import pytest
import sys
+import struct
import u_boot_utils as util
@pytest.mark.boardspec('sandbox')
util.run_and_log(cons, [mkimage, '-F', '-k', tmpdir, '-K', dtb,
'-r', fit])
+ def replace_fit_totalsize(size):
+ """Replace FIT header's totalsize with something greater.
+
+ The totalsize must be less than or equal to FIT_SIGNATURE_MAX_SIZE.
+ If the size is greater, the signature verification should return false.
+
+ Args:
+ size: The new totalsize of the header
+
+ Returns:
+ prev_size: The previous totalsize read from the header
+ """
+ total_size = 0
+ with open(fit, 'r+b') as handle:
+ handle.seek(4)
+ total_size = handle.read(4)
+ handle.seek(4)
+ handle.write(struct.pack(">I", size))
+ return struct.unpack(">I", total_size)[0]
+
def test_with_algo(sha_algo):
"""Test verified boot with the given hash algorithm.
util.run_and_log(cons, [fit_check_sign, '-f', fit, '-k', tmpdir,
'-k', dtb])
+ # Replace header bytes
+ bcfg = u_boot_console.config.buildconfig
+ max_size = int(bcfg.get('config_fit_signature_max_size', 0x10000000), 0)
+ existing_size = replace_fit_totalsize(max_size + 1)
+ run_bootm(sha_algo, 'Signed config with bad hash', 'Bad Data Hash', False)
+ cons.log.action('%s: Check overflowed FIT header totalsize' % sha_algo)
+
+ # Replace with existing header bytes
+ replace_fit_totalsize(existing_size)
+ run_bootm(sha_algo, 'signed config', 'dev+', True)
+ cons.log.action('%s: Check default FIT header totalsize' % sha_algo)
+
# Increment the first byte of the signature, which should cause failure
sig = util.run_and_log(cons, 'fdtget -t bx %s %s value' %
(fit, sig_node))
public_exponent = 65537
util.run_and_log(cons, 'openssl genpkey -algorithm RSA -out %sdev.key '
'-pkeyopt rsa_keygen_bits:2048 '
- '-pkeyopt rsa_keygen_pubexp:%d '
- '2>/dev/null' % (tmpdir, public_exponent))
+ '-pkeyopt rsa_keygen_pubexp:%d' %
+ (tmpdir, public_exponent))
# Create a certificate containing the public key
util.run_and_log(cons, 'openssl req -batch -new -x509 -key %sdev.key -out '