From: Hannes Reinecke <hare@suse.de>

Date: Mon, 14 Dec 2020 09:54:12 +0100

Subject: [PATCH 02/12] crypto: add crypto_has_kpp()

Patch-mainline: Submitted to linux-nvme, 2021-12-02

References: jsc#SLE-20183

Add helper function to determine if a given key-agreement protocol

primitive is supported.

Signed-off-by: Hannes Reinecke <hare@suse.de>

Reviewed-by: Sagi Grimberg <sagi@grimberg.me>

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>

Acked-by: Hannes Reinecke <hare@suse.com>

---

 crypto/kpp.c         | 6 ++++++

 include/crypto/kpp.h | 2 ++

 2 files changed, 8 insertions(+)

diff --git a/crypto/kpp.c b/crypto/kpp.c

index 313b2c699963..416e8a1a03ee 100644

--- a/crypto/kpp.c

+++ b/crypto/kpp.c

@@ -87,6 +87,12 @@ struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)

 }

 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);

+int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)

+{

+	return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);

+}

+EXPORT_SYMBOL_GPL(crypto_has_kpp);

+

 static void kpp_prepare_alg(struct kpp_alg *alg)

 {

 	struct crypto_alg *base = &alg->base;

diff --git a/include/crypto/kpp.h b/include/crypto/kpp.h

index cccceadc164b..24d01e9877c1 100644

--- a/include/crypto/kpp.h

+++ b/include/crypto/kpp.h

@@ -104,6 +104,8 @@ struct kpp_alg {

  */

 struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask);

+int crypto_has_kpp(const char *alg_name, u32 type, u32 mask);

+

 static inline struct crypto_tfm *crypto_kpp_tfm(struct crypto_kpp *tfm)

 {

 	return &tfm->base;

-- 

2.29.2