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

#include <iostream>
#include <openssl/sha.h>
#include <openssl/crypto.h>  // 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;
}