[PATCHv3 03/11] crypto: omap-sham: implement context export/import APIs
From: Tero Kristo <hidden>
Date: 2016-08-04 10:28:38
Also in:
linux-crypto, linux-omap
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
Context export/import are now required for ahash algorithms due to required support in algif_hash. Implement these for OMAP SHA driver, saving and restoring the internal state of the driver. Signed-off-by: Tero Kristo <redacted> --- drivers/crypto/omap-sham.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 6e53944..aa71e61 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c@@ -1379,6 +1379,27 @@ exit_unlock: return ret; } +static int omap_sham_export(struct ahash_request *req, void *out) +{ + struct omap_sham_reqctx *rctx = ahash_request_ctx(req); + + while (omap_sham_flush(req) == -EINPROGRESS) + msleep(10); + + memcpy(out, rctx, sizeof(*rctx) + SHA512_BLOCK_SIZE); + + return 0; +} + +static int omap_sham_import(struct ahash_request *req, const void *in) +{ + struct omap_sham_reqctx *rctx = ahash_request_ctx(req); + + memcpy(rctx, in, sizeof(*rctx) + SHA512_BLOCK_SIZE); + + return 0; +} + static struct ahash_alg algs_sha1_md5[] = { { .init = omap_sham_init,
@@ -2037,8 +2058,14 @@ static int omap_sham_probe(struct platform_device *pdev) for (i = 0; i < dd->pdata->algs_info_size; i++) { for (j = 0; j < dd->pdata->algs_info[i].size; j++) { - err = crypto_register_ahash( - &dd->pdata->algs_info[i].algs_list[j]); + struct ahash_alg *alg; + + alg = &dd->pdata->algs_info[i].algs_list[j]; + alg->export = omap_sham_export; + alg->import = omap_sham_import; + alg->halg.statesize = sizeof(struct omap_sham_reqctx) + + SHA512_BLOCK_SIZE; + err = crypto_register_ahash(alg); if (err) goto err_algs;
--
1.9.1