feat: added ssh_passphrase for encrypted private key auth

Dockerfile

@@ -2,7 +2,7 @@
 FROM alpine:3.18
 
 # Install required packages in one RUN statement to reduce image layers
-RUN apk update && apk add --no-cache rsync sshpass openssh
+RUN apk update && apk add --no-cache rsync sshpass openssh expect
 
 # Copy entrypoint script and set correct permissions
 COPY entrypoint.sh /entrypoint.sh

README.md

@@ -20,8 +20,9 @@
 | `sftp_only`            | no       |         | If your port only accepts the sftp protocol, set this option to `true`. However, when set to `true`, the remote folder won't be automatically created. |
 | `sftpArgs`            | no       |         | Extra arguments you want to pass to `sftp`, for example: `-o ConnectTimeout=5`                                       |
 | `delete_remote_files`  | no       | false   | Set to `true` to delete the remote path folder and all files in it **before** uploading.                             |
-| `password`             | no       |         | SSH password. If a password is set, `ssh_private_key` is ignored. *(for @v1.2.4 and greater)*                        |
+| `password`             | no       |         | SSH password. If a password is set, `ssh_private_key` and `ssh_passphrase` is ignored. *(for @v1.2.4 and greater)*                        |
 | `rsyncArgs`            | no       |         | Additional arguments for the `rsync` command. You can customize file synchronization behavior, such as excluding files or directories. Example: `--exclude=node_modules --exclude=.git --exclude=*.log`. *(for @v1.2.5 and greater)* |
+| `ssh_passphrase`           | no       |         | The passphrase for encrypted ssh private-key |
 
 > ⚠️ **Warning:**  
 > Be careful when using `delete_remote_files`. This will **permanently delete** the remote path folder and all files in it **before** uploading.
@@ -108,6 +109,31 @@ jobs:
           password: ${{ secrets.FTP_PASSWORD }}
 ```
 
+
+### **🔹 Example with Encrypted Private Key Authentication**
+```yaml
+on: [push]
+
+jobs:
+  deploy_job:
+    runs-on: ubuntu-latest
+    name: Deploy with Password
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Deploy with Password
+        uses: wlixcc/SFTP-Deploy-Action@v1.2.5
+        with:
+          username: ${{ secrets.FTP_USERNAME }}
+          server: ${{ secrets.FTP_SERVER }}
+          port: ${{ secrets.FTP_PORT }}
+          local_path: './static/*'
+          remote_path: '/var/www/app'
+          sftp_only: true
+          ssh_private_key:  ${{ secrets.SSH_PRIVATE_KEY }}
+          ssh_passphrase: ${{ secrets.SSH_PASSPHRASE }}
+```
 ---
 
 ## 🌐 **3. [Deploy React App Example](https://github.com/wlixcc/React-Deploy)**

action.yml

@@ -43,7 +43,9 @@ inputs:
       If set, these arguments will be passed directly to the rsync command."
     required: false
     default: ""
-
+  ssh_passphrase:
+    description: "Passphrase for ssh encrypted private-key. If the private-key is not encrypted, this parameter is not required."
+    required: false
 
 runs:
   using: 'docker'
@@ -60,6 +62,7 @@ runs:
     - ${{ inputs.delete_remote_files }}
     - ${{ inputs.password }}
     - ${{ inputs.rsyncArgs }}  
+    - ${{ inputs.ssh_passphrase }}  
 
 
 branding:

entrypoint.sh

@@ -83,6 +83,20 @@ else
   ssh -o StrictHostKeyChecking=no -p $3 -i $TEMP_SSH_PRIVATE_KEY_FILE $1@$2 mkdir -p $6
 fi
 
+# check if passphrase is set, if yes decrypt the private key
+if [ -n "${12}" ]; then
+  echo 'Use ssh-agent to decrypt private key with passphrase'
+  # start ssh agent
+  eval $(ssh-agent -s)
+  # use expect for ssh passphrase encryption
+  expect <<EOF
+    spawn ssh-add $TEMP_SSH_PRIVATE_KEY_FILE
+    expect "Enter passphrase"
+    send "${12}\r"
+    expect eof
+EOF
+fi
+
 echo 'SFTP Start'
 # create a temporary file containing sftp commands
 printf "%s" "put -r $5 $6" >$TEMP_SFTP_FILE
@@ -90,4 +104,11 @@ printf "%s" "put -r $5 $6" >$TEMP_SFTP_FILE
 sftp -b $TEMP_SFTP_FILE -P $3 $8 -o StrictHostKeyChecking=no -i $TEMP_SSH_PRIVATE_KEY_FILE $1@$2
 
 echo 'Deploy Success'
+# if passphrase is set stop ssh-agent after sftp connection
+if [ -n "${12}" ]; then
+  echo 'Clear keys from ssh-agent'
+  # delete all keys from RAM
+  ssh-add -D
+fi
+
 exit 0