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Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support

Retired package: Release invalid - Use 3.0.1 instead
Security advisory: This version has known vulnerabilities. View advisories
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hackney c_src lsquic src liblsquic lsquic_hkdf.c
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c_src/lsquic/src/liblsquic/lsquic_hkdf.c 

/* Copyright (c) 2017 - 2022 LiteSpeed Technologies Inc.  See LICENSE. */

#include <assert.h>

#include <stddef.h>

#include <string.h>



#include <openssl/hkdf.h>



#include "lsquic_hkdf.h"





/* [draft-ietf-quic-tls-17] Section 5 */

void

lsquic_qhkdf_expand (const EVP_MD *md, const unsigned char *secret,

            unsigned secret_len, const char *label, uint8_t label_len,

            unsigned char *out, uint16_t out_len)

{

#ifndef NDEBUG

    int s;

#endif

    const size_t len = 2 + 1 + 6 + label_len + 1;

#ifndef WIN32

    unsigned char info[ 2 + 1 + 6 + label_len + 1];

#else

    unsigned char info[ 2 + 1 + 6 + UINT8_MAX + 1];

#endif



    info[0] = out_len >> 8;

    info[1] = out_len;

    info[2] = label_len + 6;

    info[3] = 't';

    info[4] = 'l';

    info[5] = 's';

    info[6] = '1';

    info[7] = '3';

    info[8] = ' ';

    memcpy(info + 9, label, label_len);

    info[9 + label_len] = 0;

#ifndef NDEBUG

    s =

#else

    (void)

#endif

    HKDF_expand(out, out_len, md, secret, secret_len, info, len);

    assert(s);

}