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3 Commits (a064d397688930dcb341f62587db4e8e786777a0)

Author SHA1 Message Date
Michael Brown da81214cec [crypto] Add concept of authentication tag to cipher algorithms 
Some ciphers (such as GCM) support the concept of a tag that can be
used to authenticate the encrypted data.  Add a cipher method for
generating an authentication tag.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2022-10-25 13:21:30 +01:00
Michael Brown 0c383bf00a [crypto] Add concept of additional data to cipher algorithms 
Some ciphers (such as GCM) support the concept of additional
authenticated data, which does not appear in the ciphertext but may
affect the operation of the cipher.

Allow cipher_encrypt() and cipher_decrypt() to be called with a NULL
destination buffer in order to pass additional data.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2022-10-25 13:21:30 +01:00
Michael Brown c0be4c6861 [test] Generalise cipher tests and use okx() 
Generalise the existing support for performing CBC-mode block cipher
tests, and update the code to use okx() for neater reporting of test
results.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2015-07-27 16:04:38 +01:00