- mbed-tls - lists.trustedfirmware.org

Re: [mbed-tls] mbedtls_x509_crt_parse returned -0x2180

by Gilles Peskine

Hello, The first thing when you see an unexpected error code is to look up the corresponding error message. Mbed TLS comes with a utility for that: programs/util/strerror 0x2180 Last error was: -0x2180 - X509 - The CRT/CRL/CSR format is invalid, e.g. different type expected You can also search the error code in the source code: grep 0x2180 include/mbedtls/*.h include/mbedtls/x509.h:#define MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180 /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */ At first glance it looks like there's only one case for which CRT parsing return MBEDTLS_ERR_X509_INVALID_FORMAT as opposed to (MBEDTLS_ERR_X509_INVALID_FORMAT + low_level_error_code), and that's if the certificate doesn't parse like a DER format at the top level. A plausible reason for that is that the certificate is in PEM format and your build has PEM support turned off. If that's the case, convert the certifcate to DER when you copy it to the device. You can use the Mbed TLS utility programs/util/pem2der for that. Best regards, -- Gilles Peskine Mbed TLS developer On 05/07/2021 18:10, Danny Backx via mbed-tls wrote: > > Hi, > > I must be missing something obvious but my code (on an ESP32) fails to > accept an incoming connection. > > I tried the same certificate on an ESP32 sample, and it appears to > work there. > > Does anyone have a clue where to look next ? > > Danny > > I (16:06:51.481) esp_https_server: performing session handshake > E (16:06:51.483) x509_crt: x509_crt_parse_der_core -> 0x2180 > E (16:06:51.484) esp_tls_mbedtls: set_pki_context: public_cert > 0x3ffdb924, len 5750 -> ret 0x2180 > E (16:06:51.493) esp-tls-mbedtls: mbedtls_x509_crt_parse returned -0x2180 > E (16:06:51.501) esp-tls-mbedtls: Failed to set server pki context > E (16:06:51.508) esp-tls-mbedtls: Failed to set server configurations > E (16:06:51.515) esp-tls-mbedtls: create_ssl_handle failed > E (16:06:51.521) esp_https_server: esp_tls_create_server_session failed > W (16:06:51.528) httpd: httpd_accept_conn: session creation failed > W (16:06:51.538) httpd: httpd_server: error accepting new connection > > -- > Danny Backx - dannybackx(a)telenet.be - http://danny.backx.info >

3 years, 12 months

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mbedtls_x509_crt_parse returned -0x2180

by Danny Backx

Hi, I must be missing something obvious but my code (on an ESP32) fails to accept an incoming connection. I tried the same certificate on an ESP32 sample, and it appears to work there. Does anyone have a clue where to look next ? Danny I (16:06:51.481) esp_https_server: performing session handshake E (16:06:51.483) x509_crt: x509_crt_parse_der_core -> 0x2180 E (16:06:51.484) esp_tls_mbedtls: set_pki_context: public_cert 0x3ffdb924, len 5750 -> ret 0x2180 E (16:06:51.493) esp-tls-mbedtls: mbedtls_x509_crt_parse returned -0x2180 E (16:06:51.501) esp-tls-mbedtls: Failed to set server pki context E (16:06:51.508) esp-tls-mbedtls: Failed to set server configurations E (16:06:51.515) esp-tls-mbedtls: create_ssl_handle failed E (16:06:51.521) esp_https_server: esp_tls_create_server_session failed W (16:06:51.528) httpd: httpd_accept_conn: session creation failed W (16:06:51.538) httpd: httpd_server: error accepting new connection -- Danny Backx - dannybackx(a)telenet.be - http://danny.backx.info

3 years, 12 months

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Hardware CCM decrypt failure

by Navin Reddy

Hello everyone, I am currently evaluating SSL with a local server and an STM32 device. I'm unable to figure out why the decryption fails with CCM as the cipher suite. FYI: I am using MbedTLS *v2.14.1.* *Setup*: I'm using *x86 local server* with *STM32* device as a client. Here is what happens- 1. Software CCM implementation on the client: When I use the *software* implementation of the CCM. Handshake and decryption is *successful*. Therefore, I can stream the data from STM32 and read it on the local server. 2. Hardware CCM implementation with MBEDTLS_CCM_ALT: I have used ccm_alt.c provided from STM32Cube v1.9.0. Here, the handshake is successful. But *decrypting* the message *fails*. The errors are: ssl_decrypt_buf() returned -29056 (-0x7180) mbedtls_ssl_read_record() returned -29056 (-0x7180) Checks performed: - Same certificates are used for SW and HW implementations. - CCM self test returns '0' for both HW and SW CCM implementations. - I have reserved enough heap, no memory issues. Please find all the necessary data in the attachment provided. I have added the logs from the server and the client. I have added the certificates and the code files as well. It would be of great help if somebody could point at what might be going wrong. Thank you! Best regards, Navin

3 years, 12 months

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Re: [mbed-tls] Is the a version that can use the EdDSA signature algorithm currently?

by Janos Follath

Hi Shudong, Mbed TLS currently does not provide EdDSA. The contribution by @aurel32 is a first step in this direction. The work leading up to a fully functional EdDSA implementation is tracked here: https://github.com/ARMmbed/mbedtls/projects/2#column-11150355 Kind regards, Janos From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of Shudong Zhang via mbed-tls <mbed-tls(a)lists.trustedfirmware.org> Date: Wednesday, 30 June 2021 at 07:28 To: mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org> Subject: [mbed-tls] Is the a version that can use the EdDSA signature algorithm currently? Hello, I want to use EdDSA signature algorithm, but I did’t find API for it in 2.26.0.Then I searched in the issue of Github and I found @aurel32 contributed some code about ed25519.But I am still not sure whether there are any versions under development that provide interface functions for EdDSA signature algorithm. Can someone help me answer my question? Thanks and kind regards, Shudong

4 years

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Is the a version that can use the EdDSA signature algorithm currently?

by Shudong Zhang

Hello, I want to use EdDSA signature algorithm, but I did’t find API for it in 2.26.0.Then I searched in the issue of Github and I found @aurel32 contributed some code about ed25519.But I am still not sure whether there are any versions under development that provide interface functions for EdDSA signature algorithm. Can someone help me answer my question? Thanks and kind regards, Shudong

4 years

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How to include alternate name in CSR

by Danny Backx

Hi, I have an ACME client library for esp32, and I try to extend it to support multiple host names. First step is to include alternate names in the CSR. After I tried the ARMmbed issues forum, I was pointed to this list. My code is in http://svn.code.sf.net/p/esp32-acme-client/code/trunk/libraries/acmeclient/… <http://svn.code.sf.net/p/esp32-acme-client/code/trunk/libraries/acmeclient/…> (see function Acme::CreateAltUrlList) , the function below is an attempt to do what I described, but doesn't work. Can anyone help ? Danny int Acme::CreateAltUrlList(mbedtls_x509write_csr req) { int l = 20; int ret; for (int i=0; alt_urls[i]; i++) { l += strlen(alt_urls[i]) + 20; } unsigned char *buf = (unsigned char *)malloc(l), *p = buf + l; int len = 0; for (int i=0; alt_urls[i]; i++) { MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_raw_buffer(&p, buf, (const unsigned char *)alt_urls[i], strlen(alt_urls[i]))); MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&p, buf, strlen(alt_urls[i]))); MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(&p, buf, MBEDTLS_ASN1_CONTEXT_SPECIFIC | 2)); } MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(&p, buf, len)); MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(&p, buf, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)); if ((ret = mbedtls_x509write_csr_set_extension(&req, MBEDTLS_OID_SUBJECT_ALT_NAME, MBEDTLS_OID_SIZE(MBEDTLS_OID_SUBJECT_ALT_NAME), (const unsigned char *)p, len)) != 0) { char errbuf[80]; mbedtls_strerror(ret, errbuf, sizeof(errbuf)); ESP_LOGE(acme_tag, "%s: mbedtls_x509write_csr_set_extension failed %s (0x%04x)", *__FUNCTION__*, errbuf, -ret); } free(buf); ESP_LOGD(acme_tag, "%s: ret %d", *__FUNCTION*__, ret); return ret; } -- Danny Backx - dannybackx(a)telenet.be - http://danny.backx.info

4 years

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Re: [mbed-tls] List archive?

by Shebu Varghese Kuriakose

Hi David, Archive can be found here https://lists.trustedfirmware.org/pipermail/mbed-tls/ https://lists.trustedfirmware.org/pipermail/psa-crypto/ Regards, Shebu -----Original Message----- From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> On Behalf Of David Higton via mbed-tls Sent: Friday, June 25, 2021 2:51 PM To: mbed-tls(a)lists.trustedfirmware.org Subject: [mbed-tls] List archive? Hi everybody, I've just joined the list. The first thing I did was to try to find an archive of list postings, but I haven't found one. Is there one, and, if so, where do I find it? The information may have been staring me in the face; if that's the case, I apologise. David -- mbed-tls mailing list mbed-tls(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls

4 years

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List archive?

by David Higton

Hi everybody, I've just joined the list. The first thing I did was to try to find an archive of list postings, but I haven't found one. Is there one, and, if so, where do I find it? The information may have been staring me in the face; if that's the case, I apologise. David

4 years

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Re: [mbed-tls] Is TCP integrated in mbed-TLS?

by Janos Follath

Hi Anasasija, Mbed TLS is entirely agnostic of the communication channel or protocol. You can configure it to use any underlying layer, like TCP, UDP or even just a local buffer. That said, we have a module that makes it more convenient to use Mbed TLS with TCP (or UDP) on common platforms: https://github.com/ARMmbed/mbedtls/blob/development/include/mbedtls/net_soc… You can see an example for using the module in several sample applications, for example: https://github.com/ARMmbed/mbedtls/blob/development/programs/ssl/ssl_client… and https://github.com/ARMmbed/mbedtls/blob/development/programs/ssl/ssl_server… Kind regards, Janos From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of 1637062--- via mbed-tls <mbed-tls(a)lists.trustedfirmware.org> Date: Friday, 25 June 2021 at 09:27 To: mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org> Subject: [mbed-tls] Is TCP integrated in mbed-TLS? Hello, I am a Student and for my bachelor thesis I am working on a tool that is able to detect whether a server is vulnerable regarding Bleichenbacher's attack or not, testing multiple side channels. For this I am looking for a TLS implementation that has the TCP protocol integrated and generates the TCP messages. I was wondering if mbed-tls has the TCP integrated in the implementation or not. If so, I could make use of this information, too. Thanks and kind regards, Anastasija -- mbed-tls mailing list mbed-tls(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls

4 years

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Re: [mbed-tls] mbed-tls Digest, Vol 16, Issue 12

by Janos Follath

Hi Lijin, It still can be the endianness of the keys. If the key is reversed, there won’t be any discernible pattern or relationship between the derived secrets. Regards, Janos From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of T V LIJIN (EXT) via mbed-tls <mbed-tls(a)lists.trustedfirmware.org> Date: Friday, 25 June 2021 at 09:15 To: mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org> Subject: Re: [mbed-tls] mbed-tls Digest, Vol 16, Issue 12 Hello, We couldn't see word swap in the output from both the end. Issue doesn't look related to the endianness. Could you please confirm that the code used for ECDHE key exchange is proper? SHARED_SECRET (Computed on Client): 11 36 F7 DB 2B 14 BB 86 1C A0 FC DF 6D 4D 17 70 BE 4F D8 58 C2 11 67 10 42 D7 47 EB 14 4B 10 5E SHARED_SECRET(Computed on Sever): c6 96 d9 f0 ec 37 be 9e 1a 60 a4 5f 88 f2 13 d3 bb 98 15 3f 3b d9 81 37 c6 10 12 85 e5 8b 49 16 Thanks, LIJIN T V ________________________________ From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of mbed-tls-request(a)lists.trustedfirmware.org <mbed-tls-request(a)lists.trustedfirmware.org> Sent: Friday, June 25, 2021 4:52 AM To: mbed-tls(a)lists.trustedfirmware.org <mbed-tls(a)lists.trustedfirmware.org> Subject: mbed-tls Digest, Vol 16, Issue 12 This message is from an external sender. Be cautious, especially with links and attachments. Send mbed-tls mailing list submissions to mbed-tls(a)lists.trustedfirmware.org To subscribe or unsubscribe via the World Wide Web, visit https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.tru… or, via email, send a message with subject or body 'help' to mbed-tls-request(a)lists.trustedfirmware.org You can reach the person managing the list at mbed-tls-owner(a)lists.trustedfirmware.org When replying, please edit your Subject line so it is more specific than "Re: Contents of mbed-tls digest..." Today's Topics: 1. ECDHE Shared Secret is computed differently (T V LIJIN (EXT)) 2. Re: ECDHE Shared Secret is computed differently (Brian D.) 3. How does the bignum.c works? (Shariful Alam) ---------------------------------------------------------------------- Message: 1 Date: Thu, 24 Jun 2021 13:35:03 +0000 From: "T V LIJIN (EXT)" <lijin.tv(a)kone.com> To: "mbed-tls(a)lists.trustedfirmware.org" <mbed-tls(a)lists.trustedfirmware.org> Subject: [mbed-tls] ECDHE Shared Secret is computed differently Message-ID: <AS8PR07MB8006A77D2451AD93FAFDA3D8FE079(a)AS8PR07MB8006.eurprd07.prod.outlook.com> Content-Type: text/plain; charset="iso-8859-1" Hello , We are trying to perform an ECDHE key exchange between two devices running on different platforms.[one on Linux and another on RTOS] Both the devices use the same code to compute the ECDHE shared secret. The peer public parameters are exchanged in the base64 format and passed to the functions correctly , but the final shared secret computed seems to be different on both ends. We have tested the same source code on Visual studio and found working. I have attached the source files Could you please comment on why the computed shared secret are different on both the ends? Thanks, LIJIN T V

4 years

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