Amazon.CloudFront.AmazonCloudFrontUrlSigner.ConvertPEMToRSAParameters C# (CSharp) Метод

        internal static RSAParameters ConvertPEMToRSAParameters(TextReader privateKeyReader)
        {
            RSAParameters rsaParams;
            try
            {
                rsaParams = new PemReader(privateKeyReader).ReadPrivatekey();
            }
            catch (Exception e)
            {
                throw new AmazonClientException("Invalid RSA Private Key", e);
            }

            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.ImportParameters(rsaParams);
            return rsaParams;
        }

        /// <summary>
        /// Returns signed cookies that provides tailored access to private content based on an access time window and an ip range.
        /// </summary>
        /// <param name="resourceUrlOrPath">
        /// The URL or path for resource within a distribution.
        /// </param>
        /// <param name="privateKey">Your private key file. RSA private key (.pem) are supported.</param>
        /// <param name="keyPairId">The key pair id corresponding to the private key file given.</param>
        /// <param name="expiresOn">The expiration date till which content can be accessed using the generated cookies.</param>
        /// <param name="activeFrom">The date from which content can be accessed using the generated cookies.</param>
        /// <param name="ipRange">The allowed IP address range of the client making the GET request, in CIDR form (e.g. 192.168.0.1/24).</param>
        /// <returns>The signed cookies.</returns>
        public static CookiesForCustomPolicy GetCookiesForCustomPolicy(string resourceUrlOrPath,
                                                                       TextReader privateKey,
                                                                       string keyPairId,
                                                                       DateTime expiresOn,
                                                                       DateTime activeFrom,
                                                                       string ipRange)
        {
            var cookies = new CookiesForCustomPolicy();
            var policy  = AmazonCloudFrontUrlSigner.BuildPolicyForSignedUrl(resourceUrlOrPath, expiresOn,
                                                                            ipRange, activeFrom);

            var base64EncodedPolicy = AmazonCloudFrontUrlSigner.MakeStringUrlSafe(policy);

            cookies.Policy = new KeyValuePair <string, string>(PolicyKey, base64EncodedPolicy);

            RSAParameters rsaParameters = AmazonCloudFrontUrlSigner.ConvertPEMToRSAParameters(privateKey);

            byte[] signatureBytes = AmazonCloudFrontUrlSigner.SignWithSha1RSA(
                UTF8Encoding.UTF8.GetBytes(policy), rsaParameters);
            string urlSafeSignature = AmazonCloudFrontUrlSigner.MakeBytesUrlSafe(signatureBytes);

            cookies.Signature = new KeyValuePair <string, string>(SignatureKey, urlSafeSignature);

            cookies.KeyPairId = new KeyValuePair <string, string>(KeyPairIdKey, keyPairId);

            return(cookies);
        }