1 | /*
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2 | * Copyright 2011-2016 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 |
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12 | #include <stdio.h>
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13 | #include <string.h>
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14 |
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15 | #include <openssl/evp.h>
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16 | #include <openssl/objects.h>
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17 | #include <openssl/aes.h>
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18 | #include <openssl/sha.h>
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19 | #include <openssl/rand.h>
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20 | #include "../modes/modes_lcl.h"
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21 | #include "internal/evp_int.h"
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22 | #include "internal/constant_time_locl.h"
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23 |
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24 | typedef struct {
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25 | AES_KEY ks;
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26 | SHA_CTX head, tail, md;
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27 | size_t payload_length; /* AAD length in decrypt case */
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28 | union {
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29 | unsigned int tls_ver;
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30 | unsigned char tls_aad[16]; /* 13 used */
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31 | } aux;
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32 | } EVP_AES_HMAC_SHA1;
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33 |
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34 | #define NO_PAYLOAD_LENGTH ((size_t)-1)
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35 |
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36 | #if defined(AES_ASM) && ( \
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37 | defined(__x86_64) || defined(__x86_64__) || \
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38 | defined(_M_AMD64) || defined(_M_X64) )
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39 |
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40 | extern unsigned int OPENSSL_ia32cap_P[];
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41 | # define AESNI_CAPABLE (1<<(57-32))
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42 |
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43 | int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
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44 | AES_KEY *key);
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45 | int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
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46 | AES_KEY *key);
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47 |
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48 | void aesni_cbc_encrypt(const unsigned char *in,
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49 | unsigned char *out,
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50 | size_t length,
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51 | const AES_KEY *key, unsigned char *ivec, int enc);
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52 |
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53 | void aesni_cbc_sha1_enc(const void *inp, void *out, size_t blocks,
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54 | const AES_KEY *key, unsigned char iv[16],
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55 | SHA_CTX *ctx, const void *in0);
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56 |
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57 | void aesni256_cbc_sha1_dec(const void *inp, void *out, size_t blocks,
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58 | const AES_KEY *key, unsigned char iv[16],
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59 | SHA_CTX *ctx, const void *in0);
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60 |
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61 | # define data(ctx) ((EVP_AES_HMAC_SHA1 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
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62 |
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63 | static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
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64 | const unsigned char *inkey,
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65 | const unsigned char *iv, int enc)
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66 | {
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67 | EVP_AES_HMAC_SHA1 *key = data(ctx);
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68 | int ret;
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69 |
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70 | if (enc)
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71 | ret = aesni_set_encrypt_key(inkey,
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72 | EVP_CIPHER_CTX_key_length(ctx) * 8,
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73 | &key->ks);
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74 | else
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75 | ret = aesni_set_decrypt_key(inkey,
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76 | EVP_CIPHER_CTX_key_length(ctx) * 8,
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77 | &key->ks);
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78 |
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79 | SHA1_Init(&key->head); /* handy when benchmarking */
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80 | key->tail = key->head;
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81 | key->md = key->head;
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82 |
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83 | key->payload_length = NO_PAYLOAD_LENGTH;
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84 |
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85 | return ret < 0 ? 0 : 1;
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86 | }
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87 |
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88 | # define STITCHED_CALL
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89 | # undef STITCHED_DECRYPT_CALL
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90 |
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91 | # if !defined(STITCHED_CALL)
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92 | # define aes_off 0
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93 | # endif
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94 |
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95 | void sha1_block_data_order(void *c, const void *p, size_t len);
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96 |
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97 | static void sha1_update(SHA_CTX *c, const void *data, size_t len)
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98 | {
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99 | const unsigned char *ptr = data;
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100 | size_t res;
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101 |
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102 | if ((res = c->num)) {
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103 | res = SHA_CBLOCK - res;
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104 | if (len < res)
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105 | res = len;
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106 | SHA1_Update(c, ptr, res);
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107 | ptr += res;
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108 | len -= res;
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109 | }
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110 |
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111 | res = len % SHA_CBLOCK;
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112 | len -= res;
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113 |
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114 | if (len) {
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115 | sha1_block_data_order(c, ptr, len / SHA_CBLOCK);
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116 |
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117 | ptr += len;
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118 | c->Nh += len >> 29;
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119 | c->Nl += len <<= 3;
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120 | if (c->Nl < (unsigned int)len)
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121 | c->Nh++;
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122 | }
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123 |
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124 | if (res)
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125 | SHA1_Update(c, ptr, res);
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126 | }
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127 |
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128 | # ifdef SHA1_Update
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129 | # undef SHA1_Update
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130 | # endif
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131 | # define SHA1_Update sha1_update
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132 |
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133 | # if !defined(OPENSSL_NO_MULTIBLOCK)
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134 |
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135 | typedef struct {
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136 | unsigned int A[8], B[8], C[8], D[8], E[8];
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137 | } SHA1_MB_CTX;
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138 | typedef struct {
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139 | const unsigned char *ptr;
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140 | int blocks;
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141 | } HASH_DESC;
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142 |
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143 | void sha1_multi_block(SHA1_MB_CTX *, const HASH_DESC *, int);
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144 |
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145 | typedef struct {
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146 | const unsigned char *inp;
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147 | unsigned char *out;
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148 | int blocks;
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149 | u64 iv[2];
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150 | } CIPH_DESC;
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151 |
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152 | void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
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153 |
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154 | static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA1 *key,
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155 | unsigned char *out,
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156 | const unsigned char *inp,
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157 | size_t inp_len, int n4x)
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158 | { /* n4x is 1 or 2 */
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159 | HASH_DESC hash_d[8], edges[8];
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160 | CIPH_DESC ciph_d[8];
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161 | unsigned char storage[sizeof(SHA1_MB_CTX) + 32];
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162 | union {
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163 | u64 q[16];
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164 | u32 d[32];
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165 | u8 c[128];
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166 | } blocks[8];
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167 | SHA1_MB_CTX *ctx;
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168 | unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
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169 | 0;
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170 | size_t ret = 0;
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171 | u8 *IVs;
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172 | # if defined(BSWAP8)
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173 | u64 seqnum;
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174 | # endif
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175 |
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176 | /* ask for IVs in bulk */
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177 | if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
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178 | return 0;
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179 |
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180 | ctx = (SHA1_MB_CTX *) (storage + 32 - ((size_t)storage % 32)); /* align */
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181 |
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182 | frag = (unsigned int)inp_len >> (1 + n4x);
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183 | last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
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184 | if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
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185 | frag++;
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186 | last -= x4 - 1;
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187 | }
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188 |
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189 | packlen = 5 + 16 + ((frag + 20 + 16) & -16);
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190 |
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191 | /* populate descriptors with pointers and IVs */
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192 | hash_d[0].ptr = inp;
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193 | ciph_d[0].inp = inp;
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194 | /* 5+16 is place for header and explicit IV */
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195 | ciph_d[0].out = out + 5 + 16;
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196 | memcpy(ciph_d[0].out - 16, IVs, 16);
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197 | memcpy(ciph_d[0].iv, IVs, 16);
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198 | IVs += 16;
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199 |
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200 | for (i = 1; i < x4; i++) {
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201 | ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
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202 | ciph_d[i].out = ciph_d[i - 1].out + packlen;
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203 | memcpy(ciph_d[i].out - 16, IVs, 16);
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204 | memcpy(ciph_d[i].iv, IVs, 16);
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205 | IVs += 16;
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206 | }
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207 |
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208 | # if defined(BSWAP8)
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209 | memcpy(blocks[0].c, key->md.data, 8);
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210 | seqnum = BSWAP8(blocks[0].q[0]);
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211 | # endif
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212 | for (i = 0; i < x4; i++) {
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213 | unsigned int len = (i == (x4 - 1) ? last : frag);
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214 | # if !defined(BSWAP8)
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215 | unsigned int carry, j;
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216 | # endif
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217 |
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218 | ctx->A[i] = key->md.h0;
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219 | ctx->B[i] = key->md.h1;
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220 | ctx->C[i] = key->md.h2;
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221 | ctx->D[i] = key->md.h3;
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222 | ctx->E[i] = key->md.h4;
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223 |
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224 | /* fix seqnum */
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225 | # if defined(BSWAP8)
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226 | blocks[i].q[0] = BSWAP8(seqnum + i);
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227 | # else
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228 | for (carry = i, j = 8; j--;) {
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229 | blocks[i].c[j] = ((u8 *)key->md.data)[j] + carry;
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230 | carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
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231 | }
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232 | # endif
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233 | blocks[i].c[8] = ((u8 *)key->md.data)[8];
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234 | blocks[i].c[9] = ((u8 *)key->md.data)[9];
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235 | blocks[i].c[10] = ((u8 *)key->md.data)[10];
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236 | /* fix length */
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237 | blocks[i].c[11] = (u8)(len >> 8);
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238 | blocks[i].c[12] = (u8)(len);
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239 |
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240 | memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
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241 | hash_d[i].ptr += 64 - 13;
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242 | hash_d[i].blocks = (len - (64 - 13)) / 64;
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243 |
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244 | edges[i].ptr = blocks[i].c;
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245 | edges[i].blocks = 1;
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246 | }
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247 |
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248 | /* hash 13-byte headers and first 64-13 bytes of inputs */
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249 | sha1_multi_block(ctx, edges, n4x);
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250 | /* hash bulk inputs */
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251 | # define MAXCHUNKSIZE 2048
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252 | # if MAXCHUNKSIZE%64
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253 | # error "MAXCHUNKSIZE is not divisible by 64"
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254 | # elif MAXCHUNKSIZE
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255 | /*
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256 | * goal is to minimize pressure on L1 cache by moving in shorter steps,
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257 | * so that hashed data is still in the cache by the time we encrypt it
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258 | */
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259 | minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
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260 | if (minblocks > MAXCHUNKSIZE / 64) {
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261 | for (i = 0; i < x4; i++) {
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262 | edges[i].ptr = hash_d[i].ptr;
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263 | edges[i].blocks = MAXCHUNKSIZE / 64;
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264 | ciph_d[i].blocks = MAXCHUNKSIZE / 16;
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265 | }
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266 | do {
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267 | sha1_multi_block(ctx, edges, n4x);
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268 | aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
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269 |
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270 | for (i = 0; i < x4; i++) {
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271 | edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
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272 | hash_d[i].blocks -= MAXCHUNKSIZE / 64;
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273 | edges[i].blocks = MAXCHUNKSIZE / 64;
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274 | ciph_d[i].inp += MAXCHUNKSIZE;
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275 | ciph_d[i].out += MAXCHUNKSIZE;
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276 | ciph_d[i].blocks = MAXCHUNKSIZE / 16;
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277 | memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
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278 | }
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279 | processed += MAXCHUNKSIZE;
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280 | minblocks -= MAXCHUNKSIZE / 64;
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281 | } while (minblocks > MAXCHUNKSIZE / 64);
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282 | }
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283 | # endif
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284 | # undef MAXCHUNKSIZE
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285 | sha1_multi_block(ctx, hash_d, n4x);
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286 |
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287 | memset(blocks, 0, sizeof(blocks));
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288 | for (i = 0; i < x4; i++) {
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289 | unsigned int len = (i == (x4 - 1) ? last : frag),
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290 | off = hash_d[i].blocks * 64;
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291 | const unsigned char *ptr = hash_d[i].ptr + off;
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292 |
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293 | off = (len - processed) - (64 - 13) - off; /* remainder actually */
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294 | memcpy(blocks[i].c, ptr, off);
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295 | blocks[i].c[off] = 0x80;
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296 | len += 64 + 13; /* 64 is HMAC header */
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297 | len *= 8; /* convert to bits */
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298 | if (off < (64 - 8)) {
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299 | # ifdef BSWAP4
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300 | blocks[i].d[15] = BSWAP4(len);
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301 | # else
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302 | PUTU32(blocks[i].c + 60, len);
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303 | # endif
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304 | edges[i].blocks = 1;
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305 | } else {
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306 | # ifdef BSWAP4
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307 | blocks[i].d[31] = BSWAP4(len);
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308 | # else
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309 | PUTU32(blocks[i].c + 124, len);
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310 | # endif
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311 | edges[i].blocks = 2;
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312 | }
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313 | edges[i].ptr = blocks[i].c;
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314 | }
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315 |
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316 | /* hash input tails and finalize */
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317 | sha1_multi_block(ctx, edges, n4x);
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318 |
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319 | memset(blocks, 0, sizeof(blocks));
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320 | for (i = 0; i < x4; i++) {
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321 | # ifdef BSWAP4
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322 | blocks[i].d[0] = BSWAP4(ctx->A[i]);
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323 | ctx->A[i] = key->tail.h0;
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324 | blocks[i].d[1] = BSWAP4(ctx->B[i]);
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325 | ctx->B[i] = key->tail.h1;
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326 | blocks[i].d[2] = BSWAP4(ctx->C[i]);
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327 | ctx->C[i] = key->tail.h2;
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328 | blocks[i].d[3] = BSWAP4(ctx->D[i]);
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329 | ctx->D[i] = key->tail.h3;
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330 | blocks[i].d[4] = BSWAP4(ctx->E[i]);
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331 | ctx->E[i] = key->tail.h4;
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332 | blocks[i].c[20] = 0x80;
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333 | blocks[i].d[15] = BSWAP4((64 + 20) * 8);
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334 | # else
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335 | PUTU32(blocks[i].c + 0, ctx->A[i]);
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336 | ctx->A[i] = key->tail.h0;
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337 | PUTU32(blocks[i].c + 4, ctx->B[i]);
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338 | ctx->B[i] = key->tail.h1;
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339 | PUTU32(blocks[i].c + 8, ctx->C[i]);
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340 | ctx->C[i] = key->tail.h2;
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341 | PUTU32(blocks[i].c + 12, ctx->D[i]);
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342 | ctx->D[i] = key->tail.h3;
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343 | PUTU32(blocks[i].c + 16, ctx->E[i]);
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344 | ctx->E[i] = key->tail.h4;
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345 | blocks[i].c[20] = 0x80;
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346 | PUTU32(blocks[i].c + 60, (64 + 20) * 8);
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347 | # endif
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348 | edges[i].ptr = blocks[i].c;
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349 | edges[i].blocks = 1;
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350 | }
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351 |
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352 | /* finalize MACs */
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353 | sha1_multi_block(ctx, edges, n4x);
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354 |
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355 | for (i = 0; i < x4; i++) {
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356 | unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
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357 | unsigned char *out0 = out;
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358 |
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359 | memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
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360 | ciph_d[i].inp = ciph_d[i].out;
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361 |
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362 | out += 5 + 16 + len;
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363 |
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364 | /* write MAC */
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365 | PUTU32(out + 0, ctx->A[i]);
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366 | PUTU32(out + 4, ctx->B[i]);
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367 | PUTU32(out + 8, ctx->C[i]);
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368 | PUTU32(out + 12, ctx->D[i]);
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369 | PUTU32(out + 16, ctx->E[i]);
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370 | out += 20;
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371 | len += 20;
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372 |
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373 | /* pad */
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374 | pad = 15 - len % 16;
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375 | for (j = 0; j <= pad; j++)
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376 | *(out++) = pad;
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377 | len += pad + 1;
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378 |
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379 | ciph_d[i].blocks = (len - processed) / 16;
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380 | len += 16; /* account for explicit iv */
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381 |
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382 | /* arrange header */
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383 | out0[0] = ((u8 *)key->md.data)[8];
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384 | out0[1] = ((u8 *)key->md.data)[9];
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385 | out0[2] = ((u8 *)key->md.data)[10];
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386 | out0[3] = (u8)(len >> 8);
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387 | out0[4] = (u8)(len);
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388 |
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389 | ret += len + 5;
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390 | inp += frag;
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391 | }
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392 |
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393 | aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
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394 |
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395 | OPENSSL_cleanse(blocks, sizeof(blocks));
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396 | OPENSSL_cleanse(ctx, sizeof(*ctx));
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397 |
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398 | return ret;
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399 | }
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400 | # endif
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401 |
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402 | static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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403 | const unsigned char *in, size_t len)
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404 | {
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405 | EVP_AES_HMAC_SHA1 *key = data(ctx);
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406 | unsigned int l;
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407 | size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
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408 | * later */
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409 | sha_off = 0;
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410 | # if defined(STITCHED_CALL)
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411 | size_t aes_off = 0, blocks;
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412 |
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413 | sha_off = SHA_CBLOCK - key->md.num;
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414 | # endif
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415 |
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416 | key->payload_length = NO_PAYLOAD_LENGTH;
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417 |
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418 | if (len % AES_BLOCK_SIZE)
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419 | return 0;
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420 |
|
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421 | if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
---|
422 | if (plen == NO_PAYLOAD_LENGTH)
|
---|
423 | plen = len;
|
---|
424 | else if (len !=
|
---|
425 | ((plen + SHA_DIGEST_LENGTH +
|
---|
426 | AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
|
---|
427 | return 0;
|
---|
428 | else if (key->aux.tls_ver >= TLS1_1_VERSION)
|
---|
429 | iv = AES_BLOCK_SIZE;
|
---|
430 |
|
---|
431 | # if defined(STITCHED_CALL)
|
---|
432 | if (plen > (sha_off + iv)
|
---|
433 | && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
|
---|
434 | SHA1_Update(&key->md, in + iv, sha_off);
|
---|
435 |
|
---|
436 | aesni_cbc_sha1_enc(in, out, blocks, &key->ks,
|
---|
437 | EVP_CIPHER_CTX_iv_noconst(ctx),
|
---|
438 | &key->md, in + iv + sha_off);
|
---|
439 | blocks *= SHA_CBLOCK;
|
---|
440 | aes_off += blocks;
|
---|
441 | sha_off += blocks;
|
---|
442 | key->md.Nh += blocks >> 29;
|
---|
443 | key->md.Nl += blocks <<= 3;
|
---|
444 | if (key->md.Nl < (unsigned int)blocks)
|
---|
445 | key->md.Nh++;
|
---|
446 | } else {
|
---|
447 | sha_off = 0;
|
---|
448 | }
|
---|
449 | # endif
|
---|
450 | sha_off += iv;
|
---|
451 | SHA1_Update(&key->md, in + sha_off, plen - sha_off);
|
---|
452 |
|
---|
453 | if (plen != len) { /* "TLS" mode of operation */
|
---|
454 | if (in != out)
|
---|
455 | memcpy(out + aes_off, in + aes_off, plen - aes_off);
|
---|
456 |
|
---|
457 | /* calculate HMAC and append it to payload */
|
---|
458 | SHA1_Final(out + plen, &key->md);
|
---|
459 | key->md = key->tail;
|
---|
460 | SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
|
---|
461 | SHA1_Final(out + plen, &key->md);
|
---|
462 |
|
---|
463 | /* pad the payload|hmac */
|
---|
464 | plen += SHA_DIGEST_LENGTH;
|
---|
465 | for (l = len - plen - 1; plen < len; plen++)
|
---|
466 | out[plen] = l;
|
---|
467 | /* encrypt HMAC|padding at once */
|
---|
468 | aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
|
---|
469 | &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
|
---|
470 | } else {
|
---|
471 | aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
|
---|
472 | &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
|
---|
473 | }
|
---|
474 | } else {
|
---|
475 | union {
|
---|
476 | unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
|
---|
477 | unsigned char c[32 + SHA_DIGEST_LENGTH];
|
---|
478 | } mac, *pmac;
|
---|
479 |
|
---|
480 | /* arrange cache line alignment */
|
---|
481 | pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
|
---|
482 |
|
---|
483 | if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
|
---|
484 | size_t inp_len, mask, j, i;
|
---|
485 | unsigned int res, maxpad, pad, bitlen;
|
---|
486 | int ret = 1;
|
---|
487 | union {
|
---|
488 | unsigned int u[SHA_LBLOCK];
|
---|
489 | unsigned char c[SHA_CBLOCK];
|
---|
490 | } *data = (void *)key->md.data;
|
---|
491 | # if defined(STITCHED_DECRYPT_CALL)
|
---|
492 | unsigned char tail_iv[AES_BLOCK_SIZE];
|
---|
493 | int stitch = 0;
|
---|
494 | # endif
|
---|
495 |
|
---|
496 | if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
|
---|
497 | >= TLS1_1_VERSION) {
|
---|
498 | if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1))
|
---|
499 | return 0;
|
---|
500 |
|
---|
501 | /* omit explicit iv */
|
---|
502 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), in, AES_BLOCK_SIZE);
|
---|
503 |
|
---|
504 | in += AES_BLOCK_SIZE;
|
---|
505 | out += AES_BLOCK_SIZE;
|
---|
506 | len -= AES_BLOCK_SIZE;
|
---|
507 | } else if (len < (SHA_DIGEST_LENGTH + 1))
|
---|
508 | return 0;
|
---|
509 |
|
---|
510 | # if defined(STITCHED_DECRYPT_CALL)
|
---|
511 | if (len >= 1024 && ctx->key_len == 32) {
|
---|
512 | /* decrypt last block */
|
---|
513 | memcpy(tail_iv, in + len - 2 * AES_BLOCK_SIZE,
|
---|
514 | AES_BLOCK_SIZE);
|
---|
515 | aesni_cbc_encrypt(in + len - AES_BLOCK_SIZE,
|
---|
516 | out + len - AES_BLOCK_SIZE, AES_BLOCK_SIZE,
|
---|
517 | &key->ks, tail_iv, 0);
|
---|
518 | stitch = 1;
|
---|
519 | } else
|
---|
520 | # endif
|
---|
521 | /* decrypt HMAC|padding at once */
|
---|
522 | aesni_cbc_encrypt(in, out, len, &key->ks,
|
---|
523 | EVP_CIPHER_CTX_iv_noconst(ctx), 0);
|
---|
524 |
|
---|
525 | /* figure out payload length */
|
---|
526 | pad = out[len - 1];
|
---|
527 | maxpad = len - (SHA_DIGEST_LENGTH + 1);
|
---|
528 | maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
|
---|
529 | maxpad &= 255;
|
---|
530 |
|
---|
531 | ret &= constant_time_ge(maxpad, pad);
|
---|
532 |
|
---|
533 | inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
|
---|
534 | mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
|
---|
535 | inp_len &= mask;
|
---|
536 | ret &= (int)mask;
|
---|
537 |
|
---|
538 | key->aux.tls_aad[plen - 2] = inp_len >> 8;
|
---|
539 | key->aux.tls_aad[plen - 1] = inp_len;
|
---|
540 |
|
---|
541 | /* calculate HMAC */
|
---|
542 | key->md = key->head;
|
---|
543 | SHA1_Update(&key->md, key->aux.tls_aad, plen);
|
---|
544 |
|
---|
545 | # if defined(STITCHED_DECRYPT_CALL)
|
---|
546 | if (stitch) {
|
---|
547 | blocks = (len - (256 + 32 + SHA_CBLOCK)) / SHA_CBLOCK;
|
---|
548 | aes_off = len - AES_BLOCK_SIZE - blocks * SHA_CBLOCK;
|
---|
549 | sha_off = SHA_CBLOCK - plen;
|
---|
550 |
|
---|
551 | aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
|
---|
552 |
|
---|
553 | SHA1_Update(&key->md, out, sha_off);
|
---|
554 | aesni256_cbc_sha1_dec(in + aes_off,
|
---|
555 | out + aes_off, blocks, &key->ks,
|
---|
556 | ctx->iv, &key->md, out + sha_off);
|
---|
557 |
|
---|
558 | sha_off += blocks *= SHA_CBLOCK;
|
---|
559 | out += sha_off;
|
---|
560 | len -= sha_off;
|
---|
561 | inp_len -= sha_off;
|
---|
562 |
|
---|
563 | key->md.Nl += (blocks << 3); /* at most 18 bits */
|
---|
564 | memcpy(ctx->iv, tail_iv, AES_BLOCK_SIZE);
|
---|
565 | }
|
---|
566 | # endif
|
---|
567 |
|
---|
568 | # if 1
|
---|
569 | len -= SHA_DIGEST_LENGTH; /* amend mac */
|
---|
570 | if (len >= (256 + SHA_CBLOCK)) {
|
---|
571 | j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
|
---|
572 | j += SHA_CBLOCK - key->md.num;
|
---|
573 | SHA1_Update(&key->md, out, j);
|
---|
574 | out += j;
|
---|
575 | len -= j;
|
---|
576 | inp_len -= j;
|
---|
577 | }
|
---|
578 |
|
---|
579 | /* but pretend as if we hashed padded payload */
|
---|
580 | bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
|
---|
581 | # ifdef BSWAP4
|
---|
582 | bitlen = BSWAP4(bitlen);
|
---|
583 | # else
|
---|
584 | mac.c[0] = 0;
|
---|
585 | mac.c[1] = (unsigned char)(bitlen >> 16);
|
---|
586 | mac.c[2] = (unsigned char)(bitlen >> 8);
|
---|
587 | mac.c[3] = (unsigned char)bitlen;
|
---|
588 | bitlen = mac.u[0];
|
---|
589 | # endif
|
---|
590 |
|
---|
591 | pmac->u[0] = 0;
|
---|
592 | pmac->u[1] = 0;
|
---|
593 | pmac->u[2] = 0;
|
---|
594 | pmac->u[3] = 0;
|
---|
595 | pmac->u[4] = 0;
|
---|
596 |
|
---|
597 | for (res = key->md.num, j = 0; j < len; j++) {
|
---|
598 | size_t c = out[j];
|
---|
599 | mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
|
---|
600 | c &= mask;
|
---|
601 | c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
|
---|
602 | data->c[res++] = (unsigned char)c;
|
---|
603 |
|
---|
604 | if (res != SHA_CBLOCK)
|
---|
605 | continue;
|
---|
606 |
|
---|
607 | /* j is not incremented yet */
|
---|
608 | mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
|
---|
609 | data->u[SHA_LBLOCK - 1] |= bitlen & mask;
|
---|
610 | sha1_block_data_order(&key->md, data, 1);
|
---|
611 | mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
|
---|
612 | pmac->u[0] |= key->md.h0 & mask;
|
---|
613 | pmac->u[1] |= key->md.h1 & mask;
|
---|
614 | pmac->u[2] |= key->md.h2 & mask;
|
---|
615 | pmac->u[3] |= key->md.h3 & mask;
|
---|
616 | pmac->u[4] |= key->md.h4 & mask;
|
---|
617 | res = 0;
|
---|
618 | }
|
---|
619 |
|
---|
620 | for (i = res; i < SHA_CBLOCK; i++, j++)
|
---|
621 | data->c[i] = 0;
|
---|
622 |
|
---|
623 | if (res > SHA_CBLOCK - 8) {
|
---|
624 | mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
|
---|
625 | data->u[SHA_LBLOCK - 1] |= bitlen & mask;
|
---|
626 | sha1_block_data_order(&key->md, data, 1);
|
---|
627 | mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
|
---|
628 | pmac->u[0] |= key->md.h0 & mask;
|
---|
629 | pmac->u[1] |= key->md.h1 & mask;
|
---|
630 | pmac->u[2] |= key->md.h2 & mask;
|
---|
631 | pmac->u[3] |= key->md.h3 & mask;
|
---|
632 | pmac->u[4] |= key->md.h4 & mask;
|
---|
633 |
|
---|
634 | memset(data, 0, SHA_CBLOCK);
|
---|
635 | j += 64;
|
---|
636 | }
|
---|
637 | data->u[SHA_LBLOCK - 1] = bitlen;
|
---|
638 | sha1_block_data_order(&key->md, data, 1);
|
---|
639 | mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
|
---|
640 | pmac->u[0] |= key->md.h0 & mask;
|
---|
641 | pmac->u[1] |= key->md.h1 & mask;
|
---|
642 | pmac->u[2] |= key->md.h2 & mask;
|
---|
643 | pmac->u[3] |= key->md.h3 & mask;
|
---|
644 | pmac->u[4] |= key->md.h4 & mask;
|
---|
645 |
|
---|
646 | # ifdef BSWAP4
|
---|
647 | pmac->u[0] = BSWAP4(pmac->u[0]);
|
---|
648 | pmac->u[1] = BSWAP4(pmac->u[1]);
|
---|
649 | pmac->u[2] = BSWAP4(pmac->u[2]);
|
---|
650 | pmac->u[3] = BSWAP4(pmac->u[3]);
|
---|
651 | pmac->u[4] = BSWAP4(pmac->u[4]);
|
---|
652 | # else
|
---|
653 | for (i = 0; i < 5; i++) {
|
---|
654 | res = pmac->u[i];
|
---|
655 | pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
|
---|
656 | pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
|
---|
657 | pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
|
---|
658 | pmac->c[4 * i + 3] = (unsigned char)res;
|
---|
659 | }
|
---|
660 | # endif
|
---|
661 | len += SHA_DIGEST_LENGTH;
|
---|
662 | # else
|
---|
663 | SHA1_Update(&key->md, out, inp_len);
|
---|
664 | res = key->md.num;
|
---|
665 | SHA1_Final(pmac->c, &key->md);
|
---|
666 |
|
---|
667 | {
|
---|
668 | unsigned int inp_blocks, pad_blocks;
|
---|
669 |
|
---|
670 | /* but pretend as if we hashed padded payload */
|
---|
671 | inp_blocks =
|
---|
672 | 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
|
---|
673 | res += (unsigned int)(len - inp_len);
|
---|
674 | pad_blocks = res / SHA_CBLOCK;
|
---|
675 | res %= SHA_CBLOCK;
|
---|
676 | pad_blocks +=
|
---|
677 | 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
|
---|
678 | for (; inp_blocks < pad_blocks; inp_blocks++)
|
---|
679 | sha1_block_data_order(&key->md, data, 1);
|
---|
680 | }
|
---|
681 | # endif
|
---|
682 | key->md = key->tail;
|
---|
683 | SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
|
---|
684 | SHA1_Final(pmac->c, &key->md);
|
---|
685 |
|
---|
686 | /* verify HMAC */
|
---|
687 | out += inp_len;
|
---|
688 | len -= inp_len;
|
---|
689 | # if 1
|
---|
690 | {
|
---|
691 | unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
|
---|
692 | size_t off = out - p;
|
---|
693 | unsigned int c, cmask;
|
---|
694 |
|
---|
695 | maxpad += SHA_DIGEST_LENGTH;
|
---|
696 | for (res = 0, i = 0, j = 0; j < maxpad; j++) {
|
---|
697 | c = p[j];
|
---|
698 | cmask =
|
---|
699 | ((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) *
|
---|
700 | 8 - 1);
|
---|
701 | res |= (c ^ pad) & ~cmask; /* ... and padding */
|
---|
702 | cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
|
---|
703 | res |= (c ^ pmac->c[i]) & cmask;
|
---|
704 | i += 1 & cmask;
|
---|
705 | }
|
---|
706 | maxpad -= SHA_DIGEST_LENGTH;
|
---|
707 |
|
---|
708 | res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
|
---|
709 | ret &= (int)~res;
|
---|
710 | }
|
---|
711 | # else
|
---|
712 | for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
|
---|
713 | res |= out[i] ^ pmac->c[i];
|
---|
714 | res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
|
---|
715 | ret &= (int)~res;
|
---|
716 |
|
---|
717 | /* verify padding */
|
---|
718 | pad = (pad & ~res) | (maxpad & res);
|
---|
719 | out = out + len - 1 - pad;
|
---|
720 | for (res = 0, i = 0; i < pad; i++)
|
---|
721 | res |= out[i] ^ pad;
|
---|
722 |
|
---|
723 | res = (0 - res) >> (sizeof(res) * 8 - 1);
|
---|
724 | ret &= (int)~res;
|
---|
725 | # endif
|
---|
726 | return ret;
|
---|
727 | } else {
|
---|
728 | # if defined(STITCHED_DECRYPT_CALL)
|
---|
729 | if (len >= 1024 && ctx->key_len == 32) {
|
---|
730 | if (sha_off %= SHA_CBLOCK)
|
---|
731 | blocks = (len - 3 * SHA_CBLOCK) / SHA_CBLOCK;
|
---|
732 | else
|
---|
733 | blocks = (len - 2 * SHA_CBLOCK) / SHA_CBLOCK;
|
---|
734 | aes_off = len - blocks * SHA_CBLOCK;
|
---|
735 |
|
---|
736 | aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
|
---|
737 | SHA1_Update(&key->md, out, sha_off);
|
---|
738 | aesni256_cbc_sha1_dec(in + aes_off,
|
---|
739 | out + aes_off, blocks, &key->ks,
|
---|
740 | ctx->iv, &key->md, out + sha_off);
|
---|
741 |
|
---|
742 | sha_off += blocks *= SHA_CBLOCK;
|
---|
743 | out += sha_off;
|
---|
744 | len -= sha_off;
|
---|
745 |
|
---|
746 | key->md.Nh += blocks >> 29;
|
---|
747 | key->md.Nl += blocks <<= 3;
|
---|
748 | if (key->md.Nl < (unsigned int)blocks)
|
---|
749 | key->md.Nh++;
|
---|
750 | } else
|
---|
751 | # endif
|
---|
752 | /* decrypt HMAC|padding at once */
|
---|
753 | aesni_cbc_encrypt(in, out, len, &key->ks,
|
---|
754 | EVP_CIPHER_CTX_iv_noconst(ctx), 0);
|
---|
755 |
|
---|
756 | SHA1_Update(&key->md, out, len);
|
---|
757 | }
|
---|
758 | }
|
---|
759 |
|
---|
760 | return 1;
|
---|
761 | }
|
---|
762 |
|
---|
763 | static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
|
---|
764 | void *ptr)
|
---|
765 | {
|
---|
766 | EVP_AES_HMAC_SHA1 *key = data(ctx);
|
---|
767 |
|
---|
768 | switch (type) {
|
---|
769 | case EVP_CTRL_AEAD_SET_MAC_KEY:
|
---|
770 | {
|
---|
771 | unsigned int i;
|
---|
772 | unsigned char hmac_key[64];
|
---|
773 |
|
---|
774 | memset(hmac_key, 0, sizeof(hmac_key));
|
---|
775 |
|
---|
776 | if (arg > (int)sizeof(hmac_key)) {
|
---|
777 | SHA1_Init(&key->head);
|
---|
778 | SHA1_Update(&key->head, ptr, arg);
|
---|
779 | SHA1_Final(hmac_key, &key->head);
|
---|
780 | } else {
|
---|
781 | memcpy(hmac_key, ptr, arg);
|
---|
782 | }
|
---|
783 |
|
---|
784 | for (i = 0; i < sizeof(hmac_key); i++)
|
---|
785 | hmac_key[i] ^= 0x36; /* ipad */
|
---|
786 | SHA1_Init(&key->head);
|
---|
787 | SHA1_Update(&key->head, hmac_key, sizeof(hmac_key));
|
---|
788 |
|
---|
789 | for (i = 0; i < sizeof(hmac_key); i++)
|
---|
790 | hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
|
---|
791 | SHA1_Init(&key->tail);
|
---|
792 | SHA1_Update(&key->tail, hmac_key, sizeof(hmac_key));
|
---|
793 |
|
---|
794 | OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
|
---|
795 |
|
---|
796 | return 1;
|
---|
797 | }
|
---|
798 | case EVP_CTRL_AEAD_TLS1_AAD:
|
---|
799 | {
|
---|
800 | unsigned char *p = ptr;
|
---|
801 | unsigned int len;
|
---|
802 |
|
---|
803 | if (arg != EVP_AEAD_TLS1_AAD_LEN)
|
---|
804 | return -1;
|
---|
805 |
|
---|
806 | len = p[arg - 2] << 8 | p[arg - 1];
|
---|
807 |
|
---|
808 | if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
---|
809 | key->payload_length = len;
|
---|
810 | if ((key->aux.tls_ver =
|
---|
811 | p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
|
---|
812 | len -= AES_BLOCK_SIZE;
|
---|
813 | p[arg - 2] = len >> 8;
|
---|
814 | p[arg - 1] = len;
|
---|
815 | }
|
---|
816 | key->md = key->head;
|
---|
817 | SHA1_Update(&key->md, p, arg);
|
---|
818 |
|
---|
819 | return (int)(((len + SHA_DIGEST_LENGTH +
|
---|
820 | AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
|
---|
821 | - len);
|
---|
822 | } else {
|
---|
823 | memcpy(key->aux.tls_aad, ptr, arg);
|
---|
824 | key->payload_length = arg;
|
---|
825 |
|
---|
826 | return SHA_DIGEST_LENGTH;
|
---|
827 | }
|
---|
828 | }
|
---|
829 | # if !defined(OPENSSL_NO_MULTIBLOCK)
|
---|
830 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
|
---|
831 | return (int)(5 + 16 + ((arg + 20 + 16) & -16));
|
---|
832 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
|
---|
833 | {
|
---|
834 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
|
---|
835 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
|
---|
836 | unsigned int n4x = 1, x4;
|
---|
837 | unsigned int frag, last, packlen, inp_len;
|
---|
838 |
|
---|
839 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
|
---|
840 | return -1;
|
---|
841 |
|
---|
842 | inp_len = param->inp[11] << 8 | param->inp[12];
|
---|
843 |
|
---|
844 | if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
---|
845 | if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
|
---|
846 | return -1;
|
---|
847 |
|
---|
848 | if (inp_len) {
|
---|
849 | if (inp_len < 4096)
|
---|
850 | return 0; /* too short */
|
---|
851 |
|
---|
852 | if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
|
---|
853 | n4x = 2; /* AVX2 */
|
---|
854 | } else if ((n4x = param->interleave / 4) && n4x <= 2)
|
---|
855 | inp_len = param->len;
|
---|
856 | else
|
---|
857 | return -1;
|
---|
858 |
|
---|
859 | key->md = key->head;
|
---|
860 | SHA1_Update(&key->md, param->inp, 13);
|
---|
861 |
|
---|
862 | x4 = 4 * n4x;
|
---|
863 | n4x += 1;
|
---|
864 |
|
---|
865 | frag = inp_len >> n4x;
|
---|
866 | last = inp_len + frag - (frag << n4x);
|
---|
867 | if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
|
---|
868 | frag++;
|
---|
869 | last -= x4 - 1;
|
---|
870 | }
|
---|
871 |
|
---|
872 | packlen = 5 + 16 + ((frag + 20 + 16) & -16);
|
---|
873 | packlen = (packlen << n4x) - packlen;
|
---|
874 | packlen += 5 + 16 + ((last + 20 + 16) & -16);
|
---|
875 |
|
---|
876 | param->interleave = x4;
|
---|
877 |
|
---|
878 | return (int)packlen;
|
---|
879 | } else
|
---|
880 | return -1; /* not yet */
|
---|
881 | }
|
---|
882 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
|
---|
883 | {
|
---|
884 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
|
---|
885 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
|
---|
886 |
|
---|
887 | return (int)tls1_1_multi_block_encrypt(key, param->out,
|
---|
888 | param->inp, param->len,
|
---|
889 | param->interleave / 4);
|
---|
890 | }
|
---|
891 | case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
|
---|
892 | # endif
|
---|
893 | default:
|
---|
894 | return -1;
|
---|
895 | }
|
---|
896 | }
|
---|
897 |
|
---|
898 | static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = {
|
---|
899 | # ifdef NID_aes_128_cbc_hmac_sha1
|
---|
900 | NID_aes_128_cbc_hmac_sha1,
|
---|
901 | # else
|
---|
902 | NID_undef,
|
---|
903 | # endif
|
---|
904 | AES_BLOCK_SIZE, 16, AES_BLOCK_SIZE,
|
---|
905 | EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
|
---|
906 | EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
|
---|
907 | aesni_cbc_hmac_sha1_init_key,
|
---|
908 | aesni_cbc_hmac_sha1_cipher,
|
---|
909 | NULL,
|
---|
910 | sizeof(EVP_AES_HMAC_SHA1),
|
---|
911 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
|
---|
912 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
|
---|
913 | aesni_cbc_hmac_sha1_ctrl,
|
---|
914 | NULL
|
---|
915 | };
|
---|
916 |
|
---|
917 | static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = {
|
---|
918 | # ifdef NID_aes_256_cbc_hmac_sha1
|
---|
919 | NID_aes_256_cbc_hmac_sha1,
|
---|
920 | # else
|
---|
921 | NID_undef,
|
---|
922 | # endif
|
---|
923 | AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
|
---|
924 | EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
|
---|
925 | EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
|
---|
926 | aesni_cbc_hmac_sha1_init_key,
|
---|
927 | aesni_cbc_hmac_sha1_cipher,
|
---|
928 | NULL,
|
---|
929 | sizeof(EVP_AES_HMAC_SHA1),
|
---|
930 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
|
---|
931 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
|
---|
932 | aesni_cbc_hmac_sha1_ctrl,
|
---|
933 | NULL
|
---|
934 | };
|
---|
935 |
|
---|
936 | const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
|
---|
937 | {
|
---|
938 | return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
|
---|
939 | &aesni_128_cbc_hmac_sha1_cipher : NULL);
|
---|
940 | }
|
---|
941 |
|
---|
942 | const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
|
---|
943 | {
|
---|
944 | return (OPENSSL_ia32cap_P[1] & AESNI_CAPABLE ?
|
---|
945 | &aesni_256_cbc_hmac_sha1_cipher : NULL);
|
---|
946 | }
|
---|
947 | #else
|
---|
948 | const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void)
|
---|
949 | {
|
---|
950 | return NULL;
|
---|
951 | }
|
---|
952 |
|
---|
953 | const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void)
|
---|
954 | {
|
---|
955 | return NULL;
|
---|
956 | }
|
---|
957 | #endif
|
---|