openssl c library

Target: Many Android phones already have their own OpenSSL library, libssl.so, libcrypto.so, the following example implements the APK call to the OpenSSL library function Pkcs5_pbkdf2_hmac (key generation algorithm) through the NDK1) Create a JNI directory in Android project2) Edit Abcjni.javaPackage com.example;public

This article transferred from: http://kb.cnblogs.com/page/94467/OpenSSL is a security protocol that provides security and data integrity for network communications, encompassing key cryptographic algorithms, common key and certificate encapsulation management functions, and SSL protocols, and provides a rich range of applications for testing or other purposes.First download the OpenSSL package: (http://www.

0. Introduced by a mistake The code is as follows: Fatal error:openssl/aes.h:no such file or directory If you encounter this error at compile time, this may be the following reason: The program you are trying to compile uses OpenSSL, but the files (libraries and headers) that need to be linked with OpenSSL are missing on your Linux platform. To solve this problem, you need to install the

the MD5 encryption tool in the OpenSSL library can encrypt the input string and output a 16-byte number. The test code is as follows:1 //test_md5.c2#include 3#include string.h>4#include 5#include 6 7 intMd5_test (void*idata, size_t len, unsignedChar*MD5)8 {9 md5_ctx CTX;Ten One if(idata = = NULL | | Len 0|| MD5 = =NULL) { Aprintf"Input param invalid!\n"); - return-1; - } the -memset (ctx,0

This document draws on the files on the Internet and makes some modifications on its own. It mainly solves some problems caused by inconsistencies and not details during the test. OpenSSL Installation Centos Yum install OpenSSL-devel # Include Compile and check. You need to link the OpenSSL library. Gcc-lcrypto mai

 On the Linux machine, there is a command to calculate the MD5 value of the file, that is md5sum, if not, you need to install the RPM package: Coreutils. Now we can also easily compute the MD5 value of the file using the OpenSSL library. The main function to use is int Md5_init (Md5_ctx *c);int Md5_update (md5_ctx *c, const void *data, size_t len);int md5_final (unsigned char *md, md5_ctx *c); Before usi

# Cross-compiling OpenSSL ------Modify makefile directlyAdd this line:Cross_compile = arm-unknown-Linux-gnueabi-Go to the following linesCc = cc to CC = $ (cross_compile) GCCGo to the following linesAR = ar $ (arflags) rRanlib =/usr/bin/ranlibChangeAR = $ (cross_compile) Ar $ (arflags) rRanlib = $ (cross_compile) ranlibModify the installation path and locate the following two lines:Installtop =/usr/local/SSLOpenssldir =/usr/local/SSLChanged to the act

Original introduction of OpenSSL OpenSSL is currently the most popular SSL password library tool, it provides a universal, robust, full-featured tool suite to support the implementation of the SSL/TLS protocol.Official website: https://www.openssl.org/source/ composing partial cipher algorithm library key and certifi