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Diffstat (limited to 'kernel/drivers/crypto/ccp/ccp-crypto-sha.c')
-rw-r--r--kernel/drivers/crypto/ccp/ccp-crypto-sha.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/kernel/drivers/crypto/ccp/ccp-crypto-sha.c b/kernel/drivers/crypto/ccp/ccp-crypto-sha.c
index d14b3f28e..ab9945f2c 100644
--- a/kernel/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/kernel/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -207,6 +207,46 @@ static int ccp_sha_digest(struct ahash_request *req)
return ccp_sha_finup(req);
}
+static int ccp_sha_export(struct ahash_request *req, void *out)
+{
+ struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
+ struct ccp_sha_exp_ctx state;
+
+ /* Don't let anything leak to 'out' */
+ memset(&state, 0, sizeof(state));
+
+ state.type = rctx->type;
+ state.msg_bits = rctx->msg_bits;
+ state.first = rctx->first;
+ memcpy(state.ctx, rctx->ctx, sizeof(state.ctx));
+ state.buf_count = rctx->buf_count;
+ memcpy(state.buf, rctx->buf, sizeof(state.buf));
+
+ /* 'out' may not be aligned so memcpy from local variable */
+ memcpy(out, &state, sizeof(state));
+
+ return 0;
+}
+
+static int ccp_sha_import(struct ahash_request *req, const void *in)
+{
+ struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
+ struct ccp_sha_exp_ctx state;
+
+ /* 'in' may not be aligned so memcpy to local variable */
+ memcpy(&state, in, sizeof(state));
+
+ memset(rctx, 0, sizeof(*rctx));
+ rctx->type = state.type;
+ rctx->msg_bits = state.msg_bits;
+ rctx->first = state.first;
+ memcpy(rctx->ctx, state.ctx, sizeof(rctx->ctx));
+ rctx->buf_count = state.buf_count;
+ memcpy(rctx->buf, state.buf, sizeof(rctx->buf));
+
+ return 0;
+}
+
static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int key_len)
{
@@ -403,9 +443,12 @@ static int ccp_register_sha_alg(struct list_head *head,
alg->final = ccp_sha_final;
alg->finup = ccp_sha_finup;
alg->digest = ccp_sha_digest;
+ alg->export = ccp_sha_export;
+ alg->import = ccp_sha_import;
halg = &alg->halg;
halg->digestsize = def->digest_size;
+ halg->statesize = sizeof(struct ccp_sha_exp_ctx);
base = &halg->base;
snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);