linux-kernel - [RESEND PATCH 05/10] crypto: sha256_generic: Export the Transform function

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Date:   Fri, 28 Jun 2019 09:57:40 +0530
From:   Keerthy <j-keerthy@...com>
To:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <robh+dt@...nel.org>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <t-kristo@...com>,
        <j-keerthy@...com>, <linux-crypto@...r.kernel.org>, <nm@...com>
Subject: [RESEND PATCH 05/10] crypto: sha256_generic: Export the Transform function

The transform function can be used as is by other crypto
drivers that need to transform the 256 bit key using cpu.
Hence export it.

Signed-off-by: Keerthy <j-keerthy@...com>
---
 crypto/sha256_generic.c | 3 ++-
 include/crypto/sha.h    | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c
index b7502a96a0d4..583a3c3b93e0 100644
--- a/crypto/sha256_generic.c
+++ b/crypto/sha256_generic.c
@@ -63,7 +63,7 @@ static inline void BLEND_OP(int I, u32 *W)
 	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
 }
 
-static void sha256_transform(u32 *state, const u8 *input)
+void sha256_transform(u32 *state, const u8 *input)
 {
 	u32 a, b, c, d, e, f, g, h, t1, t2;
 	u32 W[64];
@@ -225,6 +225,7 @@ static void sha256_transform(u32 *state, const u8 *input)
 	a = b = c = d = e = f = g = h = t1 = t2 = 0;
 	memzero_explicit(W, 64 * sizeof(u32));
 }
+EXPORT_SYMBOL(sha256_transform);
 
 static void sha256_generic_block_fn(struct sha256_state *sst, u8 const *src,
 				    int blocks)
diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index 8a46202b1857..6e04f412b0c2 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -95,6 +95,7 @@ struct sha512_state {
 
 struct shash_desc;
 
+extern void sha256_transform(u32 *state, const u8 *input);
 extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
 			      unsigned int len);
 
-- 
2.17.1