1 /* 2 * Copyright 2022-2024 The OpenSSL Project Authors. All Rights Reserved. 3 * 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 8 */ 9 10 #include "cipher_sm4_xts.h" 11 12 #define XTS_SET_KEY_FN(fn_set_enc_key, fn_set_dec_key, \ 13 fn_block_enc, fn_block_dec, \ 14 fn_stream, fn_stream_gb) { \ 15 size_t bytes = keylen / 2; \ 16 \ 17 if (ctx->enc) { \ 18 fn_set_enc_key(key, &xctx->ks1.ks); \ 19 xctx->xts.block1 = (block128_f)fn_block_enc; \ 20 } else { \ 21 fn_set_dec_key(key, &xctx->ks1.ks); \ 22 xctx->xts.block1 = (block128_f)fn_block_dec; \ 23 } \ 24 fn_set_enc_key(key + bytes, &xctx->ks2.ks); \ 25 xctx->xts.block2 = (block128_f)fn_block_enc; \ 26 xctx->xts.key1 = &xctx->ks1; \ 27 xctx->xts.key2 = &xctx->ks2; \ 28 xctx->stream = fn_stream; \ 29 xctx->stream_gb = fn_stream_gb; \ 30 } 31 32 static int cipher_hw_sm4_xts_generic_initkey(PROV_CIPHER_CTX *ctx, 33 const unsigned char *key, 34 size_t keylen) 35 { 36 PROV_SM4_XTS_CTX *xctx = (PROV_SM4_XTS_CTX *)ctx; 37 OSSL_xts_stream_fn stream = NULL; 38 OSSL_xts_stream_fn stream_gb = NULL; 39 #ifdef HWSM4_CAPABLE 40 if (HWSM4_CAPABLE) { 41 XTS_SET_KEY_FN(HWSM4_set_encrypt_key, HWSM4_set_decrypt_key, 42 HWSM4_encrypt, HWSM4_decrypt, stream, stream_gb); 43 return 1; 44 } else 45 #endif /* HWSM4_CAPABLE */ 46 #ifdef VPSM4_EX_CAPABLE 47 if (VPSM4_EX_CAPABLE) { 48 stream = vpsm4_ex_xts_encrypt; 49 stream_gb = vpsm4_ex_xts_encrypt_gb; 50 XTS_SET_KEY_FN(vpsm4_ex_set_encrypt_key, vpsm4_ex_set_decrypt_key, 51 vpsm4_ex_encrypt, vpsm4_ex_decrypt, stream, stream_gb); 52 return 1; 53 } else 54 #endif /* VPSM4_EX_CAPABLE */ 55 #ifdef VPSM4_CAPABLE 56 if (VPSM4_CAPABLE) { 57 stream = vpsm4_xts_encrypt; 58 stream_gb = vpsm4_xts_encrypt_gb; 59 XTS_SET_KEY_FN(vpsm4_set_encrypt_key, vpsm4_set_decrypt_key, 60 vpsm4_encrypt, vpsm4_decrypt, stream, stream_gb); 61 return 1; 62 } else 63 #endif /* VPSM4_CAPABLE */ 64 { 65 (void)0; 66 } 67 { 68 XTS_SET_KEY_FN(ossl_sm4_set_key, ossl_sm4_set_key, ossl_sm4_encrypt, 69 ossl_sm4_decrypt, stream, stream_gb); 70 } 71 return 1; 72 } 73 74 static void cipher_hw_sm4_xts_copyctx(PROV_CIPHER_CTX *dst, 75 const PROV_CIPHER_CTX *src) 76 { 77 PROV_SM4_XTS_CTX *sctx = (PROV_SM4_XTS_CTX *)src; 78 PROV_SM4_XTS_CTX *dctx = (PROV_SM4_XTS_CTX *)dst; 79 80 *dctx = *sctx; 81 dctx->xts.key1 = &dctx->ks1.ks; 82 dctx->xts.key2 = &dctx->ks2.ks; 83 } 84 85 86 static const PROV_CIPHER_HW sm4_generic_xts = { 87 cipher_hw_sm4_xts_generic_initkey, 88 NULL, 89 cipher_hw_sm4_xts_copyctx 90 }; 91 92 #if defined(OPENSSL_CPUID_OBJ) && defined(__riscv) && __riscv_xlen == 64 93 # include "cipher_sm4_xts_hw_rv64i.inc" 94 #else 95 const PROV_CIPHER_HW *ossl_prov_cipher_hw_sm4_xts(size_t keybits) 96 { 97 return &sm4_generic_xts; 98 } 99 #endif 100