import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/media/gmp/rlz/sha256.h

@@ -0,0 +1,46 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Stripped down version of security/nss/lib/freebl/blapi.h
+// and related headers.
+
+#ifndef _SHA256_H_
+#define _SHA256_H_
+
+#define SHA256_LENGTH 32 
+
+#include "prtypes.h"	/* for PRUintXX */
+#include "prlong.h"
+
+#ifdef __cplusplus 
+extern "C" {
+#endif
+
+struct SHA256Context {
+  union {
+    PRUint32 w[64];	    /* message schedule, input buffer, plus 48 words */
+    PRUint8  b[256];
+  } u;
+  PRUint32 h[8];		/* 8 state variables */
+  PRUint32 sizeHi,sizeLo;	/* 64-bit count of hashed bytes. */
+};
+
+typedef struct SHA256Context SHA256Context;
+
+extern void
+SHA256_Begin(SHA256Context *ctx);
+
+extern void 
+SHA256_Update(SHA256Context *ctx, const unsigned char *input,
+		    unsigned int inputLen);
+
+extern void
+SHA256_End(SHA256Context *ctx, unsigned char *digest,
+           unsigned int *digestLen, unsigned int maxDigestLen);
+
+#ifdef __cplusplus 
+} /* extern C */
+#endif
+
+#endif /* _SHA256_H_ */