1 files changed, 74 insertions, 0 deletions

diff --git a/src/microhttpd/sha256.h b/src/microhttpd/sha256.h
new file mode 100644
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+++ b/src/microhttpd/sha256.h
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+/* sha256.h
+
+   The sha256 hash function.
+
+   Copyright (C) 2001, 2012 Niels Möller
+   Copyright (C) 2018 Christian Grothoff (extraction of minimal subset
+     from GNU Nettle to work with GNU libmicrohttpd)
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+ 
+#ifndef NETTLE_SHA2_H_INCLUDED
+#define NETTLE_SHA2_H_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SHA256_DIGEST_SIZE 32
+#define SHA256_BLOCK_SIZE 64
+
+/* Digest is kept internally as 8 32-bit words. */
+#define _SHA256_DIGEST_LENGTH 8
+
+struct sha256_ctx
+{
+  uint32_t state[_SHA256_DIGEST_LENGTH];    /* State variables */
+  uint64_t count;                           /* 64-bit block count */
+  uint8_t block[SHA256_BLOCK_SIZE];          /* SHA256 data buffer */
+  unsigned int index;                       /* index into buffer */
+};
+
+void
+sha256_init(struct sha256_ctx *ctx);
+
+void
+sha256_update(struct sha256_ctx *ctx,
+              size_t length,
+              const uint8_t *data);
+
+void
+sha256_digest(struct sha256_ctx *ctx,
+              size_t length,
+              uint8_t *digest);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_SHA2_H_INCLUDED */