# 安装 libsodium 使用 salsa20 或 chacha20 或 chacha20-ietf 算法

- Link: https://www.xuepaijie.com/html/skill/devops/907.html
- Published: 2017-03-21T16:39:10+08:00
- Author: Admin

谷歌发布了针对ARM优化的新算法，但是如果要使用 salsa20 或 chacha20 或 chacha20-ietf
算法，还是需要先安装 libsodium 。

CentOS下：

    ```shell;
    yum install epel-release -y
    yum install libsodium -y
    ```

如果想自己编译，那么可以用以下的命令：

    ```shell;
    #CentOS

    yum -y groupinstall "Development Tools"
    wget https://github.com/jedisct1/libsodium/releases/download/1.0.12/libsodium-1.0.12.tar.gz
    tar xf libsodium-1.0.12.tar.gz && cd libsodium-1.0.12
    ./configure && make -j2 && make install
    echo /usr/local/lib > /etc/ld.so.conf.d/usr_local_lib.conf
    ldconfig

    #Ubuntu/Debian：

    apt-get install build-essential -y
    wget https://github.com/jedisct1/libsodium/releases/download/1.0.12/libsodium-1.0.12.tar.gz
    tar xf libsodium-1.0.12.tar.gz && cd libsodium-1.0.12
    ./configure && make -j2 && make install
    ldconfig
    ```

如果曾经安装过旧版本，亦可重复用以上步骤更新到最新版，仅1.0.4或以上版本支持chacha20-
ietf。

假如我们遇到以下的错误时：

    ```shell;
    xxx: In function `crypto_derive_key':undefined reference to `crypto_pwhash'
    xxx: In function `cipher_aead_decrypt':undefined reference to `crypto_aead_xchacha20poly1305_ietf_decrypt'
    xxx: In function `cipher_aead_encrypt':undefined reference to `crypto_aead_xchacha20poly1305_ietf_encrypt'
    collect2: error: ld returned 1 exit status
    make[2]: *** [xxx] Error 1
    make[2]: Leaving directory `xxx'
    make[1]: *** [xxx] Error 1
    make[1]: Leaving directory `xxx'
    make: *** [all] Error 2
    ```

其实这原因有二：

1.系统存在旧libsodium的缘故，试试apt-get purge libsodium-dev再试试编译

2.尝试在编译时添加路径： ./configure –with-sodium=xxx