我在VirtualBox上使用虚拟机instant-veins-4-7-1-i1
与Omnet++-5.3
和Sumo-0.32.0
。
我已经安装了库openssl
1.1.0版。当我尝试访问使用函数ECDSA_SIG
存储签名的struct ECDSA_SIG_get0
时,模拟突然终止,出现以下错误
这是生成错误的代码片段:
ECDSA_SIG * signed_hash;
s->generateSignature(message, messageLength, signed_hash);
const BIGNUM **pr;
const BIGNUM **ps;
ECDSA_SIG_get0(signed_hash, pr, ps);
generateSignature
功能代码是:
void SignatureOpenSSL::generateSignature(const unsigned char* message, int messageLength, ECDSA_SIG * signed_hash)
{
unsigned char *md;
unsigned char *hash;
hash = SHA256(message, messageLength, md);
// Computes the ECDSA signature of the given message using the supplied private key and returns the created signature
signed_hash = ECDSA_do_sign(hash, 32, eckey);
if (signed_hash == NULL){
std::cout <<" ko signature " << std::endl;
}else{
std::cout <<" ok signature" << std::endl;
}
}
我已将openssl
库升级到1.1.1版,但错误仍在继续。
我究竟做错了什么?
谢谢
你的问题与openssl无关,而是你的“C”代码和你滥用指针。
你的问题是:
signed_hash = ECDSA_do_sign(hash, 32, eckey);
你的代码假定它正在改变调用函数中的指针,但事实并非如此。它只是改变了指针的“副本”。您想要返回指针或传入指向指针的指针并将其设置为该方式。
EG
ECDSA_SIG *SignatureOpenSSL::generateSignature(const unsigned char* message, int messageLength)
{
...
ECDSA_SIG * signed_hash = ECDSA_do_sign(hash, 32, eckey);
...
return signed_hash;
}
ECDSA_SIG * signed_hash = s->generateSignature(message, messageLength);
要么
void SignatureOpenSSL::generateSignature(const unsigned char* message, int messageLength, ECDSA_SIG ** signed_hash)
{
...
*signed_hash = ECDSA_do_sign(hash, 32, eckey);
if (*signed_hash == NULL){
std::cout <<" ko signature " << std::endl;
}else{
std::cout <<" ok signature" << std::endl;
}
}
ECDSA_SIG * signed_hash;
s->generateSignature(message, messageLength, &signed_hash);