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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.
package org.bouncycastle.asn1.test;
import java.math.BigInteger;
import org.bouncycastle.asn1.ASN1Enumerated;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.util.BigIntegers;
import org.bouncycastle.util.Properties;
import org.bouncycastle.util.encoders.Base64;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
public class ASN1IntegerTest
extends SimpleTest
{
private static final byte[] suspectKey = Base64.decode(
"MIGJAoGBAHNc+iExm94LUrJdPSJ4QJ9tDRuvaNmGVHpJ4X7a5zKI02v+2E7RotuiR2MHDJfVJkb9LUs2kb3XBlyENhtMLsbeH+3Muy3" +
"hGDlh/mLJSh1s4c5jDKBRYOHom7Uc8wP0P2+zBCA+OEdikNDFBaP5PbR2Xq9okG2kPh35M2quAiMTAgMBAAE=");
public String getName()
{
return "ASN1Integer";
}
public void performTest()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "true");
ASN1Sequence.getInstance(suspectKey);
testValidEncodingSingleByte();
testValidEncodingMultiByte();
testInvalidEncoding_00();
testInvalidEncoding_ff();
testInvalidEncoding_00_32bits();
testInvalidEncoding_ff_32bits();
//testLooseInvalidValidEncoding_FF_32B();
//testLooseInvalidValidEncoding_zero_32B();
testLooseValidEncoding_zero_32BAligned();
testLooseValidEncoding_FF_32BAligned();
testLooseValidEncoding_FF_32BAligned_1not0();
testLooseValidEncoding_FF_32BAligned_2not0();
testOversizedEncoding();
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "true");
new ASN1Integer(Hex.decode("ffda47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b0e"));
new ASN1Enumerated(Hex.decode("005a47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b0e"));
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
try
{
new ASN1Integer(Hex.decode("ffda47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b"));
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
isTrue(!Properties.setThreadOverride("org.bouncycastle.asn1.allow_unsafe_integer", true));
new ASN1Integer(Hex.decode("ffda47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b"));
isTrue(Properties.removeThreadOverride("org.bouncycastle.asn1.allow_unsafe_integer"));
try
{
ASN1Sequence.getInstance(suspectKey);
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("test 1", "failed to construct sequence from byte[]: corrupted stream detected", e.getMessage());
}
try
{
new ASN1Integer(Hex.decode("ffda47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b0e"));
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
try
{
new ASN1Enumerated(Hex.decode("ffda47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b0e"));
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("malformed enumerated", e.getMessage());
}
try
{
new ASN1Enumerated(Hex.decode("005a47bfc776bcd269da4832626ac332adfca6dd835e8ecd83cd1ebe7d709b0e"));
fail("no exception");
}
catch (IllegalArgumentException e)
{
isEquals("malformed enumerated", e.getMessage());
}
}
/**
* Ensure existing single byte behavior.
*/
public void testValidEncodingSingleByte()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Without property, single byte.
//
byte[] rawInt = Hex.decode("10");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(i.getValue().intValue(), 16);
isEquals(i.intValueExact(), 16);
//
// With property set.
//
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "true");
rawInt = Hex.decode("10");
i = new ASN1Integer(rawInt);
isEquals(i.getValue().intValue(), 16);
isEquals(i.intValueExact(), 16);
}
public void testValidEncodingMultiByte()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Without property, single byte.
//
byte[] rawInt = Hex.decode("10FF");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(i.getValue().intValue(), 4351);
isEquals(i.intValueExact(), 4351);
//
// With property set.
//
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "true");
rawInt = Hex.decode("10FF");
i = new ASN1Integer(rawInt);
isEquals(i.getValue().intValue(), 4351);
isEquals(i.intValueExact(), 4351);
}
public void testInvalidEncoding_00()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
try
{
byte[] rawInt = Hex.decode("0010FF");
new ASN1Integer(rawInt);
fail("Expecting illegal argument exception.");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
public void testInvalidEncoding_ff()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
try
{
byte[] rawInt = Hex.decode("FF81FF");
new ASN1Integer(rawInt);
fail("Expecting illegal argument exception.");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
public void testInvalidEncoding_00_32bits()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Check what would pass loose validation fails outside of loose validation.
//
try
{
byte[] rawInt = Hex.decode("0000000010FF");
new ASN1Integer(rawInt);
fail("Expecting illegal argument exception.");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
public void testInvalidEncoding_ff_32bits()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Check what would pass loose validation fails outside of loose validation.
//
try
{
byte[] rawInt = Hex.decode("FFFFFFFF01FF");
new ASN1Integer(rawInt);
fail("Expecting illegal argument exception.");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
/*
Unfortunately it turns out that integers stored without sign bits that are assumed to be
unsigned.. this means a string of FF may occur and then the user will call getPositiveValue().
Sigh..
public void testLooseInvalidValidEncoding_zero_32B()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should still fail as loose validation only permits 3 leading 0x00 bytes.
//
try
{
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("0000000010FF");
ASN1Integer i = new ASN1Integer(rawInt);
fail("Expecting illegal argument exception.");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
public void testLooseInvalidValidEncoding_FF_32B()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should still fail as loose validation only permits 3 leading 0xFF bytes.
//
try
{
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("FFFFFFFF10FF");
ASN1Integer i = new ASN1Integer(rawInt);
fail("Expecting illegal argument exception.");
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
*/
public void testLooseValidEncoding_zero_32BAligned()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should pass as loose validation permits 3 leading 0x00 bytes.
//
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("00000010FF000000");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(72997666816L, BigIntegers.longValueExact(i.getValue()));
}
public void testLooseValidEncoding_FF_32BAligned()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should pass as loose validation permits 3
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("FFFFFF10FF000000");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(-1026513960960L, BigIntegers.longValueExact(i.getValue()));
}
public void testLooseValidEncoding_FF_32BAligned_1not0()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should pass as loose validation permits 3 leading 0xFF bytes.
//
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("FFFEFF10FF000000");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(-282501490671616L, BigIntegers.longValueExact(i.getValue()));
}
public void testLooseValidEncoding_FF_32BAligned_2not0()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should pass as loose validation permits 3 leading 0xFF bytes.
//
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("FFFFFE10FF000000");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(-2126025588736L, BigIntegers.longValueExact(i.getValue()));
}
public void testOversizedEncoding()
throws Exception
{
System.setProperty("org.bouncycastle.asn1.allow_unsafe_integer", "false");
//
// Should pass as loose validation permits 3 leading 0xFF bytes.
//
System.getProperties().put("org.bouncycastle.asn1.allow_unsafe_integer", "true");
byte[] rawInt = Hex.decode("FFFFFFFE10FF000000000000");
ASN1Integer i = new ASN1Integer(rawInt);
isEquals(new BigInteger(Hex.decode("FFFFFFFE10FF000000000000")), i.getValue());
rawInt = Hex.decode("FFFFFFFFFE10FF000000000000");
try
{
new ASN1Integer(rawInt);
}
catch (IllegalArgumentException e)
{
isEquals("malformed integer", e.getMessage());
}
}
public static void main(
String[] args)
{
runTest(new ASN1IntegerTest());
}
}
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