Crtpto++的RSA簽名算法

將常見的一些加密庫都測試一下，再根據情況選擇一個應用到項目中去.crypto++國內用得蠻多的，資料還算比較齊全，但是讓我討厭的是源文件太亂，把所有的算法都包括進去了，我目前不能辨別哪些文件是我需要的，所以編譯crypto++的源代碼生成的靜態(tài)鏈接庫居然達到了34M,很恐怖啊，軟件發(fā)布時光這個算法庫就得34M，比軟件本身還大了，正在想辦法提取自己需要的部分.
    #include "randpool.h"
    #include "rsa.h"
    #include "hex.h"
    #include "files.h"
    #include
    using namespace std;
    using namespace CryptoPP;
    // 函數(shù)聲明
    void GenerateRSAKey(unsigned int keyLength, const char *privFilename, const char *pubFilename, const char *seed);
    string RSAEncryptString(const char *pubFilename, const char *seed, const char *message);
    string RSADecryptString(const char *privFilename, const char *ciphertext);
    RandomPool & GlobalRNG();
    // 主程序
    int main()
    {
    char priKey[128] = {0};
    char pubKey[128] = {0};
    char seed[1024] = {0};
    // 生成 RSA 密鑰對
    strcpy(priKey, "private.ilcd"); // 生成的私鑰文件名
    strcpy(pubKey, "public.ilcd"); // 生成的公鑰文件名
    strcpy(seed, "seed");
    //創(chuàng)建公鑰，考試,大提示私鑰配對
    GenerateRSAKey(1024, priKey, pubKey, seed);
    // RSA 加解密
    char message[1024] = {0};
    strcpy(message, "www.ilcd.tv");
    cout<<"原始字符串:\t"<    string encryptedText = RSAEncryptString(pubKey, seed, message); // RSA 加密
    cout<<"加密后字符串:\t"<    string decryptedText = RSADecryptString(priKey, encryptedText.c_str()); // RSA 解密
    cout<<"解密后字符串:\t"<    return 0;
    }
    // 生成RSA密鑰對
    void GenerateRSAKey(unsigned int keyLength, const char *privFilename, const char *pubFilename, const char *seed)
    {
    RandomPool randPool;
    randPool.Put((byte *)seed, strlen(seed));
    RSAES_OAEP_SHA_Decryptor priv(randPool, keyLength);
    HexEncoder privFile(new FileSink(privFilename));
    priv.DEREncode(privFile);
    privFile.MessageEnd();
    RSAES_OAEP_SHA_Encryptor pub(priv);
    HexEncoder pubFile(new FileSink(pubFilename));
    pub.DEREncode(pubFile);
    pubFile.MessageEnd();
    }
    // RSA加密
    string RSAEncryptString(const char *pubFilename, const char *seed, const char *message)
    {
    FileSource pubFile(pubFilename, true, new HexDecoder);
    RSAES_OAEP_SHA_Encryptor pub(pubFile);
    RandomPool randPool;
    randPool.Put((byte *)seed, strlen(seed));
    string result;
    StringSource(message, true, new PK_EncryptorFilter(randPool, pub, new HexEncoder(new StringSink(result))));
    return result;
    }
    // RSA解密
    string RSADecryptString(const char *privFilename, const char *ciphertext)
    {
    FileSource privFile(privFilename, true, new HexDecoder);
    RSAES_OAEP_SHA_Decryptor priv(privFile);
    string result;
    StringSource(ciphertext, true, new HexDecoder(new PK_DecryptorFilter(GlobalRNG(), priv, new StringSink(result))));
    return result;
    }
    // 定義全局的隨機數(shù)
    RandomPool & GlobalRNG()
    {
    static RandomPool randomPool;
    return randomPool;
    }