I'm trying to setup server-side encryption using SSPI. I'm successfully (as far as I can tell) loading a certificate stored as a PFX file, but the call to m_pSSPI->AcquireCredentialsHandleA() returns 0x8009030e.
This method seems to successfully load the file and return a CERT_CONTEXT object.
HRESULT CTLSPackage::LoadCertContextFromFilePFX (PCWSTR pcwzFile, PCWSTR pcwzPassword, __deref_out PCCERT_CONTEXT* ppctxCert)
{
HRESULT hr;
HANDLE hFile, hSection = NULL;
BOOL (WINAPI* pfnPFXIsPFXBlob)(CRYPT_DATA_BLOB*);
HCERTSTORE (WINAPI* pfnPFXImportCertStore)(CRYPT_DATA_BLOB*, LPCWSTR, DWORD);
PCCERT_CONTEXT (WINAPI* pfnCertEnumCertificatesInStore)(HCERTSTORE hCertStore, PCCERT_CONTEXT pPrevCertContext);
CRYPT_DATA_BLOB blob; blob.pbData = NULL;
HCERTSTORE pfxStore = NULL;
hFile = CreateFile(pcwzFile, FILE_READ_DATA, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
CheckIfGetLastError(INVALID_HANDLE_VALUE == hFile);
blob.cbData = GetFileSize(hFile, NULL);
hSection = CreateFileMapping(hFile, 0, PAGE_READONLY, 0, 0, 0);
CheckIfGetLastError(NULL == hSection);
blob.pbData = reinterpret_cast<PBYTE>(MapViewOfFile(hSection, FILE_MAP_READ, 0, 0, 0));
CheckIfGetLastError(NULL == blob.pbData);
Check(TGetFunction(m_hCrypt32, "PFXIsPFXBlob", &pfnPFXIsPFXBlob));
Check(TGetFunction(m_hCrypt32, "PFXImportCertStore", &pfnPFXImportCertStore));
Check(TGetFunction(m_hCrypt32, "CertEnumCertificatesInStore", &pfnCertEnumCertificatesInStore));
CheckIf(!pfnPFXIsPFXBlob(&blob), E_FAIL);
pfxStore = pfnPFXImportCertStore(&blob, pcwzPassword, CRYPT_MACHINE_KEYSET | CRYPT_EXPORTABLE);
CheckIf(NULL == pfxStore, SEC_E_NO_CREDENTIALS);
*ppctxCert = pfnCertEnumCertificatesInStore(pfxStore, NULL);
CheckIf(NULL == *ppctxCert, SEC_E_NO_CREDENTIALS);
Cleanup:
if(pfxStore)
{
BOOL (WINAPI* pfnCertCloseStore)(HCERTSTORE, DWORD);
if(SUCCEEDED(TGetFunction(m_hCrypt32, "CertCloseStore", &pfnCertCloseStore)))
pfnCertCloseStore(pfxStore, 0);
}
if(blob.pbData)
UnmapViewOfFile(blob.pbData);
SafeCloseHandle(hSection);
SafeCloseFileHandle(hFile);
return hr;
}
The result is immediately passed to another class method, which makes the failing AcquireCredentialsHandleA() call.
HRESULT CTLSPackage::AcquireCredentials (__in_opt PCCERT_CONTEXT pCertContext, PCredHandle phCreds)
{
SCHANNEL_CRED SchannelCred;
TimeStamp tsExpiry;
ZeroMemory(&SchannelCred, sizeof(SchannelCred));
SchannelCred.dwVersion = SCHANNEL_CRED_VERSION;
if(pCertContext)
{
SchannelCred.cCreds = 1;
SchannelCred.paCred = &pCertContext;
}
SchannelCred.grbitEnabledProtocols = SP_PROT_TLS1 | SP_PROT_TLS1_1 | SP_PROT_TLS1_2;
if(!m_fServer)
SchannelCred.dwFlags |= SCH_CRED_NO_DEFAULT_CREDS | SCH_USE_STRONG_CRYPTO;
//
// Create an SSPI credential.
//
return m_pSSPI->AcquireCredentialsHandleA(
NULL, // Name of principal
m_fServer ? NEGOSSP_NAME_A : UNISP_NAME_A, // Name of package
m_fServer ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND,
NULL, // Pointer to logon ID
&SchannelCred, // Package specific data
NULL, // Pointer to GetKey() func
NULL, // Value to pass to GetKey()
phCreds, // (out) Cred Handle
&tsExpiry); // (out) Lifetime (optional)
}
My CTLSPackage::AcquireCredentials() code path is also used for setting up client-side encryption, and that works. For the server-side path, m_fServer is TRUE. The m_hCrypt32 member was loaded from Crypt32.dll.
I've cobbled together this code from samples, but I must be missing something for the server case. I only need to setup SSL/TLS-style encryption, so the "No credentials are available in the security package" error is weird because I have no need for credential authentication.
Does anyone know what might be missing? Thanks!
With a hint from RbMm, I then found this article: https://www.codeproject.com/articles/125124/how-to-use-certificate-from-disk-with-microsoft-cr
The short answer is that CryptAcquireCertificatePrivateKey() needed to be used when loading a PFX from a file, and UNISP_NAME_A needed to be passed to AcquireCredentialsHandleA().
For reference, here is the revised code:
HRESULT CTLSPackage::LoadCertContextFromFilePFX (PCWSTR pcwzFile, PCWSTR pcwzPassword, __deref_out PCCERT_CONTEXT* ppctxCert)
{
HRESULT hr;
HANDLE hFile, hSection = NULL;
BOOL (WINAPI* pfnPFXIsPFXBlob)(CRYPT_DATA_BLOB*);
HCERTSTORE (WINAPI* pfnPFXImportCertStore)(CRYPT_DATA_BLOB*, LPCWSTR, DWORD);
PCCERT_CONTEXT (WINAPI* pfnCertFindCertificateInStore)(HCERTSTORE hCertStore, DWORD dwCertEncodingType, DWORD dwFindFlags, DWORD dwFindType, const void* pvFindPara, PCCERT_CONTEXT pPrevCertContext);
BOOL (WINAPI* pfnCryptAcquireCertificatePrivateKey)(PCCERT_CONTEXT pCert, DWORD dwFlags, void* pvReserved, HCRYPTPROV_OR_NCRYPT_KEY_HANDLE *phCryptProvOrNCryptKey, DWORD* pdwKeySpec, BOOL* pfCallerFreeProvOrNCryptKey);
HCRYPTPROV_OR_NCRYPT_KEY_HANDLE hProv;
DWORD dwKeySpec;
BOOL fFreeProv = FALSE;
CRYPT_DATA_BLOB blob; blob.pbData = NULL;
HCERTSTORE hpfxStore = NULL;
hFile = CreateFile(pcwzFile, FILE_READ_DATA, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
CheckIfGetLastError(INVALID_HANDLE_VALUE == hFile);
blob.cbData = GetFileSize(hFile, NULL);
hSection = CreateFileMapping(hFile, 0, PAGE_READONLY, 0, 0, 0);
CheckIfGetLastError(NULL == hSection);
blob.pbData = reinterpret_cast<PBYTE>(MapViewOfFile(hSection, FILE_MAP_READ, 0, 0, 0));
CheckIfGetLastError(NULL == blob.pbData);
Check(TGetFunction(m_hCrypt32, "PFXIsPFXBlob", &pfnPFXIsPFXBlob));
Check(TGetFunction(m_hCrypt32, "PFXImportCertStore", &pfnPFXImportCertStore));
Check(TGetFunction(m_hCrypt32, "CertFindCertificateInStore", &pfnCertFindCertificateInStore));
Check(TGetFunction(m_hCrypt32, "CryptAcquireCertificatePrivateKey", &pfnCryptAcquireCertificatePrivateKey));
CheckIf(!pfnPFXIsPFXBlob(&blob), HRESULT_FROM_WIN32(ERROR_BAD_FORMAT));
hpfxStore = pfnPFXImportCertStore(&blob, pcwzPassword, 0);
if(NULL == hpfxStore && pcwzPassword && L'\0' == *pcwzPassword)
{
hpfxStore = pfnPFXImportCertStore(&blob, NULL, 0);
CheckIf(NULL == hpfxStore, SEC_E_NO_CREDENTIALS);
}
*ppctxCert = pfnCertFindCertificateInStore(hpfxStore, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, 0, CERT_FIND_ANY, NULL, NULL);
CheckIfGetLastError(NULL == *ppctxCert);
// Acquire the private key and make it available for the later AcquireCredentalsHandle() call.
if(!pfnCryptAcquireCertificatePrivateKey(*ppctxCert, 0, NULL, &hProv, &dwKeySpec, &fFreeProv))
{
DWORD dwError = GetLastError();
FreeCertificateContext(*ppctxCert);
*ppctxCert = NULL;
CheckWin32Error(dwError);
}
Cleanup:
if(fFreeProv)
FreeProvOrNCryptKey(hProv, dwKeySpec);
if(hpfxStore)
{
BOOL (WINAPI* pfnCertCloseStore)(HCERTSTORE, DWORD);
if(SUCCEEDED(TGetFunction(m_hCrypt32, "CertCloseStore", &pfnCertCloseStore)))
pfnCertCloseStore(hpfxStore, 0);
}
if(blob.pbData)
UnmapViewOfFile(blob.pbData);
SafeCloseHandle(hSection);
SafeCloseFileHandle(hFile);
return hr;
}
HRESULT CTLSPackage::AcquireCredentials (__in_opt PCCERT_CONTEXT pCertContext, PCredHandle phCreds)
{
SCHANNEL_CRED SchannelCred;
TimeStamp tsExpiry;
ZeroMemory(&SchannelCred, sizeof(SchannelCred));
SchannelCred.dwVersion = SCHANNEL_CRED_VERSION;
if(pCertContext)
{
SchannelCred.cCreds = 1;
SchannelCred.paCred = &pCertContext;
}
SchannelCred.grbitEnabledProtocols = SP_PROT_SSL3 | SP_PROT_TLS1 | SP_PROT_TLS1_1 | SP_PROT_TLS1_2;
SchannelCred.dwFlags = SCH_USE_STRONG_CRYPTO;
if(!m_fServer)
SchannelCred.dwFlags |= SCH_CRED_NO_DEFAULT_CREDS;
//
// Create an SSPI credential.
//
return m_pSSPI->AcquireCredentialsHandleA(
NULL, // Name of principal
UNISP_NAME_A, // Name of package
m_fServer ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND,
NULL, // Pointer to logon ID
&SchannelCred, // Package specific data
NULL, // Pointer to GetKey() func
NULL, // Value to pass to GetKey()
phCreds, // (out) Cred Handle
&tsExpiry); // (out) Lifetime (optional)
}