providers/implementations/ciphers/cipher_des.c

   1 /*
   2  * Copyright 2019-2021 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 /*
  11  * DES low level APIs are deprecated for public use, but still ok for internal
  12  * use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/rand.h>
  17 #include <openssl/proverr.h>
  18 #include "prov/ciphercommon.h"
  19 #include "cipher_des.h"
  20 #include "prov/implementations.h"
  21 #include "prov/providercommon.h"
  22
  23 #define DES_FLAGS 0
  24
  25 static OSSL_FUNC_cipher_freectx_fn des_freectx;
  26 static OSSL_FUNC_cipher_encrypt_init_fn des_einit;
  27 static OSSL_FUNC_cipher_decrypt_init_fn des_dinit;
  28 static OSSL_FUNC_cipher_get_ctx_params_fn des_get_ctx_params;
  29 static OSSL_FUNC_cipher_gettable_ctx_params_fn des_gettable_ctx_params;
  30
  31 static void *des_newctx(void *provctx, size_t kbits, size_t blkbits,
  32                         size_t ivbits, unsigned int mode, uint64_t flags,
  33                         const PROV_CIPHER_HW *hw)
  34 {
  35     PROV_DES_CTX *ctx;
  36
  37     if (!ossl_prov_is_running())
  38         return NULL;
  39
  40     ctx = OPENSSL_zalloc(sizeof(*ctx));
  41     if (ctx != NULL)
  42         ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, mode, flags,
  43                                     hw, provctx);
  44     return ctx;
  45 }
  46
  47 static void *des_dupctx(void *ctx)
  48 {
  49     PROV_DES_CTX *in = (PROV_DES_CTX *)ctx;
  50     PROV_DES_CTX *ret;
  51
  52     if (!ossl_prov_is_running())
  53         return NULL;
  54
  55     ret = OPENSSL_malloc(sizeof(*ret));
  56     if (ret == NULL) {
  57         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  58         return NULL;
  59     }
  60     in->base.hw->copyctx(&ret->base, &in->base);
  61
  62     return ret;
  63 }
  64
  65 static void des_freectx(void *vctx)
  66 {
  67     PROV_DES_CTX *ctx = (PROV_DES_CTX *)vctx;
  68
  69     ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
  70     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  71 }
  72
  73 static int des_init(void *vctx, const unsigned char *key, size_t keylen,
  74                     const unsigned char *iv, size_t ivlen, int enc)
  75 {
  76     PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
  77
  78     if (!ossl_prov_is_running())
  79         return 0;
  80
  81     ctx->num = 0;
  82     ctx->bufsz = 0;
  83     ctx->enc = enc;
  84
  85     if (iv != NULL) {
  86         if (!ossl_cipher_generic_initiv(ctx, iv, ivlen))
  87             return 0;
  88     }
  89
  90     if (key != NULL) {
  91         if (keylen != ctx->keylen) {
  92             ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
  93             return 0;
  94         }
  95         return ctx->hw->init(ctx, key, keylen);
  96     }
  97     return 1;
  98 }
  99
 100 static int des_einit(void *vctx, const unsigned char *key, size_t keylen,
 101                      const unsigned char *iv, size_t ivlen)
 102 {
 103     return des_init(vctx, key, keylen, iv, ivlen, 1);
 104 }
 105
 106 static int des_dinit(void *vctx, const unsigned char *key, size_t keylen,
 107                      const unsigned char *iv, size_t ivlen)
 108 {
 109     return des_init(vctx, key, keylen, iv, ivlen, 0);
 110 }
 111
 112 static int des_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
 113 {
 114
 115     DES_cblock *deskey = ptr;
 116     size_t kl = ctx->keylen;
 117
 118     if (kl == 0 || RAND_priv_bytes_ex(ctx->libctx, ptr, kl) <= 0)
 119         return 0;
 120     DES_set_odd_parity(deskey);
 121     return 1;
 122 }
 123
 124 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(des)
 125     OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
 126 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(des)
 127
 128 static int des_get_ctx_params(void *vctx, OSSL_PARAM params[])
 129 {
 130     PROV_CIPHER_CTX  *ctx = (PROV_CIPHER_CTX *)vctx;
 131     OSSL_PARAM *p;
 132
 133     if (!ossl_cipher_generic_get_ctx_params(vctx, params))
 134         return 0;
 135
 136     p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
 137     if (p != NULL && !des_generatekey(ctx, p->data)) {
 138         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
 139         return 0;
 140     }
 141     return 1;
 142 }
 143
 144 #define IMPLEMENT_des_cipher(type, lcmode, UCMODE, flags,                      \
 145                              kbits, blkbits, ivbits, block)                    \
 146 static OSSL_FUNC_cipher_newctx_fn type##_##lcmode##_newctx;                    \
 147 static void *des_##lcmode##_newctx(void *provctx)                              \
 148 {                                                                              \
 149     return des_newctx(provctx, kbits, blkbits, ivbits,                         \
 150                       EVP_CIPH_##UCMODE##_MODE, flags,                         \
 151                       ossl_prov_cipher_hw_des_##lcmode());                          \
 152 }                                                                              \
 153 static OSSL_FUNC_cipher_get_params_fn des_##lcmode##_get_params;               \
 154 static int des_##lcmode##_get_params(OSSL_PARAM params[])                      \
 155 {                                                                              \
 156     return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE,    \
 157                                           flags, kbits, blkbits, ivbits);      \
 158 }                                                                              \
 159 const OSSL_DISPATCH ossl_##des_##lcmode##_functions[] = {                      \
 160     { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))des_einit },              \
 161     { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))des_dinit },              \
 162     { OSSL_FUNC_CIPHER_UPDATE,                                                 \
 163       (void (*)(void))ossl_cipher_generic_##block##_update },                  \
 164     { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##block##_final },\
 165     { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher },   \
 166     { OSSL_FUNC_CIPHER_NEWCTX,                                                 \
 167       (void (*)(void))des_##lcmode##_newctx },                                 \
 168     { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))des_dupctx },                   \
 169     { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))des_freectx },                 \
 170     { OSSL_FUNC_CIPHER_GET_PARAMS,                                             \
 171       (void (*)(void))des_##lcmode##_get_params },                             \
 172     { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,                                        \
 173       (void (*)(void))ossl_cipher_generic_gettable_params },                   \
 174     { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))des_get_ctx_params },   \
 175     { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,                                    \
 176       (void (*)(void))des_gettable_ctx_params },                               \
 177     { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,                                         \
 178      (void (*)(void))ossl_cipher_generic_set_ctx_params },                     \
 179     { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,                                    \
 180      (void (*)(void))ossl_cipher_generic_settable_ctx_params },                \
 181     { 0, NULL }                                                                \
 182 }
 183
 184 /* ossl_des_ecb_functions */
 185 IMPLEMENT_des_cipher(des, ecb, ECB, DES_FLAGS, 64, 64, 0, block);
 186 /* ossl_des_cbc_functions */
 187 IMPLEMENT_des_cipher(des, cbc, CBC, DES_FLAGS, 64, 64, 64, block);
 188 /* ossl_des_ofb64_functions */
 189 IMPLEMENT_des_cipher(des, ofb64, OFB, DES_FLAGS, 64, 8, 64, stream);
 190 /* ossl_des_cfb64_functions */
 191 IMPLEMENT_des_cipher(des, cfb64, CFB, DES_FLAGS, 64, 8, 64, stream);
 192 /* ossl_des_cfb1_functions */
 193 IMPLEMENT_des_cipher(des, cfb1, CFB, DES_FLAGS, 64, 8, 64, stream);
 194 /* ossl_des_cfb8_functions */
 195 IMPLEMENT_des_cipher(des, cfb8, CFB, DES_FLAGS, 64, 8, 64, stream);