crypto: vmac - add nonced version with big endian digest

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Currently the VMAC template uses a "nonce" hardcoded to 0, which makes
it insecure unless a unique key is set for every message.  Also, the
endianness of the final digest is wrong: the implementation uses little
endian, but the VMAC specification has it as big endian, as do other
VMAC implementations such as the one in Crypto++.

Add a new VMAC template where the nonce is passed as the first 16 bytes
of data (similar to what is done for Poly1305's nonce), and the digest
is big endian.  Call it "vmac64", since the old name of simply "vmac"
didn't clarify whether the implementation is of VMAC-64 or of VMAC-128
(which produce 64-bit and 128-bit digests respectively); so we fix the
naming ambiguity too.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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This commit is contained in:

Eric Biggers 2018-06-18 10:22:39 -07:00 • committed by Herbert Xu

parent bb29648102

commit ed331adab3

3 changed files with 273 additions and 18 deletions

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6

crypto/testmgr.c

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155

crypto/testmgr.h

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130

crypto/vmac.c

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