, params); |
| return 1; |
| } |
| |
| int EVP_MAC_CTX_set_params(EVP_MAC_CTX *ctx, const OSSL_PARAM params[]) |
| { |
| if (ctx->meth->set_ctx_params != NULL) |
| return ctx->meth->set_ctx_params(ctx->data, params); |
| return 1; |
| } |
| |
| int EVP_MAC_number(const EVP_MAC *mac) |
| { |
| return mac->name_id; |
| } |
| |
| int EVP_MAC_is_a(const EVP_MAC *mac, const char *name) |
| { |
| return evp_is_a(mac->prov, mac->name_id, NULL, name); |
| } |
| |
| void EVP_MAC_names_do_all(const EVP_MAC *mac, |
| void (*fn)(const char *name, void *data), |
| void *data) |
| { |
| if (mac->prov != NULL) |
| evp_names_do_all(mac->prov, mac->name_id, fn, data); |
| } |