[PATCH v2 3/3] PBL: add oneshot helper for sha384 and sha512

[Michael Tretter]

Similar to the oneshot helper for sha256, add helpers for sha384 and
sha512.

The helper functions don't use the ARMv8 Crypto Extensions, yet.

Signed-off-by: Michael Tretter <m.tretter at pengutronix.de>
---
Changes in v2:
- Move implementation from header to pbl/sha.c
---
 include/crypto/pbl-sha.h |  6 ++++++
 pbl/sha.c                | 30 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/include/crypto/pbl-sha.h b/include/crypto/pbl-sha.h
index dbfb79647462..dc5d5ccdadd6 100644
--- a/include/crypto/pbl-sha.h
+++ b/include/crypto/pbl-sha.h
@@ -28,7 +28,13 @@ int sha512_init(struct digest *desc);
 int sha512_update(struct digest *desc, const void *data, unsigned long len);
 int sha512_final(struct digest *desc, u8 *out);
 
+/* One-shot SHA-512 that picks the best transform available in the PBL. */
+void pbl_sha512(const void *buf, size_t len, u8 out[SHA512_DIGEST_SIZE]);
+
 int sha384_init(struct digest *desc);
 int sha384_final(struct digest *desc, u8 *out);
 
+/* One-shot SHA-384 that picks the best transform available in the PBL. */
+void pbl_sha384(const void *buf, size_t len, u8 out[SHA384_DIGEST_SIZE]);
+
 #endif /* __PBL-SHA_H_ */
diff --git a/pbl/sha.c b/pbl/sha.c
index f08e554ea4c8..81ffab9123dc 100644
--- a/pbl/sha.c
+++ b/pbl/sha.c
@@ -26,3 +26,33 @@ void pbl_sha256(const void *buf, size_t len, u8 out[static SHA256_DIGEST_SIZE])
 
 	pbl_sha256_generic(buf, len, out);
 }
+
+static void pbl_sha512_generic(const void *buf, size_t len, u8 *out)
+{
+	struct sha512_state state = { };
+	struct digest d = { .ctx = &state, .length = SHA512_DIGEST_SIZE };
+
+	sha512_init(&d);
+	sha512_update(&d, buf, len);
+	sha512_final(&d, out);
+}
+
+void pbl_sha512(const void *buf, size_t len, u8 out[static SHA512_DIGEST_SIZE])
+{
+	pbl_sha512_generic(buf, len, out);
+}
+
+static void pbl_sha384_generic(const void *buf, size_t len, u8 *out)
+{
+	struct sha512_state state = { };
+	struct digest d = { .ctx = &state, .length = SHA384_DIGEST_SIZE };
+
+	sha384_init(&d);
+	sha512_update(&d, buf, len);
+	sha384_final(&d, out);
+}
+
+void pbl_sha384(const void *buf, size_t len, u8 out[static SHA384_DIGEST_SIZE])
+{
+	pbl_sha384_generic(buf, len, out);
+}

-- 
2.47.3