CryptoApi

Defines cryptographic methods.

Constructors

CryptoApi

Create instance of CryptoApi.

public void CryptoApi()

Methods

close

public void close()

convertPEMKeyToWIFKey

Converts given private key in PEM format to its WIF format.

public String convertPEMKeyToWIFKey(
	String pemKey
)

Name	Type	Description
pemKey	String	private key to convert

Type	Description
String	Private key in WIF format

decryptDataSymmetric

Decrypts buffer with a given key using AES.

public byte[] decryptDataSymmetric(
	byte[] data,
	byte[] symmetricKey
)

Name	Type	Description
data	byte[]	buffer to decrypt
symmetricKey	byte[]	key used to decrypt data

Type	Description
byte[]	Plain (decrypted) data buffer

derivePrivateKey

Generates a new private ECC key from a password using pbkdf2.

public String derivePrivateKey(
	String password,
	String salt
)

Name	Type	Description
password	String	the password used to generate the new key
salt	String	random string (additional input for the hashing function)

Type	Description
String	Generated ECC key in WIF format

derivePrivateKey2

Generates a new private ECC key from a password using pbkdf2. This version of the derive function has a rounds count increased to 200k. This makes using this function a safer choice, but it makes the received key different than in the original version.

public String derivePrivateKey2(
	String password,
	String salt
)

Name	Type	Description
password	String	the password used to generate the new key
salt	String	random string (additional input for the hashing function)

Type	Description
String	generated ECC key in WIF format

derivePublicKey

Generates a new public ECC key as a pair for an existing private key.

public String derivePublicKey(
	String privateKey
)

Name	Type	Description
privateKey	String	private ECC key in WIF format

Type	Description
String	Generated ECC key in BASE58DER format

encryptDataSymmetric

Encrypts buffer with a given key using AES.

public byte[] encryptDataSymmetric(
	byte[] data,
	byte[] symmetricKey
)

Name	Type	Description
data	byte[]	buffer to encrypt
symmetricKey	byte[]	key used to encrypt data

Type	Description
byte[]	Encrypted data buffer

generateKeySymmetric

Generates a new symmetric key.

public byte[] generateKeySymmetric()

Type	Description
byte[]	Generated key

generatePrivateKey

Generates a new private ECC key.

public String generatePrivateKey(
	String randomSeed
)

Name	Type	Description
randomSeed	String	optional string used as the base to generate the new key

Type	Description
String	Generated ECC key in WIF format

signData

Creates a signature of data using given key.

public byte[] signData(
	byte[] data,
	String privateKey
)

Name	Type	Description
data	byte[]	data the buffer to sign
privateKey	String	the key used to sign data

Type	Description
byte[]	Signature of data

verifySignature

Validate a signature of data using given key.

public boolean verifySignature(
	byte[] data,
	byte[] signature,
	String publicKey
)

Name	Type	Description
data	byte[]	buffer
signature	byte[]	of data
publicKey	String	public ECC key in BASE58DER format used to validate data

Type	Description
boolean	data validation result