tools: drop tpm_hash_gen.pystabilize-quickfix-15183.78.B-cr50_stabstabilize-15185.B-cr50_stabstabilize-15185.7.B-cr50_stabstabilize-15183.82.B-cr50_stabstabilize-15183.69.B-cr50_stabstabilize-15183.14.B-cr50_stabstabilize-15174.B-cr50_stabstabilize-15167.B-cr50_stabrelease-R108-15183.B-cr50_stabfirmware-corsola-15194.B-cr50_stab

The script has been reworked to support multiple versions of GSC and
has been moved into the Ti50 tree.

BUG=None
TEST=None

Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Change-Id: I4ff086b73796bad09a7b572aa68566470582c28b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3936350
Reviewed-by: Mary Ruthven <mruthven@chromium.org>

1 files changed, 0 insertions, 114 deletions

diff --git a/util/tpm_hash_gen.py b/util/tpm_hash_gen.py
deleted file mode 100755
index bf1c661cf2..0000000000
--- a/util/tpm_hash_gen.py
+++ /dev/null
@@ -1,114 +0,0 @@
-#!/usr/bin/python
-# Copyright 2020 The ChromiumOS Authors
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-"""A program for calculating Cr50 TPM image identifier used in UMA.
-
-The code of this program is a Python equivalent of the code of function
-GetFingerprint() defined in
-
-https://chromium.googlesource.com/chromiumos/platform2/+/16911186/cryptohome/tpm.cc#78
-
-"""
-
-import hashlib
-import re
-import sys
-
-class MyError(Exception):
-    """Local Exception wrapper."""
-    pass
-
-
-def get_git_versions(cr50_file):
-    """Find git versions in a Cr50 binary image.
-
-    The Cr50 version string is generated at build time by the
-    ./util/getversion.sh script. The version string is built based on the
-    following template:
-
-    cr50_v<vers>-<git sha> tpm2:<vers>-<git sha> ... <year>-<month>-<day>
-
-    Since the Cr50 image includes sections for RW_A and RW_B, the same version
-    string is supposed to be present in the image twice.
-
-    This function reads the passed in file name, looks for the version, makes
-    sure that the version is present twice and both instances are identical,
-    then extracts git hashes of the ec and tpm2 trees from the version string
-    and returns them as a list of two integers.
-
-    Args:
-       cr50_file: A string, name of the Cr50 image file.
-
-    Returns:
-      A list of two integers, hashes of ec and tpm2 trees at build time.
-
-    Raises:
-      MyError: if consistent version string was not found in the file.
-
-    """
-    git_vers_regexp = re.compile(b'cr50_v[1-4].* tpm2.* 20[12][0-9]')
-    text = open(cr50_file, 'rb').read()
-    strings = git_vers_regexp.findall(text)
-    hashes = []
-
-    if len(strings) != 2 or strings[0] != strings[1]:
-        raise MyError('Could not find git version string in %s' % cr50_file)
-
-    for piece in strings[0].decode().split():
-        if piece.startswith('cr50_') or piece.startswith('tpm2'):
-            hashes.append(piece.split('-')[1])
-
-    return [int(x, 16) for x in  hashes]
-
-
-def hash_cr50_file(cr50_file):
-    """Calculate UMA key of a Cr50 image.
-
-    Find out git hashes of the ec and tpm2 components of the passed in Cr50
-    image and then generate a file hash following the same pattern which is
-    used by
-    https://chromium.googlesource.com/chromiumos/platform2/+/16911186/cryptohome/tpm.cc#78
-
-    Args:
-       cr50_file: A string, name of the Cr50 image file.
-
-    Returns:
-       An int, cr50 image hash calculated following the fixed template.
-    """
-    git_versions = get_git_versions(cr50_file)
-    hash_const = '322e3000000000000000007443524f5300000001'
-    tpm_hash_template = '%s%8.8x%8.8x%16.16x%s'
-    vendor_specific = 'xCG fTPM'
-
-    hash_input = tpm_hash_template % (hash_const, git_versions[0],
-                                      git_versions[1], len(vendor_specific),
-                                      vendor_specific)
-
-    h = hashlib.sha256()
-    h.update(bytes(hash_input, 'ascii'))
-
-    hex_digest = h.hexdigest()
-    uma_digest_list = [hex_digest[2*x:2*x + 2] for x in range(4)]
-    hex_uma_key = ''.join(uma_digest_list[::-1])
-    uma_key = int(hex_uma_key, 16) & 0x7fffffff
-    return uma_key
-
-
-def main(cr50_files):
-    """Calculate and report UMA keys for passed in Cr50 images.
-
-    Args:
-      cr50_files: A list of strings, names of Cr50 files to hash.
-    """
-    for cr50_file in cr50_files:
-        key = hash_cr50_file(cr50_file)
-        print('%08x %-9d %s' % (key, key, cr50_file))
-
-if __name__ == '__main__':
-    try:
-        main(sys.argv[1:])
-    except MyError as e:
-        print('Error:', e)
-        sys.exit(1)
-    sys.exit(0)