def secretbox_salsa20hmacsha512_open(c, n, k):
if len(c) < 32: raise ValueError('Too short for Salsa20HMACSHA512 box')
s = stream_salsa20(32, n, k)
if not auth_hmacsha512_verify(c[:32], c[32:], s):
raise ValueError('Bad authenticator for Salsa20HMACSHA512 box')
s = stream_salsa20(len(c), n, k)
return xor(c[32:], s[32:])
def secretbox_salsa20hmacsha512_open(c, n, k):
if len(c) < 32: raise ValueError('Too short for Salsa20HMACSHA512 box')
s = stream_salsa20(32, n, k)
if not auth_hmacsha512_verify(c[:32], c[32:], s):
raise ValueError('Bad authenticator for Salsa20HMACSHA512 box')
s = stream_salsa20(len(c), n, k)
return xor(c[32:], s[32:])
def secretbox_salsa20hmacsha512(m, n, k):
s = stream_salsa20(len(m) + 32, n, k)
c = xor(m, s[32:])
a = auth_hmacsha512(c, s[:32])
return a + c
def secretbox_salsa20hmacsha512(m, n, k): s = stream_salsa20(len(m) + 32, n, k) c = xor(m, s[32:]) a = auth_hmacsha512(c, s[:32]) return a + c