2 * Copyright 2021-2022 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * Generic support for SM4 GCM.
14 #include "cipher_sm4_gcm.h"
15 #include "crypto/sm4_platform.h"
17 static int sm4_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
20 PROV_SM4_GCM_CTX *actx = (PROV_SM4_GCM_CTX *)ctx;
21 SM4_KEY *ks = &actx->ks.ks;
26 HWSM4_set_encrypt_key(key, ks);
27 CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f) HWSM4_encrypt);
28 # ifdef HWSM4_ctr32_encrypt_blocks
29 ctx->ctr = (ctr128_f) HWSM4_ctr32_encrypt_blocks;
30 # else /* HWSM4_ctr32_encrypt_blocks */
31 ctx->ctr = (ctr128_f)NULL;
34 # endif /* HWSM4_CAPABLE */
37 vpsm4_set_encrypt_key(key, ks);
38 CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f) vpsm4_encrypt);
39 ctx->ctr = (ctr128_f) vpsm4_ctr32_encrypt_blocks;
41 # endif /* VPSM4_CAPABLE */
43 ossl_sm4_set_key(key, ks);
44 CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f)ossl_sm4_encrypt);
45 ctx->ctr = (ctr128_f)NULL;
52 static int hw_gcm_cipher_update(PROV_GCM_CTX *ctx, const unsigned char *in,
53 size_t len, unsigned char *out)
56 if (ctx->ctr != NULL) {
57 if (CRYPTO_gcm128_encrypt_ctr32(&ctx->gcm, in, out, len, ctx->ctr))
60 if (CRYPTO_gcm128_encrypt(&ctx->gcm, in, out, len))
64 if (ctx->ctr != NULL) {
65 if (CRYPTO_gcm128_decrypt_ctr32(&ctx->gcm, in, out, len, ctx->ctr))
68 if (CRYPTO_gcm128_decrypt(&ctx->gcm, in, out, len))
75 static const PROV_GCM_HW sm4_gcm = {
80 ossl_gcm_cipher_final,
84 const PROV_GCM_HW *ossl_prov_sm4_hw_gcm(size_t keybits)