diff options
| author | Stephan Mueller <smueller@chronox.de> | 2017-07-30 15:32:58 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-08-09 15:17:52 +0300 |
| commit | 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 (patch) | |
| tree | 630095bdb72ca2c0e616f7accea0f0d826d3f2c0 /crypto/Kconfig | |
| parent | 5703c826b758e0b33c998739af093879979315b8 (diff) | |
| download | linux-72548b093ee38a6d4f2a19e6ef1948ae05c181f7.tar.xz | |
crypto: algif_aead - copy AAD from src to dst
Use the NULL cipher to copy the AAD and PT/CT from the TX SGL
to the RX SGL. This allows an in-place crypto operation on the
RX SGL for encryption, because the TX data is always smaller or
equal to the RX data (the RX data will hold the tag).
For decryption, a per-request TX SGL is created which will only hold
the tag value. As the RX SGL will have no space for the tag value and
an in-place operation will not write the tag buffer, the TX SGL with the
tag value is chained to the RX SGL. This now allows an in-place
crypto operation.
For example:
* without the patch:
kcapi -x 2 -e -c "gcm(aes)" -p 89154d0d4129d322e4487bafaa4f6b46 -k c0ece3e63198af382b5603331cc23fa8 -i 7e489b83622e7228314d878d -a afcd7202d621e06ca53b70c2bdff7fb2 -l 16 -u -s
00000000000000000000000000000000f4a3eacfbdadd3b1a17117b1d67ffc1f1e21efbbc6d83724a8c296e3bb8cda0c
* with the patch:
kcapi -x 2 -e -c "gcm(aes)" -p 89154d0d4129d322e4487bafaa4f6b46 -k c0ece3e63198af382b5603331cc23fa8 -i 7e489b83622e7228314d878d -a afcd7202d621e06ca53b70c2bdff7fb2 -l 16 -u -s
afcd7202d621e06ca53b70c2bdff7fb2f4a3eacfbdadd3b1a17117b1d67ffc1f1e21efbbc6d83724a8c296e3bb8cda0c
Tests covering this functionality have been added to libkcapi.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index caa770e535a2..0a121f9ddf8e 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1753,6 +1753,8 @@ config CRYPTO_USER_API_AEAD tristate "User-space interface for AEAD cipher algorithms" depends on NET select CRYPTO_AEAD + select CRYPTO_BLKCIPHER + select CRYPTO_NULL select CRYPTO_USER_API help This option enables the user-spaces interface for AEAD |