From 41cf1d1e8a86c5c675982136f07c519c4b15b157 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 3 Sep 2020 12:05:04 +0100
Subject: crypto/krb5: Provide infrastructure and key derivation

Provide key derivation interface functions and a helper to implement the
PRF+ function from rfc4402.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org
---
 include/crypto/krb5.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include')

diff --git a/include/crypto/krb5.h b/include/crypto/krb5.h
index 81739e9828d3..b12f012cf354 100644
--- a/include/crypto/krb5.h
+++ b/include/crypto/krb5.h
@@ -139,4 +139,14 @@ int crypto_krb5_verify_mic(const struct krb5_enctype *krb5,
 			   struct scatterlist *sg, unsigned int nr_sg,
 			   size_t *_offset, size_t *_len);
 
+/*
+ * krb5_kdf.c
+ */
+int crypto_krb5_calc_PRFplus(const struct krb5_enctype *krb5,
+			     const struct krb5_buffer *K,
+			     unsigned int L,
+			     const struct krb5_buffer *S,
+			     struct krb5_buffer *result,
+			     gfp_t gfp);
+
 #endif /* _CRYPTO_KRB5_H */
-- 
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