首页 > 代码库 > Android jni aes加解密,实现文件的加解密,具体实现可以自行修改,上面的代码为简单介绍,下面的是JNI端实现文件加解密,可以修改为字符串加解密

Android jni aes加解密,实现文件的加解密,具体实现可以自行修改,上面的代码为简单介绍,下面的是JNI端实现文件加解密,可以修改为字符串加解密

2024-07-08 19:08:21   227人阅读

#include "aes.h"#include "modes.h"#include "e_os2.h"#include "aes_locl.h"#include "opensslconf.h"AES_KEY aes;//aes cbc模式加解密用到的向量unsigned char iv[AES_BLOCK_SIZE];for (i = 0; i < AES_BLOCK_SIZE; i++) {   iv[i] = 0;}//设置aes加密的key和加密的长度AES_set_encrypt_key(key, 128, &aes);//开始aes加密，注意作为cbc加密向量会改变AES_cbc_encrypt((unsigned char*) string, encryptString, lenBuff, &aes, iv,AES_ENCRYPT);

JNIEXPORT jstring JNICALL Java_com_encrypt_EncryptActivity_aesEncryptFile(        JNIEnv *env, jobject, jstring pathorg, jstring pathnow) {    int len;    char *buff;    const char *filepathorg;    const char *filepathnow;    filepathorg = env->GetStringUTFChars(pathorg, 0);    filepathnow = env->GetStringUTFChars(pathnow, 0);    AES_KEY aes;    unsigned int i;    //aes加密所输入的字符串    unsigned char *inputString;    //aes加密后字符串指针    unsigned char *encryptString;    FILE* file = fopen(filepathorg, "rb+");    if (file) {        fseek(file, 0L, SEEK_END);        len = ftell(file);        buff = (char *) malloc((len + 1) * sizeof(char));        memset(buff, 0, len + 1);        fseek(file, 0L, SEEK_SET);        fread(buff, 1, len + 1, file);        fclose(file);        //计算字符串的长度，如果不是16字节的倍数扩展为16字节的倍数        if ((len) % AES_BLOCK_SIZE == 0) {            //len = len + 1;        } else {            len = ((len) / AES_BLOCK_SIZE + 1) * AES_BLOCK_SIZE;        }        //为输入字符串分配空间        inputString = (unsigned char*) calloc(len + 1, sizeof(unsigned char));        memset(inputString, 0, len + 1);        //为aes加密后字符串分配空间        encryptString = (unsigned char*) calloc(len + 1, sizeof(unsigned char));        memset(encryptString, 0, len + 1);        //将从java段接收到的字串拷贝到加密输入字串中，注意类型不一致        memcpy((char*) inputString, buff, len + 1);        //设置加密向量，该值为加密初始值        for (i = 0; i < AES_BLOCK_SIZE; i++) {            iv[i] = 0;        }        //设置aes加密的key和加密的长度        AES_set_encrypt_key(key, 128, &aes);        //开始aes加密，注意作为cbc加密向量会改变        AES_cbc_encrypt((unsigned char*) inputString, encryptString, len, &aes,                iv, AES_ENCRYPT);        FILE* filew = fopen(filepathnow, "wb");        if (filew) {            fwrite(encryptString, 1, len, filew);            fclose(filew);        } else {            return env->NewStringUTF("Filed to create file!");        }    } else {        return env->NewStringUTF("Filed to read file!");    }    //释放出从java端接收的字符串    env->ReleaseStringUTFChars(pathorg, filepathorg);    env->ReleaseStringUTFChars(pathnow, filepathnow);    return 0;}

 

1.aes加解密 采用openssl开源库进行处理
2.将核心ase的代码取出aes_core.cpp,aes.h,aes_locl.h,e_os2.h,modes.h,opensslconf.h
3.上述文件是openssl Aes加密的核心代码,如下介绍的是aes cbc模式的加密方式,AES_ENCRYPT该值设为AES_DECRYPT则为解密,iv向量初始化加解密必须一致

该代码只是简写,需要按照正常C或者C++格式书写

资源下载:Android jni aes base64加解密
http://192.210.60.138/dz/forum.php?mod=viewthread&tid=4&fromuid=1
(出处: IStudy)

 


联系
我们