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import os
import re
import util
import colors
import time
import requests
import hashlib
def get_best_source(exclude=[], sources_list="/var/lib/xipkg/sources"):
# TODO implement exclude
source_speeds = {}
with open(sources_list, "r") as file:
for line in file.readlines():
split = line.split(" ")
if len(split) > 0:
try:
source_speeds[split[0]] = float(split[1])
except:
pass
return sorted(source_speeds.keys(), key=lambda k: source_speeds[k])
def find_package(query, repos, packages_dir, sources):
for repo in repos:
repo_dir = os.path.join(packages_dir, repo)
files = os.listdir(repo_dir)
if query in files:
requested_repo = repo
with open(os.path.join(repo_dir, query)) as file:
checksum = file.readline().strip().split("=")[-1]
listed_sources = file.readline().strip().split("=")[-1].split()
found_sources = {
source: util.add_path(url, repo)
for source, url in sources.items()
if source in listed_sources
}
return checksum, found_sources, requested_repo
return None, [], None
def verify_signature(package_file, package_info,
cache_dir="/var/cache/xipkg", keychain_dir="/var/lib/xipkg/keychain",
verbose=False):
checksum = package_info["CHECKSUM"]
sig_cached_path = util.add_path(cache_dir, checksum + ".sig")
with open(sig_cached_path, "wb") as file:
file.write(package_info["SIGNATURE"])
keys = os.listdir(keychain_dir)
for key in keys:
key_path = util.add_path(keychain_dir, key)
command = f"openssl dgst -verify {key_path} -signature {sig_cached_path} {package_file}"
if "OK" in os.popen(command).read():
return True
elif verbose:
print(colors.RED
+ f"Failed to verify signature against {key}"
+ colors.RESET)
return False
def retrieve_package_info(sources, checksum, package_name, config,
verbose=False, skip_verification=False):
sources_list=config["dir"]["sources"]
cache_dir=config["dir"]["cache"]
# TODO we may potentially do this a few times while resolving deps, might want to cache things here
for source in get_best_source(sources_list=sources_list):
url = sources[source]
package_info_url = util.add_path(url, package_name + ".xipkg.info")
status, response = util.curl(package_info_url, raw=True)
if status == 200:
info = parse_package_info(response)
if info["CHECKSUM"] == checksum or skip_verification:
return info
else:
if verbose:
print(colors.RED
+ f"Checksum verification failed for {package_name} in {source}"
+ colors.RESET)
if verbose:
print(colors.RED + f"No matching hashes found" + colors.RESET)
return {}
def retrieve_package(sources, package_info, package_name, config,
verbose=False, skip_verification=False):
sources_list=config["dir"]["sources"]
cache_dir=config["dir"]["cache"]
keychain_dir=config["dir"]["keychain"]
checksum = package_info["CHECKSUM"]
for source in get_best_source(sources_list=sources_list):
url = sources[source]
if verbose:
print(colors.LIGHT_BLACK + f"using source {source} at {url}")
package_url = util.add_path(url, package_name + ".xipkg")
package_dir = util.add_path(cache_dir, source)
util.mkdir(package_dir)
status, package_path = util.curl_to_file(package_url, util.add_path(package_dir, package_name + ".xipkg"), text=package_name + ".xipkg")
if status == 200:
downloaded_checksum = util.md5sum(package_path)
if not skip_verification:
if downloaded_checksum == checksum:
if verify_signature(package_path, package_info,
cache_dir=cache_dir, keychain_dir=keychain_dir, verbose=verbose):
print(colors.RESET)
return package_path
elif verbose:
print(colors.RED
+ f"Failed to verify signature for {package_name} in {source}"
+ colors.RESET)
elif verbose:
print(colors.RED
+ f"Checksum verification failed for {package_name} in {source}"
+ colors.RESET)
else:
print(colors.RESET)
return package_path
print(colors.RESET + colors.RED + f"No valid packages found for {package_name}" + colors.RESET)
return ""
def parse_package_info(packageinfo):
info = {}
lines = packageinfo.split(b"\n")
index = 0
while index < len(lines):
line = lines[index]
split = line.split(b"=")
if len(split) > 1:
if split[0] == b"SIGNATURE":
index += 1
digest = b"\n".join(lines[index:])
info["SIGNATURE"] = digest
break;
else:
info[str(split[0], "utf-8")] = str(b"=".join(split[1:]), "utf-8")
index += 1
return info
def resolve_dependencies(package_info):
getpkgs = lambda deps: re.findall("\w*", deps)
deps = getpkgs(package_info["DEPS"])
deps = [
dep for dep in deps if len(dep) > 0
]
return deps
def find_all_dependencies(package_names, options, config):
# this is all assuming that the order of deps installed doesn't matter
to_check = [p for p in package_names]
all_deps = []
while len(to_check) > 0:
util.loading_bar(len(all_deps), len(all_deps) + len(to_check), "Resolving dependencies...")
dep = to_check.pop()
dep_checksum, dep_sources, dep_repo = find_package(dep, config["repos"], config["dir"]["packages"], config["sources"])
if dep_checksum is not None:
info = retrieve_package_info(
dep_sources, dep_checksum, dep, config,
verbose=options["v"], skip_verification=options["u"]
)
if len(info) > 0:
if not dep in all_deps:
all_deps.append(dep)
deps = resolve_dependencies(info)
for dep in deps:
if not dep in all_deps:
if is_installed(dep, config, options["r"]):
print(colors.YELLOW + f"Package {query} has already been installed")
else:
to_check.append(dep)
else:
if options["v"]:
util.print_reset(colors.CLEAR_LINE + colors.RED + f"Failed to retrieve info for {query}")
else:
util.print_reset(colors.CLEAR_LINE + colors.RED + f"Failed to find package {dep}")
if len(all_deps) > 0:
util.loading_bar(len(all_deps), len(all_deps) + len(to_check), "Resolved dependencies")
print(colors.RESET)
# assuming that the latter packages are core dependencies
# we can reverse the array to reflect the more important packages to install
all_deps.reverse()
return all_deps
def is_installed(package_name, config, root="/"):
installed_dir = util.add_path(root, config["dir"]["installed"])
if os.path.exists(installed_dir):
files = os.listdir(installed_dir)
return package_name in files
return False
def install_package(package_path, package_info, config, root="/"):
# untar and move into root
# then add entry in the config["dir"]["installed"]
pass
def install(args, options, config):
sources = config["sources"]
repos = config["repos"]
v = options["v"]
unsafe = options["u"]
packages_dir = config["dir"]["packages"]
to_install = args if options["n"] else find_all_dependencies(args, options, config)
if len(to_install) > 0:
print(colors.BLUE + "The following packages will be installed:")
print(end="\t")
for d in to_install:
print(colors.BLUE if d in args else colors.LIGHT_BLUE, d, end="")
print()
if util.ask_confirmation(colors.BLUE + "Continue?", no_confirm=options["y"]):
for package in to_install:
checksum, sources, repo = find_package(package, config["repos"],
config["dir"]["packages"], config["sources"])
info = retrieve_package_info(
sources, checksum, package, config,
verbose=v, skip_verification=unsafe
)
retrieve_package(sources, info, package, config,
verbose=v, skip_verification=unsafe)
else:
print(colors.RED + "Action cancelled by user")
else:
print(colors.LIGHT_RED + "Nothing to do")
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