在Linux

Question

我遇到一个让我疯狂的奇怪问题！ 手头的任务是在第一次登录“root”用户期间启动一组文件，在第二次登录同一用户期间启动另一组文件。我决定使用“.profile”和“.bashrc”文件，并在第一次登录时发生的任务结束时重新加载“.bashrc”文件。

在首次登录期间，我创建了一个私钥和证书签名请求，并调用API来获取证书。我将此证书和私钥存储在文件位置，然后修改“.bashrc”以调用第二组文件，这些文件利用此证书和密钥对要运行的应用程序进行身份验证。

问题是证书和密钥被覆盖并在首次启动后随机变为空。我已附上以下代码供您审核。

第一套文件

“。个人资料”脚本

# .bash_profile
umask 022
if [ -f ~/.bashrc ]; then
    source ~/.bashrc
fi

“。bashrc”script

/myFolder/backgroundTask1.sh &
/myFolder/certificateGenerator.sh

backgroundTask1.sh脚本

pipe=/myFolder/testpipe
if [[ ! -p $pipe ]]; then
    mkfifo $pipe
fi

while true
do
    ## Do some status LED blinking task here
done &

while true
do
    if read line < $pipe; then
        if [[ "$line" == 'success' ]]; then
           ## Kill the background LED blinking task created in the above while loop
           kill $!
           rm $pipe
           exit
        elif [[ "$line" == 'failed' ]]; then
           kill $!
           rm $pipe
           exit
        fi
    fi
done

certificateGenerator.sh脚本

请注意我修改BASHRC SCRIPT的最后几条线

还请注意文件/anotherFolder/myKey.key和/ anotherFolder/myCert.crt

#!/bin/bash
## Named pipe location for communicating to backgroundTask1
pipe=/myFolder/testpipe
openssl req -new -newkey rsa:2048 -nodes -out certificateSigningRequest.csr -keyout /anotherFolder/myKey.key -subj "/C=myCountry/ST=myState/L=myCity/O=myCompany/OU=myOU/CN=myDevice"
cert_req=$(<$certificateSigningRequest.csr)

## Get AD token from Azure for talking to my custom API hosted on Azure
response=$(curl -o - -s -w "%{http_code}\n" -X POST \
    https://login.microsoftonline.com/myCompany.onmicrosoft.com/oauth2/token \
    -H 'content-type: application/x-www-form-urlencoded' \
    -d 'grant_type=client_credentials&resource=https%3A%2F%2Fmanagement.core.windows.net%2F&client_id=myClientID&client_secret=mySecret')
if [ $?==0 ]; then
    status=$(echo $response | tail -c 4)
    body=${response::-3}
    token=$(echo $body | jq -r '.access_token')
fi

## Send CSR to my custom API to get certificate
response=$(jq -n --arg csr "$cert_req" \
             '{
                 cert: {
                     csr: $csr
                 }
             }' |
         curl -o - -s -w "%{http_code}\n" -X POST \
             https://myCustomAPI.azurewebsites.net/api/v1/customEndpoint \
             -H "authorization: Bearer $token" \
             -H "content-type: application/json" \
             -d @-
)        

## Parse the response to find out if the request succeeded
if [ $?==0 ]; then
    destCertDir=/anotherFolder/myCert.crt
    status=$(echo $response | tail -c 4)
    body=${response::-3}
    cert=$(echo $body | jq -r '.certificate')
    if [ "$status" == "$http_success" ]; then
        echo "$cert" > "$destCertDir"
        ## Change .bashrc for next boot
        echo '/myFolder/backgroundTask2.sh &' > ~/.bashrc
        echo '/myFolder/applicationAuthenticator.sh' >> ~/.bashrc
        echo "success" > $pipe
        exit
    fi
fi

第二套文件

“。个人资料”脚本

# .bash_profile
umask 022
if [ -f ~/.bashrc ]; then
    source ~/.bashrc
fi

“。bashrc”script

/myFolder/backgroundTask2.sh &
/myFolder/applicationAuthenticator.sh

backgroundTask2.sh脚本

pipe=/myFolder/testpipe2
if [[ ! -p $pipe ]]; then
    mkfifo $pipe
fi

while true
do
    ## Do some status LED blinking task here
done &

while true
do
    if read line < $pipe; then
        if [[ "$line" == 'success' ]]; then
           ## Kill the background LED blinking task created in the above while loop
           kill $!
           rm $pipe
           exit
        elif [[ "$line" == 'failed' ]]; then
           kill $!
           rm $pipe
           exit
        fi
    fi
done

applicationAuthenticator.sh脚本

请注意我如何修改BASHRC从下一次重新开始正常启动到本文的结尾

#!/bin/bash
## Named pipe location for communicating to backgroundTask2
pipe=/myFolder/testpipe2

response=$(curl https://myProduct/myCustomAPI.com \
           --cert /anotherFoler/myCert.crt --key /anotherFolder/myKey.key \
           -H 'Content-Type: application/x-www-form-urlencoded; charset=utf-8' \
           -d 'data=xxx')
if [[ $response == 204 ]; then
    echo '' > ~/.bashrc
    echo "success" > $pipe
    exit
else
    echo "failed" > $pipe
    exit
fi

问题 即使第一组文件创建了密钥和证书，它们也会在第一次重启后被覆盖为NULL。

为了确保它们在重启之前存在，我转到“/ anotherFolder”位置并检查文件。他们在重启之前拥有完整的密钥和证书。当我重新启动并看到脚本失败时，相同的密钥和证书文件（在重新启动之前有实际数据）现在具有NULL值。