|
private static CreateIV ( |
||
| random | ||
| ivLength | int | |
| Результат | byte[] | |
public static Asn1Encodable GenerateParameters(string algorithm, SecureRandom random)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonicalAlgorithmName = ParameterUtilities.GetCanonicalAlgorithmName(algorithm);
if (canonicalAlgorithmName == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
int num = ParameterUtilities.FindBasicIVSize(canonicalAlgorithmName);
if (num != -1)
{
return(ParameterUtilities.CreateIVOctetString(random, num));
}
if (canonicalAlgorithmName == "CAST5")
{
return(new Cast5CbcParameters(ParameterUtilities.CreateIV(random, 8), 128));
}
if (canonicalAlgorithmName == "IDEA")
{
return(new IdeaCbcPar(ParameterUtilities.CreateIV(random, 8)));
}
if (canonicalAlgorithmName == "RC2")
{
return(new RC2CbcParameter(ParameterUtilities.CreateIV(random, 8)));
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
private static Asn1OctetString CreateIVOctetString(SecureRandom random, int ivLength)
{
return(new DerOctetString(ParameterUtilities.CreateIV(random, ivLength)));
}