[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #ifndef OPENSSL_NO_DES
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| 13 | # include <openssl/evp.h>
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| 14 | # include <openssl/objects.h>
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| 15 | # include "internal/evp_int.h"
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| 16 | # include <openssl/des.h>
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| 17 | # include <openssl/rand.h>
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| 18 |
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| 19 | typedef struct {
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| 20 | union {
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| 21 | double align;
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| 22 | DES_key_schedule ks;
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| 23 | } ks;
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| 24 | union {
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| 25 | void (*cbc) (const void *, void *, size_t,
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| 26 | const DES_key_schedule *, unsigned char *);
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| 27 | } stream;
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| 28 | } EVP_DES_KEY;
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| 29 |
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| 30 | # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
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| 31 | /* ----------^^^ this is not a typo, just a way to detect that
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| 32 | * assembler support was in general requested... */
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| 33 | # include "sparc_arch.h"
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| 34 |
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| 35 | extern unsigned int OPENSSL_sparcv9cap_P[];
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| 36 |
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| 37 | # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
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| 38 |
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| 39 | void des_t4_key_expand(const void *key, DES_key_schedule *ks);
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| 40 | void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
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| 41 | const DES_key_schedule *ks, unsigned char iv[8]);
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| 42 | void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
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| 43 | const DES_key_schedule *ks, unsigned char iv[8]);
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| 44 | # endif
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| 45 |
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| 46 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 47 | const unsigned char *iv, int enc);
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| 48 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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| 49 |
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| 50 | /*
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| 51 | * Because of various casts and different names can't use
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| 52 | * IMPLEMENT_BLOCK_CIPHER
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| 53 | */
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| 54 |
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| 55 | static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 56 | const unsigned char *in, size_t inl)
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| 57 | {
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| 58 | BLOCK_CIPHER_ecb_loop()
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| 59 | DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
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| 60 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 61 | EVP_CIPHER_CTX_encrypting(ctx));
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| 62 | return 1;
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| 63 | }
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| 64 |
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| 65 | static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 66 | const unsigned char *in, size_t inl)
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| 67 | {
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| 68 | while (inl >= EVP_MAXCHUNK) {
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| 69 | int num = EVP_CIPHER_CTX_num(ctx);
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| 70 | DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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| 71 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 72 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
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| 73 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 74 | inl -= EVP_MAXCHUNK;
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| 75 | in += EVP_MAXCHUNK;
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| 76 | out += EVP_MAXCHUNK;
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| 77 | }
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| 78 | if (inl) {
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| 79 | int num = EVP_CIPHER_CTX_num(ctx);
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| 80 | DES_ofb64_encrypt(in, out, (long)inl,
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| 81 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 82 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
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| 83 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 84 | }
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| 85 | return 1;
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| 86 | }
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| 87 |
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| 88 | static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 89 | const unsigned char *in, size_t inl)
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| 90 | {
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| 91 | EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
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| 92 |
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| 93 | if (dat->stream.cbc != NULL) {
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| 94 | (*dat->stream.cbc) (in, out, inl, &dat->ks.ks,
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| 95 | EVP_CIPHER_CTX_iv_noconst(ctx));
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| 96 | return 1;
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| 97 | }
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| 98 | while (inl >= EVP_MAXCHUNK) {
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| 99 | DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK,
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| 100 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 101 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 102 | EVP_CIPHER_CTX_encrypting(ctx));
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| 103 | inl -= EVP_MAXCHUNK;
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| 104 | in += EVP_MAXCHUNK;
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| 105 | out += EVP_MAXCHUNK;
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| 106 | }
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| 107 | if (inl)
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| 108 | DES_ncbc_encrypt(in, out, (long)inl,
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| 109 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 110 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 111 | EVP_CIPHER_CTX_encrypting(ctx));
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| 112 | return 1;
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| 113 | }
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| 114 |
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| 115 | static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 116 | const unsigned char *in, size_t inl)
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| 117 | {
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| 118 | while (inl >= EVP_MAXCHUNK) {
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| 119 | int num = EVP_CIPHER_CTX_num(ctx);
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| 120 | DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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| 121 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 122 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
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| 123 | EVP_CIPHER_CTX_encrypting(ctx));
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| 124 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 125 | inl -= EVP_MAXCHUNK;
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| 126 | in += EVP_MAXCHUNK;
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| 127 | out += EVP_MAXCHUNK;
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| 128 | }
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| 129 | if (inl) {
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| 130 | int num = EVP_CIPHER_CTX_num(ctx);
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| 131 | DES_cfb64_encrypt(in, out, (long)inl,
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| 132 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 133 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
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| 134 | EVP_CIPHER_CTX_encrypting(ctx));
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| 135 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 136 | }
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| 137 | return 1;
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| 138 | }
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| 139 |
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| 140 | /*
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| 141 | * Although we have a CFB-r implementation for DES, it doesn't pack the right
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| 142 | * way, so wrap it here
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| 143 | */
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| 144 | static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 145 | const unsigned char *in, size_t inl)
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| 146 | {
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| 147 | size_t n, chunk = EVP_MAXCHUNK / 8;
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| 148 | unsigned char c[1], d[1];
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| 149 |
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| 150 | if (inl < chunk)
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| 151 | chunk = inl;
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| 152 |
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| 153 | while (inl && inl >= chunk) {
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| 154 | for (n = 0; n < chunk * 8; ++n) {
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| 155 | c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
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| 156 | DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 157 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 158 | EVP_CIPHER_CTX_encrypting(ctx));
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| 159 | out[n / 8] =
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| 160 | (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
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| 161 | ((d[0] & 0x80) >> (unsigned int)(n % 8));
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| 162 | }
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| 163 | inl -= chunk;
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| 164 | in += chunk;
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| 165 | out += chunk;
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| 166 | if (inl < chunk)
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| 167 | chunk = inl;
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| 168 | }
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| 169 |
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| 170 | return 1;
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| 171 | }
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| 172 |
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| 173 | static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 174 | const unsigned char *in, size_t inl)
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| 175 | {
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| 176 | while (inl >= EVP_MAXCHUNK) {
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| 177 | DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
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| 178 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 179 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 180 | EVP_CIPHER_CTX_encrypting(ctx));
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| 181 | inl -= EVP_MAXCHUNK;
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| 182 | in += EVP_MAXCHUNK;
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| 183 | out += EVP_MAXCHUNK;
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| 184 | }
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| 185 | if (inl)
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| 186 | DES_cfb_encrypt(in, out, 8, (long)inl,
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| 187 | EVP_CIPHER_CTX_get_cipher_data(ctx),
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| 188 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 189 | EVP_CIPHER_CTX_encrypting(ctx));
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| 190 | return 1;
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| 191 | }
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| 192 |
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| 193 | BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
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| 194 | EVP_CIPH_RAND_KEY, des_init_key, NULL,
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| 195 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
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| 196 |
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| 197 | BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
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| 198 | EVP_CIPH_RAND_KEY, des_init_key, NULL,
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| 199 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
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| 200 |
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| 201 | BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
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| 202 | EVP_CIPH_RAND_KEY, des_init_key, NULL,
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| 203 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
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| 204 |
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| 205 | static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 206 | const unsigned char *iv, int enc)
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| 207 | {
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| 208 | DES_cblock *deskey = (DES_cblock *)key;
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| 209 | EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
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| 210 |
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| 211 | dat->stream.cbc = NULL;
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| 212 | # if defined(SPARC_DES_CAPABLE)
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| 213 | if (SPARC_DES_CAPABLE) {
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| 214 | int mode = EVP_CIPHER_CTX_mode(ctx);
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| 215 |
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| 216 | if (mode == EVP_CIPH_CBC_MODE) {
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| 217 | des_t4_key_expand(key, &dat->ks.ks);
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| 218 | dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
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| 219 | return 1;
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| 220 | }
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| 221 | }
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| 222 | # endif
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| 223 | DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx));
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| 224 | return 1;
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| 225 | }
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| 226 |
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| 227 | static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
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| 228 | {
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| 229 |
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| 230 | switch (type) {
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| 231 | case EVP_CTRL_RAND_KEY:
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| 232 | if (RAND_bytes(ptr, 8) <= 0)
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| 233 | return 0;
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| 234 | DES_set_odd_parity((DES_cblock *)ptr);
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| 235 | return 1;
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| 236 |
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| 237 | default:
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| 238 | return -1;
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| 239 | }
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| 240 | }
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| 241 |
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| 242 | #endif
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