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95 lines
2.7 KiB
95 lines
2.7 KiB
#ifndef __POP3_AUTH_MD5_UTIL_H__
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#define __POP3_AUTH_MD5_UTIL_H__
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#define UnicodeToAnsi(A, cA, U, cU) WideCharToMultiByte(CP_ACP,0,(U),(cU),(A),(cA),NULL,NULL)
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#define AnsiToUnicode(A, cA, U, cU) MultiByteToWideChar(CP_ACP,0,(A),(cA),(U),(cU))
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#include <mailbox.h>
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#include <Pop3RegKeys.h>
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#include <WinCrypt.h>
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HRESULT GetMD5Password(BSTR bstrUserName, char szPassword[MAX_PATH])
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{
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if(NULL == bstrUserName)
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{
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return E_POINTER;
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}
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WCHAR wszAuthGuid[MAX_PATH];
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BYTE szEncryptedPswd[MAX_PATH];
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DWORD dwEncryptedPswd;
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DWORD dwAuthDataLen=MAX_PATH;
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DWORD dwCryptDataLen;
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HRESULT hr = E_FAIL;
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CMailBox mailboxX;
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HCRYPTPROV hProv=NULL;
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HCRYPTHASH hHash=NULL;
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HCRYPTKEY hKey=NULL;
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if ( mailboxX.OpenMailBox( bstrUserName ) )
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{
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if ( mailboxX.LockMailBox())
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{
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if ( mailboxX.GetEncyptedPassword( szEncryptedPswd, MAX_PATH, &dwEncryptedPswd ))
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{
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if(ERROR_SUCCESS == RegQueryAuthGuid(wszAuthGuid, &(dwAuthDataLen)) )
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{
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if(!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
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{
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goto EXIT;
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}
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if(!CryptCreateHash(hProv, CALG_MD5, 0, 0, &hHash))
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{
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goto EXIT;
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}
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if(!CryptHashData(hHash, (LPBYTE)wszAuthGuid, dwAuthDataLen, 0))
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{
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goto EXIT;
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}
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if(!CryptDeriveKey(hProv, CALG_RC4, hHash, (128<<16),&hKey))
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{
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goto EXIT;
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}
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dwCryptDataLen=dwEncryptedPswd;
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if(CryptDecrypt(hKey, NULL, TRUE, 0, szEncryptedPswd, &dwCryptDataLen))
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{
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if(dwCryptDataLen < MAX_PATH -1)
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{
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UnicodeToAnsi(szPassword, dwCryptDataLen, (LPCWSTR)szEncryptedPswd, -1);
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szPassword[dwCryptDataLen]=0;
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hr=S_OK;
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}
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}
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}
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}
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mailboxX.UnlockMailBox();
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}
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}
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else if( GetLastError()==ERROR_ACCESS_DENIED)
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{
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hr=E_ACCESSDENIED;
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}
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EXIT:
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if(hKey)
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{
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CryptDestroyKey(hKey);
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}
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if(hHash)
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{
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CryptDestroyHash(hHash);
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}
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if(hProv)
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{
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CryptReleaseContext(hProv, 0);
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}
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return hr;
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}
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#endif //__POP3_AUTH_MD5_UTIL_H__
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