- mbed-tls - lists.trustedfirmware.org

Official release with mutual authentication support

by Tove Rumar

Hello! Is there a time plan for when there will be an official release with TLS 1.3 (Client) that supports mutual authentication? Kind Regards Tove Rumar Software Engineer u-blox Malmo Östra Varvsgatan 4 SE- Malmö www.u-blox.com<https://www.u-blox.com> Reliable. Smart. Secure.

4 years

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AES Memory Leak

by Subramanian Gopi Krishnan

Hi, I have developed a program to send encrypted data continuously. The program is working fine for few hours. After 6 to 8 Hrs, I get returned MBEDTLS_ERR_CIPHER_ALLOC_FAILED -0x6180 Do I need to free the gcm context for every time I send data? What would be the root cause. #define AEAD_KEY_SIZE (32) /**< AEAD Key Size(in bytes). */ #define AEAD_IV_SIZE (12) /**< AEAD IV Size(in bytes). */ #define AEAD_AD_SIZE (16) /**< AEAD AAD Size(in bytes). */ #define AEAD_TAG_SIZE (16) /**< AEAD Tag Size(in bytes). */ #define AEAD_ID_SIZE (4) /**< AEAD Tag Size(in bytes). */ #define MAX_CIPHER_SIZE (2048)/**< AEAD Cipher/Plaintext Segent Size unoperation(in bytes). */ typedef struct { mbedtls_gcm_context CtxAead; /**< aes-gcm 3rd party library context */ uint8_t pu8Key[AEAD_KEY_SIZE]; /**< Key - Randomly Generated */ uint8_t pu8InitVector[AEAD_IV_SIZE]; /**< Randomly Generated */ uint8_t pu8AddData[AEAD_AD_SIZE]; /**< Additional Associated Data - md5sum() */ uint8_t pu8Tag[AEAD_TAG_SIZE]; /**< Hold Digest/Tag of encryped data */ uint8_t pu8Id[AEAD_ID_SIZE]; /**< KeyID is generated */ uint8_t pu8Data[MAX_CIPHER_SIZE]; /**< Buffer to hold plain-text after decipher */ uint8_t pu8Cipher[MAX_CIPHER_SIZE]; /**< Buffer to hold cipher-text after cipher */ uint16_t u16Length; /**< Current length of buffer to encrypt/decrypt */ }S_Aead; int32_t i32Aead_EncryptionCycle(S_Aead *ctx ,uint8_t *pu8AddData, uint16_t u16Length ) { int32_t i32Ret = 0; if(NULL == ctx) { return (NULL_AEAD_CTX); } /* Initilaze GCM Context **/ mbedtls_gcm_init ( &(ctx->CtxAead) ); /*SETTING ADDITIONAL DATA as MD5 of incoming data **/ if( AEAD_AD_SIZE < u16Length ) { return (ERROR_INPUT_BUFFER_TOO_LONG); } memset( ctx->pu8AddData, 0x00, AEAD_AD_SIZE ); i32Ret = mbedtls_md5_ret(pu8AddData, u16Length, ctx->pu8AddData); if (i32Ret) { return (i32Ret); } /* symetric key for testing */ memset( ctx->pu8Key, 0xAB, AEAD_KEY_SIZE ) /* Setting the key */ if( i32Ret = mbedtls_gcm_setkey ( &(ctx->CtxAead), MBEDTLS_CIPHER_ID_AES, ctx->pu8Key, AEAD_KEY_SIZE*OCTETS ) ) { return (i32Ret); } while(1) { /* OS Wait for 1000ms for data to get ready */ if( OS_WaitSingleEventTimed( TX_DATA_BUFFER_READY, WAIT_1000MS ) ) { if( ctx->u16Length == 0 ) { /* No data ready for sending (or) timed-out */; continue; } /* New Initial Vector */ if( i32Ret = i32NewRandomByte( ctx->pu8InitVector, AEAD_IV_SIZE, "AEAD_NEW_IV_GENERATION" ) ) { return(i32Ret); } ctx->u16Length = u16Length; if( i32Ret = mbedtls_gcm_crypt_and_tag( &(ctx->CtxAead), MBEDTLS_GCM_ENCRYPT, ctx->u16Length, ctx->pu8InitVector, AEAD_IV_SIZE, ctx->pu8AddData, AEAD_AD_SIZE, ctx->pu8Data, ctx->pu8Cipher, AEAD_TAG_SIZE, ctx->pu8Tag)) { return(i32Ret); } if( ctx->u16Length == send_data(ctx->pu8Cipher, ctx->u16Length) ) { /* tx success*/ memset( ctx->pu8Data, 0x00, ctx->u16Length ); memset( ctx->pu8Cipher, 0x00, ctx->u16Length ); ctx->u16Length = 0; } } } /* Free GCM Context */ mbedtls_gcm_free( &(ctx->CtxAead) ); /* Reset context memory */ memset(ctx, 0, sizeof(S_Aead)); }

4 years, 1 month

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MBed TLS Technical Forum - reminder

by Don Harbin

Hi All, A gentle reminder that the US-Europe timezone-friendly MBed TLS Tech forum is next Monday. If you have any topics, please let Dave Rodgman know. :) Best regards, Don Harbin TrustedFirmware Community Manager don.harbin(a)linaro.org

4 years, 1 month

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signature verification of ECC type

by Sunil Jain

Hello, we are using mbedTLS version 2.16. We are facing a problem in verifying the signed message for ECDSA type of algorithms. Do you have any sample code for this as given for the RSA type algorithm in rsa_verify.c. We have derived the R and S values and their length, but we are not sure which context to use to verify the signature. Please help urgently. -- Regards, Sunil Jain

4 years, 1 month

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Re: How to verify in a server that session cache resumption was used for a given connection

by Eoin McMahon

Hi thanks for getting back to me, That's fine if it doesn't work in future releases, I will most likely stay on 3.0.0. Unfortunately when trying to add this line to the dtls_server example I get: error: dereferencing pointer to incomplete type 'mbedtls_ssl_handshake_params' {aka 'struct mbedtls_ssl_handshake_params'} int resumed = ssl.MBEDTLS_PRIVATE(handshake)->resume; ^~ my use case for this is to test a client's ability to connect to the server and use session caching, I want to essentially send messages to the server from a client, and have the server send a message back either 'session cache was used' or 'session cache was not used'.

4 years, 1 month

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Realization TLS 1.2. in libiec61850

by kirilllatyshov99＠gmail.com

Good afternoon, I'm trying to implement TLS 1.2. for MMS using the library libiec61850. When a connection is established, the interaction is interrupted at the stage "Client Key Exchange". Also, when monitoring the interaction through wireshark, I see that an error is displayed at the "Certificate Request" stage. I use default certificates, the project is built through CMake on Windows and TLS 1.1. works flawlessly. In the file tls_mbedtls.c I changed only the values of the minimum and maximum versions to TLS 1.2. Thank you in advance for your response.

4 years, 1 month

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Reminder: MBed TLS Technical Forum - Asia

by don.harbin＠linaro.org

Hi All, A gentle reminder that the Asia-Europe timezone-friendly MBest TLS Tech forum is next Monday. If you have any topics, please let Dave Rodgman know. :) Best regards, Don Title: MBed TLS Technical Forum - Asia Trusted Firmware is inviting you to a scheduled Zoom meeting. Topic: MBed TLS Technical Forum - Asia Time: Nov 8, 2021 10:00 AM London Every 4 weeks on Mon, 20 occurrence(s) Nov 8, 2021 10:00 AM Dec 6, 2021 10:00 AM Jan 3, 2022 10:00 AM Jan 31, 2022 10:00 AM Feb 28, 2022 10:00 AM Mar 28, 2022 10:00 AM Apr 25, 2022 10:00 AM May 23, 2022 10:00 AM Jun 20, 2022 10:00 AM Jul 18, 2022 10:00 AM Aug 15, 2022 10:00 AM Sep 12, 2022 10:00 AM Oct 10, 2022 10:00 AM Nov 7, 2022 10:00 AM Dec 5, 2022 10:00 AM Jan 2, 2023 10:00 AM Jan 30, 2023 10:00 AM Feb 27, 2023 10:00 AM Mar 27, 2023 10:00 AM Apr 24, 2023 10:00 AM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://linaro-org.zoom.us/meeting/tJ0kc-GsqDktHNGa8CWl6wJ7je6CKD-5zgh8/ics… Join Zoom Meeting https://linaro-org.zoom.us/j/99948462765?pwd=SGlHYlF1Z2owUDNFWWppaGlSRDh5UT… Meeting ID: 999 4846 2765 Passcode: 196117 One tap mobile +12532158782,,99948462765# US (Tacoma) +13462487799,,99948462765# US (Houston) Dial by your location +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) 888 788 0099 US Toll-free 877 853 5247 US Toll-free Meeting ID: 999 4846 2765 Find your local number: https://linaro-org.zoom.us/u/anpWWkRdt When: Mon Feb 28, 2022 3am – 3:50am Mountain Standard Time - Phoenix Who: * Don Harbin - creator * psa-crypto(a)lists.trustedfirmware.org * mbed-tls(a)lists.trustedfirmware.org * nnac123(a)gmail.com * santosdanillo(a)gmail.com

4 years, 1 month

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Re: ssl_server2 failed with mbedtls_ssl_handshake returned error -30976

by Dave Rodgman

Hi Dmitrij, (Please note, I've moved this question to the main Mbed TLS list as this is the right place for this kind of question). I've tested our example ssl_client2 against test.mosquitto.org, using a client certificate & key generated via https://test.mosquitto.org/ssl/index.php, and CA file from https://test.mosquitto.org/. This connects properly using the command line: ./ssl_client2 server_addr=test.mosquitto.org server_port=8884 ca_file=mosquitto.org.crt server_name=test.mosquitto.org crt_file=client.crt key_file=client.key Similarly, OpenSSL succeeds using the same certificates: openssl s_client -connect test.mosquitto.org:8884 -CAfile mosquitto.org.crt -servername test.mosquitto.org -cert client.crt -key client.key However, if I omit the client key (i.e. remove "-key client.key"), Mbed TLS fails in the manner you describe. It looks like you are not supplying the client key? Regards Dave Rodgman On 21/02/2022, 10:55, "Dmitrij Shabroff via Mbed-tls-announce via mbed-tls" <mbed-tls(a)lists.trustedfirmware.org> wrote: Good day Please answer my questions - there is very little literature on the topic. I do not know what to do. I have dealt with the message [2:40] issue. I did not enroll the user certificate using: if((ret = mbedtls_ssl_conf_own_cert(&conf, &clicert, &pkey))!= 0) and this certificate was not transmitted. Now I have taken it a step further, the certificate is successfully transferred and the server does not break the connection. I switched to TLS 1.3. ---------------------------------------------------------------------- But in your examples, I see the use of two certificates: mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL ); ret = mbedtls_ssl_conf_own_cert( &conf, &clicert, &pkey ) ) And also the key: ret = mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_cli_key, mbedtls_test_cli_key_len, NULL, 0, rng_get, &rng ); In my version, I only have a client certificate. I working with https://test.mosquitto.org/ Would you advise where to get the missing certificates and where to get the key for the mbedtls_pk_parse_key function? ---------------------------------------------------------------------- Now in both functions I use the same certificate and a PCA key from the example. I get a message: ..\Src\mbedTLS\library\ssl_msg.c:4645:got an alert message, type: [2:51] ..\Src\mbedTLS\library\ssl_msg.c:4653:is a fatal alert message (msg 51) ..\Src\mbedTLS\library\ssl_msg.c:3763:mbedtls_ssl_handle_message_type() returned -30592 (-0x7780) ..\Src\mbedTLS\library\ssl_msg.c:4771:mbedtls_ssl_read_record() returned -30592 (-0x7780) Sincerely, Shabrov Dmitry >Понедельник, 7 февраля 2022, 16:28 +03:00 от B Mahesh via Mbed-tls-announce via mbed-tls <mbed-tls(a)lists.trustedfirmware.org>: > >Hi , > > > >*Problem description :* > > > >Trying to run example >https://github.com/ARMmbed/mbedtls/blob/master/programs/ssl/ssl_server2.c . > >Updated ssl_server2 port to listen on 7777 for incoming client request >,ssl_server2 >will be waiting for remote connection continuously. > >There was no client request for connection on this port, but still server >is getting some spurious connection request and goes for handshake and >fails with below error code. > > > >Error code: mbedtls_ssl_handshake returned error -30976 > > > > >*Steps to reproduce: =============* > > 1. start ssl_server2 program > 2. Monitor for ssl_server2 connection waiting , observe ssl_server2 will > accept spurious connection request and goes for handshake and fails >with above > mentioned error code. > > > >*Expected behavior:* >ssl_server2 wait for remote connection infinitely and connect to valid >client request and perform handshake every time. > > >*Actual behavior:* >Occasionally ssl_server2 will accept spurious connection request and goes >for handshake and fails with below error code. > > > >Error code: >mbedtls_ssl_handshake returned error -30976 on ssl_server2 > > > >*Analysis:* > >As per below logs what we understand is ssl_server2 will accept spurious >connection request and goes for handshake and fails with error code >-30796 ,MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO >on ssl_server2 side . > > > >Can you please help us to understand this behavior? > >What could be the reason for ssl_server2 to connect to a spurious >connection request?, as mentioned above there was no client request for >connection on this ssl_server2 port( 7777) . > >We have tried this on other SERVER_PORT as well . > > > >*Logs Snippet:* > >*==========* > > > >. Seeding the random number generator... ok > > . Loading the CA root certificate ... ok (0 skipped) > > . Loading the server cert. and key... ok > > . Bind on tcp://*:7777/ ... ok > > . Setting up the SSL/TLS structure... ok > > . Waiting for a remote connection ...ok > > . Performing the SSL/TLS handshake... failed > > ! mbedtls_ssl_handshake returned -0x7900 > > > >Last error was: -30976 - SSL - Processing of the ClientHello handshake >message failed > > > > . Waiting for a remote connection ... ok > > . Performing the SSL/TLS handshake... failed > > ! mbedtls_ssl_handshake returned -0x7900 > > > >Last error was: -30976 - SSL - Processing of the ClientHello handshake >message failed > > > > . Waiting for a remote connection ... ok > > . Performing the SSL/TLS handshake... failed > > ! mbedtls_ssl_handshake returned -0x7900 > > > >Last error was: -30976 - SSL - Processing of the ClientHello handshake >message failed > > > >Regards >Mahesh >-- >Mbed-tls-announce mailing list -- mbed-tls-announce(a)lists.trustedfirmware.org >To unsubscribe send an email to mbed-tls-announce-leave(a)lists.trustedfirmware.org >-- >mbed-tls mailing list -- mbed-tls(a)lists.trustedfirmware.org >To unsubscribe send an email to mbed-tls-leave(a)lists.trustedfirmware.org -- Mbed-tls-announce mailing list -- mbed-tls-announce(a)lists.trustedfirmware.org To unsubscribe send an email to mbed-tls-announce-leave(a)lists.trustedfirmware.org -- mbed-tls mailing list -- mbed-tls(a)lists.trustedfirmware.org To unsubscribe send an email to mbed-tls-leave(a)lists.trustedfirmware.org

4 years, 1 month

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TLS PSK display X.509 verified

by Subramanian Gopi Krishnan

Hi, I am evaluating TLS PSK capability on mbedlts-2.16.12 by running following command. I modified TLS client to have only PSK and removed all private key and certificate related code. However, the servier indicated x.509 verification ok. What is it? ./a.out ok . Performing the SSL/TLS handshake... ok [ Protocol is TLSv1.2 ] [ Ciphersuite is TLS-PSK-WITH-AES-128-GCM-SHA256 ] [ Record expansion is 29 ] . Closing the connection... done ./ssl_server2 psk="AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" psk_list="Client_identity","AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" force_ciphersuite=TLS-PSK-WITH-AES-128-GCM-SHA256 . Seeding the random number generator... ok . Loading the CA root certificate ... ok (0 skipped) . Loading the server cert. and key... ok . Bind on tcp://*:4433/ ... ok . Setting up the SSL/TLS structure... ok . Waiting for a remote connection ... ok . Performing the SSL/TLS handshake... ok [ Protocol is TLSv1.2 ] [ Ciphersuite is TLS-PSK-WITH-AES-128-GCM-SHA256 ] [ Record expansion is 29 ] [ Maximum fragment length is 16384 ] . Verifying peer X.509 certificate... ok < Read from client: 34 bytes read GET / HTTP/1.0 Extra-header: > Write to client: 144 bytes written in 1 fragments HTTP/1.0 200 OK Content-Type: text/html <h2>mbed TLS Test Server</h2> <p>Successful connection using: TLS-PSK-WITH-AES-128-GCM-SHA256</p> . Closing the connection... done . Waiting for a remote connection ... Thanks, Gopi Krishnan

4 years, 1 month

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Re: TLS PSK display X.509 verified

by Hannes Tschofenig

Hi Gopi, When you say "I modified TLS client to have only PSK and removed all private key and certificate related code." did you set the C processor directives in the include/mbedtls/mbedtls_config.h file? To me it seems that you didn't do this and hence you still use the default configuration settings, which means that all PKI-related code is compiled into your binary. Ciao Hannes From: Subramanian Gopi Krishnan via mbed-tls <mbed-tls(a)lists.trustedfirmware.org<mailto:mbed-tls@lists.trustedfirmware.org>> Sent: Tuesday, February 22, 2022 12:15 PM To: mbed-tls(a)lists.trustedfirmware.org<mailto:mbed-tls@lists.trustedfirmware.org> Subject: [mbed-tls] TLS PSK display X.509 verified Hi, I am evaluating TLS PSK capability on mbedlts-2.16.12 by running following command. I modified TLS client to have only PSK and removed all private key and certificate related code. However, the servier indicated x.509 verification ok. What is it? ./a.out ok . Performing the SSL/TLS handshake... ok [ Protocol is TLSv1.2 ] [ Ciphersuite is TLS-PSK-WITH-AES-128-GCM-SHA256 ] [ Record expansion is 29 ] . Closing the connection... done ./ssl_server2 psk="AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" psk_list="Client_identity","AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" force_ciphersuite=TLS-PSK-WITH-AES-128-GCM-SHA256 . Seeding the random number generator... ok . Loading the CA root certificate ... ok (0 skipped) . Loading the server cert. and key... ok . Bind on tcp://*:4433/ ... ok . Setting up the SSL/TLS structure... ok . Waiting for a remote connection ... ok . Performing the SSL/TLS handshake... ok [ Protocol is TLSv1.2 ] [ Ciphersuite is TLS-PSK-WITH-AES-128-GCM-SHA256 ] [ Record expansion is 29 ] [ Maximum fragment length is 16384 ] . Verifying peer X.509 certificate... ok < Read from client: 34 bytes read GET / HTTP/1.0 Extra-header: > Write to client: 144 bytes written in 1 fragments HTTP/1.0 200 OK Content-Type: text/html <h2>mbed TLS Test Server</h2> <p>Successful connection using: TLS-PSK-WITH-AES-128-GCM-SHA256</p> . Closing the connection... done . Waiting for a remote connection ... Thanks, Gopi Krishnan

4 years, 1 month

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