de.alpharogroup.crypto.key.reader

Class PublicKeyReader

java.lang.Object

de.alpharogroup.crypto.key.reader.PublicKeyReader

public class PublicKeyReader
extends Object

The class PublicKeyReader is a utility class for reading public keys.

Field Summary

Fields

Modifier and Type	Field and Description
static String	BEGIN_PUBLIC_KEY_PREFIX The Constant BEGIN_PUBLIC_KEY_PREFIX.
static String	END_PUBLIC_KEY_SUFFIX The Constant END_PUBLIC_KEY_SUFFIX.

Constructor Summary

Constructors

Constructor and Description
PublicKeyReader()

Method Summary

Modifier and Type	Method and Description
static String	readPemFileAsBase64(File file) Read the public key from a pem file as base64 encoded String value.
static PublicKey	readPemPublicKey(File file) reads a public key from a file.
static PublicKey	readPemPublicKey(File file, SecurityProvider securityProvider) reads a public key from a file.
static PublicKey	readPublicKey(byte[] publicKeyBytes, SecurityProvider securityProvider) Read public key.
static PublicKey	readPublicKey(byte[] publicKeyBytes, String provider) Read public key.
static PublicKey	readPublicKey(byte[] publicKeyBytes, String provider, String algorithm) Read public key.
static PublicKey	readPublicKey(File file) Read public key.

Methods inherited from class java.lang.Object

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

Field Detail

END_PUBLIC_KEY_SUFFIX

public static final String END_PUBLIC_KEY_SUFFIX

The Constant END_PUBLIC_KEY_SUFFIX.

See Also:

Constant Field Values

BEGIN_PUBLIC_KEY_PREFIX

public static final String BEGIN_PUBLIC_KEY_PREFIX

The Constant BEGIN_PUBLIC_KEY_PREFIX.

See Also:

Constant Field Values

Constructor Detail

PublicKeyReader

public PublicKeyReader()

Method Detail

readPublicKey

public static PublicKey readPublicKey(File file)
                               throws IOException,
                                      NoSuchAlgorithmException,
                                      InvalidKeySpecException,
                                      NoSuchProviderException

Read public key.

Parameters:

file - the file

Returns:

the public key

Throws:

IOException - Signals that an I/O exception has occurred.

NoSuchAlgorithmException - is thrown if instantiation of the cypher object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchProviderException - is thrown if the specified provider is not registered in the security provider list.

readPublicKey

public static PublicKey readPublicKey(byte[] publicKeyBytes,
                                      SecurityProvider securityProvider)
                               throws NoSuchAlgorithmException,
                                      InvalidKeySpecException,
                                      NoSuchProviderException

Read public key.

Parameters:

publicKeyBytes - the public key bytes

securityProvider - the security provider

Returns:

the public key

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the cypher object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchProviderException - is thrown if the specified provider is not registered in the security provider list.

readPublicKey

public static PublicKey readPublicKey(byte[] publicKeyBytes,
                                      String provider)
                               throws NoSuchAlgorithmException,
                                      InvalidKeySpecException,
                                      NoSuchProviderException

Read public key.

Parameters:

publicKeyBytes - the public key bytes

provider - the provider

Returns:

the public key

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the cypher object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchProviderException - is thrown if the specified provider is not registered in the security provider list.

readPublicKey

public static PublicKey readPublicKey(byte[] publicKeyBytes,
                                      String provider,
                                      String algorithm)
                               throws NoSuchAlgorithmException,
                                      InvalidKeySpecException,
                                      NoSuchProviderException

Read public key.

Parameters:

publicKeyBytes - the public key bytes

provider - the provider

algorithm - the algorithm for the KeyFactory

Returns:

the public key

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the cypher object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchProviderException - is thrown if the specified provider is not registered in the security provider list.

readPemPublicKey

public static PublicKey readPemPublicKey(File file,
                                         SecurityProvider securityProvider)
                                  throws Exception

reads a public key from a file.

Parameters:

file - the file

securityProvider - the security provider

Returns:

the public key

Throws:

Exception - is thrown if if a security error occur

readPemFileAsBase64

public static String readPemFileAsBase64(File file)
                                  throws IOException

Read the public key from a pem file as base64 encoded String value.

Parameters:

file - the file in pem format that contains the public key.

Returns:

the base64 encoded String value.

Throws:

IOException - Signals that an I/O exception has occurred.

readPemPublicKey

public static PublicKey readPemPublicKey(File file)
                                  throws Exception

reads a public key from a file.

Parameters:

file - the file

Returns:

the public key

Throws:

Exception - is thrown if if a security error occur