0.3.0

New:
* Added validation of PrivateBin instance URL - #18 (it must contain trailing slash because POST is used)
* URL shortener support with various supported services - #19
* Shortener configuration, certificate validation and insecure warning settings can be configured in config file or via env

Changed:
* Restructured some parts of code by splitting big code chunks in funtions (encrypt/decrypt)
* Rework error messaging repeatable code (moved in utils)
* Reduce code duplication (requests session configuring)

Signed-off-by: r4sas <r4sas@i2pmail.org>

.gitattributes

@@ -0,0 +1,3 @@
+.gitattributes export-ignore
+.gitignore export-ignore
+README.md export-ignore

pbincli/__init__.py

@@ -2,6 +2,6 @@
 # -*- coding: utf-8 -*-
 
 __author__ = "R4SAS <r4sas@i2pmail.org>"
-__version__ = "0.2"
+__version__ = "0.3.0"
 __copyright__ = "Copyright (c) R4SAS"
 __license__ = "MIT"

pbincli/actions.py

@@ -1,14 +1,18 @@
 from pbincli.format import Paste
+from pbincli.utils import PBinCLIError
+
+def send(args, api_client, settings=None):
+    from pbincli.api import Shortener
+    if args.short:
+        shortener = Shortener(settings)
 
-def send(args, api_client):
     if not args.notext:
         if args.text:
             text = args.text
         elif args.stdin:
             text = args.stdin.read()
     elif not args.file:
-        print("Nothing to send!")
-        exit(1)
+        PBinCLIError("Nothing to send!")
     else:
         text = ""
 
@@ -60,29 +64,32 @@ def send(args, api_client):
             result['id'],
             passphrase,
             result['deletetoken'],
-            api_client.server,
+            settings['server'],
             result['id'],
             passphrase))
     elif result['status']: # return code is other then zero
-        print("Something went wrong...\nError:\t\t{}".format(result['message']))
-        exit(1)
+        PBinCLIError("Something went wrong...\nError:\t\t{}".format(result['message']))
     else: # or here no status field in response or it is empty
-        print("Something went wrong...\nError: Empty response.")
-        exit(1)
+        PBinCLIError("Something went wrong...\nError: Empty response.")
+
+    if args.short:
+        print("\nQuerying URL shortening service...")
+        shortener.getlink("{}?{}#{}".format(
+            settings['server'],
+            result['id'],
+            passphrase))
 
 
-def get(args, api_client):
+def get(args, api_client, settings=None):
     from pbincli.utils import check_writable, json_encode
 
     try:
         pasteid, passphrase = args.pasteinfo.split("#")
     except ValueError:
-        print("PBinCLI error: provided info hasn't contain valid PasteID#Passphrase string")
-        exit(1)
+        PBinCLIError("Provided info hasn't contain valid PasteID#Passphrase string")
 
     if not (pasteid and passphrase):
-        print("PBinCLI error: Incorrect request")
-        exit(1)
+        PBinCLIError("Incorrect request")
 
     if args.debug: print("PasteID:\t{}\nPassphrase:\t{}".format(pasteid, passphrase))
 
@@ -139,14 +146,12 @@ def get(args, api_client):
             api_client.delete(json_encode({'pasteid':pasteid,'deletetoken':'burnafterreading'}))
 
     elif result['status']: # return code is other then zero
-        print("Something went wrong...\nError:\t\t{}".format(result['message']))
-        exit(1)
+        PBinCLIError("Something went wrong...\nError:\t\t{}".format(result['message']))
     else: # or here no status field in response or it is empty
-        print("Something went wrong...\nError: Empty response.")
-        exit(1)
+        PBinCLIError("Something went wrong...\nError: Empty response.")
 
 
-def delete(args, api_client):
+def delete(args, api_client, settings=None):
     from pbincli.utils import json_encode
 
     pasteid = args.paste

pbincli/api.py

@@ -1,21 +1,29 @@
 import requests
+from requests import HTTPError
+from pbincli.utils import PBinCLIError
 
-class PrivateBin:
-    def __init__(self, server, settings=None):
-        self.server = server
-        self.headers = {'X-Requested-With': 'JSONHttpRequest'}
-
+def _config_requests(settings=None):
     if settings['proxy']:
-            self.proxy = {settings['proxy'].split('://')[0]: settings['proxy']}
+        proxy = {settings['proxy'].split('://')[0]: settings['proxy']}
     else:
-            self.proxy = {}
+        proxy = {}
 
-        if settings['noinsecurewarn']:
+    if settings['no_insecure_warning']:
         from requests.packages.urllib3.exceptions import InsecureRequestWarning
         requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
 
-        self.session = requests.Session()
-        self.session.verify = settings['nocheckcert']
+    session = requests.Session()
+    session.verify = not settings['no_check_certificate']
+
+    return session, proxy
+
+
+class PrivateBin:
+    def __init__(self, settings=None):
+        self.server = settings['server']
+        self.headers = {'X-Requested-With': 'JSONHttpRequest'}
+
+        self.session, self.proxy = _config_requests(settings)
 
     def post(self, request):
         result = self.session.post(
@@ -27,8 +35,7 @@ class PrivateBin:
         try:
             return result.json()
         except ValueError:
-            print("ERROR: Unable parse response as json. Received (size = {}):\n{}".format(len(result.text), result.text))
-            exit(1)
+            PBinCLIError("Unable parse response as json. Received (size = {}):\n{}".format(len(result.text), result.text))
 
 
     def get(self, request):
@@ -56,11 +63,9 @@ class PrivateBin:
         if not result['status']:
             print("Paste successfully deleted!")
         elif result['status']:
-            print("Something went wrong...\nError:\t\t{}".format(result['message']))
-            exit(1)
+            PBinCLIError("Something went wrong...\nError:\t\t{}".format(result['message']))
         else:
-            print("Something went wrong...\nError: Empty response.")
-            exit(1)
+            PBinCLIError("Something went wrong...\nError: Empty response.")
 
 
     def getVersion(self):
@@ -72,3 +77,172 @@ class PrivateBin:
                 'v' in jsonldSchema['@context'] and
                 '@value' in jsonldSchema['@context']['v']) \
             else 1
+
+class Shortener:
+    """Some parts of this class was taken from
+    python-yourls (https://github.com/tflink/python-yourls/) library
+    """
+    def __init__(self, settings=None):
+        self.api = settings['short_api']
+
+        # we checking which service is used, because some services doesn't require
+        # any authentication, or have only one domain on which it working
+        if self.api == 'yourls':
+            self._yourls_init(settings)
+        elif self.api == 'isgd' or self.api == 'vgd':
+            self._gd_init()
+
+        self.session, self.proxy = _config_requests(settings)
+
+
+    def _yourls_init(self, settings):
+        if not settings['short_url']:
+            PBinCLIError("YOURLS: An API URL is required")
+
+        # setting API URL
+        apiurl = settings['short_url']
+        if apiurl.endswith('/yourls-api.php'):
+            self.apiurl = apiurl
+        elif apiurl.endswith('/'):
+            self.apiurl = apiurl + 'yourls-api.php'
+        else:
+            PBinCLIError("YOURLS: Incorrect URL is provided.\n" +
+                "It must contain full address to 'yourls-api.php' script (like https://example.com/yourls-api.php)\n" +
+                "or just contain instance URL with '/' at the end (like https://example.com/)")
+
+        # validating for required credentials
+        if settings['short_user'] and settings['short_pass'] and settings['short_token'] is None:
+            self.auth_args = {'username': settings['short_user'], 'password': settings['short_pass']}
+        elif settings['short_user'] is None and settings['short_pass'] is None and settings['short_token']:
+            self.auth_args = {'signature': settings['short_token']}
+        elif settings['short_user'] is None and settings['short_pass'] is None and settings['short_token'] is None:
+            self.auth_args = {}
+        else:
+            PBinCLIError("YOURLS: either username and password or token are required. Otherwise set to default (None)")
+
+
+    def _gd_init(self):
+        if self.api == 'isgd':
+            self.apiurl = 'https://is.gd/'
+        else:
+            self.apiurl = 'https://v.gd/'
+        self.useragent = 'Mozilla/5.0 (compatible; pbincli - https://github.com/r4sas/pbincli/)'
+
+
+    def getlink(self, url):
+        # that is api -> function mapper for running service-related function when getlink() used
+        servicesList = {
+            'yourls': self._yourls,
+            'clckru': self._clckru,
+            'tinyurl': self._tinyurl,
+            'isgd': self._gd,
+            'vgd': self._gd,
+            'cuttly': self._cuttly
+        }
+        # run function selected by choosen API
+        servicesList[self.api](url)
+
+
+    def _yourls(self,url):
+        request = {'action': 'shorturl', 'format': 'json', 'url': url}
+        request.update(self.auth_args)
+
+        result = self.session.post(
+            url = self.apiurl,
+            proxies = self.proxy,
+            data = request)
+
+        try:
+            result.raise_for_status()
+        except HTTPError:
+            try:
+                response = result.json()
+            except ValueError:
+                PBinCLIError("YOURLS: Unable parse response. Received (size = {}):\n{}".format(len(result.text), result.text))
+            else:
+                PBinCLIError("YOURLS: Received error from API: {} with JSON {}".format(result, response))
+        else:
+            response = result.json()
+
+            if {'status', 'statusCode', 'message'} <= set(response.keys()):
+                if response['status'] == 'fail':
+                    PBinCLIError("YOURLS: Received error from API: {}".format(response['message']))
+                if not 'shorturl' in response:
+                    PBinCLIError("YOURLS: Unknown error: {}".format(response['message']))
+                else:
+                    print("Short Link:\t{}".format(response['shorturl']))
+            else:
+                PBinCLIError("YOURLS: No status, statusCode or message fields in response! Received:\n{}".format(response))
+
+
+    def _clckru(self, url):
+        request = {'url': url}
+
+        try:
+            result = self.session.post(
+                url = "https://clck.ru/--",
+                proxies = self.proxy,
+                data = request)
+            print("Short Link:\t{}".format(result.text))
+        except Exception as ex:
+            PBinCLIError("clck.ru: unexcepted behavior: {}".format(ex))
+
+
+    def _tinyurl(self, url):
+        request = {'url': url}
+
+        try:
+            result = self.session.post(
+                url = "https://tinyurl.com/api-create.php",
+                proxies = self.proxy,
+                data = request)
+            print("Short Link:\t{}".format(result.text))
+        except Exception as ex:
+            PBinCLIError("TinyURL: unexcepted behavior: {}".format(ex))
+
+
+    def _gd(self, url):
+        request = {
+            'format': 'json',
+            'url': url,
+            'logstats': 0 # we don't want use any statistics
+        }
+        headers = { 'User-Agent': self.useragent}
+
+        try:
+            result = self.session.post(
+                url = self.apiurl + "create.php",
+                headers = headers,
+                proxies = self.proxy,
+                data = request)
+
+            response = result.json()
+
+            if 'shorturl' in response:
+                print("Short Link:\t{}".format(response['shorturl']))
+            else:
+                PBinCLIError("{}: got error {} from API: {}".format(
+                    "is.gd" if self.api == 'isgd' else 'v.gd',
+                    response['errorcode'],
+                    response['errormessage']))
+
+        except Exception as ex:
+            PBinCLIError("{}: unexcepted behavior: {}".format(
+                "is.gd" if self.api == 'isgd' else 'v.gd',
+                ex))
+
+
+    def _cuttly(self, url):
+        request = {
+            'url': url,
+            'domain': 0
+        }
+
+        try:
+            result = self.session.post(
+                url = "https://cutt.ly/scripts/shortenUrl.php",
+                proxies = self.proxy,
+                data = request)
+            print("Short Link:\t{}".format(result.text))
+        except Exception as ex:
+            PBinCLIError("cutt.ly: unexcepted behavior: {}".format(ex))

pbincli/cli.py

@@ -3,7 +3,7 @@ import os, sys, argparse
 
 import pbincli.actions
 from pbincli.api import PrivateBin
-from pbincli.utils import PBinCLIException
+from pbincli.utils import PBinCLIException, validate_url
 
 CONFIG_PATHS = [os.path.join(".", "pbincli.conf", ),
        os.path.join(os.getenv("HOME") or "~", ".config", "pbincli", "pbincli.conf") ]
@@ -36,8 +36,19 @@ def main():
     send_parser.add_argument("-q", "--notext", default=False, action="store_true", help="don't send text in paste")
     send_parser.add_argument("-c", "--compression", default="zlib", action="store",
         choices=["zlib", "none"], help="set compression for paste (default: zlib). Note: works only on v2 paste format")
-    send_parser.add_argument("--no-check-certificate", default=True, action="store_false", help="disable certificate validation")
+    # URL shortener
+    send_parser.add_argument("-S", "--short", default=False, action="store_true", help="use URL shortener")
+    send_parser.add_argument("--short-api", default=argparse.SUPPRESS, action="store", choices=["tinyurl", "clckru", "isgd", "vgd", "cuttly", "yourls"], help="API used by shortener service")
+    send_parser.add_argument("--short-url", default=argparse.SUPPRESS, help="URL of shortener service API")
+    send_parser.add_argument("--short-user", default=argparse.SUPPRESS, help="Shortener username")
+    send_parser.add_argument("--short-pass", default=argparse.SUPPRESS, help="Shortener password")
+    send_parser.add_argument("--short-token", default=argparse.SUPPRESS, help="Shortener token")
+    # Connection options
+    send_parser.add_argument("-s", "--server", default=argparse.SUPPRESS, help="PrivateBin service URL (default: https://paste.i2pd.xyz/)")
+    send_parser.add_argument("-x", "--proxy", default=argparse.SUPPRESS, help="Proxy server address (default: None)")
+    send_parser.add_argument("--no-check-certificate", default=False, action="store_true", help="disable certificate validation")
     send_parser.add_argument("--no-insecure-warning", default=False, action="store_true", help="suppress InsecureRequestWarning (only with --no-check-certificate)")
+    #
     send_parser.add_argument("-d", "--debug", default=False, action="store_true", help="enable debug")
     send_parser.add_argument("--dry", default=False, action="store_true", help="invoke dry run")
     send_parser.add_argument("stdin", help="input paste text from stdin", nargs="?", type=argparse.FileType("r"), default=sys.stdin)
@@ -47,7 +58,7 @@ def main():
     get_parser = subparsers.add_parser("get", description="Get data from PrivateBin instance")
     get_parser.add_argument("pasteinfo", help="example: aabb#cccddd")
     get_parser.add_argument("-p", "--password", help="password for decrypting paste")
-    get_parser.add_argument("--no-check-certificate", default=True, action="store_false", help="disable certificate validation")
+    get_parser.add_argument("--no-check-certificate", default=False, action="store_true", help="disable certificate validation")
     get_parser.add_argument("--no-insecure-warning", default=False, action="store_true", help="suppress InsecureRequestWarning (only with --no-check-certificate)")
     get_parser.add_argument("-d", "--debug", default=False, action="store_true", help="enable debug")
     get_parser.set_defaults(func=pbincli.actions.get)
@@ -56,7 +67,7 @@ def main():
     delete_parser = subparsers.add_parser("delete", description="Delete paste from PrivateBin instance using token")
     delete_parser.add_argument("-p", "--paste", required=True, help="paste id")
     delete_parser.add_argument("-t", "--token", required=True, help="paste deletion token")
-    delete_parser.add_argument("--no-check-certificate", default=True, action="store_false", help="disable certificate validation")
+    delete_parser.add_argument("--no-check-certificate", default=False, action="store_true", help="disable certificate validation")
     delete_parser.add_argument("--no-insecure-warning", default=False, action="store_true", help="suppress InsecureRequestWarning (only with --no-check-certificate)")
     delete_parser.add_argument("-d", "--debug", default=False, action="store_true", help="enable debug")
     delete_parser.set_defaults(func=pbincli.actions.delete)
@@ -65,10 +76,23 @@ def main():
     args = parser.parse_args()
 
     CONFIG = {
-        "server": "https://paste.i2pd.xyz/",
-        "proxy": None
+        'server': 'https://paste.i2pd.xyz/',
+        'proxy': None,
+        'short_api': None,
+        'short_url': None,
+        'short_user': None,
+        'short_pass': None,
+        'short_token': None,
+        'no_check_certificate': False,
+        'no_insecure_warning': False
     }
 
+    # Configuration preference order:
+    # 1. Command line switches
+    # 2. Environment variables
+    # 3. Configuration file
+    # 4. Default values below
+
     for p in CONFIG_PATHS:
         if os.path.exists(p):
             CONFIG.update(read_config(p))
@@ -77,21 +101,21 @@ def main():
     for key in CONFIG.keys():
         var = "PRIVATEBIN_{}".format(key.upper())
         if var in os.environ: CONFIG[key] = os.getenv(var)
+        # values from command line switches are preferred
+        args_var = vars(args)
+        if key in args_var:
+            CONFIG[key] = args_var[key]
 
-    SETTINGS = {
-        "proxy": CONFIG["proxy"],
-        "nocheckcert": args.no_check_certificate,
-        "noinsecurewarn": args.no_insecure_warning
-    }
+    # Re-validate PrivateBin instance URL
+    CONFIG['server'] = validate_url(CONFIG['server'])
 
-    api_client = PrivateBin(CONFIG["server"], settings=SETTINGS)
+    api_client = PrivateBin(CONFIG)
 
     if hasattr(args, "func"):
         try:
-            args.func(args, api_client)
+            args.func(args, api_client, settings=CONFIG)
         except PBinCLIException as pe:
-            print("PBinCLI error: {}".format(pe))
-            sys.exit(1)
+            raise PBinCLIException("error: {}".format(pe))
     else:
         parser.print_help()
 

pbincli/format.py

@@ -1,7 +1,7 @@
 from Crypto.Random import get_random_bytes
 from Crypto.Cipher import AES
 from base64 import b64encode, b64decode
-from pbincli.utils import PBinCLIException
+from pbincli.utils import PBinCLIError
 import zlib
 
 CIPHER_ITERATION_COUNT = 100000
@@ -143,7 +143,7 @@ class Paste:
         elif self._version == 1:
             return zlib.decompress(bytearray(map(lambda c:ord(c)&255, b64decode(s.encode('utf-8')).decode('utf-8'))), -zlib.MAX_WBITS)
         else:
-            raise PBinCLIException('Unknown compression type provided in paste!')
+            PBinCLIError('Unknown compression type provided in paste!')
 
 
     def __compress(self, s):
@@ -160,13 +160,17 @@ class Paste:
             b = co.compress(s) + co.flush()
             return b64encode(''.join(map(chr, b)).encode('utf-8'))
         else:
-            raise PBinCLIException('Unknown compression type provided!')
+            PBinCLIError('Unknown compression type provided!')
 
 
     def decrypt(self):
-        from json import loads as json_decode
+        # that is wrapper which running needed function regrading to paste version
+        if self._version == 2: self._decryptV2()
+        else:                  self._decryptV1()
 
-        if self._version == 2:
+
+    def _decryptV2(self):
+        from json import loads as json_decode
         iv = b64decode(self._data['adata'][0][0])
         salt = b64decode(self._data['adata'][0][1])
         key = self.__deriveKey(salt)
@@ -186,13 +190,14 @@ class Paste:
         if 'attachment' in cipher_message and 'attachment_name' in cipher_message:
             self._attachment = cipher_message['attachment']
             self._attachment_name = cipher_message['attachment_name']
-        else:
+
+
+    def _decryptV1(self):
         from sjcl import SJCL
+        from json import loads as json_decode
 
         password = self.__preparePassKey()
-
         cipher_text = json_decode(self._data['data'])
-
         if self._debug: print("Text:\t{}\n".format(cipher_text))
 
         text = SJCL().decrypt(cipher_text, password)
@@ -215,8 +220,19 @@ class Paste:
 
 
     def encrypt(self, formatter, burnafterreading, discussion, expiration):
+        # that is wrapper which running needed function regrading to paste version
+        self._formatter = formatter
+        self._burnafterreading = burnafterreading
+        self._discussion = discussion
+        self._expiration = expiration
+
+        if self._version == 2: self._encryptV2()
+        else:                  self._encryptV1()
+
+
+    def _encryptV2(self):
         from pbincli.utils import json_encode
-        if self._version == 2:
+
         iv = get_random_bytes(CIPHER_TAG_BYTES)
         salt = get_random_bytes(CIPHER_SALT_BYTES)
         key = self.__deriveKey(salt)
@@ -233,9 +249,9 @@ class Paste:
                 'gcm',
                 self._compression
             ],
-                formatter,
-                int(burnafterreading),
-                int(discussion)
+            self._formatter,
+            int(self._discussion),
+            int(self._burnafterreading)
         ]
         cipher_message = {'paste':self._text}
         if self._attachment:
@@ -245,15 +261,16 @@ class Paste:
         cipher = self.__initializeCipher(key, iv, adata)
         ciphertext, tag = cipher.encrypt_and_digest(self.__compress(json_encode(cipher_message)))
 
-            self._data = {'v':2,'adata':adata,'ct':b64encode(ciphertext + tag).decode(),'meta':{'expire':expiration}}
+        self._data = {'v':2,'adata':adata,'ct':b64encode(ciphertext + tag).decode(),'meta':{'expire':self._expiration}}
 
-        else:
+
+    def _encryptV1(self):
         from sjcl import SJCL
+        from pbincli.utils import json_encode
 
-            self._data = {'expire':expiration,'formatter':formatter,'burnafterreading':int(burnafterreading),'opendiscussion':int(discussion)}
+        self._data = {'expire':self._expiration,'formatter':self._formatter,'burnafterreading':int(self._burnafterreading),'opendiscussion':int(self._discussion)}
 
         password = self.__preparePassKey()
-
         if self._debug: print("Password:\t{}".format(password))
 
         # Encrypting text
@@ -271,4 +288,3 @@ class Paste:
 
             self._data['attachment'] = json_encode(cipherfile)
             self._data['attachmentname'] = json_encode(cipherfilename)
-

pbincli/utils.py

@@ -1,9 +1,14 @@
-import json, ntpath, os
+import json, ntpath, os, sys
 
 class PBinCLIException(Exception):
     pass
 
 
+def PBinCLIError(message):
+    print("PBinCLI Error: {}".format(message), file=sys.stderr)
+    exit(1)
+
+
 def path_leaf(path):
     head, tail = ntpath.split(path)
     return tail or ntpath.basename(head)
@@ -12,14 +17,20 @@ def path_leaf(path):
 def check_readable(f):
     # Checks if path exists and readable
     if not os.path.exists(f) or not os.access(f, os.R_OK):
-        raise PBinCLIException("Error accessing path: {}".format(f))
+        PBinCLIError("Error accessing path: {}".format(f))
 
 
 def check_writable(f):
     # Checks if path is writable
     if not os.access(os.path.dirname(f) or ".", os.W_OK):
-        raise PBinCLIException("Path is not writable: {}".format(f))
+        PBinCLIError("Path is not writable: {}".format(f))
 
 
 def json_encode(s):
     return json.dumps(s, separators=(',',':')).encode()
+
+
+def validate_url(s):
+    if not s.endswith('/'):
+        s = s + "/"
+    return s