1 | /*
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2 | * Copyright 2013-2016 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 |
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16 | #include <openssl/evp.h>
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17 | #include <openssl/objects.h>
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18 | #include <openssl/aes.h>
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19 | #include <openssl/sha.h>
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20 | #include <openssl/rand.h>
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21 | #include "../modes/modes_lcl.h"
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22 | #include "internal/constant_time_locl.h"
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23 | #include "internal/evp_int.h"
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24 |
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25 | typedef struct {
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26 | AES_KEY ks;
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27 | SHA256_CTX head, tail, md;
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28 | size_t payload_length; /* AAD length in decrypt case */
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29 | union {
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30 | unsigned int tls_ver;
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31 | unsigned char tls_aad[16]; /* 13 used */
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32 | } aux;
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33 | } EVP_AES_HMAC_SHA256;
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34 |
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35 | # define NO_PAYLOAD_LENGTH ((size_t)-1)
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36 |
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37 | #if defined(AES_ASM) && ( \
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38 | defined(__x86_64) || defined(__x86_64__) || \
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39 | defined(_M_AMD64) || defined(_M_X64) )
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40 |
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41 | extern unsigned int OPENSSL_ia32cap_P[];
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42 | # define AESNI_CAPABLE (1<<(57-32))
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43 |
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44 | int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
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45 | AES_KEY *key);
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46 | int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
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47 | AES_KEY *key);
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48 |
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49 | void aesni_cbc_encrypt(const unsigned char *in,
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50 | unsigned char *out,
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51 | size_t length,
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52 | const AES_KEY *key, unsigned char *ivec, int enc);
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53 |
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54 | int aesni_cbc_sha256_enc(const void *inp, void *out, size_t blocks,
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55 | const AES_KEY *key, unsigned char iv[16],
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56 | SHA256_CTX *ctx, const void *in0);
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57 |
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58 | # define data(ctx) ((EVP_AES_HMAC_SHA256 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
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59 |
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60 | static int aesni_cbc_hmac_sha256_init_key(EVP_CIPHER_CTX *ctx,
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61 | const unsigned char *inkey,
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62 | const unsigned char *iv, int enc)
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63 | {
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64 | EVP_AES_HMAC_SHA256 *key = data(ctx);
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65 | int ret;
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66 |
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67 | if (enc)
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68 | ret = aesni_set_encrypt_key(inkey,
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69 | EVP_CIPHER_CTX_key_length(ctx) * 8,
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70 | &key->ks);
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71 | else
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72 | ret = aesni_set_decrypt_key(inkey,
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73 | EVP_CIPHER_CTX_key_length(ctx) * 8,
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74 | &key->ks);
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75 |
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76 | SHA256_Init(&key->head); /* handy when benchmarking */
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77 | key->tail = key->head;
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78 | key->md = key->head;
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79 |
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80 | key->payload_length = NO_PAYLOAD_LENGTH;
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81 |
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82 | return ret < 0 ? 0 : 1;
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83 | }
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84 |
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85 | # define STITCHED_CALL
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86 |
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87 | # if !defined(STITCHED_CALL)
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88 | # define aes_off 0
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89 | # endif
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90 |
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91 | void sha256_block_data_order(void *c, const void *p, size_t len);
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92 |
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93 | static void sha256_update(SHA256_CTX *c, const void *data, size_t len)
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94 | {
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95 | const unsigned char *ptr = data;
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96 | size_t res;
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97 |
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98 | if ((res = c->num)) {
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99 | res = SHA256_CBLOCK - res;
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100 | if (len < res)
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101 | res = len;
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102 | SHA256_Update(c, ptr, res);
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103 | ptr += res;
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104 | len -= res;
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105 | }
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106 |
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107 | res = len % SHA256_CBLOCK;
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108 | len -= res;
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109 |
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110 | if (len) {
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111 | sha256_block_data_order(c, ptr, len / SHA256_CBLOCK);
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112 |
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113 | ptr += len;
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114 | c->Nh += len >> 29;
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115 | c->Nl += len <<= 3;
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116 | if (c->Nl < (unsigned int)len)
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117 | c->Nh++;
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118 | }
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119 |
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120 | if (res)
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121 | SHA256_Update(c, ptr, res);
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122 | }
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123 |
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124 | # ifdef SHA256_Update
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125 | # undef SHA256_Update
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126 | # endif
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127 | # define SHA256_Update sha256_update
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128 |
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129 | # if !defined(OPENSSL_NO_MULTIBLOCK)
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130 |
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131 | typedef struct {
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132 | unsigned int A[8], B[8], C[8], D[8], E[8], F[8], G[8], H[8];
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133 | } SHA256_MB_CTX;
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134 | typedef struct {
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135 | const unsigned char *ptr;
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136 | int blocks;
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137 | } HASH_DESC;
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138 |
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139 | void sha256_multi_block(SHA256_MB_CTX *, const HASH_DESC *, int);
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140 |
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141 | typedef struct {
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142 | const unsigned char *inp;
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143 | unsigned char *out;
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144 | int blocks;
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145 | u64 iv[2];
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146 | } CIPH_DESC;
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147 |
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148 | void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
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149 |
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150 | static size_t tls1_1_multi_block_encrypt(EVP_AES_HMAC_SHA256 *key,
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151 | unsigned char *out,
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152 | const unsigned char *inp,
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153 | size_t inp_len, int n4x)
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154 | { /* n4x is 1 or 2 */
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155 | HASH_DESC hash_d[8], edges[8];
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156 | CIPH_DESC ciph_d[8];
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157 | unsigned char storage[sizeof(SHA256_MB_CTX) + 32];
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158 | union {
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159 | u64 q[16];
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160 | u32 d[32];
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161 | u8 c[128];
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162 | } blocks[8];
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163 | SHA256_MB_CTX *ctx;
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164 | unsigned int frag, last, packlen, i, x4 = 4 * n4x, minblocks, processed =
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165 | 0;
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166 | size_t ret = 0;
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167 | u8 *IVs;
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168 | # if defined(BSWAP8)
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169 | u64 seqnum;
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170 | # endif
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171 |
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172 | /* ask for IVs in bulk */
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173 | if (RAND_bytes((IVs = blocks[0].c), 16 * x4) <= 0)
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174 | return 0;
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175 |
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176 | /* align */
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177 | ctx = (SHA256_MB_CTX *) (storage + 32 - ((size_t)storage % 32));
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178 |
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179 | frag = (unsigned int)inp_len >> (1 + n4x);
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180 | last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
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181 | if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
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182 | frag++;
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183 | last -= x4 - 1;
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184 | }
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185 |
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186 | packlen = 5 + 16 + ((frag + 32 + 16) & -16);
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187 |
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188 | /* populate descriptors with pointers and IVs */
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189 | hash_d[0].ptr = inp;
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190 | ciph_d[0].inp = inp;
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191 | /* 5+16 is place for header and explicit IV */
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192 | ciph_d[0].out = out + 5 + 16;
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193 | memcpy(ciph_d[0].out - 16, IVs, 16);
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194 | memcpy(ciph_d[0].iv, IVs, 16);
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195 | IVs += 16;
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196 |
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197 | for (i = 1; i < x4; i++) {
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198 | ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
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199 | ciph_d[i].out = ciph_d[i - 1].out + packlen;
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200 | memcpy(ciph_d[i].out - 16, IVs, 16);
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201 | memcpy(ciph_d[i].iv, IVs, 16);
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202 | IVs += 16;
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203 | }
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204 |
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205 | # if defined(BSWAP8)
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206 | memcpy(blocks[0].c, key->md.data, 8);
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207 | seqnum = BSWAP8(blocks[0].q[0]);
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208 | # endif
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209 | for (i = 0; i < x4; i++) {
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210 | unsigned int len = (i == (x4 - 1) ? last : frag);
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211 | # if !defined(BSWAP8)
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212 | unsigned int carry, j;
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213 | # endif
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214 |
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215 | ctx->A[i] = key->md.h[0];
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216 | ctx->B[i] = key->md.h[1];
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217 | ctx->C[i] = key->md.h[2];
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218 | ctx->D[i] = key->md.h[3];
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219 | ctx->E[i] = key->md.h[4];
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220 | ctx->F[i] = key->md.h[5];
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221 | ctx->G[i] = key->md.h[6];
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222 | ctx->H[i] = key->md.h[7];
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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 | sha256_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 | sha256_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 | sha256_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 | sha256_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.h[0];
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324 | blocks[i].d[1] = BSWAP4(ctx->B[i]);
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325 | ctx->B[i] = key->tail.h[1];
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326 | blocks[i].d[2] = BSWAP4(ctx->C[i]);
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327 | ctx->C[i] = key->tail.h[2];
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328 | blocks[i].d[3] = BSWAP4(ctx->D[i]);
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329 | ctx->D[i] = key->tail.h[3];
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330 | blocks[i].d[4] = BSWAP4(ctx->E[i]);
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331 | ctx->E[i] = key->tail.h[4];
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332 | blocks[i].d[5] = BSWAP4(ctx->F[i]);
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333 | ctx->F[i] = key->tail.h[5];
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334 | blocks[i].d[6] = BSWAP4(ctx->G[i]);
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335 | ctx->G[i] = key->tail.h[6];
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336 | blocks[i].d[7] = BSWAP4(ctx->H[i]);
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337 | ctx->H[i] = key->tail.h[7];
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338 | blocks[i].c[32] = 0x80;
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339 | blocks[i].d[15] = BSWAP4((64 + 32) * 8);
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340 | # else
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341 | PUTU32(blocks[i].c + 0, ctx->A[i]);
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342 | ctx->A[i] = key->tail.h[0];
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343 | PUTU32(blocks[i].c + 4, ctx->B[i]);
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344 | ctx->B[i] = key->tail.h[1];
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345 | PUTU32(blocks[i].c + 8, ctx->C[i]);
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346 | ctx->C[i] = key->tail.h[2];
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347 | PUTU32(blocks[i].c + 12, ctx->D[i]);
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348 | ctx->D[i] = key->tail.h[3];
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349 | PUTU32(blocks[i].c + 16, ctx->E[i]);
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350 | ctx->E[i] = key->tail.h[4];
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351 | PUTU32(blocks[i].c + 20, ctx->F[i]);
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352 | ctx->F[i] = key->tail.h[5];
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353 | PUTU32(blocks[i].c + 24, ctx->G[i]);
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354 | ctx->G[i] = key->tail.h[6];
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355 | PUTU32(blocks[i].c + 28, ctx->H[i]);
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356 | ctx->H[i] = key->tail.h[7];
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357 | blocks[i].c[32] = 0x80;
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358 | PUTU32(blocks[i].c + 60, (64 + 32) * 8);
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359 | # endif
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360 | edges[i].ptr = blocks[i].c;
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361 | edges[i].blocks = 1;
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362 | }
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363 |
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364 | /* finalize MACs */
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365 | sha256_multi_block(ctx, edges, n4x);
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366 |
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367 | for (i = 0; i < x4; i++) {
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368 | unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
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369 | unsigned char *out0 = out;
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370 |
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371 | memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
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372 | ciph_d[i].inp = ciph_d[i].out;
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373 |
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374 | out += 5 + 16 + len;
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375 |
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376 | /* write MAC */
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377 | PUTU32(out + 0, ctx->A[i]);
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378 | PUTU32(out + 4, ctx->B[i]);
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379 | PUTU32(out + 8, ctx->C[i]);
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380 | PUTU32(out + 12, ctx->D[i]);
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381 | PUTU32(out + 16, ctx->E[i]);
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382 | PUTU32(out + 20, ctx->F[i]);
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383 | PUTU32(out + 24, ctx->G[i]);
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384 | PUTU32(out + 28, ctx->H[i]);
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385 | out += 32;
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386 | len += 32;
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387 |
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388 | /* pad */
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389 | pad = 15 - len % 16;
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390 | for (j = 0; j <= pad; j++)
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391 | *(out++) = pad;
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392 | len += pad + 1;
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393 |
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394 | ciph_d[i].blocks = (len - processed) / 16;
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395 | len += 16; /* account for explicit iv */
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396 |
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397 | /* arrange header */
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398 | out0[0] = ((u8 *)key->md.data)[8];
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399 | out0[1] = ((u8 *)key->md.data)[9];
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400 | out0[2] = ((u8 *)key->md.data)[10];
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401 | out0[3] = (u8)(len >> 8);
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402 | out0[4] = (u8)(len);
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403 |
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404 | ret += len + 5;
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405 | inp += frag;
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406 | }
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407 |
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408 | aesni_multi_cbc_encrypt(ciph_d, &key->ks, n4x);
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409 |
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410 | OPENSSL_cleanse(blocks, sizeof(blocks));
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411 | OPENSSL_cleanse(ctx, sizeof(*ctx));
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412 |
|
---|
413 | return ret;
|
---|
414 | }
|
---|
415 | # endif
|
---|
416 |
|
---|
417 | static int aesni_cbc_hmac_sha256_cipher(EVP_CIPHER_CTX *ctx,
|
---|
418 | unsigned char *out,
|
---|
419 | const unsigned char *in, size_t len)
|
---|
420 | {
|
---|
421 | EVP_AES_HMAC_SHA256 *key = data(ctx);
|
---|
422 | unsigned int l;
|
---|
423 | size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
|
---|
424 | * later */
|
---|
425 | sha_off = 0;
|
---|
426 | # if defined(STITCHED_CALL)
|
---|
427 | size_t aes_off = 0, blocks;
|
---|
428 |
|
---|
429 | sha_off = SHA256_CBLOCK - key->md.num;
|
---|
430 | # endif
|
---|
431 |
|
---|
432 | key->payload_length = NO_PAYLOAD_LENGTH;
|
---|
433 |
|
---|
434 | if (len % AES_BLOCK_SIZE)
|
---|
435 | return 0;
|
---|
436 |
|
---|
437 | if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
---|
438 | if (plen == NO_PAYLOAD_LENGTH)
|
---|
439 | plen = len;
|
---|
440 | else if (len !=
|
---|
441 | ((plen + SHA256_DIGEST_LENGTH +
|
---|
442 | AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
|
---|
443 | return 0;
|
---|
444 | else if (key->aux.tls_ver >= TLS1_1_VERSION)
|
---|
445 | iv = AES_BLOCK_SIZE;
|
---|
446 |
|
---|
447 | # if defined(STITCHED_CALL)
|
---|
448 | /*
|
---|
449 | * Assembly stitch handles AVX-capable processors, but its
|
---|
450 | * performance is not optimal on AMD Jaguar, ~40% worse, for
|
---|
451 | * unknown reasons. Incidentally processor in question supports
|
---|
452 | * AVX, but not AMD-specific XOP extension, which can be used
|
---|
453 | * to identify it and avoid stitch invocation. So that after we
|
---|
454 | * establish that current CPU supports AVX, we even see if it's
|
---|
455 | * either even XOP-capable Bulldozer-based or GenuineIntel one.
|
---|
456 | */
|
---|
457 | if (OPENSSL_ia32cap_P[1] & (1 << (60 - 32)) && /* AVX? */
|
---|
458 | ((OPENSSL_ia32cap_P[1] & (1 << (43 - 32))) /* XOP? */
|
---|
459 | | (OPENSSL_ia32cap_P[0] & (1<<30))) && /* "Intel CPU"? */
|
---|
460 | plen > (sha_off + iv) &&
|
---|
461 | (blocks = (plen - (sha_off + iv)) / SHA256_CBLOCK)) {
|
---|
462 | SHA256_Update(&key->md, in + iv, sha_off);
|
---|
463 |
|
---|
464 | (void)aesni_cbc_sha256_enc(in, out, blocks, &key->ks,
|
---|
465 | EVP_CIPHER_CTX_iv_noconst(ctx),
|
---|
466 | &key->md, in + iv + sha_off);
|
---|
467 | blocks *= SHA256_CBLOCK;
|
---|
468 | aes_off += blocks;
|
---|
469 | sha_off += blocks;
|
---|
470 | key->md.Nh += blocks >> 29;
|
---|
471 | key->md.Nl += blocks <<= 3;
|
---|
472 | if (key->md.Nl < (unsigned int)blocks)
|
---|
473 | key->md.Nh++;
|
---|
474 | } else {
|
---|
475 | sha_off = 0;
|
---|
476 | }
|
---|
477 | # endif
|
---|
478 | sha_off += iv;
|
---|
479 | SHA256_Update(&key->md, in + sha_off, plen - sha_off);
|
---|
480 |
|
---|
481 | if (plen != len) { /* "TLS" mode of operation */
|
---|
482 | if (in != out)
|
---|
483 | memcpy(out + aes_off, in + aes_off, plen - aes_off);
|
---|
484 |
|
---|
485 | /* calculate HMAC and append it to payload */
|
---|
486 | SHA256_Final(out + plen, &key->md);
|
---|
487 | key->md = key->tail;
|
---|
488 | SHA256_Update(&key->md, out + plen, SHA256_DIGEST_LENGTH);
|
---|
489 | SHA256_Final(out + plen, &key->md);
|
---|
490 |
|
---|
491 | /* pad the payload|hmac */
|
---|
492 | plen += SHA256_DIGEST_LENGTH;
|
---|
493 | for (l = len - plen - 1; plen < len; plen++)
|
---|
494 | out[plen] = l;
|
---|
495 | /* encrypt HMAC|padding at once */
|
---|
496 | aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
|
---|
497 | &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
|
---|
498 | } else {
|
---|
499 | aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
|
---|
500 | &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
|
---|
501 | }
|
---|
502 | } else {
|
---|
503 | union {
|
---|
504 | unsigned int u[SHA256_DIGEST_LENGTH / sizeof(unsigned int)];
|
---|
505 | unsigned char c[64 + SHA256_DIGEST_LENGTH];
|
---|
506 | } mac, *pmac;
|
---|
507 |
|
---|
508 | /* arrange cache line alignment */
|
---|
509 | pmac = (void *)(((size_t)mac.c + 63) & ((size_t)0 - 64));
|
---|
510 |
|
---|
511 | /* decrypt HMAC|padding at once */
|
---|
512 | aesni_cbc_encrypt(in, out, len, &key->ks,
|
---|
513 | EVP_CIPHER_CTX_iv_noconst(ctx), 0);
|
---|
514 |
|
---|
515 | if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
|
---|
516 | size_t inp_len, mask, j, i;
|
---|
517 | unsigned int res, maxpad, pad, bitlen;
|
---|
518 | int ret = 1;
|
---|
519 | union {
|
---|
520 | unsigned int u[SHA_LBLOCK];
|
---|
521 | unsigned char c[SHA256_CBLOCK];
|
---|
522 | } *data = (void *)key->md.data;
|
---|
523 |
|
---|
524 | if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
|
---|
525 | >= TLS1_1_VERSION)
|
---|
526 | iv = AES_BLOCK_SIZE;
|
---|
527 |
|
---|
528 | if (len < (iv + SHA256_DIGEST_LENGTH + 1))
|
---|
529 | return 0;
|
---|
530 |
|
---|
531 | /* omit explicit iv */
|
---|
532 | out += iv;
|
---|
533 | len -= iv;
|
---|
534 |
|
---|
535 | /* figure out payload length */
|
---|
536 | pad = out[len - 1];
|
---|
537 | maxpad = len - (SHA256_DIGEST_LENGTH + 1);
|
---|
538 | maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
|
---|
539 | maxpad &= 255;
|
---|
540 |
|
---|
541 | ret &= constant_time_ge(maxpad, pad);
|
---|
542 |
|
---|
543 | inp_len = len - (SHA256_DIGEST_LENGTH + pad + 1);
|
---|
544 | mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
|
---|
545 | inp_len &= mask;
|
---|
546 | ret &= (int)mask;
|
---|
547 |
|
---|
548 | key->aux.tls_aad[plen - 2] = inp_len >> 8;
|
---|
549 | key->aux.tls_aad[plen - 1] = inp_len;
|
---|
550 |
|
---|
551 | /* calculate HMAC */
|
---|
552 | key->md = key->head;
|
---|
553 | SHA256_Update(&key->md, key->aux.tls_aad, plen);
|
---|
554 |
|
---|
555 | # if 1
|
---|
556 | len -= SHA256_DIGEST_LENGTH; /* amend mac */
|
---|
557 | if (len >= (256 + SHA256_CBLOCK)) {
|
---|
558 | j = (len - (256 + SHA256_CBLOCK)) & (0 - SHA256_CBLOCK);
|
---|
559 | j += SHA256_CBLOCK - key->md.num;
|
---|
560 | SHA256_Update(&key->md, out, j);
|
---|
561 | out += j;
|
---|
562 | len -= j;
|
---|
563 | inp_len -= j;
|
---|
564 | }
|
---|
565 |
|
---|
566 | /* but pretend as if we hashed padded payload */
|
---|
567 | bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
|
---|
568 | # ifdef BSWAP4
|
---|
569 | bitlen = BSWAP4(bitlen);
|
---|
570 | # else
|
---|
571 | mac.c[0] = 0;
|
---|
572 | mac.c[1] = (unsigned char)(bitlen >> 16);
|
---|
573 | mac.c[2] = (unsigned char)(bitlen >> 8);
|
---|
574 | mac.c[3] = (unsigned char)bitlen;
|
---|
575 | bitlen = mac.u[0];
|
---|
576 | # endif
|
---|
577 |
|
---|
578 | pmac->u[0] = 0;
|
---|
579 | pmac->u[1] = 0;
|
---|
580 | pmac->u[2] = 0;
|
---|
581 | pmac->u[3] = 0;
|
---|
582 | pmac->u[4] = 0;
|
---|
583 | pmac->u[5] = 0;
|
---|
584 | pmac->u[6] = 0;
|
---|
585 | pmac->u[7] = 0;
|
---|
586 |
|
---|
587 | for (res = key->md.num, j = 0; j < len; j++) {
|
---|
588 | size_t c = out[j];
|
---|
589 | mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
|
---|
590 | c &= mask;
|
---|
591 | c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
|
---|
592 | data->c[res++] = (unsigned char)c;
|
---|
593 |
|
---|
594 | if (res != SHA256_CBLOCK)
|
---|
595 | continue;
|
---|
596 |
|
---|
597 | /* j is not incremented yet */
|
---|
598 | mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
|
---|
599 | data->u[SHA_LBLOCK - 1] |= bitlen & mask;
|
---|
600 | sha256_block_data_order(&key->md, data, 1);
|
---|
601 | mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
|
---|
602 | pmac->u[0] |= key->md.h[0] & mask;
|
---|
603 | pmac->u[1] |= key->md.h[1] & mask;
|
---|
604 | pmac->u[2] |= key->md.h[2] & mask;
|
---|
605 | pmac->u[3] |= key->md.h[3] & mask;
|
---|
606 | pmac->u[4] |= key->md.h[4] & mask;
|
---|
607 | pmac->u[5] |= key->md.h[5] & mask;
|
---|
608 | pmac->u[6] |= key->md.h[6] & mask;
|
---|
609 | pmac->u[7] |= key->md.h[7] & mask;
|
---|
610 | res = 0;
|
---|
611 | }
|
---|
612 |
|
---|
613 | for (i = res; i < SHA256_CBLOCK; i++, j++)
|
---|
614 | data->c[i] = 0;
|
---|
615 |
|
---|
616 | if (res > SHA256_CBLOCK - 8) {
|
---|
617 | mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
|
---|
618 | data->u[SHA_LBLOCK - 1] |= bitlen & mask;
|
---|
619 | sha256_block_data_order(&key->md, data, 1);
|
---|
620 | mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
|
---|
621 | pmac->u[0] |= key->md.h[0] & mask;
|
---|
622 | pmac->u[1] |= key->md.h[1] & mask;
|
---|
623 | pmac->u[2] |= key->md.h[2] & mask;
|
---|
624 | pmac->u[3] |= key->md.h[3] & mask;
|
---|
625 | pmac->u[4] |= key->md.h[4] & mask;
|
---|
626 | pmac->u[5] |= key->md.h[5] & mask;
|
---|
627 | pmac->u[6] |= key->md.h[6] & mask;
|
---|
628 | pmac->u[7] |= key->md.h[7] & mask;
|
---|
629 |
|
---|
630 | memset(data, 0, SHA256_CBLOCK);
|
---|
631 | j += 64;
|
---|
632 | }
|
---|
633 | data->u[SHA_LBLOCK - 1] = bitlen;
|
---|
634 | sha256_block_data_order(&key->md, data, 1);
|
---|
635 | mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
|
---|
636 | pmac->u[0] |= key->md.h[0] & mask;
|
---|
637 | pmac->u[1] |= key->md.h[1] & mask;
|
---|
638 | pmac->u[2] |= key->md.h[2] & mask;
|
---|
639 | pmac->u[3] |= key->md.h[3] & mask;
|
---|
640 | pmac->u[4] |= key->md.h[4] & mask;
|
---|
641 | pmac->u[5] |= key->md.h[5] & mask;
|
---|
642 | pmac->u[6] |= key->md.h[6] & mask;
|
---|
643 | pmac->u[7] |= key->md.h[7] & mask;
|
---|
644 |
|
---|
645 | # ifdef BSWAP4
|
---|
646 | pmac->u[0] = BSWAP4(pmac->u[0]);
|
---|
647 | pmac->u[1] = BSWAP4(pmac->u[1]);
|
---|
648 | pmac->u[2] = BSWAP4(pmac->u[2]);
|
---|
649 | pmac->u[3] = BSWAP4(pmac->u[3]);
|
---|
650 | pmac->u[4] = BSWAP4(pmac->u[4]);
|
---|
651 | pmac->u[5] = BSWAP4(pmac->u[5]);
|
---|
652 | pmac->u[6] = BSWAP4(pmac->u[6]);
|
---|
653 | pmac->u[7] = BSWAP4(pmac->u[7]);
|
---|
654 | # else
|
---|
655 | for (i = 0; i < 8; i++) {
|
---|
656 | res = pmac->u[i];
|
---|
657 | pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
|
---|
658 | pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
|
---|
659 | pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
|
---|
660 | pmac->c[4 * i + 3] = (unsigned char)res;
|
---|
661 | }
|
---|
662 | # endif
|
---|
663 | len += SHA256_DIGEST_LENGTH;
|
---|
664 | # else
|
---|
665 | SHA256_Update(&key->md, out, inp_len);
|
---|
666 | res = key->md.num;
|
---|
667 | SHA256_Final(pmac->c, &key->md);
|
---|
668 |
|
---|
669 | {
|
---|
670 | unsigned int inp_blocks, pad_blocks;
|
---|
671 |
|
---|
672 | /* but pretend as if we hashed padded payload */
|
---|
673 | inp_blocks =
|
---|
674 | 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
|
---|
675 | res += (unsigned int)(len - inp_len);
|
---|
676 | pad_blocks = res / SHA256_CBLOCK;
|
---|
677 | res %= SHA256_CBLOCK;
|
---|
678 | pad_blocks +=
|
---|
679 | 1 + ((SHA256_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
|
---|
680 | for (; inp_blocks < pad_blocks; inp_blocks++)
|
---|
681 | sha1_block_data_order(&key->md, data, 1);
|
---|
682 | }
|
---|
683 | # endif
|
---|
684 | key->md = key->tail;
|
---|
685 | SHA256_Update(&key->md, pmac->c, SHA256_DIGEST_LENGTH);
|
---|
686 | SHA256_Final(pmac->c, &key->md);
|
---|
687 |
|
---|
688 | /* verify HMAC */
|
---|
689 | out += inp_len;
|
---|
690 | len -= inp_len;
|
---|
691 | # if 1
|
---|
692 | {
|
---|
693 | unsigned char *p =
|
---|
694 | out + len - 1 - maxpad - SHA256_DIGEST_LENGTH;
|
---|
695 | size_t off = out - p;
|
---|
696 | unsigned int c, cmask;
|
---|
697 |
|
---|
698 | maxpad += SHA256_DIGEST_LENGTH;
|
---|
699 | for (res = 0, i = 0, j = 0; j < maxpad; j++) {
|
---|
700 | c = p[j];
|
---|
701 | cmask =
|
---|
702 | ((int)(j - off - SHA256_DIGEST_LENGTH)) >>
|
---|
703 | (sizeof(int) * 8 - 1);
|
---|
704 | res |= (c ^ pad) & ~cmask; /* ... and padding */
|
---|
705 | cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
|
---|
706 | res |= (c ^ pmac->c[i]) & cmask;
|
---|
707 | i += 1 & cmask;
|
---|
708 | }
|
---|
709 | maxpad -= SHA256_DIGEST_LENGTH;
|
---|
710 |
|
---|
711 | res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
|
---|
712 | ret &= (int)~res;
|
---|
713 | }
|
---|
714 | # else
|
---|
715 | for (res = 0, i = 0; i < SHA256_DIGEST_LENGTH; i++)
|
---|
716 | res |= out[i] ^ pmac->c[i];
|
---|
717 | res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
|
---|
718 | ret &= (int)~res;
|
---|
719 |
|
---|
720 | /* verify padding */
|
---|
721 | pad = (pad & ~res) | (maxpad & res);
|
---|
722 | out = out + len - 1 - pad;
|
---|
723 | for (res = 0, i = 0; i < pad; i++)
|
---|
724 | res |= out[i] ^ pad;
|
---|
725 |
|
---|
726 | res = (0 - res) >> (sizeof(res) * 8 - 1);
|
---|
727 | ret &= (int)~res;
|
---|
728 | # endif
|
---|
729 | return ret;
|
---|
730 | } else {
|
---|
731 | SHA256_Update(&key->md, out, len);
|
---|
732 | }
|
---|
733 | }
|
---|
734 |
|
---|
735 | return 1;
|
---|
736 | }
|
---|
737 |
|
---|
738 | static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
|
---|
739 | void *ptr)
|
---|
740 | {
|
---|
741 | EVP_AES_HMAC_SHA256 *key = data(ctx);
|
---|
742 | unsigned int u_arg = (unsigned int)arg;
|
---|
743 |
|
---|
744 | switch (type) {
|
---|
745 | case EVP_CTRL_AEAD_SET_MAC_KEY:
|
---|
746 | {
|
---|
747 | unsigned int i;
|
---|
748 | unsigned char hmac_key[64];
|
---|
749 |
|
---|
750 | memset(hmac_key, 0, sizeof(hmac_key));
|
---|
751 |
|
---|
752 | if (arg < 0)
|
---|
753 | return -1;
|
---|
754 |
|
---|
755 | if (u_arg > sizeof(hmac_key)) {
|
---|
756 | SHA256_Init(&key->head);
|
---|
757 | SHA256_Update(&key->head, ptr, arg);
|
---|
758 | SHA256_Final(hmac_key, &key->head);
|
---|
759 | } else {
|
---|
760 | memcpy(hmac_key, ptr, arg);
|
---|
761 | }
|
---|
762 |
|
---|
763 | for (i = 0; i < sizeof(hmac_key); i++)
|
---|
764 | hmac_key[i] ^= 0x36; /* ipad */
|
---|
765 | SHA256_Init(&key->head);
|
---|
766 | SHA256_Update(&key->head, hmac_key, sizeof(hmac_key));
|
---|
767 |
|
---|
768 | for (i = 0; i < sizeof(hmac_key); i++)
|
---|
769 | hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
|
---|
770 | SHA256_Init(&key->tail);
|
---|
771 | SHA256_Update(&key->tail, hmac_key, sizeof(hmac_key));
|
---|
772 |
|
---|
773 | OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
|
---|
774 |
|
---|
775 | return 1;
|
---|
776 | }
|
---|
777 | case EVP_CTRL_AEAD_TLS1_AAD:
|
---|
778 | {
|
---|
779 | unsigned char *p = ptr;
|
---|
780 | unsigned int len = p[arg - 2] << 8 | p[arg - 1];
|
---|
781 |
|
---|
782 | if (arg != EVP_AEAD_TLS1_AAD_LEN)
|
---|
783 | return -1;
|
---|
784 |
|
---|
785 | if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
---|
786 | key->payload_length = len;
|
---|
787 | if ((key->aux.tls_ver =
|
---|
788 | p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
|
---|
789 | len -= AES_BLOCK_SIZE;
|
---|
790 | p[arg - 2] = len >> 8;
|
---|
791 | p[arg - 1] = len;
|
---|
792 | }
|
---|
793 | key->md = key->head;
|
---|
794 | SHA256_Update(&key->md, p, arg);
|
---|
795 |
|
---|
796 | return (int)(((len + SHA256_DIGEST_LENGTH +
|
---|
797 | AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
|
---|
798 | - len);
|
---|
799 | } else {
|
---|
800 | memcpy(key->aux.tls_aad, ptr, arg);
|
---|
801 | key->payload_length = arg;
|
---|
802 |
|
---|
803 | return SHA256_DIGEST_LENGTH;
|
---|
804 | }
|
---|
805 | }
|
---|
806 | # if !defined(OPENSSL_NO_MULTIBLOCK)
|
---|
807 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
|
---|
808 | return (int)(5 + 16 + ((arg + 32 + 16) & -16));
|
---|
809 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD:
|
---|
810 | {
|
---|
811 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
|
---|
812 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
|
---|
813 | unsigned int n4x = 1, x4;
|
---|
814 | unsigned int frag, last, packlen, inp_len;
|
---|
815 |
|
---|
816 | if (arg < 0)
|
---|
817 | return -1;
|
---|
818 |
|
---|
819 | if (u_arg < sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
|
---|
820 | return -1;
|
---|
821 |
|
---|
822 | inp_len = param->inp[11] << 8 | param->inp[12];
|
---|
823 |
|
---|
824 | if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
---|
825 | if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
|
---|
826 | return -1;
|
---|
827 |
|
---|
828 | if (inp_len) {
|
---|
829 | if (inp_len < 4096)
|
---|
830 | return 0; /* too short */
|
---|
831 |
|
---|
832 | if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
|
---|
833 | n4x = 2; /* AVX2 */
|
---|
834 | } else if ((n4x = param->interleave / 4) && n4x <= 2)
|
---|
835 | inp_len = param->len;
|
---|
836 | else
|
---|
837 | return -1;
|
---|
838 |
|
---|
839 | key->md = key->head;
|
---|
840 | SHA256_Update(&key->md, param->inp, 13);
|
---|
841 |
|
---|
842 | x4 = 4 * n4x;
|
---|
843 | n4x += 1;
|
---|
844 |
|
---|
845 | frag = inp_len >> n4x;
|
---|
846 | last = inp_len + frag - (frag << n4x);
|
---|
847 | if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
|
---|
848 | frag++;
|
---|
849 | last -= x4 - 1;
|
---|
850 | }
|
---|
851 |
|
---|
852 | packlen = 5 + 16 + ((frag + 32 + 16) & -16);
|
---|
853 | packlen = (packlen << n4x) - packlen;
|
---|
854 | packlen += 5 + 16 + ((last + 32 + 16) & -16);
|
---|
855 |
|
---|
856 | param->interleave = x4;
|
---|
857 |
|
---|
858 | return (int)packlen;
|
---|
859 | } else
|
---|
860 | return -1; /* not yet */
|
---|
861 | }
|
---|
862 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT:
|
---|
863 | {
|
---|
864 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param =
|
---|
865 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *) ptr;
|
---|
866 |
|
---|
867 | return (int)tls1_1_multi_block_encrypt(key, param->out,
|
---|
868 | param->inp, param->len,
|
---|
869 | param->interleave / 4);
|
---|
870 | }
|
---|
871 | case EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT:
|
---|
872 | # endif
|
---|
873 | default:
|
---|
874 | return -1;
|
---|
875 | }
|
---|
876 | }
|
---|
877 |
|
---|
878 | static EVP_CIPHER aesni_128_cbc_hmac_sha256_cipher = {
|
---|
879 | # ifdef NID_aes_128_cbc_hmac_sha256
|
---|
880 | NID_aes_128_cbc_hmac_sha256,
|
---|
881 | # else
|
---|
882 | NID_undef,
|
---|
883 | # endif
|
---|
884 | AES_BLOCK_SIZE, 16, AES_BLOCK_SIZE,
|
---|
885 | EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
|
---|
886 | EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
|
---|
887 | aesni_cbc_hmac_sha256_init_key,
|
---|
888 | aesni_cbc_hmac_sha256_cipher,
|
---|
889 | NULL,
|
---|
890 | sizeof(EVP_AES_HMAC_SHA256),
|
---|
891 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
|
---|
892 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
|
---|
893 | aesni_cbc_hmac_sha256_ctrl,
|
---|
894 | NULL
|
---|
895 | };
|
---|
896 |
|
---|
897 | static EVP_CIPHER aesni_256_cbc_hmac_sha256_cipher = {
|
---|
898 | # ifdef NID_aes_256_cbc_hmac_sha256
|
---|
899 | NID_aes_256_cbc_hmac_sha256,
|
---|
900 | # else
|
---|
901 | NID_undef,
|
---|
902 | # endif
|
---|
903 | AES_BLOCK_SIZE, 32, AES_BLOCK_SIZE,
|
---|
904 | EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
|
---|
905 | EVP_CIPH_FLAG_AEAD_CIPHER | EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK,
|
---|
906 | aesni_cbc_hmac_sha256_init_key,
|
---|
907 | aesni_cbc_hmac_sha256_cipher,
|
---|
908 | NULL,
|
---|
909 | sizeof(EVP_AES_HMAC_SHA256),
|
---|
910 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv,
|
---|
911 | EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv,
|
---|
912 | aesni_cbc_hmac_sha256_ctrl,
|
---|
913 | NULL
|
---|
914 | };
|
---|
915 |
|
---|
916 | const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
|
---|
917 | {
|
---|
918 | return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
|
---|
919 | aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
|
---|
920 | &aesni_128_cbc_hmac_sha256_cipher : NULL);
|
---|
921 | }
|
---|
922 |
|
---|
923 | const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
|
---|
924 | {
|
---|
925 | return ((OPENSSL_ia32cap_P[1] & AESNI_CAPABLE) &&
|
---|
926 | aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL) ?
|
---|
927 | &aesni_256_cbc_hmac_sha256_cipher : NULL);
|
---|
928 | }
|
---|
929 | #else
|
---|
930 | const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void)
|
---|
931 | {
|
---|
932 | return NULL;
|
---|
933 | }
|
---|
934 |
|
---|
935 | const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void)
|
---|
936 | {
|
---|
937 | return NULL;
|
---|
938 | }
|
---|
939 | #endif
|
---|