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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2010-10-19 21:31:55 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-11-26 20:53:59 +0800 |
| commit | 8ff590903d5fc7f5a0a988c38267a3d08e6393a2 (patch) | |
| tree | 2e73472f71848945136661c82f50176d6a3db388 /crypto/Kconfig | |
| parent | fe869cdb89c95d060c77eea20204d6c91f233b53 (diff) | |
| download | lwn-8ff590903d5fc7f5a0a988c38267a3d08e6393a2.tar.gz lwn-8ff590903d5fc7f5a0a988c38267a3d08e6393a2.zip | |
crypto: algif_skcipher - User-space interface for skcipher operations
This patch adds the af_alg plugin for symmetric key ciphers,
corresponding to the ablkcipher kernel operation type.
Keys can optionally be set through the setsockopt interface.
Once a sendmsg call occurs without MSG_MORE no further writes
may be made to the socket until all previous data has been read.
IVs and and whether encryption/decryption is performed can be
set through the setsockopt interface or as a control message
to sendmsg.
The interface is completely synchronous, all operations are
carried out in recvmsg(2) and will complete prior to the system
call returning.
The splice(2) interface support reading the user-space data directly
without copying (except that the Crypto API itself may copy the data
if alignment is off).
The recvmsg(2) interface supports directly writing to user-space
without additional copying, i.e., the kernel crypto interface will
receive the user-space address as its output SG list.
Thakns to Miloslav Trmac for reviewing this and contributing
fixes and improvements.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 6db27d7ff8b3..69437e21217f 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -852,6 +852,14 @@ config CRYPTO_USER_API_HASH This option enables the user-spaces interface for hash algorithms. +config CRYPTO_USER_API_SKCIPHER + tristate "User-space interface for symmetric key cipher algorithms" + select CRYPTO_BLKCIPHER + select CRYPTO_USER_API + help + This option enables the user-spaces interface for symmetric + key cipher algorithms. + source "drivers/crypto/Kconfig" endif # if CRYPTO |