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/providercommonerr.h"
  21
  22 /* TODO(3.0) Figure out what flags need to be here */
  23 #define DES_FLAGS (EVP_CIPH_RAND_KEY)
  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 = OPENSSL_zalloc(sizeof(*ctx));
  36
  37     if (ctx != NULL)
  38         cipher_generic_initkey(ctx, kbits, blkbits, ivbits, mode, flags, hw,
  39                                provctx);
  40     return ctx;
  41 }
  42
  43 static void *des_dupctx(void *ctx)
  44 {
  45     PROV_DES_CTX *in = (PROV_DES_CTX *)ctx;
  46     PROV_DES_CTX *ret = OPENSSL_malloc(sizeof(*ret));
  47
  48     if (ret == NULL) {
  49         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  50         return NULL;
  51     }
  52     in->base.hw->copyctx(&ret->base, &in->base);
  53
  54     return ret;
  55 }
  56
  57 static void des_freectx(void *vctx)
  58 {
  59     PROV_DES_CTX *ctx = (PROV_DES_CTX *)vctx;
  60
  61     OPENSSL_clear_free(ctx,  sizeof(*ctx));
  62 }
  63
  64 static int des_init(void *vctx, const unsigned char *key, size_t keylen,
  65                     const unsigned char *iv, size_t ivlen, int enc)
  66 {
  67     PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
  68
  69     ctx->enc = enc;
  70
  71     if (iv != NULL) {
  72         if (!cipher_generic_initiv(ctx, iv, ivlen))
  73             return 0;
  74     }
  75
  76     if (key != NULL) {
  77         if (keylen != ctx->keylen) {
  78             ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN);
  79             return 0;
  80         }
  81         return ctx->hw->init(ctx, key, keylen);
  82     }
  83     return 1;
  84 }
  85
  86 static int des_einit(void *vctx, const unsigned char *key, size_t keylen,
  87                      const unsigned char *iv, size_t ivlen)
  88 {
  89     return des_init(vctx, key, keylen, iv, ivlen, 1);
  90 }
  91
  92 static int des_dinit(void *vctx, const unsigned char *key, size_t keylen,
  93                      const unsigned char *iv, size_t ivlen)
  94 {
  95     return des_init(vctx, key, keylen, iv, ivlen, 0);
  96 }
  97
  98 static int des_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
  99 {
 100
 101     DES_cblock *deskey = ptr;
 102     size_t kl = ctx->keylen;
 103
 104     if (kl == 0 || RAND_priv_bytes_ex(ctx->libctx, ptr, kl) <= 0)
 105         return 0;
 106     DES_set_odd_parity(deskey);
 107     return 1;
 108 }
 109
 110 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(des)
 111     OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
 112 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(des)
 113
 114 static int des_get_ctx_params(void *vctx, OSSL_PARAM params[])
 115 {
 116     PROV_CIPHER_CTX  *ctx = (PROV_CIPHER_CTX *)vctx;
 117     OSSL_PARAM *p;
 118
 119     if (!cipher_generic_get_ctx_params(vctx, params))
 120         return 0;
 121
 122     p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
 123     if (p != NULL && !des_generatekey(ctx, p->data)) {
 124         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
 125         return 0;
 126     }
 127     return 1;
 128 }
 129
 130 #define IMPLEMENT_des_cipher(type, lcmode, UCMODE, flags,                      \
 131                              kbits, blkbits, ivbits, block)                    \
 132 static OSSL_FUNC_cipher_newctx_fn type##_##lcmode##_newctx;                    \
 133 static void *des_##lcmode##_newctx(void *provctx)                              \
 134 {                                                                              \
 135     return des_newctx(provctx, kbits, blkbits, ivbits,                         \
 136                       EVP_CIPH_##UCMODE##_MODE, flags,                         \
 137                       PROV_CIPHER_HW_des_##lcmode());                          \
 138 }                                                                              \
 139 static OSSL_FUNC_cipher_get_params_fn des_##lcmode##_get_params;               \
 140 static int des_##lcmode##_get_params(OSSL_PARAM params[])                      \
 141 {                                                                              \
 142     return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags,  \
 143                                      kbits, blkbits, ivbits);                  \
 144 }                                                                              \
 145 const OSSL_DISPATCH des_##lcmode##_functions[] = {                             \
 146     { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))des_einit },              \
 147     { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))des_dinit },              \
 148     { OSSL_FUNC_CIPHER_UPDATE,                                                 \
 149       (void (*)(void))cipher_generic_##block##_update },                       \
 150     { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##block##_final },\
 151     { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher },        \
 152     { OSSL_FUNC_CIPHER_NEWCTX,                                                 \
 153       (void (*)(void))des_##lcmode##_newctx },                                 \
 154     { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))des_dupctx },                   \
 155     { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))des_freectx },                 \
 156     { OSSL_FUNC_CIPHER_GET_PARAMS,                                             \
 157       (void (*)(void))des_##lcmode##_get_params },                             \
 158     { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,                                        \
 159       (void (*)(void))cipher_generic_gettable_params },                        \
 160     { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))des_get_ctx_params },   \
 161     { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,                                    \
 162       (void (*)(void))des_gettable_ctx_params },                               \
 163     { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,                                         \
 164      (void (*)(void))cipher_generic_set_ctx_params },                          \
 165     { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,                                    \
 166      (void (*)(void))cipher_generic_settable_ctx_params },                     \
 167     { 0, NULL }                                                                \
 168 }
 169
 170 /* des_ecb_functions */
 171 IMPLEMENT_des_cipher(des, ecb, ECB, DES_FLAGS, 64, 64, 0, block);
 172 /* des_cbc_functions */
 173 IMPLEMENT_des_cipher(des, cbc, CBC, DES_FLAGS, 64, 64, 64, block);
 174 /* des_ofb64_functions */
 175 IMPLEMENT_des_cipher(des, ofb64, OFB, DES_FLAGS, 64, 8, 64, stream);
 176 /* des_cfb64_functions */
 177 IMPLEMENT_des_cipher(des, cfb64, CFB, DES_FLAGS, 64, 8, 64, stream);
 178 /* des_cfb1_functions */
 179 IMPLEMENT_des_cipher(des, cfb1, CFB, DES_FLAGS, 64, 8, 64, stream);
 180 /* des_cfb8_functions */
 181 IMPLEMENT_des_cipher(des, cfb8, CFB, DES_FLAGS, 64, 8, 64, stream);