On recent s390 machines hardware acceleration is available for SHA-256.
SHA-224 is based on SHA-256 so it can also be accelerated by hardware.
Do this by adding the proper algorithm description and initialization.
Signed-off-by: Jan Glauber <[email protected]>
---
arch/s390/crypto/sha256_s390.c | 66 ++++++++++++++++++++++++++++++++++-------
1 file changed, 55 insertions(+), 11 deletions(-)
--- a/arch/s390/crypto/sha256_s390.c
+++ b/arch/s390/crypto/sha256_s390.c
@@ -1,15 +1,12 @@
/*
* Cryptographic API.
*
- * s390 implementation of the SHA256 Secure Hash Algorithm.
+ * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
*
* s390 Version:
- * Copyright IBM Corp. 2005,2007
+ * Copyright IBM Corp. 2005,2011
* Author(s): Jan Glauber ([email protected])
*
- * Derived from "crypto/sha256_generic.c"
- * and "arch/s390/crypto/sha1_s390.c"
- *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
@@ -65,7 +62,7 @@ static int sha256_import(struct shash_de
return 0;
}
-static struct shash_alg alg = {
+static struct shash_alg sha256_alg = {
.digestsize = SHA256_DIGEST_SIZE,
.init = sha256_init,
.update = s390_sha_update,
@@ -84,22 +81,69 @@ static struct shash_alg alg = {
}
};
-static int sha256_s390_init(void)
+static int sha224_init(struct shash_desc *desc)
{
+ struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+
+ sctx->state[0] = SHA224_H0;
+ sctx->state[1] = SHA224_H1;
+ sctx->state[2] = SHA224_H2;
+ sctx->state[3] = SHA224_H3;
+ sctx->state[4] = SHA224_H4;
+ sctx->state[5] = SHA224_H5;
+ sctx->state[6] = SHA224_H6;
+ sctx->state[7] = SHA224_H7;
+ sctx->count = 0;
+ sctx->func = KIMD_SHA_256;
+
+ return 0;
+}
+
+static struct shash_alg sha224_alg = {
+ .digestsize = SHA224_DIGEST_SIZE,
+ .init = sha224_init,
+ .update = s390_sha_update,
+ .final = s390_sha_final,
+ .export = sha256_export,
+ .import = sha256_import,
+ .descsize = sizeof(struct s390_sha_ctx),
+ .statesize = sizeof(struct sha256_state),
+ .base = {
+ .cra_name = "sha224",
+ .cra_driver_name= "sha224-s390",
+ .cra_priority = CRYPT_S390_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA224_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static int __init sha256_s390_init(void)
+{
+ int ret;
+
if (!crypt_s390_func_available(KIMD_SHA_256, CRYPT_S390_MSA))
return -EOPNOTSUPP;
-
- return crypto_register_shash(&alg);
+ ret = crypto_register_shash(&sha256_alg);
+ if (ret < 0)
+ goto out;
+ ret = crypto_register_shash(&sha224_alg);
+ if (ret < 0)
+ crypto_unregister_shash(&sha256_alg);
+out:
+ return ret;
}
static void __exit sha256_s390_fini(void)
{
- crypto_unregister_shash(&alg);
+ crypto_unregister_shash(&sha224_alg);
+ crypto_unregister_shash(&sha256_alg);
}
module_init(sha256_s390_init);
module_exit(sha256_s390_fini);
MODULE_ALIAS("sha256");
+MODULE_ALIAS("sha224");
MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm");
+MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");
On Wed, Jun 29, 2011 at 02:23:16PM +0200, Jan Glauber wrote:
> On recent s390 machines hardware acceleration is available for SHA-256.
> SHA-224 is based on SHA-256 so it can also be accelerated by hardware.
> Do this by adding the proper algorithm description and initialization.
>
> Signed-off-by: Jan Glauber <[email protected]>
Patch applied. Thanks Jan!
--
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt