Mercurial > trustbridge > nss-cmake-static
annotate nss/lib/util/dersubr.c @ 1:247cffdc9b89
Add a pesodo config file for inlcude directories and library names
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Mon, 28 Jul 2014 13:00:06 +0200 |
parents | 1e5118fa0cb1 |
children |
rev | line source |
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0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public |
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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4 |
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5 #include "secder.h" |
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6 #include <limits.h> |
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7 #include "secerr.h" |
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8 |
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9 int |
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10 DER_LengthLength(PRUint32 len) |
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11 { |
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12 if (len > 127) { |
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13 if (len > 255) { |
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14 if (len > 65535L) { |
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15 if (len > 16777215L) { |
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16 return 5; |
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17 } else { |
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18 return 4; |
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19 } |
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20 } else { |
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21 return 3; |
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22 } |
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23 } else { |
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24 return 2; |
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25 } |
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26 } else { |
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27 return 1; |
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28 } |
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29 } |
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30 |
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31 unsigned char * |
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32 DER_StoreHeader(unsigned char *buf, unsigned int code, PRUint32 len) |
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33 { |
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34 unsigned char b[4]; |
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35 |
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36 b[0] = (unsigned char)(len >> 24); |
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37 b[1] = (unsigned char)(len >> 16); |
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38 b[2] = (unsigned char)(len >> 8); |
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39 b[3] = (unsigned char)len; |
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40 if ((code & DER_TAGNUM_MASK) == DER_SET |
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41 || (code & DER_TAGNUM_MASK) == DER_SEQUENCE) |
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42 code |= DER_CONSTRUCTED; |
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43 *buf++ = code; |
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44 if (len > 127) { |
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45 if (len > 255) { |
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46 if (len > 65535) { |
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47 if (len > 16777215) { |
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48 *buf++ = 0x84; |
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49 *buf++ = b[0]; |
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50 *buf++ = b[1]; |
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51 *buf++ = b[2]; |
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52 *buf++ = b[3]; |
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53 } else { |
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54 *buf++ = 0x83; |
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55 *buf++ = b[1]; |
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56 *buf++ = b[2]; |
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57 *buf++ = b[3]; |
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58 } |
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59 } else { |
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60 *buf++ = 0x82; |
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61 *buf++ = b[2]; |
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62 *buf++ = b[3]; |
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63 } |
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64 } else { |
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65 *buf++ = 0x81; |
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66 *buf++ = b[3]; |
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67 } |
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68 } else { |
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69 *buf++ = b[3]; |
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70 } |
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71 return buf; |
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72 } |
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73 |
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74 /* |
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75 * XXX This should be rewritten, generalized, to take a long instead |
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76 * of a PRInt32. |
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77 */ |
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78 SECStatus |
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79 DER_SetInteger(PLArenaPool *arena, SECItem *it, PRInt32 i) |
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80 { |
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81 unsigned char bb[4]; |
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82 unsigned len; |
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83 |
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84 bb[0] = (unsigned char) (i >> 24); |
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85 bb[1] = (unsigned char) (i >> 16); |
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86 bb[2] = (unsigned char) (i >> 8); |
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87 bb[3] = (unsigned char) (i); |
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88 |
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89 /* |
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90 ** Small integers are encoded in a single byte. Larger integers |
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91 ** require progressively more space. |
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92 */ |
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93 if (i < -128) { |
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94 if (i < -32768L) { |
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95 if (i < -8388608L) { |
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96 len = 4; |
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97 } else { |
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98 len = 3; |
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99 } |
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100 } else { |
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101 len = 2; |
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102 } |
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103 } else if (i > 127) { |
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104 if (i > 32767L) { |
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105 if (i > 8388607L) { |
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106 len = 4; |
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107 } else { |
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108 len = 3; |
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109 } |
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110 } else { |
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111 len = 2; |
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112 } |
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113 } else { |
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114 len = 1; |
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115 } |
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116 it->data = (unsigned char*) PORT_ArenaAlloc(arena, len); |
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117 if (!it->data) { |
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118 return SECFailure; |
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119 } |
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120 it->len = len; |
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121 PORT_Memcpy(it->data, bb + (4 - len), len); |
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122 return SECSuccess; |
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123 } |
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124 |
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125 /* |
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126 * XXX This should be rewritten, generalized, to take an unsigned long instead |
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127 * of a PRUint32. |
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128 */ |
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129 SECStatus |
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130 DER_SetUInteger(PLArenaPool *arena, SECItem *it, PRUint32 ui) |
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131 { |
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132 unsigned char bb[5]; |
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133 int len; |
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134 |
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135 bb[0] = 0; |
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136 bb[1] = (unsigned char) (ui >> 24); |
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137 bb[2] = (unsigned char) (ui >> 16); |
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138 bb[3] = (unsigned char) (ui >> 8); |
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139 bb[4] = (unsigned char) (ui); |
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140 |
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141 /* |
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142 ** Small integers are encoded in a single byte. Larger integers |
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143 ** require progressively more space. |
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144 */ |
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145 if (ui > 0x7f) { |
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146 if (ui > 0x7fff) { |
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147 if (ui > 0x7fffffL) { |
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148 if (ui >= 0x80000000L) { |
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149 len = 5; |
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150 } else { |
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151 len = 4; |
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152 } |
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153 } else { |
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154 len = 3; |
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155 } |
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156 } else { |
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157 len = 2; |
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158 } |
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159 } else { |
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160 len = 1; |
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161 } |
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162 |
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163 it->data = (unsigned char *)PORT_ArenaAlloc(arena, len); |
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164 if (it->data == NULL) { |
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165 return SECFailure; |
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166 } |
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167 |
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168 it->len = len; |
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169 PORT_Memcpy(it->data, bb + (sizeof(bb) - len), len); |
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170 |
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171 return SECSuccess; |
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172 } |
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173 |
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174 /* |
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175 ** Convert a der encoded *signed* integer into a machine integral value. |
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176 ** If an underflow/overflow occurs, sets error code and returns min/max. |
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177 */ |
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178 long |
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179 DER_GetInteger(const SECItem *it) |
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180 { |
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181 long ival = 0; |
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182 unsigned len = it->len; |
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183 unsigned char *cp = it->data; |
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184 unsigned long overflow = 0x1ffUL << (((sizeof(ival) - 1) * 8) - 1); |
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185 unsigned long ofloinit; |
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186 |
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187 PORT_Assert(len); |
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188 if (!len) { |
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189 PORT_SetError(SEC_ERROR_INPUT_LEN); |
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190 return 0; |
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191 } |
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192 |
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193 if (*cp & 0x80) |
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194 ival = -1L; |
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195 ofloinit = ival & overflow; |
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196 |
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197 while (len) { |
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198 if ((ival & overflow) != ofloinit) { |
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199 PORT_SetError(SEC_ERROR_BAD_DER); |
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200 if (ival < 0) { |
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201 return LONG_MIN; |
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202 } |
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203 return LONG_MAX; |
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204 } |
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205 ival = ival << 8; |
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206 ival |= *cp++; |
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207 --len; |
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208 } |
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209 return ival; |
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210 } |
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211 |
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212 /* |
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213 ** Convert a der encoded *unsigned* integer into a machine integral value. |
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214 ** If an overflow occurs, sets error code and returns max. |
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215 */ |
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216 unsigned long |
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217 DER_GetUInteger(SECItem *it) |
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218 { |
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219 unsigned long ival = 0; |
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220 unsigned len = it->len; |
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221 unsigned char *cp = it->data; |
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222 unsigned long overflow = 0xffUL << ((sizeof(ival) - 1) * 8); |
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223 |
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224 PORT_Assert(len); |
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225 if (!len) { |
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226 PORT_SetError(SEC_ERROR_INPUT_LEN); |
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227 return 0; |
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228 } |
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229 |
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230 /* Cannot put a negative value into an unsigned container. */ |
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231 if (*cp & 0x80) { |
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232 PORT_SetError(SEC_ERROR_BAD_DER); |
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233 return 0; |
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234 } |
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235 |
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236 while (len) { |
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237 if (ival & overflow) { |
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238 PORT_SetError(SEC_ERROR_BAD_DER); |
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239 return ULONG_MAX; |
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240 } |
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241 ival = ival << 8; |
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242 ival |= *cp++; |
1e5118fa0cb1
This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff
changeset
|
243 --len; |
1e5118fa0cb1
This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff
changeset
|
244 } |
1e5118fa0cb1
This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff
changeset
|
245 return ival; |
1e5118fa0cb1
This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff
changeset
|
246 } |