Android JNI Aes加密

/* * AES 加密工具类 * Created by mazaiting on 2018/7/3. */ #include <jni.h> #include <cstring> #include <android/log.h> //#include "openssl/evp.h" #include <openssl/evp.h> #include <openssl/buffer.h> #define TAG "AES_CPP" #define LOGD(FORMAT, ...) __android_log_print(ANDROID_LOG_DEBUG,TAG,FORMAT,##__VA_ARGS__); // 命名空间 //using namespace std; extern "C" { // 初始化key const unsigned char *_key = (const unsigned char *) "0123456789012345"; // 初始化iv const unsigned char *_iv = (const unsigned char *) "0123456789012345"; /** * Use EVP to Base64 encode the input byte array to readable text */ char *base64(const unsigned char *inputBuffer, int inputLen) { EVP_ENCODE_CTX ctx; int base64Len = (((inputLen + 2) / 3) * 4) + 1; // Base64 text length // int pemLen = base64Len + base64Len/64; // PEM adds a newline every 64 bytes char *base64 = new char[base64Len]; int result; EVP_EncodeInit(&ctx); EVP_EncodeUpdate(&ctx, (unsigned char *) base64, &result, (unsigned char *) inputBuffer, inputLen); EVP_EncodeFinal(&ctx, (unsigned char *) &base64[result], &result); return base64; } /** * Use EVP to Base64 decode the input readable text to original bytes */ char *unbase64(char *input, int length) { EVP_ENCODE_CTX ctx; int orgLen = (((length + 2) / 4) * 3) + 1; char *orgBuf = new char[orgLen]; int result, tmpLen; EVP_DecodeInit(&ctx); EVP_DecodeUpdate(&ctx, (unsigned char *) orgBuf, &result, (unsigned char *) input, length); EVP_DecodeFinal(&ctx, (unsigned char *) &orgBuf[result], &tmpLen); result += tmpLen; return orgBuf; } JNIEXPORT jobjectArray JNICALL Java_com_mazaiting_aesdemo_Encrypt_setValues(JNIEnv *env, jclass type) { // 待加密的数据 const unsigned char *vItem = (const unsigned char *) "mazaiting"; // 源数据长度 int inLen = (int) strlen((const char *) vItem); // 加密长度 int encLen = 0; // 输出长度 int outlen = 0; // 加密数据长度 unsigned char encData[1024] = {0}; LOGD("source: %s\n", vItem); // 创建加密上下文 EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new(); // 初始化加密上下文 EVP_CipherInit_ex(ctx, EVP_aes_256_ecb(), NULL, _key, _iv, 1); // 加密数据 EVP_CipherUpdate(ctx, encData, &outlen, vItem, inLen); // 拼接长度 encLen = outlen; // 结束加密 EVP_CipherFinal(ctx, encData + outlen, &outlen); // 拼接 encLen += outlen; // 释放 EVP_CIPHER_CTX_free(ctx); // base64编码 char *baseEnc = base64(encData, encLen); LOGD("encrypted : %s\n", baseEnc); // base64解码 char *encData1 = unbase64(baseEnc, (int) strlen(baseEnc)); // 解密长度 int decLen = 0; // 解码数据长度 outlen = 0; // 解码后的数据 unsigned char decData[1024]; // 创建解密上下文 EVP_CIPHER_CTX *ctx2 = EVP_CIPHER_CTX_new(); // 初始化解密 EVP_CipherInit_ex(ctx2, EVP_aes_256_ecb(), NULL, _key, _iv, 0); // 执行解密 EVP_CipherUpdate(ctx2, decData, &outlen, (const unsigned char *) encData1, encLen); // 设置长度 decLen = outlen; // 结束解密 EVP_CipherFinal(ctx2, decData + outlen, &outlen); // 拼接长度 decLen += outlen; // 释放 EVP_CIPHER_CTX_free(ctx2); // 设置字符串结尾标识 decData[decLen] = '\0'; LOGD("decrypt: %s\n", decData); } }