nilsteampassnet /
TeamPass
| @@ 179-214 (lines=36) @@ | ||
| 176 | * @param string @text The string to encrypt |
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| 177 | * @return boolean Returns true |
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| 178 | */ |
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| 179 | public function encrypt(&$text) |
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| 180 | { |
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| 181 | // set the operation to decryption |
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| 182 | $this->operation(parent::ENCRYPT); |
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| 183 | ||
| 184 | $loops = 0; |
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| 185 | $key_sz = $this->keySize(); |
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| 186 | $blk_sz = $this->blockSize(); |
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| 187 | ||
| 188 | // if the key and block size is 16, do 10 rounds |
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| 189 | // if the key or block size is 24, and neither is longer than 24, do 12 rounds |
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| 190 | // if either key or block size is 32, do 14 rounds |
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| 191 | if ($key_sz == 16 && $blk_sz == 16) { |
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| 192 | $loops = 10; |
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| 193 | } else if (($key_sz == 24 || $blk_sz == 24) && $key_sz <= 24 && $blk_sz <= 24) { |
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| 194 | $loops = 12; |
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| 195 | } else if ($key_sz == 32 || $blk_sz == 32) { |
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| 196 | $loops = 14; |
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| 197 | } |
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| 198 | ||
| 199 | // now begin the encryption |
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| 200 | $this->addRoundKey($text, 0); |
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| 201 | ||
| 202 | for ($i = 1; $i <= $loops; ++$i) |
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| 203 | { |
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| 204 | $this->byteSub($text); |
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| 205 | $this->shiftRow($text); |
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| 206 | ||
| 207 | // the last iteration does not use mixColumn |
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| 208 | if ($i < $loops) { |
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| 209 | $this->mixColumn($text); |
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| 210 | } |
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| 211 | ||
| 212 | $this->addRoundKey($text, $i); |
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| 213 | } |
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| 214 | ||
| 215 | return true; |
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| 216 | } |
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| 217 | ||
| @@ 225-259 (lines=35) @@ | ||
| 222 | * @param string @text The string to decrypt |
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| 223 | * @return boolean Returns true |
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| 224 | */ |
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| 225 | public function decrypt(&$text) |
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| 226 | { |
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| 227 | // set the operation to decryption |
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| 228 | $this->operation(parent::DECRYPT); |
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| 229 | ||
| 230 | $loops = 0; |
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| 231 | $key_sz = $this->keySize(); |
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| 232 | $blk_sz = $this->blockSize(); |
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| 233 | ||
| 234 | // if the key and block size is 16, do 10 rounds |
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| 235 | // if the key or block size is 24, and neither is longer than 24, do 12 rounds |
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| 236 | // if either key or block size is 32, do 14 rounds |
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| 237 | if ($key_sz == 16 && $blk_sz == 16) { |
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| 238 | $loops = 10; |
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| 239 | } else if (($key_sz == 24 || $blk_sz == 24) && $key_sz <= 24 && $blk_sz <= 24) { |
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| 240 | $loops = 12; |
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| 241 | } else if ($key_sz == 32 || $blk_sz == 32) { |
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| 242 | $loops = 14; |
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| 243 | } |
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| 244 | ||
| 245 | // now begin the decryption |
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| 246 | $this->addRoundKey($text, 0); |
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| 247 | ||
| 248 | for ($i = 1; $i <= $loops; ++$i) |
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| 249 | { |
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| 250 | $this->shiftRow($text); |
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| 251 | $this->byteSub($text); |
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| 252 | $this->addRoundKey($text, $i); |
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| 253 | ||
| 254 | // the last iteration does not use mixColumn |
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| 255 | if ($i < $loops) { |
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| 256 | $this->mixColumn($text); |
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| 257 | } |
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| 258 | } |
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| 259 | ||
| 260 | return true; |
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| 261 | } |
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| 262 | ||
