# JCryptor

**Repository Path**: dingfeng/JCryptor

## Basic Information

- **Project Name**: JCryptor
- **Description**: Android JNI 加密解密
- **Primary Language**: Android
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2018-11-15
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# JCryptor

#### 项目介绍
Android JNI 加密解密，支持签名验证、aes加密。

#### 使用说明

```
Cryptor.encrypt(Context, String);

Cryptor.decrypt(Context, String)
```

#### 注意事项

- 修改包名和签名文件hashcode

```
# verify_signature.h

static const char *app_packageName = "com.jeff.jcryptor"; // app packageName
static const int app_signature_hash_code = -290654028; // keyStore hashCode
```

- 自定义签名规则

```
# cryptor-jni.cpp

jbyteArray getAESKey(JNIEnv *env) {
    int length = sizeof(AES_KEY) / sizeof(AES_KEY[0]);
    if (DEBUG) LOGD("AES_KEY length = %d", length);
    if (length <= 0)
        return NULL;

    jbyteArray key = env->NewByteArray(length);
    jbyte tmp[length];

    for (int i = 0; i < length; ++i) {
        jbyte b = AES_KEY[i] * i + i; // 自定义key规则，提高安全性
        tmp[i] = b;
    }
    env->SetByteArrayRegion(key, 0, length, tmp);

    return key;
}
```