def secretbox_xsalsa20poly1305_open(c, n, k):
if len(c) < 16: raise ValueError('Too short for XSalsa20Poly1305 box')
s = stream_xsalsa20(32, n, k)
if not onetimeauth_poly1305_verify(c[:16], c[16:], s):
raise ValueError('Bad authenticator for XSalsa20Poly1305 box')
s = stream_xsalsa20(16 + len(c), n, k)
return xor(c[16:], s[32:])
def secretbox_xsalsa20poly1305_open(c, n, k):
if len(c) < 16: raise ValueError('Too short for XSalsa20Poly1305 box')
s = stream_xsalsa20(32, n, k)
if not onetimeauth_poly1305_verify(c[:16], c[16:], s):
raise ValueError('Bad authenticator for XSalsa20Poly1305 box')
s = stream_xsalsa20(16 + len(c), n, k)
return xor(c[16:], s[32:])
def secretbox_xsalsa20poly1305(m, n, k):
s = stream_xsalsa20(32 + len(m), n, k)
c = xor(m, s[32:])
a = onetimeauth_poly1305(c, s[:32])
return a + c
def secretbox_xsalsa20poly1305(m, n, k): s = stream_xsalsa20(32 + len(m), n, k) c = xor(m, s[32:]) a = onetimeauth_poly1305(c, s[:32]) return a + c
