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117 lines
4.3 KiB
C
117 lines
4.3 KiB
C
/*
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* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef OSSL_QUIC_RECORD_UTIL_H
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# define OSSL_QUIC_RECORD_UTIL_H
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# include <openssl/ssl.h>
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# include "internal/quic_types.h"
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# ifndef OPENSSL_NO_QUIC
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struct ossl_qrx_st;
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struct ossl_qtx_st;
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/*
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* QUIC Key Derivation Utilities
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* =============================
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*/
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/* HKDF-Extract(salt, IKM) (RFC 5869) */
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int ossl_quic_hkdf_extract(OSSL_LIB_CTX *libctx,
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const char *propq,
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const EVP_MD *md,
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const unsigned char *salt, size_t salt_len,
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const unsigned char *ikm, size_t ikm_len,
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unsigned char *out, size_t out_len);
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/*
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* A QUIC client sends its first INITIAL packet with a random DCID, which
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* is used to compute the secrets used for INITIAL packet encryption in both
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* directions (both client-to-server and server-to-client).
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*
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* This function performs the necessary DCID-based key derivation, and then
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* provides the derived key material for the INITIAL encryption level to a QRX
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* instance, a QTX instance, or both.
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*
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* This function derives the necessary key material and then:
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* - if qrx is non-NULL, provides the appropriate secret to it;
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* - if qtx is non-NULL, provides the appropriate secret to it.
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*
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* If both qrx and qtx are NULL, this is a no-op. This function is equivalent to
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* making the appropriate calls to ossl_qrx_provide_secret() and
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* ossl_qtx_provide_secret().
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*
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* It is possible to use a QRX or QTX without ever calling this, for example if
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* there is no desire to handle INITIAL packets (e.g. if a QRX/QTX is
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* instantiated to succeed a previous QRX/QTX and handle a connection which is
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* already established). However in this case you should make sure you call
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* ossl_qrx_discard_enc_level(); see the header for that function for more
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* details. Calling ossl_qtx_discard_enc_level() is not essential but could
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* protect against programming errors.
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*
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* Returns 1 on success or 0 on error.
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*/
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int ossl_quic_provide_initial_secret(OSSL_LIB_CTX *libctx,
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const char *propq,
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const QUIC_CONN_ID *dst_conn_id,
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int is_server,
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struct ossl_qrx_st *qrx,
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struct ossl_qtx_st *qtx);
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/*
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* QUIC Record Layer Ciphersuite Info
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* ==================================
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*/
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/* Available QUIC Record Layer (QRL) ciphersuites. */
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# define QRL_SUITE_AES128GCM 1 /* SHA256 */
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# define QRL_SUITE_AES256GCM 2 /* SHA384 */
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# define QRL_SUITE_CHACHA20POLY1305 3 /* SHA256 */
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/* Returns cipher name in bytes or NULL if suite ID is invalid. */
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const char *ossl_qrl_get_suite_cipher_name(uint32_t suite_id);
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/* Returns hash function name in bytes or NULL if suite ID is invalid. */
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const char *ossl_qrl_get_suite_md_name(uint32_t suite_id);
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/* Returns secret length in bytes or 0 if suite ID is invalid. */
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uint32_t ossl_qrl_get_suite_secret_len(uint32_t suite_id);
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/* Returns key length in bytes or 0 if suite ID is invalid. */
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uint32_t ossl_qrl_get_suite_cipher_key_len(uint32_t suite_id);
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/* Returns IV length in bytes or 0 if suite ID is invalid. */
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uint32_t ossl_qrl_get_suite_cipher_iv_len(uint32_t suite_id);
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/* Returns AEAD auth tag length in bytes or 0 if suite ID is invalid. */
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uint32_t ossl_qrl_get_suite_cipher_tag_len(uint32_t suite_id);
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/* Returns a QUIC_HDR_PROT_CIPHER_* value or 0 if suite ID is invalid. */
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uint32_t ossl_qrl_get_suite_hdr_prot_cipher_id(uint32_t suite_id);
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/* Returns header protection key length in bytes or 0 if suite ID is invalid. */
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uint32_t ossl_qrl_get_suite_hdr_prot_key_len(uint32_t suite_id);
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/*
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* Returns maximum number of packets which may be safely encrypted with a suite
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* or 0 if suite ID is invalid.
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*/
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uint64_t ossl_qrl_get_suite_max_pkt(uint32_t suite_id);
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/*
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* Returns maximum number of RX'd packets which may safely fail AEAD decryption
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* for a given suite or 0 if suite ID is invalid.
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*/
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uint64_t ossl_qrl_get_suite_max_forged_pkt(uint32_t suite_id);
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# endif
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#endif
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