DICOM @ OFFIS

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 Forum: DCMTK - General   Topic: DICOM Encryption.

 Post subject: Re: DICOM Encryption.
Posted: Wed, 2018-02-21, 21:38 

Replies: 3
Views: 839


Hi, in DICOM TLS is used for secure transmission over the network. In DCMTK, the dcmtls module implements TLS for DICOM (using OpenSSL for the TLS functionality). The tools storescu and storescu from the dcmnet module can be used for testing, if DCMTK is compiled with OpenSSL support. Best, Michael...

 Forum: DCMTK - General   Topic: Open SSL Cipher Suites

 Post subject: Re: Open SSL Cipher Suites
Posted: Mon, 2018-02-19, 20:02 

Replies: 10
Views: 169


Well, at this point you'll probably have to check things with the debugger. I noticed that the new cipher suites you refer to are TLSv1.2 suites. You should probably check which TLS version is proposed by the client, and which version(s) the server is willing to accept. The error code "unspeci...

 Forum: DCMTK - General   Topic: Open SSL Cipher Suites

 Post subject: Re: Open SSL Cipher Suites
Posted: Fri, 2018-02-16, 03:22 

Replies: 10
Views: 169


In order to add support for a specific TLS ciphersuite in DCMTK, you have to do the following: ⋅  Make sure that the ciphersuite is supported in the OpenSSL library you compile against (e.g. OpenSSL 1.1.0 needs to be compiled with specific flags to enable 3DES) ⋅  Add the cipher...

 Forum: DCMTK - General   Topic: Open SSL Cipher Suites

 Post subject: Re: Open SSL Cipher Suites
Posted: Fri, 2018-02-16, 02:29 

Replies: 10
Views: 169


To the OP: DICOM Supplement 204 (currently being Letter Ballot ) will introduced exactly these four cipher suites as part of the new "Non-Downgrading BCP195 TLS Profile". Implementing support for it is already on our to-do list . Hi Jörg, Thanks for the info. So once in place, - Best Prac...

 Forum: DCMTK - General   Topic: Open SSL Cipher Suites

 Post subject: Re: Open SSL Cipher Suites
Posted: Mon, 2018-02-12, 21:41 

Replies: 10
Views: 169


I only have a few general remarks: ⋅  Make sure that the desired ciphersuites are supported by your OpenSSL version (check with "openssl ciphers -v"). ⋅  If they are not supported, check whether a newer version supports them or whether you need to enable them by some s...

 Forum: DCMTK - General   Topic: Open SSL Cipher Suites

 Post subject: Re: Open SSL Cipher Suites
Posted: Mon, 2018-02-12, 20:19 

Replies: 10
Views: 169


I want to test cipher suite support for a DICOM server for the following cipher suites: TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 As a start I tried to check support for these using dcmtk binar...

 Forum: DCMTK - Installation   Topic: DCMTK on visual studio 2017 with ssl

Posted: Mon, 2018-02-12, 20:18 

Replies: 15
Views: 2302


Hi, I have one question about the binaries you supplied. When we use the OpenSSL binaries under Windows compiled by Offis (that one supplied using the link in this posting), the cipher suite “TLS_RSA_WITH_3DES_EDE_CBC_SHA” (defined as "DES-CBC3-SHA" in OpenSSL) is not supported (and this ...

 Forum: DCMTK - Installation   Topic: DCMTK on visual studio 2017 with ssl

Posted: Sun, 2018-02-04, 10:42 

Replies: 15
Views: 2302


<Post moved to : Openssl cipher suites>

 Forum: DCMTK - General   Topic: Open SSL Cipher Suites

 Post subject: Open SSL Cipher Suites
Posted: Sun, 2018-02-04, 10:30 

Replies: 10
Views: 169


I want to test cipher suite support for a DICOM server for the following cipher suites: TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 As a start I tried to check support for these using dcmtk binari...
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