providers/implementations/ciphers/ciphercommon_hw.c

   1 /*
   2  * Copyright 2019 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 "prov/ciphercommon.h"
  11
  12 /*-
  13  * The generic cipher functions for cipher modes cbc, ecb, ofb, cfb and ctr.
  14  * Used if there is no special hardware implementations.
  15  */
  16 int ossl_cipher_hw_generic_cbc(PROV_CIPHER_CTX *dat, unsigned char *out,
  17                           const unsigned char *in, size_t len)
  18 {
  19     if (dat->stream.cbc)
  20         (*dat->stream.cbc) (in, out, len, dat->ks, dat->iv, dat->enc);
  21     else if (dat->enc)
  22         CRYPTO_cbc128_encrypt(in, out, len, dat->ks, dat->iv, dat->block);
  23     else
  24         CRYPTO_cbc128_decrypt(in, out, len, dat->ks, dat->iv, dat->block);
  25
  26     return 1;
  27 }
  28
  29 int ossl_cipher_hw_generic_ecb(PROV_CIPHER_CTX *dat, unsigned char *out,
  30                           const unsigned char *in, size_t len)
  31 {
  32     size_t i, bl = dat->blocksize;
  33
  34     if (len < bl)
  35         return 1;
  36
  37     if (dat->stream.ecb) {
  38         (*dat->stream.ecb) (in, out, len, dat->ks, dat->enc);
  39     }
  40     else {
  41         for (i = 0, len -= bl; i <= len; i += bl)
  42             (*dat->block) (in + i, out + i, dat->ks);
  43     }
  44
  45     return 1;
  46 }
  47
  48 int ossl_cipher_hw_generic_ofb128(PROV_CIPHER_CTX *dat, unsigned char *out,
  49                              const unsigned char *in, size_t len)
  50 {
  51     int num = dat->num;
  52
  53     CRYPTO_ofb128_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->block);
  54     dat->num = num;
  55
  56     return 1;
  57 }
  58
  59 int ossl_cipher_hw_generic_cfb128(PROV_CIPHER_CTX *dat, unsigned char *out,
  60                                   const unsigned char *in, size_t len)
  61 {
  62     int num = dat->num;
  63
  64     CRYPTO_cfb128_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->enc,
  65                           dat->block);
  66     dat->num = num;
  67
  68     return 1;
  69 }
  70
  71 int ossl_cipher_hw_generic_cfb8(PROV_CIPHER_CTX *dat, unsigned char *out,
  72                            const unsigned char *in, size_t len)
  73 {
  74     int num = dat->num;
  75
  76     CRYPTO_cfb128_8_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->enc,
  77                             dat->block);
  78     dat->num = num;
  79
  80     return 1;
  81 }
  82
  83 int ossl_cipher_hw_generic_cfb1(PROV_CIPHER_CTX *dat, unsigned char *out,
  84                            const unsigned char *in, size_t len)
  85 {
  86     int num = dat->num;
  87
  88     if ((dat->flags & EVP_CIPH_FLAG_LENGTH_BITS) != 0) {
  89         CRYPTO_cfb128_1_encrypt(in, out, len, dat->ks, dat->iv, &num,
  90                                 dat->enc, dat->block);
  91         dat->num = num;
  92         return 1;
  93     }
  94
  95     while (len >= MAXBITCHUNK) {
  96         CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, dat->ks,
  97                                 dat->iv, &num, dat->enc, dat->block);
  98         len -= MAXBITCHUNK;
  99         out += MAXBITCHUNK;
 100         in  += MAXBITCHUNK;
 101     }
 102     if (len)
 103         CRYPTO_cfb128_1_encrypt(in, out, len * 8, dat->ks, dat->iv, &num,
 104                                 dat->enc, dat->block);
 105
 106     dat->num = num;
 107
 108     return 1;
 109 }
 110
 111 int ossl_cipher_hw_generic_ctr(PROV_CIPHER_CTX *dat, unsigned char *out,
 112                           const unsigned char *in, size_t len)
 113 {
 114     unsigned int num = dat->num;
 115
 116     if (dat->stream.ctr)
 117         CRYPTO_ctr128_encrypt_ctr32(in, out, len, dat->ks, dat->iv, dat->buf,
 118                                     &num, dat->stream.ctr);
 119     else
 120         CRYPTO_ctr128_encrypt(in, out, len, dat->ks, dat->iv, dat->buf,
 121                               &num, dat->block);
 122     dat->num = num;
 123
 124     return 1;
 125 }
 126
 127 /*-
 128  * The chunked cipher functions for cipher modes cbc, ecb, ofb, cfb and ctr.
 129  * Used if there is no special hardware implementations.
 130  */
 131
 132 int ossl_cipher_hw_chunked_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out,
 133                           const unsigned char *in, size_t inl)
 134 {
 135     while (inl >= MAXCHUNK) {
 136         ossl_cipher_hw_generic_cbc(ctx, out, in, MAXCHUNK);
 137         inl -= MAXCHUNK;
 138         in  += MAXCHUNK;
 139         out += MAXCHUNK;
 140     }
 141     if (inl > 0)
 142         ossl_cipher_hw_generic_cbc(ctx, out, in, inl);
 143     return 1;
 144 }
 145
 146 int ossl_cipher_hw_chunked_cfb8(PROV_CIPHER_CTX *ctx, unsigned char *out,
 147                            const unsigned char *in, size_t inl)
 148 {
 149     size_t chunk = MAXCHUNK;
 150
 151     if (inl < chunk)
 152         chunk = inl;
 153     while (inl > 0 && inl >= chunk) {
 154         ossl_cipher_hw_generic_cfb8(ctx, out, in, inl);
 155         inl -= chunk;
 156         in += chunk;
 157         out += chunk;
 158         if (inl < chunk)
 159             chunk = inl;
 160     }
 161     return 1;
 162 }
 163
 164 int ossl_cipher_hw_chunked_cfb128(PROV_CIPHER_CTX *ctx, unsigned char *out,
 165                              const unsigned char *in, size_t inl)
 166 {
 167     size_t chunk = MAXCHUNK;
 168
 169     if (inl < chunk)
 170         chunk = inl;
 171     while (inl > 0 && inl >= chunk) {
 172         ossl_cipher_hw_generic_cfb128(ctx, out, in, inl);
 173         inl -= chunk;
 174         in += chunk;
 175         out += chunk;
 176         if (inl < chunk)
 177             chunk = inl;
 178     }
 179     return 1;
 180 }
 181
 182 int ossl_cipher_hw_chunked_ofb128(PROV_CIPHER_CTX *ctx, unsigned char *out,
 183                              const unsigned char *in, size_t inl)
 184 {
 185     while (inl >= MAXCHUNK) {
 186         ossl_cipher_hw_generic_ofb128(ctx, out, in, MAXCHUNK);
 187         inl -= MAXCHUNK;
 188         in  += MAXCHUNK;
 189         out += MAXCHUNK;
 190     }
 191     if (inl > 0)
 192         ossl_cipher_hw_generic_ofb128(ctx, out, in, inl);
 193     return 1;
 194 }