Comments (3)
sm2加密需要支持长数据加密+1
from gmssl.
实际上GmSSL设计时考虑了这个需求,默认就不必须做DER编码。SM2_KEY
, SM2_SIGNATURE
和 SM2_CIPHERTEXT
这几个类型的内部数据已经做了序列化了,可以直接复制到内存里或者复制到文件里,即使在大小端不同的CPU之间传输也不会出现错误。
from gmssl.
实际上GmSSL设计时考虑了这个需求,默认就不必须做DER编码。
SM2_KEY
,SM2_SIGNATURE
和SM2_CIPHERTEXT
这几个类型的内部数据已经做了序列化了,可以直接复制到内存里或者复制到文件里,即使在大小端不同的CPU之间传输也不会出现错误。
可是源码里面并没有直接将SM2_CIPHERTEXT 暴露给用户,用户还是需要阅读和修改源码才能得到非der编码的数组,不妨给函数参数加一个控制der编码的标志位,控制输出数组中的内容是否是der编码过的。并且还是希望1、sm2加密需要支持长数据加密;2、对私钥的加密也可关闭;3、sm4 EBC加密(虽然我已经实现了);
int sm2_encrypt(const SM2_KEY *key, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen)
{
SM2_CIPHERTEXT C;
if (!key || !in || !out || !outlen) {
error_print();
return -1;
}
if (!inlen) {
error_print();
return -1;
}
if (sm2_do_encrypt(key, in, inlen, &C) != 1) {
error_print();
return -1;
}
*outlen = 0;
if (sm2_ciphertext_to_der(&C, &out, outlen) != 1) {
error_print();
return -1;
}
return 1;
}
from gmssl.
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from gmssl.