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windows: add support for DPAPI

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DPAPI allows machine or user-based blob encryption, using APIs from
crypt32:

https://docs.microsoft.com/en-us/windows/win32/api/dpapi/nf-dpapi-cryptunprotectdata
https://docs.microsoft.com/en-us/windows/win32/api/dpapi/nf-dpapi-cryptprotectdata

Change-Id: I57fb4f1877a5fb7629809e79111cbfa02b11cca3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/285716
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Jason A. Donenfeld
2021-01-23 23:11:50 +00:00
parent 07034700bc
commit 1d476976d1
3 changed files with 43 additions and 0 deletions
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windows/syscall_windows.go
+2
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@@ -285,6 +285,8 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//sys CertFindExtension(objId *byte, countExtensions uint32, extensions *CertExtension) (ret *CertExtension) = crypt32.CertFindExtension
//sys CryptQueryObject(objectType uint32, object unsafe.Pointer, expectedContentTypeFlags uint32, expectedFormatTypeFlags uint32, flags uint32, msgAndCertEncodingType *uint32, contentType *uint32, formatType *uint32, certStore *Handle, msg *Handle, context *unsafe.Pointer) (err error) = crypt32.CryptQueryObject
//sys CryptDecodeObject(encodingType uint32, structType *byte, encodedBytes *byte, lenEncodedBytes uint32, flags uint32, decoded unsafe.Pointer, decodedLen *uint32) (err error) = crypt32.CryptDecodeObject
//sys CryptProtectData(dataIn *DataBlob, name *uint16, optionalEntropy *DataBlob, reserved uintptr, promptStruct *CryptProtectPromptStruct, flags uint32, dataOut *DataBlob) (err error) = crypt32.CryptProtectData
//sys CryptUnprotectData(dataIn *DataBlob, name **uint16, optionalEntropy *DataBlob, reserved uintptr, promptStruct *CryptProtectPromptStruct, flags uint32, dataOut *DataBlob) (err error) = crypt32.CryptUnprotectData
//sys WinVerifyTrustEx(hwnd HWND, actionId *GUID, data *WinTrustData) (ret error) = wintrust.WinVerifyTrustEx
//sys RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW
//sys RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey