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[feature/elliptic-curve] Add comment for generator 2 and sha1 hash function.

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This commit is contained in:
Andreas Fischer 2013-06-07 01:03:03 +02:00
parent 2fcbd77605
commit 61279f1fb6
1 changed files with 4 additions and 3 deletions
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7
phpseclib/Net/SSH2.php
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@ -1180,11 +1180,11 @@ class Net_SSH2 {
break; break;
} }
$kexHash = new Crypt_Hash('sha1'); // For both diffie-hellman-group1-sha1 and diffie-hellman-group14-sha1
$keyLength = min($keyLength, $kexHash->getLength()); // the generator field element is 2 (decimal) and the hash function is sha1.
$g = new Math_BigInteger(2); $g = new Math_BigInteger(2);
$prime = new Math_BigInteger($prime, 16); $prime = new Math_BigInteger($prime, 16);
$kexHash = new Crypt_Hash('sha1');
//$q = $p->bitwise_rightShift(1); //$q = $p->bitwise_rightShift(1);
/* To increase the speed of the key exchange, both client and server may /* To increase the speed of the key exchange, both client and server may
@ -1195,6 +1195,7 @@ class Net_SSH2 {
-- http://tools.ietf.org/html/rfc4419#section-6.2 */ -- http://tools.ietf.org/html/rfc4419#section-6.2 */
$one = new Math_BigInteger(1); $one = new Math_BigInteger(1);
$keyLength = min($keyLength, $kexHash->getLength());
$max = $one->bitwise_leftShift(16 * $keyLength)->subtract($one); // 2 * 8 * $keyLength $max = $one->bitwise_leftShift(16 * $keyLength)->subtract($one); // 2 * 8 * $keyLength
$x = $one->random($one, $max); $x = $one->random($one, $max);