def extract_cert_chain(cls, header, data):
offset = header.code_size + header.sig_size
size = header.cert_chain_size
if header.supports_qti_signing():
offset += header.sig_size_qti + header.cert_chain_size_qti
data, seg = extract_segment(data, offset, size)
return data, seg
def extract_encryption_params(cls, data):
for magic in [
EncryptionParamsInfoHdr_1_0.byte_sequence(),
EncryptionParamsInfoHdr_2_0.byte_sequence(), SSD_MAGIC
]:
magic_index = data.find(magic)
if magic_index != -1:
offset = magic_index
size = len(data) - offset
return extract_segment(data, offset, size)
return data, ""
def extract_cert_chain(cls, header, data):
offset = header.code_size + header.sig_size
size = header.cert_chain_size
data, seg = extract_segment(data, offset, size)
return data, seg
def extract_cert_chain_qti(cls, header, data):
offset = header.code_size + header.sig_size_qti
size = header.cert_chain_size_qti
return extract_segment(data, offset, size)
def extract_sign_qti(cls, header, data):
offset = header.code_size
size = header.sig_size_qti
return extract_segment(data, offset, size)