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CryptEncryptMessage

関数

受信者証明書を用いてデータを暗号化メッセージに変換する。

DLLCRYPT32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// CRYPT32.dll
#include <windows.h>

BOOL CryptEncryptMessage(
    CRYPT_ENCRYPT_MESSAGE_PARA* pEncryptPara,
    DWORD cRecipientCert,
    CERT_CONTEXT** rgpRecipientCert,
    const BYTE* pbToBeEncrypted,   // optional
    DWORD cbToBeEncrypted,
    BYTE* pbEncryptedBlob,   // optional
    DWORD* pcbEncryptedBlob
);

パラメーター

名前	型	方向
pEncryptPara	CRYPT_ENCRYPT_MESSAGE_PARA*	in
cRecipientCert	DWORD	in
rgpRecipientCert	CERT_CONTEXT**	in
pbToBeEncrypted	BYTE*	inoptional
cbToBeEncrypted	DWORD	in
pbEncryptedBlob	BYTE*	outoptional
pcbEncryptedBlob	DWORD*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// CRYPT32.dll
#include <windows.h>

BOOL CryptEncryptMessage(
    CRYPT_ENCRYPT_MESSAGE_PARA* pEncryptPara,
    DWORD cRecipientCert,
    CERT_CONTEXT** rgpRecipientCert,
    const BYTE* pbToBeEncrypted,   // optional
    DWORD cbToBeEncrypted,
    BYTE* pbEncryptedBlob,   // optional
    DWORD* pcbEncryptedBlob
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool CryptEncryptMessage(
    IntPtr pEncryptPara,   // CRYPT_ENCRYPT_MESSAGE_PARA*
    uint cRecipientCert,   // DWORD
    IntPtr rgpRecipientCert,   // CERT_CONTEXT**
    IntPtr pbToBeEncrypted,   // BYTE* optional
    uint cbToBeEncrypted,   // DWORD
    IntPtr pbEncryptedBlob,   // BYTE* optional, out
    ref uint pcbEncryptedBlob   // DWORD* in/out
);

<DllImport("CRYPT32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CryptEncryptMessage(
    pEncryptPara As IntPtr,   ' CRYPT_ENCRYPT_MESSAGE_PARA*
    cRecipientCert As UInteger,   ' DWORD
    rgpRecipientCert As IntPtr,   ' CERT_CONTEXT**
    pbToBeEncrypted As IntPtr,   ' BYTE* optional
    cbToBeEncrypted As UInteger,   ' DWORD
    pbEncryptedBlob As IntPtr,   ' BYTE* optional, out
    ByRef pcbEncryptedBlob As UInteger   ' DWORD* in/out
) As Boolean
End Function

' pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA*
' cRecipientCert : DWORD
' rgpRecipientCert : CERT_CONTEXT**
' pbToBeEncrypted : BYTE* optional
' cbToBeEncrypted : DWORD
' pbEncryptedBlob : BYTE* optional, out
' pcbEncryptedBlob : DWORD* in/out
Declare PtrSafe Function CryptEncryptMessage Lib "crypt32" ( _
    ByVal pEncryptPara As LongPtr, _
    ByVal cRecipientCert As Long, _
    ByVal rgpRecipientCert As LongPtr, _
    ByVal pbToBeEncrypted As LongPtr, _
    ByVal cbToBeEncrypted As Long, _
    ByVal pbEncryptedBlob As LongPtr, _
    ByRef pcbEncryptedBlob As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CryptEncryptMessage = ctypes.windll.crypt32.CryptEncryptMessage
CryptEncryptMessage.restype = wintypes.BOOL
CryptEncryptMessage.argtypes = [
    ctypes.c_void_p,  # pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA*
    wintypes.DWORD,  # cRecipientCert : DWORD
    ctypes.c_void_p,  # rgpRecipientCert : CERT_CONTEXT**
    ctypes.POINTER(ctypes.c_ubyte),  # pbToBeEncrypted : BYTE* optional
    wintypes.DWORD,  # cbToBeEncrypted : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pbEncryptedBlob : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcbEncryptedBlob : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CryptEncryptMessage = Fiddle::Function.new(
  lib['CryptEncryptMessage'],
  [
    Fiddle::TYPE_VOIDP,  # pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA*
    -Fiddle::TYPE_INT,  # cRecipientCert : DWORD
    Fiddle::TYPE_VOIDP,  # rgpRecipientCert : CERT_CONTEXT**
    Fiddle::TYPE_VOIDP,  # pbToBeEncrypted : BYTE* optional
    -Fiddle::TYPE_INT,  # cbToBeEncrypted : DWORD
    Fiddle::TYPE_VOIDP,  # pbEncryptedBlob : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # pcbEncryptedBlob : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "crypt32")]
extern "system" {
    fn CryptEncryptMessage(
        pEncryptPara: *mut CRYPT_ENCRYPT_MESSAGE_PARA,  // CRYPT_ENCRYPT_MESSAGE_PARA*
        cRecipientCert: u32,  // DWORD
        rgpRecipientCert: *mut *mut CERT_CONTEXT,  // CERT_CONTEXT**
        pbToBeEncrypted: *const u8,  // BYTE* optional
        cbToBeEncrypted: u32,  // DWORD
        pbEncryptedBlob: *mut u8,  // BYTE* optional, out
        pcbEncryptedBlob: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll", SetLastError = true)]
public static extern bool CryptEncryptMessage(IntPtr pEncryptPara, uint cRecipientCert, IntPtr rgpRecipientCert, IntPtr pbToBeEncrypted, uint cbToBeEncrypted, IntPtr pbEncryptedBlob, ref uint pcbEncryptedBlob);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CryptEncryptMessage' -Namespace Win32 -PassThru
# $api::CryptEncryptMessage(pEncryptPara, cRecipientCert, rgpRecipientCert, pbToBeEncrypted, cbToBeEncrypted, pbEncryptedBlob, pcbEncryptedBlob)

#uselib "CRYPT32.dll"
#func global CryptEncryptMessage "CryptEncryptMessage" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; CryptEncryptMessage varptr(pEncryptPara), cRecipientCert, varptr(rgpRecipientCert), varptr(pbToBeEncrypted), cbToBeEncrypted, varptr(pbEncryptedBlob), varptr(pcbEncryptedBlob)   ; 戻り値は stat
; pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA* -> "sptr"
; cRecipientCert : DWORD -> "sptr"
; rgpRecipientCert : CERT_CONTEXT** -> "sptr"
; pbToBeEncrypted : BYTE* optional -> "sptr"
; cbToBeEncrypted : DWORD -> "sptr"
; pbEncryptedBlob : BYTE* optional, out -> "sptr"
; pcbEncryptedBlob : DWORD* in/out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "CRYPT32.dll"
#cfunc global CryptEncryptMessage "CryptEncryptMessage" var, int, var, var, int, var, var
; res = CryptEncryptMessage(pEncryptPara, cRecipientCert, rgpRecipientCert, pbToBeEncrypted, cbToBeEncrypted, pbEncryptedBlob, pcbEncryptedBlob)
; pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA* -> "var"
; cRecipientCert : DWORD -> "int"
; rgpRecipientCert : CERT_CONTEXT** -> "var"
; pbToBeEncrypted : BYTE* optional -> "var"
; cbToBeEncrypted : DWORD -> "int"
; pbEncryptedBlob : BYTE* optional, out -> "var"
; pcbEncryptedBlob : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "CRYPT32.dll"
#cfunc global CryptEncryptMessage "CryptEncryptMessage" sptr, int, sptr, sptr, int, sptr, sptr
; res = CryptEncryptMessage(varptr(pEncryptPara), cRecipientCert, varptr(rgpRecipientCert), varptr(pbToBeEncrypted), cbToBeEncrypted, varptr(pbEncryptedBlob), varptr(pcbEncryptedBlob))
; pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA* -> "sptr"
; cRecipientCert : DWORD -> "int"
; rgpRecipientCert : CERT_CONTEXT** -> "sptr"
; pbToBeEncrypted : BYTE* optional -> "sptr"
; cbToBeEncrypted : DWORD -> "int"
; pbEncryptedBlob : BYTE* optional, out -> "sptr"
; pcbEncryptedBlob : DWORD* in/out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; BOOL CryptEncryptMessage(CRYPT_ENCRYPT_MESSAGE_PARA* pEncryptPara, DWORD cRecipientCert, CERT_CONTEXT** rgpRecipientCert, BYTE* pbToBeEncrypted, DWORD cbToBeEncrypted, BYTE* pbEncryptedBlob, DWORD* pcbEncryptedBlob)
#uselib "CRYPT32.dll"
#cfunc global CryptEncryptMessage "CryptEncryptMessage" var, int, var, var, int, var, var
; res = CryptEncryptMessage(pEncryptPara, cRecipientCert, rgpRecipientCert, pbToBeEncrypted, cbToBeEncrypted, pbEncryptedBlob, pcbEncryptedBlob)
; pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA* -> "var"
; cRecipientCert : DWORD -> "int"
; rgpRecipientCert : CERT_CONTEXT** -> "var"
; pbToBeEncrypted : BYTE* optional -> "var"
; cbToBeEncrypted : DWORD -> "int"
; pbEncryptedBlob : BYTE* optional, out -> "var"
; pcbEncryptedBlob : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; BOOL CryptEncryptMessage(CRYPT_ENCRYPT_MESSAGE_PARA* pEncryptPara, DWORD cRecipientCert, CERT_CONTEXT** rgpRecipientCert, BYTE* pbToBeEncrypted, DWORD cbToBeEncrypted, BYTE* pbEncryptedBlob, DWORD* pcbEncryptedBlob)
#uselib "CRYPT32.dll"
#cfunc global CryptEncryptMessage "CryptEncryptMessage" intptr, int, intptr, intptr, int, intptr, intptr
; res = CryptEncryptMessage(varptr(pEncryptPara), cRecipientCert, varptr(rgpRecipientCert), varptr(pbToBeEncrypted), cbToBeEncrypted, varptr(pbEncryptedBlob), varptr(pcbEncryptedBlob))
; pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA* -> "intptr"
; cRecipientCert : DWORD -> "int"
; rgpRecipientCert : CERT_CONTEXT** -> "intptr"
; pbToBeEncrypted : BYTE* optional -> "intptr"
; cbToBeEncrypted : DWORD -> "int"
; pbEncryptedBlob : BYTE* optional, out -> "intptr"
; pcbEncryptedBlob : DWORD* in/out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCryptEncryptMessage = crypt32.NewProc("CryptEncryptMessage")
)

// pEncryptPara (CRYPT_ENCRYPT_MESSAGE_PARA*), cRecipientCert (DWORD), rgpRecipientCert (CERT_CONTEXT**), pbToBeEncrypted (BYTE* optional), cbToBeEncrypted (DWORD), pbEncryptedBlob (BYTE* optional, out), pcbEncryptedBlob (DWORD* in/out)
r1, _, err := procCryptEncryptMessage.Call(
	uintptr(pEncryptPara),
	uintptr(cRecipientCert),
	uintptr(rgpRecipientCert),
	uintptr(pbToBeEncrypted),
	uintptr(cbToBeEncrypted),
	uintptr(pbEncryptedBlob),
	uintptr(pcbEncryptedBlob),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CryptEncryptMessage(
  pEncryptPara: Pointer;   // CRYPT_ENCRYPT_MESSAGE_PARA*
  cRecipientCert: DWORD;   // DWORD
  rgpRecipientCert: Pointer;   // CERT_CONTEXT**
  pbToBeEncrypted: Pointer;   // BYTE* optional
  cbToBeEncrypted: DWORD;   // DWORD
  pbEncryptedBlob: Pointer;   // BYTE* optional, out
  pcbEncryptedBlob: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'CRYPT32.dll' name 'CryptEncryptMessage';

result := DllCall("CRYPT32\CryptEncryptMessage"
    , "Ptr", pEncryptPara   ; CRYPT_ENCRYPT_MESSAGE_PARA*
    , "UInt", cRecipientCert   ; DWORD
    , "Ptr", rgpRecipientCert   ; CERT_CONTEXT**
    , "Ptr", pbToBeEncrypted   ; BYTE* optional
    , "UInt", cbToBeEncrypted   ; DWORD
    , "Ptr", pbEncryptedBlob   ; BYTE* optional, out
    , "Ptr", pcbEncryptedBlob   ; DWORD* in/out
    , "Int")   ; return: BOOL

●CryptEncryptMessage(pEncryptPara, cRecipientCert, rgpRecipientCert, pbToBeEncrypted, cbToBeEncrypted, pbEncryptedBlob, pcbEncryptedBlob) = DLL("CRYPT32.dll", "bool CryptEncryptMessage(void*, dword, void*, void*, dword, void*, void*)")
# 呼び出し: CryptEncryptMessage(pEncryptPara, cRecipientCert, rgpRecipientCert, pbToBeEncrypted, cbToBeEncrypted, pbEncryptedBlob, pcbEncryptedBlob)
# pEncryptPara : CRYPT_ENCRYPT_MESSAGE_PARA* -> "void*"
# cRecipientCert : DWORD -> "dword"
# rgpRecipientCert : CERT_CONTEXT** -> "void*"
# pbToBeEncrypted : BYTE* optional -> "void*"
# cbToBeEncrypted : DWORD -> "dword"
# pbEncryptedBlob : BYTE* optional, out -> "void*"
# pcbEncryptedBlob : DWORD* in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。