\uba87\uac00\uc9c0 \uc554\ud638\ud654 \uae30\ubc95\uc744 \uc815\ub9ac\ud574 \ubcf4\ub824\ud569\ub2c8\ub2e4.<\/p>\n
SEED\/ARIA \ub294 \uad6d\uc0b0 \uc554\ud638\ud654 \uc54c\uace0\ub9ac\uc998\uc774\uace0,
\nAES \ub294 \ubbf8\uad6d\uc5d0\uc11c \uac1c\ubc1c\ub41c \uc554\ud638\ud654 \uc54c\uace0\ub9ac\uc998\uc774\ub2e4.<\/p>\n
\uc554\ud638\ud654 \uae30\ubc95\uc740 \ub370\uc774\ud0c0\ub97c \uc77c\uc815 \ud06c\uae30(8byte \ub610\ub294 16byte) \ub85c \ucabc\uac20 \ud6c4,
\n\uac01\uac01\uc758 \uc870\uac01\uc744 \uc554\ud638\ud654\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c\ub9cc \uc801\uc6a9\ub41c\ub2e4.<\/p>\n
\ub530\ub77c\uc11c, \ud55c \uc870\uac01(8byte \ub610\ub294 16byte)\uc758 \ubcf5\ud638\ud654\ub9cc \uc131\uacf5\ud558\uac8c \ub418\uba74,
\n\ub098\uba38\uc9c0 \uc804\ubd80\uc758 \ubcf5\ud638\ud654\ub3c4 \uc131\uacf5\ud55c\ub2e4\ub294 \ubb38\uc81c\uac00 \uc0dd\uae34\ub2e4.<\/p>\n
\uc5ec\uae30\uc11c \uc6b4\uc601 \ubaa8\ub4dc \ub77c\ub294 \uae30\ubc95\uc774 \uc0dd\uae34\ub2e4.
\n\uc608\ub97c \ub4e4\uc5b4 CBC(Cipher Block Chaining) Mode \uac19\uc740 \uacbd\uc6b0,
\n\uac01\uac01\uc758 \ube14\ub85d\uc744 XOR \uc5f0\uc0b0\uc744 \ud574\uc11c 2\uc911\uc73c\ub85c \uc554\ud638\ud654\ub97c \uc9c4\ud589\ud55c\ub2e4.<\/p>\n
\ub610 \ud558\ub098\uc758 \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud558\ub294\ub370 \uc77c\uc815 \ud06c\uae30(8byte \ub610\ub294 16byte) \ub85c \ub370\uc774\ud0c0\ub97c \ucabc\uac24 \ub54c,
\n\ud574\ub2f9 \ubc14\uc774\ud2b8\ub85c \ub098\ub204\uc5b4 \ub5a8\uc5b4\uc9c0\uc9c0 \uc54a\ub294 \ub370\uc774\ud0c0\ub294 \uc5b4\ub5bb\uac8c \uc554\ud638\ud654\ud560 \uac83\uc778\uac00\uc758 \ubb38\uc81c\uc778\ub2e4.<\/p>\n
\uc5ec\uae30\uc11c \ubd80\uc871\ud55c \ubd80\ubd84\uc744 \ud2b9\uc815 \ubb38\uc790\ub85c \ucc44\uc6cc\uc11c \uc77c\uc815\ud06c\uae30\ub85c \ub9de\ucdb0\uc8fc\ub294 \uc791\uc5c5\uc744 \ud558\uac8c\ub418\ub294\ub370,
\n\uc774\uac83\uc744 \ud328\ub529\uc774\ub77c\uace0 \ud55c\ub2e4.<\/p>\n
\uc870\uc2ec\ud560 \ubd80\ubd84\uc740 16\ubc14\uc774\ud2b8\uc640 \uac19\uc774 \uc0ac\uc774\uc988\uac00 \ub531 \ub5a8\uc5b4\uc9c0\ub294 \uacbd\uc6b0,
\n\ud328\ub529\uc744 \ud558\uc9c0 \uc54a\ub294 \uac83\uc774 \uc544\ub2c8\ub77c,
\n\ucd94\uac00\ub85c 16\ubc14\uc774\ud2b8\ub97c \ud328\ub529\ud55c\ub2e4\ub294 \uac83\uc774\ub2e4.<\/p>\n
\uacf5\uacf5\uae30\uad00 \ub0a9\ud488\uc774 \ud544\uc694\ud55c \uacbd\uc6b0 \uc368\uc57c \ud558\ub294 \uacbd\uc6b0\uac00 \uc0dd\uae34\ub2e4.<\/p>\n
dependencies {\n implementation group: 'org.bouncycastle', name: 'bcprov-jdk18on', version: '1.78.1'\n}<\/code><\/pre>\n\uc704 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c ARIA\/SEED \ub97c \uc9c0\uc6d0\ud574 \uc8fc\uace0 \uc788\ub2e4.
\nARIA\/CBC\/PKCS7Padding<\/code> \ubd80\ubd84\ub9cc \ubcc0\uacbd\ud574 \uc8fc\uba74 \uc554\ud638\ud654\ubc29\uc2dd\/\uc6b4\uc601\ubaa8\ub4dc\/\ud328\ub529\uc744 \ubcc0\uacbd\ud574 \uc904 \uc218 \uc788\ub2e4.<\/p>\npublic class AriaUtil {\n\n private static final String privateKey_256 = MyConstants.PRIVATE_KEY;\n\n public static String ariaCBCEncode(String plainText) throws Exception {\n byte[] rawKeyBytes = privateKey_256.getBytes(StandardCharsets.UTF_8);\n byte[] keyBytes = new byte[16];\n System.arraycopy(rawKeyBytes, 0, keyBytes, 0, Math.min(rawKeyBytes.length, keyBytes.length));\n\n SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "ARIA");\n IvParameterSpec IV = new IvParameterSpec(keyBytes);\n\n Cipher c = Cipher.getInstance("ARIA\/CBC\/PKCS7Padding");\n c.init(Cipher.ENCRYPT_MODE, secretKey, IV);\n byte[] encryptionByte = c.doFinal(plainText.getBytes(StandardCharsets.UTF_8));\n\n return Base64.getEncoder().encodeToString(encryptionByte);\n }\n\n public static String ariaCBCDecode(String encodeText) throws Exception {\n byte[] rawKeyBytes = privateKey_256.getBytes(StandardCharsets.UTF_8);\n byte[] keyBytes = new byte[16];\n System.arraycopy(rawKeyBytes, 0, keyBytes, 0, Math.min(rawKeyBytes.length, keyBytes.length));\n\n SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "ARIA");\n IvParameterSpec IV = new IvParameterSpec(keyBytes);\n\n byte[] decryptionByte = Base64.getDecoder().decode(encodeText);\n Cipher c = Cipher.getInstance("ARIA\/CBC\/PKCS7Padding");\n c.init(Cipher.DECRYPT_MODE, secretKey, IV);\n\n return new String(c.doFinal(decryptionByte), StandardCharsets.UTF_8);\n }\n\n}<\/code><\/pre>\npublic class SeedUtil {\n\n private static final String privateKey_256 = MyConstants.PRIVATE_KEY;\n\n public static String seedCBCEncode(String plainText) throws Exception {\n byte[] rawKeyBytes = privateKey_256.getBytes(StandardCharsets.UTF_8);\n byte[] keyBytes = new byte[16];\n System.arraycopy(rawKeyBytes, 0, keyBytes, 0, Math.min(rawKeyBytes.length, keyBytes.length));\n\n SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "SEED");\n IvParameterSpec IV = new IvParameterSpec(keyBytes);\n\n Cipher c = Cipher.getInstance("SEED\/CBC\/PKCS7Padding");\n c.init(Cipher.ENCRYPT_MODE, secretKey, IV);\n byte[] encryptionByte = c.doFinal(plainText.getBytes(StandardCharsets.UTF_8));\n\n return Base64.getEncoder().encodeToString(encryptionByte);\n }\n\n public static String seedCBCDecode(String encodeText) throws Exception {\n byte[] rawKeyBytes = privateKey_256.getBytes(StandardCharsets.UTF_8);\n byte[] keyBytes = new byte[16];\n System.arraycopy(rawKeyBytes, 0, keyBytes, 0, Math.min(rawKeyBytes.length, keyBytes.length));\n\n SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "SEED");\n IvParameterSpec IV = new IvParameterSpec(keyBytes);\n\n byte[] decryptionByte = Base64.getDecoder().decode(encodeText);\n Cipher c = Cipher.getInstance("SEED\/CBC\/PKCS7Padding");\n c.init(Cipher.DECRYPT_MODE, secretKey, IV);\n\n return new String(c.doFinal(decryptionByte), StandardCharsets.UTF_8);\n }\n\n}<\/code><\/pre>\npublic class Main {\n public static void main(String[] args) throws Exception {\n String plainText = "Hello world! \uc548\ub155\ud558\uc138\uc694.";\n\n String encData;\n\n if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {\n Security.addProvider(new BouncyCastleProvider());\n }\n\n encData = AriaUtil.ariaCBCEncode(plainText);\n\n System.out.println("# AriaUtil \ud3c9\ubb38 \ub370\uc774\ud130 : " + plainText);\n System.out.println("# AriaUtil \uc554\ud638\ud654 \ub370\uc774\ud130 : " + encData);\n System.out.println("# AriaUtil \ubcf5\ud638\ud654 \ub370\uc774\ud130 : " + AriaUtil.ariaCBCDecode(encData));\n\n encData = SeedUtil.seedCBCEncode(plainText);\n\n System.out.println("# SeedUtil \ud3c9\ubb38 \ub370\uc774\ud130 : " + plainText);\n System.out.println("# SeedUtil \uc554\ud638\ud654 \ub370\uc774\ud130 : " + encData);\n System.out.println("# SeedUtil \ubcf5\ud638\ud654 \ub370\uc774\ud130 : " + SeedUtil.seedCBCDecode(encData));\n }\n}<\/code><\/pre>\nC# – \ubb38\uc790\uc5f4<\/h3>\nNuGet\\Install-Package BouncyCastle.Cryptography -Version 2.4.0<\/code><\/pre>\npublic class SeedUtil\n{\n \/\/ SEED128(128 bit == 16 byte)\n public static string PRIVATE_KEY = "1234567890123456"; \/\/ 16byte\n\n public static string Encrypt(string plaintxt, string keys)\n {\n if (string.IsNullOrEmpty(plaintxt)) return plaintxt;\n\n var skeyBytes = Encoding.UTF8.GetBytes(keys);\n var iv = new byte[16];\n Array.Copy(skeyBytes, iv, Math.Min(iv.Length, skeyBytes.Length));\n\n IBufferedCipher cipher = CipherUtilities.GetCipher("SEED\/CBC\/PKCS7Padding");\n KeyParameter key = ParameterUtilities.CreateKeyParameter("SEED", skeyBytes);\n cipher.Init(true, new ParametersWithIV(key, iv));\n\n byte[] encrypted = cipher.DoFinal(Encoding.UTF8.GetBytes(plaintxt));\n return Convert.ToBase64String(encrypted);\n }\n\n public static string Decrypt(string encrypted, string keys)\n {\n if (string.IsNullOrEmpty(encrypted)) return encrypted;\n\n var skeyBytes = Encoding.UTF8.GetBytes(keys);\n var iv = new byte[16];\n Array.Copy(skeyBytes, iv, Math.Min(iv.Length, skeyBytes.Length));\n\n IBufferedCipher cipher = CipherUtilities.GetCipher("SEED\/CBC\/PKCS7Padding");\n KeyParameter key = ParameterUtilities.CreateKeyParameter("SEED", skeyBytes);\n cipher.Init(false, new ParametersWithIV(key, iv));\n\n byte[] dec = cipher.DoFinal(Convert.FromBase64String(encrypted));\n return Encoding.UTF8.GetString(dec);\n }\n}<\/code><\/pre>\npublic class AriaUtil\n{\n \/\/ ARIA128(128 bit == 16 byte)\n \/\/ ARIA192(192 bit == 24 byte)\n \/\/ ARIA256(256 bit == 32 byte)\n public static string PRIVATE_KEY = "12345678901234567890123456789012"; \/\/ 32byte\n\n public static string Encrypt(string plaintxt, string keys)\n {\n if (string.IsNullOrEmpty(plaintxt)) return plaintxt;\n\n var skeyBytes = Encoding.UTF8.GetBytes(keys);\n var iv = new byte[16];\n Array.Copy(skeyBytes, iv, Math.Min(iv.Length, skeyBytes.Length));\n\n IBufferedCipher cipher = CipherUtilities.GetCipher("ARIA\/CBC\/PKCS7Padding");\n KeyParameter key = ParameterUtilities.CreateKeyParameter("ARIA", skeyBytes);\n cipher.Init(true, new ParametersWithIV(key, iv));\n\n byte[] encrypted = cipher.DoFinal(Encoding.UTF8.GetBytes(plaintxt));\n return Convert.ToBase64String(encrypted);\n }\n\n public static string Decrypt(string encrypted, string keys)\n {\n if (string.IsNullOrEmpty(encrypted)) return encrypted;\n\n var skeyBytes = Encoding.UTF8.GetBytes(keys);\n var iv = new byte[16];\n Array.Copy(skeyBytes, iv, Math.Min(iv.Length, skeyBytes.Length));\n\n IBufferedCipher cipher = CipherUtilities.GetCipher("ARIA\/CBC\/PKCS7Padding");\n KeyParameter key = ParameterUtilities.CreateKeyParameter("ARIA", skeyBytes);\n cipher.Init(false, new ParametersWithIV(key, iv));\n\n byte[] dec = cipher.DoFinal(Convert.FromBase64String(encrypted));\n return Encoding.UTF8.GetString(dec);\n }\n}<\/code><\/pre>\nstring encText = AriaUtil.Encrypt(plainText, AriaUtil.PRIVATE_KEY);\nstring decText = AriaUtil.Decrypt(encText, AriaUtil.PRIVATE_KEY);\n\nConsole.WriteLine("AriaUtil \ud3c9\ubb38 : " + plainText);\nConsole.WriteLine("AriaUtil \uc554\ud638\ud654 : " + encText);\nConsole.WriteLine("AriaUtil \ubcf5\ud638\ud654 : " + decText);\n\nencText = SeedUtil.Encrypt(plainText, SeedUtil.PRIVATE_KEY);\ndecText = SeedUtil.Decrypt(encText, SeedUtil.PRIVATE_KEY);\n\nConsole.WriteLine("SeedUtil \ud3c9\ubb38 : " + plainText);\nConsole.WriteLine("SeedUtil \uc554\ud638\ud654 : " + encText);\nConsole.WriteLine("SeedUtil \ubcf5\ud638\ud654 : " + decText);<\/code><\/pre>\nC# – \ud30c\uc77c<\/h3>\n
\ud30c\uc77c\uc778 \uacbd\uc6b0 \uc0ac\uc774\uc988\uac00 \ud06c\ubbc0\ub85c \uc870\uae08 \ub2e4\ub974\uac8c \uc791\uc131\ud574\uc57c \ud55c\ub2e4.<\/p>\n
public class AriaUtil\n{\n \/\/ ARIA128(128 bit == 16 byte)\n \/\/ ARIA192(192 bit == 24 byte)\n \/\/ ARIA256(256 bit == 32 byte)\n public static string PRIVATE_KEY = "12345678901234567890123456789012"; \/\/ 32byte\n\n public static IBufferedCipher GetCipher(bool isEncMode, string keys)\n {\n var skeyBytes = Encoding.UTF8.GetBytes(keys);\n var iv = new byte[16];\n Array.Copy(skeyBytes, iv, Math.Min(iv.Length, skeyBytes.Length));\n\n IBufferedCipher cipher = CipherUtilities.GetCipher("ARIA\/CBC\/PKCS7Padding");\n KeyParameter key = ParameterUtilities.CreateKeyParameter("ARIA", skeyBytes);\n cipher.Init(isEncMode, new ParametersWithIV(key, iv));\n\n return cipher;\n }\n}<\/code><\/pre>\nstring filename_src = "plain.txt";\nstring filename_enc = "enc.txt";\nstring filename_dec = "dec.txt";\n\nIBufferedCipher cipherEnc = AriaUtil.GetCipher(true, AriaUtil.PRIVATE_KEY);\nIBufferedCipher cipherDec = AriaUtil.GetCipher(false, AriaUtil.PRIVATE_KEY);<\/code><\/pre>\nFileStream file_enc = new FileStream(filename_enc, FileMode.Create);\nusing (FileStream fs = new FileStream(filename_src, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize: BUFFERSIZE * 4, useAsync: true))\n{\n long fileSize = fs.Length;\n long fileRead = 0;\n int blockSize = cipherEnc.GetBlockSize();\n byte[] buffer = new byte[blockSize * 128]; \/\/ 16 * 128 = 2048\n\n do\n {\n int bytesRead = fs.Read(buffer, 0, buffer.Length);\n if (bytesRead == 0) { break; }\n\n fileRead = fileRead + bytesRead;\n\n byte[] outputBytes = new byte[cipherEnc.GetOutputSize(bytesRead)];\n if (outputBytes.Length <= buffer.Length || fileSize == fileRead)\n {\n \/\/ last read\n int processSize = cipherEnc.ProcessBytes(buffer, 0, bytesRead, outputBytes, 0);\n file_enc.Write(outputBytes, 0, processSize);\n int finalSize = cipherEnc.DoFinal(outputBytes, processSize);\n file_enc.Write(outputBytes, processSize, finalSize);\n break;\n }\n else\n {\n int processSize = cipherEnc.ProcessBytes(buffer, 0, bytesRead, outputBytes, 0);\n file_enc.Write(outputBytes, 0, processSize);\n }\n } while (true);\n}\nfile_enc.Flush();\nfile_enc.Close();<\/code><\/pre>\nFileStream file_dec = new FileStream(filename_dec, FileMode.Create);\nusing (FileStream fs = new FileStream(filename_enc, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize: BUFFERSIZE * 4, useAsync: true))\n{\n long fileSize = fs.Length;\n long fileRead = 0;\n int blockSize = cipherDec.GetBlockSize();\n byte[] buffer = new byte[blockSize * 128]; \/\/ 16 * 128 = 2048\n\n do\n {\n int bytesRead = fs.Read(buffer, 0, buffer.Length);\n if (bytesRead == 0) { break; }\n\n fileRead = fileRead + bytesRead;\n\n byte[] outputBytes = new byte[cipherDec.GetOutputSize(bytesRead)];\n if (outputBytes.Length < buffer.Length || fileSize == fileRead)\n {\n \/\/ last read\n int processSize = cipherDec.ProcessBytes(buffer, 0, bytesRead, outputBytes, 0);\n file_dec.Write(outputBytes, 0, processSize);\n int finalSize = cipherDec.DoFinal(outputBytes, processSize);\n file_dec.Write(outputBytes, processSize, finalSize);\n break;\n }\n else\n {\n int processSize = cipherDec.ProcessBytes(buffer, 0, bytesRead, outputBytes, 0);\n file_dec.Write(outputBytes, 0, processSize);\n }\n } while (true);\n}\nfile_dec.Flush();\nfile_dec.Close();<\/code><\/pre>\nAES<\/h2>\n
\uc804 \uc138\uacc4\uc801\uc73c\ub85c \ub9ce\uc774 \uc4f0\uc774\uba70,
\nJAVA \/ C# \ub4f1 \uae30\ubcf8 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \ud3ec\ud568\ub418\uc5b4 \uc788\ub294 \uacbd\uc6b0\uac00 \ub9ce\ub2e4.<\/p>\n
JAVA – \ubb38\uc790\uc5f4<\/h3>\n
\uad6c \ubc84\uc804\uc758 JDK \uc5d0\uc11c\ub294 AES256 \uc0ac\uc6a9\uc744 \uc704\ud574 \ubcc4\ub3c4 \uc124\uc815\uc774 \ud544\uc694\ud558\ub2e4.<\/p>\n
public class MyConstants {\n\n \/\/ AES128(128 bit == 16 byte)\n \/\/ AES192(192 bit == 24 byte)\n \/\/ AES256(256 bit == 32 byte)\n public static final String PRIVATE_KEY = "12345678901234567890123456789012"; \/\/ 32byte\n}<\/code><\/pre>\nAES \uc554\ud638\ud654\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83 \uc774\uc678\uc5d0 \uc6b4\uc601\ubaa8\ub4dc(CBC) \ubc0f \ud328\ub529(PKCS5Padding) \uc744 \uc9c0\uc815\ud574 \uc8fc\uc5b4\uc57c \ud55c\ub2e4.<\/p>\n
CBC \uac00 \ubcf4\uc548\uc774 \uac00\uc7a5 \uac15\ud558\ub2e4\uace0 \uc54c\ub824\uc838 \uc788\ub2e4.
\nJDK \uc5d0\uc11c\ub294 PKCS5Padding \ub77c\uace0 \uba85\uce6d\uc774 \ub418\uc5b4 \uc788\uc9c0\ub9cc \uc2e4\uc81c\ub85c\ub294 PKCS7Padding \ub85c \uc791\ub3d9\ud55c\ub2e4.<\/p>\n
Base64 \ub85c \uc778\ucf54\ub529\/\ub514\ucf54\ub529\ud558\ub294 \uac83\uc740 AES \uc758 \ubc94\uc704\uc5d0\uc11c \ubc97\uc5b4\ub09c\ub2e4.<\/p>\n
\uc989, AES \uc554\ud638\ud654\ub97c \uc0ac\uc6a9\ud55c\ub2e4\ub294 \uac83\uacfc KEY \ub97c \uc544\ub294 \uac83\uc73c\ub85c \ubd80\uc871\ud558\uace0,
\n\uc5b4\ub5a4 \ubc29\uc2dd\uc73c\ub85c \uc554\ud638\ud654\ub418\uc5b4 \uc788\ub294\uc9c0\ub97c \uc54c\uc544\uc57c \ubcf5\ud638\ud654\ub97c \uc9c4\ud589\ud560 \uc218 \uc788\ub2e4.<\/p>\n
public class AesUtil {\n\n private static final String privateKey_256 = MyConstants.PRIVATE_KEY;\n\n public static String aesCBCEncode(String plainText) throws Exception {\n byte[] rawKeyBytes = privateKey_256.getBytes(StandardCharsets.UTF_8);\n byte[] keyBytes = new byte[16];\n System.arraycopy(rawKeyBytes, 0, keyBytes, 0, Math.min(rawKeyBytes.length, keyBytes.length));\n\n SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");\n IvParameterSpec IV = new IvParameterSpec(keyBytes);\n\n \/\/ PKCS5\uac00 PKCS7\ub85c \uc218\ud589\ub418\uc9c0\ub9cc, PKCS5\ub780 \uc774\ub984\uc73c\ub85c JCA(Java Cryptography Architecture)\uc5d0 \uc815\uc758\ub418\uc5b4 \uc788\ub2e4\n Cipher c = Cipher.getInstance("AES\/CBC\/PKCS5Padding");\n\n c.init(Cipher.ENCRYPT_MODE, secretKey, IV);\n\n byte[] encryptionByte = c.doFinal(plainText.getBytes("UTF-8"));\n\n return Base64.getEncoder().encodeToString(encryptionByte);\n }\n\n public static String aesCBCDecode(String encodeText) throws Exception {\n byte[] rawKeyBytes = privateKey_256.getBytes(StandardCharsets.UTF_8);\n byte[] keyBytes = new byte[16];\n System.arraycopy(rawKeyBytes, 0, keyBytes, 0, Math.min(rawKeyBytes.length, keyBytes.length));\n\n SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");\n IvParameterSpec IV = new IvParameterSpec(keyBytes);\n\n byte[] decryptionByte = Base64.getDecoder().decode(encodeText);\n\n \/\/ PKCS5\uac00 PKCS7\ub85c \uc218\ud589\ub418\uc9c0\ub9cc, PKCS5\ub780 \uc774\ub984\uc73c\ub85c JCA(Java Cryptography Architecture)\uc5d0 \uc815\uc758\ub418\uc5b4 \uc788\ub2e4\n Cipher c = Cipher.getInstance("AES\/CBC\/PKCS5Padding");\n\n c.init(Cipher.DECRYPT_MODE, secretKey, IV);\n\n return new String(c.doFinal(decryptionByte), "UTF-8");\n }\n\n}<\/code><\/pre>\npublic class Main {\n public static void main(String[] args) throws Exception {\n String plainText = "Hello world! \uc548\ub155\ud558\uc138\uc694.";\n\n String encData = AesUtil.aesCBCEncode(plainText);\n\n System.out.println("# \ud3c9\ubb38 \ub370\uc774\ud130 : " + plainText);\n System.out.println("# \uc554\ud638\ud654 \ub370\uc774\ud130 : " + encData);\n System.out.println("# \ubcf5\ud638\ud654 \ub370\uc774\ud130 : " + AesUtil.aesCBCDecode(encData));\n }\n}<\/code><\/pre>\nJAVA – \ud30c\uc77c<\/h3>\n
Bouncy Castle \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c AES \uc554\ud638\ud654\ub3c4 \uc9c0\uc6d0\ud558\ubbc0\ub85c,
\nBouncy Castle \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc774\uc6a9\ud574 \uc791\uc131\ud569\ub2c8\ub2e4.<\/p>\n
public class AesUtil {\n\n public static final String PRIVATE_KEY = "12345678901234567890123456789012"; \/\/ 32byte\n\n public static Cipher GetCipher(int isEncMode) throws Exception\n {\n byte[] skeyBytes = privateKey_128.getBytes(StandardCharsets.UTF_8);\n byte[] iv = new byte[16];\n System.arraycopy(skeyBytes, 0, iv, 0, Math.min(skeyBytes.length, iv.length));\n\n Cipher cipher = Cipher.getInstance("AES\/CBC\/PKCS7Padding", "BC");\n SecretKeySpec secretKey = new SecretKeySpec(skeyBytes, "AES");\n IvParameterSpec IV = new IvParameterSpec(iv);\n cipher.init(isEncMode, secretKey, IV);\n\n return cipher;\n }\n\n public static boolean encrypt(Cipher cipherEnc, String plainFileName, String encFileName) {\n return doEncryptDecrypt(cipherEnc, plainFileName, encFileName);\n }\n\n public static boolean decrypt(Cipher cipherDec, String encFileName, String plainFileName) {\n return doEncryptDecrypt(cipherDec, encFileName, plainFileName);\n }\n\n public static boolean doEncryptDecrypt(Cipher cipher, String srcFileName, String destFileName) {\n byte[] buffer = new byte[2048];\n try {\n FileInputStream srcFile = new FileInputStream(srcFileName);\n FileOutputStream destFile = new FileOutputStream(destFileName);\n int bytesRead;\n byte[] outputBytes;\n while ((bytesRead = srcFile.read(buffer)) != -1) {\n outputBytes = cipher.update(buffer, 0, bytesRead);\n if (outputBytes != null) {\n destFile.write(outputBytes);\n }\n }\n outputBytes = cipher.doFinal();\n if (outputBytes != null) {\n destFile.write(outputBytes);\n }\n destFile.flush();\n destFile.close();\n srcFile.close();\n } catch (SecurityException | IOException | IllegalBlockSizeException | BadPaddingException e) {\n return false;\n }\n\n return true;\n }\n\n}<\/code><\/pre>\nSecurity.addProvider(new BouncyCastleProvider());\n\nCipher cipherEnc = AesUtil.GetCipher(Cipher.ENCRYPT_MODE);\nAesUtil.encrypt(cipherEnc, "D:\\\\work\\\\plain.gz", "D:\\\\work\\\\enc.gz");\n\nCipher cipherDec = AesUtil.GetCipher(Cipher.DECRYPT_MODE);\nAesUtil.decrypt(cipherDec, "D:\\\\work\\\\enc.gz", "D:\\\\work\\\\dec.gz");<\/code><\/pre>\nC#<\/h3>\npublic class AesUtil\n{\n public AesUtil()\n {\n }\n\n \/\/ AES128(128 bit == 16 byte)\n \/\/ AES192(192 bit == 24 byte)\n \/\/ AES256(256 bit == 32 byte)\n public static string PRIVATE_KEY = "12345678901234567890123456789012"; \/\/ 32byte\n\n public static string Encrypt(string plaintxt, string keys)\n {\n if (string.IsNullOrEmpty(plaintxt)) return plaintxt;\n\n var b = Encoding.UTF8.GetBytes(plaintxt);\n var encrypted = getAes(keys).CreateEncryptor().TransformFinalBlock(b, 0, b.Length);\n return Convert.ToBase64String(encrypted);\n }\n\n public static string Decrypt(string encrypted, string keys)\n {\n if (string.IsNullOrEmpty(encrypted)) return encrypted;\n\n var b = Convert.FromBase64String(encrypted);\n var decrypted = getAes(keys).CreateDecryptor().TransformFinalBlock(b, 0, b.Length);\n return Encoding.UTF8.GetString(decrypted);\n }\n\n public static Aes getAes(string keys)\n {\n var keyBytes = new byte[16];\n var skeyBytes = Encoding.UTF8.GetBytes(keys);\n Array.Copy(skeyBytes, keyBytes, Math.Min(keyBytes.Length, skeyBytes.Length));\n\n Aes aes = Aes.Create();\n aes.Mode = CipherMode.CBC;\n aes.Padding = PaddingMode.PKCS7;\n aes.KeySize = 256;\n aes.Key = keyBytes;\n aes.IV = keyBytes;\n\n return aes;\n }\n}<\/code><\/pre>\nstring plainText = "Hello, World! \uc548\ub155\ud558\uc138\uc694.";\n\nAesUtil aes = new AesUtil();\n\nstring encText = AesUtil.Encrypt(plainText, AesUtil.PRIVATE_KEY);\nstring decText = AesUtil.Decrypt(encText, AesUtil.PRIVATE_KEY);\n\nConsole.WriteLine("\ud3c9\ubb38 : " + plainText);\nConsole.WriteLine("\uc554\ud638\ud654 : " + encText);\nConsole.WriteLine("\ubcf5\ud638\ud654 : " + decText);<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\uc554\ud638\ud654 – SEED \/ ARIA \/ AES \uba87\uac00\uc9c0 \uc554\ud638\ud654 \uae30\ubc95\uc744 \uc815\ub9ac\ud574 \ubcf4\ub824\ud569\ub2c8\ub2e4. SEED\/ARIA \ub294 \uad6d\uc0b0 \uc554\ud638\ud654 \uc54c\uace0\ub9ac\uc998\uc774\uace0, AES \ub294 \ubbf8\uad6d\uc5d0\uc11c \uac1c\ubc1c\ub41c \uc554\ud638\ud654 \uc54c\uace0\ub9ac\uc998\uc774\ub2e4. \uae30\ucd08\uc9c0\uc2dd : \ube14\ub85d \uc554\ud638\ud654\uc5d0\uc11c\uc758 \uc6b4\uc601 \ubaa8\ub4dc \ubc0f \ud328\ub529 \uc554\ud638\ud654 \uae30\ubc95\uc740 \ub370\uc774\ud0c0\ub97c \uc77c\uc815 \ud06c\uae30(8byte \ub610\ub294 16byte) \ub85c \ucabc\uac20 \ud6c4, \uac01\uac01\uc758 \uc870\uac01\uc744 \uc554\ud638\ud654\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c\ub9cc \uc801\uc6a9\ub41c\ub2e4. \ub530\ub77c\uc11c, \ud55c \uc870\uac01(8byte \ub610\ub294 16byte)\uc758 \ubcf5\ud638\ud654\ub9cc \uc131\uacf5\ud558\uac8c \ub418\uba74,\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-9440","post","type-post","status-publish","format-standard","hentry","category-devops"],"_links":{"self":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9440"}],"version-history":[{"count":20,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9440\/revisions"}],"predecessor-version":[{"id":9485,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9440\/revisions\/9485"}],"wp:attachment":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}