SslDecryptPacket function

Artikel
01/07/2021

the SslDecryptPacket function decrypts a single Secure Sockets Layer protocol (SSL) packet.

Syntax

SECURITY_STATUS WINAPI SslDecryptPacket(
  _In_    NCRYPT_PROV_HANDLE hSslProvider,
  _Inout_ NCRYPT_KEY_HANDLE  hKey,
  _In_    PBYTE              *pbInput,
  _In_    DWORD              cbInput,
  _Out_   PBYTE              pbOutput,
  _In_    DWORD              cbOutput,
  _Out_   DWORD              *pcbResult,
  _In_    ULONGLONG          SequenceNumber,
  _In_    DWORD              dwFlags
);

Parameters

hSslProvider [in]: The handle of the SSL protocol provider instance.
hKey [in, out]: The handle to the key that is used to decrypt the packet.
pbInput [in]: A pointer to the buffer that contains the packet to be decrypted.
cbInput [in]: The length, in bytes, of the pbInput buffer.
pbOutput [out]: A pointer to a buffer to contain the decrypted packet.
cbOutput [in]: The length, bytes, of the pbOutput buffer.
pcbResult [out]: The number of bytes written to the pbOutput buffer.
SequenceNumber [in]: The sequence number that corresponds to this packet.
dwFlags [in]: This parameter is reserved for future use.

Return value

If the function succeeds, it returns zero.

If the function fails, it returns a nonzero error value.

Possible return codes include, but are not limited to, the following.

Return code/value	Description
NTE_INVALID_HANDLE 0x80090026L	One of the provided handles is not valid.

Remarks

The length of the packet can be zero, such as when a "HelloRequest" message is decrypted.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	Sslprovider.h
DLL	Ncrypt.dll

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