1 files changed, 98 insertions, 0 deletions

diff --git a/src/microhttpd/sha1.h b/src/microhttpd/sha1.h
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+/*
+     This file is part of libmicrohttpd
+     Copyright (C) 2019-2021 Karlson2k (Evgeny Grin)
+
+     This library is free software; you can redistribute it and/or
+     modify it under the terms of the GNU Lesser General Public
+     License as published by the Free Software Foundation; either
+     version 2.1 of the License, or (at your option) any later version.
+
+     This library 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
+     Lesser General Public License for more details.
+
+     You should have received a copy of the GNU Lesser General Public
+     License along with this library.
+     If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file microhttpd/sha1.h
+ * @brief  Calculation of SHA-1 digest
+ * @author Karlson2k (Evgeny Grin)
+ */
+
+#ifndef MHD_SHA1_H
+#define MHD_SHA1_H 1
+
+#include "mhd_options.h"
+#include <stdint.h>
+#include <stddef.h>
+
+/**
+ *  SHA-1 digest is kept internally as 5 32-bit words.
+ */
+#define _SHA1_DIGEST_LENGTH 5
+
+/**
+ * Size of SHA-1 digest in bytes
+ */
+#define SHA1_DIGEST_SIZE (_SHA1_DIGEST_LENGTH * 4)
+
+/**
+ * Size of SHA-1 digest string in chars including termination NUL
+ */
+#define SHA1_DIGEST_STRING_SIZE ((SHA1_DIGEST_SIZE) * 2 + 1)
+
+/**
+ * Size of single processing block in bits
+ */
+#define SHA1_BLOCK_SIZE_BITS 512
+
+/**
+ * Size of single processing block in bytes
+ */
+#define SHA1_BLOCK_SIZE (SHA1_BLOCK_SIZE_BITS / 8)
+
+
+struct sha1_ctx
+{
+  uint32_t H[_SHA1_DIGEST_LENGTH];    /**< Intermediate hash value / digest at end of calculation */
+  uint8_t buffer[SHA1_BLOCK_SIZE];    /**< SHA256 input data buffer */
+  uint64_t count;                     /**< number of bytes, mod 2^64 */
+};
+
+/**
+ * Initialise structure for SHA-1 calculation.
+ *
+ * @param ctx must be a `struct sha1_ctx *`
+ */
+void
+MHD_SHA1_init (void *ctx_);
+
+
+/**
+ * Process portion of bytes.
+ *
+ * @param ctx_ must be a `struct sha1_ctx *`
+ * @param data bytes to add to hash
+ * @param length number of bytes in @a data
+ */
+void
+MHD_SHA1_update (void *ctx_,
+                 const uint8_t *data,
+                 size_t length);
+
+
+/**
+ * Finalise SHA-1 calculation, return digest.
+ *
+ * @param ctx_ must be a `struct sha1_ctx *`
+ * @param[out] digest set to the hash, must be #SHA1_DIGEST_SIZE bytes
+ */
+void
+MHD_SHA1_finish (void *ctx_,
+                 uint8_t digest[SHA1_DIGEST_SIZE]);
+
+#endif /* MHD_SHA1_H */