OTS-Share (One-Time Secret Share)

A self-hosting app to share secrets only one-time.

Content

• Features
• How to run
  • With the default database
  • Without the default database
  • Access UI
• Request and response
  • Request
  • Response
• How to use
  • For text
  • For files
  • View secret content in the shared link
  • Errors
• CLI usage
• Change configurations
  • Change database server
  • Change the default server port
  • Change the purge process interval
• Tech stack
• Using with deploy tools
  • With https://www.portainer.io/
• Format of the generated URL
• Road map
• Todo

Features

• Support both texts and small files (maximum 1MB).
• Creates shareable links which valid for a maximum of 24 hours.
• The contents are encrypted with AES in CBC mode, with a 256-bit key. (Using Crypto-js)
• Passwords are NOT sent to the backend server.
• The app periodically deletes encrypted content after it expires, and the encrypted content gets deleted once the web UI fetches it.
• CLI support.
• Multiple database connectivity support.
  • Mongo
  • Postgres
  • MySQL

How to run

With the default database

This application is entirely run in Docker and comes with Mongo 4.2 image. (view the docker-compose.yml for further reference.)

To execute this app, simply run following command.

make start

Without the default database

This application can connect to a external database. (Currently support Postgres and Mysql).

To execute this app, simply run following command.

# Set the connection string to your database.
export DB_URL=mysql://root:root@host.docker.internal:3306/ots_share

make start-no-db

OR

Change the modify the DB_URL variable under ots-share-run-no-db service in docker-compose.yml, and then run

make start-no-db

Access UI

After that, the application is accessible via http://localhost:8282

Request and Response

Request

Create record request body

A sample request body is as follows.

{
  "content": "U2FsdGVkX1+XUedzb2748LeKmf9UpN9hVWjBDUwJfXs=",
  "expireIn": {
    "value": 10,
    "unit": "minutes"
  }
}

Property	type	is required	purpose
content	string	yes	Encrypted content
expireIn	object	yes	Expiration configurations
expireIn.value	number	yes	numerical value of expiration. E,g 1, 2
expireIn.unit	enum ('days', 'hours')	yes	Unit of expiration.

• Sample Create request.

curl 'http://localhost:8282/api/record' -H 'Content-Type: application/json' \
 --data-raw \
 '{
    "content" : "U2FsdGVkX1+bozD8VjexiUeHJ3BfdxrXCmRyai8V0hY=",
    "expireIn": {
      "value": 1,
      "unit": "minutes"
    }
  }'
--compressed

• Sample GET request.

curl 'http://localhost:8282/api/record/b2nC422huavXfMs2DWZ2Z9' -H 'Content-Type: application/json'

Response

A sample record body is as follows.

{
  "id": "iN2jS3y1pstio7JVXs1zLF",
  "slug": "iN2jS3y1pstio7JVXs1zLF",
  "content": "U2FsdGVkX1+XUedzb2748LeKmf9UpN9hVWjBDUwJfXs=",
  "expiary": "2023-02-12T14:55:41.510Z",
  "status": "avaiable",
  "created_at": "2023-02-12T14:45:41.521Z"
}

Property	type	is required	purpose
id	string	yes	Primary key of the record
slug	string	yes	For future use (Primary key of the record)
content	string	yes	Encrypted content
expiary	string (Date)	yes	Expiration date and time
status	enum ('avaiable', 'unavaiable')	yes	For future use.
created_at	string (Date)	yes	Record created date

How to use

(Please don't lose the generated URL. There is no way to retrieve the content or regenerate the URL !!!)

For text

1. Visit the landing page and select Text from top menu.
2. Add your secret content to the Secret content text box.

3. Click the Create Button.
4. Copy the URL in the text box. (Click the Copy Icon).

• (Please don't lose the generated URL. There is no way to retrieve the content or regenerate the URL !!!)

5. Send the copied URL to the other party via a secure channel.

For files

1. Visit the landing page and select File from top menu.
2. Click on the "Drag 'n' drop" area or drag and drop a file.

• (Pleas refer to screen regarding the file size limits).

  

3. Upload a file.

4. Click the Create Button.

5. Copy the URL in the text box. (Click the Copy Icon).

• (Please don't lose the generated URL. There is no way to retrieve the content or regenerate the URL !!!)

5. Send the copied URL to the other party via a secure channel.

View secret content in the shared link.

1. Visit the shared link using a browser.
2. You will see the following screen.
3. Click Fetch Content.

For text

4. You'll see the following screen.

5. Click the "Click there to view the content".

6. You will see the content as follows.

For files

4. You'll see the following screen.

5. Click the "Click here to download the file" button to download the file.

Errors.

In case of an error, the following screen will appear.

CLI usage

• Support only for texts.

• You can use the CLI to utilize APIs.

• Encryption using CLI

Sample CLI to use encryption

#!/bin/bash

# Configs
PASSWORD="pass-key"
OTS_SHARE_DOMIN="http://host.docker.internal:8282"

OTS_SHARE_API="$OTS_SHARE_DOMIN/api/record"

OPENSSL_PARAMETERS_PASSWORD="-pass pass:$PASSWORD"
OPENSSL_PARAMETERS_ALGORITHM="-base64 -aes-256-cbc -pbkdf2"

text_to_encrypt="test string to encrypt"

################
## Encryption ##
################

# Record expiration value. A numerical value
RECORD_EXPIRATION_VALUE=10
# Record expiration unit. It can be "minutes" or "hours"
RECORD_EXPIRATION_UNIT="minutes"

# 1. Generate encrypted string
encrypted_content=$(echo $text_to_encrypt | openssl enc -e $OPENSSL_PARAMETERS_ALGORITHM $OPENSSL_PARAMETERS_PASSWORD)

# 2. Make API call OTS-Share and retrieve the Id
# We need this id for encryption
record_id=$(\
curl -s "$OTS_SHARE_API" \
-H 'Content-Type: application/json' \
--data-raw \
'{ "content" : "'$encrypted_content'", "expireIn": { "value": '$RECORD_EXPIRATION_VALUE', "unit": "'$RECORD_EXPIRATION_UNIT'" }}' \
--compressed \
| jq '.id' \
| tr -d '"' \
)
#### Encryption results
echo "!!! Keep these safe !!!"
echo "-----------------------------------"
echo "Record id: $record_id"
echo "Password: $PASSWORD"
echo "-----------------------------------"
echo "(This record will expires in: $RECORD_EXPIRATION_VALUE $RECORD_EXPIRATION_UNIT)"

Output encryption

!!! Keep these safe !!!
-----------------------------------
Record id: b2nC422huavXfMs2DWZ2Z9
Password: pass-key
-----------------------------------
(This record will expires in: 10 minutes)

• Decryption using CLI

Sample CLI to use Decryption

#!/bin/bash

# Configs
PASSWORD="pass-key"
OTS_SHARE_DOMIN="http://host.docker.internal:8282"

OTS_SHARE_API="$OTS_SHARE_DOMIN/api/record"

OPENSSL_PARAMETERS_PASSWORD="-pass pass:$PASSWORD"
OPENSSL_PARAMETERS_ALGORITHM="-base64 -aes-256-cbc -pbkdf2"

$record_id="b2nC422huavXfMs2DWZ2Z9" # ID from previous encryption operation

################
## DECRYPTION ##
################

# 1. Fetch content
content=$(\
curl "$OTS_SHARE_API/$record_id" \
-s -H 'Content-Type: application/json' \
--compressed \
| jq '.content' \
| tr -d '"' \
)

# 2. Decrypt
decrypted_content=$(echo $content | openssl enc -d $OPENSSL_PARAMETERS_ALGORITHM $OPENSSL_PARAMETERS_PASSWORD)

echo "-----------------------------------"
echo "Content: $decrypted_content"
echo "-----------------------------------"

Output decryption

-----------------------------------
Content: test string to encrypt
-----------------------------------

Change configurations

All the configurations are mentioned in the docker-compose.yml under or ots-share-run-no-db service.

• Change default port to access the application are available in docker-compose.yml under ots-share-run or ots-share-run-no-db service.
• You can modify the mongo-local service in docker-compose.yml to keep the data persistent.

Change database server.

• Please change the DEV_PORT variable the docker-compose.yml under ots-share-run or ots-share-run-no-db service.

• Please change the DEV_PORT variable the docker-compose.yml under ots-share-run-no-db service to connect to external database.

• DB_URL must be a connection string.

  • The app parse the DB_URL as an URL and use the protocol to identify the database driver.
  • sample connection strings:
    • mongodb://mongo-local/ots-share - for Mongo
    • postgres://db:db@host.docker.internal:5432/ots_share - for Postgres
    • mysql://root:root@host.docker.internal:3306/ots_share - for MySQL

Change the default server port.

• Please change SERVER_PORT variable in the in docker-compose.yml under ots-share-run or ots-share-run-no-db service.

Change the purge process interval.

• Default value is 1 minute.
• Please set PURGE_TRIGGER_INTERVAL variable in the in docker-compose.yml under ots-share-run or ots-share-run-no-db service.
• The PURGE_TRIGGER_INTERVAL value must be in milliseconds.

Tech stack

• UI:

  • React
  • Material UI

• Server:

  • Typescript
  • Node
  • Express

• DB support:

  • MongoDB - (default DB)
  • Postgres
  • MySQL

Using with deploy tools

With https://www.portainer.io/

• Step 1 & 2.

• Step 3.

• Press Deploy the stack to deploy.

Format of the generated URL

The URL format, which required sending to the other party, is as follows. The id received from the backend API gets concatenated with the password. After that, the contaminated string gets encoded into Base 58.

The format is as follows.

• <hosted-domain>/r/Base58Encoded(id-from-api : password : type : file-name)
• Possible values for type is 'text' or 'file'.
• type and file-name is optional.
• type is default to text if not mentioned.
• file-name is available for file.
• It supports Base 64 encoding.

Road map

• A Chrome extension
• A Slack app

Todo

• Add Contribution instructions.
• Learn more ReactJs. 😄
• Fix any bugs. 😄