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public ConvertInput ( byte inBuf, int inOff, int inLen ) : |
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| inBuf | byte | |
| inOff | int | |
| inLen | int | |
| return | ||
public virtual byte[] ProcessBlock(byte[] inBuf, int inOff, int inLen)
{
BigInteger bigInteger = core.ConvertInput(inBuf, inOff, inLen);
bigInteger = ((!forEncryption) ? UnblindMessage(bigInteger) : BlindMessage(bigInteger));
return(core.ConvertOutput(bigInteger));
}
public virtual byte[] ProcessBlock(byte[] inBuf, int inOff, int inLen)
{
if (key == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
BigInteger bigInteger = core.ConvertInput(inBuf, inOff, inLen);
BigInteger result;
if (key is RsaPrivateCrtKeyParameters)
{
RsaPrivateCrtKeyParameters rsaPrivateCrtKeyParameters = (RsaPrivateCrtKeyParameters)key;
BigInteger publicExponent = rsaPrivateCrtKeyParameters.PublicExponent;
if (publicExponent != null)
{
BigInteger modulus = rsaPrivateCrtKeyParameters.Modulus;
BigInteger bigInteger2 = BigIntegers.CreateRandomInRange(BigInteger.One, modulus.Subtract(BigInteger.One), random);
BigInteger input = bigInteger2.ModPow(publicExponent, modulus).Multiply(bigInteger).Mod(modulus);
BigInteger bigInteger3 = core.ProcessBlock(input);
BigInteger val = bigInteger2.ModInverse(modulus);
result = bigInteger3.Multiply(val).Mod(modulus);
}
else
{
result = core.ProcessBlock(bigInteger);
}
}
else
{
result = core.ProcessBlock(bigInteger);
}
return(core.ConvertOutput(result));
}
/**
* Process a single block using the basic RSA algorithm.
*
* @param inBuf the input array.
* @param inOff the offset into the input buffer where the data starts.
* @param inLen the length of the data to be processed.
* @return the result of the RSA process.
* @exception DataLengthException the input block is too large.
*/
public byte[] ProcessBlock(
byte[] inBuf,
int inOff,
int inLen)
{
if (key == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
BigInteger input = core.ConvertInput(inBuf, inOff, inLen);
BigInteger result;
if (key is RsaPrivateCrtKeyParameters)
{
RsaPrivateCrtKeyParameters k = (RsaPrivateCrtKeyParameters)key;
BigInteger m = k.Modulus;
BigInteger r = calculateR(m);
BigInteger blindedInput = r.ModPow(k.PublicExponent, m).Multiply(input).Mod(m);
BigInteger blindedResult = core.ProcessBlock(blindedInput);
result = blindedResult.Multiply(r.ModInverse(m)).Mod(m);
}
else
{
result = core.ProcessBlock(input);
}
return(core.ConvertOutput(result));
}
public virtual byte[] ProcessBlock(byte[] inBuf, int inOff, int inLen)
{
//IL_000d: Unknown result type (might be due to invalid IL or missing references)
if (core == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
return(core.ConvertOutput(core.ProcessBlock(core.ConvertInput(inBuf, inOff, inLen))));
}
/**
* Process a single block using the basic RSA algorithm.
*
* @param inBuf the input array.
* @param inOff the offset into the input buffer where the data starts.
* @param inLen the length of the data to be processed.
* @return the result of the RSA process.
* @exception DataLengthException the input block is too large.
*/
public byte[] ProcessBlock(
byte[] inBuf,
int inOff,
int inLen)
{
if (core == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
return(core.ConvertOutput(core.ProcessBlock(core.ConvertInput(inBuf, inOff, inLen))));
}
/**
* Process a single block using the basic RSA algorithm.
*
* @param inBuf the input array.
* @param inOff the offset into the input buffer where the data starts.
* @param inLen the length of the data to be processed.
* @return the result of the RSA process.
* @exception DataLengthException the input block is too large.
*/
public virtual byte[] ProcessBlock(
byte[] inBuf,
int inOff,
int inLen)
{
if (key == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
BigInteger input = core.ConvertInput(inBuf, inOff, inLen);
BigInteger result;
if (key is RsaPrivateCrtKeyParameters)
{
RsaPrivateCrtKeyParameters k = (RsaPrivateCrtKeyParameters)key;
BigInteger e = k.PublicExponent;
if (e != null) // can't do blinding without a public exponent
{
BigInteger m = k.Modulus;
BigInteger r = BigIntegers.CreateRandomInRange(
BigInteger.One, m.Subtract(BigInteger.One), random);
BigInteger blindedInput = r.ModPow(e, m).Multiply(input).Mod(m);
BigInteger blindedResult = core.ProcessBlock(blindedInput);
BigInteger rInv = r.ModInverse(m);
result = blindedResult.Multiply(rInv).Mod(m);
// defence against Arjen Lenstra�s CRT attack
if (!input.Equals(result.ModPow(e, m)))
{
throw new InvalidOperationException("RSA engine faulty decryption/signing detected");
}
}
else
{
result = core.ProcessBlock(input);
}
}
else
{
result = core.ProcessBlock(input);
}
return(core.ConvertOutput(result));
}
/**
* Process a single block using the RSA blinding algorithm.
*
* @param in the input array.
* @param inOff the offset into the input buffer where the data starts.
* @param inLen the length of the data to be processed.
* @return the result of the RSA process.
* @throws DataLengthException the input block is too large.
*/
public byte[] ProcessBlock(
byte[] inBuf,
int inOff,
int inLen)
{
BigInteger msg = core.ConvertInput(inBuf, inOff, inLen);
if (forEncryption)
{
msg = BlindMessage(msg);
}
else
{
msg = UnblindMessage(msg);
}
return(core.ConvertOutput(msg));
}
/**
* Process a single block using the basic RSA algorithm.
*
* @param inBuf the input array.
* @param inOff the offset into the input buffer where the data starts.
* @param inLen the length of the data to be processed.
* @return the result of the RSA process.
* @exception DataLengthException the input block is too large.
*/
public byte[] ProcessBlock(
byte[] inBuf,
int inOff,
int inLen)
{
if (key == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
IBigInteger input = core.ConvertInput(inBuf, inOff, inLen);
IBigInteger result;
if (key is RsaPrivateCrtKeyParameters)
{
RsaPrivateCrtKeyParameters k = (RsaPrivateCrtKeyParameters)key;
IBigInteger e = k.PublicExponent;
if (e != null) // can't do blinding without a public exponent
{
IBigInteger m = k.Modulus;
IBigInteger r = BigIntegers.CreateRandomInRange(
BigInteger.One, m.Subtract(BigInteger.One), random);
IBigInteger blindedInput = r.ModPow(e, m).Multiply(input).Mod(m);
IBigInteger blindedResult = core.ProcessBlock(blindedInput);
IBigInteger rInv = r.ModInverse(m);
result = blindedResult.Multiply(rInv).Mod(m);
}
else
{
result = core.ProcessBlock(input);
}
}
else
{
result = core.ProcessBlock(input);
}
return(core.ConvertOutput(result));
}
public virtual byte[] ProcessBlock(byte[] inBuf, int inOff, int inLen)
{
//IL_000d: Unknown result type (might be due to invalid IL or missing references)
//IL_00cb: Unknown result type (might be due to invalid IL or missing references)
if (key == null)
{
throw new InvalidOperationException("RSA engine not initialised");
}
BigInteger bigInteger = core.ConvertInput(inBuf, inOff, inLen);
BigInteger bigInteger4;
if (key is RsaPrivateCrtKeyParameters)
{
RsaPrivateCrtKeyParameters rsaPrivateCrtKeyParameters = (RsaPrivateCrtKeyParameters)key;
BigInteger publicExponent = rsaPrivateCrtKeyParameters.PublicExponent;
if (publicExponent != null)
{
BigInteger modulus = rsaPrivateCrtKeyParameters.Modulus;
BigInteger bigInteger2 = BigIntegers.CreateRandomInRange(BigInteger.One, modulus.Subtract(BigInteger.One), random);
BigInteger input = bigInteger2.ModPow(publicExponent, modulus).Multiply(bigInteger).Mod(modulus);
BigInteger bigInteger3 = core.ProcessBlock(input);
BigInteger val = bigInteger2.ModInverse(modulus);
bigInteger4 = bigInteger3.Multiply(val).Mod(modulus);
if (!bigInteger.Equals(bigInteger4.ModPow(publicExponent, modulus)))
{
throw new InvalidOperationException("RSA engine faulty decryption/signing detected");
}
}
else
{
bigInteger4 = core.ProcessBlock(bigInteger);
}
}
else
{
bigInteger4 = core.ProcessBlock(bigInteger);
}
return(core.ConvertOutput(bigInteger4));
}