Public keys and entrypoint arguments

Dockerfile

@@ -17,4 +17,4 @@ RUN mv sshd_config /etc/ssh/sshd_config && \
 
 EXPOSE 22
 
-CMD ["./run"]
+ENTRYPOINT ["./run"]

README.md

@@ -6,11 +6,10 @@ Easy to use SFTP (*SSH File Transfer Protocol*) server.
 Usage
 -----
 
-- Define users and passwords in comma separated list with SFTP_USERS  
-  (syntax: `user:pass[:e][:[uid][:gid]][,...]`).
-  - You must set custom UID and/or GID for your users if you want them to make
-    changes to your mounted volumes with permissions matching your host
-    filesystem.
+- Define users as last arguments to `docker run`, one user per argument  
+  (syntax: `user:pass[:e][:[uid][:gid]]`).
+  - You must set custom UID for your users if you want them to make changes to
+    your mounted volumes with permissions matching your host filesystem.
 - Mount volumes in user's home folder.
   - The users are chrooted to their home directory, so you must mount the
     volumes in separate directories inside the user's home directory
@@ -23,41 +22,43 @@ Examples
 
 ```
 docker run \
-    -e SFTP_USERS='foo:123' \
-    -v "/host/share:/home/foo/share" \
-    -p 2222:22 -d atmoz/sftp
+    -v /host/share:/home/foo/share \
+    -p 2222:22 -d atmoz/sftp \
+    foo:123:1001
 ```
 
 ### Multiple users and volumes
 
 ```
 docker run \
-    -e SFTP_USERS='foo:123,bar:abc' \
-    -v "/host/share:/home/foo/share" \
-    -v "/host/documents:/home/foo/documents" \
-    -v "/host/http:/home/bar/http" \
-    -p 2222:22 -d atmoz/sftp
-```
-
-### Custom UID and GID
-
-```
-SFTP_USERS='foo:123:1001:100'
-```
-
-Only custom GID:
-
-```
-SFTP_USERS='foo:123::100'
+    -v /host/share:/home/foo/share \
+    -v /host/documents:/home/foo/documents \
+    -v /host/http:/home/bar/http \
+    -p 2222:22 -d atmoz/sftp \
+    foo:123:1001 \
+    bar:abc:1002
 ```
 
 ### Encrypted password
 
-Add `:e` behind password to mark it as encrypted:
+Add `:e` behind password to mark it as encrypted. Use single quotes.
 
 ```
-SFTP_USERS='foo:$1$0G2g0GSt$ewU0t6GXG15.0hWoOX8X9.:e:1001:100'
+docker run \
+    -v /host/share:/home/foo/share \
+    -p 2222:22 -d atmoz/sftp \
+    'foo:$1$0G2g0GSt$ewU0t6GXG15.0hWoOX8X9.:e:1001'
 ```
 
 Tip: you can use makepasswd to generate encrypted passwords:  
 `echo -n 123 | makepasswd --crypt-md5 --clearfrom -`
+
+### Use public key (without password)
+
+```
+docker run \
+    -v /host/id_rsa.pub:/public_keys/foo:ro \
+    -v /host/share:/home/foo/share \
+    -p 2222:22 -d atmoz/sftp \
+    foo::1001
+```

run

@@ -1,9 +1,8 @@
 #!/bin/bash
 
-# Add users (user:pass[:e][:[uid][:gid]][,...])
-IFS=',' read -a users <<< "$SFTP_USERS"
-for userData in "${users[@]}"; do
-    IFS=':' read -a data <<< "$userData"
+for users in "$@"; do
+    # user:pass[:e][:[uid][:gid]]
+    IFS=':' read -a data <<< "$users"
     user="${data[0]}"
     pass="${data[1]}"
 
@@ -27,10 +26,30 @@ for userData in "${users[@]}"; do
     fi
 
     useradd $useraddParams "$user"
-    echo "$user:$pass" | chpasswd $chpasswdParams
     chown root:root /home/$user
     chmod 755 /home/$user
+
+    if [ -z "$pass" ]; then
+        # just make a very long and random password
+        pass="$(echo `</dev/urandom tr -dc A-Za-z0-9 | head -c256`)"
+    fi
+
+    echo "$user:$pass" | chpasswd $chpasswdParams
+
+#    if [ -f /home/$user/.ssh/authorized_keys ]; then
+#        chown -R $user:users /home/$user/.ssh
+#        chmod 400 /home/$user/.ssh/authorized_keys
+#    fi
 done
 
-# Run SSH
-/usr/sbin/sshd -D
+cd /public_keys
+for user in *; do
+    if id -u $user >/dev/null 2>&1; then
+        mkdir -p /home/$user/.ssh
+        cp $user /home/$user/.ssh/authorized_keys
+        chown $user:users /home/$user/.ssh/authorized_keys
+    fi
+done
+cd /root
+
+exec /usr/sbin/sshd -D