114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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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"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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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 THE
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* 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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/** \defgroup sha SHA and B64 helpers
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* ##SHA and B64 helpers
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*
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* These provide SHA-1 and B64 helper apis
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*/
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///@{
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#ifdef LWS_SHA1_USE_OPENSSL_NAME
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#define lws_SHA1 SHA1
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#else
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/**
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* lws_SHA1(): make a SHA-1 digest of a buffer
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*
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* \param d: incoming buffer
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* \param n: length of incoming buffer
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* \param md: buffer for message digest (must be >= 20 bytes)
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*
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* Reduces any size buffer into a 20-byte SHA-1 hash.
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*/
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LWS_VISIBLE LWS_EXTERN unsigned char *
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lws_SHA1(const unsigned char *d, size_t n, unsigned char *md);
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#endif
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/**
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* lws_b64_encode_string(): encode a string into base 64
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*
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* \param in: incoming buffer
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* \param in_len: length of incoming buffer
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* \param out: result buffer
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* \param out_size: length of result buffer
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*
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* Encodes a string using b64
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*/
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LWS_VISIBLE LWS_EXTERN int
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lws_b64_encode_string(const char *in, int in_len, char *out, int out_size);
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/**
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* lws_b64_encode_string_url(): encode a string into base 64
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*
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* \param in: incoming buffer
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* \param in_len: length of incoming buffer
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* \param out: result buffer
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* \param out_size: length of result buffer
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*
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* Encodes a string using b64 with the "URL" variant (+ -> -, and / -> _)
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*/
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LWS_VISIBLE LWS_EXTERN int
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lws_b64_encode_string_url(const char *in, int in_len, char *out, int out_size);
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/**
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* lws_b64_decode_string(): decode a string from base 64
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*
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* \param in: incoming buffer
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* \param out: result buffer
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* \param out_size: length of result buffer
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*
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* Decodes a NUL-terminated string using b64
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*
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* Returns used length of output buffer
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*/
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LWS_VISIBLE LWS_EXTERN int
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lws_b64_decode_string(const char *in, char *out, int out_size);
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/**
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* lws_b64_decode_string_len(): decode a string from base 64
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*
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* \param in: incoming buffer
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* \param in_len: length of incoming buffer
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* \param out: result buffer
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* \param out_size: length of result buffer
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*
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* Decodes a range of chars using b64
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*
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* Returns used length of output buffer
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*/
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LWS_VISIBLE LWS_EXTERN int
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lws_b64_decode_string_len(const char *in, int in_len, char *out, int out_size);
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struct lws_b64state {
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unsigned char quad[4];
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size_t done;
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size_t len;
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int i;
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int c;
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};
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LWS_VISIBLE LWS_EXTERN void
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lws_b64_decode_state_init(struct lws_b64state *state);
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LWS_VISIBLE LWS_EXTERN int
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lws_b64_decode_stateful(struct lws_b64state *s, const char *in, size_t *in_len,
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uint8_t *out, size_t *out_size, int final);
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///@}
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