RC2.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Cryptography / RC2.cs / 1305376 / RC2.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// RC2.cs 
//

namespace System.Security.Cryptography {
[System.Runtime.InteropServices.ComVisible(true)] 
    public abstract class RC2 : SymmetricAlgorithm
    { 
        protected int               EffectiveKeySizeValue; 
        private static  KeySizes[] s_legalBlockSizes = {
          new KeySizes(64, 64, 0) 
        };
        private static  KeySizes[] s_legalKeySizes = {
            new KeySizes(40, 1024, 8)  // 1024 bits is theoretical max according to the RFC
        }; 

        // 
        // protected constructors 
        //
 
        protected RC2() {
            KeySizeValue = 128;
            BlockSizeValue = 64;
            FeedbackSizeValue = BlockSizeValue; 
            LegalBlockSizesValue = s_legalBlockSizes;
            LegalKeySizesValue = s_legalKeySizes; 
        } 

        // 
        // public properties
        //

        public virtual int EffectiveKeySize { 
            get {
                if (EffectiveKeySizeValue == 0) return KeySizeValue; 
                return EffectiveKeySizeValue; 
            }
            set { 
                if (value > KeySizeValue) {
                    throw new CryptographicException(Environment.GetResourceString("Cryptography_RC2_EKSKS"));
                } else if (value == 0) {
                    EffectiveKeySizeValue = value; 
                } else if (value < 40) {
                    throw new CryptographicException(Environment.GetResourceString("Cryptography_RC2_EKS40")); 
                } else { 
                    if (ValidKeySize(value))
                        EffectiveKeySizeValue = value; 
                    else
                        throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
                }
            } 
        }
 
        public override int KeySize { 
            get { return KeySizeValue; }
            set { 
                if (value < EffectiveKeySizeValue) throw new CryptographicException(Environment.GetResourceString("Cryptography_RC2_EKSKS"));
                base.KeySize = value;
            }
        } 

        // 
        // public methods 
        //
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        new static public RC2 Create() {
            return Create("System.Security.Cryptography.RC2");
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        new static public RC2 Create(String AlgName) { 
            return (RC2) CryptoConfig.CreateFromName(AlgName);
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// RC2.cs 
//

namespace System.Security.Cryptography {
[System.Runtime.InteropServices.ComVisible(true)] 
    public abstract class RC2 : SymmetricAlgorithm
    { 
        protected int               EffectiveKeySizeValue; 
        private static  KeySizes[] s_legalBlockSizes = {
          new KeySizes(64, 64, 0) 
        };
        private static  KeySizes[] s_legalKeySizes = {
            new KeySizes(40, 1024, 8)  // 1024 bits is theoretical max according to the RFC
        }; 

        // 
        // protected constructors 
        //
 
        protected RC2() {
            KeySizeValue = 128;
            BlockSizeValue = 64;
            FeedbackSizeValue = BlockSizeValue; 
            LegalBlockSizesValue = s_legalBlockSizes;
            LegalKeySizesValue = s_legalKeySizes; 
        } 

        // 
        // public properties
        //

        public virtual int EffectiveKeySize { 
            get {
                if (EffectiveKeySizeValue == 0) return KeySizeValue; 
                return EffectiveKeySizeValue; 
            }
            set { 
                if (value > KeySizeValue) {
                    throw new CryptographicException(Environment.GetResourceString("Cryptography_RC2_EKSKS"));
                } else if (value == 0) {
                    EffectiveKeySizeValue = value; 
                } else if (value < 40) {
                    throw new CryptographicException(Environment.GetResourceString("Cryptography_RC2_EKS40")); 
                } else { 
                    if (ValidKeySize(value))
                        EffectiveKeySizeValue = value; 
                    else
                        throw new CryptographicException(Environment.GetResourceString("Cryptography_InvalidKeySize"));
                }
            } 
        }
 
        public override int KeySize { 
            get { return KeySizeValue; }
            set { 
                if (value < EffectiveKeySizeValue) throw new CryptographicException(Environment.GetResourceString("Cryptography_RC2_EKSKS"));
                base.KeySize = value;
            }
        } 

        // 
        // public methods 
        //
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        new static public RC2 Create() {
            return Create("System.Security.Cryptography.RC2");
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        new static public RC2 Create(String AlgName) { 
            return (RC2) CryptoConfig.CreateFromName(AlgName);
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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