Credentials.cs

#region Copyright notice and license

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// in the documentation and/or other materials provided with the
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#endregion

using System;
using Grpc.Core.Internal;

namespace Grpc.Core
{
    /// <summary>
    /// Client-side credentials. Used for creation of a secure channel.
    /// </summary>
    public abstract class Credentials
    {
        /// <summary>
        /// Creates native object for the credentials.
        /// </summary>
        /// <returns>The native credentials.</returns>
        internal abstract CredentialsSafeHandle ToNativeCredentials();
    }

    /// <summary>
    /// Client-side SSL credentials.
    /// </summary>
    public class SslCredentials : Credentials
    {
        readonly string rootCertificates;
        readonly KeyCertificatePair keyCertificatePair;

        /// <summary>
        /// Creates client-side SSL credentials loaded from
        /// disk file pointed to by the GRPC_DEFAULT_SSL_ROOTS_FILE_PATH environment variable.
        /// If that fails, gets the roots certificates from a well known place on disk.
        /// </summary>
        public SslCredentials() : this(null, null)
        {
        }

        /// <summary>
        /// Creates client-side SSL credentials from
        /// a string containing PEM encoded root certificates.
        /// </summary>
        public SslCredentials(string rootCertificates) : this(rootCertificates, null)
        {
        }
            
        /// <summary>
        /// Creates client-side SSL credentials.
        /// </summary>
        /// <param name="rootCertificates">string containing PEM encoded server root certificates.</param>
        /// <param name="keyCertificatePair">a key certificate pair.</param>
        public SslCredentials(string rootCertificates, KeyCertificatePair keyCertificatePair)
        {
            this.rootCertificates = rootCertificates;
            this.keyCertificatePair = keyCertificatePair;
        }

        /// <summary>
        /// PEM encoding of the server root certificates.
        /// </summary>
        public string RootCertificates
        {
            get
            {
                return this.rootCertificates;
            }
        }

        /// <summary>
        /// Client side key and certificate pair.
        /// If null, client will not use key and certificate pair.
        /// </summary>
        public KeyCertificatePair KeyCertificatePair
        {
            get
            {
                return this.keyCertificatePair;
            }
        }

        internal override CredentialsSafeHandle ToNativeCredentials()
        {
            return CredentialsSafeHandle.CreateSslCredentials(rootCertificates, keyCertificatePair);
        }
    }
}