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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-22 12:29:41 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-22 14:38:13 +0800 |
| commit | 9fadfd1adff28a8895de8df9e8a778c44958840f (patch) | |
| tree | 533d208b5852b883f5bcf2ff5f507bedb6d4ec9d | |
| parent | 13887ed6888dad1608eb9530ebd83b6ba29db577 (diff) | |
| download | linux-9fadfd1adff28a8895de8df9e8a778c44958840f.tar.bz2 | |
crypto: sha512-s390 - Add export/import support
This patch adds export/import support to sha512-s390 (which includes
sha384-s390). The exported type is defined by struct sha512_state,
which is basically the entire descriptor state of sha512_generic.
Since sha512-s390 only supports a 64-bit byte count the import
function will reject anything that exceeds that.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | arch/s390/crypto/sha512_s390.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/s390/crypto/sha512_s390.c b/arch/s390/crypto/sha512_s390.c index 83192bfc8048..b4b3438ae77e 100644 --- a/arch/s390/crypto/sha512_s390.c +++ b/arch/s390/crypto/sha512_s390.c @@ -13,7 +13,10 @@ * */ #include <crypto/internal/hash.h> +#include <crypto/sha.h> +#include <linux/errno.h> #include <linux/init.h> +#include <linux/kernel.h> #include <linux/module.h> #include "sha.h" @@ -37,12 +40,42 @@ static int sha512_init(struct shash_desc *desc) return 0; } +static int sha512_export(struct shash_desc *desc, void *out) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + struct sha512_state *octx = out; + + octx->count[0] = sctx->count; + octx->count[1] = 0; + memcpy(octx->state, sctx->state, sizeof(octx->state)); + memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); + return 0; +} + +static int sha512_import(struct shash_desc *desc, const u8 *in) +{ + struct s390_sha_ctx *sctx = shash_desc_ctx(desc); + struct sha512_state *ictx = in; + + if (unlikely(ictx->count[1])) + return -ERANGE; + sctx->count = ictx->count[0]; + + memcpy(sctx->state, ictx->state, sizeof(ictx->state)); + memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); + sctx->func = KIMD_SHA_512; + return 0; +} + static struct shash_alg sha512_alg = { .digestsize = SHA512_DIGEST_SIZE, .init = sha512_init, .update = s390_sha_update, .final = s390_sha_final, + .export = sha512_export, + .import = sha512_import, .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha512_state), .base = { .cra_name = "sha512", .cra_driver_name= "sha512-s390", @@ -78,7 +111,10 @@ static struct shash_alg sha384_alg = { .init = sha384_init, .update = s390_sha_update, .final = s390_sha_final, + .export = sha512_export, + .import = sha512_import, .descsize = sizeof(struct s390_sha_ctx), + .statesize = sizeof(struct sha512_state), .base = { .cra_name = "sha384", .cra_driver_name= "sha384-s390", |