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Fix de/compression buffer overflows in TAK packets (#4317)
* Fix de/compression buffer overflows in TAK packets * Log message
This commit is contained in:
Ben Meadors
GitHub
parent
6e648b9b77
commit
0d2a9b6282
@ -1,2 +1,2 @@
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.github/workflows/main_matrix.yml
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src/mesh/compression/unishox2.c
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src/mesh/compression/unishox2.cpp
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@ -15,6 +15,7 @@
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*
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* @author Arundale Ramanathan
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*
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* Port for Particle (particle.io) / Aruino - Jonathan Greenblatt
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*/
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/**
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* @file unishox2.c
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@ -36,6 +37,14 @@
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/// uint8_t is unsigned char
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typedef unsigned char uint8_t;
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const char *USX_FREQ_SEQ_DFLT[] = {"\": \"", "\": ", "</", "=\"", "\":\"", "://"};
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const char *USX_FREQ_SEQ_TXT[] = {" the ", " and ", "tion", " with", "ing", "ment"};
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const char *USX_FREQ_SEQ_URL[] = {"https://", "www.", ".com", "http://", ".org", ".net"};
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const char *USX_FREQ_SEQ_JSON[] = {"\": \"", "\": ", "\",", "}}}", "\":\"", "}}"};
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const char *USX_FREQ_SEQ_HTML[] = {"</", "=\"", "div", "href", "class", "<p>"};
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const char *USX_FREQ_SEQ_XML[] = {"</", "=\"", "\">", "<?xml version=\"1.0\"", "xmlns:", "://"};
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const char *USX_TEMPLATES[] = {"tfff-of-tfTtf:rf:rf.fffZ", "tfff-of-tf", "(fff) fff-ffff", "tf:rf:rf", 0};
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/// possible horizontal sets and states
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enum { USX_ALPHA = 0, USX_SYM, USX_NUM, USX_DICT, USX_DELTA, USX_NUM_TEMP };
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@ -57,7 +66,7 @@ uint8_t usx_code_94[94];
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uint8_t usx_vcodes[] = {0x00, 0x40, 0x60, 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xD8, 0xE0, 0xE4, 0xE8, 0xEC,
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0xEE, 0xF0, 0xF2, 0xF4, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF};
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/// Length of each vertical code
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/// Length of each veritical code
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uint8_t usx_vcode_lens[] = {2, 3, 3, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8};
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/// Vertical Codes and Set number for frequent sequences in sets USX_SYM and USX_NUM. First 3 bits indicate set (USX_SYM/USX_NUM)
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@ -188,7 +197,7 @@ int append_switch_code(char *out, int olen, int ol, uint8_t state)
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return ol;
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}
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/// Appends given horizontal and vertical code bits to out
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/// Appends given horizontal and veritical code bits to out
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int append_code(char *out, int olen, int ol, uint8_t code, uint8_t *state, const uint8_t usx_hcodes[],
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const uint8_t usx_hcode_lens[])
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{
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@ -888,7 +897,7 @@ int read8bitCode(const char *in, int len, int bit_no)
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return code;
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}
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/// The list of vertical codes is split into 5 sections. Used by readVCodeIdx()
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/// The list of veritical codes is split into 5 sections. Used by readVCodeIdx()
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#define SECTION_COUNT 5
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/// Used by readVCodeIdx() for finding the section under which the code read using read8bitCode() falls
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uint8_t usx_vsections[] = {0x7F, 0xBF, 0xDF, 0xEF, 0xFF};
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@ -915,7 +924,7 @@ uint8_t usx_vcode_lookup[36] = {(1 << 5) + 0, (1 << 5) + 0, (2 << 5) + 1, (2
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/// compared to using a 256 uint8_t buffer to decode the next 8 bits read by read8bitCode() \n
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/// by splitting the list of vertical codes. \n
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/// Decoder is designed for using less memory, not speed. \n
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/// Returns the vertical code index or 99 if match could not be found. \n
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/// Returns the veritical code index or 99 if match could not be found. \n
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/// Also updates bit_no_p with how many ever bits used by the vertical code.
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int readVCodeIdx(const char *in, int len, int *bit_no_p)
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{
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@ -1420,4 +1429,4 @@ int unishox2_decompress(const char *in, int len, UNISHOX_API_OUT_AND_LEN(char *o
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int unishox2_decompress_simple(const char *in, int len, char *out)
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{
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return unishox2_decompress(in, len, UNISHOX_API_OUT_AND_LEN(out, INT_MAX - 1), USX_PSET_DFLT);
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}
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}
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@ -15,12 +15,7 @@
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*
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* @author Arundale Ramanathan
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*
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*/
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/**
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* @file unishox2.h
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* @author Arundale Ramanathan, James Z. M. Gao
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* @brief API for Unishox2 Compression and Decompression
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* Port for Particle (particle.io) / Aruino - Jonathan Greenblatt
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*
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* This file describes each function of the Unishox2 API \n
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* For finding out how this API can be used in your program, \n
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@ -45,7 +40,7 @@
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* The simple api, i.e. unishox2_(de)compress_simple will always omit the buffer length
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*/
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#ifndef UNISHOX_API_WITH_OUTPUT_LEN
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#define UNISHOX_API_WITH_OUTPUT_LEN 0
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#define UNISHOX_API_WITH_OUTPUT_LEN 1
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#endif
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/// Upto 8 bits of initial magic bit sequence can be included. Bit count can be specified with UNISHOX_MAGIC_BIT_LEN
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@ -156,8 +151,8 @@
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3, 1, 3, 3, 3 \
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}
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//#define USX_HCODES_FAVOR_UMLAUT {0x00, 0x40, 0xE0, 0xC0, 0x80}
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//#define USX_HCODE_LENS_FAVOR_UMLAUT {2, 2, 3, 3, 2}
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// #define USX_HCODES_FAVOR_UMLAUT {0x00, 0x40, 0xE0, 0xC0, 0x80}
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// #define USX_HCODE_LENS_FAVOR_UMLAUT {2, 2, 3, 3, 2}
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/// Horizontal codes preset favouring umlaut letters
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#define USX_HCODES_FAVOR_UMLAUT \
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@ -198,50 +193,13 @@
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2, 2, 2, 2, 0 \
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}
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/// Default frequently occurring sequences. When composition of text is know beforehand, the other sequences in this section can
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/// be used to achieve more compression.
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#define USX_FREQ_SEQ_DFLT \
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(const char *[]) \
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{ \
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"\": \"", "\": ", "</", "=\"", "\":\"", "://" \
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}
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/// Frequently occurring sequences in text content
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#define USX_FREQ_SEQ_TXT \
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(const char *[]) \
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{ \
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" the ", " and ", "tion", " with", "ing", "ment" \
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}
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/// Frequently occurring sequences in URL content
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#define USX_FREQ_SEQ_URL \
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(const char *[]) \
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{ \
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"https://", "www.", ".com", "http://", ".org", ".net" \
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}
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/// Frequently occurring sequences in JSON content
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#define USX_FREQ_SEQ_JSON \
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(const char *[]) \
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{ \
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"\": \"", "\": ", "\",", "}}}", "\":\"", "}}" \
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}
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/// Frequently occurring sequences in HTML content
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#define USX_FREQ_SEQ_HTML \
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(const char *[]) \
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{ \
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"</", "=\"", "div", "href", "class", "<p>" \
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}
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/// Frequently occurring sequences in XML content
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#define USX_FREQ_SEQ_XML \
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(const char *[]) \
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{ \
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"</", "=\"", "\">", "<?xml version=\"1.0\"", "xmlns:", "://" \
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}
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/// Commonly occurring templates (ISO Date/Time, ISO Date, US Phone number, ISO Time, Unused)
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#define USX_TEMPLATES \
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(const char *[]) \
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{ \
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"tfff-of-tfTtf:rf:rf.fffZ", "tfff-of-tf", "(fff) fff-ffff", "tf:rf:rf", 0 \
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}
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extern const char *USX_FREQ_SEQ_DFLT[];
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extern const char *USX_FREQ_SEQ_TXT[];
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extern const char *USX_FREQ_SEQ_URL[];
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extern const char *USX_FREQ_SEQ_JSON[];
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extern const char *USX_FREQ_SEQ_HTML[];
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extern const char *USX_FREQ_SEQ_XML[];
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extern const char *USX_TEMPLATES[];
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/// Default preset parameter set. When composition of text is know beforehand, the other parameter sets in this section can be
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/// used to achieve more compression.
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@ -333,8 +291,8 @@ extern int unishox2_decompress_simple(const char *in, int len, char *out);
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* @param[in] olen length of 'out' buffer in bytes. Can be omitted if sufficient buffer is provided
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* @param[in] usx_hcodes Horizontal codes (array of bytes). See macro section for samples.
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* @param[in] usx_hcode_lens Length of each element in usx_hcodes array
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* @param[in] usx_freq_seq Frequently occurring sequences. See USX_FREQ_SEQ_* macros for samples
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* @param[in] usx_templates Templates of frequently occurring patterns. See USX_TEMPLATES macro.
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* @param[in] usx_freq_seq Frequently occuring sequences. See USX_FREQ_SEQ_* macros for samples
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* @param[in] usx_templates Templates of frequently occuring patterns. See USX_TEMPLATES macro.
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*/
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extern int unishox2_compress(const char *in, int len, UNISHOX_API_OUT_AND_LEN(char *out, int olen),
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const unsigned char usx_hcodes[], const unsigned char usx_hcode_lens[], const char *usx_freq_seq[],
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@ -352,8 +310,8 @@ extern int unishox2_compress(const char *in, int len, UNISHOX_API_OUT_AND_LEN(ch
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* @param[in] olen length of 'out' buffer in bytes. Can be omitted if sufficient buffer is provided
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* @param[in] usx_hcodes Horizontal codes (array of bytes). See macro section for samples.
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* @param[in] usx_hcode_lens Length of each element in usx_hcodes array
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* @param[in] usx_freq_seq Frequently occurring sequences. See USX_FREQ_SEQ_* macros for samples
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* @param[in] usx_templates Templates of frequently occurring patterns. See USX_TEMPLATES macro.
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* @param[in] usx_freq_seq Frequently occuring sequences. See USX_FREQ_SEQ_* macros for samples
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* @param[in] usx_templates Templates of frequently occuring patterns. See USX_TEMPLATES macro.
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*/
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extern int unishox2_decompress(const char *in, int len, UNISHOX_API_OUT_AND_LEN(char *out, int olen),
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const unsigned char usx_hcodes[], const unsigned char usx_hcode_lens[], const char *usx_freq_seq[],
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@ -373,7 +331,7 @@ extern int unishox2_compress_lines(const char *in, int len, UNISHOX_API_OUT_AND_
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const char *usx_freq_seq[], const char *usx_templates[], struct us_lnk_lst *prev_lines);
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/**
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* More Comprehensive API for de-compressing array of strings \n
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* This function is not be used in conjunction with unishox2_compress_lines()
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* This function is not be used in conjuction with unishox2_compress_lines()
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*
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* See unishox2_decompress() function for parameter definitions. \n
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* Typically an array is compressed using unishox2_compress_lines() and \n
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@ -386,4 +344,4 @@ extern int unishox2_decompress_lines(const char *in, int len, UNISHOX_API_OUT_AN
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const unsigned char usx_hcodes[], const unsigned char usx_hcode_lens[],
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const char *usx_freq_seq[], const char *usx_templates[], struct us_lnk_lst *prev_lines);
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#endif
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#endif
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@ -5,11 +5,8 @@
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#include "PowerFSM.h"
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#include "configuration.h"
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#include "main.h"
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#include "meshtastic/atak.pb.h"
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extern "C" {
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#include "mesh/compression/unishox2.h"
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}
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#include "meshtastic/atak.pb.h"
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AtakPluginModule *atakPluginModule;
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@ -69,30 +66,53 @@ void AtakPluginModule::alterReceivedProtobuf(meshtastic_MeshPacket &mp, meshtast
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auto compressed = cloneTAKPacketData(t);
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compressed.is_compressed = true;
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if (t->has_contact) {
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auto length = unishox2_compress_simple(t->contact.callsign, strlen(t->contact.callsign), compressed.contact.callsign);
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auto length = unishox2_compress_lines(t->contact.callsign, strlen(t->contact.callsign), compressed.contact.callsign,
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sizeof(compressed.contact.callsign) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Compression overflowed contact.callsign. Reverting to uncompressed packet\n");
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return;
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}
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LOG_DEBUG("Compressed callsign: %d bytes\n", length);
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length = unishox2_compress_simple(t->contact.device_callsign, strlen(t->contact.device_callsign),
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compressed.contact.device_callsign);
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length = unishox2_compress_lines(t->contact.device_callsign, strlen(t->contact.device_callsign),
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compressed.contact.device_callsign, sizeof(compressed.contact.device_callsign) - 1,
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USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Compression overflowed contact.device_callsign. Reverting to uncompressed packet\n");
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return;
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}
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LOG_DEBUG("Compressed device_callsign: %d bytes\n", length);
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}
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if (t->which_payload_variant == meshtastic_TAKPacket_chat_tag) {
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auto length = unishox2_compress_simple(t->payload_variant.chat.message, strlen(t->payload_variant.chat.message),
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compressed.payload_variant.chat.message);
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auto length = unishox2_compress_lines(t->payload_variant.chat.message, strlen(t->payload_variant.chat.message),
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compressed.payload_variant.chat.message,
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sizeof(compressed.payload_variant.chat.message) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Compression overflowed chat.message. Reverting to uncompressed packet\n");
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return;
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}
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LOG_DEBUG("Compressed chat message: %d bytes\n", length);
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if (t->payload_variant.chat.has_to) {
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compressed.payload_variant.chat.has_to = true;
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length = unishox2_compress_simple(t->payload_variant.chat.to, strlen(t->payload_variant.chat.to),
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compressed.payload_variant.chat.to);
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length = unishox2_compress_lines(t->payload_variant.chat.to, strlen(t->payload_variant.chat.to),
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compressed.payload_variant.chat.to,
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sizeof(compressed.payload_variant.chat.to) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Compression overflowed chat.to. Reverting to uncompressed packet\n");
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return;
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}
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LOG_DEBUG("Compressed chat to: %d bytes\n", length);
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}
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if (t->payload_variant.chat.has_to_callsign) {
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compressed.payload_variant.chat.has_to_callsign = true;
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length =
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unishox2_compress_simple(t->payload_variant.chat.to_callsign, strlen(t->payload_variant.chat.to_callsign),
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compressed.payload_variant.chat.to_callsign);
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length = unishox2_compress_lines(t->payload_variant.chat.to_callsign, strlen(t->payload_variant.chat.to_callsign),
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compressed.payload_variant.chat.to_callsign,
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sizeof(compressed.payload_variant.chat.to_callsign) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Compression overflowed chat.to_callsign. Reverting to uncompressed packet\n");
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return;
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}
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LOG_DEBUG("Compressed chat to_callsign: %d bytes\n", length);
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}
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}
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@ -102,7 +122,7 @@ void AtakPluginModule::alterReceivedProtobuf(meshtastic_MeshPacket &mp, meshtast
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} else {
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if (!t->is_compressed) {
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// Not compressed. Something is wrong
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LOG_ERROR("Received uncompressed TAKPacket over radio!\n");
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LOG_WARN("Received uncompressed TAKPacket over radio! Skipping\n");
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return;
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}
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@ -112,32 +132,55 @@ void AtakPluginModule::alterReceivedProtobuf(meshtastic_MeshPacket &mp, meshtast
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uncompressed.is_compressed = false;
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if (t->has_contact) {
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auto length =
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unishox2_decompress_simple(t->contact.callsign, strlen(t->contact.callsign), uncompressed.contact.callsign);
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unishox2_decompress_lines(t->contact.callsign, strlen(t->contact.callsign), uncompressed.contact.callsign,
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sizeof(uncompressed.contact.callsign) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Decompression overflowed contact.callsign. Bailing out\n");
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return;
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}
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LOG_DEBUG("Decompressed callsign: %d bytes\n", length);
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length = unishox2_decompress_simple(t->contact.device_callsign, strlen(t->contact.device_callsign),
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uncompressed.contact.device_callsign);
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length = unishox2_decompress_lines(t->contact.device_callsign, strlen(t->contact.device_callsign),
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uncompressed.contact.device_callsign,
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sizeof(uncompressed.contact.device_callsign) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Decompression overflowed contact.device_callsign. Bailing out\n");
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return;
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}
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LOG_DEBUG("Decompressed device_callsign: %d bytes\n", length);
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}
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if (uncompressed.which_payload_variant == meshtastic_TAKPacket_chat_tag) {
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auto length = unishox2_decompress_simple(t->payload_variant.chat.message, strlen(t->payload_variant.chat.message),
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uncompressed.payload_variant.chat.message);
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auto length = unishox2_decompress_lines(t->payload_variant.chat.message, strlen(t->payload_variant.chat.message),
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uncompressed.payload_variant.chat.message,
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sizeof(uncompressed.payload_variant.chat.message) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Decompression overflowed chat.message. Bailing out\n");
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return;
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}
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LOG_DEBUG("Decompressed chat message: %d bytes\n", length);
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if (t->payload_variant.chat.has_to) {
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uncompressed.payload_variant.chat.has_to = true;
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length = unishox2_decompress_simple(t->payload_variant.chat.to, strlen(t->payload_variant.chat.to),
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uncompressed.payload_variant.chat.to);
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length = unishox2_decompress_lines(t->payload_variant.chat.to, strlen(t->payload_variant.chat.to),
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uncompressed.payload_variant.chat.to,
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sizeof(uncompressed.payload_variant.chat.to) - 1, USX_PSET_DFLT, NULL);
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if (length < 0) {
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LOG_WARN("Decompression overflowed chat.to. Bailing out\n");
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return;
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}
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LOG_DEBUG("Decompressed chat to: %d bytes\n", length);
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}
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if (t->payload_variant.chat.has_to_callsign) {
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uncompressed.payload_variant.chat.has_to_callsign = true;
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length =
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unishox2_decompress_simple(t->payload_variant.chat.to_callsign, strlen(t->payload_variant.chat.to_callsign),
|
||||
uncompressed.payload_variant.chat.to_callsign);
|
||||
unishox2_decompress_lines(t->payload_variant.chat.to_callsign, strlen(t->payload_variant.chat.to_callsign),
|
||||
uncompressed.payload_variant.chat.to_callsign,
|
||||
sizeof(uncompressed.payload_variant.chat.to_callsign) - 1, USX_PSET_DFLT, NULL);
|
||||
if (length < 0) {
|
||||
LOG_WARN("Decompression overflowed chat.to_callsign. Bailing out\n");
|
||||
return;
|
||||
}
|
||||
LOG_DEBUG("Decompressed chat to_callsign: %d bytes\n", length);
|
||||
}
|
||||
}
|
||||
@ -148,4 +191,4 @@ void AtakPluginModule::alterReceivedProtobuf(meshtastic_MeshPacket &mp, meshtast
|
||||
service.sendToPhone(decompressedCopy);
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
@ -11,12 +11,12 @@
|
||||
#include "configuration.h"
|
||||
#include "gps/GeoCoord.h"
|
||||
#include "main.h"
|
||||
#include "mesh/compression/unishox2.h"
|
||||
#include "meshtastic/atak.pb.h"
|
||||
#include "sleep.h"
|
||||
#include "target_specific.h"
|
||||
|
||||
extern "C" {
|
||||
#include "mesh/compression/unishox2.h"
|
||||
#include <Throttle.h>
|
||||
}
|
||||
|
||||
@ -255,10 +255,12 @@ meshtastic_MeshPacket *PositionModule::allocAtakPli()
|
||||
.course = static_cast<uint16_t>(localPosition.ground_track),
|
||||
}}};
|
||||
|
||||
auto length = unishox2_compress_simple(owner.long_name, strlen(owner.long_name), takPacket.contact.device_callsign);
|
||||
auto length = unishox2_compress_lines(owner.long_name, strlen(owner.long_name), takPacket.contact.device_callsign,
|
||||
sizeof(takPacket.contact.device_callsign) - 1, USX_PSET_DFLT, NULL);
|
||||
LOG_DEBUG("Uncompressed device_callsign '%s' - %d bytes\n", owner.long_name, strlen(owner.long_name));
|
||||
LOG_DEBUG("Compressed device_callsign '%s' - %d bytes\n", takPacket.contact.device_callsign, length);
|
||||
length = unishox2_compress_simple(owner.long_name, strlen(owner.long_name), takPacket.contact.callsign);
|
||||
length = unishox2_compress_lines(owner.long_name, strlen(owner.long_name), takPacket.contact.callsign,
|
||||
sizeof(takPacket.contact.callsign) - 1, USX_PSET_DFLT, NULL);
|
||||
mp->decoded.payload.size =
|
||||
pb_encode_to_bytes(mp->decoded.payload.bytes, sizeof(mp->decoded.payload.bytes), &meshtastic_TAKPacket_msg, &takPacket);
|
||||
return mp;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user