public static ICipherParameters GetCipherParameters(
string algorithm,
ICipherParameters key,
Asn1Object asn1Params)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string upper = algorithm.ToUpper(CultureInfo.InvariantCulture);
string mechanism = (string)algorithms[upper];
if (mechanism == null)
{
mechanism = upper;
}
byte[] iv = null;
try
{
switch (mechanism)
{
case "AES":
case "BLOWFISH":
case "DES":
case "DESEDE":
case "RIJNDAEL":
case "SKIPJACK":
case "TWOFISH":
iv = ((Asn1OctetString)asn1Params).GetOctets();
break;
case "RC2":
iv = RC2CbcParameter.GetInstance(asn1Params).GetIV();
break;
case "IDEA":
iv = IdeaCbcPar.GetInstance(asn1Params).GetIV();
break;
case "CAST5":
iv = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
break;
}
}
catch (Exception e)
{
throw new ArgumentException("Could not process ASN.1 parameters", "asn1Params", e);
}
if (iv != null)
{
return(new ParametersWithIV(key, iv));
}
throw new SecurityUtilityException("Algorithm " + mechanism + " not recognised.");
}
public static ICipherParameters GetCipherParameters(
string algorithm,
ICipherParameters key,
Asn1Object asn1Params)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonical = GetCanonicalAlgorithmName(algorithm);
if (canonical == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
byte[] iv = null;
try
{
// TODO These algorithms support an IV
// but JCE doesn't seem to provide an AlgorithmParametersGenerator for them
// "RIJNDAEL", "SKIPJACK", "TWOFISH"
int basicIVKeySize = FindBasicIVSize(canonical);
if (basicIVKeySize != -1 ||
canonical == "RIJNDAEL" || canonical == "SKIPJACK" || canonical == "TWOFISH")
{
iv = ((Asn1OctetString)asn1Params).GetOctets();
}
else if (canonical == "CAST5")
{
iv = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
}
#if INCLUDE_IDEA
else if (canonical == "IDEA")
{
iv = IdeaCbcPar.GetInstance(asn1Params).GetIV();
}
#endif
else if (canonical == "RC2")
{
iv = RC2CbcParameter.GetInstance(asn1Params).GetIV();
}
}
catch (Exception e)
{
throw new ArgumentException("Could not process ASN.1 parameters", e);
}
if (iv != null)
{
return(new ParametersWithIV(key, iv));
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
public static ICipherParameters GetCipherParameters(string algorithm, ICipherParameters key, Asn1Object asn1Params)
{
//IL_0008: Unknown result type (might be due to invalid IL or missing references)
//IL_00c8: Unknown result type (might be due to invalid IL or missing references)
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonicalAlgorithmName = GetCanonicalAlgorithmName(algorithm);
if (canonicalAlgorithmName == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
byte[] array = null;
try
{
int num = FindBasicIVSize(canonicalAlgorithmName);
if (num != -1 || canonicalAlgorithmName == "RIJNDAEL" || canonicalAlgorithmName == "SKIPJACK" || canonicalAlgorithmName == "TWOFISH")
{
array = ((Asn1OctetString)asn1Params).GetOctets();
}
else if (canonicalAlgorithmName == "CAST5")
{
array = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
}
else if (canonicalAlgorithmName == "IDEA")
{
array = IdeaCbcPar.GetInstance(asn1Params).GetIV();
}
else if (canonicalAlgorithmName == "RC2")
{
array = RC2CbcParameter.GetInstance(asn1Params).GetIV();
}
}
catch (global::System.Exception ex)
{
throw new ArgumentException("Could not process ASN.1 parameters", ex);
}
if (array != null)
{
return(new ParametersWithIV(key, array));
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
public static ICipherParameters GetCipherParameters(string algorithm, ICipherParameters key, Asn1Object asn1Params)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonicalAlgorithmName = ParameterUtilities.GetCanonicalAlgorithmName(algorithm);
if (canonicalAlgorithmName == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
byte[] array = null;
try
{
int num = ParameterUtilities.FindBasicIVSize(canonicalAlgorithmName);
if (num != -1 || canonicalAlgorithmName == "RIJNDAEL" || canonicalAlgorithmName == "SKIPJACK" || canonicalAlgorithmName == "TWOFISH")
{
array = ((Asn1OctetString)asn1Params).GetOctets();
}
else if (canonicalAlgorithmName == "CAST5")
{
array = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
}
else if (canonicalAlgorithmName == "IDEA")
{
array = IdeaCbcPar.GetInstance(asn1Params).GetIV();
}
else if (canonicalAlgorithmName == "RC2")
{
array = RC2CbcParameter.GetInstance(asn1Params).GetIV();
}
}
catch (Exception innerException)
{
throw new ArgumentException("Could not process ASN.1 parameters", innerException);
}
if (array != null)
{
return(new ParametersWithIV(key, array));
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
public static ICipherParameters GetCipherParameters(
string algorithm,
ICipherParameters key,
Asn1Object asn1Params)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonical = GetCanonicalAlgorithmName(algorithm);
if (canonical == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
byte[] iv = null;
try
{
switch (canonical)
{
case "AES":
case "AES128":
case "AES192":
case "AES256":
case "BLOWFISH":
case "CAMELLIA":
case "CAMELLIA128":
case "CAMELLIA192":
case "CAMELLIA256":
case "DES":
case "DESEDE":
case "DESEDE3":
case "NOEKEON":
case "RIJNDAEL":
case "SEED":
case "SKIPJACK":
case "TWOFISH":
iv = ((Asn1OctetString)asn1Params).GetOctets();
break;
case "RC2":
iv = RC2CbcParameter.GetInstance(asn1Params).GetIV();
break;
case "IDEA":
iv = IdeaCbcPar.GetInstance(asn1Params).GetIV();
break;
case "CAST5":
iv = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
break;
}
}
catch (Exception e)
{
throw new ArgumentException("Could not process ASN.1 parameters", e);
}
if (iv != null)
{
return(new ParametersWithIV(key, iv));
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
