>>>>>>> facing [ no shared cipher ] error with EC private keys. >>>>>> the client connecting to your instance has to support ecdsa >>>>>> >>>>>> >>>>> It does - Thunderbird 60.0b10 (64-bit) >>>>> >>>>> [ security.ssl3.ecdhe_ecdsa_aes_256_gcm_sha384;true ] >>>>> >>>>> It seems there is a difference between the private key (rsa vs. ecc -> >>>>> SSL_CTX?) used for the certificate signing request and the signed >>>>> certificate. >>>>> >>>>> The csr created from a private key with [ openssl genpkey -algorithm RSA >>>>> ] and signed by a CA with [ ecdhe_ecdsa ] works with no error. >>>>> >>>>> But as stated in the initial message it does not work if the private key >>>>> for the csr is generated with [ openssl ecparam -name brainpoolP512t1 >>>>> -genkey ]. >>>>> >>>>> >>>> Can you try, with your ECC cert, >>>> >>>> openssl s_client -connect server:143 -starttls imap >>>> >>>> and paste result? >>>> >>> This is for the certificate where the csr is generated with an EC >>> private key and the [ no shared cipher ] error: >>> >>> CONNECTED(00000003) >>> write:errno=0 >>> --- >>> no peer certificate available >>> --- >>> No client certificate CA names sent >>> --- >>> SSL handshake has read 309 bytes and written 202 bytes >>> Verification: OK >>> --- >>> New, (NONE), Cipher is (NONE) >>> Secure Renegotiation IS NOT supported >>> Compression: NONE >>> Expansion: NONE >>> No ALPN negotiated >>> SSL-Session: >>> Protocol : TLSv1.2 >>> Cipher : 0000 >>> Session-ID: >>> Session-ID-ctx: >>> Master-Key: >>> PSK identity: None >>> PSK identity hint: None >>> SRP username: None >>> Start Time: 1532969474 >>> Timeout : 7200 (sec) >>> Verify return code: 0 (ok) >>> Extended master secret: no >>> >>> --- >>> >>> and this for the certificate where the csr is generated with a RSA >>> private key: >>> >>> CONNECTED(00000003) >>> depth=0 C = 00, ST = CH, L = DC, O = foo.bar, OU = mail, CN = Server >>> foo.bar Mail IMAP >>> verify error:num=20:unable to get local issuer certificate >>> verify return:1 >>> depth=0 C = 00, ST = CH, L = DC, O = foo.bar, OU = mail, CN = Server >>> foo.bar Mail IMAP >>> verify error:num=21:unable to verify the first certificate >>> verify return:1 >>> --- >>> Certificate chain >>> 0 s:/C=00/ST=CH/L=DC/O=foo.bar/OU=mail/CN=Server foo.bar Mail IMAP >>> i:/C=00/ST=CH/O=foo.bar/OU=Server/CN=IM Server foo.bar >>> --- >>> Server certificate >>> -----BEGIN CERTIFICATE----- >>> [ truncated ] >>> -----END CERTIFICATE----- >>> subject=/C=00/ST=CH/L=DC/O=foo.bar/OU=mail/CN=Server foo.bar Mail IMAP >>> issuer=/C=00/ST=CH/O=foo.bar/OU=Server/CN=IM Server foo.bar >>> --- >>> No client certificate CA names sent >>> Peer signing digest: SHA512 >>> Server Temp Key: X25519, 253 bits >>> --- >>> SSL handshake has read 2361 bytes and written 295 bytes >>> Verification error: unable to verify the first certificate >>> --- >>> New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384 >>> Server public key is 4096 bit >>> Secure Renegotiation IS supported >>> Compression: NONE >>> Expansion: NONE >>> No ALPN negotiated >>> SSL-Session: >>> Protocol : TLSv1.2 >>> Cipher : ECDHE-RSA-AES256-GCM-SHA384 >>> Session-ID: >>> C23E6478F4C6372F2A524504031B32EDC9FDCAA343AE5017A09E47C5E7B60DD6 >>> Session-ID-ctx: >>> Master-Key: [ obfuscated ] >>> PSK identity: None >>> PSK identity hint: None >>> SRP username: None >>> Start Time: 1532969755 >>> Timeout : 7200 (sec) >>> Verify return code: 21 (unable to verify the first certificate) >>> Extended master secret: yes >>> --- >>> . OK Pre-login capabilities listed, post-login capabilities have more. >>> >>> >>> >> Can you configure ssl_cipher_list = ALL and try again? Also, can you send >> the *PUBLIC* part of the certificate? >> > [ ssl_cipher_list = ALL ] set/applied > > This is for the certificate where the csr is generated with an EC private key > and the [ no shared cipher ] error: > > CONNECTED(00000003) > write:errno=0 > --- > no peer certificate available > --- > No client certificate CA names sent > --- > SSL handshake has read 309 bytes and written 202 bytes > Verification: OK > --- > New, (NONE), Cipher is (NONE) > Secure Renegotiation IS NOT supported > Compression: NONE > Expansion: NONE > No ALPN negotiated > SSL-Session: > Protocol : TLSv1.2 > Cipher : 0000 > Session-ID: > Session-ID-ctx: > Master-Key: > PSK identity: None > PSK identity hint: None > SRP username: None > Start Time: 1532970888 > Timeout : 7200 (sec) > Verify return code: 0 (ok) > Extended master secret: no > > --- > > and this for the certificate where the csr is generated with a RSA > private key: > > CONNECTED(00000003) > depth=0 C = 00, ST = CH, L = DC, O = foo.bar, OU = mail, CN = Server > foo.bar Mail IMAP > verify error:num=20:unable to get local issuer certificate > verify return:1 > depth=0 C = 00, ST = CH, L = DC, O = foo.bar, OU = mail, CN = Server > foo.bar Mail IMAP > verify error:num=21:unable to verify the first certificate > verify return:1 > --- > Certificate chain > 0 s:/C=00/ST=CH/L=DC/O=foo.bar/OU=mail/CN=Server foo.bar Mail IMAP > i:/C=00/ST=CH/O=foo.bar/OU=Server/CN=IM Server foo.bar > --- > Server certificate > -----BEGIN CERTIFICATE----- > MIIFIjCCBIagAwIBAgICEAYwCgYIKoZIzj0EAwQwWTELMAkGA1UEBhMCMDAxCzAJ > BgNVBAgMAkNIMRAwDgYDVQQKDAd2dG9sLm1lMQ8wDQYDVQQLDAZTZXJ2ZXIxGjAY > BgNVBAMMEUlNIFNlcnZlciB2dG9sLm1lMB4XDTE4MDczMDExMTE1NloXDTE5MDcz > MDExMTE1NlowazELMAkGA1UEBhMCMDAxCzAJBgNVBAgMAkNIMQswCQYDVQQHDAJE > QzEQMA4GA1UECgwHdnRvbC5tZTENMAsGA1UECwwEbWFpbDEhMB8GA1UEAwwYU2Vy > dmVyIHZ0b2wubWUgTWFpbCBJTUFQMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC > CgKCAgEAx3Rr6Goz0xHmRGwTC5XWvTYLLXli9nhaSqpfSXSBNembIpAJMQxeZKS5 > T1VI1Kufp5HIpBFAXKo/yAMNS4E+LtctX2ITsZD1sUJw20J7TJtDR6mX7qiNJTlT > FXHx5VZWLp2Jv3Wlw85iNUoRcIY2IB3Q9KACTPlMl8Be9BPYAevgyqh5d67LFgwf > 77Soq4ppa0sLxTUf1Lyh9lvpIRdDnDhs749PlLrgWIagra2ONdesOlwMOANjn5+8 > sKnooVlwsygDEIu2QWYeAJO43GWFMiMtb4sAii52fwbwzLNOA/jF1EDz2zbimBMc > Tcy430CucN7wYQQa8KVU/EdaYXsDRFLPfyvkFw/1GKOm4MzCBNUp3soqMgFCNWix > HwGw82hzMadXqKHwosSoDa291hpboxppYwqohG4rlbLNXZKINTrIYgh4EldI3HGy > YhikuVVODa254DLoj/iS2A7ZWpvDGGqirEMEZEJi9pdO3E5CUctiZFe0zrKk6xX7 > VfQq+wZzN2F6LFVyLEIR238FOKfUdoHP5i4d+2HIzUC1ZTYXLMrmC8aLPnvQLKmO > lS8+EPrFz4LTTvw6Tt5oO0TH51FruLRRfp545yuT/7MOt4pf9jXjvuTrQDVTp+z2 > 6+nZZ5rxv1mAB/d0DvCg3sS3QxnzytmzlE0WVODb9zl0HNVz2GkCAwEAAaOCAV8w > ggFbMAkGA1UdEwQCMAAwHQYDVR0OBBYEFD+YAO8k3NK95IXhPgriJNfICQDuMIGR > BgNVHSMEgYkwgYaAFLcvDVPejjtNaMC39YNvdzbHnbWZoWqkaDBmMQswCQYDVQQG > EwIwMDELMAkGA1UECAwCQ0gxCzAJBgNVBAcMAkRDMRAwDgYDVQQKDAd2dG9sLm1l > MQ8wDQYDVQQLDAZTZXJ2ZXIxGjAYBgNVBAMMEUNBIFNlcnZlciB2dG9sLm1lggIQ > ADAOBgNVHQ8BAf8EBAMCBaAwEwYDVR0lBAwwCgYIKwYBBQUHAwEwEQYIKwYBBQUH > ARgEBTADAgERMEYGA1UdHwQ/MD0wO6A5oDeGNWZpbGU6L2V0Yy9wa2kvdnRvbC5t > ZS9zZXJ2ZXIvaW0vY3JsL2ltX3NlcnZlci5jcmwucGVtMBsGA1UdEQQUMBKHBKwY > bQaCBG1haWyCBGltYXAwCgYIKoZIzj0EAwQDgYkAMIGFAkEAml53KubdaDmaiUXz > ir5NvZmQ8/0B9UbcSKbJq30HJYhx4gotbSYU8LuEYBzAthzHwnQ0FyHV5rZPo4Gp > RBEFkgJAfYk9C3w0urb6KE+e+bFXHketkG+P5aQyUw2kWKI7GikRX2mS5ZbSGNfe > 7Q79jSPczn3gguffxmoSW/idw5BpCw== > -----END CERTIFICATE----- > subject=/C=00/ST=CH/L=DC/O=foo.bar/OU=mail/CN=Server foo.bar Mail IMAP > issuer=/C=00/ST=CH/O=foo.bar/OU=Server/CN=IM Server foo.bar > --- > No client certificate CA names sent > Peer signing digest: SHA512 > Server Temp Key: X25519, 253 bits > --- > SSL handshake has read 2361 bytes and written 295 bytes > Verification error: unable to verify the first certificate > --- > New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384 > Server public key is 4096 bit > Secure Renegotiation IS supported > Compression: NONE > Expansion: NONE > No ALPN negotiated > SSL-Session: > Protocol : TLSv1.2 > Cipher : ECDHE-RSA-AES256-GCM-SHA384 > Session-ID: > 9636556EDC5BA951A6EE3BCAB17BCFAEEE8B380C097EC0C7F20D68BAF2775782 > Session-ID-ctx: > Master-Key: [ obfuscated ] > PSK identity: None > PSK identity hint: None > SRP username: None > Start Time: 1532971172 > Timeout : 7200 (sec) > Verify return code: 21 (unable to verify the first certificate) > Extended master secret: yes > --- > . OK Pre-login capabilities listed, post-login capabilities have more. > >
Missed the public certificate where the csr is generated with an EC private key and the [ no shared cipher ] error: -----BEGIN CERTIFICATE----- MIIDmTCCAv6gAwIBAgICEAEwCgYIKoZIzj0EAwQwWTELMAkGA1UEBhMCMDAxCzAJ BgNVBAgMAkNIMRAwDgYDVQQKDAd2dG9sLm1lMQ8wDQYDVQQLDAZTZXJ2ZXIxGjAY BgNVBAMMEUlNIFNlcnZlciB2dG9sLm1lMB4XDTE4MDcyNTE0NDAxMloXDTE5MDcy NTE0NDAxMlowazELMAkGA1UEBhMCMDAxCzAJBgNVBAgMAkNIMQswCQYDVQQHDAJE QzEQMA4GA1UECgwHdnRvbC5tZTENMAsGA1UECwwEbWFpbDEhMB8GA1UEAwwYU2Vy dmVyIE1haWwgSW1hcCB2dG9sLm1lMIGbMBQGByqGSM49AgEGCSskAwMCCAEBDgOB ggAEdZAqTZhgEaAspsZWe8ss8LC2vxMP9ClHwtjKwVuTAnhJFDX5wWkaukjVw1HW ngwQAI2n9KwyRC3311yWKOQjrkhPw50sbK1UOuypof0fucYzo+B1+YRaae9a2vJx DjljXrvEcXskXdjUFdMIxUAtnHbHuyql8bMJ715ypXADUdGjggFfMIIBWzAJBgNV HRMEAjAAMB0GA1UdDgQWBBROPXTACC4fuaOX5iSNONpuyVAB5jCBkQYDVR0jBIGJ MIGGgBS3Lw1T3o47TWjAt/WDb3c2x521maFqpGgwZjELMAkGA1UEBhMCMDAxCzAJ BgNVBAgMAkNIMQswCQYDVQQHDAJEQzEQMA4GA1UECgwHdnRvbC5tZTEPMA0GA1UE CwwGU2VydmVyMRowGAYDVQQDDBFDQSBTZXJ2ZXIgdnRvbC5tZYICEAAwDgYDVR0P AQH/BAQDAgWgMBMGA1UdJQQMMAoGCCsGAQUFBwMBMBEGCCsGAQUFBwEYBAUwAwIB ETBGBgNVHR8EPzA9MDugOaA3hjVmaWxlOi9ldGMvcGtpL3Z0b2wubWUvc2VydmVy L2ltL2NybC9pbV9zZXJ2ZXIuY3JsLnBlbTAbBgNVHREEFDAShwSsGG0GggRtYWls ggRpbWFwMAoGCCqGSM49BAMEA4GIADCBhAJAdRE8iPNsGMCuwYQjykDeDVngTmO8 YT3tjFh3RrwNEDewPesByTHxhU6E+s98in9cq8rqAGSH8547Cq2KC/BOywJAGNHd SF0PuAzqghQ7JKXqufjxKEyMMEu4H9HlH/h4lwX9hUO5EVDlCNqkcHHu9TCXBCmR xT/8nuAtTycVigK88A== -----END CERTIFICATE-----