| /* GENERATED SOURCE. DO NOT MODIFY. */ |
| package com.android.internal.org.bouncycastle.crypto.params; |
| |
| import java.math.BigInteger; |
| |
| import com.android.internal.org.bouncycastle.util.Properties; |
| |
| /** |
| * @hide This class is not part of the Android public SDK API |
| */ |
| public class RSAKeyParameters |
| extends AsymmetricKeyParameter |
| { |
| // Hexadecimal value of the product of the 131 smallest odd primes from 3 to 743 |
| private static final BigInteger SMALL_PRIMES_PRODUCT = new BigInteger( |
| "8138e8a0fcf3a4e84a771d40fd305d7f4aa59306d7251de54d98af8fe95729a1f" |
| + "73d893fa424cd2edc8636a6c3285e022b0e3866a565ae8108eed8591cd4fe8d2" |
| + "ce86165a978d719ebf647f362d33fca29cd179fb42401cbaf3df0c614056f9c8" |
| + "f3cfd51e474afb6bc6974f78db8aba8e9e517fded658591ab7502bd41849462f", |
| 16); |
| |
| private static final BigInteger ONE = BigInteger.valueOf(1); |
| |
| private BigInteger modulus; |
| private BigInteger exponent; |
| |
| public RSAKeyParameters( |
| boolean isPrivate, |
| BigInteger modulus, |
| BigInteger exponent) |
| { |
| super(isPrivate); |
| |
| if (!isPrivate) |
| { |
| if ((exponent.intValue() & 1) == 0) |
| { |
| throw new IllegalArgumentException("RSA publicExponent is even"); |
| } |
| } |
| |
| this.modulus = validate(modulus); |
| this.exponent = exponent; |
| } |
| |
| private BigInteger validate(BigInteger modulus) |
| { |
| if ((modulus.intValue() & 1) == 0) |
| { |
| throw new IllegalArgumentException("RSA modulus is even"); |
| } |
| |
| // If you need to set this you need to have a serious word to whoever is generating |
| // your keys. |
| if (Properties.isOverrideSet("com.android.internal.org.bouncycastle.rsa.allow_unsafe_mod")) |
| { |
| return modulus; |
| } |
| |
| if (!modulus.gcd(SMALL_PRIMES_PRODUCT).equals(ONE)) |
| { |
| throw new IllegalArgumentException("RSA modulus has a small prime factor"); |
| } |
| |
| // TODO: add additional primePower/Composite test - expensive!! |
| |
| return modulus; |
| } |
| |
| public BigInteger getModulus() |
| { |
| return modulus; |
| } |
| |
| public BigInteger getExponent() |
| { |
| return exponent; |
| } |
| } |