OpenSSL 1.1.1 新特性: 全面支持国密SM2/SM3/SM4加密算法

OpenSSL项目最近6个月添加了许多新特性, 包括对中国SM2/SM3/SM4算法的支持:

• SM2椭圆曲线: https://github.com/openssl/openssl/pull/4793
• SM3哈希摘要: https://github.com/openssl/openssl/pull/4616
• SM4对称加密: https://github.com/openssl/openssl/pull/4552

参考: 中国国家密码管理局制定的商业密码算法标准

• 《GM/T 0006-2012 密码应用标识规范》定义国密算法OID标识

• 《GB/T 32907-2016 SM4分组密码算法》(原GM/T 0002-2012)

• 《GB/T 329??-2016 SM2椭圆曲线公钥密码算法》(原GM/T 0003-2012)

• 《GB/T 32905-2016 SM3密码杂凑算法》(原GM/T 0004-2012)

下载源码, 编译, 以及验证步骤

下载源码

• https://www.openssl.org/source/openssl-1.1.1-pre4.tar.gz
• https://www.openssl.org/source/openssl-1.1.1-pre5.tar.gz

解压缩

tar xzvf openssl-1.1.1-pre4.tar.gz
tar xzvf openssl-1.1.1-pre5.tar.gz

编译步骤

cd openssl-1.1.1-pre5
./config
make

本地安装(可选步骤)

sudo make install

配置LD_LIBRARY_PATH并检查openssl可执行程序版本号

$ export LD_LIBRARY_PATH=`pwd`

$ ./apps/openssl version
OpenSSL 1.1.1-pre5 (beta) 17 Apr 2018

检查 SM3 哈希校验和

$ echo -n "abc" | ./apps/openssl dgst -SM3
(stdin)= 66c7f0f462eeedd9d1f2d46bdc10e4e24167c4875cf2f7a2297da02b8f4ba8e0

检查椭圆曲线是否包含SM2

$ ./apps/openssl ecparam -list_curves | grep SM2
  SM2       : SM2 curve over a 256 bit prime field

检查对称算法

./apps/openssl enc -ciphers
-sm4
-sm4-cbc
-sm4-cfb
-sm4-ctr
-sm4-ecb
-sm4-ofb

查找SM4对称加密API接口文档

???

SM4-自测试数据

1. 测试SM4-ECB电子密码本模式, 选取AES-128-ECB作为参考
   https://github.com/liuqun/openssl-sm4-demo/

/** 文件名: https://github.com/liuqun/openssl-sm4-demo/blob/cmake/src/main.c */
#include 
#include 
#include 
#include 
#include "openssl/err.h"
#include "openssl/evp.h"

/* Before OpenSSL 1.1.1-pre1, we did not have EVP_sm4_ecb() */
#if defined(OPENSSL_VERSION_NUMBER) \
    && OPENSSL_VERSION_NUMBER < 0x10101001L
static const EVP_CIPHER *(*EVP_sm4_ecb)()=EVP_aes_128_ecb;
#endif

typedef struct {
    const unsigned char *in_data;
    size_t in_data_len;
    int in_data_is_already_padded;
    const unsigned char *in_ivec;
    const unsigned char *in_key;
    size_t in_key_len;
} test_case_t;


void test_encrypt_with_cipher(const test_case_t *in, const EVP_CIPHER *cipher)
{
    unsigned char *out_buf = NULL;
    int out_len;
    int out_padding_len;
    EVP_CIPHER_CTX *ctx;

    ctx = EVP_CIPHER_CTX_new();
    EVP_EncryptInit_ex(ctx, cipher, NULL, in->in_key, in->in_ivec);

    if (in->in_data_is_already_padded)
    {
        /* Check whether the input data is already padded.
        And its length must be an integral multiple of the cipher's block size. */
        const size_t bs = EVP_CIPHER_block_size(cipher);
        if (in->in_data_len % bs != 0)
        {
            printf("ERROR-1: data length=%d which is not added yet; block size=%d\n", (int) in->in_data_len, (int) bs);
            /* Warning: Remember to do some clean-ups */
            EVP_CIPHER_CTX_free(ctx);
            return;
        }
        /* Disable the implicit PKCS#7 padding defined in EVP_CIPHER */
        EVP_CIPHER_CTX_set_padding(ctx, 0);
    }

    out_buf = (unsigned char *) malloc(((in->in_data_len>>4)+1) << 4);
    out_len = 0;
    EVP_EncryptUpdate(ctx, out_buf, &out_len, in->in_data, in->in_data_len);
    if (1)
    {
        printf("Debug: out_len=%d\n", out_len);
    }

    out_padding_len = 0;
    EVP_EncryptFinal_ex(ctx, out_buf+out_len, &out_padding_len);
    if (1)
    {
        printf("Debug: out_padding_len=%d\n", out_padding_len);
    }

    EVP_CIPHER_CTX_free(ctx);
    if (1)
    {
        int i;
        int len;
        len = out_len + out_padding_len;
        for (i=0; i= 0x10101001L);
    int have_aes = 1;
    const unsigned char data[]=
    {
        0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
        0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
    };
    unsigned char ivec[EVP_MAX_IV_LENGTH]; ///< IV 向量
    const unsigned char key1[16] = ///< key_data, 密钥内容, 至少16字节
    {
        0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
        0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
    };
    test_case_t tc;

    tc.in_data = data;
    tc.in_data_len = sizeof(data);
    tc.in_data_is_already_padded = (tc.in_data_len % 16)==0; // Hard coded 16 as the cipher's block size
    tc.in_key = key1;
    tc.in_key_len = sizeof(key1);
    memset(ivec, 0x00, EVP_MAX_IV_LENGTH);
    tc.in_ivec = ivec;

#if defined(OPENSSL_NO_SM4)
    have_sm4 = 0;
#endif
    if (have_sm4)
    {
        printf("[1]\n");
        printf("Debug: EVP_sm4_ecb() test\n");
        test_encrypt_with_cipher(&tc, EVP_sm4_ecb());
    }
#if defined(OPENSSL_NO_AES)
    have_aes = 0;
#endif
    if (have_aes)
    {
        printf("[2]\n");
        printf("Debug: EVP_aes_128_ecb() test\n");
        test_encrypt_with_cipher(&tc, EVP_aes_128_ecb());
    }
}

假定当前是把main.c放在 openssl-1.1.1-pre5/文件夹内
gcc -Iinclude -c main.c
gcc main.o libcrypto.so -o a.out

export LD_LIBRARY_PATH=`pwd`
ldd a.out

./a.out

---

9.1. GM/T OIDs
9.1.1. SCA OID Prefix
All SM4 GM/T OIDs belong under the "1.2.156.10197" OID prefix,
registered by the Chinese Cryptography Standardization Technology
Committee ("CCSTC"), a committee under the SCA. Its components are
described below in ASN.1 notation.