[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 | # include "evp_locl.h"
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| 19 |
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| 20 | typedef struct {
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| 21 | union {
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| 22 | double align;
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| 23 | DES_key_schedule ks[3];
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| 24 | } ks;
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| 25 | union {
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| 26 | void (*cbc) (const void *, void *, size_t,
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| 27 | const DES_key_schedule *, unsigned char *);
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| 28 | } stream;
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| 29 | } DES_EDE_KEY;
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| 30 | # define ks1 ks.ks[0]
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| 31 | # define ks2 ks.ks[1]
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| 32 | # define ks3 ks.ks[2]
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| 33 |
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| 34 | # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
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| 35 | /* ---------^^^ this is not a typo, just a way to detect that
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| 36 | * assembler support was in general requested... */
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| 37 | # include "sparc_arch.h"
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| 38 |
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| 39 | extern unsigned int OPENSSL_sparcv9cap_P[];
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| 40 |
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| 41 | # define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
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| 42 |
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| 43 | void des_t4_key_expand(const void *key, DES_key_schedule *ks);
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| 44 | void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len,
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| 45 | const DES_key_schedule ks[3], unsigned char iv[8]);
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| 46 | void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len,
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| 47 | const DES_key_schedule ks[3], unsigned char iv[8]);
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| 48 | # endif
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| 49 |
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| 50 | static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 51 | const unsigned char *iv, int enc);
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| 52 |
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| 53 | static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 54 | const unsigned char *iv, int enc);
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| 55 |
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| 56 | static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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| 57 |
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| 58 | # define data(ctx) EVP_C_DATA(DES_EDE_KEY,ctx)
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| 59 |
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| 60 | /*
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| 61 | * Because of various casts and different args can't use
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| 62 | * IMPLEMENT_BLOCK_CIPHER
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| 63 | */
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| 64 |
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| 65 | static int des_ede_ecb_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 | BLOCK_CIPHER_ecb_loop()
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| 69 | DES_ecb3_encrypt((const_DES_cblock *)(in + i),
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| 70 | (DES_cblock *)(out + i),
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| 71 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 72 | &data(ctx)->ks3, EVP_CIPHER_CTX_encrypting(ctx));
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| 73 | return 1;
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| 74 | }
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| 75 |
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| 76 | static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 77 | const unsigned char *in, size_t inl)
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| 78 | {
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| 79 | while (inl >= EVP_MAXCHUNK) {
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| 80 | int num = EVP_CIPHER_CTX_num(ctx);
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| 81 | DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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| 82 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 83 | &data(ctx)->ks3,
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| 84 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 85 | &num);
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| 86 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 87 | inl -= EVP_MAXCHUNK;
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| 88 | in += EVP_MAXCHUNK;
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| 89 | out += EVP_MAXCHUNK;
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| 90 | }
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| 91 | if (inl) {
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| 92 | int num = EVP_CIPHER_CTX_num(ctx);
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| 93 | DES_ede3_ofb64_encrypt(in, out, (long)inl,
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| 94 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 95 | &data(ctx)->ks3,
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| 96 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 97 | &num);
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| 98 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 99 | }
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| 100 | return 1;
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| 101 | }
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| 102 |
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| 103 | static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 104 | const unsigned char *in, size_t inl)
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| 105 | {
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| 106 | DES_EDE_KEY *dat = data(ctx);
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| 107 |
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| 108 | if (dat->stream.cbc != NULL) {
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| 109 | (*dat->stream.cbc) (in, out, inl, dat->ks.ks,
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| 110 | EVP_CIPHER_CTX_iv_noconst(ctx));
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| 111 | return 1;
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| 112 | }
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| 113 |
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| 114 | while (inl >= EVP_MAXCHUNK) {
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| 115 | DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
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| 116 | &dat->ks1, &dat->ks2, &dat->ks3,
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| 117 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 118 | EVP_CIPHER_CTX_encrypting(ctx));
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| 119 | inl -= EVP_MAXCHUNK;
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| 120 | in += EVP_MAXCHUNK;
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| 121 | out += EVP_MAXCHUNK;
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| 122 | }
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| 123 | if (inl)
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| 124 | DES_ede3_cbc_encrypt(in, out, (long)inl,
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| 125 | &dat->ks1, &dat->ks2, &dat->ks3,
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| 126 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 127 | EVP_CIPHER_CTX_encrypting(ctx));
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| 128 | return 1;
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| 129 | }
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| 130 |
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| 131 | static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 132 | const unsigned char *in, size_t inl)
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| 133 | {
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| 134 | while (inl >= EVP_MAXCHUNK) {
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| 135 | int num = EVP_CIPHER_CTX_num(ctx);
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| 136 | DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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| 137 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 138 | &data(ctx)->ks3,
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| 139 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 140 | &num, EVP_CIPHER_CTX_encrypting(ctx));
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| 141 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 142 | inl -= EVP_MAXCHUNK;
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| 143 | in += EVP_MAXCHUNK;
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| 144 | out += EVP_MAXCHUNK;
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| 145 | }
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| 146 | if (inl) {
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| 147 | int num = EVP_CIPHER_CTX_num(ctx);
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| 148 | DES_ede3_cfb64_encrypt(in, out, (long)inl,
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| 149 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 150 | &data(ctx)->ks3,
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| 151 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 152 | &num, EVP_CIPHER_CTX_encrypting(ctx));
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| 153 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 154 | }
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| 155 | return 1;
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| 156 | }
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| 157 |
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| 158 | /*
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| 159 | * Although we have a CFB-r implementation for 3-DES, it doesn't pack the
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| 160 | * right way, so wrap it here
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| 161 | */
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| 162 | static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 163 | const unsigned char *in, size_t inl)
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| 164 | {
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| 165 | size_t n;
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| 166 | unsigned char c[1], d[1];
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| 167 |
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| 168 | if (!EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
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| 169 | inl *= 8;
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| 170 | for (n = 0; n < inl; ++n) {
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| 171 | c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
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| 172 | DES_ede3_cfb_encrypt(c, d, 1, 1,
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| 173 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 174 | &data(ctx)->ks3,
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| 175 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 176 | EVP_CIPHER_CTX_encrypting(ctx));
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| 177 | out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8)))
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| 178 | | ((d[0] & 0x80) >> (unsigned int)(n % 8));
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| 179 | }
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| 180 |
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| 181 | return 1;
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| 182 | }
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| 183 |
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| 184 | static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 185 | const unsigned char *in, size_t inl)
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| 186 | {
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| 187 | while (inl >= EVP_MAXCHUNK) {
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| 188 | DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
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| 189 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 190 | &data(ctx)->ks3,
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| 191 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 192 | EVP_CIPHER_CTX_encrypting(ctx));
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| 193 | inl -= EVP_MAXCHUNK;
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| 194 | in += EVP_MAXCHUNK;
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| 195 | out += EVP_MAXCHUNK;
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| 196 | }
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| 197 | if (inl)
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| 198 | DES_ede3_cfb_encrypt(in, out, 8, (long)inl,
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| 199 | &data(ctx)->ks1, &data(ctx)->ks2,
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| 200 | &data(ctx)->ks3,
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| 201 | (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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| 202 | EVP_CIPHER_CTX_encrypting(ctx));
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| 203 | return 1;
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| 204 | }
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| 205 |
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| 206 | BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
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| 207 | EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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| 208 | des_ede_init_key, NULL, NULL, NULL, des3_ctrl)
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| 209 | # define des_ede3_cfb64_cipher des_ede_cfb64_cipher
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| 210 | # define des_ede3_ofb_cipher des_ede_ofb_cipher
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| 211 | # define des_ede3_cbc_cipher des_ede_cbc_cipher
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| 212 | # define des_ede3_ecb_cipher des_ede_ecb_cipher
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| 213 | BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
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| 214 | EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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| 215 | des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
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| 216 |
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| 217 | BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1,
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| 218 | EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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| 219 | des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
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| 220 |
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| 221 | BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8,
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| 222 | EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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| 223 | des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
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| 224 |
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| 225 | static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 226 | const unsigned char *iv, int enc)
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| 227 | {
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| 228 | DES_cblock *deskey = (DES_cblock *)key;
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| 229 | DES_EDE_KEY *dat = data(ctx);
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| 230 |
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| 231 | dat->stream.cbc = NULL;
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| 232 | # if defined(SPARC_DES_CAPABLE)
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| 233 | if (SPARC_DES_CAPABLE) {
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| 234 | int mode = EVP_CIPHER_CTX_mode(ctx);
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| 235 |
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| 236 | if (mode == EVP_CIPH_CBC_MODE) {
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| 237 | des_t4_key_expand(&deskey[0], &dat->ks1);
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| 238 | des_t4_key_expand(&deskey[1], &dat->ks2);
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| 239 | memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
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| 240 | dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
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| 241 | des_t4_ede3_cbc_decrypt;
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| 242 | return 1;
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| 243 | }
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| 244 | }
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| 245 | # endif
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| 246 | DES_set_key_unchecked(&deskey[0], &dat->ks1);
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| 247 | DES_set_key_unchecked(&deskey[1], &dat->ks2);
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| 248 | memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
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| 249 | return 1;
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| 250 | }
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| 251 |
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| 252 | static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 253 | const unsigned char *iv, int enc)
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| 254 | {
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| 255 | DES_cblock *deskey = (DES_cblock *)key;
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| 256 | DES_EDE_KEY *dat = data(ctx);
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| 257 |
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| 258 | dat->stream.cbc = NULL;
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| 259 | # if defined(SPARC_DES_CAPABLE)
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| 260 | if (SPARC_DES_CAPABLE) {
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| 261 | int mode = EVP_CIPHER_CTX_mode(ctx);
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| 262 |
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| 263 | if (mode == EVP_CIPH_CBC_MODE) {
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| 264 | des_t4_key_expand(&deskey[0], &dat->ks1);
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| 265 | des_t4_key_expand(&deskey[1], &dat->ks2);
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| 266 | des_t4_key_expand(&deskey[2], &dat->ks3);
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| 267 | dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
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| 268 | des_t4_ede3_cbc_decrypt;
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| 269 | return 1;
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| 270 | }
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| 271 | }
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| 272 | # endif
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| 273 | DES_set_key_unchecked(&deskey[0], &dat->ks1);
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| 274 | DES_set_key_unchecked(&deskey[1], &dat->ks2);
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| 275 | DES_set_key_unchecked(&deskey[2], &dat->ks3);
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| 276 | return 1;
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| 277 | }
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| 278 |
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| 279 | static int des3_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
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| 280 | {
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| 281 |
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| 282 | DES_cblock *deskey = ptr;
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| 283 |
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| 284 | switch (type) {
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| 285 | case EVP_CTRL_RAND_KEY:
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| 286 | if (RAND_bytes(ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0)
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| 287 | return 0;
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| 288 | DES_set_odd_parity(deskey);
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| 289 | if (EVP_CIPHER_CTX_key_length(ctx) >= 16)
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| 290 | DES_set_odd_parity(deskey + 1);
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| 291 | if (EVP_CIPHER_CTX_key_length(ctx) >= 24)
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| 292 | DES_set_odd_parity(deskey + 2);
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| 293 | return 1;
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| 294 |
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| 295 | default:
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| 296 | return -1;
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| 297 | }
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| 298 | }
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| 299 |
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| 300 | const EVP_CIPHER *EVP_des_ede(void)
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| 301 | {
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| 302 | return &des_ede_ecb;
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| 303 | }
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| 304 |
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| 305 | const EVP_CIPHER *EVP_des_ede3(void)
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| 306 | {
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| 307 | return &des_ede3_ecb;
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| 308 | }
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| 309 |
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| 310 |
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| 311 | # include <openssl/sha.h>
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| 312 |
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| 313 | static const unsigned char wrap_iv[8] =
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| 314 | { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
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| 315 |
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| 316 | static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 317 | const unsigned char *in, size_t inl)
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| 318 | {
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| 319 | unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH];
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| 320 | int rv = -1;
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| 321 | if (inl < 24)
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| 322 | return -1;
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| 323 | if (out == NULL)
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| 324 | return inl - 16;
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| 325 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), wrap_iv, 8);
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| 326 | /* Decrypt first block which will end up as icv */
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| 327 | des_ede_cbc_cipher(ctx, icv, in, 8);
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| 328 | /* Decrypt central blocks */
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| 329 | /*
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| 330 | * If decrypting in place move whole output along a block so the next
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| 331 | * des_ede_cbc_cipher is in place.
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| 332 | */
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| 333 | if (out == in) {
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| 334 | memmove(out, out + 8, inl - 8);
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| 335 | in -= 8;
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| 336 | }
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| 337 | des_ede_cbc_cipher(ctx, out, in + 8, inl - 16);
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| 338 | /* Decrypt final block which will be IV */
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| 339 | des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8);
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| 340 | /* Reverse order of everything */
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| 341 | BUF_reverse(icv, NULL, 8);
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| 342 | BUF_reverse(out, NULL, inl - 16);
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| 343 | BUF_reverse(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 8);
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| 344 | /* Decrypt again using new IV */
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| 345 | des_ede_cbc_cipher(ctx, out, out, inl - 16);
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| 346 | des_ede_cbc_cipher(ctx, icv, icv, 8);
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| 347 | /* Work out SHA1 hash of first portion */
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| 348 | SHA1(out, inl - 16, sha1tmp);
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| 349 |
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| 350 | if (!CRYPTO_memcmp(sha1tmp, icv, 8))
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| 351 | rv = inl - 16;
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| 352 | OPENSSL_cleanse(icv, 8);
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| 353 | OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
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| 354 | OPENSSL_cleanse(iv, 8);
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| 355 | OPENSSL_cleanse(EVP_CIPHER_CTX_iv_noconst(ctx), 8);
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| 356 | if (rv == -1)
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| 357 | OPENSSL_cleanse(out, inl - 16);
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| 358 |
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| 359 | return rv;
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| 360 | }
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| 361 |
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| 362 | static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 363 | const unsigned char *in, size_t inl)
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| 364 | {
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| 365 | unsigned char sha1tmp[SHA_DIGEST_LENGTH];
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| 366 | if (out == NULL)
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| 367 | return inl + 16;
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| 368 | /* Copy input to output buffer + 8 so we have space for IV */
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| 369 | memmove(out + 8, in, inl);
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| 370 | /* Work out ICV */
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| 371 | SHA1(in, inl, sha1tmp);
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| 372 | memcpy(out + inl + 8, sha1tmp, 8);
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| 373 | OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
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| 374 | /* Generate random IV */
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| 375 | if (RAND_bytes(EVP_CIPHER_CTX_iv_noconst(ctx), 8) <= 0)
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| 376 | return -1;
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| 377 | memcpy(out, EVP_CIPHER_CTX_iv_noconst(ctx), 8);
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| 378 | /* Encrypt everything after IV in place */
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| 379 | des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8);
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| 380 | BUF_reverse(out, NULL, inl + 16);
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| 381 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), wrap_iv, 8);
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| 382 | des_ede_cbc_cipher(ctx, out, out, inl + 16);
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| 383 | return inl + 16;
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| 384 | }
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| 385 |
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| 386 | static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 387 | const unsigned char *in, size_t inl)
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| 388 | {
|
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| 389 | /*
|
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| 390 | * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
|
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| 391 | * is more than will ever be needed. Also input length must be a multiple
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| 392 | * of 8 bits.
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| 393 | */
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| 394 | if (inl >= EVP_MAXCHUNK || inl % 8)
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| 395 | return -1;
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| 396 |
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| 397 | if (is_partially_overlapping(out, in, inl)) {
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| 398 | EVPerr(EVP_F_DES_EDE3_WRAP_CIPHER, EVP_R_PARTIALLY_OVERLAPPING);
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| 399 | return 0;
|
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| 400 | }
|
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| 401 |
|
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| 402 | if (EVP_CIPHER_CTX_encrypting(ctx))
|
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| 403 | return des_ede3_wrap(ctx, out, in, inl);
|
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| 404 | else
|
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| 405 | return des_ede3_unwrap(ctx, out, in, inl);
|
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| 406 | }
|
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| 407 |
|
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| 408 | static const EVP_CIPHER des3_wrap = {
|
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| 409 | NID_id_smime_alg_CMS3DESwrap,
|
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| 410 | 8, 24, 0,
|
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| 411 | EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
|
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| 412 | | EVP_CIPH_FLAG_DEFAULT_ASN1,
|
---|
| 413 | des_ede3_init_key, des_ede3_wrap_cipher,
|
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| 414 | NULL,
|
---|
| 415 | sizeof(DES_EDE_KEY),
|
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| 416 | NULL, NULL, NULL, NULL
|
---|
| 417 | };
|
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| 418 |
|
---|
| 419 | const EVP_CIPHER *EVP_des_ede3_wrap(void)
|
---|
| 420 | {
|
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| 421 | return &des3_wrap;
|
---|
| 422 | }
|
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| 423 |
|
---|
| 424 | #endif
|
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