/// <summary>
/// When finished with a <see cref="SignatureProvider"/> call this method for cleanup. The default behavior is to call <see cref="SignatureProvider.Dispose(bool)"/>
/// </summary>
/// <param name="signatureProvider"><see cref="SignatureProvider"/> to be released.</param>
public virtual void ReleaseProvider(SignatureProvider signatureProvider)
{
if (signatureProvider != null)
{
signatureProvider.Dispose();
}
}
/// <summary>
/// When finished with a <see cref="SignatureProvider"/> call this method for cleanup. The default behavior is to call <see cref="SignatureProvider.Dispose(bool)"/>
/// </summary>
/// <param name="signatureProvider"><see cref="SignatureProvider"/> to be released.</param>
public virtual void ReleaseProvider(SignatureProvider signatureProvider)
{
if (signatureProvider != null)
{
signatureProvider.Dispose();
}
}
/// <summary>
/// Produces a signature over the 'input' using the <see cref="SecurityKey"/> and algorithm specified.
/// </summary>
/// <param name="inputString">string to be signed</param>
/// <param name="key">the <see cref="SecurityKey"/> to use.</param>
/// <param name="algorithm">the algorithm to use.</param>
/// <param name="signatureProvider">if provided, the <see cref="SignatureProvider"/> will be used to sign the token</param>
/// <returns>The signature over the bytes obtained from UTF8Encoding.GetBytes( 'input' ).</returns>
/// <remarks>The <see cref="SignatureProvider"/> used to created the signature is obtained by calling <see cref="System.IdentityModel.Tokens.SignatureProviderFactory.CreateForSigning(SecurityKey, string)"/>.</remarks>
/// <exception cref="ArgumentNullException">'input' is null.</exception>
/// <exception cref="InvalidProgramException"><see cref="System.IdentityModel.Tokens.SignatureProviderFactory.CreateForSigning(SecurityKey, string)"/> returns null.</exception>
internal byte[] CreateSignature(string inputString, SecurityKey key, string algorithm, SignatureProvider signatureProvider = null)
{
if (null == inputString)
{
throw new ArgumentNullException("inputString");
}
SignatureProvider provider;
if (signatureProvider != null)
{
return signatureProvider.Sign(Encoding.UTF8.GetBytes(inputString));
}
else
{
provider = SignatureProviderFactory.CreateForSigning(key, algorithm);
if (provider == null)
{
throw new InvalidProgramException(string.Format(CultureInfo.InvariantCulture, ErrorMessages.IDX10635, SignatureProviderFactory.GetType(), typeof(SignatureProvider), key == null ? "<null>" : key.GetType().ToString(), algorithm == null ? "<null>" : algorithm));
}
byte[] bytes = provider.Sign(Encoding.UTF8.GetBytes(inputString));
SignatureProviderFactory.ReleaseProvider(provider);
return bytes;
}
}
/// <summary>
/// Uses the <see cref="JwtSecurityToken(JwtHeader, JwtPayload, string, string, string)"/> constructor, first creating the <see cref="JwtHeader"/> and <see cref="JwtPayload"/>.
/// <para>If <see cref="SigningCredentials"/> is not null, <see cref="JwtSecurityToken.RawData"/> will be signed.</para>
/// </summary>
/// <param name="issuer">the issuer of the token.</param>
/// <param name="audience">the audience for this token.</param>
/// <param name="subject">the source of the <see cref="Claim"/>(s) for this token.</param>
/// <param name="notBefore">the notbefore time for this token.</param>
/// <param name="expires">the expiration time for this token.</param>
/// <param name="signingCredentials">contains cryptographic material for generating a signature.</param>
/// <param name="signatureProvider">optional <see cref="SignatureProvider"/>.</param>
/// <remarks>If <see cref="ClaimsIdentity.Actor"/> is not null, then a claim { actort, 'value' } will be added to the payload. <see cref="CreateActorValue"/> for details on how the value is created.
/// <para>See <seealso cref="JwtHeader"/> for details on how the HeaderParameters are added to the header.</para>
/// <para>See <seealso cref="JwtPayload"/> for details on how the values are added to the payload.</para></remarks>
/// <para>If signautureProvider is not null, then it will be used to create the signature and <see cref="System.IdentityModel.Tokens.SignatureProviderFactory.CreateForSigning( SecurityKey, string )"/> will not be called.</para>
/// <returns>A <see cref="JwtSecurityToken"/>.</returns>
/// <exception cref="ArgumentException">if 'expires' <= 'notBefore'.</exception>
public virtual JwtSecurityToken CreateToken(string issuer = null, string audience = null, ClaimsIdentity subject = null, DateTime? notBefore = null, DateTime? expires = null, SigningCredentials signingCredentials = null, SignatureProvider signatureProvider = null)
{
if (expires.HasValue && notBefore.HasValue)
{
if (notBefore >= expires)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, ErrorMessages.IDX10401, expires.Value, notBefore.Value));
}
}
// if not set, use defaults
if (!expires.HasValue && !notBefore.HasValue)
{
DateTime now = DateTime.UtcNow;
expires = now + TimeSpan.FromMinutes(TokenLifetimeInMinutes);
notBefore = now;
}
JwtPayload payload = new JwtPayload(issuer, audience, subject == null ? null : subject.Claims, notBefore, expires);
JwtHeader header = new JwtHeader(signingCredentials);
if (subject != null && subject.Actor != null)
{
payload.AddClaim(new Claim(JwtRegisteredClaimNames.Actort, this.CreateActorValue(subject.Actor)));
}
string rawHeader = header.Base64UrlEncode();
string rawPayload = payload.Base64UrlEncode();
string rawSignature = string.Empty;
string signingInput = string.Concat(rawHeader, ".", rawPayload);
if (signatureProvider != null)
{
rawSignature = Base64UrlEncoder.Encode(this.CreateSignature(signingInput, null, null, signatureProvider));
}
else if (signingCredentials != null)
{
rawSignature = Base64UrlEncoder.Encode(this.CreateSignature(signingInput, signingCredentials.SigningKey, signingCredentials.SignatureAlgorithm, signatureProvider));
}
return new JwtSecurityToken(header, payload, rawHeader, rawPayload, rawSignature);
}
private void SignatureProvider_SignVariation(SignatureProvider provider, byte[] bytes, byte[] signature, ExpectedException expectedException)
{
try
{
provider.Sign(bytes);
expectedException.ProcessNoException();
}
catch (Exception ex)
{
expectedException.ProcessException(ex);
}
}
private void CreateJwts( SecurityTokenDescriptor tokenDescriptor, SignatureProvider signatureProvider )
{
JwtSecurityTokenHandler tokenHandler = new JwtSecurityTokenHandler();
tokenHandler.CreateToken( issuer: tokenDescriptor.TokenIssuerName,
audience: tokenDescriptor.AppliesToAddress,
subject: tokenDescriptor.Subject,
signingCredentials: tokenDescriptor.SigningCredentials,
signatureProvider: signatureProvider );
}
private void WriteJwts( SecurityTokenDescriptor tokenDescriptor, SignatureProvider signatureProvider )
{
JwtSecurityTokenHandler tokenHandler = new JwtSecurityTokenHandler();
JwtSecurityToken jwt = new JwtSecurityToken( tokenDescriptor.TokenIssuerName, tokenDescriptor.AppliesToAddress, tokenDescriptor.Subject.Claims, tokenDescriptor.Lifetime, tokenDescriptor.SigningCredentials );
MemoryStream ms = new MemoryStream();
XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter( ms );
tokenHandler.WriteToken( writer, jwt );
}
