android（高通865）给ota包签名

参考博客：

Android 生成自己的签名key（releasekey platform shared media networkstack verify等）_Deep Lee的专栏-CSDN博客

更改ota签名只需更改

./build/make/tools/releasetools/ota_from_target_files -p out/host/linux-x86 --block -x pagesize=4096 -v -k build/target/product/security/testkey out/dist/merged-qssi_kona-target_files.zip ota.zip

将build/target/product/security/testkey 更改为build/target/product/security/platform（或者自己的签名文件）

./build/make/tools/releasetools/ota_from_target_files -p out/host/linux-x86 --block -x pagesize=4096 -v -k build/target/product/security/platform out/dist/merged-qssi_kona-target_files.zip ota.zip

./build/make/tools/releasetools/ota_from_target_files -p out/host/linux-x86 --block -x pagesize=4096 -v -k build/target/product/security/testkey out/dist/merged-qssi_kona-target_files.zip ota.zip

生成ota_info.txt

python ota.py ota.zip > ota_info.txt

ota.py内容

import sys
import zipfile
def main():
    if len(sys.argv) != 2:
        sys.stderr.write('Use: %s <ota_file.zip>\n' % sys.argv[0])
        return 1
    otazip = zipfile.ZipFile(sys.argv[1], 'r')
    payload_info = otazip.getinfo('payload.bin')
    payload_offset = payload_info.header_offset + len(payload_info.FileHeader())
    payload_size = payload_info.file_size
    payload_location = '/sdcard/update.zip'
    headers = otazip.read('payload_properties.txt')
    print ((
            'update_engine_client --update --follow --payload=file://{payload_location}'
            ' --offset={payload_offset} --size={payload_size}'
            ' --headers="{headers}"').format(**locals()))
    return 0
if __name__ == '__main__':
    sys.exit(main())