1/* 2 * Copyright 2019-2021 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/* 11 * Crypto extention support for AES GCM. 12 * This file is included by cipher_aes_gcm_hw.c 13 */ 14 15size_t armv8_aes_gcm_encrypt(const unsigned char *in, unsigned char *out, size_t len, 16 const void *key, unsigned char ivec[16], u64 *Xi) 17{ 18 size_t align_bytes = 0; 19 align_bytes = len - len % 16; 20 21 AES_KEY *aes_key = (AES_KEY *)key; 22 23 switch(aes_key->rounds) { 24 case 10: 25 aes_gcm_enc_128_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key); 26 break; 27 case 12: 28 aes_gcm_enc_192_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key); 29 break; 30 case 14: 31 aes_gcm_enc_256_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key); 32 break; 33 } 34 return align_bytes; 35} 36 37size_t armv8_aes_gcm_decrypt(const unsigned char *in, unsigned char *out, size_t len, 38 const void *key, unsigned char ivec[16], u64 *Xi) 39{ 40 size_t align_bytes = 0; 41 align_bytes = len - len % 16; 42 43 AES_KEY *aes_key = (AES_KEY *)key; 44 45 switch(aes_key->rounds) { 46 case 10: 47 aes_gcm_dec_128_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key); 48 break; 49 case 12: 50 aes_gcm_dec_192_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key); 51 break; 52 case 14: 53 aes_gcm_dec_256_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key); 54 break; 55 } 56 return align_bytes; 57} 58 59static int armv8_aes_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key, 60 size_t keylen) 61{ 62 PROV_AES_GCM_CTX *actx = (PROV_AES_GCM_CTX *)ctx; 63 AES_KEY *ks = &actx->ks.ks; 64 65 GCM_HW_SET_KEY_CTR_FN(ks, aes_v8_set_encrypt_key, aes_v8_encrypt, 66 aes_v8_ctr32_encrypt_blocks); 67 return 1; 68} 69 70 71static const PROV_GCM_HW armv8_aes_gcm = { 72 armv8_aes_gcm_initkey, 73 ossl_gcm_setiv, 74 ossl_gcm_aad_update, 75 generic_aes_gcm_cipher_update, 76 ossl_gcm_cipher_final, 77 ossl_gcm_one_shot 78}; 79 80const PROV_GCM_HW *ossl_prov_aes_hw_gcm(size_t keybits) 81{ 82 return AES_PMULL_CAPABLE ? &armv8_aes_gcm : &aes_gcm; 83} 84