com.virgilsecurity.sdk.crypto

Class VirgilCrypto

java.lang.Object

com.virgilsecurity.sdk.crypto.VirgilCrypto

All Implemented Interfaces:

Crypto

public class VirgilCrypto
extends Object
implements Crypto

The Virgil's implementation of Crypto.

Author:

Andrii Iakovenko

See Also:

Crypto, PublicKey, PrivateKey

Constructor Summary

Constructors

Constructor and Description
VirgilCrypto()

Method Summary

Modifier and Type	Method and Description
Fingerprint	calculateFingerprint(byte[] content) Calculate fingerprint.
byte[]	computeHash(byte[] data, HashAlgorithm algorithm) Compute data hash with algorithm specified.
static VirgilHash	createVirgilHash(HashAlgorithm algorithm)
byte[]	decrypt(byte[] cipherData, PrivateKey privateKey) Decrypt byte array with private key.
void	decrypt(InputStream inputStream, OutputStream outputStream, PrivateKey privateKey) Decrypt stream data with private key.
byte[]	decryptThenVerify(byte[] cipherData, PrivateKey privateKey, PublicKey publicKey) Decrypt data and verify.
byte[]	encrypt(byte[] data, PublicKey recipient) Encrypt byte array for single recipient.
byte[]	encrypt(byte[] data, PublicKey[] recipients) Encrypt byte array with public key set.
void	encrypt(InputStream inputStream, OutputStream outputStream, PublicKey recipient) Encrypt stream data with public key.
void	encrypt(InputStream inputStream, OutputStream outputStream, PublicKey[] recipients) Encrypt stream data with public key set.
byte[]	exportPrivateKey(PrivateKey privateKey) Export private key as byte array.
byte[]	exportPrivateKey(PrivateKey privateKey, String password) Export private key as byte array.
byte[]	exportPublicKey(PublicKey publicKey) Export public key as byte array.
PublicKey	extractPublicKey(PrivateKey privateKey) Extract public key from private key.
KeyPair	generateKeys() Generate key pair.
KeyPair	generateKeys(KeysType keysType) Generate key pair by type.
PrivateKey	importPrivateKey(byte[] privateKey) Import private key from byte array.
PrivateKey	importPrivateKey(byte[] keyData, String password) Import private key from byte array.
PublicKey	importPublicKey(byte[] publicKey) Import public key from byte array.
byte[]	sign(byte[] data, PrivateKey privateKey) Sign byte array data with private key.
byte[]	sign(InputStream inputStream, PrivateKey privateKey) Sign stream data with private key.
byte[]	signThenEncrypt(byte[] data, PrivateKey privateKey, PublicKey recipient) Sign data and encrypt.
byte[]	signThenEncrypt(byte[] data, PrivateKey privateKey, PublicKey[] recipients) Sign data and encrypt.
static VirgilKeyPair.Type	toVirgilKeyPairType(KeysType keysType)
boolean	verify(byte[] data, byte[] signature, PublicKey signer) Verify byte array with signature.
boolean	verify(InputStream inputStream, byte[] signature, PublicKey signer) Verify stream data with signature.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VirgilCrypto

public VirgilCrypto()

Method Detail

createVirgilHash

public static VirgilHash createVirgilHash(HashAlgorithm algorithm)

toVirgilKeyPairType

public static VirgilKeyPair.Type toVirgilKeyPairType(KeysType keysType)

calculateFingerprint

public Fingerprint calculateFingerprint(byte[] content)

Description copied from interface: Crypto

Calculate fingerprint.

Specified by:

calculateFingerprint in interface Crypto

Parameters:

content - The data to calculate fingerprint for.

Returns:

the fingerprint as String.

computeHash

public byte[] computeHash(byte[] data,
                          HashAlgorithm algorithm)

Description copied from interface: Crypto

Compute data hash with algorithm specified.

Specified by:

computeHash in interface Crypto

Parameters:

data - the data for hashing.

algorithm - the algorithm to be used for hash calculation.

Returns:

the hash code.

decrypt

public byte[] decrypt(byte[] cipherData,
                      PrivateKey privateKey)

Description copied from interface: Crypto

Decrypt byte array with private key.

Specified by:

decrypt in interface Crypto

Parameters:

cipherData - the data to be decrypted.

privateKey - the recipients private key.

Returns:

the decrypted data as byte array.

decrypt

public void decrypt(InputStream inputStream,
                    OutputStream outputStream,
                    PrivateKey privateKey)
             throws DecryptionException

Description copied from interface: Crypto

Decrypt stream data with private key.

Specified by:

decrypt in interface Crypto

Parameters:

inputStream - the input stream to be decrypted.

outputStream - the decrypted data as stream.

privateKey - the recipients private key.

Throws:

DecryptionException

See Also:

PublicKey, PrivateKey

decryptThenVerify

public byte[] decryptThenVerify(byte[] cipherData,
                                PrivateKey privateKey,
                                PublicKey publicKey)

Description copied from interface: Crypto

Decrypt data and verify.

Specified by:

decryptThenVerify in interface Crypto

Parameters:

cipherData - the encrypted data to be decrypted.

privateKey - the private key used for decryption.

publicKey - the public key used for verify.

Returns:

the decrypted data.

encrypt

public byte[] encrypt(byte[] data,
                      PublicKey recipient)

Description copied from interface: Crypto

Encrypt byte array for single recipient.

Specified by:

encrypt in interface Crypto

Parameters:

data - the data to be encrypted.

recipient - the recipient's public key.

Returns:

the encrypted data as byte array.

See Also:

PublicKey

encrypt

public byte[] encrypt(byte[] data,
                      PublicKey[] recipients)

Description copied from interface: Crypto

Encrypt byte array with public key set.

Specified by:

encrypt in interface Crypto

Parameters:

data - the data to be encrypted.

recipients - the recipients public key set.

Returns:

the encrypted data as byte array.

See Also:

PublicKey

encrypt

public void encrypt(InputStream inputStream,
                    OutputStream outputStream,
                    PublicKey recipient)
             throws EncryptionException

Description copied from interface: Crypto

Encrypt stream data with public key.

Specified by:

encrypt in interface Crypto

Parameters:

inputStream - the input stream to be encrypted.

outputStream - the output stream encrypted data written to.

recipient - the recipient's public key.

Throws:

EncryptionException - if encryption failed.

encrypt

public void encrypt(InputStream inputStream,
                    OutputStream outputStream,
                    PublicKey[] recipients)
             throws EncryptionException

Description copied from interface: Crypto

Encrypt stream data with public key set.

Specified by:

encrypt in interface Crypto

Parameters:

inputStream - the input stream to be encrypted.

outputStream - the output stream encrypted data written to.

recipients - the recipients public key set.

Throws:

EncryptionException - if encryption failed.

exportPrivateKey

public byte[] exportPrivateKey(PrivateKey privateKey)

Description copied from interface: Crypto

Export private key as byte array.

Specified by:

exportPrivateKey in interface Crypto

Parameters:

privateKey - the private key.

Returns:

the exported private key as byte array.

See Also:

PrivateKey

exportPrivateKey

public byte[] exportPrivateKey(PrivateKey privateKey,
                               String password)

Description copied from interface: Crypto

Export private key as byte array.

Specified by:

exportPrivateKey in interface Crypto

Parameters:

privateKey - the private key.

password - the private key password.

Returns:

the exported private key as byte array.

See Also:

PrivateKey

exportPublicKey

public byte[] exportPublicKey(PublicKey publicKey)

Description copied from interface: Crypto

Export public key as byte array.

Specified by:

exportPublicKey in interface Crypto

Parameters:

publicKey - the public key.

Returns:

the exported public key as byte array.

See Also:

PublicKey

extractPublicKey

public PublicKey extractPublicKey(PrivateKey privateKey)

Description copied from interface: Crypto

Extract public key from private key.

Specified by:

extractPublicKey in interface Crypto

Parameters:

privateKey - the private key.

Returns:

the extracted public key.

generateKeys

public KeyPair generateKeys()

Description copied from interface: Crypto

Generate key pair.

Specified by:

generateKeys in interface Crypto

Returns:

the generated key pair.

See Also:

PrivateKey, PublicKey

generateKeys

public KeyPair generateKeys(KeysType keysType)

Generate key pair by type.

Parameters:

keysType - the key type.

Returns:

generated key pair.

importPrivateKey

public PrivateKey importPrivateKey(byte[] privateKey)
                            throws CryptoException

Description copied from interface: Crypto

Import private key from byte array.

Specified by:

importPrivateKey in interface Crypto

Parameters:

privateKey - the Base64 encoded private key.

Returns:

the private key.

Throws:

CryptoException - if private key couldn't be imported.

See Also:

PrivateKey

importPrivateKey

public PrivateKey importPrivateKey(byte[] keyData,
                                   String password)
                            throws CryptoException

Description copied from interface: Crypto

Import private key from byte array.

Specified by:

importPrivateKey in interface Crypto

Parameters:

keyData - the Base64 encoded private key.

password - the private key password.

Returns:

the private key.

Throws:

CryptoException - if private key couldn't be imported.

See Also:

PrivateKey

importPublicKey

public PublicKey importPublicKey(byte[] publicKey)

Description copied from interface: Crypto

Import public key from byte array.

Specified by:

importPublicKey in interface Crypto

Parameters:

publicKey - the public key.

Returns:

the public key.

See Also:

PublicKey

sign

public byte[] sign(byte[] data,
                   PrivateKey privateKey)

Description copied from interface: Crypto

Sign byte array data with private key.

Specified by:

sign in interface Crypto

Parameters:

data - the data to be signed.

privateKey - the signer's private key.

Returns:

the signature.

See Also:

PrivateKey

sign

public byte[] sign(InputStream inputStream,
                   PrivateKey privateKey)

Description copied from interface: Crypto

Sign stream data with private key.

Specified by:

sign in interface Crypto

Parameters:

inputStream - the input stream to be signed.

privateKey - the signer's private key.

Returns:

the signature.

See Also:

PrivateKey

signThenEncrypt

public byte[] signThenEncrypt(byte[] data,
                              PrivateKey privateKey,
                              PublicKey recipient)

Description copied from interface: Crypto

Sign data and encrypt.

Specified by:

signThenEncrypt in interface Crypto

Parameters:

data - the data to be signed and encrypted.

privateKey - the private key used for signing.

recipient - the recipient's public key.

Returns:

the signed and encrypted data.

signThenEncrypt

public byte[] signThenEncrypt(byte[] data,
                              PrivateKey privateKey,
                              PublicKey[] recipients)

Description copied from interface: Crypto

Sign data and encrypt.

Specified by:

signThenEncrypt in interface Crypto

Parameters:

data - the data to be signed and encrypted.

privateKey - the private key used for signing.

recipients - the recipient public keys.

Returns:

the signed and encrypted data.

verify

public boolean verify(byte[] data,
                      byte[] signature,
                      PublicKey signer)

Description copied from interface: Crypto

Verify byte array with signature.

Specified by:

verify in interface Crypto

Parameters:

data - the data to be verified.

signature - the signature.

signer - the signer's public key.

Returns:

true if signature is valid. false in other case.

verify

public boolean verify(InputStream inputStream,
                      byte[] signature,
                      PublicKey signer)

Description copied from interface: Crypto

Verify stream data with signature.

Specified by:

verify in interface Crypto

Parameters:

inputStream - the input stream to be verified.

signature - the signature.

signer - the signer's public key.

Returns:

true if signature is valid. false in other case.