利用openssl来计算sha1, sha224, sha256, sha384, sha512

请按照之前博文的介绍配置openssl环境。代码如下：

#include
#include
#include   // OPENSSL_cleanse
#pragma comment(lib, "libeay32.lib")
#pragma comment(lib, "ssleay32.lib")  // 在本程序中， 可以注释掉这句
using namespace std;

const char *orgStr = "hello"; //待哈希的串

// 打印前， 有必要转换
void printHash(unsigned char *md, int len)
{
    int i = 0;
    for (i = 0; i < len; i++)
    {
        printf("%02x", md[i]);
    }

    printf("\n");
}

void myHash1()
{
    SHA_CTX c;
    unsigned char md[SHA_DIGEST_LENGTH];
    SHA1((unsigned char *)orgStr, strlen(orgStr), md);
    printHash(md, SHA_DIGEST_LENGTH);

    SHA1_Init(&c);
    SHA1_Update(&c, orgStr, strlen(orgStr));
    SHA1_Final(md, &c);
    OPENSSL_cleanse(&c, sizeof(c));
    printHash(md, SHA_DIGEST_LENGTH);
}

void myHash224()
{
    SHA256_CTX c;
    unsigned char md[SHA224_DIGEST_LENGTH];
    SHA224((unsigned char *)orgStr, strlen(orgStr), md);
    printHash(md, SHA224_DIGEST_LENGTH);

    SHA224_Init(&c);
    SHA224_Update(&c, orgStr, strlen(orgStr));
    SHA224_Final(md, &c);
    OPENSSL_cleanse(&c, sizeof(c));
    printHash(md, SHA224_DIGEST_LENGTH);
}

void myHash256()
{
    SHA256_CTX c;
    unsigned char md[SHA256_DIGEST_LENGTH];
    SHA256((unsigned char *)orgStr, strlen(orgStr), md);
    printHash(md, SHA256_DIGEST_LENGTH);

    SHA256_Init(&c);
    SHA256_Update(&c, orgStr, strlen(orgStr));
    SHA256_Final(md, &c);
    OPENSSL_cleanse(&c, sizeof(c));
    printHash(md, SHA256_DIGEST_LENGTH);
}

void myHash384()
{
    SHA512_CTX c;
    unsigned char md[SHA384_DIGEST_LENGTH];
    SHA384((unsigned char *)orgStr, strlen(orgStr), md);
    printHash(md, SHA384_DIGEST_LENGTH);

    SHA384_Init(&c);
    SHA384_Update(&c, orgStr, strlen(orgStr));
    SHA384_Final(md, &c);
    OPENSSL_cleanse(&c, sizeof(c));
    printHash(md, SHA384_DIGEST_LENGTH);
}

void myHash512()
{
    SHA512_CTX c;
    unsigned char md[SHA512_DIGEST_LENGTH];
    SHA512((unsigned char *)orgStr, strlen(orgStr), md);
    printHash(md, SHA512_DIGEST_LENGTH);

    SHA512_Init(&c);
    SHA512_Update(&c, orgStr, strlen(orgStr));
    SHA512_Final(md, &c);
    OPENSSL_cleanse(&c, sizeof(c));
    printHash(md, SHA512_DIGEST_LENGTH);
}

int main()
{
    myHash1();
    myHash224();
    myHash256();
    myHash384();
    myHash512();

    return 0;
}

     与其他工具相比， 结果一致。