diff options
Diffstat (limited to 'crypto/src/pqc/math/linearalgebra/LittleEndianConversions.cs')
| -rw-r--r-- | crypto/src/pqc/math/linearalgebra/LittleEndianConversions.cs | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/crypto/src/pqc/math/linearalgebra/LittleEndianConversions.cs b/crypto/src/pqc/math/linearalgebra/LittleEndianConversions.cs deleted file mode 100644 index 5b3215070..000000000 --- a/crypto/src/pqc/math/linearalgebra/LittleEndianConversions.cs +++ /dev/null @@ -1,195 +0,0 @@ - -using Org.BouncyCastle.Crypto.Utilities; - -namespace Org.BouncyCastle.Pqc.Math.LinearAlgebra -{ - /** - * This is a utility class containing data type conversions using little-endian - * byte order. - * - */ - class LittleEndianConversions - { - /** - * Default constructor (private). - */ - private LittleEndianConversions() - { - // empty - } - - /** - * Convert an octet string of length 4 to an integer. No length checking is - * performed. - * - * @param input the byte array holding the octet string - * @return an integer representing the octet string <tt>input</tt> - * @throws ArithmeticException if the length of the given octet string is larger than 4. - */ - public static int OS2IP(byte[] input) - { - return (int)Pack.LE_To_UInt32(input); - } - - /** - * Convert an byte array of length 4 beginning at <tt>offset</tt> into an - * integer. - * - * @param input the byte array - * @param inOff the offset into the byte array - * @return the resulting integer - */ - public static int OS2IP(byte[] input, int inOff) - { - return (int)Pack.LE_To_UInt32(input, inOff); - } - - /** - * Convert a byte array of the given length beginning at <tt>offset</tt> - * into an integer. - * - * @param input the byte array - * @param inOff the offset into the byte array - * @param inLen the length of the encoding - * @return the resulting integer - */ - public static int OS2IP(byte[] input, int inOff, int inLen) - { - int result = 0; - for (int i = inLen - 1; i >= 0; i--) - { - result |= (input[inOff + i] & 0xff) << (8 * i); - } - return result; - } - - /** - * Convert a byte array of length 8 beginning at <tt>inOff</tt> into a - * long integer. - * - * @param input the byte array - * @param inOff the offset into the byte array - * @return the resulting long integer - */ - public static long OS2LIP(byte[] input, int inOff) - { - return (long)Pack.LE_To_UInt64(input, inOff); - } - - /** - * Convert an integer to an octet string of length 4. - * - * @param x the integer to convert - * @return the converted integer - */ - public static byte[] I2OSP(int x) - { - return Pack.UInt32_To_LE((uint)x); - } - - /** - * Convert an integer into a byte array beginning at the specified offset. - * - * @param value the integer to convert - * @param output the byte array to hold the result - * @param outOff the integer offset into the byte array - */ - public static void I2OSP(int value, byte[] output, int outOff) - { - Pack.UInt32_To_LE((uint)value, output, outOff); - } - - /** - * Convert an integer to a byte array beginning at the specified offset. No - * length checking is performed (i.e., if the integer cannot be encoded with - * <tt>length</tt> octets, it is truncated). - * - * @param value the integer to convert - * @param output the byte array to hold the result - * @param outOff the integer offset into the byte array - * @param outLen the length of the encoding - */ - public static void I2OSP(int value, byte[] output, int outOff, int outLen) - { - uint valueTmp = (uint)value; - for (int i = outLen - 1; i >= 0; i--) - { - output[outOff + i] = (byte)(valueTmp >> (8 * i)); - } - } - - /** - * Convert an integer to a byte array of length 8. - * - * @param input the integer to convert - * @return the converted integer - */ - public static byte[] I2OSP(long input) - { - return Pack.UInt64_To_LE((ulong)input); - } - - /** - * Convert an integer to a byte array of length 8. - * - * @param input the integer to convert - * @param output byte array holding the output - * @param outOff offset in output array where the result is stored - */ - public static void I2OSP(long input, byte[] output, int outOff) - { - Pack.UInt64_To_LE((ulong)input, output, outOff); - } - - /** - * Convert an int array to a byte array of the specified length. No length - * checking is performed (i.e., if the last integer cannot be encoded with - * <tt>length % 4</tt> octets, it is truncated). - * - * @param input the int array - * @param outLen the length of the converted array - * @return the converted array - */ - public static byte[] ToByteArray(int[] input, int outLen) - { - int intLen = input.Length; - byte[] result = new byte[outLen]; - int index = 0; - for (int i = 0; i <= intLen - 2; i++, index += 4) - { - I2OSP(input[i], result, index); - } - I2OSP(input[intLen - 1], result, index, outLen - index); - return result; - } - - /** - * Convert a byte array to an int array. - * - * @param input the byte array - * @return the converted array - */ - public static int[] ToIntArray(byte[] input) - { - int intLen = (input.Length + 3) / 4; - int lastLen = input.Length & 0x03; - int[] result = new int[intLen]; - - int index = 0; - for (int i = 0; i <= intLen - 2; i++, index += 4) - { - result[i] = OS2IP(input, index); - } - if (lastLen != 0) - { - result[intLen - 1] = OS2IP(input, index, lastLen); - } - else - { - result[intLen - 1] = OS2IP(input, index); - } - - return result; - } - } -} |