def generate_twofactor_code_for_time(shared_secret, timestamp):
"""Generate Steam 2FA code for timestamp
:param shared_secret: authenticator shared secret
:type shared_secret: bytes
:param timestamp: timestamp to use, if left out uses current time
:type timestamp: int
:return: steam two factor code
:rtype: str
"""
hmac = hmac_sha1(bytes(shared_secret),
struct.pack('>Q',
int(timestamp) //
30)) # this will NOT stop working in 2038
start = ord(hmac[19:20]) & 0xF
codeint = struct.unpack('>I', hmac[start:start + 4])[0] & 0x7fffffff
charset = '23456789BCDFGHJKMNPQRTVWXY'
code = ''
for _ in range(5):
codeint, i = divmod(codeint, len(charset))
code += charset[i]
return code
def generate_confirmation_key(identity_secret, tag, timestamp):
"""Generate confirmation key for trades. Can only be used once.
:param identity_secret: authenticator identity secret
:type identity_secret: bytes
:param tag: tag identifies what the request, see list below
:type tag: str
:param timestamp: timestamp to use for generating key
:type timestamp: int
:return: confirmation key
:rtype: bytes
Tag choices:
* ``conf`` to load the confirmations page
* ``details`` to load details about a trade
* ``allow`` to confirm a trade
* ``cancel`` to cancel a trade
"""
data = struct.pack('>Q', int(timestamp)) + tag.encode('ascii') # this will NOT stop working in 2038
return hmac_sha1(bytes(identity_secret), data)
def generate_confirmation_key(identity_secret, tag, timestamp):
"""Generate confirmation key for trades. Can only be used once.
:param identity_secret: authenticator identity secret
:type identity_secret: bytes
:param tag: tag identifies what the request, see list below
:type tag: str
:param timestamp: timestamp to use for generating key
:type timestamp: int
:return: confirmation key
:rtype: bytes
Tag choices:
* ``conf`` to load the confirmations page
* ``details`` to load details about a trade
* ``allow`` to confirm a trade
* ``cancel`` to cancel a trade
"""
data = struct.pack('>Q', int(timestamp)) + tag.encode('ascii') # this will NOT stop working in 2038
return hmac_sha1(bytes(identity_secret), data)
def generate_twofactor_code_for_time(shared_secret, timestamp):
"""Generate Steam 2FA code for timestamp
:param shared_secret: authenticator shared secret
:type shared_secret: bytes
:param timestamp: timestamp to use, if left out uses current time
:type timestamp: int
:return: steam two factor code
:rtype: str
"""
hmac = hmac_sha1(bytes(shared_secret),
struct.pack('>Q', int(timestamp)//30)) # this will NOT stop working in 2038
start = ord(hmac[19:20]) & 0xF
codeint = struct.unpack('>I', hmac[start:start+4])[0] & 0x7fffffff
charset = '23456789BCDFGHJKMNPQRTVWXY'
code = ''
for _ in range(5):
codeint, i = divmod(codeint, len(charset))
code += charset[i]
return code
