Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / clr / src / BCL / System / Security / Cryptography / RSAPKCS1SignatureDeformatter.cs / 1 / RSAPKCS1SignatureDeformatter.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // RSAPKCS1SignatureDeformatter.cs // namespace System.Security.Cryptography { [System.Runtime.InteropServices.ComVisible(true)] public class RSAPKCS1SignatureDeformatter : AsymmetricSignatureDeformatter { // // This class provides the PKCS#1 v1.5 signature format processing during // the verification process (i.e. decrypting the object). The class has // some special code for dealing with the CSP based RSA keys as the // formatting and verification is done within the CSP rather than in // managed code. // private RSA _rsaKey; // RSA Key value to do decrypt operation private String _strOID; // OID value for the HASH algorithm // // public constructors // public RSAPKCS1SignatureDeformatter() {} public RSAPKCS1SignatureDeformatter(AsymmetricAlgorithm key) { if (key == null) throw new ArgumentNullException("key"); _rsaKey = (RSA) key; } // // public methods // public override void SetKey(AsymmetricAlgorithm key) { if (key == null) throw new ArgumentNullException("key"); _rsaKey = (RSA) key; } public override void SetHashAlgorithm(String strName) { _strOID = CryptoConfig.MapNameToOID(strName); } public override bool VerifySignature(byte[] rgbHash, byte[] rgbSignature) { if (_strOID == null) throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_MissingOID")); if (_rsaKey == null) throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_MissingKey")); if (rgbHash == null) throw new ArgumentNullException("rgbHash"); if (rgbSignature == null) throw new ArgumentNullException("rgbSignature"); // Two cases here -- if we are talking to the CSP version or if we are talking to some other RSA provider. if (_rsaKey is RSACryptoServiceProvider) { return ((RSACryptoServiceProvider) _rsaKey).VerifyHash(rgbHash, _strOID, rgbSignature); } else { byte[] pad = Utils.RsaPkcs1Padding(_rsaKey, CryptoConfig.EncodeOID(_strOID), rgbHash); // Apply the public key to the signature data to get back the padded buffer actually signed. // Compare the two buffers to see if they match; ignoring any leading zeros return Utils.CompareBigIntArrays(_rsaKey.EncryptValue(rgbSignature), pad); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // RSAPKCS1SignatureDeformatter.cs // namespace System.Security.Cryptography { [System.Runtime.InteropServices.ComVisible(true)] public class RSAPKCS1SignatureDeformatter : AsymmetricSignatureDeformatter { // // This class provides the PKCS#1 v1.5 signature format processing during // the verification process (i.e. decrypting the object). The class has // some special code for dealing with the CSP based RSA keys as the // formatting and verification is done within the CSP rather than in // managed code. // private RSA _rsaKey; // RSA Key value to do decrypt operation private String _strOID; // OID value for the HASH algorithm // // public constructors // public RSAPKCS1SignatureDeformatter() {} public RSAPKCS1SignatureDeformatter(AsymmetricAlgorithm key) { if (key == null) throw new ArgumentNullException("key"); _rsaKey = (RSA) key; } // // public methods // public override void SetKey(AsymmetricAlgorithm key) { if (key == null) throw new ArgumentNullException("key"); _rsaKey = (RSA) key; } public override void SetHashAlgorithm(String strName) { _strOID = CryptoConfig.MapNameToOID(strName); } public override bool VerifySignature(byte[] rgbHash, byte[] rgbSignature) { if (_strOID == null) throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_MissingOID")); if (_rsaKey == null) throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_MissingKey")); if (rgbHash == null) throw new ArgumentNullException("rgbHash"); if (rgbSignature == null) throw new ArgumentNullException("rgbSignature"); // Two cases here -- if we are talking to the CSP version or if we are talking to some other RSA provider. if (_rsaKey is RSACryptoServiceProvider) { return ((RSACryptoServiceProvider) _rsaKey).VerifyHash(rgbHash, _strOID, rgbSignature); } else { byte[] pad = Utils.RsaPkcs1Padding(_rsaKey, CryptoConfig.EncodeOID(_strOID), rgbHash); // Apply the public key to the signature data to get back the padded buffer actually signed. // Compare the two buffers to see if they match; ignoring any leading zeros return Utils.CompareBigIntArrays(_rsaKey.EncryptValue(rgbSignature), pad); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SettingsProperty.cs
- ObjectItemCollection.cs
- ArgumentDesigner.xaml.cs
- BitmapEffectDrawingContextState.cs
- FormatConvertedBitmap.cs
- UnsafeNativeMethods.cs
- CachedCompositeFamily.cs
- TransactionContextManager.cs
- CodeCommentStatementCollection.cs
- PropertyEntry.cs
- ServiceChannel.cs
- ObjectComplexPropertyMapping.cs
- MenuItem.cs
- Point3D.cs
- _Events.cs
- SystemInfo.cs
- GenericsNotImplementedException.cs
- EntityReference.cs
- path.cs
- JpegBitmapEncoder.cs
- PreviewPageInfo.cs
- FamilyMapCollection.cs
- HiddenFieldPageStatePersister.cs
- TemplateParser.cs
- SetIndexBinder.cs
- ActionFrame.cs
- AccessText.cs
- ExceptionHelpers.cs
- RefType.cs
- DataGridViewRowConverter.cs
- DeviceFilterEditorDialog.cs
- DbTypeMap.cs
- RequestCache.cs
- StoreContentChangedEventArgs.cs
- VectorCollection.cs
- PointAnimationBase.cs
- RowToFieldTransformer.cs
- FixedTextView.cs
- XmlSchemaRedefine.cs
- documentsequencetextcontainer.cs
- ModelFunction.cs
- HttpDigestClientCredential.cs
- BrowserDefinitionCollection.cs
- InputReferenceExpression.cs
- SQLBytesStorage.cs
- CorrelationTokenTypeConvertor.cs
- CodeMemberEvent.cs
- ScrollableControl.cs
- TextRunCache.cs
- BadImageFormatException.cs
- LocatorPartList.cs
- DecoderFallback.cs
- StringFormat.cs
- PassportAuthenticationModule.cs
- TextHidden.cs
- GPRECT.cs
- DesignerActionPropertyItem.cs
- PrintPreviewDialog.cs
- CodeSubDirectoriesCollection.cs
- SubMenuStyle.cs
- HtmlShim.cs
- FileLevelControlBuilderAttribute.cs
- LZCodec.cs
- FormParameter.cs
- InterleavedZipPartStream.cs
- HtmlContainerControl.cs
- Odbc32.cs
- InvalidWMPVersionException.cs
- TrustManagerPromptUI.cs
- AgileSafeNativeMemoryHandle.cs
- CustomError.cs
- MemoryStream.cs
- DLinqDataModelProvider.cs
- FixedTextSelectionProcessor.cs
- ResourceCategoryAttribute.cs
- DefinitionBase.cs
- HuffCodec.cs
- Selection.cs
- VisualBrush.cs
- DictionaryTraceRecord.cs
- CircleHotSpot.cs
- EmptyElement.cs
- DataGridViewCellCancelEventArgs.cs
- SqlDataSourceFilteringEventArgs.cs
- PrePrepareMethodAttribute.cs
- DirectionalLight.cs
- ResourcesBuildProvider.cs
- BoolExpr.cs
- AutomationIdentifierGuids.cs
- Int16Animation.cs
- SerializationObjectManager.cs
- MarshalDirectiveException.cs
- TextParagraphView.cs
- remotingproxy.cs
- ResXResourceWriter.cs
- StringUtil.cs
- SrgsRulesCollection.cs
- Recipient.cs
- ChannelSinkStacks.cs
- Receive.cs