providers/implementations/ciphers/cipher_des.c

   1 /*
   2  * Copyright 2019-2020 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 "prov/ciphercommon.h"
  17 #include "cipher_des.h"
  18 #include <openssl/rand.h>
  19 #include "prov/implementations.h"
  20 #include "prov/providercommon.h"
  21 #include "prov/providercommonerr.h"
  22
  23 /* TODO(3.0) Figure out what flags need to be here */
  24 #define DES_FLAGS (EVP_CIPH_RAND_KEY)
  25
  26 static OSSL_FUNC_cipher_freectx_fn des_freectx;
  27 static OSSL_FUNC_cipher_encrypt_init_fn des_einit;
  28 static OSSL_FUNC_cipher_decrypt_init_fn des_dinit;
  29 static OSSL_FUNC_cipher_get_ctx_params_fn des_get_ctx_params;
  30 static OSSL_FUNC_cipher_gettable_ctx_params_fn des_gettable_ctx_params;
  31
  32 static void *des_newctx(void *provctx, size_t kbits, size_t blkbits,
  33                         size_t ivbits, unsigned int mode, uint64_t flags,
  34                         const PROV_CIPHER_HW *hw)
  35 {
  36     PROV_DES_CTX *ctx;
  37
  38     if (!ossl_prov_is_running())
  39         return NULL;
  40
  41     ctx = OPENSSL_zalloc(sizeof(*ctx));
  42     if (ctx != NULL)
  43         ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, mode, flags,
  44                                     hw, provctx);
  45     return ctx;
  46 }
  47
  48 static void *des_dupctx(void *ctx)
  49 {
  50     PROV_DES_CTX *in = (PROV_DES_CTX *)ctx;
  51     PROV_DES_CTX *ret;
  52
  53     if (!ossl_prov_is_running())
  54         return NULL;
  55
  56     ret = OPENSSL_malloc(sizeof(*ret));
  57     if (ret == NULL) {
  58         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  59         return NULL;
  60     }
  61     in->base.hw->copyctx(&ret->base, &in->base);
  62
  63     return ret;
  64 }
  65
  66 static void des_freectx(void *vctx)
  67 {
  68     PROV_DES_CTX *ctx = (PROV_DES_CTX *)vctx;
  69
  70     ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
  71     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  72 }
  73
  74 static int des_init(void *vctx, const unsigned char *key, size_t keylen,
  75                     const unsigned char *iv, size_t ivlen, int enc)
  76 {
  77     PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
  78
  79     if (!ossl_prov_is_running())
  80         return 0;
  81
  82     ctx->num = 0;
  83     ctx->bufsz = 0;
  84     ctx->enc = enc;
  85
  86     if (iv != NULL) {
  87         if (!ossl_cipher_generic_initiv(ctx, iv, ivlen))
  88             return 0;
  89     }
  90
  91     if (key != NULL) {
  92         if (keylen != ctx->keylen) {
  93             ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN);
  94             return 0;
  95         }
  96         return ctx->hw->init(ctx, key, keylen);
  97     }
  98     return 1;
  99 }
 100
 101 static int des_einit(void *vctx, const unsigned char *key, size_t keylen,
 102                      const unsigned char *iv, size_t ivlen)
 103 {
 104     return des_init(vctx, key, keylen, iv, ivlen, 1);
 105 }
 106
 107 static int des_dinit(void *vctx, const unsigned char *key, size_t keylen,
 108                      const unsigned char *iv, size_t ivlen)
 109 {
 110     return des_init(vctx, key, keylen, iv, ivlen, 0);
 111 }
 112
 113 static int des_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
 114 {
 115
 116     DES_cblock *deskey = ptr;
 117     size_t kl = ctx->keylen;
 118
 119     if (kl == 0 || RAND_priv_bytes_ex(ctx->libctx, ptr, kl) <= 0)
 120         return 0;
 121     DES_set_odd_parity(deskey);
 122     return 1;
 123 }
 124
 125 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(des)
 126     OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
 127 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(des)
 128
 129 static int des_get_ctx_params(void *vctx, OSSL_PARAM params[])
 130 {
 131     PROV_CIPHER_CTX  *ctx = (PROV_CIPHER_CTX *)vctx;
 132     OSSL_PARAM *p;
 133
 134     if (!ossl_cipher_generic_get_ctx_params(vctx, params))
 135         return 0;
 136
 137     p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
 138     if (p != NULL && !des_generatekey(ctx, p->data)) {
 139         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
 140         return 0;
 141     }
 142     return 1;
 143 }
 144
 145 #define IMPLEMENT_des_cipher(type, lcmode, UCMODE, flags,                      \
 146                              kbits, blkbits, ivbits, block)                    \
 147 static OSSL_FUNC_cipher_newctx_fn type##_##lcmode##_newctx;                    \
 148 static void *des_##lcmode##_newctx(void *provctx)                              \
 149 {                                                                              \
 150     return des_newctx(provctx, kbits, blkbits, ivbits,                         \
 151                       EVP_CIPH_##UCMODE##_MODE, flags,                         \
 152                       PROV_CIPHER_HW_des_##lcmode());                          \
 153 }                                                                              \
 154 static OSSL_FUNC_cipher_get_params_fn des_##lcmode##_get_params;               \
 155 static int des_##lcmode##_get_params(OSSL_PARAM params[])                      \
 156 {                                                                              \
 157     return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE,    \
 158                                           flags, kbits, blkbits, ivbits);      \
 159 }                                                                              \
 160 const OSSL_DISPATCH ossl_##des_##lcmode##_functions[] = {                      \
 161     { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))des_einit },              \
 162     { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))des_dinit },              \
 163     { OSSL_FUNC_CIPHER_UPDATE,                                                 \
 164       (void (*)(void))ossl_cipher_generic_##block##_update },                  \
 165     { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##block##_final },\
 166     { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher },   \
 167     { OSSL_FUNC_CIPHER_NEWCTX,                                                 \
 168       (void (*)(void))des_##lcmode##_newctx },                                 \
 169     { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))des_dupctx },                   \
 170     { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))des_freectx },                 \
 171     { OSSL_FUNC_CIPHER_GET_PARAMS,                                             \
 172       (void (*)(void))des_##lcmode##_get_params },                             \
 173     { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,                                        \
 174       (void (*)(void))ossl_cipher_generic_gettable_params },                   \
 175     { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))des_get_ctx_params },   \
 176     { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,                                    \
 177       (void (*)(void))des_gettable_ctx_params },                               \
 178     { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,                                         \
 179      (void (*)(void))ossl_cipher_generic_set_ctx_params },                     \
 180     { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,                                    \
 181      (void (*)(void))ossl_cipher_generic_settable_ctx_params },                \
 182     { 0, NULL }                                                                \
 183 }
 184
 185 /* ossl_des_ecb_functions */
 186 IMPLEMENT_des_cipher(des, ecb, ECB, DES_FLAGS, 64, 64, 0, block);
 187 /* ossl_des_cbc_functions */
 188 IMPLEMENT_des_cipher(des, cbc, CBC, DES_FLAGS, 64, 64, 64, block);
 189 /* ossl_des_ofb64_functions */
 190 IMPLEMENT_des_cipher(des, ofb64, OFB, DES_FLAGS, 64, 8, 64, stream);
 191 /* ossl_des_cfb64_functions */
 192 IMPLEMENT_des_cipher(des, cfb64, CFB, DES_FLAGS, 64, 8, 64, stream);
 193 /* ossl_des_cfb1_functions */
 194 IMPLEMENT_des_cipher(des, cfb1, CFB, DES_FLAGS, 64, 8, 64, stream);
 195 /* ossl_des_cfb8_functions */
 196 IMPLEMENT_des_cipher(des, cfb8, CFB, DES_FLAGS, 64, 8, 64, stream);