[331] | 1 | /*
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| 2 | * Copyright 2006-2016 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 <openssl/opensslconf.h>
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| 11 | #ifdef OPENSSL_NO_CAMELLIA
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| 12 | NON_EMPTY_TRANSLATION_UNIT
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| 13 | #else
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| 14 |
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| 15 | # include <openssl/evp.h>
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| 16 | # include <openssl/err.h>
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| 17 | # include <string.h>
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| 18 | # include <assert.h>
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| 19 | # include <openssl/camellia.h>
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| 20 | # include "internal/evp_int.h"
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| 21 | # include "../modes/modes_lcl.h"
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| 22 |
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| 23 | static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 24 | const unsigned char *iv, int enc);
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| 25 |
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| 26 | /* Camellia subkey Structure */
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| 27 | typedef struct {
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| 28 | CAMELLIA_KEY ks;
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| 29 | block128_f block;
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| 30 | union {
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| 31 | cbc128_f cbc;
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| 32 | ctr128_f ctr;
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| 33 | } stream;
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| 34 | } EVP_CAMELLIA_KEY;
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| 35 |
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| 36 | # define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4))
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| 37 |
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| 38 | /* Attribute operation for Camellia */
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| 39 | # define data(ctx) EVP_C_DATA(EVP_CAMELLIA_KEY,ctx)
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| 40 |
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| 41 | # if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
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| 42 | /* ---------^^^ this is not a typo, just a way to detect that
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| 43 | * assembler support was in general requested... */
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| 44 | # include "sparc_arch.h"
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| 45 |
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| 46 | extern unsigned int OPENSSL_sparcv9cap_P[];
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| 47 |
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| 48 | # define SPARC_CMLL_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_CAMELLIA)
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| 49 |
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| 50 | void cmll_t4_set_key(const unsigned char *key, int bits, CAMELLIA_KEY *ks);
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| 51 | void cmll_t4_encrypt(const unsigned char *in, unsigned char *out,
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| 52 | const CAMELLIA_KEY *key);
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| 53 | void cmll_t4_decrypt(const unsigned char *in, unsigned char *out,
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| 54 | const CAMELLIA_KEY *key);
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| 55 |
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| 56 | void cmll128_t4_cbc_encrypt(const unsigned char *in, unsigned char *out,
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| 57 | size_t len, const CAMELLIA_KEY *key,
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| 58 | unsigned char *ivec);
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| 59 | void cmll128_t4_cbc_decrypt(const unsigned char *in, unsigned char *out,
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| 60 | size_t len, const CAMELLIA_KEY *key,
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| 61 | unsigned char *ivec);
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| 62 | void cmll256_t4_cbc_encrypt(const unsigned char *in, unsigned char *out,
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| 63 | size_t len, const CAMELLIA_KEY *key,
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| 64 | unsigned char *ivec);
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| 65 | void cmll256_t4_cbc_decrypt(const unsigned char *in, unsigned char *out,
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| 66 | size_t len, const CAMELLIA_KEY *key,
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| 67 | unsigned char *ivec);
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| 68 | void cmll128_t4_ctr32_encrypt(const unsigned char *in, unsigned char *out,
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| 69 | size_t blocks, const CAMELLIA_KEY *key,
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| 70 | unsigned char *ivec);
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| 71 | void cmll256_t4_ctr32_encrypt(const unsigned char *in, unsigned char *out,
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| 72 | size_t blocks, const CAMELLIA_KEY *key,
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| 73 | unsigned char *ivec);
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| 74 |
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| 75 | static int cmll_t4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 76 | const unsigned char *iv, int enc)
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| 77 | {
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| 78 | int ret, mode, bits;
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| 79 | EVP_CAMELLIA_KEY *dat =
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| 80 | (EVP_CAMELLIA_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx);
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| 81 |
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| 82 | mode = EVP_CIPHER_CTX_mode(ctx);
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| 83 | bits = EVP_CIPHER_CTX_key_length(ctx) * 8;
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| 84 |
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| 85 | cmll_t4_set_key(key, bits, &dat->ks);
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| 86 |
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| 87 | if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
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| 88 | && !enc) {
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| 89 | ret = 0;
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| 90 | dat->block = (block128_f) cmll_t4_decrypt;
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| 91 | switch (bits) {
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| 92 | case 128:
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| 93 | dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
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| 94 | (cbc128_f) cmll128_t4_cbc_decrypt : NULL;
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| 95 | break;
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| 96 | case 192:
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| 97 | case 256:
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| 98 | dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
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| 99 | (cbc128_f) cmll256_t4_cbc_decrypt : NULL;
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| 100 | break;
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| 101 | default:
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| 102 | ret = -1;
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| 103 | }
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| 104 | } else {
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| 105 | ret = 0;
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| 106 | dat->block = (block128_f) cmll_t4_encrypt;
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| 107 | switch (bits) {
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| 108 | case 128:
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| 109 | if (mode == EVP_CIPH_CBC_MODE)
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| 110 | dat->stream.cbc = (cbc128_f) cmll128_t4_cbc_encrypt;
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| 111 | else if (mode == EVP_CIPH_CTR_MODE)
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| 112 | dat->stream.ctr = (ctr128_f) cmll128_t4_ctr32_encrypt;
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| 113 | else
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| 114 | dat->stream.cbc = NULL;
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| 115 | break;
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| 116 | case 192:
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| 117 | case 256:
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| 118 | if (mode == EVP_CIPH_CBC_MODE)
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| 119 | dat->stream.cbc = (cbc128_f) cmll256_t4_cbc_encrypt;
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| 120 | else if (mode == EVP_CIPH_CTR_MODE)
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| 121 | dat->stream.ctr = (ctr128_f) cmll256_t4_ctr32_encrypt;
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| 122 | else
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| 123 | dat->stream.cbc = NULL;
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| 124 | break;
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| 125 | default:
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| 126 | ret = -1;
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| 127 | }
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| 128 | }
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| 129 |
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| 130 | if (ret < 0) {
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| 131 | EVPerr(EVP_F_CMLL_T4_INIT_KEY, EVP_R_CAMELLIA_KEY_SETUP_FAILED);
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| 132 | return 0;
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| 133 | }
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| 134 |
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| 135 | return 1;
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| 136 | }
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| 137 |
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| 138 | # define cmll_t4_cbc_cipher camellia_cbc_cipher
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| 139 | static int cmll_t4_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 140 | const unsigned char *in, size_t len);
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| 141 |
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| 142 | # define cmll_t4_ecb_cipher camellia_ecb_cipher
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| 143 | static int cmll_t4_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 144 | const unsigned char *in, size_t len);
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| 145 |
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| 146 | # define cmll_t4_ofb_cipher camellia_ofb_cipher
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| 147 | static int cmll_t4_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 148 | const unsigned char *in, size_t len);
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| 149 |
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| 150 | # define cmll_t4_cfb_cipher camellia_cfb_cipher
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| 151 | static int cmll_t4_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 152 | const unsigned char *in, size_t len);
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| 153 |
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| 154 | # define cmll_t4_cfb8_cipher camellia_cfb8_cipher
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| 155 | static int cmll_t4_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 156 | const unsigned char *in, size_t len);
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| 157 |
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| 158 | # define cmll_t4_cfb1_cipher camellia_cfb1_cipher
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| 159 | static int cmll_t4_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 160 | const unsigned char *in, size_t len);
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| 161 |
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| 162 | # define cmll_t4_ctr_cipher camellia_ctr_cipher
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| 163 | static int cmll_t4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 164 | const unsigned char *in, size_t len);
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| 165 |
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| 166 | # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
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| 167 | static const EVP_CIPHER cmll_t4_##keylen##_##mode = { \
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| 168 | nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
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| 169 | flags|EVP_CIPH_##MODE##_MODE, \
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| 170 | cmll_t4_init_key, \
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| 171 | cmll_t4_##mode##_cipher, \
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| 172 | NULL, \
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| 173 | sizeof(EVP_CAMELLIA_KEY), \
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| 174 | NULL,NULL,NULL,NULL }; \
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| 175 | static const EVP_CIPHER camellia_##keylen##_##mode = { \
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| 176 | nid##_##keylen##_##nmode,blocksize, \
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| 177 | keylen/8,ivlen, \
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| 178 | flags|EVP_CIPH_##MODE##_MODE, \
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| 179 | camellia_init_key, \
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| 180 | camellia_##mode##_cipher, \
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| 181 | NULL, \
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| 182 | sizeof(EVP_CAMELLIA_KEY), \
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| 183 | NULL,NULL,NULL,NULL }; \
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| 184 | const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
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| 185 | { return SPARC_CMLL_CAPABLE?&cmll_t4_##keylen##_##mode:&camellia_##keylen##_##mode; }
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| 186 |
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| 187 | # else
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| 188 |
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| 189 | # define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
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| 190 | static const EVP_CIPHER camellia_##keylen##_##mode = { \
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| 191 | nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
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| 192 | flags|EVP_CIPH_##MODE##_MODE, \
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| 193 | camellia_init_key, \
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| 194 | camellia_##mode##_cipher, \
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| 195 | NULL, \
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| 196 | sizeof(EVP_CAMELLIA_KEY), \
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| 197 | NULL,NULL,NULL,NULL }; \
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| 198 | const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
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| 199 | { return &camellia_##keylen##_##mode; }
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| 200 |
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| 201 | # endif
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| 202 |
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| 203 | # define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \
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| 204 | BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
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| 205 | BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
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| 206 | BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
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| 207 | BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \
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| 208 | BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \
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| 209 | BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \
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| 210 | BLOCK_CIPHER_generic(nid, keylen, 1, 16, ctr, ctr, CTR, flags)
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| 211 |
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| 212 | /* The subkey for Camellia is generated. */
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| 213 | static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 214 | const unsigned char *iv, int enc)
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| 215 | {
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| 216 | int ret, mode;
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| 217 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 218 |
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| 219 | ret = Camellia_set_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, &dat->ks);
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| 220 | if (ret < 0) {
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| 221 | EVPerr(EVP_F_CAMELLIA_INIT_KEY, EVP_R_CAMELLIA_KEY_SETUP_FAILED);
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| 222 | return 0;
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| 223 | }
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| 224 |
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| 225 | mode = EVP_CIPHER_CTX_mode(ctx);
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| 226 | if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
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| 227 | && !enc) {
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| 228 | dat->block = (block128_f) Camellia_decrypt;
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| 229 | dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
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| 230 | (cbc128_f) Camellia_cbc_encrypt : NULL;
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| 231 | } else {
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| 232 | dat->block = (block128_f) Camellia_encrypt;
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| 233 | dat->stream.cbc = mode == EVP_CIPH_CBC_MODE ?
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| 234 | (cbc128_f) Camellia_cbc_encrypt : NULL;
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| 235 | }
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| 236 |
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| 237 | return 1;
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| 238 | }
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| 239 |
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| 240 | static int camellia_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 241 | const unsigned char *in, size_t len)
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| 242 | {
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| 243 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 244 |
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| 245 | if (dat->stream.cbc)
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| 246 | (*dat->stream.cbc) (in, out, len, &dat->ks,
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| 247 | EVP_CIPHER_CTX_iv_noconst(ctx),
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| 248 | EVP_CIPHER_CTX_encrypting(ctx));
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| 249 | else if (EVP_CIPHER_CTX_encrypting(ctx))
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| 250 | CRYPTO_cbc128_encrypt(in, out, len, &dat->ks,
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| 251 | EVP_CIPHER_CTX_iv_noconst(ctx), dat->block);
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| 252 | else
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| 253 | CRYPTO_cbc128_decrypt(in, out, len, &dat->ks,
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| 254 | EVP_CIPHER_CTX_iv_noconst(ctx), dat->block);
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| 255 |
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| 256 | return 1;
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| 257 | }
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| 258 |
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| 259 | static int camellia_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 260 | const unsigned char *in, size_t len)
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| 261 | {
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| 262 | size_t bl = EVP_CIPHER_CTX_block_size(ctx);
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| 263 | size_t i;
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| 264 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 265 |
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| 266 | if (len < bl)
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| 267 | return 1;
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| 268 |
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| 269 | for (i = 0, len -= bl; i <= len; i += bl)
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| 270 | (*dat->block) (in + i, out + i, &dat->ks);
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| 271 |
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| 272 | return 1;
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| 273 | }
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| 274 |
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| 275 | static int camellia_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 276 | const unsigned char *in, size_t len)
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| 277 | {
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| 278 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 279 |
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| 280 | int num = EVP_CIPHER_CTX_num(ctx);
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| 281 | CRYPTO_ofb128_encrypt(in, out, len, &dat->ks,
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| 282 | EVP_CIPHER_CTX_iv_noconst(ctx), &num, dat->block);
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| 283 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 284 | return 1;
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| 285 | }
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| 286 |
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| 287 | static int camellia_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 288 | const unsigned char *in, size_t len)
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| 289 | {
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| 290 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 291 |
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| 292 | int num = EVP_CIPHER_CTX_num(ctx);
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| 293 | CRYPTO_cfb128_encrypt(in, out, len, &dat->ks,
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| 294 | EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
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| 295 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 296 | return 1;
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| 297 | }
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| 298 |
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| 299 | static int camellia_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 300 | const unsigned char *in, size_t len)
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| 301 | {
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| 302 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 303 |
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| 304 | int num = EVP_CIPHER_CTX_num(ctx);
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| 305 | CRYPTO_cfb128_8_encrypt(in, out, len, &dat->ks,
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| 306 | EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
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| 307 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 308 | return 1;
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| 309 | }
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| 310 |
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| 311 | static int camellia_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 312 | const unsigned char *in, size_t len)
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| 313 | {
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| 314 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 315 |
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| 316 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) {
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| 317 | int num = EVP_CIPHER_CTX_num(ctx);
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| 318 | CRYPTO_cfb128_1_encrypt(in, out, len, &dat->ks,
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| 319 | EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
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| 320 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 321 | return 1;
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| 322 | }
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| 323 |
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| 324 | while (len >= MAXBITCHUNK) {
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| 325 | int num = EVP_CIPHER_CTX_num(ctx);
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| 326 | CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, &dat->ks,
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| 327 | EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
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| 328 | len -= MAXBITCHUNK;
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| 329 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 330 | }
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| 331 | if (len) {
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| 332 | int num = EVP_CIPHER_CTX_num(ctx);
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| 333 | CRYPTO_cfb128_1_encrypt(in, out, len * 8, &dat->ks,
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| 334 | EVP_CIPHER_CTX_iv_noconst(ctx), &num, EVP_CIPHER_CTX_encrypting(ctx), dat->block);
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| 335 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 336 | }
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| 337 |
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| 338 | return 1;
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| 339 | }
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| 340 |
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| 341 | static int camellia_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 342 | const unsigned char *in, size_t len)
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| 343 | {
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| 344 | unsigned int num = EVP_CIPHER_CTX_num(ctx);
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| 345 | EVP_CAMELLIA_KEY *dat = EVP_C_DATA(EVP_CAMELLIA_KEY,ctx);
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| 346 |
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| 347 | if (dat->stream.ctr)
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| 348 | CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks,
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| 349 | EVP_CIPHER_CTX_iv_noconst(ctx),
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| 350 | EVP_CIPHER_CTX_buf_noconst(ctx), &num,
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| 351 | dat->stream.ctr);
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| 352 | else
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| 353 | CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
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| 354 | EVP_CIPHER_CTX_iv_noconst(ctx),
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| 355 | EVP_CIPHER_CTX_buf_noconst(ctx), &num,
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| 356 | dat->block);
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| 357 | EVP_CIPHER_CTX_set_num(ctx, num);
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| 358 | return 1;
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| 359 | }
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| 360 |
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| 361 | BLOCK_CIPHER_generic_pack(NID_camellia, 128, 0)
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| 362 | BLOCK_CIPHER_generic_pack(NID_camellia, 192, 0)
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| 363 | BLOCK_CIPHER_generic_pack(NID_camellia, 256, 0)
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| 364 | #endif
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