| static private GetCanonicalKeyGeneratorAlgorithm ( string algorithm ) : string | ||
| algorithm | string | |
| return | string | |
public static CipherKeyGenerator GetKeyGenerator(string algorithm)
{
string canonicalKeyGeneratorAlgorithm = GeneratorUtilities.GetCanonicalKeyGeneratorAlgorithm(algorithm);
if (canonicalKeyGeneratorAlgorithm == null)
{
throw new SecurityUtilityException("KeyGenerator " + algorithm + " not recognised.");
}
int num = GeneratorUtilities.FindDefaultKeySize(canonicalKeyGeneratorAlgorithm);
if (num == -1)
{
throw new SecurityUtilityException(string.Concat(new string[]
{
"KeyGenerator ",
algorithm,
" (",
canonicalKeyGeneratorAlgorithm,
") not supported."
}));
}
if (canonicalKeyGeneratorAlgorithm == "DES")
{
return(new DesKeyGenerator(num));
}
if (canonicalKeyGeneratorAlgorithm == "DESEDE" || canonicalKeyGeneratorAlgorithm == "DESEDE3")
{
return(new DesEdeKeyGenerator(num));
}
return(new CipherKeyGenerator(num));
}
internal static int GetDefaultKeySize(string algorithm)
{
string canonicalKeyGeneratorAlgorithm = GeneratorUtilities.GetCanonicalKeyGeneratorAlgorithm(algorithm);
if (canonicalKeyGeneratorAlgorithm == null)
{
throw new SecurityUtilityException("KeyGenerator " + algorithm + " not recognised.");
}
int num = GeneratorUtilities.FindDefaultKeySize(canonicalKeyGeneratorAlgorithm);
if (num == -1)
{
throw new SecurityUtilityException(string.Concat(new string[]
{
"KeyGenerator ",
algorithm,
" (",
canonicalKeyGeneratorAlgorithm,
") not supported."
}));
}
return(num);
}