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< h1 id = "shared-secret-registration" > < a class = "header" href = "#shared-secret-registration" > Shared-Secret Registration< / a > < / h1 >
< p > This API allows for the creation of users in an administrative and
non-interactive way. This is generally used for bootstrapping a Synapse
instance with administrator accounts.< / p >
< p > To authenticate yourself to the server, you will need both the shared secret
(< code > registration_shared_secret< / code > in the homeserver configuration), and a
one-time nonce. If the registration shared secret is not configured, this API
is not enabled.< / p >
< p > To fetch the nonce, you need to request one from the API:< / p >
< pre > < code > > GET /_synapse/admin/v1/register
< {" nonce" : " thisisanonce" }
< / code > < / pre >
< p > Once you have the nonce, you can make a < code > POST< / code > to the same URL with a JSON
body containing the nonce, username, password, whether they are an admin
(optional, False by default), and a HMAC digest of the content. Also you can
set the displayname (optional, < code > username< / code > by default).< / p >
< p > As an example:< / p >
< pre > < code > > POST /_synapse/admin/v1/register
> {
" nonce" : " thisisanonce" ,
" username" : " pepper_roni" ,
" displayname" : " Pepper Roni" ,
" password" : " pizza" ,
" admin" : true,
" mac" : " mac_digest_here"
}
< {
" access_token" : " token_here" ,
" user_id" : " @pepper_roni:localhost" ,
" home_server" : " test" ,
" device_id" : " device_id_here"
}
< / code > < / pre >
< p > The MAC is the hex digest output of the HMAC-SHA1 algorithm, with the key being
the shared secret and the content being the nonce, user, password, either the
string " admin" or " notadmin" , and optionally the user_type
each separated by NULs. For an example of generation in Python:< / p >
< pre > < code class = "language-python" > import hmac, hashlib
def generate_mac(nonce, user, password, admin=False, user_type=None):
mac = hmac.new(
key=shared_secret,
digestmod=hashlib.sha1,
)
mac.update(nonce.encode('utf8'))
mac.update(b" \x00" )
mac.update(user.encode('utf8'))
mac.update(b" \x00" )
mac.update(password.encode('utf8'))
mac.update(b" \x00" )
mac.update(b" admin" if admin else b" notadmin" )
if user_type:
mac.update(b" \x00" )
mac.update(user_type.encode('utf8'))
return mac.hexdigest()
< / code > < / pre >
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