openssl s_client -connect pop.gmail.com:995 -showcertsreturns
CONNECTED(00000003) depth=2 C = US, O = GeoTrust Inc., CN = GeoTrust Global CA verify error:num=20:unable to get local issuer certificate verify return:0 --- Certificate chain 0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=pop.gmail.com i:/C=US/O=Google Inc/CN=Google Internet Authority G2 -----BEGIN CERTIFICATE----- MIIEdDCCA1ygAwIBAgIICnqidmpojoAwDQYJKoZIhvcNAQEFBQAwSTELMAkGA1UE BhMCVVMxEzARBgNVBAoTCkdvb2dsZSBJbmMxJTAjBgNVBAMTHEdvb2dsZSBJbnRl cm5ldCBBdXRob3JpdHkgRzIwHhcNMTMwOTEwMDc1NzM5WhcNMTQwOTEwMDc1NzM5 WjBnMQswCQYDVQQGEwJVUzETMBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwN TW91bnRhaW4gVmlldzETMBEGA1UECgwKR29vZ2xlIEluYzEWMBQGA1UEAwwNcG9w LmdtYWlsLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMTnolk6 Aqy4DpU20E++g1VGBVKiypiIpTEytbYmzTkI59gyKuSu8psO1Cto4STQ+0vBZaAa +I71tE1QsUCBTibOubv0g9FQlYhc/3yuC8+0fwqhfgT0Cx81qxuBUP2RLUKkXZ/3 EPauychxFFALnwwRoyuJDE+QdkCgsVJa5d2y34aT3ojhPTAswm1SUsdcU041LkEY UM5kWFlYC5fTd4IQXoBDkzd7p6Danbf5XLVog/GcYqxIBWVhPkbTLqpB5Coil1TD G6K2aLa+ivniQvk7B95K+HRAcXkEcolIgwJ7l+vYatVrZqTlMgL6m6JTG7+AwmZG yvXkHUTMw8vtinMCAwEAAaOCAUAwggE8MB0GA1UdJQQWMBQGCCsGAQUFBwMBBggr BgEFBQcDAjAYBgNVHREEETAPgg1wb3AuZ21haWwuY29tMGgGCCsGAQUFBwEBBFww WjArBggrBgEFBQcwAoYfaHR0cDovL3BraS5nb29nbGUuY29tL0dJQUcyLmNydDAr BggrBgEFBQcwAYYfaHR0cDovL2NsaWVudHMxLmdvb2dsZS5jb20vb2NzcDAdBgNV HQ4EFgQUayhrKRpwxMMZ48nhS2Owk1m2UB8wDAYDVR0TAQH/BAIwADAfBgNVHSME GDAWgBRK3QYWG7z2aLV29YG2u2IaulqBLzAXBgNVHSAEEDAOMAwGCisGAQQB1nkC BQEwMAYDVR0fBCkwJzAloCOgIYYfaHR0cDovL3BraS5nb29nbGUuY29tL0dJQUcy LmNybDANBgkqhkiG9w0BAQUFAAOCAQEAUTIgKAlAHYOFNTPI8+zRWFUZDqpg2nA0 oUprmReIq94DZA9oOG87glHZXfkzcjXb2QPRFqnIZIQFizWUM9JKRvNsmWT/qoB6 pqBWTHOM1x1DUDGdl9V9068H8BuX4gIZSiWwINAJCTcmpr+01dPafO9Fti69j3Oo O64AeRQsYQM9eWcUGE8PlGoHK0SeOWHVXhhA9KOeoGzG9IcpihuXTt1xQFIOiW6I pP1RDJJabLDXB61w8V34w8+B9SfsL9vmpbnsesOkW0Hs4E3tVCXusGhHbUw5Sz0i 3Ut5JUDcUUXsaafv+WSYJjEU4Zq6yCVoHAJ192YZA8LvMwZ3S2U5TQ== -----END CERTIFICATE----- 1 s:/C=US/O=Google Inc/CN=Google Internet Authority G2 i:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA -----BEGIN CERTIFICATE----- MIIEBDCCAuygAwIBAgIDAjppMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i YWwgQ0EwHhcNMTMwNDA1MTUxNTU1WhcNMTUwNDA0MTUxNTU1WjBJMQswCQYDVQQG EwJVUzETMBEGA1UEChMKR29vZ2xlIEluYzElMCMGA1UEAxMcR29vZ2xlIEludGVy bmV0IEF1dGhvcml0eSBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB AJwqBHdc2FCROgajguDYUEi8iT/xGXAaiEZ+4I/F8YnOIe5a/mENtzJEiaB0C1NP VaTOgmKV7utZX8bhBYASxF6UP7xbSDj0U/ck5vuR6RXEz/RTDfRK/J9U3n2+oGtv h8DQUB8oMANA2ghzUWx//zo8pzcGjr1LEQTrfSTe5vn8MXH7lNVg8y5Kr0LSy+rE ahqyzFPdFUuLH8gZYR/Nnag+YyuENWllhMgZxUYi+FOVvuOAShDGKuy6lyARxzmZ EASg8GF6lSWMTlJ14rbtCMoU/M4iarNOz0YDl5cDfsCx3nuvRTPPuj5xt970JSXC DTWJnZ37DhF5iR43xa+OcmkCAwEAAaOB+zCB+DAfBgNVHSMEGDAWgBTAephojYn7 qwVkDBF9qn1luMrMTjAdBgNVHQ4EFgQUSt0GFhu89mi1dvWBtrtiGrpagS8wEgYD VR0TAQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAQYwOgYDVR0fBDMwMTAvoC2g K4YpaHR0cDovL2NybC5nZW90cnVzdC5jb20vY3Jscy9ndGdsb2JhbC5jcmwwPQYI KwYBBQUHAQEEMTAvMC0GCCsGAQUFBzABhiFodHRwOi8vZ3RnbG9iYWwtb2NzcC5n ZW90cnVzdC5jb20wFwYDVR0gBBAwDjAMBgorBgEEAdZ5AgUBMA0GCSqGSIb3DQEB BQUAA4IBAQA21waAESetKhSbOHezI6B1WLuxfoNCunLaHtiONgaX4PCVOzf9G0JY /iLIa704XtE7JW4S615ndkZAkNoUyHgN7ZVm2o6Gb4ChulYylYbc3GrKBIxbf/a/ zG+FA1jDaFETzf3I93k9mTXwVqO94FntT0QJo544evZG0R0SnU++0ED8Vf4GXjza HFa9llF7b1cq26KqltyMdMKVvvBulRP/F/A8rLIQjcxz++iPAsbw+zOzlTvjwsto WHPbqCRiOwY1nQ2pM714A5AuTHhdUDqB1O6gyHA43LL5Z/qHQF1hwFGPa4NrzQU6 yuGnBXj8ytqU0CwIPX4WecigUCAkVDNx -----END CERTIFICATE----- 2 s:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA i:/C=US/O=Equifax/OU=Equifax Secure Certificate Authority -----BEGIN CERTIFICATE----- MIIDfTCCAuagAwIBAgIDErvmMA0GCSqGSIb3DQEBBQUAME4xCzAJBgNVBAYTAlVT MRAwDgYDVQQKEwdFcXVpZmF4MS0wKwYDVQQLEyRFcXVpZmF4IFNlY3VyZSBDZXJ0 aWZpY2F0ZSBBdXRob3JpdHkwHhcNMDIwNTIxMDQwMDAwWhcNMTgwODIxMDQwMDAw WjBCMQswCQYDVQQGEwJVUzEWMBQGA1UEChMNR2VvVHJ1c3QgSW5jLjEbMBkGA1UE AxMSR2VvVHJ1c3QgR2xvYmFsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB CgKCAQEA2swYYzD99BcjGlZ+W988bDjkcbd4kdS8odhM+KhDtgPpTSEHCIjaWC9m OSm9BXiLnTjoBbdqfnGk5sRgprDvgOSJKA+eJdbtg/OtppHHmMlCGDUUna2YRpIu T8rxh0PBFpVXLVDviS2Aelet8u5fa9IAjbkU+BQVNdnARqN7csiRv8lVK83Qlz6c JmTM386DGXHKTubU1XupGc1V3sjs0l44U+VcT4wt/lAjNvxm5suOpDkZALeVAjmR Cw7+OC7RHQWa9k0+bw8HHa8sHo9gOeL6NlMTOdReJivbPagUvTLrGAMoUgRx5asz PeE4uwc2hGKceeoWMPRfwCvocWvk+QIDAQABo4HwMIHtMB8GA1UdIwQYMBaAFEjm aPkr0rKV10fYIyAQTzOYkJ/UMB0GA1UdDgQWBBTAephojYn7qwVkDBF9qn1luMrM TjAPBgNVHRMBAf8EBTADAQH/MA4GA1UdDwEB/wQEAwIBBjA6BgNVHR8EMzAxMC+g LaArhilodHRwOi8vY3JsLmdlb3RydXN0LmNvbS9jcmxzL3NlY3VyZWNhLmNybDBO BgNVHSAERzBFMEMGBFUdIAAwOzA5BggrBgEFBQcCARYtaHR0cHM6Ly93d3cuZ2Vv dHJ1c3QuY29tL3Jlc291cmNlcy9yZXBvc2l0b3J5MA0GCSqGSIb3DQEBBQUAA4GB AHbhEm5OSxYShjAGsoEIz/AIx8dxfmbuwu3UOx//8PDITtZDOLC5MH0Y0FWDomrL NhGc6Ehmo21/uBPUR/6LWlxz/K7ZGzIZOKuXNBSqltLroxwUCEm2u+WR74M26x1W b8ravHNjkOR/ez4iyz0H7V84dJzjA1BOoa+Y7mHyhD8S -----END CERTIFICATE----- --- . . . Start Time: 1383482982 Timeout : 300 (sec) Verify return code: 20 (unable to get local issuer certificate) --- +OK Gpop ready for requests from ....Looks like we need 3 certificates...let's make a directory in our fetchmail folder:
mkdir certs
Then get the root certificates from http://www.geotrust.com/resources/root-certificates/index.html
We need:
- Root 1 - Equifax Secure Certificate Authority
- Root 2 - GeoTrust Global CA
You can download them to your certs folder, or just copy paste the content (e.g. from a browser) in the files. So in the certs folder we will have a file called Equifax_Secure_Certificate_Authority.pem with as content:
-----BEGIN CERTIFICATE----- MIIDIDCCAomgAwIBAgIENd70zzANBgkqhkiG9w0BAQUFADBOMQswCQYDVQQGEwJV UzEQMA4GA1UEChMHRXF1aWZheDEtMCsGA1UECxMkRXF1aWZheCBTZWN1cmUgQ2Vy dGlmaWNhdGUgQXV0aG9yaXR5MB4XDTk4MDgyMjE2NDE1MVoXDTE4MDgyMjE2NDE1 MVowTjELMAkGA1UEBhMCVVMxEDAOBgNVBAoTB0VxdWlmYXgxLTArBgNVBAsTJEVx dWlmYXggU2VjdXJlIENlcnRpZmljYXRlIEF1dGhvcml0eTCBnzANBgkqhkiG9w0B AQEFAAOBjQAwgYkCgYEAwV2xWGcIYu6gmi0fCG2RFGiYCh7+2gRvE4RiIcPRfM6f BeC4AfBONOziipUEZKzxa1NfBbPLZ4C/QgKO/t0BCezhABRP/PvwDN1Dulsr4R+A cJkVV5MW8Q+XarfCaCMczE1ZMKxRHjuvK9buY0V7xdlfUNLjUA86iOe/FP3gx7kC AwEAAaOCAQkwggEFMHAGA1UdHwRpMGcwZaBjoGGkXzBdMQswCQYDVQQGEwJVUzEQ MA4GA1UEChMHRXF1aWZheDEtMCsGA1UECxMkRXF1aWZheCBTZWN1cmUgQ2VydGlm aWNhdGUgQXV0aG9yaXR5MQ0wCwYDVQQDEwRDUkwxMBoGA1UdEAQTMBGBDzIwMTgw ODIyMTY0MTUxWjALBgNVHQ8EBAMCAQYwHwYDVR0jBBgwFoAUSOZo+SvSspXXR9gj IBBPM5iQn9QwHQYDVR0OBBYEFEjmaPkr0rKV10fYIyAQTzOYkJ/UMAwGA1UdEwQF MAMBAf8wGgYJKoZIhvZ9B0EABA0wCxsFVjMuMGMDAgbAMA0GCSqGSIb3DQEBBQUA A4GBAFjOKer89961zgK5F7WF0bnj4JXMJTENAKaSbn+2kmOeUJXRmm/kEd5jhW6Y 7qj/WsjTVbJmcVfewCHrPSqnI0kBBIZCe/zuf6IWUrVnZ9NA2zsmWLIodz2uFHdh 1voqZiegDfqnc1zqcPGUIWVEX/r87yloqaKHee9570+sB3c4 -----END CERTIFICATE-----
Do the same for the GeoTrust_Global_CA.pem file.
Finally create a pop.gmail.com.pem with as content:
-----BEGIN CERTIFICATE----- MIIDIDCCAomgAwIBAgIENd70zzANBgkqhkiG9w0BAQUFADBOMQswCQYDVQQGEwJV UzEQMA4GA1UEChMHRXF1aWZheDEtMCsGA1UECxMkRXF1aWZheCBTZWN1cmUgQ2Vy dGlmaWNhdGUgQXV0aG9yaXR5MB4XDTk4MDgyMjE2NDE1MVoXDTE4MDgyMjE2NDE1 MVowTjELMAkGA1UEBhMCVVMxEDAOBgNVBAoTB0VxdWlmYXgxLTArBgNVBAsTJEVx dWlmYXggU2VjdXJlIENlcnRpZmljYXRlIEF1dGhvcml0eTCBnzANBgkqhkiG9w0B AQEFAAOBjQAwgYkCgYEAwV2xWGcIYu6gmi0fCG2RFGiYCh7+2gRvE4RiIcPRfM6f BeC4AfBONOziipUEZKzxa1NfBbPLZ4C/QgKO/t0BCezhABRP/PvwDN1Dulsr4R+A cJkVV5MW8Q+XarfCaCMczE1ZMKxRHjuvK9buY0V7xdlfUNLjUA86iOe/FP3gx7kC AwEAAaOCAQkwggEFMHAGA1UdHwRpMGcwZaBjoGGkXzBdMQswCQYDVQQGEwJVUzEQ MA4GA1UEChMHRXF1aWZheDEtMCsGA1UECxMkRXF1aWZheCBTZWN1cmUgQ2VydGlm aWNhdGUgQXV0aG9yaXR5MQ0wCwYDVQQDEwRDUkwxMBoGA1UdEAQTMBGBDzIwMTgw ODIyMTY0MTUxWjALBgNVHQ8EBAMCAQYwHwYDVR0jBBgwFoAUSOZo+SvSspXXR9gj IBBPM5iQn9QwHQYDVR0OBBYEFEjmaPkr0rKV10fYIyAQTzOYkJ/UMAwGA1UdEwQF MAMBAf8wGgYJKoZIhvZ9B0EABA0wCxsFVjMuMGMDAgbAMA0GCSqGSIb3DQEBBQUA A4GBAFjOKer89961zgK5F7WF0bnj4JXMJTENAKaSbn+2kmOeUJXRmm/kEd5jhW6Y 7qj/WsjTVbJmcVfewCHrPSqnI0kBBIZCe/zuf6IWUrVnZ9NA2zsmWLIodz2uFHdh 1voqZiegDfqnc1zqcPGUIWVEX/r87yloqaKHee9570+sB3c4 -----END CERTIFICATE-----
Then it is time to make the hashes. I have seen typically there is a c_rehash command, but I don't find it for Linino/OpenWrt. we can do this manually:
openssl x509 -hash -noout -in pop.gmail.com.pemThis returns a number (09cc127e). Make a link using this number (adding .0):
ln -s pop.gmail.com.pem 09cc127e.0Do the same for the other 2. Now add to the fetchmailrc file the location of our certs:
sslcertpath /mnt/sda1/arduino/fetchmail/certs/
If we now run fetchmail -vk we get something like:
fetchmail: WARNING: Running as root is discouraged. fetchmail: 6.3.26 querying pop.gmail.com (protocol POP3) at Sun, 03 Nov 2013 16:52:40 +0100 (CET): poll started Trying to connect to 173.194.70.108/995...connected. fetchmail: Server certificate: fetchmail: Issuer Organization: Google Inc fetchmail: Issuer CommonName: Google Internet Authority G2 fetchmail: Subject CommonName: pop.gmail.com fetchmail: Subject Alternative Name: pop.gmail.com fetchmail: pop.gmail.com key fingerprint: 91:63:CF:6F:DF:03:3C:B9:3E:19:3B:1C:B6:EB:3C:25 fetchmail: POP3< +OK Gpop ready for requests from 91.179.156.171 n2pf31788823eef.22 fetchmail: POP3> CAPA fetchmail: POP3< +OK Capability list follows fetchmail: POP3< USER fetchmail: POP3< RESP-CODES fetchmail: POP3< EXPIRE 0 fetchmail: POP3< LOGIN-DELAY 300 fetchmail: POP3< TOP fetchmail: POP3< UIDL fetchmail: POP3< X-GOOGLE-VERHOEVEN fetchmail: POP3< X-GOOGLE-RICO fetchmail: POP3< . fetchmail: POP3> USER xxxxxx fetchmail: POP3< +OK send PASS fetchmail: POP3> PASS * fetchmail: POP3< +OK Welcome. fetchmail: POP3> STAT fetchmail: POP3< +OK 0 0 fetchmail: No mail for xxxxxxxx at pop.gmail.com fetchmail: POP3> QUIT fetchmail: POP3< +OK Farewell. fetchmail: 6.3.26 querying pop.gmail.com (protocol POP3) at Sun, 03 Nov 2013 16:52:41 +0100 (CET): poll completed fetchmail: normal termination, status 1
In this case there was no mail (status 1).
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