software AES encryption for NRF24
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ENC + encrytion + soft-signing fails :(
Sketch uses 34,244 bytes (106%) of program storage space. Maximum is 32,256 bytes.
Global variables use 1,912 bytes (93%) of dynamic memory, leaving 136 bytes for local variables. Maximum is 2,048 bytes. -
Well, it is the worst possible case. Perhaps hw signing fits.
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actually, I prefer usb but it could fit easily in mysensors wifi gateway..
nice work! -
Wow, thank you all for your overwhelming feedback!
@Anticimex: in your first reply you asked about routing. This is not a problem, as all nodes share the same encryption key and the whole packet is decrypted by any relay node, handled and re-encrypted. As the relay node changes the first byte of data, some extra entropy is added as well.
I decided to encrypt the whole packets because AES has 16byte block size which works good with the 32byte size limit of the NRF-packets. Just encrypting the payload on the other hand would limit the payload-size to 16bytes.I also took a look at the ATAES132-chip. The chip offers AES-CCM for encryption and authentification. Using the DECRYPT command on the chip we would need to provide a valid 16-byte MAC-key (which is calculated using the encrypted data and other authenticate-only data bytes). If we don't want to change the protocol to add encrypted MAC-exchange for each packet this is not an option.
The chip also offers a LEGACY-command which is supposed to be used for encryption and decryption. Normally encryption and decryption are different operations, so I still need to find out what the LEGACY-command does. -
Wow, thank you all for your overwhelming feedback!
@Anticimex: in your first reply you asked about routing. This is not a problem, as all nodes share the same encryption key and the whole packet is decrypted by any relay node, handled and re-encrypted. As the relay node changes the first byte of data, some extra entropy is added as well.
I decided to encrypt the whole packets because AES has 16byte block size which works good with the 32byte size limit of the NRF-packets. Just encrypting the payload on the other hand would limit the payload-size to 16bytes.I also took a look at the ATAES132-chip. The chip offers AES-CCM for encryption and authentification. Using the DECRYPT command on the chip we would need to provide a valid 16-byte MAC-key (which is calculated using the encrypted data and other authenticate-only data bytes). If we don't want to change the protocol to add encrypted MAC-exchange for each packet this is not an option.
The chip also offers a LEGACY-command which is supposed to be used for encryption and decryption. Normally encryption and decryption are different operations, so I still need to find out what the LEGACY-command does.@fleinze yes, exactly. My point was that (like you said) ALL nodes in the network have to support encryption/decryption if it is to work beyond strict ad-hoc communication.
Regarding the Atmel chip, yes that is something to think about. I don't have the bandwidth to fix that myself within reasonable time right now but as long as the keys are properly protected, I do think legacy support is adequate. But like you I have not looked into that further. The way I see it, the signing system takes care of that part, and encryption can be added to add obfuscation to the process.
Also, to me it is important that SW and HW alternatives are interchangeable and that mean the encryption MAC stuff has to be ported in SW as well and the things start spiralling out of hand. And ideally, it should be compatible with the rf69 encryption scheme as well which I believe is the same as "Atmel legacy" and your SW approach here. -
Interesting thing that atmel chip. It seems that it's a direct replacement for the onboard flash chip used on the sensebender, pin wise that is. As it's an eeprom, commands might be different than the ones we use for the flash now.
@tbowmo Yes, I also noticed that. Made me space out thinking about the possibilities to replace the SPI flash we currently use for one of the bootloaders OTA solution. And legacy encryption might be so cheap it will fit the bootloader as well as I believe all IO commands to the chip uses the same basic read/write operations so adding a decryption call of a message would not cost may bytes if the IO functions are there anyway.
It would also mean it is a drop-in replacement for the memory in your upcoming gw as well as my upcoming sensorboard :) And although I don't have the time to indulge myself too much in implementation for the moment, just knowing that it won't require a new PCB is encouraging. And it might also perhaps encourage someone with the time to spare who happened to have a sensebender to do a little rework and test it out :) And if nothing else, I might do it myself eventually. But don't expect it for 2015, and perhaps not even 2016 :( I am then leaving the country and will set up shop in your hood :) and after the dust settles I can start MySensoring more seriously hopefully. -
Compiling AES with an ESP8266 fails. I had to change AES_config.h (in drivers/AES):
#include <pgmspace.h>
instead of
#include <avr/pgmspace.h>
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Compiling AES with an ESP8266 fails. I had to change AES_config.h (in drivers/AES):
#include <pgmspace.h>
instead of
#include <avr/pgmspace.h>
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ENC + encrytion + soft-signing fails :(
Sketch uses 34,244 bytes (106%) of program storage space. Maximum is 32,256 bytes.
Global variables use 1,912 bytes (93%) of dynamic memory, leaving 136 bytes for local variables. Maximum is 2,048 bytes.@hek said:
ENC + encrytion + soft-signing fails :(
Sketch uses 34,244 bytes (106%) of program storage space. Maximum is 32,256 bytes.
Global variables use 1,912 bytes (93%) of dynamic memory, leaving 136 bytes for local variables. Maximum is 2,048 bytes.Yesterday I made a setup with a ESP8266 gateway and a mega2560 as a secure relay actuator with encryption and signing. There are quite small mega2560 but a sensbender mega2560 would be desireable. :)
ENC + encryption + soft signing is working! :relaxed:
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@hek said:
ENC + encrytion + soft-signing fails :(
Sketch uses 34,244 bytes (106%) of program storage space. Maximum is 32,256 bytes.
Global variables use 1,912 bytes (93%) of dynamic memory, leaving 136 bytes for local variables. Maximum is 2,048 bytes.Yesterday I made a setup with a ESP8266 gateway and a mega2560 as a secure relay actuator with encryption and signing. There are quite small mega2560 but a sensbender mega2560 would be desireable. :)
ENC + encryption + soft signing is working! :relaxed:
@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
Do you feel secure today? No? Start requiring some signatures and feel better tomorrow ;)
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@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
@Anticimex said:
@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
Yes, but encryption and ATSHA204A is to big for the SenseBender... :(
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@Anticimex said:
@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
Yes, but encryption and ATSHA204A is to big for the SenseBender... :(
@FotoFieber ah. Bummer :(
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@Anticimex said:
@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
Yes, but encryption and ATSHA204A is to big for the SenseBender... :(
@FotoFieber said:
@Anticimex said:
@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
Yes, but encryption and ATSHA204A is to big for the SenseBender... :(
Old thread, but... In the dev branch, there's a RF24 refactor that is much smaller. With that, and removing test-mode, there's plenty of space on the sensebender:
#define MY_RADIO_NRF24
#define MY_SIGNING_ATSHA204
#define MY_SIGNING_REQUEST_SIGNATURES
#define MY_SIGNING_NODE_WHITELISTING {{.nodeId = GATEWAY_ADDRESS,.serial = {0xBO,0xGU,0xSK,0xEY,0xZZ,0xFC,0xAD,0x04,0xD1}}}
#define MY_OTA_FIRMWARE_FEATURE
#define MY_RF24_ENABLE_ENCRYPTIONSketch uses 23,196 bytes (75%) of program storage space. Maximum is 30,720 bytes.
Global variables use 1,386 bytes (67%) of dynamic memory, leaving 662 bytes for local variables. Maximum is 2,048 bytes.Even with debug it's only at 91%.
My W5100 gateway ends up at 107% with AES though, but it fits (with 592 bytes to spare) if I use a static address instead of DHCP.
Serial Gateway ends up at only 65%. -
@FotoFieber said:
@Anticimex said:
@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup :)
Yes, but encryption and ATSHA204A is to big for the SenseBender... :(
Old thread, but... In the dev branch, there's a RF24 refactor that is much smaller. With that, and removing test-mode, there's plenty of space on the sensebender:
#define MY_RADIO_NRF24
#define MY_SIGNING_ATSHA204
#define MY_SIGNING_REQUEST_SIGNATURES
#define MY_SIGNING_NODE_WHITELISTING {{.nodeId = GATEWAY_ADDRESS,.serial = {0xBO,0xGU,0xSK,0xEY,0xZZ,0xFC,0xAD,0x04,0xD1}}}
#define MY_OTA_FIRMWARE_FEATURE
#define MY_RF24_ENABLE_ENCRYPTIONSketch uses 23,196 bytes (75%) of program storage space. Maximum is 30,720 bytes.
Global variables use 1,386 bytes (67%) of dynamic memory, leaving 662 bytes for local variables. Maximum is 2,048 bytes.Even with debug it's only at 91%.
My W5100 gateway ends up at 107% with AES though, but it fits (with 592 bytes to spare) if I use a static address instead of DHCP.
Serial Gateway ends up at only 65%.@ximinez RF24 refactor - do you mean RF24 inside the MySensors folder? I tried it but still out of luck:
Sketch uses 31,396 bytes (102%) of program storage space. Maximum is 30,720 bytes. Global variables use 1,762 bytes (86%) of dynamic memory, leaving 286 bytes for local variables. -
@ximinez RF24 refactor - do you mean RF24 inside the MySensors folder? I tried it but still out of luck:
Sketch uses 31,396 bytes (102%) of program storage space. Maximum is 30,720 bytes. Global variables use 1,762 bytes (86%) of dynamic memory, leaving 286 bytes for local variables.@alexsh1 from development branch, not master. 2.0.0-beta. Rf24 driver on that branch has been significantly optimized (together with other parts of the library).
Do you feel secure today? No? Start requiring some signatures and feel better tomorrow ;)
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@alexsh1 from development branch, not master. 2.0.0-beta. Rf24 driver on that branch has been significantly optimized (together with other parts of the library).
@Anticimex Thanks for heads up - I think I messed up different versions though I remember unpacking "Arduino-development". I deleted the whole folder and unzipped the files again and voila:
Sketch uses 28,228 bytes (91%) of program storage space. Maximum is 30,720 bytes. Global variables use 1,462 bytes (71%) of dynamic memory, leaving 586 bytes for local variables. Maximum is 2,048 bytes.UPDATE: It turned out DEBUG took a lot of memory (DEBUG AND SIGNING DEBUG)
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@Anticimex Thanks for heads up - I think I messed up different versions though I remember unpacking "Arduino-development". I deleted the whole folder and unzipped the files again and voila:
Sketch uses 28,228 bytes (91%) of program storage space. Maximum is 30,720 bytes. Global variables use 1,462 bytes (71%) of dynamic memory, leaving 586 bytes for local variables. Maximum is 2,048 bytes.UPDATE: It turned out DEBUG took a lot of memory (DEBUG AND SIGNING DEBUG)
Just tried
#define MY_RADIO_NRF24 #define MY_SIGNING_SOFT #define MY_SIGNING_REQUEST_SIGNATURES #define MY_RF24_ENABLE_ENCRYPTIONThis was working in the old dev branch but doesn't work for me anymore. Did you have luck with the combination of signing and encryption?
n�Ox>�XܚMZ������t��ֵ���<�� �=�a�WY=��VP�� ��E� P�pStarting repeater (RNNRAS, 2.0.0) TSM:INIT TSM:RADIO:OK TSP:ASSIGNID:OK (ID=15) TSM:FPAR TSP:MSG:SEND 15-15-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc: TSP:MSG:READ 0-0-15 s=255,c=3,t=8,pt=1,l=1,sg=0:0 Skipping security for command 3 type 8 TSP:MSG:FPAR RES (ID=0, dist=0) TSP:MSG:PAR OK (ID=0, dist=1) TSM:FPAR:OK TSM:ID TSM:CHKID:OK (ID=15) TSM:UPL TSP:PING:SEND (dest=0) Skipping security for command 3 type 24 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=fail:1 TSP:MSG:READ 0-0-15 s=255,c=3,t=25,pt=1,l=1,sg=0:1 Skipping security for command 3 type 25 TSP:MSG:PONG RECV (hops=1) TSP:CHKUPL:OK TSM:UPL:OK TSM:READY Signing required Skipping security for command 3 type 15 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=15,pt=6,l=2,sg=0,ft=1,st=fail:0101 Failed to transmit signing presentation!Waiting for GW to send signing preferences... TSP:MSG:READ 0-0-15 s=255,c=3,t=15,pt=6,l=2,sg=0:0101 Skipping security for command 3 type 15 Mark node 0 as one that require signed messages Mark node 0 as one that do not require whitelisting Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=16,pt=0,l=0,sg=0,ft=2,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=16,pt=0,l=0,sg=0,ft=4,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=0:972DE10483D0864680CE821987E5823ABAEF8435F971670F04 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F00060310FF Current nonce: 972DE10483D0864680CE821987E5823ABAEF8435F971670F04AAAAAAAAAAAAAA HMAC: 7922F4E571510EC46BD3CAAF37A1C1627BAE2562BA0ADC210173076854649826 Signature in message: 0122F4E571510EC46BD3CAAF37A1C1627BAE2562BA0ADC2101 Message signed TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=0:59321F17D680FFDC461270BD2C22F77FBC6FF6DE90DD9A34E6 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F00060310FF Current nonce: 59321F17D680FFDC461270BD2C22F77FBC6FF6DE90DD9A34E6AAAAAAAAAAAAAA HMAC: 09031876715AD7ADBC81671982D07A46122D564110C59880AB733AACB111289E Signature in message: 01031876715AD7ADBC81671982D07A46122D564110C59880AB Message signed Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=16,pt=0,l=0,sg=1,ft=6,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=16,pt=0,l=0,sg=1,ft=8,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:24AB30408F0D10A7DB4CE357B22C908ED2438638C567DF52AE Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F00060310FF Current nonce: 24AB30408F0D10A7DB4CE357B22C908ED2438638C567DF52AEAAAAAAAAAAAAAA HMAC: C2B0487B88AD8AE2FD7FB63C21E841324ED48975681EB881A7EC556D74637B33 Signature in message: 01B0487B88AD8AE2FD7FB63C21E841324ED48975681EB881A7 Message signed TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:4CDF80D7AAF5358B4DA616FBB1556569F68818F331C6C681F3 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F00060310FF Current nonce: 4CDF80D7AAF5358B4DA616FBB1556569F68818F331C6C681F3AAAAAAAAAAAAAA HMAC: C12B5B8BD5EA6DD142908FBB02A06933E3FFBC399876B8B52E30BA9A1A66B4FC Signature in message: 012B5B8BD5EA6DD142908FBB02A06933E3FFBC399876B8B52E Message signed Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=1,c=3,t=16,pt=0,l=0,sg=1,ft=10,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail !TSM:UPL FAIL, SNP TSM:FPAR TSP:MSG:SEND 15-15-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc: TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:0EEFA88D4FB45539A0B20C586D989BF510FC83F270ABEC3E2A Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031001 Current nonce: 0EEFA88D4FB45539A0B20C586D989BF510FC83F270ABEC3E2AAAAAAAAAAAAAAA HMAC: 2AEEC1974BF5ED7DE100A555DD98E420E5CA0C33918F8BEFF3524B1FED047C52 Signature in message: 01EEC1974BF5ED7DE100A555DD98E420E5CA0C33918F8BEFF3 Message signed TSP:MSG:READ 0-0-15 s=255,c=3,t=8,pt=1,l=1,sg=0:0 Skipping security for command 3 type 8 TSP:MSG:FPAR RES (ID=0, dist=0) TSP:MSG:PAR OK (ID=0, dist=1) !TSP:SEND:TNR !TSP:SEND:TNR !TSP:SEND:TNR !TSP:SEND:TNR TSM:FPAR:OK TSM:ID TSM:CHKID:OK (ID=15) TSM:UPL TSP:PING:SEND (dest=0) Skipping security for command 3 type 24 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=fail:1 TSP:MSG:READ 0-0-15 s=255,c=3,t=25,pt=1,l=1,sg=0:1 Skipping security for command 3 type 25 TSP:MSG:PONG RECV (hops=1) TSP:CHKUPL:OK TSM:UPL:OK TSM:READY Request registration... Skipping security for command 3 type 26 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=26,pt=1,l=1,sg=0,ft=1,st=fail:2 TSP:MSG:READ 0-0-15 s=255,c=3,t=16,pt=0,l=0,sg=0: Skipping security for command 3 type 16 Signing backend: ATSHA204Soft SHA256: 23DD90319EEA644480F44B15B3A95D6B20AD8380A953D40C7600000000000000 Skipping security for command 3 type 17 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=17,pt=6,l=25,sg=0,ft=2,st=fail:23DD90319EEA644480F44B15B3A95D6B20AD8380A953D40C76 Failed to transmit nonce! TSP:MSG:READ 0-0-15 s=255,c=3,t=27,pt=1,l=1,sg=1:1 Signature in message: 011EA3852B9E54EF00F415B0A6121E25B32B9C5F976A090B Message to process: 000F0E231BFF01 Current nonce: 23DD90319EEA644480F44B15B3A95D6B20AD8380A953D40C76AAAAAAAAAAAAAA HMAC: 611EA3852B9E54EF00F415B0A6121E25B32B9C5F976A090BF2C96E0C02F28D72 Signature OK Node registration=1 Init complete, id=15, parent=0, distance=1, registration=1 Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=2,c=3,t=16,pt=0,l=0,sg=1,ft=3,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:AA800D53018F5EAFCD48C21D3F702501539BFE5DF7E008B204 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031002 Current nonce: AA800D53018F5EAFCD48C21D3F702501539BFE5DF7E008B204AAAAAAAAAAAAAA HMAC: 2E1247A4A77CA0767BFD16B9A1FCE401EF39B4D76FA6A96EF0978CE322271A6F Signature in message: 011247A4A77CA0767BFD16B9A1FCE401EF39B4D76FA6A96EF0 Message signed Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=3,c=3,t=16,pt=0,l=0,sg=1,ft=5,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:358C0D190097ABD8AB64BF680AF252EAC6036B73222A854502 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031003 Current nonce: 358C0D190097ABD8AB64BF680AF252EAC6036B73222A854502AAAAAAAAAAAAAA HMAC: 4A209EA1B12FB01659122DD26F2F3FB7EC15439DDEFEA90813AA0E8F87321683 Signature in message: 01209EA1B12FB01659122DD26F2F3FB7EC15439DDEFEA90813 Message signed Ping: 60 cm Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=1,c=3,t=16,pt=0,l=0,sg=1,ft=7,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:0677F380706F11E12CFC0C43FE9559F36D8FDAEB6854836E06 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031001 Current nonce: 0677F380706F11E12CFC0C43FE9559F36D8FDAEB6854836E06AAAAAAAAAAAAAA HMAC: 5E895658E4C08BCE1D6B5FC560D1AA608AB2AEDF9385EA80ABA1EDD8EE003EE5 Signature in message: 01895658E4C08BCE1D6B5FC560D1AA608AB2AEDF9385EA80AB Message signed Send button 1 pressed Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=4,c=3,t=16,pt=0,l=0,sg=1,ft=9,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail !TSM:UPL FAIL, SNP TSM:FPAR TSP:MSG:SEND 15-15-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc: TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:EE3BFA6BFDD922BB892AC9A1BF2079803D8C3C258B18DFA29B Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031004 Current nonce: EE3BFA6BFDD922BB892AC9A1BF2079803D8C3C258B18DFA29BAAAAAAAAAAAAAA HMAC: 7BEF3C478AD984729ED9A2717575A5325E66EF4C0CC9D3D761A1886A4BF4C4FD Signature in message: 01EF3C478AD984729ED9A2717575A5325E66EF4C0CC9D3D761 Message signed TSP:MSG:READ 0-0-15 s=255,c=3,t=8,pt=1,l=1,sg=1:0 Skipping security for command 3 type 8 TSP:MSG:FPAR RES (ID=0, dist=0) TSP:MSG:PAR OK (ID=0, dist=1) !TSP:SEND:TNR TSM:FPAR:OK TSM:ID TSM:CHKID:OK (ID=15) TSM:UPL TSP:PING:SEND (dest=0) Skipping security for command 3 type 24 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=fail:1 TSP:MSG:READ 0-0-15 s=255,c=3,t=25,pt=1,l=1,sg=1:1 Skipping security for command 3 type 25 TSP:MSG:PONG RECV (hops=1) TSP:CHKUPL:OK TSM:UPL:OK TSM:READY Send button 1 pressed Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=4,c=3,t=16,pt=0,l=0,sg=1,ft=1,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:9069C5ABD4E3E13F19A92D0B708ABB41C809B6D67654357C61 Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031004 Current nonce: 9069C5ABD4E3E13F19A92D0B708ABB41C809B6D67654357C61AAAAAAAAAAAAAA HMAC: 01CCD77E9CC961B65E896180243DAB5E9174C0B88032D38261ED78BB619A00EF Signature in message: 01CCD77E9CC961B65E896180243DAB5E9174C0B88032D38261 Message signed Skipping security for command 3 type 16 !TSP:MSG:SEND 15-15-0-0 s=2,c=3,t=16,pt=0,l=0,sg=1,ft=3,st=fail: Failed to transmit nonce request! !TSP:MSG:SIGN fail TSP:MSG:READ 0-0-15 s=255,c=3,t=17,pt=6,l=25,sg=1:1B94EC3D5354C0431C3D49CEC8903433984E2DE5D04F2D00DD Skipping security for command 3 type 17 Nonce received from 0. Proceeding with signing... Signing backend: ATSHA204Soft Message to process: 0F0006031002 Current nonce: 1B94EC3D5354C0431C3D49CEC8903433984E2DE5D04F2D00DDAAAAAAAAAAAAAA HMAC: D46DFC8ACCEE0FA7E6D282E8556F9EC7659804AD3D33163E9522F7769449F809 Signature in message: 016DFC8ACCEE0FA7E6D282E8556F9EC7659804AD3D33163E95 Message signed Ping: 61 cm Ping: 60 cm Ping: 60 cm TSP:MSG:READ 12-12-255 s=255,c=3,t=7,pt=0,l=0,sg=0: TSP:MSG:BC TSP:MSG:FPAR REQ (sender=12) TSP:PING:SEND (dest=0) Skipping security for command 3 type 24 !TSP:MSG:SEND 15-15-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=5,st=fail:1 TSP:MSG:READ 0-0-15 s=255,c=3,t=25,pt=1,l=1,sg=0:1 Skipping security for command 3 type 25 TSP:MSG:PONG RECV (hops=1) TSP:CHKUPL:OK TSP:MSG:GWL OK TSP:MSG:SEND 15-15-12-12 s=255,c=3,t=8,pt=1,l=1,sg=0,ft=6,st=ok:1 Ping: 60 cm -
Not sure if it is a typo or now but you list
#define MY_SIGNING_ASOFTbut it should be#define MY_SIGNING_SOFTIn any case, you get st=fail which mean your radio setup is basically not working.
For any security to work, messages has to get through, and from your log, they don't:
"Failed to transmit signing presentation!"
"Failed to transmit nonce request!"
So I think from the log that signing and encryption is working, but occasionally you get messages dropped due to a poor radio link which manifests itself as failed transmissions. -
If implemented correctly, AES is AES; the output between two different implementations is identical, and therefore no distinction is possible in after-the-fact comparison -- if done correctly, the one is exactly the same as the other.
But there are a few points where differences can crop in:
Operation Mode
Truecrypt implements a modified counter mode called XTS. It's pretty well vetted and has withstood some serious abuse from some powerful attackers (such as the US Government).From examining the p7zip source code, it appears that AES encoding for the 7-zip format operates in CBC mode. This is certainly not necessarily insecure; it's the mode most popularly used in protocols such as TLS, but it is potentially vulnerable to padding oracle attacks. See this discussion on operation modes for more information.
Key Derivation
Truecrypt uses PBKDF2 to turn your password into an encryption key. It's difficult to come up with a better alternative than that. p7zip uses a salted SHA256 hash repeated over a configurable number of iterations. PBKDF2 is a bit more configurable, but 7-zip's alternative is functionally similar and arguably reaches the same goals.
