[C#/MAUI/.NET5] HIGHT ECB 모드를 사용해 암호화/복호화하기

■ HIGHT ECB 모드를 사용해 암호화/복호화하는 방법을 보여준다.

▶ HIGHTECB.cs


using System;

namespace TestProject
{
    /// <summary>
    /// HIGHT ECB
    /// </summary>
    public class HIGHTECB
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// HIGHT 델타 베열
        /// </summary>
        private readonly byte[] hightDeltaArray =
        {
            0x5a, 0x6d, 0x36, 0x1b, 0x0d, 0x06, 0x03, 0x41,
            0x60, 0x30, 0x18, 0x4c, 0x66, 0x33, 0x59, 0x2c,
            0x56, 0x2b, 0x15, 0x4a, 0x65, 0x72, 0x39, 0x1c,
            0x4e, 0x67, 0x73, 0x79, 0x3c, 0x5e, 0x6f, 0x37,
            0x5b, 0x2d, 0x16, 0x0b, 0x05, 0x42, 0x21, 0x50,
            0x28, 0x54, 0x2a, 0x55, 0x6a, 0x75, 0x7a, 0x7d,
            0x3e, 0x5f, 0x2f, 0x17, 0x4b, 0x25, 0x52, 0x29,
            0x14, 0x0a, 0x45, 0x62, 0x31, 0x58, 0x6c, 0x76,
            0x3b, 0x1d, 0x0e, 0x47, 0x63, 0x71, 0x78, 0x7c,
            0x7e, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x43, 0x61,
            0x70, 0x38, 0x5c, 0x6e, 0x77, 0x7b, 0x3d, 0x1e,
            0x4f, 0x27, 0x53, 0x69, 0x34, 0x1a, 0x4d, 0x26,
            0x13, 0x49, 0x24, 0x12, 0x09, 0x04, 0x02, 0x01,
            0x40, 0x20, 0x10, 0x08, 0x44, 0x22, 0x11, 0x48,
            0x64, 0x32, 0x19, 0x0c, 0x46, 0x23, 0x51, 0x68,
            0x74, 0x3a, 0x5d, 0x2e, 0x57, 0x6b, 0x35, 0x5a
        };

        /// <summary>
        /// HIGHT F0 배열
        /// </summary>
        private readonly byte[] hightF0Array =
        {
            0x00, 0x86, 0x0d, 0x8b, 0x1a, 0x9c, 0x17, 0x91,
            0x34, 0xb2, 0x39, 0xbf, 0x2e, 0xa8, 0x23, 0xa5,
            0x68, 0xee, 0x65, 0xe3, 0x72, 0xf4, 0x7f, 0xf9,
            0x5c, 0xda, 0x51, 0xd7, 0x46, 0xc0, 0x4b, 0xcd,
            0xd0, 0x56, 0xdd, 0x5b, 0xca, 0x4c, 0xc7, 0x41,
            0xe4, 0x62, 0xe9, 0x6f, 0xfe, 0x78, 0xf3, 0x75,
            0xb8, 0x3e, 0xb5, 0x33, 0xa2, 0x24, 0xaf, 0x29,
            0x8c, 0x0a, 0x81, 0x07, 0x96, 0x10, 0x9b, 0x1d,
            0xa1, 0x27, 0xac, 0x2a, 0xbb, 0x3d, 0xb6, 0x30,
            0x95, 0x13, 0x98, 0x1e, 0x8f, 0x09, 0x82, 0x04,
            0xc9, 0x4f, 0xc4, 0x42, 0xd3, 0x55, 0xde, 0x58,
            0xfd, 0x7b, 0xf0, 0x76, 0xe7, 0x61, 0xea, 0x6c,
            0x71, 0xf7, 0x7c, 0xfa, 0x6b, 0xed, 0x66, 0xe0,
            0x45, 0xc3, 0x48, 0xce, 0x5f, 0xd9, 0x52, 0xd4,
            0x19, 0x9f, 0x14, 0x92, 0x03, 0x85, 0x0e, 0x88,
            0x2d, 0xab, 0x20, 0xa6, 0x37, 0xb1, 0x3a, 0xbc,
            0x43, 0xc5, 0x4e, 0xc8, 0x59, 0xdf, 0x54, 0xd2,
            0x77, 0xf1, 0x7a, 0xfc, 0x6d, 0xeb, 0x60, 0xe6,
            0x2b, 0xad, 0x26, 0xa0, 0x31, 0xb7, 0x3c, 0xba,
            0x1f, 0x99, 0x12, 0x94, 0x05, 0x83, 0x08, 0x8e,
            0x93, 0x15, 0x9e, 0x18, 0x89, 0x0f, 0x84, 0x02,
            0xa7, 0x21, 0xaa, 0x2c, 0xbd, 0x3b, 0xb0, 0x36,
            0xfb, 0x7d, 0xf6, 0x70, 0xe1, 0x67, 0xec, 0x6a,
            0xcf, 0x49, 0xc2, 0x44, 0xd5, 0x53, 0xd8, 0x5e,
            0xe2, 0x64, 0xef, 0x69, 0xf8, 0x7e, 0xf5, 0x73,
            0xd6, 0x50, 0xdb, 0x5d, 0xcc, 0x4a, 0xc1, 0x47,
            0x8a, 0x0c, 0x87, 0x01, 0x90, 0x16, 0x9d, 0x1b,
            0xbe, 0x38, 0xb3, 0x35, 0xa4, 0x22, 0xa9, 0x2f,
            0x32, 0xb4, 0x3f, 0xb9, 0x28, 0xae, 0x25, 0xa3,
            0x06, 0x80, 0x0b, 0x8d, 0x1c, 0x9a, 0x11, 0x97,
            0x5a, 0xdc, 0x57, 0xd1, 0x40, 0xc6, 0x4d, 0xcb,
            0x6e, 0xe8, 0x63, 0xe5, 0x74, 0xf2, 0x79, 0xff
        };

        /// <summary>
        /// HIGHT F1 배열
        /// </summary>
        private readonly byte[] hightF1Array =
        {
            0x00, 0x58, 0xb0, 0xe8, 0x61, 0x39, 0xd1, 0x89,
            0xc2, 0x9a, 0x72, 0x2a, 0xa3, 0xfb, 0x13, 0x4b,
            0x85, 0xdd, 0x35, 0x6d, 0xe4, 0xbc, 0x54, 0x0c,
            0x47, 0x1f, 0xf7, 0xaf, 0x26, 0x7e, 0x96, 0xce,
            0x0b, 0x53, 0xbb, 0xe3, 0x6a, 0x32, 0xda, 0x82,
            0xc9, 0x91, 0x79, 0x21, 0xa8, 0xf0, 0x18, 0x40,
            0x8e, 0xd6, 0x3e, 0x66, 0xef, 0xb7, 0x5f, 0x07,
            0x4c, 0x14, 0xfc, 0xa4, 0x2d, 0x75, 0x9d, 0xc5,
            0x16, 0x4e, 0xa6, 0xfe, 0x77, 0x2f, 0xc7, 0x9f,
            0xd4, 0x8c, 0x64, 0x3c, 0xb5, 0xed, 0x05, 0x5d,
            0x93, 0xcb, 0x23, 0x7b, 0xf2, 0xaa, 0x42, 0x1a,
            0x51, 0x09, 0xe1, 0xb9, 0x30, 0x68, 0x80, 0xd8,
            0x1d, 0x45, 0xad, 0xf5, 0x7c, 0x24, 0xcc, 0x94,
            0xdf, 0x87, 0x6f, 0x37, 0xbe, 0xe6, 0x0e, 0x56,
            0x98, 0xc0, 0x28, 0x70, 0xf9, 0xa1, 0x49, 0x11,
            0x5a, 0x02, 0xea, 0xb2, 0x3b, 0x63, 0x8b, 0xd3,
            0x2c, 0x74, 0x9c, 0xc4, 0x4d, 0x15, 0xfd, 0xa5,
            0xee, 0xb6, 0x5e, 0x06, 0x8f, 0xd7, 0x3f, 0x67,
            0xa9, 0xf1, 0x19, 0x41, 0xc8, 0x90, 0x78, 0x20,
            0x6b, 0x33, 0xdb, 0x83, 0x0a, 0x52, 0xba, 0xe2,
            0x27, 0x7f, 0x97, 0xcf, 0x46, 0x1e, 0xf6, 0xae,
            0xe5, 0xbd, 0x55, 0x0d, 0x84, 0xdc, 0x34, 0x6c,
            0xa2, 0xfa, 0x12, 0x4a, 0xc3, 0x9b, 0x73, 0x2b,
            0x60, 0x38, 0xd0, 0x88, 0x01, 0x59, 0xb1, 0xe9,
            0x3a, 0x62, 0x8a, 0xd2, 0x5b, 0x03, 0xeb, 0xb3,
            0xf8, 0xa0, 0x48, 0x10, 0x99, 0xc1, 0x29, 0x71,
            0xbf, 0xe7, 0x0f, 0x57, 0xde, 0x86, 0x6e, 0x36,
            0x7d, 0x25, 0xcd, 0x95, 0x1c, 0x44, 0xac, 0xf4,
            0x31, 0x69, 0x81, 0xd9, 0x50, 0x08, 0xe0, 0xb8,
            0xf3, 0xab, 0x43, 0x1b, 0x92, 0xca, 0x22, 0x7a,
            0xb4, 0xec, 0x04, 0x5c, 0xd5, 0x8d, 0x65, 0x3d,
            0x76, 0x2e, 0xc6, 0x9e, 0x17, 0x4f, 0xa7, 0xff
        };

        /// <summary>
        /// 스케줄 키 배열
        /// </summary>
        private byte[] scheduleKeyArray = new byte[136];

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - HIGHTECB(userKeyArray)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="userKeyArray">사용자 키 배열</param>
        public HIGHTECB(byte[] userKeyArray)
        {
            SetScheduleKey(userKeyArray);
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 암호화하기 - Encrypt(sourceArray)

        /// <summary>
        /// 암호화하기
        /// </summary>
        /// <param name="sourceArray">소스 배열</param>
        /// <returns>암호화 배열</returns>
        public byte[] Encrypt(byte[] sourceArray)
        {
            int length;

            if(sourceArray.Length == 0)
            {
                return null;
            }

            if((sourceArray.Length % 8) != 0)
            {
                length = sourceArray.Length + (8 - (sourceArray.Length % 8));
            }
            else
            {
                length = sourceArray.Length;
            }

            byte[] targetArray            = new byte[length];
            byte[] sourceTemporaryArray   = new byte[8];
            byte[] targetTemporaryArray   = new byte[8];
            byte[] sourceArrayWithPadding = new byte[length];

            Array.Copy(sourceArray, sourceArrayWithPadding, sourceArray.Length);

            for(int i = 0; i < (int)(length / 8); i++)
            {
                Array.Copy(sourceArrayWithPadding, i * 8, sourceTemporaryArray, 0, 8);

                EncryptBlock(sourceTemporaryArray, targetTemporaryArray);

                Array.Copy(targetTemporaryArray, 0, targetArray, i * 8, 8);
            }

            return targetArray;
        }

        #endregion
        #region 복호화하기 - Decrypt(sourceArray)

        /// <summary>
        /// 복호화하기
        /// </summary>
        /// <param name="sourceArray">소스 배열</param>
        /// <returns>복호화 배열</returns>
        public byte[] Decrypt(byte[] sourceArray)
        {
            int length;

            if(sourceArray.Length == 0)
            {
                return null;
            }

            if((sourceArray.Length % 8) != 0)
            {
                length = sourceArray.Length + (8 - (sourceArray.Length % 8));
            }
            else
            {
                length = sourceArray.Length;
            }

            byte[] targetArray            = new byte[length];
            byte[] sourceTemporaryArray   = new byte[8];
            byte[] targetTemporaryArray   = new byte[8];
            byte[] sourceArrayWithPadding = new byte[length];

            Array.Copy(sourceArray, sourceArrayWithPadding, sourceArray.Length);

            for(int i = 0; i < (int)(length / 8); i++)
            {
                Array.Copy(sourceArrayWithPadding, i * 8, sourceTemporaryArray, 0, 8);

                DecryptBlock(sourceTemporaryArray, targetTemporaryArray);

                Array.Copy(targetTemporaryArray, 0, targetArray, i * 8, 8);
            }

            return targetArray;
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 스케줄 키 설정하기 - SetScheduleKey(userKeyArray)

        /// <summary>
        /// 스케줄 키 설정하기
        /// </summary>
        /// <param name="userKeyArray">사용자 키 배열</param>
        private void SetScheduleKey(byte[] userKeyArray)
        {
            for(int i = 0; i < 4; i++)
            {
                this.scheduleKeyArray[i    ] = userKeyArray[i + 12];
                this.scheduleKeyArray[i + 4] = userKeyArray[i     ];
            }

            for(int i = 0; i < 8; i++)
            {
                for(int j = 0; j < 8; j++)
                {
                    this.scheduleKeyArray[8 + 16 * i + j] = (byte)((userKeyArray[(j - i) & 7] + this.hightDeltaArray[(16 * i + j)]) & 0xff);
                }
                for (int j = 0; j < 8; j++)
                {
                    this.scheduleKeyArray[8 + 16 * i + j + 8] = (byte)((userKeyArray[((j - i) & 7) + 8] + this.hightDeltaArray[16 * i + j + 8]) & 0xff);
                }
            }
        }

        #endregion
        #region 블럭 암호화하기 - EncryptBlock(sourceArray, targetArray)

        /// <summary>
        /// 블럭 암호화하기
        /// </summary>
        /// <param name="sourceArray">소스 배열</param>
        /// <param name="targetArray">타겟 배열</param>
        private void EncryptBlock(byte[] sourceArray, byte[] targetArray)
        {
            byte[] temporaryArray = new byte[8];

            temporaryArray[1] = sourceArray[1];
            temporaryArray[3] = sourceArray[3];
            temporaryArray[5] = sourceArray[5];
            temporaryArray[7] = sourceArray[7];

            temporaryArray[0] = (byte)((sourceArray[0] + this.scheduleKeyArray[0]) & 0xff);
            temporaryArray[2] = (byte)((sourceArray[2] ^ this.scheduleKeyArray[1])       );
            temporaryArray[4] = (byte)((sourceArray[4] + this.scheduleKeyArray[2]) & 0xff);
            temporaryArray[6] = (byte)((sourceArray[6] ^ this.scheduleKeyArray[3])       );

            void HIGHT_ENC(int k, int i0, int i1, int i2, int i3, int i4, int i5, int i6, int i7)
            {
                temporaryArray[i0] = (byte)((temporaryArray[i0] ^ (this.hightF0Array[temporaryArray[i1]] + this.scheduleKeyArray[4 * k + 3])) & 0xff);
                temporaryArray[i2] = (byte)((temporaryArray[i2] + (this.hightF1Array[temporaryArray[i3]] ^ this.scheduleKeyArray[4 * k + 2])) & 0xff);
                temporaryArray[i4] = (byte)((temporaryArray[i4] ^ (this.hightF0Array[temporaryArray[i5]] + this.scheduleKeyArray[4 * k + 1])) & 0xff);
                temporaryArray[i6] = (byte)((temporaryArray[i6] + (this.hightF1Array[temporaryArray[i7]] ^ this.scheduleKeyArray[4 * k + 0])) & 0xff);
            }

            HIGHT_ENC( 2, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_ENC( 3, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_ENC( 4, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_ENC( 5, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_ENC( 6, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_ENC( 7, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_ENC( 8, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_ENC( 9, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_ENC(10, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_ENC(11, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_ENC(12, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_ENC(13, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_ENC(14, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_ENC(15, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_ENC(16, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_ENC(17, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_ENC(18, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_ENC(19, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_ENC(20, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_ENC(21, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_ENC(22, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_ENC(23, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_ENC(24, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_ENC(25, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_ENC(26, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_ENC(27, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_ENC(28, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_ENC(29, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_ENC(30, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_ENC(31, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_ENC(32, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_ENC(33, 0, 7, 6, 5, 4, 3, 2, 1);

            targetArray[1] = (byte)(temporaryArray[2] & 0xff);
            targetArray[3] = (byte)(temporaryArray[4] & 0xff);
            targetArray[5] = (byte)(temporaryArray[6] & 0xff);
            targetArray[7] = (byte)(temporaryArray[0] & 0xff);

            targetArray[0] = (byte)((temporaryArray[1] + this.scheduleKeyArray[4]) & 0xff);
            targetArray[2] = (byte)((temporaryArray[3] ^ this.scheduleKeyArray[5]) & 0xff);
            targetArray[4] = (byte)((temporaryArray[5] + this.scheduleKeyArray[6]) & 0xff);
            targetArray[6] = (byte)((temporaryArray[7] ^ this.scheduleKeyArray[7]) & 0xff);
        }

        #endregion
        #region 블럭 복호화하기 - DecryptBlock(sourceArray, targetArray)

        /// <summary>
        /// 블럭 복호화하기
        /// </summary>
        /// <param name="sourceArray">소스 배열</param>
        /// <param name="targetArray">타겟 배열</param>
        private void DecryptBlock(byte[] sourceArray, byte[] targetArray)
        {
            byte[] temporaryArray = new byte[8];

            temporaryArray[2] = sourceArray[1];
            temporaryArray[4] = sourceArray[3];
            temporaryArray[6] = sourceArray[5];
            temporaryArray[0] = sourceArray[7];

            void HIGHT_DEC(int k, int i0, int i1, int i2, int i3, int i4, int i5, int i6, int i7)
            {
                temporaryArray[i1] = (byte)((temporaryArray[i1] - (this.hightF1Array[temporaryArray[i2]] ^ this.scheduleKeyArray[4 * k + 2])) & 0xff);
                temporaryArray[i3] = (byte)((temporaryArray[i3] ^ (this.hightF0Array[temporaryArray[i4]] + this.scheduleKeyArray[4 * k + 1])) & 0xff);
                temporaryArray[i5] = (byte)((temporaryArray[i5] - (this.hightF1Array[temporaryArray[i6]] ^ this.scheduleKeyArray[4 * k + 0])) & 0xff);
                temporaryArray[i7] = (byte)((temporaryArray[i7] ^ (this.hightF0Array[temporaryArray[i0]] + this.scheduleKeyArray[4 * k + 3])) & 0xff);
            }

            temporaryArray[1] = (byte)(sourceArray[0] - this.scheduleKeyArray[4]);
            temporaryArray[3] = (byte)(sourceArray[2] ^ this.scheduleKeyArray[5]);
            temporaryArray[5] = (byte)(sourceArray[4] - this.scheduleKeyArray[6]);
            temporaryArray[7] = (byte)(sourceArray[6] ^ this.scheduleKeyArray[7]);

            HIGHT_DEC(33, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_DEC(32, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_DEC(31, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_DEC(30, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_DEC(29, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_DEC(28, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_DEC(27, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_DEC(26, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_DEC(25, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_DEC(24, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_DEC(23, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_DEC(22, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_DEC(21, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_DEC(20, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_DEC(19, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_DEC(18, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_DEC(17, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_DEC(16, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_DEC(15, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_DEC(14, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_DEC(13, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_DEC(12, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_DEC(11, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_DEC(10, 6, 5, 4, 3, 2, 1, 0, 7);
            HIGHT_DEC( 9, 7, 6, 5, 4, 3, 2, 1, 0);
            HIGHT_DEC( 8, 0, 7, 6, 5, 4, 3, 2, 1);
            HIGHT_DEC( 7, 1, 0, 7, 6, 5, 4, 3, 2);
            HIGHT_DEC( 6, 2, 1, 0, 7, 6, 5, 4, 3);
            HIGHT_DEC( 5, 3, 2, 1, 0, 7, 6, 5, 4);
            HIGHT_DEC( 4, 4, 3, 2, 1, 0, 7, 6, 5);
            HIGHT_DEC( 3, 5, 4, 3, 2, 1, 0, 7, 6);
            HIGHT_DEC( 2, 6, 5, 4, 3, 2, 1, 0, 7);

            targetArray[1] = (byte)(temporaryArray[1] & 0xff);
            targetArray[3] = (byte)(temporaryArray[3] & 0xff);
            targetArray[5] = (byte)(temporaryArray[5] & 0xff);
            targetArray[7] = (byte)(temporaryArray[7] & 0xff);

            targetArray[0] = (byte)((temporaryArray[0] - this.scheduleKeyArray[0]) & 0xff);
            targetArray[2] = (byte)((temporaryArray[2] ^ this.scheduleKeyArray[1]) & 0xff);
            targetArray[4] = (byte)((temporaryArray[4] - this.scheduleKeyArray[2]) & 0xff);
            targetArray[6] = (byte)((temporaryArray[6] ^ this.scheduleKeyArray[3]) & 0xff);
        }

        #endregion
    }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

using System;

namespace TestProject

{

/// <summary>

/// HIGHT ECB

/// </summary>

public class HIGHTECB

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// HIGHT 델타 베열

/// </summary>

private readonly byte[] hightDeltaArray =

{

0x5a, 0x6d, 0x36, 0x1b, 0x0d, 0x06, 0x03, 0x41,

0x60, 0x30, 0x18, 0x4c, 0x66, 0x33, 0x59, 0x2c,

0x56, 0x2b, 0x15, 0x4a, 0x65, 0x72, 0x39, 0x1c,

0x4e, 0x67, 0x73, 0x79, 0x3c, 0x5e, 0x6f, 0x37,

0x5b, 0x2d, 0x16, 0x0b, 0x05, 0x42, 0x21, 0x50,

0x28, 0x54, 0x2a, 0x55, 0x6a, 0x75, 0x7a, 0x7d,

0x3e, 0x5f, 0x2f, 0x17, 0x4b, 0x25, 0x52, 0x29,

0x14, 0x0a, 0x45, 0x62, 0x31, 0x58, 0x6c, 0x76,

0x3b, 0x1d, 0x0e, 0x47, 0x63, 0x71, 0x78, 0x7c,

0x7e, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x43, 0x61,

0x70, 0x38, 0x5c, 0x6e, 0x77, 0x7b, 0x3d, 0x1e,

0x4f, 0x27, 0x53, 0x69, 0x34, 0x1a, 0x4d, 0x26,

0x13, 0x49, 0x24, 0x12, 0x09, 0x04, 0x02, 0x01,

0x40, 0x20, 0x10, 0x08, 0x44, 0x22, 0x11, 0x48,

0x64, 0x32, 0x19, 0x0c, 0x46, 0x23, 0x51, 0x68,

0x74, 0x3a, 0x5d, 0x2e, 0x57, 0x6b, 0x35, 0x5a

};

/// <summary>

/// HIGHT F0 배열

/// </summary>

private readonly byte[] hightF0Array =

{

0x00, 0x86, 0x0d, 0x8b, 0x1a, 0x9c, 0x17, 0x91,

0x34, 0xb2, 0x39, 0xbf, 0x2e, 0xa8, 0x23, 0xa5,

0x68, 0xee, 0x65, 0xe3, 0x72, 0xf4, 0x7f, 0xf9,

0x5c, 0xda, 0x51, 0xd7, 0x46, 0xc0, 0x4b, 0xcd,

0xd0, 0x56, 0xdd, 0x5b, 0xca, 0x4c, 0xc7, 0x41,

0xe4, 0x62, 0xe9, 0x6f, 0xfe, 0x78, 0xf3, 0x75,

0xb8, 0x3e, 0xb5, 0x33, 0xa2, 0x24, 0xaf, 0x29,

0x8c, 0x0a, 0x81, 0x07, 0x96, 0x10, 0x9b, 0x1d,

0xa1, 0x27, 0xac, 0x2a, 0xbb, 0x3d, 0xb6, 0x30,

0x95, 0x13, 0x98, 0x1e, 0x8f, 0x09, 0x82, 0x04,

0xc9, 0x4f, 0xc4, 0x42, 0xd3, 0x55, 0xde, 0x58,

0xfd, 0x7b, 0xf0, 0x76, 0xe7, 0x61, 0xea, 0x6c,

0x71, 0xf7, 0x7c, 0xfa, 0x6b, 0xed, 0x66, 0xe0,

0x45, 0xc3, 0x48, 0xce, 0x5f, 0xd9, 0x52, 0xd4,

0x19, 0x9f, 0x14, 0x92, 0x03, 0x85, 0x0e, 0x88,

0x2d, 0xab, 0x20, 0xa6, 0x37, 0xb1, 0x3a, 0xbc,

0x43, 0xc5, 0x4e, 0xc8, 0x59, 0xdf, 0x54, 0xd2,

0x77, 0xf1, 0x7a, 0xfc, 0x6d, 0xeb, 0x60, 0xe6,

0x2b, 0xad, 0x26, 0xa0, 0x31, 0xb7, 0x3c, 0xba,

0x1f, 0x99, 0x12, 0x94, 0x05, 0x83, 0x08, 0x8e,

0x93, 0x15, 0x9e, 0x18, 0x89, 0x0f, 0x84, 0x02,

0xa7, 0x21, 0xaa, 0x2c, 0xbd, 0x3b, 0xb0, 0x36,

0xfb, 0x7d, 0xf6, 0x70, 0xe1, 0x67, 0xec, 0x6a,

0xcf, 0x49, 0xc2, 0x44, 0xd5, 0x53, 0xd8, 0x5e,

0xe2, 0x64, 0xef, 0x69, 0xf8, 0x7e, 0xf5, 0x73,

0xd6, 0x50, 0xdb, 0x5d, 0xcc, 0x4a, 0xc1, 0x47,

0x8a, 0x0c, 0x87, 0x01, 0x90, 0x16, 0x9d, 0x1b,

0xbe, 0x38, 0xb3, 0x35, 0xa4, 0x22, 0xa9, 0x2f,

0x32, 0xb4, 0x3f, 0xb9, 0x28, 0xae, 0x25, 0xa3,

0x06, 0x80, 0x0b, 0x8d, 0x1c, 0x9a, 0x11, 0x97,

0x5a, 0xdc, 0x57, 0xd1, 0x40, 0xc6, 0x4d, 0xcb,

0x6e, 0xe8, 0x63, 0xe5, 0x74, 0xf2, 0x79, 0xff

};

/// <summary>

/// HIGHT F1 배열

/// </summary>

private readonly byte[] hightF1Array =

{

0x00, 0x58, 0xb0, 0xe8, 0x61, 0x39, 0xd1, 0x89,

0xc2, 0x9a, 0x72, 0x2a, 0xa3, 0xfb, 0x13, 0x4b,

0x85, 0xdd, 0x35, 0x6d, 0xe4, 0xbc, 0x54, 0x0c,

0x47, 0x1f, 0xf7, 0xaf, 0x26, 0x7e, 0x96, 0xce,

0x0b, 0x53, 0xbb, 0xe3, 0x6a, 0x32, 0xda, 0x82,

0xc9, 0x91, 0x79, 0x21, 0xa8, 0xf0, 0x18, 0x40,

0x8e, 0xd6, 0x3e, 0x66, 0xef, 0xb7, 0x5f, 0x07,

0x4c, 0x14, 0xfc, 0xa4, 0x2d, 0x75, 0x9d, 0xc5,

0x16, 0x4e, 0xa6, 0xfe, 0x77, 0x2f, 0xc7, 0x9f,

0xd4, 0x8c, 0x64, 0x3c, 0xb5, 0xed, 0x05, 0x5d,

0x93, 0xcb, 0x23, 0x7b, 0xf2, 0xaa, 0x42, 0x1a,

0x51, 0x09, 0xe1, 0xb9, 0x30, 0x68, 0x80, 0xd8,

0x1d, 0x45, 0xad, 0xf5, 0x7c, 0x24, 0xcc, 0x94,

0xdf, 0x87, 0x6f, 0x37, 0xbe, 0xe6, 0x0e, 0x56,

0x98, 0xc0, 0x28, 0x70, 0xf9, 0xa1, 0x49, 0x11,

0x5a, 0x02, 0xea, 0xb2, 0x3b, 0x63, 0x8b, 0xd3,

0x2c, 0x74, 0x9c, 0xc4, 0x4d, 0x15, 0xfd, 0xa5,

0xee, 0xb6, 0x5e, 0x06, 0x8f, 0xd7, 0x3f, 0x67,

0xa9, 0xf1, 0x19, 0x41, 0xc8, 0x90, 0x78, 0x20,

0x6b, 0x33, 0xdb, 0x83, 0x0a, 0x52, 0xba, 0xe2,

0x27, 0x7f, 0x97, 0xcf, 0x46, 0x1e, 0xf6, 0xae,

0xe5, 0xbd, 0x55, 0x0d, 0x84, 0xdc, 0x34, 0x6c,

0xa2, 0xfa, 0x12, 0x4a, 0xc3, 0x9b, 0x73, 0x2b,

0x60, 0x38, 0xd0, 0x88, 0x01, 0x59, 0xb1, 0xe9,

0x3a, 0x62, 0x8a, 0xd2, 0x5b, 0x03, 0xeb, 0xb3,

0xf8, 0xa0, 0x48, 0x10, 0x99, 0xc1, 0x29, 0x71,

0xbf, 0xe7, 0x0f, 0x57, 0xde, 0x86, 0x6e, 0x36,

0x7d, 0x25, 0xcd, 0x95, 0x1c, 0x44, 0xac, 0xf4,

0x31, 0x69, 0x81, 0xd9, 0x50, 0x08, 0xe0, 0xb8,

0xf3, 0xab, 0x43, 0x1b, 0x92, 0xca, 0x22, 0x7a,

0xb4, 0xec, 0x04, 0x5c, 0xd5, 0x8d, 0x65, 0x3d,

0x76, 0x2e, 0xc6, 0x9e, 0x17, 0x4f, 0xa7, 0xff

};

/// <summary>

/// 스케줄 키 배열

/// </summary>

private byte[] scheduleKeyArray = new byte[136];

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - HIGHTECB(userKeyArray)

/// <summary>

/// 생성자

/// </summary>

/// <param name="userKeyArray">사용자 키 배열</param>

public HIGHTECB(byte[] userKeyArray)

{

SetScheduleKey(userKeyArray);

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 암호화하기 - Encrypt(sourceArray)

/// <summary>

/// 암호화하기

/// </summary>

/// <param name="sourceArray">소스 배열</param>

/// <returns>암호화 배열</returns>

public byte[] Encrypt(byte[] sourceArray)

{

int length;

if(sourceArray.Length == 0)

{

return null;

}

if((sourceArray.Length % 8) != 0)

{

length = sourceArray.Length + (8 - (sourceArray.Length % 8));

}

else

{

length = sourceArray.Length;

}

byte[] targetArray = new byte[length];

byte[] sourceTemporaryArray = new byte[8];

byte[] targetTemporaryArray = new byte[8];

byte[] sourceArrayWithPadding = new byte[length];

Array.Copy(sourceArray, sourceArrayWithPadding, sourceArray.Length);

for(int i = 0; i < (int)(length / 8); i++)

{

Array.Copy(sourceArrayWithPadding, i * 8, sourceTemporaryArray, 0, 8);

EncryptBlock(sourceTemporaryArray, targetTemporaryArray);

Array.Copy(targetTemporaryArray, 0, targetArray, i * 8, 8);

}

return targetArray;

}

#endregion

#region 복호화하기 - Decrypt(sourceArray)

/// <summary>

/// 복호화하기

/// </summary>

/// <param name="sourceArray">소스 배열</param>

/// <returns>복호화 배열</returns>

public byte[] Decrypt(byte[] sourceArray)

{

int length;

if(sourceArray.Length == 0)

{

return null;

}

if((sourceArray.Length % 8) != 0)

{

length = sourceArray.Length + (8 - (sourceArray.Length % 8));

}

else

{

length = sourceArray.Length;

}

byte[] targetArray = new byte[length];

byte[] sourceTemporaryArray = new byte[8];

byte[] targetTemporaryArray = new byte[8];

byte[] sourceArrayWithPadding = new byte[length];

Array.Copy(sourceArray, sourceArrayWithPadding, sourceArray.Length);

for(int i = 0; i < (int)(length / 8); i++)

{

Array.Copy(sourceArrayWithPadding, i * 8, sourceTemporaryArray, 0, 8);

DecryptBlock(sourceTemporaryArray, targetTemporaryArray);

Array.Copy(targetTemporaryArray, 0, targetArray, i * 8, 8);

}

return targetArray;

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 스케줄 키 설정하기 - SetScheduleKey(userKeyArray)

/// <summary>

/// 스케줄 키 설정하기

/// </summary>

/// <param name="userKeyArray">사용자 키 배열</param>

private void SetScheduleKey(byte[] userKeyArray)

{

for(int i = 0; i < 4; i++)

{

this.scheduleKeyArray[i ] = userKeyArray[i + 12];

this.scheduleKeyArray[i + 4] = userKeyArray[i ];

}

for(int i = 0; i < 8; i++)

{

for(int j = 0; j < 8; j++)

{

this.scheduleKeyArray[8 + 16 * i + j] = (byte)((userKeyArray[(j - i) & 7] + this.hightDeltaArray[(16 * i + j)]) & 0xff);

}

for (int j = 0; j < 8; j++)

{

this.scheduleKeyArray[8 + 16 * i + j + 8] = (byte)((userKeyArray[((j - i) & 7) + 8] + this.hightDeltaArray[16 * i + j + 8]) & 0xff);

}

#endregion

#region 블럭 암호화하기 - EncryptBlock(sourceArray, targetArray)

/// <summary>

/// 블럭 암호화하기

/// </summary>

/// <param name="sourceArray">소스 배열</param>

/// <param name="targetArray">타겟 배열</param>

private void EncryptBlock(byte[] sourceArray, byte[] targetArray)

{

byte[] temporaryArray = new byte[8];

temporaryArray[1] = sourceArray[1];

temporaryArray[3] = sourceArray[3];

temporaryArray[5] = sourceArray[5];

temporaryArray[7] = sourceArray[7];

temporaryArray[0] = (byte)((sourceArray[0] + this.scheduleKeyArray[0]) & 0xff);

temporaryArray[2] = (byte)((sourceArray[2] ^ this.scheduleKeyArray[1]) );

temporaryArray[4] = (byte)((sourceArray[4] + this.scheduleKeyArray[2]) & 0xff);

temporaryArray[6] = (byte)((sourceArray[6] ^ this.scheduleKeyArray[3]) );

void HIGHT_ENC(int k, int i0, int i1, int i2, int i3, int i4, int i5, int i6, int i7)

{

temporaryArray[i0] = (byte)((temporaryArray[i0] ^ (this.hightF0Array[temporaryArray[i1]] + this.scheduleKeyArray[4 * k + 3])) & 0xff);

temporaryArray[i2] = (byte)((temporaryArray[i2] + (this.hightF1Array[temporaryArray[i3]] ^ this.scheduleKeyArray[4 * k + 2])) & 0xff);

temporaryArray[i4] = (byte)((temporaryArray[i4] ^ (this.hightF0Array[temporaryArray[i5]] + this.scheduleKeyArray[4 * k + 1])) & 0xff);

temporaryArray[i6] = (byte)((temporaryArray[i6] + (this.hightF1Array[temporaryArray[i7]] ^ this.scheduleKeyArray[4 * k + 0])) & 0xff);

}

HIGHT_ENC( 2, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_ENC( 3, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_ENC( 4, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_ENC( 5, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_ENC( 6, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_ENC( 7, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_ENC( 8, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_ENC( 9, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_ENC(10, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_ENC(11, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_ENC(12, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_ENC(13, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_ENC(14, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_ENC(15, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_ENC(16, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_ENC(17, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_ENC(18, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_ENC(19, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_ENC(20, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_ENC(21, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_ENC(22, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_ENC(23, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_ENC(24, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_ENC(25, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_ENC(26, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_ENC(27, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_ENC(28, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_ENC(29, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_ENC(30, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_ENC(31, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_ENC(32, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_ENC(33, 0, 7, 6, 5, 4, 3, 2, 1);

targetArray[1] = (byte)(temporaryArray[2] & 0xff);

targetArray[3] = (byte)(temporaryArray[4] & 0xff);

targetArray[5] = (byte)(temporaryArray[6] & 0xff);

targetArray[7] = (byte)(temporaryArray[0] & 0xff);

targetArray[0] = (byte)((temporaryArray[1] + this.scheduleKeyArray[4]) & 0xff);

targetArray[2] = (byte)((temporaryArray[3] ^ this.scheduleKeyArray[5]) & 0xff);

targetArray[4] = (byte)((temporaryArray[5] + this.scheduleKeyArray[6]) & 0xff);

targetArray[6] = (byte)((temporaryArray[7] ^ this.scheduleKeyArray[7]) & 0xff);

}

#endregion

#region 블럭 복호화하기 - DecryptBlock(sourceArray, targetArray)

/// <summary>

/// 블럭 복호화하기

/// </summary>

/// <param name="sourceArray">소스 배열</param>

/// <param name="targetArray">타겟 배열</param>

private void DecryptBlock(byte[] sourceArray, byte[] targetArray)

{

byte[] temporaryArray = new byte[8];

temporaryArray[2] = sourceArray[1];

temporaryArray[4] = sourceArray[3];

temporaryArray[6] = sourceArray[5];

temporaryArray[0] = sourceArray[7];

void HIGHT_DEC(int k, int i0, int i1, int i2, int i3, int i4, int i5, int i6, int i7)

{

temporaryArray[i1] = (byte)((temporaryArray[i1] - (this.hightF1Array[temporaryArray[i2]] ^ this.scheduleKeyArray[4 * k + 2])) & 0xff);

temporaryArray[i3] = (byte)((temporaryArray[i3] ^ (this.hightF0Array[temporaryArray[i4]] + this.scheduleKeyArray[4 * k + 1])) & 0xff);

temporaryArray[i5] = (byte)((temporaryArray[i5] - (this.hightF1Array[temporaryArray[i6]] ^ this.scheduleKeyArray[4 * k + 0])) & 0xff);

temporaryArray[i7] = (byte)((temporaryArray[i7] ^ (this.hightF0Array[temporaryArray[i0]] + this.scheduleKeyArray[4 * k + 3])) & 0xff);

}

temporaryArray[1] = (byte)(sourceArray[0] - this.scheduleKeyArray[4]);

temporaryArray[3] = (byte)(sourceArray[2] ^ this.scheduleKeyArray[5]);

temporaryArray[5] = (byte)(sourceArray[4] - this.scheduleKeyArray[6]);

temporaryArray[7] = (byte)(sourceArray[6] ^ this.scheduleKeyArray[7]);

HIGHT_DEC(33, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_DEC(32, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_DEC(31, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_DEC(30, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_DEC(29, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_DEC(28, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_DEC(27, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_DEC(26, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_DEC(25, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_DEC(24, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_DEC(23, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_DEC(22, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_DEC(21, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_DEC(20, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_DEC(19, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_DEC(18, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_DEC(17, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_DEC(16, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_DEC(15, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_DEC(14, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_DEC(13, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_DEC(12, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_DEC(11, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_DEC(10, 6, 5, 4, 3, 2, 1, 0, 7);

HIGHT_DEC( 9, 7, 6, 5, 4, 3, 2, 1, 0);

HIGHT_DEC( 8, 0, 7, 6, 5, 4, 3, 2, 1);

HIGHT_DEC( 7, 1, 0, 7, 6, 5, 4, 3, 2);

HIGHT_DEC( 6, 2, 1, 0, 7, 6, 5, 4, 3);

HIGHT_DEC( 5, 3, 2, 1, 0, 7, 6, 5, 4);

HIGHT_DEC( 4, 4, 3, 2, 1, 0, 7, 6, 5);

HIGHT_DEC( 3, 5, 4, 3, 2, 1, 0, 7, 6);

HIGHT_DEC( 2, 6, 5, 4, 3, 2, 1, 0, 7);

targetArray[1] = (byte)(temporaryArray[1] & 0xff);

targetArray[3] = (byte)(temporaryArray[3] & 0xff);

targetArray[5] = (byte)(temporaryArray[5] & 0xff);

targetArray[7] = (byte)(temporaryArray[7] & 0xff);

targetArray[0] = (byte)((temporaryArray[0] - this.scheduleKeyArray[0]) & 0xff);

targetArray[2] = (byte)((temporaryArray[2] ^ this.scheduleKeyArray[1]) & 0xff);

targetArray[4] = (byte)((temporaryArray[4] - this.scheduleKeyArray[2]) & 0xff);

targetArray[6] = (byte)((temporaryArray[6] ^ this.scheduleKeyArray[3]) & 0xff);

}

#endregion

}

▶ Program.cs


using System;
using System.Text;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 데이터 출력하기 - PrintData(sourceArray)

        /// <summary>
        /// 데이터 출력하기
        /// </summary>
        /// <param name="sourceArray">소스 배열</param>
        private static void PrintData(byte[] sourceArray)
        {
            for(int i = 0; i < sourceArray.Length; i++)
            {
                Console.Write($"{sourceArray[i]:X2}");

                if(i < sourceArray.Length - 1)
                {
                    Console.Write(",");
                }
                else
                {
                    Console.WriteLine();
                }
            }
        }

        #endregion

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        private static void Main()
        {
            byte[] userKeyArray =
            {
                0x88, 0xe3, 0x4f, 0x8f, 0x08, 0x17, 0x79, 0xf1,
                0xe9, 0xf3, 0x94, 0x37, 0x0a, 0xd4, 0x05, 0x89
            };

            HIGHTECB ecb = new HIGHTECB(userKeyArray);

            string plainText = "테스트 문자열";

            Console.WriteLine($"평문 텍스트        : {plainText}");

            byte[] plainByteArray = Encoding.UTF8.GetBytes(plainText);

            Console.Write("평문 바이트 배열   : ");

            PrintData(plainByteArray);

            byte[] encryptedByteArray = ecb.Encrypt(plainByteArray);

            Console.Write("암호화 바이트 배열 : ");

            PrintData(encryptedByteArray);

            byte[] decryptedByteArray = ecb.Decrypt(encryptedByteArray);

            Console.Write("복호화 바이트 배열 : ");

            PrintData(decryptedByteArray);

            string decryptedText = Encoding.UTF8.GetString(decryptedByteArray);

            Console.WriteLine($"복호화 텍스트      : {decryptedText}");
        }

        #endregion
    }
}

using System;

using System.Text;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 데이터 출력하기 - PrintData(sourceArray)

/// <summary>

/// 데이터 출력하기

/// </summary>

/// <param name="sourceArray">소스 배열</param>

private static void PrintData(byte[] sourceArray)

{

for(int i = 0; i < sourceArray.Length; i++)

{

Console.Write($"{sourceArray[i]:X2}");

if(i < sourceArray.Length - 1)

{

Console.Write(",");

}

else

{

Console.WriteLine();

}

#endregion

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

private static void Main()

{

byte[] userKeyArray =

{

0x88, 0xe3, 0x4f, 0x8f, 0x08, 0x17, 0x79, 0xf1,

0xe9, 0xf3, 0x94, 0x37, 0x0a, 0xd4, 0x05, 0x89

};

HIGHTECB ecb = new HIGHTECB(userKeyArray);

string plainText = "테스트 문자열";

Console.WriteLine($"평문 텍스트 : {plainText}");

byte[] plainByteArray = Encoding.UTF8.GetBytes(plainText);

Console.Write("평문 바이트 배열 : ");

PrintData(plainByteArray);

byte[] encryptedByteArray = ecb.Encrypt(plainByteArray);

Console.Write("암호화 바이트 배열 : ");

PrintData(encryptedByteArray);

byte[] decryptedByteArray = ecb.Decrypt(encryptedByteArray);

Console.Write("복호화 바이트 배열 : ");

PrintData(decryptedByteArray);

string decryptedText = Encoding.UTF8.GetString(decryptedByteArray);

Console.WriteLine($"복호화 텍스트 : {decryptedText}");

}

#endregion

}

TestProject.zip

.NET5 C# MAUI MICROSOFT SECURITY

icodebroker

[C#/MAUI/.NET5] HIGHT ECB 모드를 사용해 암호화/복호화하기