def post_share():
import random, string
from config import domain_name, sy_public_key
user = current_user
fid = request.form['fid']
choice = request.form['choice']
nonce = ''.join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(8))
ShareKey = secret.new_symmetric_key()
sym_key = secret.new_symmetric_key()
# 先对称解密再用新的分享密钥对称加密
Share.decrypt_and_encrypt(fid, user, sym_key)
# 分享码对对称密钥加密
enc_key = secret.symmetric_encrypt(ShareKey, sym_key)
# 慢速哈希分享码
hashShareKey = argon2.using(rounds=256, memory_cost=1024).hash(ShareKey)
# 使用服务器公钥加密分享码
enc_ShareKey = secret.encrypt(bytes.fromhex(sy_public_key), ShareKey)
sid = Share.add_share(fid, hashShareKey, enc_ShareKey, nonce, enc_key)
# 向指定用户发送分享消息
choice = choice.split(',')
for u in choice:
Message.create_msg(User.get_by(mail=u).usrid, user.usrname, sid, File.get_by(fileid=fid).filename)
return '分享成功！'
