C 将BIGNUM转换为原始二进制文件
我想使用BIGNUM的BN_bn2bin函数将这个十六进制字符串转换成原始二进制文件C 将BIGNUM转换为原始二进制文件,c,ssl,openssl,bignum,C,Ssl,Openssl,Bignum,我想使用BIGNUM的BN_bn2bin函数将这个十六进制字符串转换成原始二进制文件 BN_hex2bn(&asn1hash, "3031300D060960864801650304020105000420BC5F9353CBB9DCAE86B9F8F68C1C95856DB836ACA2E00C9319716CDF4DD0F5BA"); char *buf = (unsigned char *)malloc(BN_num_bytes(asn1hash));
BN_hex2bn(&asn1hash, "3031300D060960864801650304020105000420BC5F9353CBB9DCAE86B9F8F68C1C95856DB836ACA2E00C9319716CDF4DD0F5BA");
char *buf = (unsigned char *)malloc(BN_num_bytes(asn1hash));
BN_bn2bin(asn1hash, buf);
FILE *fp;
fp = fopen("ASn1Hash","wb+");
fputs(buf, fp);
fclose(fp);
但是为什么只有“30 31 30 0D 06 09 60 86 48 01 65 03 04 02 01 05”被输出到文件中?谢谢修复了代码
BN_hex2bn(&asn1hash, "3031300D060960864801650304020105000420BC5F9353CBB9DCAE86B9F8F68C1C95856DB836ACA2E00C9319716CDF4DD0F5BA");
int num_bytes = BN_num_bytes(asn1hash);
char *buf = (unsigned char *)malloc(num_bytes);
BN_bn2bin(asn1hash, buf);
FILE *fp;
fp = fopen("ASn1Hash","wb+");
fwrite(buf, 1, num_bytes, fp);
fclose(fp);
fputs
不是这里工作的最佳工具。它对字符串进行操作,不处理二进制数据。查看05
之后的字节,并思考fputs
将如何处理该字节。