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Nettle
nettle
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23b1c8b4
Commit
23b1c8b4
authored
Apr 26, 2014
by
Niels Möller
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Document additional GCM and UMAC constants.
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03e73ee7
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ChangeLog
View file @
23b1c8b4
2014-04-26 Niels Möller <nisse@lysator.liu.se>
* nettle.texinfo (GCM): Document GCM_DIGEST_SIZE.
(UMAC): Document new UMAC constants.
* umac.h (UMAC_MIN_NONCE_SIZE, UMAC_MAX_NONCE_SIZE): New
constants.
...
...
nettle.texinfo
View file @
23b1c8b4
...
...
@@ -2044,6 +2044,10 @@ Holds state corresponding to a particular message.
@acronym
{
GCM
}
's block size, 16.
@end defvr
@defvr Constant GCM
_
DIGEST
_
SIZE
Size of the @acronym
{
GCM
}
digest, also 16.
@end defvr
@defvr Constant GCM
_
IV
_
SIZE
Recommended size of the @acronym
{
IV
}
, 12. Other sizes are allowed.
@end defvr
...
...
@@ -2078,7 +2082,7 @@ a multiple of the block size.
@deftypefun void gcm
_
digest (struct gcm
_
ctx *@var
{
ctx
}
, const struct gcm
_
key *@var
{
key
}
, void *@var
{
cipher
}
, nettle
_
crypt
_
func *@var
{
f
}
, size
_
t @var
{
length
}
, uint8
_
t *@var
{
digest
}
)
Extracts the message digest (also known ``authentication tag''). This is
the final operation when processing a message. @var
{
length
}
is usually
equal to @code
{
GCM
_
BLOCK
_
SIZE
}
, but if you provide a smaller value,
equal to @code
{
GCM
_
DIGEST
_
SIZE
}
, but if you provide a smaller value,
only the first @var
{
length
}
octets of the digest are written.
@end deftypefun
...
...
@@ -2731,6 +2735,11 @@ Each @acronym{UMAC} variant uses its own context struct.
@defvr Constant UMAC
_
KEY
_
SIZE
The UMAC key size, 16.
@end defvr
@defvr Constant UMAC
_
MIN
_
NONCE
_
SIZE
@defvrx Constant UMAC
_
MAX
_
NONCE
_
SIZE
The the minimum and maximum sizes for an UMAC nonce, 1 and 16,
respectively.
@end defvr
@defvr Constant UMAC32
_
DIGEST
_
SIZE
The size of an UMAC32 digest, 4.
@end defvr
...
...
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