[C#]
    void Decrypt(int Algorithm, int Mode, TElCustomCryptoKey Key, byte[] InBuffer, int InStartIndex, int InSize, ref byte[] OutBuffer, int OutStartIndex, ref int OutSize, TElCPParameters Params, TSBProgressFunc ProgressFunc, Object ProgressData);
    void Decrypt(byte[] AlgOID, byte[] AlgParams, int Mode, TElCustomCryptoKey Key, byte[] InBuffer, int InStartIndex, int InSize, ref byte[] OutBuffer, int OutStartIndex, ref int OutSize, TElCPParameters Params, TSBProgressFunc ProgressFunc, Object ProgressData);

[VB.NET]
    Sub Decrypt(ByVal Algorithm As Integer, ByVal Mode As Integer, ByVal Key As TElCustomCryptoKey, ByVal InBuffer As Byte(), ByVal InStartIndex As Integer, ByVal InSize As Integer, ByRef OutBuffer As Byte(), ByVal OutStartIndex As Integer, ByRef OutSize As Integer, ByVal Params As TElCPParameters, ByVal ProgressFunc As TSBProgressFunc, ByVal ProgressData As Object)
    Sub Decrypt(ByVal AlgOID As Byte(), ByVal AlgParams As Byte(), ByVal Mode As Integer, ByVal Key As TElCustomCryptoKey, ByVal InBuffer As Byte(), ByVal InStartIndex As Integer, ByVal InSize As Integer, ByRef OutBuffer As Byte(), ByVal OutStartIndex As Integer, ByRef OutSize As Integer, ByVal Params As TElCPParameters, ByVal ProgressFunc As TSBProgressFunc, ByVal ProgressData As Object)

[Pascal]
    procedure Decrypt(Algorithm : integer; Mode : integer; Key : TElCustomCryptoKey; InBuffer : pointer; InSize : integer; OutBuffer : pointer; var OutSize : integer; Params : TElRelativeDistinguishedName = nil; ProgressFunc : TSBProgressFunc = nil; ProgressData : pointer = nil); overload; virtual;
    procedure Decrypt(const AlgOID, AlgParams : ByteArray; Mode : integer; Key : TElCustomCryptoKey; InBuffer : pointer; InSize : integer; OutBuffer : pointer; var OutSize : integer; Params : TElRelativeDistinguishedName = nil; ProgressFunc : TSBProgressFunc = nil; ProgressData : pointer = nil); overload; virtual;

[C++]
    void Decrypt(int32_t Algorithm, int32_t Mode, TElCustomCryptoKey &Key, void * InBuffer, int32_t InSize, void * OutBuffer, int32_t &OutSize, TElRelativeDistinguishedName &Params, TSBProgressFunc pMethodProgressFunc, void * pDataProgressFunc, void * ProgressData);
    void Decrypt(int32_t Algorithm, int32_t Mode, TElCustomCryptoKey *Key, void * InBuffer, int32_t InSize, void * OutBuffer, int32_t &OutSize, TElRelativeDistinguishedName *Params, TSBProgressFunc pMethodProgressFunc, void * pDataProgressFunc, void * ProgressData);
    void Decrypt(const std::vector<uint8_t> &AlgOID, const std::vector<uint8_t> &AlgParams, int32_t Mode, TElCustomCryptoKey &Key, void * InBuffer, int32_t InSize, void * OutBuffer, int32_t &OutSize, TElRelativeDistinguishedName &Params, TSBProgressFunc pMethodProgressFunc, void * pDataProgressFunc, void * ProgressData);
    void Decrypt(const std::vector<uint8_t> &AlgOID, const std::vector<uint8_t> &AlgParams, int32_t Mode, TElCustomCryptoKey *Key, void * InBuffer, int32_t InSize, void * OutBuffer, int32_t &OutSize, TElRelativeDistinguishedName *Params, TSBProgressFunc pMethodProgressFunc, void * pDataProgressFunc, void * ProgressData);

[PHP]
    void Decrypt(integer $Algorithm, integer $Mode, TElCustomCryptoKey $Key, TSBPointer|array of byte|string|NULL $InBuffer, integer $InSize, TSBPointer|array of byte|string|NULL $OutBuffer, integer &$OutSize, TElRelativeDistinguishedName $Params, TSBProgressFunc|callable|NULL $ProgressFunc, TSBPointer|array of byte|string|NULL $ProgressData)
    void Decrypt(array of byte|string|NULL $AlgOID, array of byte|string|NULL $AlgParams, integer $Mode, TElCustomCryptoKey $Key, TSBPointer|array of byte|string|NULL $InBuffer, integer $InSize, TSBPointer|array of byte|string|NULL $OutBuffer, integer &$OutSize, TElRelativeDistinguishedName $Params, TSBProgressFunc|callable|NULL $ProgressFunc, TSBPointer|array of byte|string|NULL $ProgressData)

[Java]
    void decrypt(int Algorithm, int Mode, TElCustomCryptoKey Key, byte[] InBuffer, int InStartIndex, int InSize, byte[][] OutBuffer, int OutStartIndex, int[] OutSize, TElCPParameters Params, TSBProgressFunc ProgressData, TObject arg11);
    void decrypt(byte[] AlgOID, byte[] AlgParams, int Mode, TElCustomCryptoKey Key, byte[] InBuffer, int InStartIndex, int InSize, byte[][] OutBuffer, int OutStartIndex, int[] OutSize, TElCPParameters Params, TSBProgressFunc ProgressData, TObject arg12);