148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/*
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* Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* DES low level APIs are deprecated for public use, but still ok for internal
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* use.
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*/
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#include "internal/deprecated.h"
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#include <openssl/rand.h>
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#include <openssl/proverr.h>
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#include "prov/ciphercommon.h"
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#include "cipher_tdes.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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void *ossl_tdes_newctx(void *provctx, int mode, size_t kbits, size_t blkbits,
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size_t ivbits, uint64_t flags, const PROV_CIPHER_HW *hw)
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{
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PROV_TDES_CTX *tctx;
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if (!ossl_prov_is_running())
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return NULL;
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tctx = OPENSSL_zalloc(sizeof(*tctx));
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if (tctx != NULL)
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ossl_cipher_generic_initkey(tctx, kbits, blkbits, ivbits, mode, flags,
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hw, provctx);
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return tctx;
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}
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void *ossl_tdes_dupctx(void *ctx)
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{
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PROV_TDES_CTX *in = (PROV_TDES_CTX *)ctx;
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PROV_TDES_CTX *ret;
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if (!ossl_prov_is_running())
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return NULL;
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ret = OPENSSL_malloc(sizeof(*ret));
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if (ret == NULL)
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return NULL;
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in->base.hw->copyctx(&ret->base, &in->base);
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return ret;
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}
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void ossl_tdes_freectx(void *vctx)
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{
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PROV_TDES_CTX *ctx = (PROV_TDES_CTX *)vctx;
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ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
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OPENSSL_clear_free(ctx, sizeof(*ctx));
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}
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static int tdes_init(void *vctx, const unsigned char *key, size_t keylen,
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const unsigned char *iv, size_t ivlen,
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const OSSL_PARAM params[], int enc)
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{
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PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
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if (!ossl_prov_is_running())
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return 0;
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ctx->num = 0;
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ctx->bufsz = 0;
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ctx->enc = enc;
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if (iv != NULL) {
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if (!ossl_cipher_generic_initiv(ctx, iv, ivlen))
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return 0;
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} else if (ctx->iv_set
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&& (ctx->mode == EVP_CIPH_CBC_MODE
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|| ctx->mode == EVP_CIPH_CFB_MODE
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|| ctx->mode == EVP_CIPH_OFB_MODE)) {
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/* reset IV to keep compatibility with 1.1.1 */
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memcpy(ctx->iv, ctx->oiv, ctx->ivlen);
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}
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if (key != NULL) {
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if (keylen != ctx->keylen) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
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return 0;
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}
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if (!ctx->hw->init(ctx, key, ctx->keylen))
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return 0;
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ctx->key_set = 1;
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}
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return ossl_cipher_generic_set_ctx_params(ctx, params);
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}
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int ossl_tdes_einit(void *vctx, const unsigned char *key, size_t keylen,
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const unsigned char *iv, size_t ivlen,
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const OSSL_PARAM params[])
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{
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return tdes_init(vctx, key, keylen, iv, ivlen, params, 1);
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}
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int ossl_tdes_dinit(void *vctx, const unsigned char *key, size_t keylen,
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const unsigned char *iv, size_t ivlen,
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const OSSL_PARAM params[])
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{
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return tdes_init(vctx, key, keylen, iv, ivlen, params, 0);
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}
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CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(ossl_tdes)
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OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
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CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(ossl_tdes)
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static int tdes_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
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{
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DES_cblock *deskey = ptr;
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size_t kl = ctx->keylen;
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if (kl == 0 || RAND_priv_bytes_ex(ctx->libctx, ptr, kl, 0) <= 0)
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return 0;
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DES_set_odd_parity(deskey);
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if (kl >= 16) {
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DES_set_odd_parity(deskey + 1);
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if (kl >= 24)
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DES_set_odd_parity(deskey + 2);
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}
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return 1;
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}
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int ossl_tdes_get_ctx_params(void *vctx, OSSL_PARAM params[])
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{
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PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
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OSSL_PARAM *p;
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if (!ossl_cipher_generic_get_ctx_params(vctx, params))
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return 0;
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p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
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if (p != NULL && !tdes_generatekey(ctx, p->data)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
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return 0;
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}
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return 1;
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}
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