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| author | Horia Geantă <horia.geanta@nxp.com> | 2018-03-20 10:56:12 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-03-30 20:33:02 +0300 |
| commit | 0550f5a5f0c5bac10e982c1e968db9f3f297dda3 (patch) | |
| tree | 20acb9b0e96728b7c717049f543638e7b8bbaeb3 /Documentation/crypto/devel-algos.rst | |
| parent | eb02c38f019726ede53eb31c3c604fd77cfedc2e (diff) | |
| download | linux-0550f5a5f0c5bac10e982c1e968db9f3f297dda3.tar.xz | |
crypto: doc - clarify hash callbacks state machine
Add a note that it is perfectly legal to "abandon" a request object:
- call .init() and then (as many times) .update()
- _not_ call any of .final(), .finup() or .export() at any point in
future
Link: https://lkml.kernel.org/r/20180222114741.GA27631@gondor.apana.org.au
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/crypto/devel-algos.rst')
| -rw-r--r-- | Documentation/crypto/devel-algos.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/crypto/devel-algos.rst b/Documentation/crypto/devel-algos.rst index 66f50d32dcec..c45c6f400dbd 100644 --- a/Documentation/crypto/devel-algos.rst +++ b/Documentation/crypto/devel-algos.rst @@ -236,6 +236,14 @@ when used from another part of the kernel. | '---------------> HASH2 +Note that it is perfectly legal to "abandon" a request object: +- call .init() and then (as many times) .update() +- _not_ call any of .final(), .finup() or .export() at any point in future + +In other words implementations should mind the resource allocation and clean-up. +No resources related to request objects should remain allocated after a call +to .init() or .update(), since there might be no chance to free them. + Specifics Of Asynchronous HASH Transformation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |