declare namespace javax {
    namespace crypto {
        namespace spec {
            /**
             * This class specifies an <i>initialization vector</i> (IV).
             * Examples which use IVs are ciphers in feedback mode,
             * e.g., DES in CBC mode and RSA ciphers with OAEP encoding
             * operation.
             * @author Jan Luehe
             * @since 1.4
             */
            // @ts-ignore
            class IvParameterSpec extends java.lang.Object implements java.security.spec.AlgorithmParameterSpec {
                /**
                 * Creates an IvParameterSpec object using the bytes in <code>iv</code>
                 * as the IV.
                 * @param iv the buffer with the IV. The contents of the
                 *  buffer are copied to protect against subsequent modification.
                 * @throws NullPointerException if <code>iv</code> is <code>null</code>
                 */
                // @ts-ignore
                constructor(iv: number /*byte*/[])
                /**
                 * Creates an IvParameterSpec object using the first <code>len</code>
                 * bytes in <code>iv</code>, beginning at <code>offset</code>
                 * inclusive, as the IV.
                 * <p> The bytes that constitute the IV are those between
                 * <code>iv[offset]</code> and <code>iv[offset+len-1]</code> inclusive.
                 * @param iv the buffer with the IV. The first <code>len</code>
                 *  bytes of the buffer beginning at <code>offset</code> inclusive
                 *  are copied to protect against subsequent modification.
                 * @param offset the offset in <code>iv</code> where the IV
                 *  starts.
                 * @param len the number of IV bytes.
                 * @throws IllegalArgumentException if <code>iv</code> is <code>null</code>
                 *  or {#code (iv.length - offset < len)}
                 * @throws ArrayIndexOutOfBoundsException is thrown if <code>offset</code>
                 *  or <code>len</code> index bytes outside the <code>iv</code>.
                 */
                // @ts-ignore
                constructor(iv: number /*byte*/[], offset: number /*int*/, len: number /*int*/)
                /**
                 * Returns the initialization vector (IV).
                 * @return the initialization vector (IV). Returns a new array
                 *  each time this method is called.
                 */
                // @ts-ignore
                public getIV(): number /*byte*/[]
            }
        }
    }
}