CSP开发基础--开发实例二

本文实现完整流程，对数据进行Hash,签名，验证签名。程序的流程性较强，或许这就是测试CSP应该有的步骤吧。

本程序使用VS2005编译运行通过。注意在导出头文件的时候，头文件的顺序十分重要，就如同本程序中，

<wincrypt.h>在编译的过程中大量的使用了<windows.h>，因此在引入头文件的顺序时，要首先引入<windows.h>,然后引入<wincrypt.h>.

#include <stdio.h>#include <stdlib.h>#include <windows.h>#include <wincrypt.h>void main() {HCRYPTPROV hProv;BYTE* puBuffer = (BYTE*)"data hash and sign.";DWORD dwBufferLen = strlen((char*)puBuffer) + 1;HCRYPTHASH hHash;HCRYPTKEY hKey;    //签名密钥句柄HCRYPTKEY hPubKey;BYTE* pbKeyBlob;  //保存密钥blob缓冲区指针BYTE* pbSignature;DWORD dwSigLen;DWORD dwBlobLen;DWORD i;if(CryptAcquireContext(&hProv,"test",NULL,PROV_RSA_FULL,0))printf("打开句柄成功\n");else {if(!CryptAcquireContext(&hProv,"test",NULL,PROV_RSA_FULL,CRYPT_NEWKEYSET))printf("创建失败。\n");}if(CryptGetUserKey(hProv,AT_SIGNATURE,&hKey))printf("获得签名密钥成功。\n");else {printf("获取失败，现在创建新的RSA密钥对。\n");if(!CryptAcquireContext(&hProv,"test",NULL,PROV_RSA_FULL,0))printf("获取CSP句柄失败\n");if(!CryptGenKey(hProv,2,CRYPT_EXPORTABLE | 0X04000000,&hKey))printf("CryptGenKey error.\n");}if(CryptExportKey(hKey,NULL,PUBLICKEYBLOB,0,NULL,&dwBlobLen))printf("we get the length of the public key.\n");elseprintf("CryptExportKey erro.\n");if(pbKeyBlob = (BYTE*)malloc(dwBlobLen))printf("we get the memory.\n");elseprintf("malloc erro.\n");if(CryptExportKey(hKey,NULL,PUBLICKEYBLOB,0,pbKeyBlob,&dwBlobLen))printf("export the public key.\n");elseprintf("CryptExportKeya error.\n");if(CryptCreateHash(hProv,CALG_SHA1,0,0,&hHash))printf("CreateHash succeed.\n");elseprintf("CreatHash error.\n");if(CryptHashData(hHash,puBuffer,dwBufferLen,0))printf("HashData succeed.\n ");elseprintf("HashData error.\n");dwSigLen = 0;if(CryptSignHash(hHash,AT_SIGNATURE,NULL,0,NULL,&dwSigLen))printf("Get the length of signature.\n");elseprintf("CryptSignHash error.\n");if(pbSignature = (BYTE*) malloc(dwSigLen))printf("get the memory.\n");elseprintf("memory error.\n");if(CryptSignHash(hHash,AT_SIGNATURE,NULL,0,pbSignature,&dwSigLen))printf("signature succeed.\n");elseprintf("Signature error.\n");printf("Signature: \n");for(i=0;i<dwSigLen;i++) {if((i==0) && (i!=0))printf("\n");printf("%2.2x",pbSignature[i]);}printf("\n");printf("OK.\n");if(hHash)CryptDestroyHash(hHash);if(CryptImportKey(hProv,pbKeyBlob,dwBlobLen,0,0,&hPubKey))printf("Import the key.\n");elseprintf("erro");    if(CryptCreateHash(hProv,CALG_SHA1,0,0,&hHash))printf("创建哈希对象成功 \n");elseprintf("调用CryptCreateHash失败");if(CryptHashData(hHash,puBuffer,dwBufferLen,0))printf("数据哈希完成.\n");elseprintf("调用CryptHashData失败");if(CryptVerifySignature(hHash,pbSignature,dwSigLen,hPubKey,NULL,0))printf("验证签名成功。\n");elseprintf("签名验证失败，签名无效");if(pbSignature)free(pbSignature);if(hHash)CryptDestroyHash(hHash);if(hProv)CryptReleaseContext(hProv,0);system("pause");}