gnu.crypto.key.rsa

Class RSAKeyPairRawCodec

public class RSAKeyPairRawCodec extends Object implements IKeyPairCodec

An object that implements the IKeyPairCodec interface for the Raw format to use with RSA keypairs.

Version: $Revision: 1.2 $

Method Summary
PrivateKeydecodePrivateKey(byte[] k)
PublicKeydecodePublicKey(byte[] k)
byte[]encodePrivateKey(PrivateKey key)

Returns the encoded form of the designated RSA private key according to the Raw format supported by this library.

The Raw format for an RSA private key, in this implementation, is a byte sequence consisting of the following:

  1. 4-byte magic consisting of the value of the literal MAGIC_RAW_RSA_PRIVATE_KEY,
  2. 1-byte version consisting of the constant: 0x01,
  3. 4-byte count of following bytes representing the RSA parameter p (the first prime factor of the modulus) in internet order,
  4. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter p,
  5. 4-byte count of following bytes representing the RSA parameter q (the second prime factor of the modulus) in internet order,
  6. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter q,
  7. 4-byte count of following bytes representing the RSA parameter e (the public exponent) in internet order,
  8. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter e,
  9. 4-byte count of following bytes representing the RSA parameter d (the private exponent) in internet order,
  10. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter d,
byte[]encodePublicKey(PublicKey key)

Returns the encoded form of the designated RSA public key according to the Raw format supported by this library.

The Raw format for an RSA public key, in this implementation, is a byte sequence consisting of the following:

  1. 4-byte magic consisting of the value of the literal MAGIC_RAW_RSA_PUBLIC_KEY,
  2. 1-byte version consisting of the constant: 0x01,
  3. 4-byte count of following bytes representing the RSA parameter n (the modulus) in internet order,
  4. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter n,
  5. 4-byte count of following bytes representing the RSA parameter e (the public exponent) in internet order,
  6. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter e.
intgetFormatID()

Method Detail

decodePrivateKey

public PrivateKey decodePrivateKey(byte[] k)

decodePublicKey

public PublicKey decodePublicKey(byte[] k)

encodePrivateKey

public byte[] encodePrivateKey(PrivateKey key)

Returns the encoded form of the designated RSA private key according to the Raw format supported by this library.

The Raw format for an RSA private key, in this implementation, is a byte sequence consisting of the following:

  1. 4-byte magic consisting of the value of the literal MAGIC_RAW_RSA_PRIVATE_KEY,
  2. 1-byte version consisting of the constant: 0x01,
  3. 4-byte count of following bytes representing the RSA parameter p (the first prime factor of the modulus) in internet order,
  4. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter p,
  5. 4-byte count of following bytes representing the RSA parameter q (the second prime factor of the modulus) in internet order,
  6. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter q,
  7. 4-byte count of following bytes representing the RSA parameter e (the public exponent) in internet order,
  8. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter e,
  9. 4-byte count of following bytes representing the RSA parameter d (the private exponent) in internet order,
  10. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter d,

Parameters: key the key to encode.

Returns: the Raw format encoding of the designated key.

encodePublicKey

public byte[] encodePublicKey(PublicKey key)

Returns the encoded form of the designated RSA public key according to the Raw format supported by this library.

The Raw format for an RSA public key, in this implementation, is a byte sequence consisting of the following:

  1. 4-byte magic consisting of the value of the literal MAGIC_RAW_RSA_PUBLIC_KEY,
  2. 1-byte version consisting of the constant: 0x01,
  3. 4-byte count of following bytes representing the RSA parameter n (the modulus) in internet order,
  4. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter n,
  5. 4-byte count of following bytes representing the RSA parameter e (the public exponent) in internet order,
  6. n-bytes representation of a BigInteger obtained by invoking the toByteArray() method on the RSA parameter e.

Parameters: key the key to encode.

Returns: the Raw format encoding of the designated key.

Throws: IllegalArgumentException if the designated key is not an RSA one.

getFormatID

public int getFormatID()
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