Decrypt() public static method

Des the message using RSA OAEP encryption.
public static Decrypt ( ArraySegment dataToDecrypt, X509Certificate2 encryptingCertificate, bool useOaep, ArraySegment outputBuffer ) : ArraySegment
dataToDecrypt ArraySegment
encryptingCertificate System.Security.Cryptography.X509Certificates.X509Certificate2
useOaep bool
outputBuffer ArraySegment
return ArraySegment
RsaUtils Class Documentation
コード例 #1
0
        /// <summary>
        /// Decrypts the CipherText using the SecurityPolicyUri and returns the PlainTetx.
        /// </summary>
        public static byte[] Decrypt(X509Certificate2 certificate, string securityPolicyUri,
                                     EncryptedData dataToDecrypt)
        {
            // check if nothing to do.
            if (dataToDecrypt == null)
            {
                return(null);
            }

            // nothing more to do if no encryption.
            if (String.IsNullOrEmpty(securityPolicyUri))
            {
                return(dataToDecrypt.Data);
            }

            // decrypt data.
            switch (securityPolicyUri)
            {
            case SecurityPolicies.Basic256:
            case SecurityPolicies.Basic256Sha256: {
                if (dataToDecrypt.Algorithm == SecurityAlgorithms.RsaOaep)
                {
                    return(RsaUtils.Decrypt(new ArraySegment <byte>(dataToDecrypt.Data), certificate, true));
                }

                break;
            }

            case SecurityPolicies.Basic128Rsa15: {
                if (dataToDecrypt.Algorithm == SecurityAlgorithms.Rsa15)
                {
                    return(RsaUtils.Decrypt(new ArraySegment <byte>(dataToDecrypt.Data), certificate, false));
                }

                break;
            }

            case SecurityPolicies.None: {
                if (String.IsNullOrEmpty(dataToDecrypt.Algorithm))
                {
                    return(dataToDecrypt.Data);
                }

                break;
            }

            default: {
                throw ServiceResultException.Create(
                          StatusCodes.BadSecurityPolicyRejected,
                          "Unsupported security policy: {0}",
                          securityPolicyUri);
            }
            }

            throw ServiceResultException.Create(
                      StatusCodes.BadIdentityTokenInvalid,
                      "Unexpected encryption algorithm : {0}",
                      dataToDecrypt.Algorithm);
        }