November 2020 - mbed-tls - lists.trustedfirmware.org

by Gilles Peskine

I forgot to mention that there is a work in progress to add PKCS#7 parsing: https://github.com/ARMmbed/mbedtls/pull/3431 This is an external contribution so its addition to Mbed TLS depends not only on us maintainers' review bandwidth, but also on the availability of the kind contributor. I'm not familiar with .p7* formats so I don't know whether the support added by this pull request is sufficient to cover all of those. -- Gilles Peskine Mbed TLS developer On 06/11/2020 13:50, Alvaro Gonzalez via mbed-tls wrote: > > Hello mbed-tls mailing list. > > ï¿½ > > Does mbed-tls comply PKCS7? Can handle .p7, .p7b and/or .p7a extension > files? > > ï¿½ > > Best Regards. > > ï¿½ > >

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Re: [mbed-tls] PKCS7 Generation Contribution

by Gilles Peskine

Hi Nick, It would be great to have even partial support of PKCS#7 in Mbed TLS and we would welcome your contribution! You can find some guidance in CONTRIBUTING.md (https://github.com/ARMmbed/mbedtls/blob/development/CONTRIBUTING.md). Feel free to ask on the mailing list if anything is unclear. Note that there is a work in progress for adding PKCS#7 parsing: https://github.com/ARMmbed/mbedtls/pull/3431 . It may help to see what it does, but also note the review comments that point out some remaining issues. If you and naynajain work on parsing and generation at the same time, you'll need to synchronize since both sides will need to create pkcs7.[hc]. -- Gilles Peskine Mbed TLS developer On 10/11/2020 17:28, Nick Child via mbed-tls wrote: > Hello, > > For one of my projects, I had to create a PKCS7 generation/builder. I > noticed mbedtls currently has no support for PKCS7. After much trial > and error, I was able to use mbedtls functions to create a PKCS7 > structure for Signed Data. I was wondering if this something that > might be useful in later versions of mbedtls? The code currently has a > long way to go until it meets mbedtls coding standards, but I figured > I would ask if it is even possible and worth the efforts before > getting into it. I am also a rookie when it comes to open source > contributions, so I was hoping for some guidance regarding merging > upstream. > > Thanks for your time, > > Nick Child >

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PKCS7 Generation Contribution

by Nick Child

Hello, For one of my projects, I had to create a PKCS7 generation/builder. I noticed mbedtls currently has no support for PKCS7. After much trial and error, I was able to use mbedtls functions to create a PKCS7 structure for Signed Data. I was wondering if this something that might be useful in later versions of mbedtls? The code currently has a long way to go until it meets mbedtls coding standards, but I figured I would ask if it is even possible and worth the efforts before getting into it. I am also a rookie when it comes to open source contributions, so I was hoping for some guidance regarding merging upstream. Thanks for your time, Nick Child

4 years

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Re: [mbed-tls] PKCS7 compliance

by Gilles Peskine

Hello, No, unfortunately Mbed TLS does not support the PKCS#7 CMS format. Contributions would be welcome. -- Gilles Peskine Mbed TLS developer On 06/11/2020 13:50, Alvaro Gonzalez via mbed-tls wrote: > > Hello mbed-tls mailing list. > > ï¿½ > > Does mbed-tls comply PKCS7? Can handle .p7, .p7b and/or .p7a extension > files? > > ï¿½ > > Best Regards. > > ï¿½ > >

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Re: [mbed-tls] TLS-SRP Support

by Gilles Peskine

Hello, Mbed TLS does not currently support SRP and it is not on our roadmap (https://developer.trustedfirmware.org/w/mbed-tls/roadmap/). Arm does not intend to work on it, but support can be added if someone else contributes it. If you are interested in contributing SRP support, please discuss it on this list first to settle some potential issues: conflicts with other work (in particular TLS 1.3 preparation, which involves some refactoring of existing TLS code), review bandwidth schedule, test plan. -- Gilles Peskine Mbed TLS developer On 09/11/2020 14:01, Gijs Peskens via mbed-tls wrote: > > For an Open Source project we started using Mbed-TLS to do AES > encryption and, in a future version, will use Mbed-TLS for DTLS. > Part of the protocol we support requires TLS-SRP (either via DTLS or > via EAP), I’m unable to find anything relating to TLS-SRP support. > > Does Mbed-TLS support TLS-SRP currently? And if not is there intention > to add it in a future release? > > Br, > > Gijs Peskens > >

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Re: [mbed-tls] TLS-SRP Support

by Janos Follath

Hi Gijs, I am not sure what TLS-SRP support is, could you please point me to the standard defining it? Best regards, Janos From: mbed-tls <mbed-tls-bounces(a)lists.trustedfirmware.org> on behalf of Gijs Peskens via mbed-tls <mbed-tls(a)lists.trustedfirmware.org> Reply to: Gijs Peskens <gijsje(a)heteigenwijsje.nl> Date: Monday, 9 November 2020 at 13:02 To: "mbed-tls(a)lists.trustedfirmware.org" <mbed-tls(a)lists.trustedfirmware.org> Subject: [mbed-tls] TLS-SRP Support For an Open Source project we started using Mbed-TLS to do AES encryption and, in a future version, will use Mbed-TLS for DTLS. Part of the protocol we support requires TLS-SRP (either via DTLS or via EAP), I’m unable to find anything relating to TLS-SRP support. Does Mbed-TLS support TLS-SRP currently? And if not is there intention to add it in a future release? Br, Gijs Peskens

4 years

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TLS-SRP Support

by Gijs Peskens

For an Open Source project we started using Mbed-TLS to do AES encryption and, in a future version, will use Mbed-TLS for DTLS. Part of the protocol we support requires TLS-SRP (either via DTLS or via EAP), I’m unable to find anything relating to TLS-SRP support. Does Mbed-TLS support TLS-SRP currently? And if not is there intention to add it in a future release? Br, Gijs Peskens

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PKCS7 compliance

by Alvaro Gonzalez

Hello mbed-tls mailing list. Does mbed-tls comply PKCS7? Can handle .p7, .p7b and/or .p7a extension files? Best Regards.

4 years

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Re: [mbed-tls] Chinese characters garbled after calling mbedtls_x509_crt_info() or mbedtls_x509_dn_gets()

by Janos Follath

Hi Newt, This is normal and happens not just to Chinese characters, but to all non-ASCII characters. This supposed to be a feature of Mbed TLS, to ensure that we return something printable whether the platform can handle the original encoding or not. Of course we can consider providing a way to add an option to disable this feature: if you would like to submit a PR, please let us discuss first what can be done. If you wouldn't like to submit a PR, then please raise an issue on github for this feature request. Until this feature is implemented, you can access the original encoding in the `val` field of the `mbedtls_x509_name` parameter you would be passing to `mbedtls_x509_dn_gets()`. Regards, Janos On 06/11/2020, 03:54, "mbed-tls on behalf of 马瑞宜 via mbed-tls" <mbed-tls-bounces(a)lists.trustedfirmware.org on behalf of mbed-tls(a)lists.trustedfirmware.org> wrote: Hello everyone, I have this certificate blob and I'm using mbedtls to read this, but after called mbedtls_x509_crt_info() or mbedtls_x509_dn_gets(), the chinese characters got garbled. I have googled this, read the mbedtls knowledge base and searched the issues and got no luck. The field i want to parse is the subject field and the issuer field. and currently I cannot provide the certificate blob due to security reasons. Any help would be much appreciated. Sincerely, Newt Ma -- mbed-tls mailing list mbed-tls(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls

4 years

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Chinese characters garbled after calling mbedtls_x509_crt_info() or mbedtls_x509_dn_gets()

by 马瑞宜

Hello everyone, I have this certificate blob and I'm using mbedtls to read this, but after called mbedtls_x509_crt_info() or mbedtls_x509_dn_gets(), the chinese characters got garbled. I have googled this, read the mbedtls knowledge base and searched the issues and got no luck. The field i want to parse is the subject field and the issuer field. and currently I cannot provide the certificate blob due to security reasons. Any help would be much appreciated. Sincerely, Newt Ma

4 years

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mbed-tls November 2020