diff options
Diffstat (limited to 'crypto/src/crypto/util/Pack.cs')
| -rw-r--r-- | crypto/src/crypto/util/Pack.cs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/crypto/src/crypto/util/Pack.cs b/crypto/src/crypto/util/Pack.cs index 17bd3681f..3977d221e 100644 --- a/crypto/src/crypto/util/Pack.cs +++ b/crypto/src/crypto/util/Pack.cs @@ -522,6 +522,23 @@ namespace Org.BouncyCastle.Crypto.Utilities #endif } + internal static void UInt32_To_LE_High(uint n, byte[] bs, int off, int len) + { + UInt32_To_LE_Low(n >> ((4 - len) << 3), bs, off, len); + } + + internal static void UInt32_To_LE_Low(uint n, byte[] bs, int off, int len) + { + Debug.Assert(1 <= len && len <= 4); + + bs[off] = (byte)n; + for (int i = 1; i < len; ++i) + { + n >>= 8; + bs[off + i] = (byte)n; + } + } + internal static byte[] UInt32_To_LE(uint[] ns) { byte[] bs = new byte[4 * ns.Length]; @@ -649,6 +666,23 @@ namespace Org.BouncyCastle.Crypto.Utilities #endif } + internal static void UInt64_To_LE_High(ulong n, byte[] bs, int off, int len) + { + UInt64_To_LE_Low(n >> ((8 - len) << 3), bs, off, len); + } + + internal static void UInt64_To_LE_Low(ulong n, byte[] bs, int off, int len) + { + Debug.Assert(1 <= len && len <= 8); + + bs[off] = (byte)n; + for (int i = 1; i < len; ++i) + { + n >>= 8; + bs[off + i] = (byte)n; + } + } + internal static byte[] UInt64_To_LE(ulong[] ns) { byte[] bs = new byte[8 * ns.Length]; @@ -696,6 +730,25 @@ namespace Org.BouncyCastle.Crypto.Utilities #endif } + internal static ulong LE_To_UInt64_High(byte[] bs, int off, int len) + { + return LE_To_UInt64_Low(bs, off, len) << ((8 - len) << 3); + } + + internal static ulong LE_To_UInt64_Low(byte[] bs, int off, int len) + { + Debug.Assert(1 <= len && len <= 8); + + ulong result = bs[off]; + int pos = 0; + for (int i = 1; i < len; ++i) + { + pos += 8; + result |= (ulong)bs[off + i] << pos; + } + return result; + } + internal static void LE_To_UInt64(byte[] bs, int off, ulong[] ns) { for (int i = 0; i < ns.Length; ++i) |