Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / infocard / Client / System / IdentityModel / Selectors / InfoCardAsymmetricCrypto.cs / 1305376 / InfoCardAsymmetricCrypto.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace System.IdentityModel.Selectors { using System; using System.Security.Cryptography; using System.Security.Cryptography.Xml; using System.IdentityModel.Tokens; using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace; // // For common & resources // using Microsoft.InfoCards; // // Summary: // This class implements the IAsymmetricCrypto interface and is used as an adapter between the // InfoCard system and Indigo. // internal class InfoCardAsymmetricCrypto : AsymmetricSecurityKey, IDisposable { InfoCardRSACryptoProvider m_rsa; // // Summary: // Constructs a new InfoCardAsymmetricCrypto given an InfoCardRSACryptoProvider. // // Parameters: // cryptoHandle - the handle to the asymmetric key to base this crypto object on. public InfoCardAsymmetricCrypto( AsymmetricCryptoHandle cryptoHandle ) { m_rsa = new InfoCardRSACryptoProvider( cryptoHandle ); } // // Summary: // Returns the size of the asymmetric key // public override int KeySize { get { return m_rsa.KeySize; } } // // Summary: // Indicates whether this IAsymmetricCrypto has access to the private key. // In our case, that's the whole point, so it always returns true. // public override bool HasPrivateKey() { return true; } // // Summary: // Returns a reference to the InfoCardRSACryptoProvider that give Indigo access to // the private key associated with the infocard, recipient tuple. // // Parameters: // algorithmUri - The URI of the algorithm being requested. // privateKey - set to true if access to the private key is required. // public override AsymmetricAlgorithm GetAsymmetricAlgorithm( string algorithmUri, bool privateKey ) { switch( algorithmUri ) { case SignedXml.XmlDsigRSASHA1Url: case EncryptedXml.XmlEncRSA15Url: case EncryptedXml.XmlEncRSAOAEPUrl: return m_rsa; default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } // // Sumamry: // Returns a HashAlgorithm // // Parameters: // algorithmUri - the uri of the hash algorithm being requested. // public override HashAlgorithm GetHashAlgorithmForSignature( string algorithmUri ) { switch (algorithmUri) { case SignedXml.XmlDsigRSASHA1Url: return new SHA1Managed(); default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } // // Summary: // Returns a Signature deformatter. // // Parameters: // algorithmUri - the uri of signature deformatter being requeted. // public override AsymmetricSignatureDeformatter GetSignatureDeformatter( string algorithmUri ) { switch( algorithmUri) { case SignedXml.XmlDsigRSASHA1Url: return new InfoCardRSAPKCS1SignatureDeformatter( m_rsa ); default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } // // Summary: // Returns a Signature formatter. // // Parameters: // algorithmUri - the uri of signature formatter being requeted. // public override AsymmetricSignatureFormatter GetSignatureFormatter( string algorithmUri ) { switch( algorithmUri) { case SignedXml.XmlDsigRSASHA1Url: return new InfoCardRSAPKCS1SignatureFormatter( m_rsa ); default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } // // Summary: // Decrypts a symmetric key using the private key of a public/private key pair. // // Parameters: // algorithmUri - The algorithm to use to decrypt the key. // keyData - the key to decrypt. // public override byte[] DecryptKey( string algorithmUri, byte[] keyData ) { AsymmetricKeyExchangeDeformatter deformatter; switch (algorithmUri) { case EncryptedXml.XmlEncRSA15Url: deformatter = new InfoCardRSAPKCS1KeyExchangeDeformatter( m_rsa ); return deformatter.DecryptKeyExchange( keyData ); case EncryptedXml.XmlEncRSAOAEPUrl: deformatter = new InfoCardRSAOAEPKeyExchangeDeformatter( m_rsa ); return deformatter.DecryptKeyExchange( keyData ); default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } // // Summary: // Encrypts a symmetric key using the public key of a public/private key pair. // // Parameters: // algorithmUri - The algorithm to use to encrypt the key. // keyData - the key to encrypt. // public override byte[] EncryptKey( string algorithmUri, byte[] keyData ) { AsymmetricKeyExchangeFormatter formatter; switch (algorithmUri) { case EncryptedXml.XmlEncRSA15Url: formatter = new InfoCardRSAPKCS1KeyExchangeFormatter( m_rsa ); return formatter.CreateKeyExchange( keyData ); case EncryptedXml.XmlEncRSAOAEPUrl: formatter = new InfoCardRSAOAEPKeyExchangeFormatter( m_rsa ); return formatter.CreateKeyExchange( keyData ); default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } public override bool IsSupportedAlgorithm( string algorithmUri ) { switch (algorithmUri) { case SignedXml.XmlDsigRSASHA1Url: case EncryptedXml.XmlEncRSA15Url: case EncryptedXml.XmlEncRSAOAEPUrl: return true; default: return false; } } public override bool IsSymmetricAlgorithm( string algorithmUri ) { return InfoCardCryptoHelper.IsSymmetricAlgorithm(algorithmUri); } public override bool IsAsymmetricAlgorithm( string algorithmUri ) { return InfoCardCryptoHelper.IsAsymmetricAlgorithm(algorithmUri); } public void Dispose() { ((IDisposable)m_rsa).Dispose(); m_rsa = null; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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