使用bcrypt加密（VC ++） [英] Encryption using bcrypt (VC++)

问题描述

我使用SHA256算法获取哈希值。

我的应用程序生成的哈希值与在线工具生成的哈希值相同。



我尝试过：

I used SHA256 algorithm for getting hash.
THe hash produced by my application is not same as the one generated by online tools for the same string.

What I have tried:

        BCRYPT_ALG_HANDLE       hAlg            = NULL;
        BCRYPT_HASH_HANDLE      hHash           = NULL;
        NTSTATUS                status          = STATUS_UNSUCCESSFUL;
        DWORD                   cbData          = 0,
            cbHash          = 0,
            cbHashObject    = 0;
        PBYTE                   pbHashObject    = NULL;
        PBYTE                   pbHash          = NULL;


        //open an algorithm handle
        if(!NT_SUCCESS(status = BCryptOpenAlgorithmProvider(
            &hAlg,
            BCRYPT_SHA256_ALGORITHM,
            NULL,
            0)))
        {
            goto Cleanup;
        }

        //calculate the size of the buffer to hold the hash object
        if(!NT_SUCCESS(status = BCryptGetProperty(
            hAlg, 
            BCRYPT_OBJECT_LENGTH, 
            (PBYTE)&cbHashObject, 
            sizeof(DWORD), 
            &cbData, 
            0)))
        {

            goto Cleanup;
        }

        //allocate the hash object on the heap
        pbHashObject = (PBYTE)HeapAlloc (GetProcessHeap (), 0, cbHashObject);
        if(NULL == pbHashObject)
        {

            goto Cleanup;
        }

        //calculate the length of the hash
        if(!NT_SUCCESS(status = BCryptGetProperty(
            hAlg, 
            BCRYPT_HASH_LENGTH, 
            (PBYTE)&cbHash, 
            sizeof(DWORD), 
            &cbData, 
            0)))
        {

            goto Cleanup;
        }

        //allocate the hash buffer on the heap
        pbHash = (PBYTE)HeapAlloc (GetProcessHeap (), 0, cbHash);
        if(NULL == pbHash)
        {

            goto Cleanup;
        }

        //create a hash
        if(!NT_SUCCESS(status = BCryptCreateHash(
            hAlg, 
            &hHash, 
            pbHashObject, 
            cbHashObject, 
            NULL, 
            0, 
            0)))
        {

            goto Cleanup;
        }


        PCWSTR pwTst = (PCWSTR)csText_i;
        //hash some data
        if(!NT_SUCCESS(status = BCryptHashData(
            hHash,
            (PBYTE)pwTst,
            sizeof(rgbMsg),
            0)))
        {

            goto Cleanup;
        }

        //close the hash
        if(!NT_SUCCESS(status = BCryptFinishHash(
            hHash, 
            pbHash, 
            cbHash, 
            0)))
        {
            goto Cleanup;
        }

PCWSTR pTst = (PCWSTR)pbHash;
csEnryptedText_o = pTst;

是因为我投射的方式??

Is it because of the way i cast??

推荐答案

ccInput 参数 BCryptHashData 错误：

The cbInput parameter of BCryptHashData is wrong:

if(!NT_SUCCESS(status = BCryptHashData(
    hHash,
    (PBYTE)pwTst,
    sizeof(rgbMsg),
    0)))
    {
        goto Cleanup;
    }

BCryptHashData函数（Windows） [ ^ ]：

cbInput [in]



pbInput缓冲区中的字节数。

cbInput [in]

The number of bytes in the pbInput buffer.

应该可能是

It should be probably

if(!NT_SUCCESS(status = BCryptHashData(
    hHash,
    (PBYTE)pwTst,
    wcslen(pwTest) * sizeof(wchar_t),
    0)))
{
        goto Cleanup;
}

这要求 csText_i 是一个空终止的宽字符串。该行

This requires that csText_i is a null terminated wide string. The line

PCWSTR pwTst = (PCWSTR)csText_i;

让我假设情况并非如此，否则应该没有必要强制转换为 PCWSTR 。

let me assume that this is not the case because otherwise there should be no need to cast to PCWSTR.

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