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crypto: vmac - Make VMAC work when blocks aren't aligned

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VMAC implementation, as it is, does not work with blocks that
are not multiples of 128-bytes.  Furthermore, this is a problem
when using the implementation on scatterlists, even
when the complete plain text is 128-byte multiple, as the pieces
that get passed to vmac_update can be pretty much any size.

I also added test cases for unaligned blocks.

Signed-off-by: Salman Qazi <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Salman Qazi 2012-10-05 14:24:14 -07:00 • committed by Herbert Xu
commit ba1ee07090
3 changed files with 77 additions and 5 deletions
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33
crypto/testmgr.h
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@ -1707,7 +1707,7 @@ static struct hash_testvec aes_xcbc128_tv_template[] = {
}
};
#define VMAC_AES_TEST_VECTORS 8
#define VMAC_AES_TEST_VECTORS 11
static char vmac_string1[128] = {'\x01', '\x01', '\x01', '\x01',
'\x02', '\x03', '\x02', '\x02',
'\x02', '\x04', '\x01', '\x07',
@ -1723,6 +1723,19 @@ static char vmac_string3[128] = {'a', 'b', 'c', 'a', 'b', 'c',
'a', 'b', 'c', 'a', 'b', 'c',
};
static char vmac_string4[17] = {'b', 'c', 'e', 'f',
'i', 'j', 'l', 'm',
'o', 'p', 'r', 's',
't', 'u', 'w', 'x', 'z'};
static char vmac_string5[127] = {'r', 'm', 'b', 't', 'c',
'o', 'l', 'k', ']', '%',
'9', '2', '7', '!', 'A'};
static char vmac_string6[129] = {'p', 't', '*', '7', 'l',
'i', '!', '#', 'w', '0',
'z', '/', '4', 'A', 'n'};
static struct hash_testvec aes_vmac128_tv_template[] = {
{
.key = "\x00\x01\x02\x03\x04\x05\x06\x07"
@ -1776,6 +1789,24 @@ static struct hash_testvec aes_vmac128_tv_template[] = {
.digest = "\x8b\x32\x8f\xe1\xed\x8f\xfa\xd4",
.psize = 128,
.ksize = 16,
}, {
.key = "a09b5cd!f#07K\x00\x00\x00",
.plaintext = vmac_string4,
.digest = "\xab\xa5\x0f\xea\x42\x4e\xa1\x5f",
.psize = sizeof(vmac_string4),
.ksize = 16,
}, {
.key = "a09b5cd!f#07K\x00\x00\x00",
.plaintext = vmac_string5,
.digest = "\x25\x31\x98\xbc\x1d\xe8\x67\x60",
.psize = sizeof(vmac_string5),
.ksize = 16,
}, {
.key = "a09b5cd!f#07K\x00\x00\x00",
.plaintext = vmac_string6,
.digest = "\xc4\xae\x9b\x47\x95\x65\xeb\x41",
.psize = sizeof(vmac_string6),
.ksize = 16,
},
};