SNMP Version 3 DES privacy protocol implementation.
DES requires an encryption key be provided of 16 bytes in length. Class will accept longer key values (which will be
trimmed to 16 bytes) but both encrypt and decrypt operations will fail if key is shorter then required value length.
Decryption operation depends on USM header privacyParameters field value which is generated by the Encrypt method. Make
sure privacyParameters argument value is correctly inserted into the target packet to enable SNMP agent to decrypt the
message.
Namespace:
SnmpSharpNetAssembly: SnmpSharpNet (in SnmpSharpNet.dll) Version: 0.5.0.0 (0.5.0.0)
Syntax
| C# | Visual Basic | Visual C++ |
public class PrivacyDES : IPrivacyProtocol
Public Class PrivacyDES _ Implements IPrivacyProtocol
public ref class PrivacyDES : IPrivacyProtocol
Members
| All Members | Constructors  | Properties  | Methods |
 Public Protected | Instance Static  | Declared Inherited | XNA Framework Only  .NET Compact Framework Only  |
| Member | Description | |
|---|---|---|
| PrivacyDES()()() |
Standard constructor.
|
| CanExtendShortKey |
DES implementation does NOT support extending of a short encryption key. Always returns false.
|
| Decrypt(array<Byte>[]()[], Int32, Int32, array<Byte>[]()[], Int32, Int32, array<Byte>[]()[]) |
Decrypt DES encrypted ScopedPdu
|
| Encrypt(array<Byte>[]()[], Int32, Int32, array<Byte>[]()[], Int32, Int32, array<Byte>[]()[]%) |
Encrypt ScopedPdu using DES encryption protocol
|
| Equals(Object) | (Inherited from Object.) |
| ExtendShortKey(array<Byte>[]()[], array<Byte>[]()[], array<Byte>[]()[], IAuthenticationDigest) |
Operation not used by DES. Key length has to be 16 bytes of encryption/decryption operation will fail.
When called, shortKey is returned.
|
| GetEncryptedLength(Int32) |
Get final encrypted length
|
| GetHashCode()()() |
Serves as a hash function for a particular type.
(Inherited from Object.) |
| GetType()()() |
Gets the Type of the current instance.
(Inherited from Object.) |
| MaximumKeyLength |
Return maximum encryption/decryption key length. For DES, returned value is 16
DES protocol itself requires an 8 byte key. Additional 8 bytes are used for generating the
encryption IV. For encryption itself, first 8 bytes of the key are used.
|
| MinimumKeyLength |
Returns minimum encryption/decryption key length. For DES, returned value is 16.
DES protocol itself requires an 8 byte key. Additional 8 bytes are used for generating the
encryption IV. For encryption itself, first 8 bytes of the key are used.
|
| Name |
Privacy protocol name
|
| PasswordToKey(array<Byte>[]()[], array<Byte>[]()[], IAuthenticationDigest) |
Convert privacy password into encryption key using packet authentication hash.
|
| PrivacyParametersLength |
Returns the length of privacyParameters USM header field. For DES, field length is 8.
|
| ToString()()() | (Inherited from Object.) |
