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authorHerbert Xu <herbert@gondor.apana.org.au>2005-11-05 00:58:14 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-09 17:15:37 -0500
commit5cb1454b862ab3040b78364d58330262fea1ddba (patch)
tree7e62126fa1f1398bb6a6b7f9e136aece32b0e112 /include/linux/crypto.h
parent06ace7a9bafeb9047352707eb79e8eaa0dfdf5f2 (diff)
[CRYPTO] Allow multiple implementations of the same algorithm
This is the first step on the road towards asynchronous support in the Crypto API. It adds support for having multiple crypto_alg objects for the same algorithm registered in the system. For example, each device driver would register a crypto_alg object for each algorithm that it supports. While at the same time the user may load software implementations of those same algorithms. Users of the Crypto API may then select a specific implementation by name, or choose any implementation for a given algorithm with the highest priority. The priority field is a 32-bit signed integer. In future it will be possible to modify it from user-space. This also provides a solution to the problem of selecting amongst various AES implementations, that is, aes vs. aes-i586 vs. aes-padlock. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux/crypto.h')
-rw-r--r--include/linux/crypto.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 3c89df6e7768..d88bf8aa8b47 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -3,6 +3,7 @@
3 * 3 *
4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5 * Copyright (c) 2002 David S. Miller (davem@redhat.com) 5 * Copyright (c) 2002 David S. Miller (davem@redhat.com)
6 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
6 * 7 *
7 * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no> 8 * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
8 * and Nettle, by Niels Möller. 9 * and Nettle, by Niels Möller.
@@ -126,7 +127,11 @@ struct crypto_alg {
126 unsigned int cra_blocksize; 127 unsigned int cra_blocksize;
127 unsigned int cra_ctxsize; 128 unsigned int cra_ctxsize;
128 unsigned int cra_alignmask; 129 unsigned int cra_alignmask;
130
131 int cra_priority;
132
129 const char cra_name[CRYPTO_MAX_ALG_NAME]; 133 const char cra_name[CRYPTO_MAX_ALG_NAME];
134 const char cra_driver_name[CRYPTO_MAX_ALG_NAME];
130 135
131 union { 136 union {
132 struct cipher_alg cipher; 137 struct cipher_alg cipher;