- stunnel-users - stunnel.org

PKCS12 support patch
by Dmitry Bakshaev 19 May '16

19 May '16

googling internet about using certificate and keys from PKCS12 file lead to convert it to PEM. it requires some additional utilities (openssl not default windows application) and manual steps to convert. this patch allow using PKCS12 directly from stunnel. example configuration: cert = /home/dab/.certs/my.p12 PKCS12-files detected by file extension (.p12 or .pfx, no case sensetive) and load specially. password prompted if needed, empty password also supported. code based on examples from: https://groups.google.com/forum/#!topic/mailing.openssl.users/iuBmSqwsIG4 http://openssl-users.openssl.narkive.com/J0bR3cMA/ssl-ctx-use-privatekey-fi… patch tested on stunnel working on linux (gentoo: from our overlay http://bbgentoo.ilb.ru/repos/bbgentoo/bbgentoo_overlay/branches/drafts/net-… ) and windows.

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 18 May '16

18 May '16

On Wed, 2016-05-18 07:24:52 +0000, David Faizulaev wrote: > Do you concatenate the self-signed certificate to the current CA? This self-signed certificate /is/ the current CA certificate, as it is the root of the peer's certificate chain and you trust it. Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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SSL Labs: Session resumption IDs assigned but not accepted
by Brandon Jackson 17 May '16

17 May '16

Trying to find out why SSL Labs is giving this message Session resumption (caching): No (IDs assigned but not accepted) I have this in the config. sessionCacheSize = 1000 sessionCacheTimeout = 86400 ---------------------------------- Brandon Jackson bojack1437(a)gmail.com

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 17 May '16

17 May '16

On Tue, 2016-05-17 13:50:04 +0000, David Faizulaev wrote: > Hello, > > I've tried changing the value of 'verify' to 0 & 1, in both cases I get the following: > > 2016.05.17 16:40:25 LOG3[285]: SSL_connect: 14090086: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed > 2016.05.17 16:40:25 LOG5[285]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket > 2016.05.17 16:40:25 LOG4[285]: Possible memory leak at .\crypto\asn1\tasn_new.c:179: 11859 allocations > 2016.05.17 16:40:25 LOG4[285]: Possible memory leak at .\crypto\asn1\asn1_lib.c:408: 11241 allocations Strange. I never used verify = 0, but I had the understanding, stunnel should accept a connection even if the peer's certificate can't be verified. Anyhow, what happens if you add the self-signed certificate presented by the peer to the CA file? Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 17 May '16

17 May '16

On Tue, 2016-05-17 13:33:31 +0000, David Faizulaev wrote: > Between each certificate block I have the following block: > > Bag Attributes > friendlyName: trustcenterclass2caii > 2.16.840.1.113894.746875.1.1: <Unsupported tag 6> > subject=/C=DE/O=TC TrustCenter GmbH/OU=TC TrustCenter Class 2 CA/CN=TC TrustCenter Class 2 CA II > issuer=/C=DE/O=TC TrustCenter GmbH/OU=TC TrustCenter Class 2 CA/CN=TC TrustCenter Class 2 CA II > > possible cause? No, this should be ignored as a comment. But you instructed stunnel to check the peer's certificate against the trusted ones (verify = 2), and the certificate chain the peer presents ends with a certificate not found in the CA file. Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 17 May '16

17 May '16

On Tue, 2016-05-17 13:24:38 +0000, David Faizulaev wrote: > Logs messages are generated upon connection attempt. Then the server presents a certificate that can't be validated against the trusted certificates stored to the file you specified with CAfile=... Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 17 May '16

17 May '16

On Tue, 2016-05-17 13:08:33 +0000, David Faizulaev wrote: > Latest update: > After further investigation, it became evident that Stunnel should run as client. > Therefore, I've converted my existing certs file (from my application) into a PEM file. > The file includes -----BEGIN CERTIFICATE----- & -----END CERTIFICATE-----. > > But I still get an error: > > 2016.05.17 15:57:24 LOG4[281]: CERT: Pre-verification error: self signed certificate in certificate chain > 2016.05.17 15:57:24 LOG4[281]: Rejected by CERT at depth=1: CN=NextnineCA > 2016.05.17 15:57:24 LOG3[281]: SSL_connect: 14090086: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed > > Here is the current configuration: > > [custom] > client = yes > accept = 127.0.0.1:8449 > connect = 192.168.220.62:443 > verify = 2 > CAfile = myapp.pem David, CAfile should point to a list of trusted certificates. The file(s) for your pair of certificate and key should be specified with cert=... (and key=..., if certificate and key are stored to separate files). Are the log messages generated at stunnel startup or at connection establishment? Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 17 May '16

17 May '16

On Tue, 2016-05-17 11:13:26 +0000, David Faizulaev wrote: > I see, I have a keystore file for the server, can it be set as KEY ? can I convert keystore to PEM? I don't know. Some key/certificate repositories don't allow to export private keys. Maybe there is a PKCS11 plug-in for OpenSSL to access the keystore. If this is the case, you don't have to export your private key. But again, I don't know. > Additionally, I've thought about configuring Stunnel in client mode. > Here is the configuration: > [..] Running stunnel in client or server mode makes no difference w.r.t. certificate and key files. As long as stunnel is not able to access your private key, the client mode won't work either. HTH, Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Re: [stunnel-users] Configuring Stunnel to work between client and server - possible certificate issue
by Ludolf Holzheid 17 May '16

17 May '16

On Tue, 2016-05-17 08:29:17 +0000, David Faizulaev wrote: > Hello Ludolf, > > I've printed the content of certificate file and the lines: "-----BEGIN CERTIFICATE-----" "-----END CERTIFICATE-----" exist. > In addition, I've compared the default certificate provided by Stunnel with the one I wish to use, they're structure is identical. Hello David, Please reply to the list, so others are able to comment too. I don't know the 'default certificate provided by Stunnel'. I expect it to be depending on the distribution. However, if there are "BEGIN/END CERTIFICATE" lines in your file, but no "BEGIN/END RSA PRIVATE KEY", then the file is in PEM format, but the key is missing. Maybe you have separate files for private key and certificate. If this is the case, you may either concatenate key and certificate to a single file or specify both files in the stunnel configuration: >> key = my-private-key.pem >> cert = my-certificate.pem Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Configuring Stunnel to work between client and server - possible certificate issue
by David Faizulaev 17 May '16

17 May '16

Hello, I've found Stunnel as a potential answer to securely moving traffic between two machines. But I'm having some difficulties configuring the software. I've installed it on to the client machine and configured the client to connect to 127.0.0.1:8449 while the Server to which the client needs to connect is 192.168.220.72:8447 In the stunnel.conf I've set the following: [custom] accept = 127.0.0.1:8449 connect = 192.168.220.72:8447 cert = 220.72.cer TIMEOUTclose = 0 Upon initializing Stunnel I get the following error: 2016.05.16 19:14:04 LOG3[main]: error queue: 140B0009: error:140B0009:SSL routines:SSL_CTX_use_PrivateKey_file:PEM lib 2016.05.16 19:14:04 LOG3[main]: SSL_CTX_use_PrivateKey_file: 906D06C: error:0906D06C:PEM routines:PEM_read_bio:no start line 2016.05.16 19:14:04 LOG3[main]: Service [custom]: Failed to initialize SSL context 2016.05.16 19:14:04 LOG3[main]: Failed to reload the configuration file What can be the cause? Thanks in advance. Best Regards, David. [logo_tagline_Sig] David Faizulaev | PL/SQL Developer | T +972 (3) 767 3026<tel:%2B97237673012> | M +972 (54) 7314<tel:%2B972528466746>687 Centralized OT Security Management for Distributed SCADA/ICS Networks P Please consider the environment before printing this e-mail

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