Atbash cipher is one of the oldest ciphers known. It is a substitution cipher which works by reversing the alphabet. For instance, "AZ" would become "ZA" and so on.

caesarDecrypt

fun caesarDecrypt(text: String, shift: Int): String

caesarEncrypt

fun caesarEncrypt(text: String, shift: Int): String

Caesar cipher is a more advanced substitution cipher than Atbash cipher. Caesar cipher shifts all the letters in the alphabet by a certain amount, and then substitutes the letters with the ones on positions i + s, where i is the index of the original letter, and s is the shift number. The shift number is found out by computing shift % alphabet.size, where shift is the desired shift by the user and alphabet.size is the number of letters in the alphabet.

catchSubstrateAndXposed

fun catchSubstrateAndXposed()

charSubstituteDecrypt

fun charSubstituteDecrypt(text: String, key: String): String

charSubstituteEncrypt

fun charSubstituteEncrypt(text: String, key: String): String

charSubstituteSecurelyEncrypt

fun charSubstituteSecurelyEncrypt(text: String, keyLength: Int = 2): Pair<String, String>

decryptAESUtils

fun String.decryptAESUtils(key: String): String?

decryptDES

fun String.decryptDES(key: String): String?

detectDebugger

fun detectDebugger(): Boolean

encryptAESUtils

fun String.encryptAESUtils(key: String): String?

encryptDES

fun String.encryptDES(key: String): String?

encryptedSharedPreferences

fun Context.encryptedSharedPreferences(fileName: String = ENCRYPTED_PREFS_DEFAULT_NAME, masterKey: MasterKey = getMasterKeyDefaultAlias): SharedPreferences

encryptFile

fun Context.encryptFile(file: File, masterKey: MasterKey = getMasterKeyDefaultAlias, fileContent: ByteArray)

encryptFileSafely

fun Context.encryptFileSafely(file: File, masterKey: MasterKey = getMasterKeyDefaultAlias, fileContent: ByteArray)

generateOneTimePassword

fun generateOneTimePassword(passwordLength: Int = 8, shuffleCharacters: Boolean = true, random: SecureRandom = SecureRandom(), exemptChars: List<Char> = emptyList()): String

fun generateOneTimePassword(chars: CharArray = ("abcdefghijklmnopqrstuvwxyz" + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "0123456789!@%$%&^?|~'\"#+=" + "\\*/.,:;[]()-_<>").toCharArray(), passwordLength: Int = 8, shuffleCharacters: Boolean = true, random: SecureRandom = SecureRandom(), exemptChars: List<Char> = emptyList()): String

generateRandomKeys

fun generateRandomKeys(primeRange: IntRange): Pair<RSAPublicKey, RSAPrivateKey>

Generates two random keys from prime numbers within the range.

fun generateRandomKeys(primeRange: IntRange, minimumModulus: Int): Pair<RSAPublicKey, RSAPrivateKey>

getEncryptedFile

fun Context.getEncryptedFile(file: File, masterKey: MasterKey = getMasterKeyDefaultAlias): EncryptedFile

getMasterKeyBuilder

fun Context.getMasterKeyBuilder(alias: String = MasterKey.DEFAULT_MASTER_KEY_ALIAS): MasterKey.Builder

getShaSignature

fun Context.getShaSignature(packageName: String): String?

getSingInfoMD5

fun Context.getSingInfoMD5(pkg: String): String?

isDebuggable

fun Context.isDebuggable(): Boolean

isDebuggerAttached

fun isDebuggerAttached(): Boolean

isEmulator

fun isEmulator(): Boolean

isTestKeyBuild

fun isTestKeyBuild(): Boolean

Custom roms have this tag

masterKey

fun Context.masterKey(alias: String = MasterKey.DEFAULT_MASTER_KEY_ALIAS)

fun Context.masterKey(alias: String = MasterKey.DEFAULT_MASTER_KEY_ALIAS, builder: MasterKey.Builder.() -> MasterKey.Builder = { this })

masterKeyCustomSpec

fun Context.masterKeyCustomSpec(alias: String = MasterKey.DEFAULT_MASTER_KEY_ALIAS, keyGenParameterSpec: KeyGenParameterSpec)

masterKeyStrongBox

@RequiresApi(value = 28)

fun Context.masterKeyStrongBox(alias: String = MasterKey.DEFAULT_MASTER_KEY_ALIAS)

md5

fun String.md5(): String

md5Hmac

fun String.md5Hmac(salt: String): String

readBytes

fun EncryptedFile.readBytes(): ByteArray

reader

fun EncryptedFile.reader(): InputStreamReader

readText

fun EncryptedFile.readText(charset: Charset = Charsets.UTF_8): String

rsaDecrypt

fun rsaDecrypt(message: Long, privateKey: RSAPrivateKey): Long

fun rsaDecrypt(message: String, blockSize: Int, privateKey: RSAPrivateKey): String

rsaEncrypt

fun rsaEncrypt(message: Int, publicKey: RSAPublicKey): Long

Encrypt a number. For this to work properly, the modulus has to be bigger than the number. The formula for encryption is c = m^e mod n, where e is the public key exponent and n is the modulus.

fun rsaEncrypt(message: String, publicKey: RSAPublicKey): Pair<String, Int>

sha1

fun String.sha1(): String

sha1Hmac

fun String.sha1Hmac(salt: String): String

sha256

fun String.sha256(): String

sha256Hmac

fun String.sha256Hmac(salt: String): String

sha512

fun String.sha512(): String

vigenereDecrypt

fun vigenereDecrypt(text: String, key: String): String

vigenereEncrypt

fun vigenereEncrypt(text: String, key: String): String

vigenereSecurelyEncrypt

fun vigenereSecurelyEncrypt(text: String, keyLength: Int = 2): Pair<String, String>

Encrypts using randomly generated keys for every N characters of the input string. Outputs a pair where the first element is the encrypted output and the second element is the random key.

zygoteCallCount

fun zygoteCallCount(): Int

If the count is more than 2 then the app is modified