1 /*
2  * Copyright 2009-2021 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 #include <stdlib.h>
11 #include <string.h>
12 
13 #include <openssl/opensslconf.h>
14 #include "crypto/chacha.h"
15 #include "crypto/ppc_arch.h"
16 
17 void ChaCha20_ctr32_int(unsigned char *out, const unsigned char *inp,
18                         size_t len, const unsigned int key[8],
19                         const unsigned int counter[4]);
20 void ChaCha20_ctr32_vmx(unsigned char *out, const unsigned char *inp,
21                         size_t len, const unsigned int key[8],
22                         const unsigned int counter[4]);
23 void ChaCha20_ctr32_vsx(unsigned char *out, const unsigned char *inp,
24                         size_t len, const unsigned int key[8],
25                         const unsigned int counter[4]);
26 void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp,
27                     size_t len, const unsigned int key[8],
28                     const unsigned int counter[4])
29 {
30     OPENSSL_ppccap_P & PPC_CRYPTO207
31         ? ChaCha20_ctr32_vsx(out, inp, len, key, counter)
32         : OPENSSL_ppccap_P & PPC_ALTIVEC
33             ? ChaCha20_ctr32_vmx(out, inp, len, key, counter)
34             : ChaCha20_ctr32_int(out, inp, len, key, counter);
35 }
36