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- /*
- * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- /*
- * Crypto extention support for AES GCM.
- * This file is included by cipher_aes_gcm_hw.c
- */
- size_t armv8_aes_gcm_encrypt(const unsigned char *in, unsigned char *out, size_t len,
- const void *key, unsigned char ivec[16], u64 *Xi)
- {
- size_t align_bytes = 0;
- align_bytes = len - len % 16;
- AES_KEY *aes_key = (AES_KEY *)key;
- switch(aes_key->rounds) {
- case 10:
- aes_gcm_enc_128_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
- break;
- case 12:
- aes_gcm_enc_192_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
- break;
- case 14:
- aes_gcm_enc_256_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
- break;
- }
- return align_bytes;
- }
- size_t armv8_aes_gcm_decrypt(const unsigned char *in, unsigned char *out, size_t len,
- const void *key, unsigned char ivec[16], u64 *Xi)
- {
- size_t align_bytes = 0;
- align_bytes = len - len % 16;
- AES_KEY *aes_key = (AES_KEY *)key;
- switch(aes_key->rounds) {
- case 10:
- aes_gcm_dec_128_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
- break;
- case 12:
- aes_gcm_dec_192_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
- break;
- case 14:
- aes_gcm_dec_256_kernel(in, align_bytes * 8, out, (uint64_t *)Xi, ivec, key);
- break;
- }
- return align_bytes;
- }
- static int armv8_aes_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
- size_t keylen)
- {
- PROV_AES_GCM_CTX *actx = (PROV_AES_GCM_CTX *)ctx;
- AES_KEY *ks = &actx->ks.ks;
- GCM_HW_SET_KEY_CTR_FN(ks, aes_v8_set_encrypt_key, aes_v8_encrypt,
- aes_v8_ctr32_encrypt_blocks);
- return 1;
- }
- static const PROV_GCM_HW armv8_aes_gcm = {
- armv8_aes_gcm_initkey,
- ossl_gcm_setiv,
- ossl_gcm_aad_update,
- generic_aes_gcm_cipher_update,
- ossl_gcm_cipher_final,
- ossl_gcm_one_shot
- };
- const PROV_GCM_HW *ossl_prov_aes_hw_gcm(size_t keybits)
- {
- return AES_PMULL_CAPABLE ? &armv8_aes_gcm : &aes_gcm;
- }
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