File	Doc	Category	Size	Date	Package
RC5ParameterSpec.java	API Doc	Android 1.5 API	7012	Wed May 06 22:41:02 BST 2009	javax.crypto.spec

RC5ParameterSpec

• java.lang.Object

Fields Summary
private final int	version
private final int	rounds
private final int	wordSize
private final byte[]	iv

Constructors Summary
public RC5ParameterSpec(int version, int rounds, int wordSize) Creates a new RC5ParameterSpec instance with the specified version, round count an word size (in bits). param version the version. param rounds the round count. param wordSize the word size (in bits). this.version = version; this.rounds = rounds; this.wordSize = wordSize; this.iv = null;
public RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv) Creates a new RC5ParameterSpec instance with the specified version, round count, word size (in bits) and an initialization vector. The size of the initialization vector must be at least 2 * (wordSize / 8) bytes which are copied to protect them against modification. param version the version. param rounds the round count. param wordSize the word size (in bits). param iv the initialization vector. throws IllegalArgumentException if the initialization vector is null or shorter than 2 * (wordSize / 8). if (iv == null) { throw new IllegalArgumentException(Messages.getString("crypto.31")); //$NON-NLS-1$ } if (iv.length < 2 * (wordSize / 8)) { throw new IllegalArgumentException( Messages.getString("crypto.32")); //$NON-NLS-1$ } this.version = version; this.rounds = rounds; this.wordSize = wordSize; this.iv = new byte[2*(wordSize/8)]; System.arraycopy(iv, 0, this.iv, 0, 2*(wordSize/8));
public RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv, int offset) Creates a new RC5ParameterSpec instance with the specified version, round count, wordSize (in bits), an initialization vector and an offset. The size of the initialization vector must be at least offset + (2 * (wordSize / 8)) bytes. The bytes starting at offset are copied to protect them against modification. param version the version. param rounds the round count. param wordSize the word size (in bits). param iv the initialization vector. param offset the offset in the initialization vector. throws IllegalArgumentException if the initialization vector is null of shorter than offset + (2 * (wordSize / 8)). throws ArrayIndexOutOfBoundsException if offset is negative. if (iv == null) { throw new IllegalArgumentException(Messages.getString("crypto.31")); //$NON-NLS-1$ } if (offset < 0) { throw new ArrayIndexOutOfBoundsException(Messages.getString("crypto.33")); //$NON-NLS-1$ } if (iv.length - offset < 2 * (wordSize / 8)) { throw new IllegalArgumentException( Messages.getString("crypto.34")); //$NON-NLS-1$ } this.version = version; this.rounds = rounds; this.wordSize = wordSize; this.iv = new byte[offset+2*(wordSize/8)]; System.arraycopy(iv, offset, this.iv, 0, 2*(wordSize/8));

Methods Summary
public boolean	equals(java.lang.Object obj) Compares the specified object with this RC5ParameterSpec instance. param obj the object to compare. return true if version, round count, word size and initializaion vector of both objects are equal, otherwise false. if (obj == this) { return true; } if (!(obj instanceof RC5ParameterSpec)) { return false; } RC5ParameterSpec ps = (RC5ParameterSpec) obj; return (version == ps.version) && (rounds == ps.rounds) && (wordSize == ps.wordSize) && (Arrays.equals(iv, ps.iv));
public byte[]	getIV() Returns a copy of the initialization vector. return a copy of the initialization vector, or null if none specified. if (iv == null) { return null; } byte[] result = new byte[iv.length]; System.arraycopy(iv, 0, result, 0, iv.length); return result;
public int	getRounds() Returns the round count. return the round count. return rounds;
public int	getVersion() Returns the version. return the version. return version;
public int	getWordSize() Returns the word size (in bits). return the word size (in bits). return wordSize;
public int	hashCode() Returns the hash code of this RC5ParameterSpec instance. return the hash code. int result = version + rounds + wordSize; if (iv == null) { return result; } for (byte element : iv) { result += element & 0xFF; } return result;