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authorHerbert Xu <herbert@gondor.apana.org.au>2006-08-20 15:17:04 +1000
committerHerbert Xu <herbert@gondor.apana.org.au>2006-09-21 11:46:20 +1000
commit878b9014666217555d16073764f30e825cf18d2f (patch)
treecd7ab9f6f49dc0eb3cbfacd0abfc1a1daa243aaf /Documentation/crypto
parent1b489e11d4df82514792f9f981f31976f8a94ddf (diff)
downloadlinux-878b9014666217555d16073764f30e825cf18d2f.tar.gz
[CRYPTO] doc: Update documentation for hash and me
This patch updates the documentation to reflect the switch from digest to hash. It also replaces notes about emailing James Morris to refer to me instead. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/crypto')
-rw-r--r--Documentation/crypto/api-intro.txt36
1 files changed, 22 insertions, 14 deletions
diff --git a/Documentation/crypto/api-intro.txt b/Documentation/crypto/api-intro.txt
index 74dffc68ff9..5a03a2801d6 100644
--- a/Documentation/crypto/api-intro.txt
+++ b/Documentation/crypto/api-intro.txt
@@ -19,15 +19,14 @@ At the lowest level are algorithms, which register dynamically with the
API.
'Transforms' are user-instantiated objects, which maintain state, handle all
-of the implementation logic (e.g. manipulating page vectors), provide an
-abstraction to the underlying algorithms, and handle common logical
-operations (e.g. cipher modes, HMAC for digests). However, at the user
+of the implementation logic (e.g. manipulating page vectors) and provide an
+abstraction to the underlying algorithms. However, at the user
level they are very simple.
Conceptually, the API layering looks like this:
[transform api] (user interface)
- [transform ops] (per-type logic glue e.g. cipher.c, digest.c)
+ [transform ops] (per-type logic glue e.g. cipher.c, compress.c)
[algorithm api] (for registering algorithms)
The idea is to make the user interface and algorithm registration API
@@ -44,22 +43,27 @@ under development.
Here's an example of how to use the API:
#include <linux/crypto.h>
+ #include <linux/err.h>
+ #include <linux/scatterlist.h>
struct scatterlist sg[2];
char result[128];
- struct crypto_tfm *tfm;
+ struct crypto_hash *tfm;
+ struct hash_desc desc;
- tfm = crypto_alloc_tfm("md5", 0);
- if (tfm == NULL)
+ tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm))
fail();
/* ... set up the scatterlists ... */
+
+ desc.tfm = tfm;
+ desc.flags = 0;
- crypto_digest_init(tfm);
- crypto_digest_update(tfm, &sg, 2);
- crypto_digest_final(tfm, result);
+ if (crypto_hash_digest(&desc, &sg, 2, result))
+ fail();
- crypto_free_tfm(tfm);
+ crypto_free_hash(tfm);
Many real examples are available in the regression test module (tcrypt.c).
@@ -126,7 +130,7 @@ might already be working on.
BUGS
Send bug reports to:
-James Morris <jmorris@redhat.com>
+Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@redhat.com>
@@ -134,13 +138,14 @@ FURTHER INFORMATION
For further patches and various updates, including the current TODO
list, see:
-http://samba.org/~jamesm/crypto/
+http://gondor.apana.org.au/~herbert/crypto/
AUTHORS
James Morris
David S. Miller
+Herbert Xu
CREDITS
@@ -238,8 +243,11 @@ Anubis algorithm contributors:
Tiger algorithm contributors:
Aaron Grothe
+VIA PadLock contributors:
+ Michal Ludvig
+
Generic scatterwalk code by Adam J. Richter <adam@yggdrasil.com>
Please send any credits updates or corrections to:
-James Morris <jmorris@redhat.com>
+Herbert Xu <herbert@gondor.apana.org.au>