providers/implementations/ciphers/cipher_rc5.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 /* Dispatch functions for RC5 cipher modes ecb, cbc, ofb, cfb */
  11
  12 #include "cipher_rc5.h"
  13 #include "prov/implementations.h"
  14 #include "prov/providercommonerr.h"
  15
  16 static OSSL_OP_cipher_freectx_fn rc5_freectx;
  17 static OSSL_OP_cipher_dupctx_fn rc5_dupctx;
  18 OSSL_OP_cipher_gettable_ctx_params_fn rc5_gettable_ctx_params;
  19 OSSL_OP_cipher_settable_ctx_params_fn rc5_settable_ctx_params;
  20
  21 static void rc5_freectx(void *vctx)
  22 {
  23     PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx;
  24
  25     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  26 }
  27
  28 static void *rc5_dupctx(void *ctx)
  29 {
  30     PROV_RC5_CTX *in = (PROV_RC5_CTX *)ctx;
  31     PROV_RC5_CTX *ret = OPENSSL_malloc(sizeof(*ret));
  32
  33     if (ret == NULL) {
  34         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  35         return NULL;
  36     }
  37     *ret = *in;
  38
  39     return ret;
  40 }
  41
  42 static int rc5_set_ctx_params(void *vctx, const OSSL_PARAM params[])
  43 {
  44     PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx;
  45     const OSSL_PARAM *p;
  46
  47     if (!cipher_generic_set_ctx_params(vctx, params))
  48         return 0;
  49
  50     p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ROUNDS);
  51     if (p != NULL) {
  52         unsigned int rounds;
  53
  54         if (!OSSL_PARAM_get_uint(p, &rounds)) {
  55             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
  56             return 0;
  57         }
  58         if (rounds != RC5_8_ROUNDS
  59             && rounds != RC5_12_ROUNDS
  60             && rounds != RC5_16_ROUNDS) {
  61             ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_NUMBER_OF_ROUNDS);
  62             return 0;
  63         }
  64         ctx->rounds = rounds;
  65     }
  66     return 1;
  67 }
  68
  69 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc5)
  70     OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL),
  71 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc5)
  72
  73 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc5)
  74     OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL),
  75 CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc5)
  76
  77
  78 static int rc5_get_ctx_params(void *vctx, OSSL_PARAM params[])
  79 {
  80     PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx;
  81     OSSL_PARAM *p;
  82
  83     if (!cipher_generic_get_ctx_params(vctx, params))
  84         return 0;
  85     p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ROUNDS);
  86     if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->rounds)) {
  87         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
  88         return 0;
  89     }
  90     return 1;
  91 }
  92
  93 #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits,             \
  94                          blkbits, ivbits, typ)                                 \
  95 static OSSL_OP_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params;     \
  96 static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[])          \
  97 {                                                                              \
  98     return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags,  \
  99                                      kbits, blkbits, ivbits);                  \
 100 }                                                                              \
 101 static OSSL_OP_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx;             \
 102 static void * alg##_##kbits##_##lcmode##_newctx(void *provctx)                 \
 103 {                                                                              \
 104      PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));                   \
 105      if (ctx != NULL) {                                                        \
 106          cipher_generic_initkey(ctx, kbits, blkbits, ivbits,                   \
 107                                 EVP_CIPH_##UCMODE##_MODE, flags,               \
 108                                 PROV_CIPHER_HW_##alg##_##lcmode(kbits), NULL); \
 109          ctx->rounds = RC5_12_ROUNDS;                                          \
 110      }                                                                         \
 111      return ctx;                                                               \
 112 }                                                                              \
 113 const OSSL_DISPATCH alg##kbits##lcmode##_functions[] = {                       \
 114     { OSSL_FUNC_CIPHER_NEWCTX,                                                 \
 115       (void (*)(void)) alg##_##kbits##_##lcmode##_newctx },                    \
 116     { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx },              \
 117     { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx },                \
 118     { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit },   \
 119     { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit },   \
 120     { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
 121     { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final },  \
 122     { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher },        \
 123     { OSSL_FUNC_CIPHER_GET_PARAMS,                                             \
 124       (void (*)(void)) alg##_##kbits##_##lcmode##_get_params },                \
 125     { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,                                        \
 126       (void (*)(void))cipher_generic_gettable_params },                        \
 127     { OSSL_FUNC_CIPHER_GET_CTX_PARAMS,                                         \
 128       (void (*)(void))rc5_get_ctx_params },                                    \
 129     { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,                                    \
 130       (void (*)(void))rc5_gettable_ctx_params },                               \
 131     { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,                                         \
 132       (void (*)(void))rc5_set_ctx_params },                                    \
 133     { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,                                    \
 134      (void (*)(void))rc5_settable_ctx_params },                                \
 135     { 0, NULL }                                                                \
 136 };
 137
 138 /* rc5128ecb_functions */
 139 IMPLEMENT_cipher(rc5, RC5, ecb, ECB, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 0, block)
 140 /* rc5128cbc_functions */
 141 IMPLEMENT_cipher(rc5, RC5, cbc, CBC, EVP_CIPH_VARIABLE_LENGTH, 128, 64, 64, block)
 142 /* rc5128ofb64_functions */
 143 IMPLEMENT_cipher(rc5, RC5, ofb64, OFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)
 144 /* rc5128cfb64_functions */
 145 IMPLEMENT_cipher(rc5, RC5, cfb64,  CFB, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 64, stream)