diff options
Diffstat (limited to 'Crypto/src/crypto/engines/VMPCKSA3Engine.cs')
-rw-r--r-- | Crypto/src/crypto/engines/VMPCKSA3Engine.cs | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/Crypto/src/crypto/engines/VMPCKSA3Engine.cs b/Crypto/src/crypto/engines/VMPCKSA3Engine.cs new file mode 100644 index 000000000..95b6813b7 --- /dev/null +++ b/Crypto/src/crypto/engines/VMPCKSA3Engine.cs @@ -0,0 +1,51 @@ +using System; + +namespace Org.BouncyCastle.Crypto.Engines +{ + public class VmpcKsa3Engine + : VmpcEngine + { + public override string AlgorithmName + { + get { return "VMPC-KSA3"; } + } + + protected override void InitKey( + byte[] keyBytes, + byte[] ivBytes) + { + s = 0; + P = new byte[256]; + for (int i = 0; i < 256; i++) + { + P[i] = (byte) i; + } + + for (int m = 0; m < 768; m++) + { + s = P[(s + P[m & 0xff] + keyBytes[m % keyBytes.Length]) & 0xff]; + byte temp = P[m & 0xff]; + P[m & 0xff] = P[s & 0xff]; + P[s & 0xff] = temp; + } + + for (int m = 0; m < 768; m++) + { + s = P[(s + P[m & 0xff] + ivBytes[m % ivBytes.Length]) & 0xff]; + byte temp = P[m & 0xff]; + P[m & 0xff] = P[s & 0xff]; + P[s & 0xff] = temp; + } + + for (int m = 0; m < 768; m++) + { + s = P[(s + P[m & 0xff] + keyBytes[m % keyBytes.Length]) & 0xff]; + byte temp = P[m & 0xff]; + P[m & 0xff] = P[s & 0xff]; + P[s & 0xff] = temp; + } + + n = 0; + } + } +} |