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88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
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* Copyright 2021-2022 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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* Generic support for SM4 GCM.
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*/
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#include "cipher_sm4_gcm.h"
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#include "crypto/sm4_platform.h"
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static int sm4_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
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size_t keylen)
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{
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PROV_SM4_GCM_CTX *actx = (PROV_SM4_GCM_CTX *)ctx;
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SM4_KEY *ks = &actx->ks.ks;
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ctx->ks = ks;
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# ifdef HWSM4_CAPABLE
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if (HWSM4_CAPABLE) {
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HWSM4_set_encrypt_key(key, ks);
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CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f) HWSM4_encrypt);
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# ifdef HWSM4_ctr32_encrypt_blocks
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ctx->ctr = (ctr128_f) HWSM4_ctr32_encrypt_blocks;
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# else /* HWSM4_ctr32_encrypt_blocks */
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ctx->ctr = (ctr128_f)NULL;
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# endif
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} else
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# endif /* HWSM4_CAPABLE */
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# ifdef VPSM4_CAPABLE
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if (VPSM4_CAPABLE) {
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vpsm4_set_encrypt_key(key, ks);
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CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f) vpsm4_encrypt);
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ctx->ctr = (ctr128_f) vpsm4_ctr32_encrypt_blocks;
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} else
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# endif /* VPSM4_CAPABLE */
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{
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ossl_sm4_set_key(key, ks);
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CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f)ossl_sm4_encrypt);
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ctx->ctr = (ctr128_f)NULL;
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}
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ctx->key_set = 1;
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return 1;
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}
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static int hw_gcm_cipher_update(PROV_GCM_CTX *ctx, const unsigned char *in,
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size_t len, unsigned char *out)
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{
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if (ctx->enc) {
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if (ctx->ctr != NULL) {
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if (CRYPTO_gcm128_encrypt_ctr32(&ctx->gcm, in, out, len, ctx->ctr))
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return 0;
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} else {
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if (CRYPTO_gcm128_encrypt(&ctx->gcm, in, out, len))
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return 0;
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}
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} else {
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if (ctx->ctr != NULL) {
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if (CRYPTO_gcm128_decrypt_ctr32(&ctx->gcm, in, out, len, ctx->ctr))
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return 0;
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} else {
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if (CRYPTO_gcm128_decrypt(&ctx->gcm, in, out, len))
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return 0;
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}
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}
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return 1;
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}
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static const PROV_GCM_HW sm4_gcm = {
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sm4_gcm_initkey,
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ossl_gcm_setiv,
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ossl_gcm_aad_update,
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hw_gcm_cipher_update,
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ossl_gcm_cipher_final,
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ossl_gcm_one_shot
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};
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const PROV_GCM_HW *ossl_prov_sm4_hw_gcm(size_t keybits)
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{
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return &sm4_gcm;
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}
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