Provide hardware state import/export functionality, as mandated by
commit 8996eafdcbad ("crypto: ahash - ensure statesize is non-zero")
Cc: <stable@xxxxxxxxxxxxxxx> # 4.3+
Reported-by: Jonas Eymann <J.Eymann@xxxxxxx>
Signed-off-by: Horia Geantă <horia.geanta@xxxxxxx>
---
drivers/crypto/talitos.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index aae05547b924..b7ee8d30147d 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -835,6 +835,16 @@ struct talitos_ahash_req_ctx {
struct scatterlist *psrc;
};
+struct talitos_export_state {
+ u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)];
+ u8 buf[HASH_MAX_BLOCK_SIZE];
+ unsigned int swinit;
+ unsigned int first;
+ unsigned int last;
+ unsigned int to_hash_later;
+ unsigned int nbuf;
+};
+
static int aead_setkey(struct crypto_aead *authenc,
const u8 *key, unsigned int keylen)
{
@@ -1981,6 +1991,46 @@ static int ahash_digest(struct ahash_request *areq)
return ahash_process_req(areq, areq->nbytes);
}
+static int ahash_export(struct ahash_request *areq, void *out)
+{
+ struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
+ struct talitos_export_state *export = out;
+
+ memcpy(export->hw_context, req_ctx->hw_context,
+ req_ctx->hw_context_size);
+ memcpy(export->buf, req_ctx->buf, req_ctx->nbuf);
+ export->swinit = req_ctx->swinit;
+ export->first = req_ctx->first;
+ export->last = req_ctx->last;
+ export->to_hash_later = req_ctx->to_hash_later;
+ export->nbuf = req_ctx->nbuf;
+
+ return 0;
+}
+
+static int ahash_import(struct ahash_request *areq, const void *in)
+{
+ struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ const struct talitos_export_state *export = in;
+
+ memset(req_ctx, 0, sizeof(*req_ctx));
+ req_ctx->hw_context_size =
+ (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
+ ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
+ : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
+ memcpy(req_ctx->hw_context, export->hw_context,
+ req_ctx->hw_context_size);
+ memcpy(req_ctx->buf, export->buf, export->nbuf);
+ req_ctx->swinit = export->swinit;
+ req_ctx->first = export->first;
+ req_ctx->last = export->last;
+ req_ctx->to_hash_later = export->to_hash_later;
+ req_ctx->nbuf = export->nbuf;
+
+ return 0;
+}
+
struct keyhash_result {
struct completion completion;
int err;
@@ -2458,6 +2508,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = MD5_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "md5",
.cra_driver_name = "md5-talitos",
@@ -2473,6 +2524,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "sha1",
.cra_driver_name = "sha1-talitos",
@@ -2488,6 +2540,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA224_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "sha224",
.cra_driver_name = "sha224-talitos",
@@ -2503,6 +2556,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "sha256",
.cra_driver_name = "sha256-talitos",
@@ -2518,6 +2572,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA384_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "sha384",
.cra_driver_name = "sha384-talitos",
@@ -2533,6 +2588,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA512_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "sha512",
.cra_driver_name = "sha512-talitos",
@@ -2548,6 +2604,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = MD5_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "hmac(md5)",
.cra_driver_name = "hmac-md5-talitos",
@@ -2563,6 +2620,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "hmac(sha1)",
.cra_driver_name = "hmac-sha1-talitos",
@@ -2578,6 +2636,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA224_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "hmac(sha224)",
.cra_driver_name = "hmac-sha224-talitos",
@@ -2593,6 +2652,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "hmac(sha256)",
.cra_driver_name = "hmac-sha256-talitos",
@@ -2608,6 +2668,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA384_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "hmac(sha384)",
.cra_driver_name = "hmac-sha384-talitos",
@@ -2623,6 +2684,7 @@ static struct talitos_alg_template driver_algs[] = {
{ .type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA512_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct talitos_export_state),
.halg.base = {
.cra_name = "hmac(sha512)",
.cra_driver_name = "hmac-sha512-talitos",
@@ -2814,6 +2876,8 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
t_alg->algt.alg.hash.finup = ahash_finup;
t_alg->algt.alg.hash.digest = ahash_digest;
t_alg->algt.alg.hash.setkey = ahash_setkey;
+ t_alg->algt.alg.hash.import = ahash_import;
+ t_alg->algt.alg.hash.export = ahash_export;
if (!(priv->features & TALITOS_FTR_HMAC_OK) &&
!strncmp(alg->cra_name, "hmac", 4)) {
--
2.4.4
--
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