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55 lines
1.9 KiB
55 lines
1.9 KiB
4 years ago
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package dev.openrs2.common.crypto
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import org.bouncycastle.crypto.params.RSAKeyParameters
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import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters
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import org.bouncycastle.util.Properties
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import java.math.BigInteger
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import kotlin.test.Test
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import kotlin.test.assertEquals
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object RsaTest {
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private const val ALLOW_UNSAFE_MOD = "org.bouncycastle.rsa.allow_unsafe_mod"
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@Test
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fun testEncrypt() {
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// from https://en.wikipedia.org/wiki/RSA_(cryptosystem)#Example
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val public = allowUnsafeMod { RSAKeyParameters(false, BigInteger("3233"), BigInteger("17")) }
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val ciphertext = Rsa.encrypt(BigInteger("65"), public)
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assertEquals(BigInteger("2790"), ciphertext)
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}
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@Test
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fun testDecrypt() {
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// from https://en.wikipedia.org/wiki/RSA_(cryptosystem)#Example
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val public = allowUnsafeMod { RSAKeyParameters(true, BigInteger("3233"), BigInteger("413")) }
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val ciphertext = Rsa.decrypt(BigInteger("2790"), public)
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assertEquals(BigInteger("65"), ciphertext)
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}
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@Test
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fun testDecryptCrt() {
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// from https://en.wikipedia.org/wiki/RSA_(cryptosystem)#Example
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val private = allowUnsafeMod { RSAPrivateCrtKeyParameters(
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BigInteger("3233"), // modulus
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BigInteger("17"), // public exponent
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BigInteger("413"), // private exponent
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BigInteger("61"), // p
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BigInteger("53"), // q
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BigInteger("53"), // dP
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BigInteger("49"), // dQ
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BigInteger("38") // qInv
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) }
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val ciphertext = Rsa.decrypt(BigInteger("2790"), private)
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assertEquals(BigInteger("65"), ciphertext)
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}
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private fun <T> allowUnsafeMod(f: () -> T): T {
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Properties.setThreadOverride(ALLOW_UNSAFE_MOD, true)
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try {
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return f()
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} finally {
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Properties.setThreadOverride(ALLOW_UNSAFE_MOD, false)
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}
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}
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}
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