python3.x - Flask、Django的 secret key 设置有什么用？

问题描述

问 题

我在flask、与Django的文档中都发现需要配置 secret_key。

1. 这种 secret_key 有什么用吗？

2. 如果暴露他会带啦哪些安全风险？

解决方案

用来做一些模块的hash

>grep -Inr SECRET_KEY *
conf/global_settings.py:255:SECRET_KEY = ''
conf/project_template/settings.py:61:SECRET_KEY = ''
contrib/auth/tokens.py:54:        hash = sha_constructor(settings.SECRET_KEY + unicode(user.id) +
contrib/comments/forms.py:86:        info = (content_type, object_pk, timestamp, settings.SECRET_KEY)
contrib/formtools/utils.py:15:    order, pickles the result with the SECRET_KEY setting, then takes an md5
contrib/formtools/utils.py:32:    data.append(settings.SECRET_KEY)
contrib/messages/storage/cookie.py:112:        SECRET_KEY, modified to make it unique for the present purpose.
contrib/messages/storage/cookie.py:114:        key = 'django.contrib.messages' + settings.SECRET_KEY
contrib/sessions/backends/base.py:89:        pickled_md5 = md5_constructor(pickled + settings.SECRET_KEY).hexdigest()
contrib/sessions/backends/base.py:95:        if md5_constructor(pickled + settings.SECRET_KEY).hexdigest() != tamper_check:
contrib/sessions/backends/base.py:134:        # Use settings.SECRET_KEY as added salt.
contrib/sessions/backends/base.py:143:                       settings.SECRET_KEY)).hexdigest()
contrib/sessions/models.py:16:        pickled_md5 = md5_constructor(pickled + settings.SECRET_KEY).hexdigest()
contrib/sessions/models.py:59:        if md5_constructor(pickled + settings.SECRET_KEY).hexdigest() != tamper_check:
core/management/commands/startproject.py:32:        # Create a random SECRET_KEY hash, and put it in the main settings.
core/management/commands/startproject.py:37:        settings_contents = re.sub(r"(?<=SECRET_KEY = ')'", secret_key + "'", settings_contents)
middleware/csrf.py:38:                % (randrange(0, _MAX_CSRF_KEY), settings.SECRET_KEY)).hexdigest()
middleware/csrf.py:41:    return md5_constructor(settings.SECRET_KEY + session_id).hexdigest()

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