Valerii Koval
34 lines
633 B
C
34 lines
633 B
C
/* coap_hashkey.c -- definition of hash key type and helper functions
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*
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* Copyright (C) 2010,2011 Olaf Bergmann <bergmann@tzi.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* This file is part of the CoAP library libcoap. Please see
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* README for terms of use.
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*/
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/**
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* @file coap_hashkey.c
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* @brief Hashkey functions
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*/
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#include "coap3/coap_internal.h"
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void
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coap_hash_impl(const unsigned char *s, size_t len, coap_key_t h) {
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size_t j;
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while (len--) {
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j = sizeof(coap_key_t)-1;
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while (j) {
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h[j] = ((h[j] << 7) | (h[j-1] >> 1)) + h[j];
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--j;
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}
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h[0] = (h[0] << 7) + h[0] + *s++;
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}
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}
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