树莓派openeuler安装openssl及其实践

树莓派openssl实践

安装openssl源码

安装地址：openssl-3.0.0

建立两个文件夹，分别放置OpenSSL的源码和安装路径：
mkdir rocopensslsrc rocopenssl

使用scp D:/树莓派/openssl-3.0.0.tar.gz root@192.168.184.124:/root/rocopenssl将源码传输至树莓派中

解压源代码到rocopensslsrc文件夹:
tar -zxvf openssl-3.0.0.tar.gz -C /root/rocopensslsrc

配置编译安装路径(/root/rocopenssl)，和openEuler系统默认的不同。

cd rocopensslsrc/openssl-3.0.0
./config --prefix=/root/rocopenssl

编译（make时间稍长，耐心等待），测试、安装,其中测试步骤可选：

make
make test
make install

make了快一个小时

查看openssl

使用openssl version查看openssl版本

openssl help查看openssl帮助文档：

---

openssl计算摘要

把besti放到besti.txt文件中,计算文件的摘要：

echo "besti" >> besti.txt

---

OpenSSL编程

简单测试,编写一个测试代码test_openssl.c：

#include <stdio.h>
#include <openssl/evp.h>

int main(){
	
    OpenSSL_add_all_algorithms();
	
    return 0;
}

使用以下指令编译:gcc -o to test_openssl.c -I /root/rocopenssl/include -L /root/rocopenssl/lib -lcrypto -lpthread

<openssl/evp.h>头文件缺失，openeuler系统传统艺能了。

sudo yum install openssl-devel使用该指令安装相关文件：

编译成功：

执行./to;echo $?,结果打印0.

---

BASE64算法

#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>
#include <openssl/x509.h>

void tEVP_Encode()
{
	EVP_ENCODE_CTX *ctx;
        ctx = EVP_ENCODE_CTX_new();	
	unsigned char in[1024];			
	int inl;						
	char out[2048]={0};				
	int outl;						
	FILE *infp;						
	FILE *outfp;					

	infp = fopen("test.dat","rb");
	if(infp == NULL)
	{
		printf("Open File \"Test.dat\"  for Read Err.\n");
		return;
	}
	
	outfp = fopen("test.txt","w");
	if(outfp == NULL)
	{
		printf("Open File \"test.txt\" For Write Err.\n");
		return;
	}
	EVP_EncodeInit(ctx);
	printf("file\"Test.dat\" after Base64 coding：\n");

	while(1)
	{
		inl = fread(in,1,1024,infp);
		if(inl <= 0)
			break;
		EVP_EncodeUpdate(ctx,out,&outl,in,inl);
		fwrite(out,1,outl,outfp);
		printf("%s",out);
	} 
	EVP_EncodeFinal(ctx,out,&outl);
	fwrite(out,1,outl,outfp);
	printf("%s",out);
	fclose(infp);
	fclose(outfp);	
	printf("file \"Test.dat\" Base64 coding is finish，save to \"test.txt\"文件.\n\n\n");
}

void tEVP_Decode()
{
	EVP_ENCODE_CTX *ctx;
        ctx = EVP_ENCODE_CTX_new();			
	char in[1024];					
	int inl;						
	unsigned char out[1024];		
	int outl;						
	FILE *infp;						
	FILE *outfp;					
	
	infp = fopen("test.txt","r");
	if(infp == NULL)
	{
		printf("Open File \"Test.txt\"  for Read Err.\n");
		return;
	}
	outfp = fopen("test-1.dat","wb");
	if(outfp == NULL)
	{
		printf("Open File \"test-1.txt\" For Write Err.\n");
		return;
	}
	EVP_DecodeInit(ctx);
	printf("start file \"Test.txt\" Base64 decoding...\n\n");

	while(1)
	{
		inl = fread(in,1,1024,infp);
		if(inl <= 0)
			break;
		EVP_DecodeUpdate(ctx,out,&outl,in,inl);
		fwrite(out,1,outl,outfp);
	} 
	EVP_DecodeFinal(ctx,out,&outl);
	fwrite(out,1,outl,outfp);
	fclose(infp);
	fclose(outfp);	
	printf("file \"Test.txt\" Base64 decoding is finish，save as \"test-1.dat\"\n\n\n");
	
}
 
int main()
{
 
	tEVP_Encode();
	tEVP_Decode();
	
	return 0;
}

使用gcc -o testbase64 testbase64.c -I /root/rocopenssl/include -L /root/rocopenssl/lib -lcrypto -lpthread
编译成功：

运行截图：