File	Doc	Category	Size	Date	Package
RSAKey.java	API Doc	phoneME MR2 API (J2ME)	5821	Wed May 02 18:00:24 BST 2007	com.sun.midp.crypto

RSAKey

• java.lang.Object

Fields Summary
byte[]	exp Local variable to hold the exponent.
byte[]	mod The number of bytes allocated to the modulus is always a multiple of 8.

Constructors Summary

RSAKey(byte[] modulus, int modOffset, int modLen, byte[] exponent, int expOffset, int expLen) Constructor for RSA public key. param modulus modulus of key to process param modOffset offset of the modulus param modLen length of modulus in bytes param exponent exponent the key param expOffset offset of the exponent param expLen length of the exponent in bytes setModulus(modulus, modOffset, modLen); setExponent(exponent, expOffset, expLen);

Methods Summary
public boolean	equals(RSAPrivateKey k) Compare the current key as a RSA private key. param k the key to compare return true if the kesy are the same. return equals((RSAKey) k);
public boolean	equals(RSAPublicKey k) Compare the current key as a RSA public key. param k the key to compare return true if the keys are the same. return equals((RSAKey) k);
public boolean	equals(com.sun.midp.crypto.RSAKey k) Compare the current key as a generic RSA key. param k the key to compare return true if the keys are the same. byte[] kexp = new byte[exp.length]; byte[] kmod = new byte[mod.length]; if (this.getClass() != k.getClass()) return false; if (k.getExponent(kexp, (short) 0) != exp.length) return false; if (k.getModulus(kmod, (short) 0) != mod.length) return false; for (int i = 0; i < exp.length; i++) if (kexp[i] != exp[i]) return false; for (int i = 0; i < mod.length; i++) if (kmod[i] != mod[i]) return false; return true;
public java.lang.String	getAlgorithm() Gets the type of the current key. return the type of the key return "RSA";
public byte[]	getEncoded() Returns the encoding of key. return null because there is no encoding return null;
public short	getExponent(byte[] buf, short off) Get the exponent for the key. param buf output buffer to hold the exponent param off offset in the buffer to copy the exponent return length of the data copied if (off + exp.length > buf.length) return 0; System.arraycopy(exp, 0, buf, off, exp.length); return ((short) exp.length);
public java.lang.String	getFormat() Returns the name of the encoding format for this key. return the string "RAW". return "RAW";
public short	getModulus(byte[] buf, short off) Get the modulus for the key. param buf output buffer to hold the modulus param off offset in the buffer to copy the modulus return length of the data copied see #setModulus if (off + mod.length > buf.length) return ((short) 0); System.arraycopy(mod, 0, buf, off, mod.length); return ((short) mod.length);
public int	getModulusLen() Get the length of modulus for the key. return length of the modulus in bytes return mod.length;
private void	setExponent(byte[] buf, int off, int len) Set the exponent for the key. param buf input buffer which hold the exponent param off offset in the buffer param len length of the data to be copied see #getExponent exception IllegalArgumentException if exponent is too large exp = new byte[len]; System.arraycopy(buf, off, exp, 0, len);
private void	setModulus(byte[] buf, int off, int len) Set the modulus for the key. param buf input buffer which hold the modulus param off offset in the buffer param len length of the data to be copied in bytes see #getModulus // move modulus len out to a multiple of 64 bits (8 bytes) len = (len + 7) / 8 * 8; mod = new byte[len]; System.arraycopy(buf, off, mod, 0, len);
public java.lang.String	toString() Convert the key to a readable string. return string representation of key return ("[" + (getModulusLen() * 8) + "-bit RSA key" + ", Exponent: 0x" + Util.hexEncode(exp) + ", Modulus: 0x" + Util.hexEncode(mod) + "]");