diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/include/mbedtls/ssl_internal.h')
| -rw-r--r-- | lib/mbedtls-2.27.0/include/mbedtls/ssl_internal.h | 1309 |
1 files changed, 0 insertions, 1309 deletions
diff --git a/lib/mbedtls-2.27.0/include/mbedtls/ssl_internal.h b/lib/mbedtls-2.27.0/include/mbedtls/ssl_internal.h deleted file mode 100644 index 2097a6d..0000000 --- a/lib/mbedtls-2.27.0/include/mbedtls/ssl_internal.h +++ /dev/null @@ -1,1309 +0,0 @@ -/** - * \file ssl_internal.h - * - * \brief Internal functions shared by the SSL modules - */ -/* - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef MBEDTLS_SSL_INTERNAL_H -#define MBEDTLS_SSL_INTERNAL_H - -#if !defined(MBEDTLS_CONFIG_FILE) -#include "mbedtls/config.h" -#else -#include MBEDTLS_CONFIG_FILE -#endif - -#include "mbedtls/ssl.h" -#include "mbedtls/cipher.h" - -#if defined(MBEDTLS_USE_PSA_CRYPTO) -#include "psa/crypto.h" -#endif - -#if defined(MBEDTLS_MD5_C) -#include "mbedtls/md5.h" -#endif - -#if defined(MBEDTLS_SHA1_C) -#include "mbedtls/sha1.h" -#endif - -#if defined(MBEDTLS_SHA256_C) -#include "mbedtls/sha256.h" -#endif - -#if defined(MBEDTLS_SHA512_C) -#include "mbedtls/sha512.h" -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) -#include "mbedtls/ecjpake.h" -#endif - -#if defined(MBEDTLS_USE_PSA_CRYPTO) -#include "psa/crypto.h" -#include "mbedtls/psa_util.h" -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - -#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \ - !defined(inline) && !defined(__cplusplus) -#define inline __inline -#endif - -/* Determine minimum supported version */ -#define MBEDTLS_SSL_MIN_MAJOR_VERSION MBEDTLS_SSL_MAJOR_VERSION_3 - -#if defined(MBEDTLS_SSL_PROTO_SSL3) -#define MBEDTLS_SSL_MIN_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_0 -#else -#if defined(MBEDTLS_SSL_PROTO_TLS1) -#define MBEDTLS_SSL_MIN_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_1 -#else -#if defined(MBEDTLS_SSL_PROTO_TLS1_1) -#define MBEDTLS_SSL_MIN_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_2 -#else -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#define MBEDTLS_SSL_MIN_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_3 -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_1 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1 */ -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - -#define MBEDTLS_SSL_MIN_VALID_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_1 -#define MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION MBEDTLS_SSL_MAJOR_VERSION_3 - -/* Determine maximum supported version */ -#define MBEDTLS_SSL_MAX_MAJOR_VERSION MBEDTLS_SSL_MAJOR_VERSION_3 - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#define MBEDTLS_SSL_MAX_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_3 -#else -#if defined(MBEDTLS_SSL_PROTO_TLS1_1) -#define MBEDTLS_SSL_MAX_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_2 -#else -#if defined(MBEDTLS_SSL_PROTO_TLS1) -#define MBEDTLS_SSL_MAX_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_1 -#else -#if defined(MBEDTLS_SSL_PROTO_SSL3) -#define MBEDTLS_SSL_MAX_MINOR_VERSION MBEDTLS_SSL_MINOR_VERSION_0 -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_1 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -/* Shorthand for restartable ECC */ -#if defined(MBEDTLS_ECP_RESTARTABLE) && \ - defined(MBEDTLS_SSL_CLI_C) && \ - defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ - defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) -#define MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED -#endif - -#define MBEDTLS_SSL_INITIAL_HANDSHAKE 0 -#define MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS 1 /* In progress */ -#define MBEDTLS_SSL_RENEGOTIATION_DONE 2 /* Done or aborted */ -#define MBEDTLS_SSL_RENEGOTIATION_PENDING 3 /* Requested (server only) */ - -/* - * DTLS retransmission states, see RFC 6347 4.2.4 - * - * The SENDING state is merged in PREPARING for initial sends, - * but is distinct for resends. - * - * Note: initial state is wrong for server, but is not used anyway. - */ -#define MBEDTLS_SSL_RETRANS_PREPARING 0 -#define MBEDTLS_SSL_RETRANS_SENDING 1 -#define MBEDTLS_SSL_RETRANS_WAITING 2 -#define MBEDTLS_SSL_RETRANS_FINISHED 3 - -/* - * Allow extra bytes for record, authentication and encryption overhead: - * counter (8) + header (5) + IV(16) + MAC (16-48) + padding (0-256) - * and allow for a maximum of 1024 of compression expansion if - * enabled. - */ -#if defined(MBEDTLS_ZLIB_SUPPORT) -#define MBEDTLS_SSL_COMPRESSION_ADD 1024 -#else -#define MBEDTLS_SSL_COMPRESSION_ADD 0 -#endif - -/* This macro determines whether CBC is supported. */ -#if defined(MBEDTLS_CIPHER_MODE_CBC) && \ - ( defined(MBEDTLS_AES_C) || \ - defined(MBEDTLS_CAMELLIA_C) || \ - defined(MBEDTLS_ARIA_C) || \ - defined(MBEDTLS_DES_C) ) -#define MBEDTLS_SSL_SOME_SUITES_USE_CBC -#endif - -/* This macro determines whether the CBC construct used in TLS 1.0-1.2 (as - * opposed to the very different CBC construct used in SSLv3) is supported. */ -#if defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC) && \ - ( defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_2) ) -#define MBEDTLS_SSL_SOME_SUITES_USE_TLS_CBC -#endif - -#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER) || \ - defined(MBEDTLS_SSL_SOME_SUITES_USE_CBC) -#define MBEDTLS_SSL_SOME_MODES_USE_MAC -#endif - -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) -/* Ciphersuites using HMAC */ -#if defined(MBEDTLS_SHA512_C) -#define MBEDTLS_SSL_MAC_ADD 48 /* SHA-384 used for HMAC */ -#elif defined(MBEDTLS_SHA256_C) -#define MBEDTLS_SSL_MAC_ADD 32 /* SHA-256 used for HMAC */ -#else -#define MBEDTLS_SSL_MAC_ADD 20 /* SHA-1 used for HMAC */ -#endif -#else /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ -/* AEAD ciphersuites: GCM and CCM use a 128 bits tag */ -#define MBEDTLS_SSL_MAC_ADD 16 -#endif - -#if defined(MBEDTLS_CIPHER_MODE_CBC) -#define MBEDTLS_SSL_PADDING_ADD 256 -#else -#define MBEDTLS_SSL_PADDING_ADD 0 -#endif - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) -#define MBEDTLS_SSL_MAX_CID_EXPANSION MBEDTLS_SSL_CID_PADDING_GRANULARITY -#else -#define MBEDTLS_SSL_MAX_CID_EXPANSION 0 -#endif - -#define MBEDTLS_SSL_PAYLOAD_OVERHEAD ( MBEDTLS_SSL_COMPRESSION_ADD + \ - MBEDTLS_MAX_IV_LENGTH + \ - MBEDTLS_SSL_MAC_ADD + \ - MBEDTLS_SSL_PADDING_ADD + \ - MBEDTLS_SSL_MAX_CID_EXPANSION \ - ) - -#define MBEDTLS_SSL_IN_PAYLOAD_LEN ( MBEDTLS_SSL_PAYLOAD_OVERHEAD + \ - ( MBEDTLS_SSL_IN_CONTENT_LEN ) ) - -#define MBEDTLS_SSL_OUT_PAYLOAD_LEN ( MBEDTLS_SSL_PAYLOAD_OVERHEAD + \ - ( MBEDTLS_SSL_OUT_CONTENT_LEN ) ) - -/* The maximum number of buffered handshake messages. */ -#define MBEDTLS_SSL_MAX_BUFFERED_HS 4 - -/* Maximum length we can advertise as our max content length for - RFC 6066 max_fragment_length extension negotiation purposes - (the lesser of both sizes, if they are unequal.) - */ -#define MBEDTLS_TLS_EXT_ADV_CONTENT_LEN ( \ - (MBEDTLS_SSL_IN_CONTENT_LEN > MBEDTLS_SSL_OUT_CONTENT_LEN) \ - ? ( MBEDTLS_SSL_OUT_CONTENT_LEN ) \ - : ( MBEDTLS_SSL_IN_CONTENT_LEN ) \ - ) - -/* Maximum size in bytes of list in sig-hash algorithm ext., RFC 5246 */ -#define MBEDTLS_SSL_MAX_SIG_HASH_ALG_LIST_LEN 65534 - -/* Maximum size in bytes of list in supported elliptic curve ext., RFC 4492 */ -#define MBEDTLS_SSL_MAX_CURVE_LIST_LEN 65535 - -/* - * Check that we obey the standard's message size bounds - */ - -#if MBEDTLS_SSL_MAX_CONTENT_LEN > 16384 -#error "Bad configuration - record content too large." -#endif - -#if MBEDTLS_SSL_IN_CONTENT_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN -#error "Bad configuration - incoming record content should not be larger than MBEDTLS_SSL_MAX_CONTENT_LEN." -#endif - -#if MBEDTLS_SSL_OUT_CONTENT_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN -#error "Bad configuration - outgoing record content should not be larger than MBEDTLS_SSL_MAX_CONTENT_LEN." -#endif - -#if MBEDTLS_SSL_IN_PAYLOAD_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN + 2048 -#error "Bad configuration - incoming protected record payload too large." -#endif - -#if MBEDTLS_SSL_OUT_PAYLOAD_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN + 2048 -#error "Bad configuration - outgoing protected record payload too large." -#endif - -/* Calculate buffer sizes */ - -/* Note: Even though the TLS record header is only 5 bytes - long, we're internally using 8 bytes to store the - implicit sequence number. */ -#define MBEDTLS_SSL_HEADER_LEN 13 - -#if !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) -#define MBEDTLS_SSL_IN_BUFFER_LEN \ - ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_IN_PAYLOAD_LEN ) ) -#else -#define MBEDTLS_SSL_IN_BUFFER_LEN \ - ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_IN_PAYLOAD_LEN ) \ - + ( MBEDTLS_SSL_CID_IN_LEN_MAX ) ) -#endif - -#if !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) -#define MBEDTLS_SSL_OUT_BUFFER_LEN \ - ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_OUT_PAYLOAD_LEN ) ) -#else -#define MBEDTLS_SSL_OUT_BUFFER_LEN \ - ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_OUT_PAYLOAD_LEN ) \ - + ( MBEDTLS_SSL_CID_OUT_LEN_MAX ) ) -#endif - -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) -static inline size_t mbedtls_ssl_get_output_buflen( const mbedtls_ssl_context *ctx ) -{ -#if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID) - return mbedtls_ssl_get_output_max_frag_len( ctx ) - + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD - + MBEDTLS_SSL_CID_OUT_LEN_MAX; -#else - return mbedtls_ssl_get_output_max_frag_len( ctx ) - + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD; -#endif -} - -static inline size_t mbedtls_ssl_get_input_buflen( const mbedtls_ssl_context *ctx ) -{ -#if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID) - return mbedtls_ssl_get_input_max_frag_len( ctx ) - + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD - + MBEDTLS_SSL_CID_IN_LEN_MAX; -#else - return mbedtls_ssl_get_input_max_frag_len( ctx ) - + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD; -#endif -} -#endif - -#ifdef MBEDTLS_ZLIB_SUPPORT -/* Compression buffer holds both IN and OUT buffers, so should be size of the larger */ -#define MBEDTLS_SSL_COMPRESS_BUFFER_LEN ( \ - ( MBEDTLS_SSL_IN_BUFFER_LEN > MBEDTLS_SSL_OUT_BUFFER_LEN ) \ - ? MBEDTLS_SSL_IN_BUFFER_LEN \ - : MBEDTLS_SSL_OUT_BUFFER_LEN \ - ) -#endif - -/* - * TLS extension flags (for extensions with outgoing ServerHello content - * that need it (e.g. for RENEGOTIATION_INFO the server already knows because - * of state of the renegotiation flag, so no indicator is required) - */ -#define MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS_PRESENT (1 << 0) -#define MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK (1 << 1) - -/** - * \brief This function checks if the remaining size in a buffer is - * greater or equal than a needed space. - * - * \param cur Pointer to the current position in the buffer. - * \param end Pointer to one past the end of the buffer. - * \param need Needed space in bytes. - * - * \return Zero if the needed space is available in the buffer, non-zero - * otherwise. - */ -static inline int mbedtls_ssl_chk_buf_ptr( const uint8_t *cur, - const uint8_t *end, size_t need ) -{ - return( ( cur > end ) || ( need > (size_t)( end - cur ) ) ); -} - -/** - * \brief This macro checks if the remaining size in a buffer is - * greater or equal than a needed space. If it is not the case, - * it returns an SSL_BUFFER_TOO_SMALL error. - * - * \param cur Pointer to the current position in the buffer. - * \param end Pointer to one past the end of the buffer. - * \param need Needed space in bytes. - * - */ -#define MBEDTLS_SSL_CHK_BUF_PTR( cur, end, need ) \ - do { \ - if( mbedtls_ssl_chk_buf_ptr( ( cur ), ( end ), ( need ) ) != 0 ) \ - { \ - return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ); \ - } \ - } while( 0 ) - -#ifdef __cplusplus -extern "C" { -#endif - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ - defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -/* - * Abstraction for a grid of allowed signature-hash-algorithm pairs. - */ -struct mbedtls_ssl_sig_hash_set_t -{ - /* At the moment, we only need to remember a single suitable - * hash algorithm per signature algorithm. As long as that's - * the case - and we don't need a general lookup function - - * we can implement the sig-hash-set as a map from signatures - * to hash algorithms. */ - mbedtls_md_type_t rsa; - mbedtls_md_type_t ecdsa; -}; -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 && - MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ - -typedef int mbedtls_ssl_tls_prf_cb( const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ); - -/* cipher.h exports the maximum IV, key and block length from - * all ciphers enabled in the config, regardless of whether those - * ciphers are actually usable in SSL/TLS. Notably, XTS is enabled - * in the default configuration and uses 64 Byte keys, but it is - * not used for record protection in SSL/TLS. - * - * In order to prevent unnecessary inflation of key structures, - * we introduce SSL-specific variants of the max-{key,block,IV} - * macros here which are meant to only take those ciphers into - * account which can be negotiated in SSL/TLS. - * - * Since the current definitions of MBEDTLS_MAX_{KEY|BLOCK|IV}_LENGTH - * in cipher.h are rough overapproximations of the real maxima, here - * we content ourselves with replicating those overapproximations - * for the maximum block and IV length, and excluding XTS from the - * computation of the maximum key length. */ -#define MBEDTLS_SSL_MAX_BLOCK_LENGTH 16 -#define MBEDTLS_SSL_MAX_IV_LENGTH 16 -#define MBEDTLS_SSL_MAX_KEY_LENGTH 32 - -/** - * \brief The data structure holding the cryptographic material (key and IV) - * used for record protection in TLS 1.3. - */ -struct mbedtls_ssl_key_set -{ - /*! The key for client->server records. */ - unsigned char client_write_key[ MBEDTLS_SSL_MAX_KEY_LENGTH ]; - /*! The key for server->client records. */ - unsigned char server_write_key[ MBEDTLS_SSL_MAX_KEY_LENGTH ]; - /*! The IV for client->server records. */ - unsigned char client_write_iv[ MBEDTLS_SSL_MAX_IV_LENGTH ]; - /*! The IV for server->client records. */ - unsigned char server_write_iv[ MBEDTLS_SSL_MAX_IV_LENGTH ]; - - size_t key_len; /*!< The length of client_write_key and - * server_write_key, in Bytes. */ - size_t iv_len; /*!< The length of client_write_iv and - * server_write_iv, in Bytes. */ -}; -typedef struct mbedtls_ssl_key_set mbedtls_ssl_key_set; - -/* - * This structure contains the parameters only needed during handshake. - */ -struct mbedtls_ssl_handshake_params -{ - /* - * Handshake specific crypto variables - */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ - defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) - mbedtls_ssl_sig_hash_set_t hash_algs; /*!< Set of suitable sig-hash pairs */ -#endif -#if defined(MBEDTLS_DHM_C) - mbedtls_dhm_context dhm_ctx; /*!< DHM key exchange */ -#endif -/* Adding guard for MBEDTLS_ECDSA_C to ensure no compile errors due - * to guards also being in ssl_srv.c and ssl_cli.c. There is a gap - * in functionality that access to ecdh_ctx structure is needed for - * MBEDTLS_ECDSA_C which does not seem correct. - */ -#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) - mbedtls_ecdh_context ecdh_ctx; /*!< ECDH key exchange */ - -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_key_type_t ecdh_psa_type; - uint16_t ecdh_bits; - psa_key_id_t ecdh_psa_privkey; - unsigned char ecdh_psa_peerkey[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; - size_t ecdh_psa_peerkey_len; -#endif /* MBEDTLS_USE_PSA_CRYPTO */ -#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */ - -#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) - mbedtls_ecjpake_context ecjpake_ctx; /*!< EC J-PAKE key exchange */ -#if defined(MBEDTLS_SSL_CLI_C) - unsigned char *ecjpake_cache; /*!< Cache for ClientHello ext */ - size_t ecjpake_cache_len; /*!< Length of cached data */ -#endif -#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */ -#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \ - defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) - const mbedtls_ecp_curve_info **curves; /*!< Supported elliptic curves */ -#endif -#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_key_id_t psk_opaque; /*!< Opaque PSK from the callback */ -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - unsigned char *psk; /*!< PSK from the callback */ - size_t psk_len; /*!< Length of PSK from callback */ -#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */ -#if defined(MBEDTLS_X509_CRT_PARSE_C) - mbedtls_ssl_key_cert *key_cert; /*!< chosen key/cert pair (server) */ -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - int sni_authmode; /*!< authmode from SNI callback */ - mbedtls_ssl_key_cert *sni_key_cert; /*!< key/cert list from SNI */ - mbedtls_x509_crt *sni_ca_chain; /*!< trusted CAs from SNI callback */ - mbedtls_x509_crl *sni_ca_crl; /*!< trusted CAs CRLs from SNI */ -#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - int ecrs_enabled; /*!< Handshake supports EC restart? */ - mbedtls_x509_crt_restart_ctx ecrs_ctx; /*!< restart context */ - enum { /* this complements ssl->state with info on intra-state operations */ - ssl_ecrs_none = 0, /*!< nothing going on (yet) */ - ssl_ecrs_crt_verify, /*!< Certificate: crt_verify() */ - ssl_ecrs_ske_start_processing, /*!< ServerKeyExchange: pk_verify() */ - ssl_ecrs_cke_ecdh_calc_secret, /*!< ClientKeyExchange: ECDH step 2 */ - ssl_ecrs_crt_vrfy_sign, /*!< CertificateVerify: pk_sign() */ - } ecrs_state; /*!< current (or last) operation */ - mbedtls_x509_crt *ecrs_peer_cert; /*!< The peer's CRT chain. */ - size_t ecrs_n; /*!< place for saving a length */ -#endif -#if defined(MBEDTLS_X509_CRT_PARSE_C) && \ - !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - mbedtls_pk_context peer_pubkey; /*!< The public key from the peer. */ -#endif /* MBEDTLS_X509_CRT_PARSE_C && !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#if defined(MBEDTLS_SSL_PROTO_DTLS) - unsigned int out_msg_seq; /*!< Outgoing handshake sequence number */ - unsigned int in_msg_seq; /*!< Incoming handshake sequence number */ - - unsigned char *verify_cookie; /*!< Cli: HelloVerifyRequest cookie - Srv: unused */ - unsigned char verify_cookie_len; /*!< Cli: cookie length - Srv: flag for sending a cookie */ - - uint32_t retransmit_timeout; /*!< Current value of timeout */ - unsigned char retransmit_state; /*!< Retransmission state */ - mbedtls_ssl_flight_item *flight; /*!< Current outgoing flight */ - mbedtls_ssl_flight_item *cur_msg; /*!< Current message in flight */ - unsigned char *cur_msg_p; /*!< Position in current message */ - unsigned int in_flight_start_seq; /*!< Minimum message sequence in the - flight being received */ - mbedtls_ssl_transform *alt_transform_out; /*!< Alternative transform for - resending messages */ - unsigned char alt_out_ctr[8]; /*!< Alternative record epoch/counter - for resending messages */ - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) - /* The state of CID configuration in this handshake. */ - - uint8_t cid_in_use; /*!< This indicates whether the use of the CID extension - * has been negotiated. Possible values are - * #MBEDTLS_SSL_CID_ENABLED and - * #MBEDTLS_SSL_CID_DISABLED. */ - unsigned char peer_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ]; /*! The peer's CID */ - uint8_t peer_cid_len; /*!< The length of - * \c peer_cid. */ -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - - struct - { - size_t total_bytes_buffered; /*!< Cumulative size of heap allocated - * buffers used for message buffering. */ - - uint8_t seen_ccs; /*!< Indicates if a CCS message has - * been seen in the current flight. */ - - struct mbedtls_ssl_hs_buffer - { - unsigned is_valid : 1; - unsigned is_fragmented : 1; - unsigned is_complete : 1; - unsigned char *data; - size_t data_len; - } hs[MBEDTLS_SSL_MAX_BUFFERED_HS]; - - struct - { - unsigned char *data; - size_t len; - unsigned epoch; - } future_record; - - } buffering; - - uint16_t mtu; /*!< Handshake mtu, used to fragment outgoing messages */ -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - - /* - * Checksum contexts - */ -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) - mbedtls_md5_context fin_md5; - mbedtls_sha1_context fin_sha1; -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_operation_t fin_sha256_psa; -#else - mbedtls_sha256_context fin_sha256; -#endif -#endif -#if defined(MBEDTLS_SHA512_C) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_operation_t fin_sha384_psa; -#else - mbedtls_sha512_context fin_sha512; -#endif -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - - void (*update_checksum)(mbedtls_ssl_context *, const unsigned char *, size_t); - void (*calc_verify)(const mbedtls_ssl_context *, unsigned char *, size_t *); - void (*calc_finished)(mbedtls_ssl_context *, unsigned char *, int); - mbedtls_ssl_tls_prf_cb *tls_prf; - - mbedtls_ssl_ciphersuite_t const *ciphersuite_info; - - size_t pmslen; /*!< premaster length */ - - unsigned char randbytes[64]; /*!< random bytes */ - unsigned char premaster[MBEDTLS_PREMASTER_SIZE]; - /*!< premaster secret */ - - int resume; /*!< session resume indicator*/ - int max_major_ver; /*!< max. major version client*/ - int max_minor_ver; /*!< max. minor version client*/ - int cli_exts; /*!< client extension presence*/ - -#if defined(MBEDTLS_SSL_SESSION_TICKETS) - int new_session_ticket; /*!< use NewSessionTicket? */ -#endif /* MBEDTLS_SSL_SESSION_TICKETS */ -#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) - int extended_ms; /*!< use Extended Master Secret? */ -#endif - -#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) - unsigned int async_in_progress : 1; /*!< an asynchronous operation is in progress */ -#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */ - -#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) - /** Asynchronous operation context. This field is meant for use by the - * asynchronous operation callbacks (mbedtls_ssl_config::f_async_sign_start, - * mbedtls_ssl_config::f_async_decrypt_start, - * mbedtls_ssl_config::f_async_resume, mbedtls_ssl_config::f_async_cancel). - * The library does not use it internally. */ - void *user_async_ctx; -#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */ -}; - -typedef struct mbedtls_ssl_hs_buffer mbedtls_ssl_hs_buffer; - -/* - * Representation of decryption/encryption transformations on records - * - * There are the following general types of record transformations: - * - Stream transformations (TLS versions <= 1.2 only) - * Transformation adding a MAC and applying a stream-cipher - * to the authenticated message. - * - CBC block cipher transformations ([D]TLS versions <= 1.2 only) - * In addition to the distinction of the order of encryption and - * authentication, there's a fundamental difference between the - * handling in SSL3 & TLS 1.0 and TLS 1.1 and TLS 1.2: For SSL3 - * and TLS 1.0, the final IV after processing a record is used - * as the IV for the next record. No explicit IV is contained - * in an encrypted record. The IV for the first record is extracted - * at key extraction time. In contrast, for TLS 1.1 and 1.2, no - * IV is generated at key extraction time, but every encrypted - * record is explicitly prefixed by the IV with which it was encrypted. - * - AEAD transformations ([D]TLS versions >= 1.2 only) - * These come in two fundamentally different versions, the first one - * used in TLS 1.2, excluding ChaChaPoly ciphersuites, and the second - * one used for ChaChaPoly ciphersuites in TLS 1.2 as well as for TLS 1.3. - * In the first transformation, the IV to be used for a record is obtained - * as the concatenation of an explicit, static 4-byte IV and the 8-byte - * record sequence number, and explicitly prepending this sequence number - * to the encrypted record. In contrast, in the second transformation - * the IV is obtained by XOR'ing a static IV obtained at key extraction - * time with the 8-byte record sequence number, without prepending the - * latter to the encrypted record. - * - * Additionally, DTLS 1.2 + CID as well as TLS 1.3 use an inner plaintext - * which allows to add flexible length padding and to hide a record's true - * content type. - * - * In addition to type and version, the following parameters are relevant: - * - The symmetric cipher algorithm to be used. - * - The (static) encryption/decryption keys for the cipher. - * - For stream/CBC, the type of message digest to be used. - * - For stream/CBC, (static) encryption/decryption keys for the digest. - * - For AEAD transformations, the size (potentially 0) of an explicit, - * random initialization vector placed in encrypted records. - * - For some transformations (currently AEAD and CBC in SSL3 and TLS 1.0) - * an implicit IV. It may be static (e.g. AEAD) or dynamic (e.g. CBC) - * and (if present) is combined with the explicit IV in a transformation- - * dependent way (e.g. appending in TLS 1.2 and XOR'ing in TLS 1.3). - * - For stream/CBC, a flag determining the order of encryption and MAC. - * - The details of the transformation depend on the SSL/TLS version. - * - The length of the authentication tag. - * - * Note: Except for CBC in SSL3 and TLS 1.0, these parameters are - * constant across multiple encryption/decryption operations. - * For CBC, the implicit IV needs to be updated after each - * operation. - * - * The struct below refines this abstract view as follows: - * - The cipher underlying the transformation is managed in - * cipher contexts cipher_ctx_{enc/dec}, which must have the - * same cipher type. The mode of these cipher contexts determines - * the type of the transformation in the sense above: e.g., if - * the type is MBEDTLS_CIPHER_AES_256_CBC resp. MBEDTLS_CIPHER_AES_192_GCM - * then the transformation has type CBC resp. AEAD. - * - The cipher keys are never stored explicitly but - * are maintained within cipher_ctx_{enc/dec}. - * - For stream/CBC transformations, the message digest contexts - * used for the MAC's are stored in md_ctx_{enc/dec}. These contexts - * are unused for AEAD transformations. - * - For stream/CBC transformations and versions > SSL3, the - * MAC keys are not stored explicitly but maintained within - * md_ctx_{enc/dec}. - * - For stream/CBC transformations and version SSL3, the MAC - * keys are stored explicitly in mac_enc, mac_dec and have - * a fixed size of 20 bytes. These fields are unused for - * AEAD transformations or transformations >= TLS 1.0. - * - For transformations using an implicit IV maintained within - * the transformation context, its contents are stored within - * iv_{enc/dec}. - * - The value of ivlen indicates the length of the IV. - * This is redundant in case of stream/CBC transformations - * which always use 0 resp. the cipher's block length as the - * IV length, but is needed for AEAD ciphers and may be - * different from the underlying cipher's block length - * in this case. - * - The field fixed_ivlen is nonzero for AEAD transformations only - * and indicates the length of the static part of the IV which is - * constant throughout the communication, and which is stored in - * the first fixed_ivlen bytes of the iv_{enc/dec} arrays. - * Note: For CBC in SSL3 and TLS 1.0, the fields iv_{enc/dec} - * still store IV's for continued use across multiple transformations, - * so it is not true that fixed_ivlen == 0 means that iv_{enc/dec} are - * not being used! - * - minor_ver denotes the SSL/TLS version - * - For stream/CBC transformations, maclen denotes the length of the - * authentication tag, while taglen is unused and 0. - * - For AEAD transformations, taglen denotes the length of the - * authentication tag, while maclen is unused and 0. - * - For CBC transformations, encrypt_then_mac determines the - * order of encryption and authentication. This field is unused - * in other transformations. - * - */ -struct mbedtls_ssl_transform -{ - /* - * Session specific crypto layer - */ - size_t minlen; /*!< min. ciphertext length */ - size_t ivlen; /*!< IV length */ - size_t fixed_ivlen; /*!< Fixed part of IV (AEAD) */ - size_t maclen; /*!< MAC(CBC) len */ - size_t taglen; /*!< TAG(AEAD) len */ - - unsigned char iv_enc[16]; /*!< IV (encryption) */ - unsigned char iv_dec[16]; /*!< IV (decryption) */ - -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) - -#if defined(MBEDTLS_SSL_PROTO_SSL3) - /* Needed only for SSL v3.0 secret */ - unsigned char mac_enc[20]; /*!< SSL v3.0 secret (enc) */ - unsigned char mac_dec[20]; /*!< SSL v3.0 secret (dec) */ -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - - mbedtls_md_context_t md_ctx_enc; /*!< MAC (encryption) */ - mbedtls_md_context_t md_ctx_dec; /*!< MAC (decryption) */ - -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - int encrypt_then_mac; /*!< flag for EtM activation */ -#endif - -#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ - - mbedtls_cipher_context_t cipher_ctx_enc; /*!< encryption context */ - mbedtls_cipher_context_t cipher_ctx_dec; /*!< decryption context */ - int minor_ver; - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) - uint8_t in_cid_len; - uint8_t out_cid_len; - unsigned char in_cid [ MBEDTLS_SSL_CID_OUT_LEN_MAX ]; - unsigned char out_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ]; -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - - /* - * Session specific compression layer - */ -#if defined(MBEDTLS_ZLIB_SUPPORT) - z_stream ctx_deflate; /*!< compression context */ - z_stream ctx_inflate; /*!< decompression context */ -#endif - -#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION) - /* We need the Hello random bytes in order to re-derive keys from the - * Master Secret and other session info, see ssl_populate_transform() */ - unsigned char randbytes[64]; /*!< ServerHello.random+ClientHello.random */ -#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */ -}; - -/* - * Return 1 if the transform uses an AEAD cipher, 0 otherwise. - * Equivalently, return 0 if a separate MAC is used, 1 otherwise. - */ -static inline int mbedtls_ssl_transform_uses_aead( - const mbedtls_ssl_transform *transform ) -{ -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) - return( transform->maclen == 0 && transform->taglen != 0 ); -#else - (void) transform; - return( 1 ); -#endif -} - -/* - * Internal representation of record frames - * - * Instances come in two flavors: - * (1) Encrypted - * These always have data_offset = 0 - * (2) Unencrypted - * These have data_offset set to the amount of - * pre-expansion during record protection. Concretely, - * this is the length of the fixed part of the explicit IV - * used for encryption, or 0 if no explicit IV is used - * (e.g. for CBC in TLS 1.0, or stream ciphers). - * - * The reason for the data_offset in the unencrypted case - * is to allow for in-place conversion of an unencrypted to - * an encrypted record. If the offset wasn't included, the - * encrypted content would need to be shifted afterwards to - * make space for the fixed IV. - * - */ -#if MBEDTLS_SSL_CID_OUT_LEN_MAX > MBEDTLS_SSL_CID_IN_LEN_MAX -#define MBEDTLS_SSL_CID_LEN_MAX MBEDTLS_SSL_CID_OUT_LEN_MAX -#else -#define MBEDTLS_SSL_CID_LEN_MAX MBEDTLS_SSL_CID_IN_LEN_MAX -#endif - -typedef struct -{ - uint8_t ctr[8]; /* In TLS: The implicit record sequence number. - * In DTLS: The 2-byte epoch followed by - * the 6-byte sequence number. - * This is stored as a raw big endian byte array - * as opposed to a uint64_t because we rarely - * need to perform arithmetic on this, but do - * need it as a Byte array for the purpose of - * MAC computations. */ - uint8_t type; /* The record content type. */ - uint8_t ver[2]; /* SSL/TLS version as present on the wire. - * Convert to internal presentation of versions - * using mbedtls_ssl_read_version() and - * mbedtls_ssl_write_version(). - * Keep wire-format for MAC computations. */ - - unsigned char *buf; /* Memory buffer enclosing the record content */ - size_t buf_len; /* Buffer length */ - size_t data_offset; /* Offset of record content */ - size_t data_len; /* Length of record content */ - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) - uint8_t cid_len; /* Length of the CID (0 if not present) */ - unsigned char cid[ MBEDTLS_SSL_CID_LEN_MAX ]; /* The CID */ -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ -} mbedtls_record; - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -/* - * List of certificate + private key pairs - */ -struct mbedtls_ssl_key_cert -{ - mbedtls_x509_crt *cert; /*!< cert */ - mbedtls_pk_context *key; /*!< private key */ - mbedtls_ssl_key_cert *next; /*!< next key/cert pair */ -}; -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -/* - * List of handshake messages kept around for resending - */ -struct mbedtls_ssl_flight_item -{ - unsigned char *p; /*!< message, including handshake headers */ - size_t len; /*!< length of p */ - unsigned char type; /*!< type of the message: handshake or CCS */ - mbedtls_ssl_flight_item *next; /*!< next handshake message(s) */ -}; -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ - defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) - -/* Find an entry in a signature-hash set matching a given hash algorithm. */ -mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set, - mbedtls_pk_type_t sig_alg ); -/* Add a signature-hash-pair to a signature-hash set */ -void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set, - mbedtls_pk_type_t sig_alg, - mbedtls_md_type_t md_alg ); -/* Allow exactly one hash algorithm for each signature. */ -void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set, - mbedtls_md_type_t md_alg ); - -/* Setup an empty signature-hash set */ -static inline void mbedtls_ssl_sig_hash_set_init( mbedtls_ssl_sig_hash_set_t *set ) -{ - mbedtls_ssl_sig_hash_set_const_hash( set, MBEDTLS_MD_NONE ); -} - -#endif /* MBEDTLS_SSL_PROTO_TLS1_2) && - MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ - -/** - * \brief Free referenced items in an SSL transform context and clear - * memory - * - * \param transform SSL transform context - */ -void mbedtls_ssl_transform_free( mbedtls_ssl_transform *transform ); - -/** - * \brief Free referenced items in an SSL handshake context and clear - * memory - * - * \param ssl SSL context - */ -void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl ); -void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl ); - -void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_handle_message_type( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_prepare_handshake_record( mbedtls_ssl_context *ssl ); -void mbedtls_ssl_update_handshake_status( mbedtls_ssl_context *ssl ); - -/** - * \brief Update record layer - * - * This function roughly separates the implementation - * of the logic of (D)TLS from the implementation - * of the secure transport. - * - * \param ssl The SSL context to use. - * \param update_hs_digest This indicates if the handshake digest - * should be automatically updated in case - * a handshake message is found. - * - * \return 0 or non-zero error code. - * - * \note A clarification on what is called 'record layer' here - * is in order, as many sensible definitions are possible: - * - * The record layer takes as input an untrusted underlying - * transport (stream or datagram) and transforms it into - * a serially multiplexed, secure transport, which - * conceptually provides the following: - * - * (1) Three datagram based, content-agnostic transports - * for handshake, alert and CCS messages. - * (2) One stream- or datagram-based transport - * for application data. - * (3) Functionality for changing the underlying transform - * securing the contents. - * - * The interface to this functionality is given as follows: - * - * a Updating - * [Currently implemented by mbedtls_ssl_read_record] - * - * Check if and on which of the four 'ports' data is pending: - * Nothing, a controlling datagram of type (1), or application - * data (2). In any case data is present, internal buffers - * provide access to the data for the user to process it. - * Consumption of type (1) datagrams is done automatically - * on the next update, invalidating that the internal buffers - * for previous datagrams, while consumption of application - * data (2) is user-controlled. - * - * b Reading of application data - * [Currently manual adaption of ssl->in_offt pointer] - * - * As mentioned in the last paragraph, consumption of data - * is different from the automatic consumption of control - * datagrams (1) because application data is treated as a stream. - * - * c Tracking availability of application data - * [Currently manually through decreasing ssl->in_msglen] - * - * For efficiency and to retain datagram semantics for - * application data in case of DTLS, the record layer - * provides functionality for checking how much application - * data is still available in the internal buffer. - * - * d Changing the transformation securing the communication. - * - * Given an opaque implementation of the record layer in the - * above sense, it should be possible to implement the logic - * of (D)TLS on top of it without the need to know anything - * about the record layer's internals. This is done e.g. - * in all the handshake handling functions, and in the - * application data reading function mbedtls_ssl_read. - * - * \note The above tries to give a conceptual picture of the - * record layer, but the current implementation deviates - * from it in some places. For example, our implementation of - * the update functionality through mbedtls_ssl_read_record - * discards datagrams depending on the current state, which - * wouldn't fall under the record layer's responsibility - * following the above definition. - * - */ -int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl, - unsigned update_hs_digest ); -int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want ); - -int mbedtls_ssl_write_handshake_msg( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush ); -int mbedtls_ssl_flush_output( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_parse_change_cipher_spec( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_write_change_cipher_spec( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl ); - -void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl, - const mbedtls_ssl_ciphersuite_t *ciphersuite_info ); - -#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) -int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex ); - -/** - * Get the first defined PSK by order of precedence: - * 1. handshake PSK set by \c mbedtls_ssl_set_hs_psk() in the PSK callback - * 2. static PSK configured by \c mbedtls_ssl_conf_psk() - * Return a code and update the pair (PSK, PSK length) passed to this function - */ -static inline int mbedtls_ssl_get_psk( const mbedtls_ssl_context *ssl, - const unsigned char **psk, size_t *psk_len ) -{ - if( ssl->handshake->psk != NULL && ssl->handshake->psk_len > 0 ) - { - *psk = ssl->handshake->psk; - *psk_len = ssl->handshake->psk_len; - } - - else if( ssl->conf->psk != NULL && ssl->conf->psk_len > 0 ) - { - *psk = ssl->conf->psk; - *psk_len = ssl->conf->psk_len; - } - - else - { - *psk = NULL; - *psk_len = 0; - return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED ); - } - - return( 0 ); -} - -#if defined(MBEDTLS_USE_PSA_CRYPTO) -/** - * Get the first defined opaque PSK by order of precedence: - * 1. handshake PSK set by \c mbedtls_ssl_set_hs_psk_opaque() in the PSK - * callback - * 2. static PSK configured by \c mbedtls_ssl_conf_psk_opaque() - * Return an opaque PSK - */ -static inline psa_key_id_t mbedtls_ssl_get_opaque_psk( - const mbedtls_ssl_context *ssl ) -{ - if( ! mbedtls_svc_key_id_is_null( ssl->handshake->psk_opaque ) ) - return( ssl->handshake->psk_opaque ); - - if( ! mbedtls_svc_key_id_is_null( ssl->conf->psk_opaque ) ) - return( ssl->conf->psk_opaque ); - - return( MBEDTLS_SVC_KEY_ID_INIT ); -} -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - -#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */ - -#if defined(MBEDTLS_PK_C) -unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk ); -unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type ); -mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig ); -#endif - -mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash ); -unsigned char mbedtls_ssl_hash_from_md_alg( int md ); -int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md ); - -#if defined(MBEDTLS_ECP_C) -int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id ); -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl, - mbedtls_md_type_t md ); -#endif - -#if defined(MBEDTLS_SSL_DTLS_SRTP) -static inline mbedtls_ssl_srtp_profile mbedtls_ssl_check_srtp_profile_value - ( const uint16_t srtp_profile_value ) -{ - switch( srtp_profile_value ) - { - case MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_80: - case MBEDTLS_TLS_SRTP_AES128_CM_HMAC_SHA1_32: - case MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_80: - case MBEDTLS_TLS_SRTP_NULL_HMAC_SHA1_32: - return srtp_profile_value; - default: break; - } - return( MBEDTLS_TLS_SRTP_UNSET ); -} -#endif - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -static inline mbedtls_pk_context *mbedtls_ssl_own_key( mbedtls_ssl_context *ssl ) -{ - mbedtls_ssl_key_cert *key_cert; - - if( ssl->handshake != NULL && ssl->handshake->key_cert != NULL ) - key_cert = ssl->handshake->key_cert; - else - key_cert = ssl->conf->key_cert; - - return( key_cert == NULL ? NULL : key_cert->key ); -} - -static inline mbedtls_x509_crt *mbedtls_ssl_own_cert( mbedtls_ssl_context *ssl ) -{ - mbedtls_ssl_key_cert *key_cert; - - if( ssl->handshake != NULL && ssl->handshake->key_cert != NULL ) - key_cert = ssl->handshake->key_cert; - else - key_cert = ssl->conf->key_cert; - - return( key_cert == NULL ? NULL : key_cert->cert ); -} - -/* - * Check usage of a certificate wrt extensions: - * keyUsage, extendedKeyUsage (later), and nSCertType (later). - * - * Warning: cert_endpoint is the endpoint of the cert (ie, of our peer when we - * check a cert we received from them)! - * - * Return 0 if everything is OK, -1 if not. - */ -int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert, - const mbedtls_ssl_ciphersuite_t *ciphersuite, - int cert_endpoint, - uint32_t *flags ); -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -void mbedtls_ssl_write_version( int major, int minor, int transport, - unsigned char ver[2] ); -void mbedtls_ssl_read_version( int *major, int *minor, int transport, - const unsigned char ver[2] ); - -static inline size_t mbedtls_ssl_in_hdr_len( const mbedtls_ssl_context *ssl ) -{ -#if !defined(MBEDTLS_SSL_PROTO_DTLS) - ((void) ssl); -#endif - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - { - return( 13 ); - } - else -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - { - return( 5 ); - } -} - -static inline size_t mbedtls_ssl_out_hdr_len( const mbedtls_ssl_context *ssl ) -{ - return( (size_t) ( ssl->out_iv - ssl->out_hdr ) ); -} - -static inline size_t mbedtls_ssl_hs_hdr_len( const mbedtls_ssl_context *ssl ) -{ -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - return( 12 ); -#else - ((void) ssl); -#endif - return( 4 ); -} - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -void mbedtls_ssl_send_flight_completed( mbedtls_ssl_context *ssl ); -void mbedtls_ssl_recv_flight_completed( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_resend( mbedtls_ssl_context *ssl ); -int mbedtls_ssl_flight_transmit( mbedtls_ssl_context *ssl ); -#endif - -/* Visible for testing purposes only */ -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) -int mbedtls_ssl_dtls_replay_check( mbedtls_ssl_context const *ssl ); -void mbedtls_ssl_dtls_replay_update( mbedtls_ssl_context *ssl ); -#endif - -int mbedtls_ssl_session_copy( mbedtls_ssl_session *dst, - const mbedtls_ssl_session *src ); - -/* constant-time buffer comparison */ -static inline int mbedtls_ssl_safer_memcmp( const void *a, const void *b, size_t n ) -{ - size_t i; - volatile const unsigned char *A = (volatile const unsigned char *) a; - volatile const unsigned char *B = (volatile const unsigned char *) b; - volatile unsigned char diff = 0; - - for( i = 0; i < n; i++ ) - { - /* Read volatile data in order before computing diff. - * This avoids IAR compiler warning: - * 'the order of volatile accesses is undefined ..' */ - unsigned char x = A[i], y = B[i]; - diff |= x ^ y; - } - - return( diff ); -} - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) -int mbedtls_ssl_get_key_exchange_md_ssl_tls( mbedtls_ssl_context *ssl, - unsigned char *output, - unsigned char *data, size_t data_len ); -#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \ - MBEDTLS_SSL_PROTO_TLS1_1 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_2) -/* The hash buffer must have at least MBEDTLS_MD_MAX_SIZE bytes of length. */ -int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl, - unsigned char *hash, size_t *hashlen, - unsigned char *data, size_t data_len, - mbedtls_md_type_t md_alg ); -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \ - MBEDTLS_SSL_PROTO_TLS1_2 */ - -#ifdef __cplusplus -} -#endif - -void mbedtls_ssl_transform_init( mbedtls_ssl_transform *transform ); -int mbedtls_ssl_encrypt_buf( mbedtls_ssl_context *ssl, - mbedtls_ssl_transform *transform, - mbedtls_record *rec, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng ); -int mbedtls_ssl_decrypt_buf( mbedtls_ssl_context const *ssl, - mbedtls_ssl_transform *transform, - mbedtls_record *rec ); - -/* Length of the "epoch" field in the record header */ -static inline size_t mbedtls_ssl_ep_len( const mbedtls_ssl_context *ssl ) -{ -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - return( 2 ); -#else - ((void) ssl); -#endif - return( 0 ); -} - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -int mbedtls_ssl_resend_hello_request( mbedtls_ssl_context *ssl ); -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -void mbedtls_ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs ); -int mbedtls_ssl_check_timer( mbedtls_ssl_context *ssl ); - -void mbedtls_ssl_reset_in_out_pointers( mbedtls_ssl_context *ssl ); -void mbedtls_ssl_update_out_pointers( mbedtls_ssl_context *ssl, - mbedtls_ssl_transform *transform ); -void mbedtls_ssl_update_in_pointers( mbedtls_ssl_context *ssl ); - -int mbedtls_ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial ); - -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) -void mbedtls_ssl_dtls_replay_reset( mbedtls_ssl_context *ssl ); -#endif - -void mbedtls_ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl ); - -#if defined(MBEDTLS_SSL_RENEGOTIATION) -int mbedtls_ssl_start_renegotiation( mbedtls_ssl_context *ssl ); -#endif /* MBEDTLS_SSL_RENEGOTIATION */ - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -size_t mbedtls_ssl_get_current_mtu( const mbedtls_ssl_context *ssl ); -void mbedtls_ssl_buffering_free( mbedtls_ssl_context *ssl ); -void mbedtls_ssl_flight_free( mbedtls_ssl_flight_item *flight ); -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -#endif /* ssl_internal.h */ |