1 files changed, 46 insertions, 0 deletions
diff --git a/Crypto/src/bcpg/Crc24.cs b/Crypto/src/bcpg/Crc24.cs
new file mode 100644
index 000000000..97846f4fb
--- /dev/null
+++ b/Crypto/src/bcpg/Crc24.cs
@@ -0,0 +1,46 @@
+using System;
+
+namespace Org.BouncyCastle.Bcpg
+{
+ public class Crc24
+ {
+ private const int Crc24Init = 0x0b704ce;
+ private const int Crc24Poly = 0x1864cfb;
+
+ private int crc = Crc24Init;
+
+ public Crc24()
+ {
+ }
+
+ public void Update(
+ int b)
+ {
+ crc ^= b << 16;
+ for (int i = 0; i < 8; i++)
+ {
+ crc <<= 1;
+ if ((crc & 0x1000000) != 0)
+ {
+ crc ^= Crc24Poly;
+ }
+ }
+ }
+
+ [Obsolete("Use 'Value' property instead")]
+ public int GetValue()
+ {
+ return crc;
+ }
+
+ public int Value
+ {
+ get { return crc; }
+ }
+
+ public void Reset()
+ {
+ crc = Crc24Init;
+ }
+ }
+}
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