chromium/third_party/boringssl/src/crypto/fipsmodule/tls/kdf.c.inc

/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    [email protected].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
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 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]). */

#include <assert.h>

#include <openssl/bytestring.h>
#include <openssl/digest.h>
#include <openssl/hkdf.h>
#include <openssl/hmac.h>
#include <openssl/mem.h>

#include "internal.h"
#include "../../internal.h"
#include "../service_indicator/internal.h"


// tls1_P_hash computes the TLS P_<hash> function as described in RFC 5246,
// section 5. It XORs |out_len| bytes to |out|, using |md| as the hash and
// |secret| as the secret. |label|, |seed1|, and |seed2| are concatenated to
// form the seed parameter. It returns true on success and false on failure.
static int tls1_P_hash(uint8_t *out, size_t out_len,
                       const EVP_MD *md,
                       const uint8_t *secret, size_t secret_len,
                       const char *label, size_t label_len,
                       const uint8_t *seed1, size_t seed1_len,
                       const uint8_t *seed2, size_t seed2_len) { … }

int CRYPTO_tls1_prf(const EVP_MD *digest,
                    uint8_t *out, size_t out_len,
                    const uint8_t *secret, size_t secret_len,
                    const char *label, size_t label_len,
                    const uint8_t *seed1, size_t seed1_len,
                    const uint8_t *seed2, size_t seed2_len) { … }

int CRYPTO_tls13_hkdf_expand_label(uint8_t *out, size_t out_len,
                                   const EVP_MD *digest,  //
                                   const uint8_t *secret, size_t secret_len,
                                   const uint8_t *label, size_t label_len,
                                   const uint8_t *hash, size_t hash_len) { … }