netxduo
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Outline
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#define NX_SECURE_SOURCE_CODE
#include "nx_secure_tls.h"
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_nx_secure_tls_process_handshake_header(UCHAR *, USHORT *, UINT *, UINT *)
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SourceVuSTM32 Libraries and Samplesnetxduonx_secure/src/nx_secure_tls_process_handshake_header.c
 
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/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */... /**************************************************************************/ ... /**************************************************************************/ /**************************************************************************/ /** */ /** NetX Secure Component */ /** */ /** Transport Layer Security (TLS) */ /** */... /**************************************************************************/ /**************************************************************************/ #define NX_SECURE_SOURCE_CODE #include "nx_secure_tls.h" ... /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _nx_secure_tls_process_handshake_header PORTABLE C */ /* 6.1.3 */ /* AUTHOR */ /* */ /* Timothy Stapko, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function processes a TLS Handshake record header, which is */ /* at the beginning of each TLS Handshake message, encapsulated within */ /* the TLS record itself. */ /* */ /* INPUT */ /* */ /* packet_buffer Pointer to incoming packet */ /* message_type Return message type value */ /* header_size Input size of packet buffer */ /* Return size of header */ /* message_length Return length of message */ /* */ /* OUTPUT */ /* */ /* status Completion status */ /* */ /* CALLS */ /* */ /* None */ /* */ /* CALLED BY */ /* */ /* _nx_secure_tls_client_handshake TLS client state machine */ /* _nx_secure_tls_server_handshake TLS server state machine */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Timothy Stapko Initial Version 6.0 */ /* 09-30-2020 Timothy Stapko Modified comment(s), */ /* resulting in version 6.1 */ /* 12-31-2020 Timothy Stapko Modified comment(s), */ /* improved buffer length */ /* verification, */ /* resulting in version 6.1.3 */ /* */... /**************************************************************************/ UINT _nx_secure_tls_process_handshake_header(UCHAR *packet_buffer, USHORT *message_type, UINT *header_size, UINT *message_length) { /* Check buffer length. */ if (*header_size < 4) { return(NX_SECURE_TLS_INCORRECT_MESSAGE_LENGTH); }if (*header_size < 4) { ... } /* The message being passed in to this function should already be stripped of the TLS header so the first byte in the packet/record is our handshake message type. *//* ... */ *message_type = packet_buffer[0]; packet_buffer++; /* Get the length of the TLS data. */ *message_length = (UINT)((packet_buffer[0] << 16) + (packet_buffer[1] << 8) + packet_buffer[2]); packet_buffer += 3; /* We have extracted 4 bytes of the header. */ *header_size = 4; return(NX_SECURE_TLS_SUCCESS); }{ ... }
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