Rewrites the get-tor code to always get the latest version of tor

We first get the version of tor browser and url for the platform
from downloads.json. Then we get the sha256sum from the checksums
provided by tor in their distribution release to compare with the file
downloaded.

desktop/scripts/get-tor.py

@@ -9,29 +9,10 @@ import subprocess
 import requests
 import click
 
-torbrowser_version = "12.0"
+torbrowser_version_url = (
-expected_win32_sha256 = (
+    "https://aus1.torproject.org/torbrowser/update_3/release/downloads.json"
-    "a9cc0f0af2ce8ca0d7a27d65c7efa37f6419cfc793fa80371e7db73d44b4cc02"
 )
-expected_win64_sha256 = (
+torbrowser_root_url = "https://dist.torproject.org/torbrowser"
-    "f496cc0219c8b73f1f100124d6514bad55f503ff76202747f23620a6677e83c2"
-)
-expected_macos_sha256 = (
-    "11c8360187356e6c0837612a320f1a117303fc449602c9fd73f4faf9f9bbcfc9"
-)
-expected_linux64_sha256 = (
-    "850ce601d815bac63e4f5937646d2b497173be28b27b30a7526ebb946a459874"
-)
-
-win32_filename = f"torbrowser-install-{torbrowser_version}_ALL.exe"
-win32_url = f"https://dist.torproject.org/torbrowser/{torbrowser_version}/{win32_filename}"
-win64_filename = f"torbrowser-install-win64-{torbrowser_version}_ALL.exe"
-win64_url = f"https://dist.torproject.org/torbrowser/{torbrowser_version}/{win64_filename}"
-macos_filename = f"TorBrowser-{torbrowser_version}-macos_ALL.dmg"
-macos_url = f"https://dist.torproject.org/torbrowser/{torbrowser_version}/{macos_filename}"
-linux64_filename = f"tor-browser-linux64-{torbrowser_version}_ALL.tar.xz"
-linux64_url = f"https://dist.torproject.org/torbrowser/{torbrowser_version}/{linux64_filename}"
-
 
 # Common paths
 root_path = os.path.dirname(
@@ -40,24 +21,40 @@ root_path = os.path.dirname(
 working_path = os.path.join(root_path, "build", "tor")
 
 
-def get_tor_windows(platform):
+def get_expected_platform_sha256(platform_filename, torbrowser_version):
-    if platform == "win32":
+    r = requests.get(
-        win_url = win32_url
+        f"{torbrowser_root_url}/{torbrowser_version}/sha256sums-signed-build.txt"
-        win_filename = win32_filename
+    )
-        expected_win_sha256 = expected_win32_sha256
+    for checksum_item in r.content.decode().split("\n"):
-        bin_filenames = [
+        [checksum, filename] = checksum_item.split()
-            "tor.exe"
+        if filename == platform_filename:
-        ]
+            return checksum
-    elif platform == "win64":
+
-        win_url = win64_url
+    return None
-        win_filename = win64_filename
+
-        expected_win_sha256 = expected_win64_sha256
+
-        bin_filenames = [
+def get_latest_tor_version_urls(platform):
-            "tor.exe"
+    r = requests.get(torbrowser_version_url)
-        ]
+    if r.status_code != 200 or platform not in r.json()["downloads"]:
-    else:
+        print("Tor browser version url not working")
-        click.echo("invalid platform")
+        sys.exit(-1)
-        return
+
+    torbrowser_version = r.json()["version"]
+    platform_url = r.json()["downloads"][platform]["ALL"]["binary"]
+    platform_filename = platform_url.split("/")[-1]
+    expected_platform_sha256 = get_expected_platform_sha256(
+        platform_filename, torbrowser_version
+    )
+
+    if not expected_platform_sha256:
+        print(f"Expected sha256sum for {platform} not found")
+        sys.exit(-1)
+
+    return platform_url, platform_filename, expected_platform_sha256
+
+
+def get_tor_windows(win_url, win_filename, expected_win_sha256):
+    bin_filenames = ["tor.exe"]
 
     # Build paths
     win_path = os.path.join(working_path, win_filename)
@@ -81,7 +78,7 @@ def get_tor_windows(platform):
     # Compare the hash
     if win_sha256 != expected_win_sha256:
         print("ERROR! The sha256 doesn't match:")
-        print("expected: {}".format(expected_win32_sha256))
+        print("expected: {}".format(expected_win_sha256))
         print("  actual: {}".format(win_sha256))
         sys.exit(-1)
 
@@ -126,7 +123,7 @@ def get_tor_windows(platform):
     update_tor_bridges()
 
 
-def get_tor_macos():
+def get_tor_macos(macos_url, macos_filename, expected_macos_sha256):
     # Build paths
     dmg_tor_path = os.path.join(
         "/Volumes", "Tor Browser", "Tor Browser.app", "Contents"
@@ -186,7 +183,7 @@ def get_tor_macos():
     update_tor_bridges()
 
 
-def get_tor_linux64():
+def get_tor_linux64(linux64_url, linux64_filename, expected_linux64_sha256):
     # Build paths
     tarball_path = os.path.join(working_path, linux64_filename)
     dist_path = os.path.join(root_path, "onionshare", "resources", "tor")
@@ -321,14 +318,21 @@ def main(platform):
         click.echo(f"platform must be one of: {valid_platforms}")
         return
 
+    global platform_url, platform_filename, expected_platform_sha256
+    (
+        platform_url,
+        platform_filename,
+        expected_platform_sha256,
+    ) = get_latest_tor_version_urls(platform)
+
     if platform == "win32":
-        get_tor_windows(platform)
+        get_tor_windows(platform_url, platform_filename, expected_platform_sha256)
     elif platform == "win64":
-        get_tor_windows(platform)
+        get_tor_windows(platform_url, platform_filename, expected_platform_sha256)
     elif platform == "macos":
-        get_tor_macos()
+        get_tor_macos(platform_url, platform_filename, expected_platform_sha256)
     elif platform == "linux64":
-        get_tor_linux64()
+        get_tor_linux64(platform_url, platform_filename, expected_platform_sha256)
     else:
         click.echo("invalid platform")