使用CryptoApi做PKCS#1格式加密

#include "stdafx.h"#include <windows.h>#include <Wincrypt.h>#pragma comment(lib, "crypt32.lib")int _tmain(int argc, _TCHAR* argv[]){HCERTSTORE hStore = CertOpenSystemStore(NULL, L"MY");PCCERT_CONTEXT pCert = NULL;DWORD dwKeySpec = AT_KEYEXCHANGE;pCert = CertFindCertificateInStore(hStore, X509_ASN_ENCODING|PKCS_7_ASN_ENCODING, 0, CERT_FIND_KEY_SPEC, (void*)&dwKeySpec, NULL);if (pCert == NULL)return -1;HCRYPTPROV hCryptProv = NULL;BOOL bCallerFreeProvOrNCryptKey = FALSE;if (!CryptAcquireCertificatePrivateKey(pCert, 0, NULL, &hCryptProv, &dwKeySpec, &bCallerFreeProvOrNCryptKey)){return -1;}HCRYPTKEY hPrvKey = NULL;if (!CryptGetUserKey(hCryptProv, dwKeySpec, &hPrvKey))return -1;HCRYPTKEY hPubKey = NULL;if (!CryptImportPublicKeyInfo(hCryptProv, X509_ASN_ENCODING, &(pCert->pCertInfo->SubjectPublicKeyInfo), &hPubKey))return -1;//if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0))//return -1;LPCSTR pszData = "<a><b>123</b></a>";DWORD dwDataLen = strlen(pszData) + 1;BYTE* pbEncode = new BYTE[260];memcpy_s(pbEncode, 256, pszData, dwDataLen);if (!CryptEncrypt(hPubKey, NULL, TRUE, 0, pbEncode, &dwDataLen, 256))return -1;BYTE* pbDecoded = new BYTE[260];memcpy_s(pbDecoded, 256, pbEncode, dwDataLen);if (!CryptDecrypt(hPrvKey, NULL, TRUE, 0, pbDecoded, &dwDataLen))return -1;delete[] pbEncode;delete[] pbDecoded;CryptDestroyKey(hPubKey);CryptDestroyKey(hPrvKey);CryptReleaseContext(hCryptProv);CertFreeCertificateContext(pCert);CertCloseStore(hStore);return 0;}