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API NcryptCreatePersistedKey is not accepting a WCHAR* pointer for the parameter pszKeyName. It crashes . If I give a string literal like L"sample_key" then it works. Can someone pls suggest a workaround?
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Show a code example that reproduces your issue.
pcsKeyId = (WCHAR*)HeapAlloc(GetProcessHeap(), 0, count_reqd);
if (NULL == pcsKeyId)
{
wprintf(L"**** memory allocation for pcsKeyId failed\n");
goto Cleanup;
}
MultiByteToWideChar(CP_ACP, 0, pbKeyId, ccCount, pcsKeyId, count_reqd);
//**********************************************************************
//open handle to KSP
if (FAILED(secStatus = NCryptOpenStorageProvider(
&hProv,
MS_KEY_STORAGE_PROVIDER,
0)))
{
wprintf(L"**** Error 0x%x returned by NCryptOpenStorageProvider\n", secStatus);
goto Cleanup;
}
//************************************************************
//************************************************************
//create a persisted key
if (FAILED(secStatus = NCryptCreatePersistedKey(
hProv,
&hKey,
NCRYPT_ECDSA_P256_ALGORITHM,
pcsKeyId,
0,
0)))
I have pasted a part of the code. The code is basically reading CHAR string from a FILE into pbKeyId and converting it to WCHAR *pcsKeyId, and then passing the pointer to API NcryptCreatePersistedKey. If I replace pcsKeyId with L"samplekey" then it works.
I have printed pcsKeyId string and it looks OK.
Is your wide character string null terminated? Check with the memory debug pane to be sure the pointer you're passing has 2 bytes of 0 at the end of the string.
Pls also note that I have checked that the pcsKeyId string is zero terminated.
Thanks for your time.
What is the return value from NCryptCreatePersistedKey, presumably its NTE_INVALID_PARAMETER?
Try this allocation:
pcsKeyId = (WCHAR*)HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR) * count_reqd);
Thank you all, it worked. It seems memory allocation was not proper , but somehow pcsKeyId was printing correctly before I passed it to Ncrypt API.