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// Code adapted from the NodeJS kerberos library:
//
// https://github.com/christkv/kerberos/tree/master/lib/win32/kerberos_sspi.c
//
// Under the terms of the Apache License, Version 2.0:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
#include <stdlib.h>
#include "sspi_windows.h"
static HINSTANCE sspi_secur32_dll = NULL;
int load_secur32_dll()
{
sspi_secur32_dll = LoadLibrary("secur32.dll");
if (sspi_secur32_dll == NULL) {
return GetLastError();
}
return 0;
}
SECURITY_STATUS SEC_ENTRY call_sspi_encrypt_message(PCtxtHandle phContext, unsigned long fQOP, PSecBufferDesc pMessage, unsigned long MessageSeqNo)
{
if (sspi_secur32_dll == NULL) {
return -1;
}
encryptMessage_fn pfn_encryptMessage = (encryptMessage_fn) GetProcAddress(sspi_secur32_dll, "EncryptMessage");
if (!pfn_encryptMessage) {
return -2;
}
return (*pfn_encryptMessage)(phContext, fQOP, pMessage, MessageSeqNo);
}
SECURITY_STATUS SEC_ENTRY call_sspi_acquire_credentials_handle(
LPSTR pszPrincipal, LPSTR pszPackage, unsigned long fCredentialUse,
void *pvLogonId, void *pAuthData, SEC_GET_KEY_FN pGetKeyFn, void *pvGetKeyArgument,
PCredHandle phCredential, PTimeStamp ptsExpiry)
{
if (sspi_secur32_dll == NULL) {
return -1;
}
acquireCredentialsHandle_fn pfn_acquireCredentialsHandle;
#ifdef _UNICODE
pfn_acquireCredentialsHandle = (acquireCredentialsHandle_fn) GetProcAddress(sspi_secur32_dll, "AcquireCredentialsHandleW");
#else
pfn_acquireCredentialsHandle = (acquireCredentialsHandle_fn) GetProcAddress(sspi_secur32_dll, "AcquireCredentialsHandleA");
#endif
if (!pfn_acquireCredentialsHandle) {
return -2;
}
return (*pfn_acquireCredentialsHandle)(
pszPrincipal, pszPackage, fCredentialUse, pvLogonId, pAuthData,
pGetKeyFn, pvGetKeyArgument, phCredential, ptsExpiry);
}
SECURITY_STATUS SEC_ENTRY call_sspi_initialize_security_context(
PCredHandle phCredential, PCtxtHandle phContext, LPSTR pszTargetName,
unsigned long fContextReq, unsigned long Reserved1, unsigned long TargetDataRep,
PSecBufferDesc pInput, unsigned long Reserved2, PCtxtHandle phNewContext,
PSecBufferDesc pOutput, unsigned long *pfContextAttr, PTimeStamp ptsExpiry)
{
if (sspi_secur32_dll == NULL) {
return -1;
}
initializeSecurityContext_fn pfn_initializeSecurityContext;
#ifdef _UNICODE
pfn_initializeSecurityContext = (initializeSecurityContext_fn) GetProcAddress(sspi_secur32_dll, "InitializeSecurityContextW");
#else
pfn_initializeSecurityContext = (initializeSecurityContext_fn) GetProcAddress(sspi_secur32_dll, "InitializeSecurityContextA");
#endif
if (!pfn_initializeSecurityContext) {
return -2;
}
return (*pfn_initializeSecurityContext)(
phCredential, phContext, pszTargetName, fContextReq, Reserved1, TargetDataRep,
pInput, Reserved2, phNewContext, pOutput, pfContextAttr, ptsExpiry);
}
SECURITY_STATUS SEC_ENTRY call_sspi_query_context_attributes(PCtxtHandle phContext, unsigned long ulAttribute, void *pBuffer)
{
if (sspi_secur32_dll == NULL) {
return -1;
}
queryContextAttributes_fn pfn_queryContextAttributes;
#ifdef _UNICODE
pfn_queryContextAttributes = (queryContextAttributes_fn) GetProcAddress(sspi_secur32_dll, "QueryContextAttributesW");
#else
pfn_queryContextAttributes = (queryContextAttributes_fn) GetProcAddress(sspi_secur32_dll, "QueryContextAttributesA");
#endif
if (!pfn_queryContextAttributes) {
return -2;
}
return (*pfn_queryContextAttributes)(phContext, ulAttribute, pBuffer);
}
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