fabric.common

Class Crypto

java.lang.Object

fabric.common.Crypto

public final class Crypto
extends java.lang.Object

This is the clearing house for all things crypto.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ALG_HASH
static java.lang.String	ALG_PUBLIC_KEY_GEN
static java.lang.String	ALG_SECRET_CRYPTO
static java.lang.String	ALG_SECRET_KEY_GEN
static java.lang.String	ALG_SIGNATURE
static int	SIZE_PUBLIC_KEY
static int	SIZE_SECRET_KEY

Constructor Summary

Constructors

Constructor and Description
Crypto()

Method Summary

Modifier and Type	Method and Description
static javax.crypto.Cipher	cipherInstance(int opmode, byte[] key, byte[] iv) Creates an initializes a new Cipher instance with the given parameters.
static java.security.cert.X509Certificate	createCertificate(java.lang.String subjectName, java.security.PublicKey subjectKey, java.lang.String issuerName, java.security.PrivateKey issuerKey) Generates a certificate, signed by the issuer, binding the subject's name to their public key.
static java.security.MessageDigest	digestInstance()
static void	fillIV(byte[] iv) Fills an initialization vector with random bytes.
static java.security.KeyPair	genKeyPair()
static javax.crypto.SecretKey	genSecretKey()
static java.lang.String	getCN(java.lang.String dn) Extracts the CN component of a Distinguished Name.
static byte[]	makeIV() Creates a new initialization vector.
static java.security.KeyPairGenerator	publicKeyGenInstance()
static javax.crypto.KeyGenerator	secretKeyGenInstance()
static java.security.Signature	signatureInstance()
static void	validateCertificateChain(java.security.cert.Certificate[] certificateChain, java.util.Set<java.security.cert.TrustAnchor> trustStore) Validates the given certificate chain against the given trust store.

Methods inherited from class java.lang.Object

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

Field Detail

ALG_SIGNATURE

public static final java.lang.String ALG_SIGNATURE

See Also:

Constant Field Values

ALG_SECRET_KEY_GEN

public static final java.lang.String ALG_SECRET_KEY_GEN

See Also:

Constant Field Values

SIZE_SECRET_KEY

public static final int SIZE_SECRET_KEY

See Also:

Constant Field Values

ALG_SECRET_CRYPTO

public static final java.lang.String ALG_SECRET_CRYPTO

See Also:

Constant Field Values

ALG_PUBLIC_KEY_GEN

public static final java.lang.String ALG_PUBLIC_KEY_GEN

See Also:

Constant Field Values

SIZE_PUBLIC_KEY

public static final int SIZE_PUBLIC_KEY

See Also:

Constant Field Values

ALG_HASH

public static final java.lang.String ALG_HASH

See Also:

Constant Field Values

Constructor Detail

Crypto

public Crypto()

Method Detail

digestInstance

public static java.security.MessageDigest digestInstance()

signatureInstance

public static java.security.Signature signatureInstance()

secretKeyGenInstance

public static javax.crypto.KeyGenerator secretKeyGenInstance()

genSecretKey

public static javax.crypto.SecretKey genSecretKey()

publicKeyGenInstance

public static java.security.KeyPairGenerator publicKeyGenInstance()

genKeyPair

public static java.security.KeyPair genKeyPair()

fillIV

public static void fillIV(byte[] iv)

Fills an initialization vector with random bytes.

makeIV

public static byte[] makeIV()

Creates a new initialization vector.

cipherInstance

public static javax.crypto.Cipher cipherInstance(int opmode,
                                                 byte[] key,
                                                 byte[] iv)
                                          throws java.security.NoSuchAlgorithmException,
                                                 javax.crypto.NoSuchPaddingException,
                                                 java.security.InvalidKeyException,
                                                 java.security.InvalidAlgorithmParameterException

Creates an initializes a new Cipher instance with the given parameters.

Parameters:

opmode - The mode of operation. One of the mode constants in Cipher.

key - The secret key to use.

iv - The initialization vector to use. For encryption, this should be randomly generated; for decryption, this should match the one used during encryption.

Throws:

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

validateCertificateChain

public static void validateCertificateChain(java.security.cert.Certificate[] certificateChain,
                                            java.util.Set<java.security.cert.TrustAnchor> trustStore)
                                     throws java.security.GeneralSecurityException

Validates the given certificate chain against the given trust store.

Throws:

java.security.GeneralSecurityException

createCertificate

public static java.security.cert.X509Certificate createCertificate(java.lang.String subjectName,
                                                                   java.security.PublicKey subjectKey,
                                                                   java.lang.String issuerName,
                                                                   java.security.PrivateKey issuerKey)
                                                            throws java.security.GeneralSecurityException

Generates a certificate, signed by the issuer, binding the subject's name to their public key.

Throws:

java.security.GeneralSecurityException

getCN

public static java.lang.String getCN(java.lang.String dn)

Extracts the CN component of a Distinguished Name.