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57 lines
2.6 KiB
57 lines
2.6 KiB
/*
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Copyright (c) 2014 Wirebird Labs LLC. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom
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the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#ifndef NN_SHA1_INCLUDED
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#define NN_SHA1_INCLUDED
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#include "../../utils/int.h"
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/*****************************************************************************/
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/* SHA-1 SECURITY NOTICE: */
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/* The algorithm as designed below is not intended for general purpose use. */
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/* As-designed, it is a single-purpose function for this WebSocket */
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/* Opening Handshake. As per RFC 6455 10.8, SHA-1 usage "doesn't depend on */
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/* any security properties of SHA-1, such as collision resistance or */
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/* resistance to the second pre-image attack (as described in [RFC4270])". */
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/* Caveat emptor for uses of this function elsewhere. */
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/* */
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/* Based on sha1.c (Public Domain) by Steve Reid, these functions calculate */
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/* the SHA1 hash of arbitrary byte locations byte-by-byte. */
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/*****************************************************************************/
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#define SHA1_HASH_LEN 20
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#define SHA1_BLOCK_LEN 64
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struct nn_sha1 {
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uint32_t buffer [SHA1_BLOCK_LEN / sizeof (uint32_t)];
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uint32_t state [SHA1_HASH_LEN / sizeof (uint32_t)];
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uint32_t bytes_hashed;
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uint8_t buffer_offset;
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uint8_t is_little_endian;
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};
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void nn_sha1_init (struct nn_sha1 *self);
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void nn_sha1_hashbyte (struct nn_sha1 *self, uint8_t data);
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uint8_t* nn_sha1_result (struct nn_sha1 *self);
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#endif
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