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Improve doc'n of config-identifying bitfield in serialized session
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Hanno Becker
Jarno Lamsa
parent
f37d91830a
commit
50b596666d
@ -9849,122 +9849,103 @@ const mbedtls_ssl_session *mbedtls_ssl_get_session_pointer( const mbedtls_ssl_co
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*/
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/*
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* Define bitflag determining structure of mbedtls_ssl_session.
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* Define bitflag determining compile-time settings influencing
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* structure of serialized SSL sessions.
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*/
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#if defined(MBEDTLS_HAVE_TIME)
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#define SSL_SERIALIZED_SESSION_STRUCT_TIME_BIT 1
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#if defined(MBEDTLS_SSL_SERIALIZED_STRUCTURES_LOCAL_ONLY)
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#define SSL_SERIALIZED_SESSION_CONFIG_LOCAL 1
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#else
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#define SSL_SERIALIZED_SESSION_STRUCT_TIME_BIT 0
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#define SSL_SERIALIZED_SESSION_CONFIG_LOCAL 0
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#endif /* MBEDTLS_SSL_SERIALIZED_STRUCTURES_LOCAL_ONLY */
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#if defined(MBEDTLS_HAVE_TIME)
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#define SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT 1
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#else
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#define SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT 0
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#endif /* MBEDTLS_HAVE_TIME */
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#if defined(MBEDTLS_X509_CRT_PARSE_C)
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#define SSL_SERIALIZED_SESSION_STRUCT_CRT_BIT 1
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#define SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT 1
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#else
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#define SSL_SERIALIZED_SESSION_STRUCT_CRT_BIT 0
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#define SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT 0
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#endif /* MBEDTLS_X509_CRT_PARSE_C */
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#if defined(MBEDTLS_SSL_CLI_C) && defined(MBEDTLS_SSL_SESSION_TICKETS)
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#define SSL_SERIALIZED_SESSION_STRUCT_CLIENT_BIT 1
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#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT 1
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#else
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#define SSL_SERIALIZED_SESSION_STRUCT_CLIENT_BIT 0
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#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT 0
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#endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_SESSION_TICKETS */
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#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
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#define SSL_SERIALIZED_SESSION_STRUCT_MFL_BIT 1
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#define SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT 1
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#else
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#define SSL_SERIALIZED_SESSION_STRUCT_MFL_BIT 0
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#define SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT 0
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#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
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#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
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#define SSL_SERIALIZED_SESSION_STRUCT_TRUNC_HMAC_BIT 1
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#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT 1
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#else
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#define SSL_SERIALIZED_SESSION_STRUCT_TRUNC_HMAC_BIT 0
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#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT 0
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#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
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#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
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#define SSL_SERIALIZED_SESSION_STRUCT_ETM_BIT 1
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#define SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT 1
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#else
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#define SSL_SERIALIZED_SESSION_STRUCT_ETM_BIT 0
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#define SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT 0
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#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
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#define SSL_SERIALIZED_SESSION_STRUCT_BYTE \
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( (uint8_t) ( ( SSL_SERIALIZED_SESSION_STRUCT_TIME_BIT << 0 ) | \
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( SSL_SERIALIZED_SESSION_STRUCT_CRT_BIT << 1 ) | \
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( SSL_SERIALIZED_SESSION_STRUCT_CLIENT_BIT << 2 ) | \
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( SSL_SERIALIZED_SESSION_STRUCT_MFL_BIT << 3 ) | \
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( SSL_SERIALIZED_SESSION_STRUCT_TRUNC_HMAC_BIT << 4 ) | \
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( SSL_SERIALIZED_SESSION_STRUCT_ETM_BIT << 5 ) ) )
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/*
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* Define bitflag determining compile-time settings influencing
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* structure of the ticket outside of the session structure.
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*/
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#if defined(MBEDTLS_X509_CRT_PARSE_C)
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#define SSL_SERIALIZED_SESSION_CONFIG_CRT 1
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#else
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#define SSL_SERIALIZED_SESSION_CONFIG_CRT 0
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#endif /* MBEDTLS_X509_CRT_PARSE_C */
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#if defined(MBEDTLS_SSL_SESSION_TICKETS)
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#define SSL_SERIALIZED_SESSION_CONFIG_TICKET 1
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#else
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#define SSL_SERIALIZED_SESSION_CONFIG_TICKET 0
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#endif /* MBEDTLS_SSL_SESSION_TICKETS */
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#define SSL_SERIALIZED_SESSION_CONFIG_BYTE \
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( (uint8_t) ( ( SSL_SERIALIZED_SESSION_CONFIG_CRT << 0 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_TICKET << 1 ) ) )
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#define SSL_SERIALIZED_SESSION_CONFIG_BITFLAG \
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( (uint16_t) ( ( SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT << 0 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT << 1 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT << 2 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT << 3 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT << 4 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT << 5 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_CRT << 6 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_TICKET << 7 ) | \
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( SSL_SERIALIZED_SESSION_CONFIG_LOCAL << 8 ) ) )
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static unsigned char ssl_serialized_session_header[] = {
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MBEDTLS_VERSION_MAJOR,
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MBEDTLS_VERSION_MINOR,
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MBEDTLS_VERSION_PATCH,
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SSL_SERIALIZED_SESSION_STRUCT_BYTE,
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SSL_SERIALIZED_SESSION_CONFIG_BYTE
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( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 8 ) & 0xFF,
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( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 0 ) & 0xFF,
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};
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/*
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* Serialize a session in the following format:
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* (in the presentation language of TLS, RFC 8446 section 3)
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*
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* opaque mbedtls_version[3]; // major, minor, patch
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* opaque session_format[2]; // version-specific 16-bit field determining
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* // the format of the remaining serialized
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* // data. For example, it could be a bitfield
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* // indicating the setting of those compile-
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* // time configuration options influencing
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* // the format of the serialized data.
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* //
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* // In this version, we use:
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* // - Bits 8-15 (second byte)
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* // Bitflag determining structure of
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* // mbedtls_ssl_session
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* // - Bit 0:
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* // 0/1 depending on state of
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* // MBEDTLS_X509_CRT_PARSE_C.
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* // This determines whether the session
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* // is followed by a certificate.
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* // - Bit 1:
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* // 0/1 depending on state of
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* // MBEDTLS_SSL_SESSION_TICKETS
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* // This determines whether the certificate
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* // is followed by a session ticket.
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* // - Bits 2-7: Unused so far
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* opaque mbedtls_version[3]; // major, minor, patch
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* opaque session_format[2]; // version-specific 16-bit field determining
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* // the format of the remaining
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* // serialized data.
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* // In this version, this indicates whether
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* // MBEDTLS_SSL_SERIALIZED_STRUCTURES_LOCAL_ONLY
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* // is set, plus the setting of those compile-
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* // time configuration options which influence
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* // the structure of mbedtls_ssl_session.
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* uint64 start_time;
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* uint8 ciphersuite[2]; // defined by the standard
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* uint8 compression; // 0 or 1
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* uint8 session_id_len; // at most 32
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* uint8 ciphersuite[2]; // defined by the standard
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* uint8 compression; // 0 or 1
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* uint8 session_id_len; // at most 32
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* opaque session_id[32];
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* opaque master[48]; // fixed length in the standard
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* opaque master[48]; // fixed length in the standard
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* uint32 verify_result;
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* opaque peer_cert<0..2^24-1>; // length 0 means no peer cert
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* opaque ticket<0..2^24-1>; // length 0 means no ticket
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* opaque peer_cert<0..2^24-1>; // length 0 means no peer cert
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* opaque ticket<0..2^24-1>; // length 0 means no ticket
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* uint32 ticket_lifetime;
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* uint8 mfl_code; // up to 255 according to standard
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* uint8 trunc_hmac; // 0 or 1
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* uint8 encrypt_then_mac; // 0 or 1
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* uint8 mfl_code; // up to 255 according to standard
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* uint8 trunc_hmac; // 0 or 1
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* uint8 encrypt_then_mac; // 0 or 1
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*
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* The order is the same as in the definition of the structure, except
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* verify_result is put before peer_cert so that all mandatory fields come
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