|
public static RSAVP1 ( |
||
| rsa | ||
| s | byte | |
| return | byte[] | |
public static bool Verify_v15(RSA rsa, HashAlgorithm hash, byte[] hashValue, byte[] signature, bool tryNonStandardEncoding)
{
int num = rsa.KeySize >> 3;
byte[] s = PKCS1.OS2IP(signature);
byte[] x = PKCS1.RSAVP1(rsa, s);
byte[] array = PKCS1.I2OSP(x, num);
byte[] array2 = PKCS1.Encode_v15(hash, hashValue, num);
bool flag = PKCS1.Compare(array2, array);
if (flag || !tryNonStandardEncoding)
{
return(flag);
}
if (array[0] != 0 || array[1] != 1)
{
return(false);
}
int i;
for (i = 2; i < array.Length - hashValue.Length - 1; i++)
{
if (array[i] != 255)
{
return(false);
}
}
if (array[i++] != 0)
{
return(false);
}
byte[] array3 = new byte[hashValue.Length];
Buffer.BlockCopy(array, i, array3, 0, array3.Length);
return(PKCS1.Compare(array3, hashValue));
}
public static bool Verify_v15(
RSA rsa,
HashAlgorithm hash,
byte[] hashValue,
byte[] signature,
bool tryNonStandardEncoding)
{
int num = rsa.KeySize >> 3;
byte[] s = PKCS1.OS2IP(signature);
byte[] array2 = PKCS1.I2OSP(PKCS1.RSAVP1(rsa, s), num);
bool flag = PKCS1.Compare(PKCS1.Encode_v15(hash, hashValue, num), array2);
if (flag || !tryNonStandardEncoding)
{
return(flag);
}
if (array2[0] != (byte)0 || array2[1] != (byte)1)
{
return(false);
}
int index1;
for (index1 = 2; index1 < array2.Length - hashValue.Length - 1; ++index1)
{
if (array2[index1] != byte.MaxValue)
{
return(false);
}
}
byte[] numArray = array2;
int index2 = index1;
int srcOffset = index2 + 1;
if (numArray[index2] != (byte)0)
{
return(false);
}
byte[] array1 = new byte[hashValue.Length];
Buffer.BlockCopy((Array)array2, srcOffset, (Array)array1, 0, array1.Length);
return(PKCS1.Compare(array1, hashValue));
}
