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      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