Question

我想从模数和指数加载一个rsa密钥。但我找不到什么错误。返回代码为零，OpenSSL主页中的文档中没有规范。我想使用gdb进行调试，但是在main函数退出后进行核心转储。所以任何人都可以帮助我。我已经喝了几个星期了。

#include <openssl/rsa.h>
#include <openssl/engine.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <string.h>

/*
*publicexponent
*/

const char* public_exp = "65537";
const char* priv_exp = "00992ba89ce7cafcc2213192ca6d7cee60cae934a7fb50f394892c62c09e4dae53c362960ceff295be188c    1e2bf7b9949be539bbab716906b35976e9c2104eace225f51c3e79138c9a49855b638ddea9bc01b028bac45    7632068e740c7f7a5661dd7f6e8db64e2fd212857485f863244cc4f8cf3596b50773c08357a7c040863fce8    e506c5f52553d544f762caba378f1202798957be8e4182722daee062f5105aea2a1930f01baf54753051534    a6db6fd409d439381e003a591dea3db456ce30970d58e6d4102ac09dcbb2c1983b9f295e2e45bf090dc6f8a    d0813857aae51ae80abebde5b027b4537e67fa280517c6f70e605b6639dfc74c3c69066e33d56401";
const char *mod = "00ba015fe5f824e84e77b4f4f9da8ab844467acc8c2e6a538335d0b26b52b82f84acffbdbd641b0bd7d7ab    dcbf0f6ef19b0729375a7485d8367ea503d661610f080efc717b95d4765019a6c4c45028565865e947c63a8    6d4044eaa5bc16cd2d4ada4911e5ea1f4c6de8e31de1b3d7c24ba320f584c588ae73db3943d417def0984d8    7b8a1d5f140bde6ff20de89c55ecb160a429da46f82f57c2e5ca354a673784900fbd2b3e318e200083250cb    b6722c6b44fb03cc7e865a685a72e8daadd0f8b33706dd1a34be342a45f40efa4b8914052ae91d7028e8f83    c1749cf2fae280b5d91165c108a6e7729b2f685b21b7765f9ce7f9798e0c26d9b8c9d37019813515";

int main() {
    RSA *rsa = RSA_new();
    rsa->p = NULL;
    rsa->q = NULL;
    rsa->dmp1 = NULL;
    rsa->dmp1 = NULL;
    rsa->iqmp = NULL;

    BIGNUM *public_exp_bn = BN_new();
    BN_dec2bn(&public_exp_bn, public_exp);
    rsa->e = public_exp_bn;

    BIGNUM *priv_exp_bn = BN_new();
    BN_hex2bn(&priv_exp_bn, priv_exp);
    rsa->d = priv_exp_bn;

    BIGNUM *mod_bn = BN_new();
    BN_hex2bn(&mod_bn, mod);
    rsa->n = mod_bn;

    unsigned char *plain_txt = (unsigned char*)"hello world!";
    unsigned char cipher[128] = {0};

    int cipher_len = RSA_public_encrypt(strlen((char*)plain_txt), plain_txt, cipher,     rsa, RSA_PKCS1_PADDING);
    RSA_free(rsa);
}

这是gdb错误：

(gdb)
*** stack smashing detected ***: /mnt/c/Users/rq868/Desktop/openssl/a.out terminated

Program received signal SIGABRT, Aborted.
0x00007ffffec15428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
54      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.

Answer 1

加密数据的大小将是模数的大小，在您的情况下它将是256个字节，但传递给RSA_public_encrypt以收集加密输出的变量大小只有128个字节，这可能会缓冲溢出。

您还需要检查您的mod和exp数据，因为它们有空格。

从模数和指数加载rsa密钥，加密字符串，然后加载核心转储

1 个答案: