559 lines
25 KiB
Python
559 lines
25 KiB
Python
import json
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import time
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import re
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import os
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import copy
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import gevent
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from Debug import Debug
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from Crypt import CryptHash
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from Config import config
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class ContentManager(object):
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def __init__(self, site):
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self.site = site
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self.log = self.site.log
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self.contents = {} # Known content.json (without files and includes)
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self.loadContent(add_bad_files=False)
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self.site.settings["size"] = self.getTotalSize()
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# Load content.json to self.content
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# Return: Changed files ["index.html", "data/messages.json"]
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def loadContent(self, content_inner_path="content.json", add_bad_files=True, load_includes=True):
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content_inner_path = content_inner_path.strip("/") # Remove / from begning
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old_content = self.contents.get(content_inner_path)
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content_path = self.site.storage.getPath(content_inner_path)
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content_path_dir = self.toDir(self.site.storage.getPath(content_inner_path))
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content_dir = self.toDir(content_inner_path)
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if os.path.isfile(content_path):
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try:
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new_content = json.load(open(content_path))
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except Exception, err:
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self.log.error("%s load error: %s" % (content_path, Debug.formatException(err)))
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return False
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else:
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self.log.error("Content.json not exist: %s" % content_path)
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return False # Content.json not exist
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try:
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# Get the files where the sha512 changed
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changed = []
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for relative_path, info in new_content.get("files", {}).items():
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if "sha512" in info:
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hash_type = "sha512"
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else: # Backward compatiblity
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hash_type = "sha1"
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new_hash = info[hash_type]
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if old_content and old_content["files"].get(relative_path): # We have the file in the old content
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old_hash = old_content["files"][relative_path].get(hash_type)
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else: # The file is not in the old content
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old_hash = None
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if old_hash != new_hash:
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changed.append(content_dir + relative_path)
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# Load includes
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if load_includes and "includes" in new_content:
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for relative_path, info in new_content["includes"].items():
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include_inner_path = content_dir + relative_path
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if self.site.storage.isFile(include_inner_path): # Content.json exists, load it
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success = self.loadContent(include_inner_path, add_bad_files=add_bad_files)
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if success:
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changed += success # Add changed files
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else: # Content.json not exist, add to changed files
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self.log.debug("Missing include: %s" % include_inner_path)
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changed += [include_inner_path]
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# Load blind user includes (all subdir)
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if load_includes and "user_contents" in new_content:
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for relative_dir in os.listdir(content_path_dir):
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include_inner_path = content_dir + relative_dir + "/content.json"
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if not self.site.storage.isFile(include_inner_path):
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continue # Content.json not exist
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success = self.loadContent(include_inner_path, add_bad_files=add_bad_files, load_includes=False)
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if success:
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changed += success # Add changed files
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# Update the content
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self.contents[content_inner_path] = new_content
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except Exception, err:
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self.log.error("Content.json parse error: %s" % Debug.formatException(err))
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return False # Content.json parse error
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# Add changed files to bad files
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if add_bad_files:
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for inner_path in changed:
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self.site.bad_files[inner_path] = True
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if new_content["modified"] > self.site.settings.get("modified", 0):
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# Dont store modifications in the far future (more than 10 minute)
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self.site.settings["modified"] = min(time.time() + 60 * 10, new_content["modified"])
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return changed
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# Get total size of site
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# Return: 32819 (size of files in kb)
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def getTotalSize(self, ignore=None):
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total_size = 0
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for inner_path, content in self.contents.iteritems():
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if inner_path == ignore:
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continue
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total_size += self.site.storage.getSize(inner_path) # Size of content.json
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for file, info in content.get("files", {}).iteritems():
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total_size += info["size"]
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return total_size
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# Find the file info line from self.contents
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# Return: { "sha512": "c29d73d...21f518", "size": 41 , "content_inner_path": "content.json"}
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def getFileInfo(self, inner_path):
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dirs = inner_path.split("/") # Parent dirs of content.json
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inner_path_parts = [dirs.pop()] # Filename relative to content.json
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while True:
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content_inner_path = "%s/content.json" % "/".join(dirs)
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content = self.contents.get(content_inner_path.strip("/"))
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if content and "files" in content: # Check if content.json exists
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back = content["files"].get("/".join(inner_path_parts))
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if back:
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back["content_inner_path"] = content_inner_path
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return back
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if content and "user_contents" in content: # User dir
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back = content["user_contents"]
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# Content.json is in the users dir
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back["content_inner_path"] = re.sub("(.*)/.*?$", "\\1/content.json", inner_path)
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return back
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# No inner path in this dir, lets try the parent dir
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if dirs:
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inner_path_parts.insert(0, dirs.pop())
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else: # No more parent dirs
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break
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# Not found
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return False
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# Get rules for the file
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# Return: The rules for the file or False if not allowed
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def getRules(self, inner_path, content=None):
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if not inner_path.endswith("content.json"): # Find the files content.json first
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file_info = self.getFileInfo(inner_path)
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if not file_info:
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return False # File not found
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inner_path = file_info["content_inner_path"]
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dirs = inner_path.split("/") # Parent dirs of content.json
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inner_path_parts = [dirs.pop()] # Filename relative to content.json
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inner_path_parts.insert(0, dirs.pop()) # Dont check in self dir
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while True:
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content_inner_path = "%s/content.json" % "/".join(dirs)
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parent_content = self.contents.get(content_inner_path.strip("/"))
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if parent_content and "includes" in parent_content:
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return parent_content["includes"].get("/".join(inner_path_parts))
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elif parent_content and "user_contents" in parent_content:
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return self.getUserContentRules(parent_content, inner_path, content)
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else: # No inner path in this dir, lets try the parent dir
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if dirs:
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inner_path_parts.insert(0, dirs.pop())
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else: # No more parent dirs
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break
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return False
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# Get rules for a user file
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# Return: The rules of the file or False if not allowed
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def getUserContentRules(self, parent_content, inner_path, content):
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user_contents = parent_content["user_contents"]
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user_address = re.match(".*/([A-Za-z0-9]*?)/.*?$", inner_path).group(1) # Delivered for directory
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try:
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if not content:
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content = self.site.storage.loadJson(inner_path) # Read the file if no content specified
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except (Exception, ): # Content.json not exist
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return {"signers": [user_address], "user_address": user_address} # Return information that we know for sure
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"""if not "cert_user_name" in content: # New file, unknown user
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content["cert_auth_type"] = "unknown"
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content["cert_user_name"] = "unknown@unknown"
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"""
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user_urn = "%s/%s" % (content["cert_auth_type"], content["cert_user_id"]) # web/nofish@zeroid.bit
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rules = copy.copy(user_contents["permissions"].get(content["cert_user_id"], {})) # Default rules by username
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if rules is False:
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return False # User banned
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if "signers" in rules:
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rules["signers"] = rules["signers"][:] # Make copy of the signers
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for permission_pattern, permission_rules in user_contents["permission_rules"].items(): # Regexp rules
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if not re.match(permission_pattern, user_urn):
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continue # Rule is not valid for user
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# Update rules if its better than current recorded ones
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for key, val in permission_rules.iteritems():
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if key not in rules:
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if type(val) is list:
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rules[key] = val[:] # Make copy
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else:
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rules[key] = val
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elif type(val) is int: # Int, update if larger
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if val > rules[key]:
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rules[key] = val
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elif hasattr(val, "startswith"): # String, update if longer
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if len(val) > len(rules[key]):
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rules[key] = val
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elif type(val) is list: # List, append
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rules[key] += val
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rules["cert_signers"] = user_contents["cert_signers"] # Add valid cert signers
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if "signers" not in rules:
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rules["signers"] = []
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rules["signers"].append(user_address) # Add user as valid signer
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rules["user_address"] = user_address
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return rules
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# Create and sign a content.json
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# Return: The new content if filewrite = False
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def sign(self, inner_path="content.json", privatekey=None, filewrite=True, update_changed_files=False, extend=None):
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content = self.contents.get(inner_path)
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if not content: # Content not exist yet, load default one
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self.log.info("File %s not exist yet, loading default values..." % inner_path)
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content = {"files": {}, "signs": {}} # Default content.json
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if inner_path == "content.json": # It's the root content.json, add some more fields
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content["title"] = "%s - ZeroNet_" % self.site.address
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content["description"] = ""
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content["signs_required"] = 1
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content["ignore"] = ""
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if extend:
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content.update(extend) # Add custom fields
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directory = self.toDir(self.site.storage.getPath(inner_path))
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self.log.info("Opening site data directory: %s..." % directory)
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hashed_files = {}
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changed_files = [inner_path]
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for root, dirs, files in os.walk(directory):
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for file_name in files:
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file_path = self.site.storage.getPath("%s/%s" % (root.strip("/"), file_name))
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file_inner_path = re.sub(re.escape(directory), "", file_path)
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if file_name == "content.json":
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ignored = True
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elif content.get("ignore") and re.match(content["ignore"], file_inner_path):
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ignored = True
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elif file_name.startswith("."):
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ignored = True
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else:
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ignored = False
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if ignored: # Ignore content.json, definied regexp and files starting with .
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self.log.info("- [SKIPPED] %s" % file_inner_path)
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else:
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sha512sum = CryptHash.sha512sum(file_path) # Calculate sha512 sum of file
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self.log.info("- %s (SHA512: %s)" % (file_inner_path, sha512sum))
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hashed_files[file_inner_path] = {"sha512": sha512sum, "size": os.path.getsize(file_path)}
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if (
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file_inner_path in content["files"].keys()
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and hashed_files[file_inner_path]["sha512"] != content["files"][file_inner_path].get("sha512")
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):
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changed_files.append(file_path)
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self.log.debug("Changed files: %s" % changed_files)
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if update_changed_files:
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for file_path in changed_files:
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self.site.storage.onUpdated(file_path)
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# Generate new content.json
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self.log.info("Adding timestamp and sha512sums to new content.json...")
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new_content = content.copy() # Create a copy of current content.json
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new_content["files"] = hashed_files # Add files sha512 hash
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new_content["modified"] = time.time() # Add timestamp
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if inner_path == "content.json":
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new_content["address"] = self.site.address
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new_content["zeronet_version"] = config.version
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new_content["signs_required"] = content.get("signs_required", 1)
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from Crypt import CryptBitcoin
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self.log.info("Verifying private key...")
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privatekey_address = CryptBitcoin.privatekeyToAddress(privatekey)
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valid_signers = self.getValidSigners(inner_path, new_content)
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if privatekey_address not in valid_signers:
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return self.log.error(
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"Private key invalid! Valid signers: %s, Private key address: %s" %
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(valid_signers, privatekey_address)
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)
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self.log.info("Correct %s in valid signers: %s" % (privatekey_address, valid_signers))
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if inner_path == "content.json" and privatekey_address == self.site.address:
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# If signing using the root key, then sign the valid signers
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new_content["signers_sign"] = CryptBitcoin.sign(
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"%s:%s" % (new_content["signs_required"], ",".join(valid_signers)), privatekey
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)
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if not new_content["signers_sign"]:
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self.log.info("Old style address, signers_sign is none")
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self.log.info("Signing %s..." % inner_path)
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if "signs" in new_content:
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del(new_content["signs"]) # Delete old signs
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if "sign" in new_content:
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del(new_content["sign"]) # Delete old sign (backward compatibility)
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sign_content = json.dumps(new_content, sort_keys=True)
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sign = CryptBitcoin.sign(sign_content, privatekey)
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# new_content["signs"] = content.get("signs", {}) # TODO: Multisig
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if sign: # If signing is successful (not an old address)
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new_content["signs"] = {}
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new_content["signs"][privatekey_address] = sign
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if inner_path == "content.json": # To root content.json add old format sign for backward compatibility
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oldsign_content = json.dumps(new_content, sort_keys=True)
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new_content["sign"] = CryptBitcoin.signOld(oldsign_content, privatekey)
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if not self.validContent(inner_path, new_content):
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self.log.error("Sign failed: Invalid content")
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return False
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if filewrite:
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self.log.info("Saving to %s..." % inner_path)
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self.site.storage.writeJson(inner_path, new_content)
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self.log.info("File %s signed!" % inner_path)
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if filewrite: # Written to file
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return True
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else: # Return the new content
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return new_content
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# The valid signers of content.json file
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# Return: ["1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6", "13ReyhCsjhpuCVahn1DHdf6eMqqEVev162"]
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def getValidSigners(self, inner_path, content=None):
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valid_signers = []
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if inner_path == "content.json": # Root content.json
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if "content.json" in self.contents and "signers" in self.contents["content.json"]:
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valid_signers += self.contents["content.json"]["signers"].keys()
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else:
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rules = self.getRules(inner_path, content)
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if rules and "signers" in rules:
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valid_signers += rules["signers"]
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if self.site.address not in valid_signers:
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valid_signers.append(self.site.address) # Site address always valid
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return valid_signers
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# Return: The required number of valid signs for the content.json
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def getSignsRequired(self, inner_path, content=None):
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return 1 # Todo: Multisig
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def verifyCert(self, inner_path, content):
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from Crypt import CryptBitcoin
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rules = self.getRules(inner_path, content)
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if not rules.get("cert_signers"):
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return True # Does not need cert
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name, domain = content["cert_user_id"].split("@")
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cert_address = rules["cert_signers"].get(domain)
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if not cert_address: # Cert signer not allowed
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self.log.error("Invalid cert signer: %s" % domain)
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return False
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return CryptBitcoin.verify(
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"%s#%s/%s" % (rules["user_address"], content["cert_auth_type"], name), cert_address, content["cert_sign"]
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)
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# Checks if the content.json content is valid
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# Return: True or False
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def validContent(self, inner_path, content):
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content_size = len(json.dumps(content)) + sum([file["size"] for file in content["files"].values()]) # Size of new content
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site_size = self.getTotalSize(ignore=inner_path) + content_size # Site size without old content
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if site_size > self.site.settings.get("size", 0):
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self.site.settings["size"] = site_size # Save to settings if larger
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site_size_limit = self.site.getSizeLimit() * 1024 * 1024
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# Check total site size limit
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if site_size > site_size_limit:
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self.log.error("%s: Site too large %s > %s, aborting task..." % (inner_path, site_size, site_size_limit))
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task = self.site.worker_manager.findTask(inner_path)
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if task: # Dont try to download from other peers
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self.site.worker_manager.failTask(task)
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return False
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if inner_path == "content.json":
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return True # Root content.json is passed
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# Load include details
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rules = self.getRules(inner_path, content)
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if not rules:
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self.log.error("%s: No rules" % inner_path)
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return False
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# Check include size limit
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if rules.get("max_size"): # Include size limit
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if content_size > rules["max_size"]:
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self.log.error("%s: Include too large %s > %s" % (inner_path, content_size, rules["max_size"]))
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return False
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# Check if content includes allowed
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if rules.get("includes_allowed") is False and content.get("includes"):
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self.log.error("%s: Includes not allowed" % inner_path)
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return False # Includes not allowed
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# Filename limit
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if rules.get("files_allowed"):
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for file_inner_path in content["files"].keys():
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if not re.match("^%s$" % rules["files_allowed"], file_inner_path):
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self.log.error("%s: File not allowed" % file_inner_path)
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return False
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return True # All good
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# Verify file validity
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# Return: None = Same as before, False = Invalid, True = Valid
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def verifyFile(self, inner_path, file, ignore_same=True):
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if inner_path.endswith("content.json"): # content.json: Check using sign
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from Crypt import CryptBitcoin
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try:
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new_content = json.load(file)
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if inner_path in self.contents:
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old_content = self.contents.get(inner_path)
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# Checks if its newer the ours
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if old_content["modified"] == new_content["modified"] and ignore_same: # Ignore, have the same content.json
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return None
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elif old_content["modified"] > new_content["modified"]: # We have newer
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self.log.debug(
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"We have newer %s (Our: %s, Sent: %s)" %
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(inner_path, old_content["modified"], new_content["modified"])
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)
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gevent.spawn(self.site.publish, inner_path=inner_path) # Try to fix the broken peers
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return False
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if new_content["modified"] > time.time() + 60 * 60 * 24: # Content modified in the far future (allow 1 day+)
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self.log.error("%s modify is in the future!" % inner_path)
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return False
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# Check sign
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sign = new_content.get("sign")
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signs = new_content.get("signs", {})
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if "sign" in new_content:
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del(new_content["sign"]) # The file signed without the sign
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if "signs" in new_content:
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del(new_content["signs"]) # The file signed without the signs
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|
sign_content = json.dumps(new_content, sort_keys=True) # Dump the json to string to remove whitepsace
|
|
|
|
if not self.validContent(inner_path, new_content):
|
|
return False # Content not valid (files too large, invalid files)
|
|
|
|
if signs: # New style signing
|
|
valid_signers = self.getValidSigners(inner_path, new_content)
|
|
signs_required = self.getSignsRequired(inner_path, new_content)
|
|
|
|
if inner_path == "content.json" and len(valid_signers) > 1: # Check signers_sign on root content.json
|
|
if not CryptBitcoin.verify(
|
|
"%s:%s" % (signs_required, ",".join(valid_signers)), self.site.address, new_content["signers_sign"]
|
|
):
|
|
self.log.error("%s invalid signers_sign!" % inner_path)
|
|
return False
|
|
|
|
if inner_path != "content.json" and not self.verifyCert(inner_path, new_content): # Check if cert valid
|
|
self.log.error("%s invalid cert!" % inner_path)
|
|
return False
|
|
|
|
valid_signs = 0
|
|
for address in valid_signers:
|
|
if address in signs:
|
|
valid_signs += CryptBitcoin.verify(sign_content, address, signs[address])
|
|
if valid_signs >= signs_required:
|
|
break # Break if we has enough signs
|
|
|
|
return valid_signs >= signs_required
|
|
else: # Old style signing
|
|
return CryptBitcoin.verify(sign_content, self.site.address, sign)
|
|
|
|
except Exception, err:
|
|
self.log.error("Verify sign error: %s" % Debug.formatException(err))
|
|
return False
|
|
|
|
else: # Check using sha512 hash
|
|
file_info = self.getFileInfo(inner_path)
|
|
if file_info:
|
|
if "sha512" in file_info:
|
|
hash_valid = CryptHash.sha512sum(file) == file_info["sha512"]
|
|
elif "sha1" in file_info: # Backward compatibility
|
|
hash_valid = CryptHash.sha1sum(file) == file_info["sha1"]
|
|
else:
|
|
hash_valid = False
|
|
if file_info["size"] != file.tell():
|
|
self.log.error(
|
|
"%s file size does not match %s <> %s, Hash: %s" %
|
|
(inner_path, file.tell(), file_info["size"], hash_valid)
|
|
)
|
|
return False
|
|
return hash_valid
|
|
|
|
else: # File not in content.json
|
|
self.log.error("File not in content.json: %s" % inner_path)
|
|
return False
|
|
|
|
# Get dir from file
|
|
# Return: data/site/content.json -> data/site
|
|
def toDir(self, inner_path):
|
|
file_dir = re.sub("[^/]*?$", "", inner_path).strip("/")
|
|
if file_dir:
|
|
file_dir += "/" # Add / at end if its not the root
|
|
return file_dir
|
|
|
|
|
|
def testSign():
|
|
global config
|
|
from Site import Site
|
|
site = Site("12Hw8rTgzrNo4DSh2AkqwPRqDyTticwJyH")
|
|
content_manager = ContentManager(site)
|
|
content_manager.sign(
|
|
"data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/content.json", "5JCGE6UUruhfmAfcZ2GYjvrswkaiq7uLo6Gmtf2ep2Jh2jtNzWR"
|
|
)
|
|
|
|
|
|
def testVerify():
|
|
from Site import Site
|
|
site = Site("12Hw8rTgzrNo4DSh2AkqwPRqDyTticwJyH")
|
|
|
|
content_manager = ContentManager(site)
|
|
print "Loaded contents:", content_manager.contents.keys()
|
|
|
|
file = open(site.storage.getPath("data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/content.json"))
|
|
print "content.json valid:", content_manager.verifyFile(
|
|
"data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/content.json", file, ignore_same=False
|
|
)
|
|
|
|
file = open(site.storage.getPath("data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/messages.json"))
|
|
print "messages.json valid:", content_manager.verifyFile(
|
|
"data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/messages.json", file, ignore_same=False
|
|
)
|
|
|
|
|
|
def testInfo():
|
|
from Site import Site
|
|
site = Site("12Hw8rTgzrNo4DSh2AkqwPRqDyTticwJyH")
|
|
|
|
content_manager = ContentManager(site)
|
|
print content_manager.contents.keys()
|
|
|
|
print content_manager.getFileInfo("index.html")
|
|
print content_manager.getIncludeInfo("data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/content.json")
|
|
print content_manager.getValidSigners("data/users/1KRxE1s3oDyNDawuYWpzbLUwNm8oDbeEp6/content.json")
|
|
print content_manager.getValidSigners("data/users/content.json")
|
|
print content_manager.getValidSigners("content.json")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import sys
|
|
import logging
|
|
os.chdir("../..")
|
|
sys.path.insert(0, os.path.abspath("."))
|
|
sys.path.insert(0, os.path.abspath("src"))
|
|
logging.basicConfig(level=logging.DEBUG)
|
|
|
|
# testSign()
|
|
testVerify()
|
|
# testInfo()
|