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authorHerbert Xu <herbert@gondor.apana.org.au>2016-02-01 21:36:50 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2016-02-06 15:33:11 +0800
commit8bc618d6a2e05f8f4d26d46b63d19ddfdcba7869 (patch)
treef168ba982680c17a402110d24b66607f3cec7b8e /Documentation/crypto/api-intro.txt
parent0660511c0beeccdc240479f29d5ecd8362115be3 (diff)
downloadop-kernel-dev-8bc618d6a2e05f8f4d26d46b63d19ddfdcba7869.zip
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crypto: doc - Use ahash
This patch replaces the crypto_hash example in api-intro.txt with crypto_ahash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/crypto/api-intro.txt')
-rw-r--r--Documentation/crypto/api-intro.txt23
1 files changed, 14 insertions, 9 deletions
diff --git a/Documentation/crypto/api-intro.txt b/Documentation/crypto/api-intro.txt
index 8b49302..beda682 100644
--- a/Documentation/crypto/api-intro.txt
+++ b/Documentation/crypto/api-intro.txt
@@ -49,28 +49,33 @@ under development.
Here's an example of how to use the API:
- #include <linux/crypto.h>
+ #include <crypto/ahash.h>
#include <linux/err.h>
#include <linux/scatterlist.h>
struct scatterlist sg[2];
char result[128];
- struct crypto_hash *tfm;
- struct hash_desc desc;
+ struct crypto_ahash *tfm;
+ struct ahash_request *req;
- tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
+ tfm = crypto_alloc_ahash("md5", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm))
fail();
/* ... set up the scatterlists ... */
- desc.tfm = tfm;
- desc.flags = 0;
-
- if (crypto_hash_digest(&desc, sg, 2, result))
+ req = ahash_request_alloc(tfm, GFP_ATOMIC);
+ if (!req)
fail();
+
+ ahash_request_set_callback(req, 0, NULL, NULL);
+ ahash_request_set_crypt(req, sg, result, 2);
- crypto_free_hash(tfm);
+ if (crypto_ahash_digest(req))
+ fail();
+
+ ahash_request_free(req);
+ crypto_free_ahash(tfm);
Many real examples are available in the regression test module (tcrypt.c).
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