hex2bn在openSSL中的神奇分段故障EN###1、下载openssl源码 https://www.openssl.org/source/ ###2...
int BN_bn2bin(const BIGNUM *a, unsigned char *to);将abs(a)转化为字符串存入to,to的空间必须大于BN_num_bytes(a) BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret);将s中的len位的正整数转化为大数 char *BN_bn2hex(const BIGNUM *a);转化为16进制字符串 char *BN_bn2dec...
OpenSSL是一种开放源码的SSL实现,用来实现网络通信的高强度加密,现在被广泛地用于各种网络应用程序中。 OpenSSL 1.0.2及更早版本、1.0.1及更早版本在函数BN_hex2bn/BN_dec2bn的实现上存在安全漏洞,可导致空指针间接引用及堆破坏等问题。 漏洞来源: Guido Vranken 解决方案: 临时解决方法: 如果不能及时安装补丁,...
openssl生成随机数 #include<stdio.h>#include<openssl/bn.h>intmain(){ BIGNUM *bn; bn = BN_new();//生成一个BIGNUM结构intbits =20;inttop =-1;intbottom =1; BN_rand(bn, bits, top, bottom);//生成指定bits的随机数char*a = BN_bn2hex(bn);//转化成16进制字符串puts(a); BN_free(bn)...
bignum = ASN1_INTEGER_to_BN(asn1_i, NULL); if (bignum == NULL) { ulRet = CERT_ERR_FAILED; goto FREE_MEMORY; } serial = BN_bn2hex(bignum); if (serial == NULL) { ulRet = CERT_ERR_FAILED; goto FREE_MEMORY; } BN_free(bignum); ...
CVE-2017-3739: BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption CVE-2017-3740: BN_mod_inverse with odd modulus produces incorrect results CVE-2017-3732: Potential timing side channel in DSA signature generation 请注意,这只是其中的一部分漏洞列表,不一定是全部的漏洞列表。如果您需要更详细的...
#include <openssl/bn.h> int main() { BIGNUM *bn; bn = BN_new(); //生成一个BIGNUM结构 int bits = 20; int top = -1; int bottom = 1; BN_rand(bn, bits, top, bottom); //生成指定bits的随机数 char *a = BN_bn2hex(bn); //转化成16进制字符串 ...
(dl,d2) =kR。 (mll,m22)=(Rldl_1(mod p), R2d2_1(mod p))即为解密所得数据,与原加密数据(ml,m2)相同。 (2)OpenSSL实现Menezes-Vanstone算法主要代码 //加密操作,对( ml,m2)在有限域zp内赋随意值如下 BN.hex2bn(&ml,”3A2794482D6410697 C85 FA4643BAI DAEA76 FFAE6EC26A2C8"); ...
("证书序列号: %s ", BN_bn2hex(ASN1_INTEGER_to_BN(serial, NULL))); printf("证书中使用的签名算法: %s ", OBJ_nid2ln(OBJ_obj2nid(cert->sig_alg->algorithm))); printf("颁发者: %s ", X509_NAME_oneline(X509_get_issuer_name(cert), NULL, 0)); printf("使用者: %s ", ...
but it is insufficiently sized leading to heap corruption. A similar issue exists in BN_dec2bn. This could have security consequences if BN_hex2bn/BN_dec2bn is ever called by user applications with very large untrusted hex/dec data. This is anticipated to be a rare occurrence. All OpenSS...