[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>
diff --git a/Documentation/crypto/api-intro.txt b/Documentation/crypto/api-intro.txt
index 74dffc6..5a03a28 100644
--- a/Documentation/crypto/api-intro.txt
+++ b/Documentation/crypto/api-intro.txt
@@ -19,15 +19,14 @@
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 @@
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 @@
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 @@
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 @@
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>