crypt-maker

Use node.js crypt api for make encrypted messages. Works sync.

Class documentation by jsDuck.

There also is documentation on rus.

Install with:

npm install crypt-maker

Usage

Simple example:

    var CM = require("crypt-maker");
    var crypt = new CM({key: 'some-crypt-key'});

    var messageJSON = {
        header: {
            some: 'header',
            another: 'awesome header'
        },
        body: {
            time: '11:22',
            whisp: 'do this' 
        }
    };
    
    var encrypted = crypt.makeMessage(messageJSON);
    
    console.log(encrypted);
    //{"some":"header","another":"awesome header"}
    //a4d355b6522d3d69baca7ff06310f24c992b0fa83ca6ae43e0f7e83340a001e618af6e48e1fb9fca63181acc8162f520
    
    var decrypted = {header: crypt.getHeader(encrypted), body: crypt.getBody(encrypted)};
    console.log(decrypted);
    //{ header: { some: 'header', another: 'awesome header' },
    //  body: { time: '11:22', whisp: 'do this' } }
    var decryptedAll = crypt.parseMessage(encrypted);
    console.log(decryptedAll);

Methods

CM.createCryptMaker()

Is the same as:

new CM()

• CM.createCryptMaker({key: '123'}) = crypt.createCryptMaker({key: '123', algorithm:'aes123', EOM:'\r\n\r\n', SOP:'\r\n'})

If algorithm !== 'no' and no key passed to constructor - throws error (EmptyKeyError)

• key: key to crypt strings
• algorithm: which algorithm use to encrypt messages. Default aes128
• EOM: which symbols indicate ends of messages. Default \r\n\r\n
• SOP: which symbols indicate separate between header and message. Default \r\n
• headerEncrypted: true if header should encrypted. Default false

cm.decrypt(str)

Return decrypted string. If algorithm == 'no' returns str.

Parameters:

Name | Type | Description ----------|--------|------------------ str | String | string to decrypt

cm.encrypt(str)

Return encrypted string. If algorithm == 'no' returns str.

Parameters:

Name | Type | Description ------|--------|------------------ str | String | string to encrypt

cm.format(messagePart) Deprecated

Make string from JSON with message part.

Parameters:

Name | Type | Description --------------|----------------------|------------- messagePart | any, except function |

cm.parse(messagePart) Deprecated

Unformat message part back to Object | Boolean | String | Number.

Parameters:

Name | Type | Description --------------|--------|------------ messagePart | String |

cm.getBody(message)

Get body from encrypted message. If typeof message == undefined || message length == 0 or no SOP at message, returns null. Else if can't parse message - return null.

Parameters:

Name | Type | Description ----------|--------|-------------------- message | String | encrypted message

cm.getBodyAsync(message, callback) Deprecated

Same as sync version. But doesn't return null, and returns error objects. Is not realy async!

Parameters:

Name | Type | Description -----------|----------|------------------ message | String | encrypted message callback | Function |

cm.getHeader(message)

Get header from encrypted message. If typeof message == undefined || message.length == 0 or no SOP at message, returns null. Else if can't parse message - return null.

Parameters:

Name | Type | Description ----------|--------|-------------------- message | String | encrypted message

cm.getHeaderAsync(message, callback) Deprecated

Same as sync version. But doesn't return null, and returns error objects. Is not really async!

Parameters:

Name | Type | Description ----------|----------|------------------ message | String | encrypted message callback| Function |

cm.makeMessage(message[, body])

Make encrypt message form object. If body is defined - message should be header of message.

Parameters:

Name | Type | Description ----------------|---------|---------------- message | Object | Message object. If body is not defined - should be header object. message.header| Object | Header of message. Only if body parameter is not defined. message.body | Object | Body of message. Only if body parameter is not defined. body | Object | Optional. If defined - body of message.

cm.makeMessageAsync(message, callback) Deprecated

Same as sync version. But doesn't return null, and returns error objects. Is not really async!

Parameters:

Name | Type | Description -----------------|----------|---------------- message | Object | Message object. message.header | Object | Header of message. message.body | Object | Body of message. callback | Function | Callback function.

cm.parseMessage(message)

Decrypt message form object. Returns Object like {header: ... , body: ... }

Parameters:

Name | Type | Description ----------|--------|---------------- message | String |

cm.splitMessages(raw)

Splits many messages to array of messages.

Parameters:

Name | Type | Description ------|--------|-------------------- raw | String | raw messages string

Returns: return [] if no EOMs at the end of raw strings

cm.splitMessagesForce(raw)

Splits many massages at raw string to array. Last element is tail of raw string. If some message was not fully emitted - it will be this element. If all messages are entire it will be ''.

Parameters:

Name | Type | Description --------|--------|--------------------- raw | String | raw messages string

Returns: return [message1, message2, message3, ... , tail('' or part of messageN)] tail is '' if last message fully emitted.

cm.splitMessagesAsync(raw, callback) Deprecated

Splits many messages to array.

Parameters:

Name | Type | Description -----------|----------|--------------- raw | String | messages callback | Function |

Returns: return [] if no EOMs at the end of raw strings

cm.addEom(string) Deprecated

Add EOM symbol to string if there is not EOM at the end.

Parameters:

Name | Type | Description ---------|--------|---------------------- string | String | one encrypted message

Returns: return string+EOM or string.

cm.replaceHeader(header, message)

Replace header of message to new.

Parameters:

Name | Type | Description -----------|--------|------------------------- header | Object | new header for message message | String | encrypted message

Returns: return message with new header.

LICENSE - "MIT License"

Copyright (c) 2015 Konstantine Petryaev

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.