1 | /*
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2 | * Copyright 2005-2016 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 | /*
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11 | * Support for PVK format keys and related structures (such a PUBLICKEYBLOB
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12 | * and PRIVATEKEYBLOB).
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13 | */
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14 |
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15 | #include "internal/cryptlib.h"
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16 | #include <openssl/pem.h>
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17 | #include <openssl/rand.h>
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18 | #include <openssl/bn.h>
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19 | #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
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20 | # include <openssl/dsa.h>
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21 | # include <openssl/rsa.h>
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22 |
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23 | /*
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24 | * Utility function: read a DWORD (4 byte unsigned integer) in little endian
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25 | * format
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26 | */
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27 |
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28 | static unsigned int read_ledword(const unsigned char **in)
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29 | {
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30 | const unsigned char *p = *in;
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31 | unsigned int ret;
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32 | ret = *p++;
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33 | ret |= (*p++ << 8);
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34 | ret |= (*p++ << 16);
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35 | ret |= (*p++ << 24);
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36 | *in = p;
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37 | return ret;
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38 | }
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39 |
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40 | /*
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41 | * Read a BIGNUM in little endian format. The docs say that this should take
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42 | * up bitlen/8 bytes.
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43 | */
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44 |
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45 | static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
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46 | {
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47 | *r = BN_lebin2bn(*in, nbyte, NULL);
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48 | if (*r == NULL)
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49 | return 0;
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50 | *in += nbyte;
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51 | return 1;
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52 | }
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53 |
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54 | /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
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55 |
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56 | # define MS_PUBLICKEYBLOB 0x6
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57 | # define MS_PRIVATEKEYBLOB 0x7
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58 | # define MS_RSA1MAGIC 0x31415352L
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59 | # define MS_RSA2MAGIC 0x32415352L
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60 | # define MS_DSS1MAGIC 0x31535344L
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61 | # define MS_DSS2MAGIC 0x32535344L
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62 |
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63 | # define MS_KEYALG_RSA_KEYX 0xa400
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64 | # define MS_KEYALG_DSS_SIGN 0x2200
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65 |
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66 | # define MS_KEYTYPE_KEYX 0x1
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67 | # define MS_KEYTYPE_SIGN 0x2
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68 |
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69 | /* Maximum length of a blob after header */
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70 | # define BLOB_MAX_LENGTH 102400
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71 |
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72 | /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
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73 | # define MS_PVKMAGIC 0xb0b5f11eL
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74 | /* Salt length for PVK files */
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75 | # define PVK_SALTLEN 0x10
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76 | /* Maximum length in PVK header */
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77 | # define PVK_MAX_KEYLEN 102400
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78 | /* Maximum salt length */
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79 | # define PVK_MAX_SALTLEN 10240
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80 |
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81 | static EVP_PKEY *b2i_rsa(const unsigned char **in,
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82 | unsigned int bitlen, int ispub);
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83 | static EVP_PKEY *b2i_dss(const unsigned char **in,
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84 | unsigned int bitlen, int ispub);
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85 |
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86 | static int do_blob_header(const unsigned char **in, unsigned int length,
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87 | unsigned int *pmagic, unsigned int *pbitlen,
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88 | int *pisdss, int *pispub)
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89 | {
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90 | const unsigned char *p = *in;
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91 | if (length < 16)
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92 | return 0;
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93 | /* bType */
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94 | if (*p == MS_PUBLICKEYBLOB) {
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95 | if (*pispub == 0) {
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96 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
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97 | return 0;
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98 | }
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99 | *pispub = 1;
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100 | } else if (*p == MS_PRIVATEKEYBLOB) {
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101 | if (*pispub == 1) {
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102 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
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103 | return 0;
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104 | }
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105 | *pispub = 0;
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106 | } else
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107 | return 0;
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108 | p++;
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109 | /* Version */
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110 | if (*p++ != 0x2) {
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111 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
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112 | return 0;
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113 | }
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114 | /* Ignore reserved, aiKeyAlg */
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115 | p += 6;
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116 | *pmagic = read_ledword(&p);
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117 | *pbitlen = read_ledword(&p);
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118 | *pisdss = 0;
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119 | switch (*pmagic) {
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120 |
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121 | case MS_DSS1MAGIC:
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122 | *pisdss = 1;
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123 | case MS_RSA1MAGIC:
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124 | if (*pispub == 0) {
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125 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
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126 | return 0;
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127 | }
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128 | break;
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129 |
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130 | case MS_DSS2MAGIC:
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131 | *pisdss = 1;
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132 | case MS_RSA2MAGIC:
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133 | if (*pispub == 1) {
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134 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
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135 | return 0;
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136 | }
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137 | break;
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138 |
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139 | default:
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140 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
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141 | return -1;
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142 | }
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143 | *in = p;
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144 | return 1;
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145 | }
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146 |
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147 | static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
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148 | {
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149 | unsigned int nbyte, hnbyte;
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150 | nbyte = (bitlen + 7) >> 3;
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151 | hnbyte = (bitlen + 15) >> 4;
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152 | if (isdss) {
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153 |
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154 | /*
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155 | * Expected length: 20 for q + 3 components bitlen each + 24 for seed
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156 | * structure.
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157 | */
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158 | if (ispub)
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159 | return 44 + 3 * nbyte;
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160 | /*
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161 | * Expected length: 20 for q, priv, 2 bitlen components + 24 for seed
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162 | * structure.
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163 | */
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164 | else
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165 | return 64 + 2 * nbyte;
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166 | } else {
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167 | /* Expected length: 4 for 'e' + 'n' */
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168 | if (ispub)
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169 | return 4 + nbyte;
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170 | else
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171 | /*
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172 | * Expected length: 4 for 'e' and 7 other components. 2
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173 | * components are bitlen size, 5 are bitlen/2
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174 | */
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175 | return 4 + 2 * nbyte + 5 * hnbyte;
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176 | }
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177 |
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178 | }
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179 |
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180 | static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
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181 | int ispub)
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182 | {
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183 | const unsigned char *p = *in;
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184 | unsigned int bitlen, magic;
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185 | int isdss;
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186 | if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
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187 | PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
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188 | return NULL;
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189 | }
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190 | length -= 16;
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191 | if (length < blob_length(bitlen, isdss, ispub)) {
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192 | PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
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193 | return NULL;
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194 | }
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195 | if (isdss)
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196 | return b2i_dss(&p, bitlen, ispub);
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197 | else
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198 | return b2i_rsa(&p, bitlen, ispub);
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199 | }
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200 |
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201 | static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
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202 | {
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203 | const unsigned char *p;
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204 | unsigned char hdr_buf[16], *buf = NULL;
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205 | unsigned int bitlen, magic, length;
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206 | int isdss;
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207 | EVP_PKEY *ret = NULL;
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208 | if (BIO_read(in, hdr_buf, 16) != 16) {
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209 | PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
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210 | return NULL;
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211 | }
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212 | p = hdr_buf;
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213 | if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
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214 | return NULL;
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215 |
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216 | length = blob_length(bitlen, isdss, ispub);
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217 | if (length > BLOB_MAX_LENGTH) {
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218 | PEMerr(PEM_F_DO_B2I_BIO, PEM_R_HEADER_TOO_LONG);
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219 | return NULL;
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220 | }
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221 | buf = OPENSSL_malloc(length);
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222 | if (buf == NULL) {
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223 | PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
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224 | goto err;
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225 | }
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226 | p = buf;
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227 | if (BIO_read(in, buf, length) != (int)length) {
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228 | PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
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229 | goto err;
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230 | }
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231 |
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232 | if (isdss)
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233 | ret = b2i_dss(&p, bitlen, ispub);
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234 | else
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235 | ret = b2i_rsa(&p, bitlen, ispub);
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236 |
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237 | err:
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238 | OPENSSL_free(buf);
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239 | return ret;
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240 | }
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241 |
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242 | static EVP_PKEY *b2i_dss(const unsigned char **in,
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243 | unsigned int bitlen, int ispub)
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244 | {
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245 | const unsigned char *p = *in;
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246 | EVP_PKEY *ret = NULL;
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247 | DSA *dsa = NULL;
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248 | BN_CTX *ctx = NULL;
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249 | unsigned int nbyte;
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250 | BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL;
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251 | BIGNUM *pub_key = NULL;
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252 |
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253 | nbyte = (bitlen + 7) >> 3;
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254 |
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255 | dsa = DSA_new();
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256 | ret = EVP_PKEY_new();
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257 | if (dsa == NULL || ret == NULL)
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258 | goto memerr;
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259 | if (!read_lebn(&p, nbyte, &pbn))
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260 | goto memerr;
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261 |
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262 | if (!read_lebn(&p, 20, &qbn))
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263 | goto memerr;
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264 |
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265 | if (!read_lebn(&p, nbyte, &gbn))
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266 | goto memerr;
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267 |
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268 | if (ispub) {
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269 | if (!read_lebn(&p, nbyte, &pub_key))
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270 | goto memerr;
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271 | } else {
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272 | if (!read_lebn(&p, 20, &priv_key))
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273 | goto memerr;
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274 |
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275 | /* Calculate public key */
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276 | pub_key = BN_new();
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277 | if (pub_key == NULL)
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278 | goto memerr;
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279 | if ((ctx = BN_CTX_new()) == NULL)
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280 | goto memerr;
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281 |
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282 | if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx))
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283 | goto memerr;
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284 |
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285 | BN_CTX_free(ctx);
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286 | }
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287 | if (!DSA_set0_pqg(dsa, pbn, qbn, gbn))
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288 | goto memerr;
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289 | pbn = qbn = gbn = NULL;
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290 | if (!DSA_set0_key(dsa, pub_key, priv_key))
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291 | goto memerr;
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292 |
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293 | EVP_PKEY_set1_DSA(ret, dsa);
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294 | DSA_free(dsa);
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295 | *in = p;
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296 | return ret;
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297 |
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298 | memerr:
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299 | PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
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300 | DSA_free(dsa);
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301 | BN_free(pbn);
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302 | BN_free(qbn);
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303 | BN_free(gbn);
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304 | BN_free(pub_key);
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305 | BN_free(priv_key);
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306 | EVP_PKEY_free(ret);
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307 | BN_CTX_free(ctx);
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308 | return NULL;
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309 | }
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310 |
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311 | static EVP_PKEY *b2i_rsa(const unsigned char **in,
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312 | unsigned int bitlen, int ispub)
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313 | {
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314 | const unsigned char *pin = *in;
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315 | EVP_PKEY *ret = NULL;
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316 | BIGNUM *e = NULL, *n = NULL, *d = NULL;
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317 | BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
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318 | RSA *rsa = NULL;
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319 | unsigned int nbyte, hnbyte;
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320 | nbyte = (bitlen + 7) >> 3;
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321 | hnbyte = (bitlen + 15) >> 4;
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322 | rsa = RSA_new();
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323 | ret = EVP_PKEY_new();
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324 | if (rsa == NULL || ret == NULL)
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325 | goto memerr;
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326 | e = BN_new();
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327 | if (e == NULL)
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328 | goto memerr;
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329 | if (!BN_set_word(e, read_ledword(&pin)))
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330 | goto memerr;
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331 | if (!read_lebn(&pin, nbyte, &n))
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332 | goto memerr;
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333 | if (!ispub) {
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334 | if (!read_lebn(&pin, hnbyte, &p))
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335 | goto memerr;
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336 | if (!read_lebn(&pin, hnbyte, &q))
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337 | goto memerr;
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338 | if (!read_lebn(&pin, hnbyte, &dmp1))
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339 | goto memerr;
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340 | if (!read_lebn(&pin, hnbyte, &dmq1))
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341 | goto memerr;
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342 | if (!read_lebn(&pin, hnbyte, &iqmp))
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343 | goto memerr;
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344 | if (!read_lebn(&pin, nbyte, &d))
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345 | goto memerr;
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346 | RSA_set0_factors(rsa, p, q);
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347 | RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp);
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348 | }
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349 | RSA_set0_key(rsa, n, e, d);
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350 |
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351 | EVP_PKEY_set1_RSA(ret, rsa);
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352 | RSA_free(rsa);
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353 | *in = pin;
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354 | return ret;
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355 | memerr:
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356 | PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
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357 | BN_free(e);
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358 | BN_free(n);
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359 | BN_free(p);
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360 | BN_free(q);
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361 | BN_free(dmp1);
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362 | BN_free(dmq1);
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363 | BN_free(iqmp);
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364 | BN_free(d);
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365 | RSA_free(rsa);
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366 | EVP_PKEY_free(ret);
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367 | return NULL;
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368 | }
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369 |
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370 | EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
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371 | {
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372 | return do_b2i(in, length, 0);
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373 | }
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374 |
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375 | EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
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376 | {
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377 | return do_b2i(in, length, 1);
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378 | }
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379 |
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380 | EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
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381 | {
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382 | return do_b2i_bio(in, 0);
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383 | }
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384 |
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385 | EVP_PKEY *b2i_PublicKey_bio(BIO *in)
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386 | {
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387 | return do_b2i_bio(in, 1);
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388 | }
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389 |
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390 | static void write_ledword(unsigned char **out, unsigned int dw)
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391 | {
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392 | unsigned char *p = *out;
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393 | *p++ = dw & 0xff;
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394 | *p++ = (dw >> 8) & 0xff;
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395 | *p++ = (dw >> 16) & 0xff;
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396 | *p++ = (dw >> 24) & 0xff;
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397 | *out = p;
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398 | }
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399 |
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400 | static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
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401 | {
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402 | BN_bn2lebinpad(bn, *out, len);
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403 | *out += len;
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404 | }
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405 |
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406 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
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407 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
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408 |
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409 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
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410 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
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411 |
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412 | static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
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413 | {
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414 | unsigned char *p;
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415 | unsigned int bitlen, magic = 0, keyalg;
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416 | int outlen, noinc = 0;
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417 | int pktype = EVP_PKEY_id(pk);
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418 | if (pktype == EVP_PKEY_DSA) {
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419 | bitlen = check_bitlen_dsa(EVP_PKEY_get0_DSA(pk), ispub, &magic);
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420 | keyalg = MS_KEYALG_DSS_SIGN;
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421 | } else if (pktype == EVP_PKEY_RSA) {
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422 | bitlen = check_bitlen_rsa(EVP_PKEY_get0_RSA(pk), ispub, &magic);
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423 | keyalg = MS_KEYALG_RSA_KEYX;
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424 | } else
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425 | return -1;
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426 | if (bitlen == 0)
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427 | return -1;
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428 | outlen = 16 + blob_length(bitlen,
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429 | keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
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430 | if (out == NULL)
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431 | return outlen;
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432 | if (*out)
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433 | p = *out;
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434 | else {
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435 | p = OPENSSL_malloc(outlen);
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436 | if (p == NULL)
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437 | return -1;
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438 | *out = p;
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439 | noinc = 1;
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440 | }
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441 | if (ispub)
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442 | *p++ = MS_PUBLICKEYBLOB;
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443 | else
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444 | *p++ = MS_PRIVATEKEYBLOB;
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---|
445 | *p++ = 0x2;
|
---|
446 | *p++ = 0;
|
---|
447 | *p++ = 0;
|
---|
448 | write_ledword(&p, keyalg);
|
---|
449 | write_ledword(&p, magic);
|
---|
450 | write_ledword(&p, bitlen);
|
---|
451 | if (keyalg == MS_KEYALG_DSS_SIGN)
|
---|
452 | write_dsa(&p, EVP_PKEY_get0_DSA(pk), ispub);
|
---|
453 | else
|
---|
454 | write_rsa(&p, EVP_PKEY_get0_RSA(pk), ispub);
|
---|
455 | if (!noinc)
|
---|
456 | *out += outlen;
|
---|
457 | return outlen;
|
---|
458 | }
|
---|
459 |
|
---|
460 | static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
|
---|
461 | {
|
---|
462 | unsigned char *tmp = NULL;
|
---|
463 | int outlen, wrlen;
|
---|
464 | outlen = do_i2b(&tmp, pk, ispub);
|
---|
465 | if (outlen < 0)
|
---|
466 | return -1;
|
---|
467 | wrlen = BIO_write(out, tmp, outlen);
|
---|
468 | OPENSSL_free(tmp);
|
---|
469 | if (wrlen == outlen)
|
---|
470 | return outlen;
|
---|
471 | return -1;
|
---|
472 | }
|
---|
473 |
|
---|
474 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
|
---|
475 | {
|
---|
476 | int bitlen;
|
---|
477 | const BIGNUM *p = NULL, *q = NULL, *g = NULL;
|
---|
478 | const BIGNUM *pub_key = NULL, *priv_key = NULL;
|
---|
479 |
|
---|
480 | DSA_get0_pqg(dsa, &p, &q, &g);
|
---|
481 | DSA_get0_key(dsa, &pub_key, &priv_key);
|
---|
482 | bitlen = BN_num_bits(p);
|
---|
483 | if ((bitlen & 7) || (BN_num_bits(q) != 160)
|
---|
484 | || (BN_num_bits(g) > bitlen))
|
---|
485 | goto badkey;
|
---|
486 | if (ispub) {
|
---|
487 | if (BN_num_bits(pub_key) > bitlen)
|
---|
488 | goto badkey;
|
---|
489 | *pmagic = MS_DSS1MAGIC;
|
---|
490 | } else {
|
---|
491 | if (BN_num_bits(priv_key) > 160)
|
---|
492 | goto badkey;
|
---|
493 | *pmagic = MS_DSS2MAGIC;
|
---|
494 | }
|
---|
495 |
|
---|
496 | return bitlen;
|
---|
497 | badkey:
|
---|
498 | PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
|
---|
499 | return 0;
|
---|
500 | }
|
---|
501 |
|
---|
502 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
|
---|
503 | {
|
---|
504 | int nbyte, hnbyte, bitlen;
|
---|
505 | const BIGNUM *e;
|
---|
506 |
|
---|
507 | RSA_get0_key(rsa, NULL, &e, NULL);
|
---|
508 | if (BN_num_bits(e) > 32)
|
---|
509 | goto badkey;
|
---|
510 | bitlen = RSA_bits(rsa);
|
---|
511 | nbyte = RSA_size(rsa);
|
---|
512 | hnbyte = (bitlen + 15) >> 4;
|
---|
513 | if (ispub) {
|
---|
514 | *pmagic = MS_RSA1MAGIC;
|
---|
515 | return bitlen;
|
---|
516 | } else {
|
---|
517 | const BIGNUM *d, *p, *q, *iqmp, *dmp1, *dmq1;
|
---|
518 |
|
---|
519 | *pmagic = MS_RSA2MAGIC;
|
---|
520 |
|
---|
521 | /*
|
---|
522 | * For private key each component must fit within nbyte or hnbyte.
|
---|
523 | */
|
---|
524 | RSA_get0_key(rsa, NULL, NULL, &d);
|
---|
525 | if (BN_num_bytes(d) > nbyte)
|
---|
526 | goto badkey;
|
---|
527 | RSA_get0_factors(rsa, &p, &q);
|
---|
528 | RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
|
---|
529 | if ((BN_num_bytes(iqmp) > hnbyte)
|
---|
530 | || (BN_num_bytes(p) > hnbyte)
|
---|
531 | || (BN_num_bytes(q) > hnbyte)
|
---|
532 | || (BN_num_bytes(dmp1) > hnbyte)
|
---|
533 | || (BN_num_bytes(dmq1) > hnbyte))
|
---|
534 | goto badkey;
|
---|
535 | }
|
---|
536 | return bitlen;
|
---|
537 | badkey:
|
---|
538 | PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
|
---|
539 | return 0;
|
---|
540 | }
|
---|
541 |
|
---|
542 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub)
|
---|
543 | {
|
---|
544 | int nbyte, hnbyte;
|
---|
545 | const BIGNUM *n, *d, *e, *p, *q, *iqmp, *dmp1, *dmq1;
|
---|
546 |
|
---|
547 | nbyte = RSA_size(rsa);
|
---|
548 | hnbyte = (RSA_bits(rsa) + 15) >> 4;
|
---|
549 | RSA_get0_key(rsa, &n, &e, &d);
|
---|
550 | write_lebn(out, e, 4);
|
---|
551 | write_lebn(out, n, nbyte);
|
---|
552 | if (ispub)
|
---|
553 | return;
|
---|
554 | RSA_get0_factors(rsa, &p, &q);
|
---|
555 | RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
|
---|
556 | write_lebn(out, p, hnbyte);
|
---|
557 | write_lebn(out, q, hnbyte);
|
---|
558 | write_lebn(out, dmp1, hnbyte);
|
---|
559 | write_lebn(out, dmq1, hnbyte);
|
---|
560 | write_lebn(out, iqmp, hnbyte);
|
---|
561 | write_lebn(out, d, nbyte);
|
---|
562 | }
|
---|
563 |
|
---|
564 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
|
---|
565 | {
|
---|
566 | int nbyte;
|
---|
567 | const BIGNUM *p = NULL, *q = NULL, *g = NULL;
|
---|
568 | const BIGNUM *pub_key = NULL, *priv_key = NULL;
|
---|
569 |
|
---|
570 | DSA_get0_pqg(dsa, &p, &q, &g);
|
---|
571 | DSA_get0_key(dsa, &pub_key, &priv_key);
|
---|
572 | nbyte = BN_num_bytes(p);
|
---|
573 | write_lebn(out, p, nbyte);
|
---|
574 | write_lebn(out, q, 20);
|
---|
575 | write_lebn(out, g, nbyte);
|
---|
576 | if (ispub)
|
---|
577 | write_lebn(out, pub_key, nbyte);
|
---|
578 | else
|
---|
579 | write_lebn(out, priv_key, 20);
|
---|
580 | /* Set "invalid" for seed structure values */
|
---|
581 | memset(*out, 0xff, 24);
|
---|
582 | *out += 24;
|
---|
583 | return;
|
---|
584 | }
|
---|
585 |
|
---|
586 | int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
|
---|
587 | {
|
---|
588 | return do_i2b_bio(out, pk, 0);
|
---|
589 | }
|
---|
590 |
|
---|
591 | int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
|
---|
592 | {
|
---|
593 | return do_i2b_bio(out, pk, 1);
|
---|
594 | }
|
---|
595 |
|
---|
596 | # ifndef OPENSSL_NO_RC4
|
---|
597 |
|
---|
598 | static int do_PVK_header(const unsigned char **in, unsigned int length,
|
---|
599 | int skip_magic,
|
---|
600 | unsigned int *psaltlen, unsigned int *pkeylen)
|
---|
601 | {
|
---|
602 | const unsigned char *p = *in;
|
---|
603 | unsigned int pvk_magic, is_encrypted;
|
---|
604 | if (skip_magic) {
|
---|
605 | if (length < 20) {
|
---|
606 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
|
---|
607 | return 0;
|
---|
608 | }
|
---|
609 | } else {
|
---|
610 | if (length < 24) {
|
---|
611 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
|
---|
612 | return 0;
|
---|
613 | }
|
---|
614 | pvk_magic = read_ledword(&p);
|
---|
615 | if (pvk_magic != MS_PVKMAGIC) {
|
---|
616 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
|
---|
617 | return 0;
|
---|
618 | }
|
---|
619 | }
|
---|
620 | /* Skip reserved */
|
---|
621 | p += 4;
|
---|
622 | /*
|
---|
623 | * keytype =
|
---|
624 | */ read_ledword(&p);
|
---|
625 | is_encrypted = read_ledword(&p);
|
---|
626 | *psaltlen = read_ledword(&p);
|
---|
627 | *pkeylen = read_ledword(&p);
|
---|
628 |
|
---|
629 | if (*pkeylen > PVK_MAX_KEYLEN || *psaltlen > PVK_MAX_SALTLEN)
|
---|
630 | return 0;
|
---|
631 |
|
---|
632 | if (is_encrypted && !*psaltlen) {
|
---|
633 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
|
---|
634 | return 0;
|
---|
635 | }
|
---|
636 |
|
---|
637 | *in = p;
|
---|
638 | return 1;
|
---|
639 | }
|
---|
640 |
|
---|
641 | static int derive_pvk_key(unsigned char *key,
|
---|
642 | const unsigned char *salt, unsigned int saltlen,
|
---|
643 | const unsigned char *pass, int passlen)
|
---|
644 | {
|
---|
645 | EVP_MD_CTX *mctx = EVP_MD_CTX_new();
|
---|
646 | int rv = 1;
|
---|
647 | if (mctx == NULL
|
---|
648 | || !EVP_DigestInit_ex(mctx, EVP_sha1(), NULL)
|
---|
649 | || !EVP_DigestUpdate(mctx, salt, saltlen)
|
---|
650 | || !EVP_DigestUpdate(mctx, pass, passlen)
|
---|
651 | || !EVP_DigestFinal_ex(mctx, key, NULL))
|
---|
652 | rv = 0;
|
---|
653 |
|
---|
654 | EVP_MD_CTX_free(mctx);
|
---|
655 | return rv;
|
---|
656 | }
|
---|
657 |
|
---|
658 | static EVP_PKEY *do_PVK_body(const unsigned char **in,
|
---|
659 | unsigned int saltlen, unsigned int keylen,
|
---|
660 | pem_password_cb *cb, void *u)
|
---|
661 | {
|
---|
662 | EVP_PKEY *ret = NULL;
|
---|
663 | const unsigned char *p = *in;
|
---|
664 | unsigned int magic;
|
---|
665 | unsigned char *enctmp = NULL, *q;
|
---|
666 |
|
---|
667 | EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
|
---|
668 | if (saltlen) {
|
---|
669 | char psbuf[PEM_BUFSIZE];
|
---|
670 | unsigned char keybuf[20];
|
---|
671 | int enctmplen, inlen;
|
---|
672 | if (cb)
|
---|
673 | inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
|
---|
674 | else
|
---|
675 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
|
---|
676 | if (inlen <= 0) {
|
---|
677 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
|
---|
678 | goto err;
|
---|
679 | }
|
---|
680 | enctmp = OPENSSL_malloc(keylen + 8);
|
---|
681 | if (enctmp == NULL) {
|
---|
682 | PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
|
---|
683 | goto err;
|
---|
684 | }
|
---|
685 | if (!derive_pvk_key(keybuf, p, saltlen,
|
---|
686 | (unsigned char *)psbuf, inlen))
|
---|
687 | goto err;
|
---|
688 | p += saltlen;
|
---|
689 | /* Copy BLOBHEADER across, decrypt rest */
|
---|
690 | memcpy(enctmp, p, 8);
|
---|
691 | p += 8;
|
---|
692 | if (keylen < 8) {
|
---|
693 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
|
---|
694 | goto err;
|
---|
695 | }
|
---|
696 | inlen = keylen - 8;
|
---|
697 | q = enctmp + 8;
|
---|
698 | if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
|
---|
699 | goto err;
|
---|
700 | if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
|
---|
701 | goto err;
|
---|
702 | if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
|
---|
703 | goto err;
|
---|
704 | magic = read_ledword((const unsigned char **)&q);
|
---|
705 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
|
---|
706 | q = enctmp + 8;
|
---|
707 | memset(keybuf + 5, 0, 11);
|
---|
708 | if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
|
---|
709 | goto err;
|
---|
710 | OPENSSL_cleanse(keybuf, 20);
|
---|
711 | if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
|
---|
712 | goto err;
|
---|
713 | if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
|
---|
714 | goto err;
|
---|
715 | magic = read_ledword((const unsigned char **)&q);
|
---|
716 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
|
---|
717 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
|
---|
718 | goto err;
|
---|
719 | }
|
---|
720 | } else
|
---|
721 | OPENSSL_cleanse(keybuf, 20);
|
---|
722 | p = enctmp;
|
---|
723 | }
|
---|
724 |
|
---|
725 | ret = b2i_PrivateKey(&p, keylen);
|
---|
726 | err:
|
---|
727 | EVP_CIPHER_CTX_free(cctx);
|
---|
728 | OPENSSL_free(enctmp);
|
---|
729 | return ret;
|
---|
730 | }
|
---|
731 |
|
---|
732 | EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
|
---|
733 | {
|
---|
734 | unsigned char pvk_hdr[24], *buf = NULL;
|
---|
735 | const unsigned char *p;
|
---|
736 | int buflen;
|
---|
737 | EVP_PKEY *ret = NULL;
|
---|
738 | unsigned int saltlen, keylen;
|
---|
739 | if (BIO_read(in, pvk_hdr, 24) != 24) {
|
---|
740 | PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
|
---|
741 | return NULL;
|
---|
742 | }
|
---|
743 | p = pvk_hdr;
|
---|
744 |
|
---|
745 | if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
|
---|
746 | return 0;
|
---|
747 | buflen = (int)keylen + saltlen;
|
---|
748 | buf = OPENSSL_malloc(buflen);
|
---|
749 | if (buf == NULL) {
|
---|
750 | PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
|
---|
751 | return 0;
|
---|
752 | }
|
---|
753 | p = buf;
|
---|
754 | if (BIO_read(in, buf, buflen) != buflen) {
|
---|
755 | PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
|
---|
756 | goto err;
|
---|
757 | }
|
---|
758 | ret = do_PVK_body(&p, saltlen, keylen, cb, u);
|
---|
759 |
|
---|
760 | err:
|
---|
761 | OPENSSL_clear_free(buf, buflen);
|
---|
762 | return ret;
|
---|
763 | }
|
---|
764 |
|
---|
765 | static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
|
---|
766 | pem_password_cb *cb, void *u)
|
---|
767 | {
|
---|
768 | int outlen = 24, pklen;
|
---|
769 | unsigned char *p = NULL, *start = NULL, *salt = NULL;
|
---|
770 | EVP_CIPHER_CTX *cctx = NULL;
|
---|
771 | if (enclevel)
|
---|
772 | outlen += PVK_SALTLEN;
|
---|
773 | pklen = do_i2b(NULL, pk, 0);
|
---|
774 | if (pklen < 0)
|
---|
775 | return -1;
|
---|
776 | outlen += pklen;
|
---|
777 | if (out == NULL)
|
---|
778 | return outlen;
|
---|
779 | if (*out != NULL) {
|
---|
780 | p = *out;
|
---|
781 | } else {
|
---|
782 | start = p = OPENSSL_malloc(outlen);
|
---|
783 | if (p == NULL) {
|
---|
784 | PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
|
---|
785 | return -1;
|
---|
786 | }
|
---|
787 | }
|
---|
788 |
|
---|
789 | cctx = EVP_CIPHER_CTX_new();
|
---|
790 | if (cctx == NULL)
|
---|
791 | goto error;
|
---|
792 |
|
---|
793 | write_ledword(&p, MS_PVKMAGIC);
|
---|
794 | write_ledword(&p, 0);
|
---|
795 | if (EVP_PKEY_id(pk) == EVP_PKEY_DSA)
|
---|
796 | write_ledword(&p, MS_KEYTYPE_SIGN);
|
---|
797 | else
|
---|
798 | write_ledword(&p, MS_KEYTYPE_KEYX);
|
---|
799 | write_ledword(&p, enclevel ? 1 : 0);
|
---|
800 | write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
|
---|
801 | write_ledword(&p, pklen);
|
---|
802 | if (enclevel) {
|
---|
803 | if (RAND_bytes(p, PVK_SALTLEN) <= 0)
|
---|
804 | goto error;
|
---|
805 | salt = p;
|
---|
806 | p += PVK_SALTLEN;
|
---|
807 | }
|
---|
808 | do_i2b(&p, pk, 0);
|
---|
809 | if (enclevel != 0) {
|
---|
810 | char psbuf[PEM_BUFSIZE];
|
---|
811 | unsigned char keybuf[20];
|
---|
812 | int enctmplen, inlen;
|
---|
813 | if (cb)
|
---|
814 | inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
|
---|
815 | else
|
---|
816 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
|
---|
817 | if (inlen <= 0) {
|
---|
818 | PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
|
---|
819 | goto error;
|
---|
820 | }
|
---|
821 | if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
|
---|
822 | (unsigned char *)psbuf, inlen))
|
---|
823 | goto error;
|
---|
824 | if (enclevel == 1)
|
---|
825 | memset(keybuf + 5, 0, 11);
|
---|
826 | p = salt + PVK_SALTLEN + 8;
|
---|
827 | if (!EVP_EncryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
|
---|
828 | goto error;
|
---|
829 | OPENSSL_cleanse(keybuf, 20);
|
---|
830 | if (!EVP_DecryptUpdate(cctx, p, &enctmplen, p, pklen - 8))
|
---|
831 | goto error;
|
---|
832 | if (!EVP_DecryptFinal_ex(cctx, p + enctmplen, &enctmplen))
|
---|
833 | goto error;
|
---|
834 | }
|
---|
835 |
|
---|
836 | EVP_CIPHER_CTX_free(cctx);
|
---|
837 |
|
---|
838 | if (*out == NULL)
|
---|
839 | *out = start;
|
---|
840 |
|
---|
841 | return outlen;
|
---|
842 |
|
---|
843 | error:
|
---|
844 | EVP_CIPHER_CTX_free(cctx);
|
---|
845 | if (*out == NULL)
|
---|
846 | OPENSSL_free(start);
|
---|
847 | return -1;
|
---|
848 | }
|
---|
849 |
|
---|
850 | int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel,
|
---|
851 | pem_password_cb *cb, void *u)
|
---|
852 | {
|
---|
853 | unsigned char *tmp = NULL;
|
---|
854 | int outlen, wrlen;
|
---|
855 | outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
|
---|
856 | if (outlen < 0)
|
---|
857 | return -1;
|
---|
858 | wrlen = BIO_write(out, tmp, outlen);
|
---|
859 | OPENSSL_free(tmp);
|
---|
860 | if (wrlen == outlen) {
|
---|
861 | PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);
|
---|
862 | return outlen;
|
---|
863 | }
|
---|
864 | return -1;
|
---|
865 | }
|
---|
866 |
|
---|
867 | # endif
|
---|
868 |
|
---|
869 | #endif
|
---|