| public static Decrypt ( byte cipherText, System.Security.Cryptography.CngKey key, CngAlgorithm hash ) : byte[] | ||
| cipherText | byte | |
| key | System.Security.Cryptography.CngKey | |
| hash | CngAlgorithm | |
| return | byte[] | |
public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
var privateKey = Ensure.Type <RSACryptoServiceProvider>(key, "RsaKeyManagement alg expects key to be of RSACryptoServiceProvider type.");
return(useSha256 ? RsaOaep.Decrypt(encryptedCek, RsaKey.New(privateKey.ExportParameters(true)), CngAlgorithm.Sha256)
: privateKey.Decrypt(encryptedCek, useRsaOaepPadding));
}
public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
#if NET40
if (key is CngKey cngKey)
{
return(RsaOaep.Decrypt(encryptedCek, cngKey, CngAlgorithm.Sha256));
}
else if (key is RSACryptoServiceProvider rsaKey)
{
//This is for backward compatibility only with 2.x
//To be removed in 3.x
var privateKey = RsaKey.New(rsaKey.ExportParameters(true));
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
}
throw new ArgumentException("RsaKeyManagement algorithm expects key to be of CngKey type.");
#elif NET461 || NET472
if (key is CngKey cngKey)
{
return(RsaOaep.Decrypt(encryptedCek, cngKey, CngAlgorithm.Sha256));
}
else if (key is RSACryptoServiceProvider rsaKey)
{
//This is for backward compatibility only with 2.x
//To be removed in 3.x
var privateKey = RsaKey.New(rsaKey.ExportParameters(true));
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
}
else if (key is RSA rsa)
{
return(rsa.Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
}
else if (key is Jwk jwk)
{
if (jwk.Kty == Jwk.KeyTypes.RSA)
{
return(jwk.RsaKey().Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
}
}
throw new ArgumentException("RsaKeyManagement algorithm expects key to be of CngKey, RSACryptoServiceProvider, RSA types or Jwk type with kty='rsa'.");
#elif NETSTANDARD
if (key is RSA rsa)
{
return(rsa.Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
}
else if (key is Jwk jwk)
{
if (jwk.Kty == Jwk.KeyTypes.RSA)
{
return(jwk.RsaKey().Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
}
}
throw new ArgumentException("RsaKeyManagement algorithm expects key to be of RSA type or Jwk type with kty='rsa'.");
#endif
}
public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
RSACryptoServiceProvider rSACryptoServiceProvider = Ensure.Type <RSACryptoServiceProvider>(key, "RsaKeyManagement alg expects key to be of RSACryptoServiceProvider type.", new object[0]);
if (!this.useSha256)
{
return(rSACryptoServiceProvider.Decrypt(encryptedCek, this.useRsaOaepPadding));
}
return(RsaOaep.Decrypt(encryptedCek, RsaKey.New(rSACryptoServiceProvider.ExportParameters(true)), CngAlgorithm.Sha256));
}
public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
#if NET40
var privateKey = Ensure.Type <CngKey>(key, "RsaKeyManagement alg expects key to be of RSACryptoServiceProvider type.");
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
#elif NETSTANDARD1_4
var privateKey = Ensure.Type <RSA>(key, "RsaKeyManagement alg expects key to be of RSA type.");
return(privateKey.Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
#endif
}
public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
#if NET40
if (key is RSACryptoServiceProvider)
{
//This is for backward compatibility only with 2.x
//To be removed in 3.x
var privateKey = RsaKey.New(((RSACryptoServiceProvider)key).ExportParameters(true));
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
}
if (key is CngKey)
{
var privateKey = (CngKey)key;
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
}
throw new ArgumentException("RsaKeyManagement algorithm expects key to be of CngKey type.");
#elif NET461
if (key is CngKey)
{
var privateKey = (CngKey)key;
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
}
if (key is RSACryptoServiceProvider)
{
//This is for backward compatibility only with 2.x
//To be removed in 3.x
var privateKey = RsaKey.New(((RSACryptoServiceProvider)key).ExportParameters(true));
return(RsaOaep.Decrypt(encryptedCek, privateKey, CngAlgorithm.Sha256));
}
if (key is RSA)
{
var privateKey = (RSA)key;
return(privateKey.Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
}
throw new ArgumentException("RsaKeyManagement algorithm expects key to be of either CngKey or RSA types.");
#elif NETSTANDARD
var privateKey = Ensure.Type <RSA>(key, "RsaKeyManagement algorithm expects key to be of RSA type.");
return(privateKey.Decrypt(encryptedCek, RSAEncryptionPadding.OaepSHA256));
#endif
}
public byte[] Unwrap(byte[] encryptedCek, object key, int cekSizeBits, IDictionary <string, object> header)
{
#if NET40
var privateKey = Ensure.Type <RSACryptoServiceProvider>(key, "RsaKeyManagement alg expects key to be of RSACryptoServiceProvider type.");
return(useSha256 ? RsaOaep.Decrypt(encryptedCek, RsaKey.New(privateKey.ExportParameters(true)), CngAlgorithm.Sha256)
: privateKey.Decrypt(encryptedCek, useRsaOaepPadding));
#elif NETSTANDARD1_4
var privateKey = Ensure.Type <RSA>(key, "RsaKeyManagement alg expects key to be of RSA type.");
var padding = useSha256 ? RSAEncryptionPadding.OaepSHA256 :
useRsaOaepPadding ? RSAEncryptionPadding.OaepSHA1 :
RSAEncryptionPadding.Pkcs1;
return(privateKey.Decrypt(encryptedCek, padding));
#endif
}
