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     1.2 +++ b/os/security/crypto/weakcryptospi/test/tsymmetric/scripts/Rijndael test data/ecb_iv.readme	Fri Jun 15 03:10:57 2012 +0200
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     1.4 +Description of the Intermediate Value Known Answer Test
     1.5 +--------------------------------------------------------
     1.6 +
     1.7 +The test encrypts one plaintext with a variable number of rounds.
     1.8 +In ECB encryption mode, the output PTi is the output after the 
     1.9 +initial key addition and i rounds (a round ends with a key
    1.10 +addition). 
    1.11 +
    1.12 +As explained in the documentation, in ECB decryption mode 
    1.13 +there are several definitions of a `round' possible. In order
    1.14 +to make visual inspection more intuitive, we output the
    1.15 +intermediate values that correspond with the output of the
    1.16 +encryption mode. 
    1.17 +These values might actually not occur in a practical decryption,
    1.18 +especially in an optimised implementation, where various operations
    1.19 +of different rounds are interchanged.
    1.20 +
    1.21 +This explains also why the Java and the C code output different
    1.22 +files for this test.