sslutils: use chain from client certificates

sslutils used to load only the first certificate when it was given a
client certificate file.

Added tests for check_http to connect to a http server that expects a
client certificate (simple and with chain).

Signed-off-by: Tobias Wiese <tobias@tobiaswiese.com>

18 files changed, 538 insertions, 204 deletions

diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 14f6579..286273f 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -134,7 +134,7 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
                 return STATE_CRITICAL;
         }
         if (cert && privkey) {
-                SSL_CTX_use_certificate_file(c, cert, SSL_FILETYPE_PEM);
+                SSL_CTX_use_certificate_chain_file(c, cert);
                 SSL_CTX_use_PrivateKey_file(c, privkey, SSL_FILETYPE_PEM);
 #ifdef USE_OPENSSL
                 if (!SSL_CTX_check_private_key(c)) {
diff --git a/plugins/tests/certs/.gitignore b/plugins/tests/certs/.gitignore
new file mode 100644
index 0000000..79acaaa
--- /dev/null
+++ b/plugins/tests/certs/.gitignore
@@ -0,0 +1,2 @@
+/*.csr
+/*.srl
diff --git a/plugins/tests/certs/client-cert.pem b/plugins/tests/certs/client-cert.pem
new file mode 100644
index 0000000..5709750
--- /dev/null
+++ b/plugins/tests/certs/client-cert.pem
@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/plugins/tests/certs/client-key.pem b/plugins/tests/certs/client-key.pem
new file mode 100644
index 0000000..09b6761
--- /dev/null
+++ b/plugins/tests/certs/client-key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/plugins/tests/certs/clientca-cert.pem b/plugins/tests/certs/clientca-cert.pem
new file mode 100644
index 0000000..9ce7cd7
--- /dev/null
+++ b/plugins/tests/certs/clientca-cert.pem
@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/plugins/tests/certs/clientca-key.pem b/plugins/tests/certs/clientca-key.pem
new file mode 100644
index 0000000..a939f03
--- /dev/null
+++ b/plugins/tests/certs/clientca-key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/plugins/tests/certs/clientchain-cert.pem b/plugins/tests/certs/clientchain-cert.pem
new file mode 100644
index 0000000..acd1e3e
--- /dev/null
+++ b/plugins/tests/certs/clientchain-cert.pem
@@ -0,0 +1,45 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/plugins/tests/certs/clientchain-key.pem b/plugins/tests/certs/clientchain-key.pem
new file mode 100644
index 0000000..0263604
--- /dev/null
+++ b/plugins/tests/certs/clientchain-key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/plugins/tests/certs/clientintermediate-cert.pem b/plugins/tests/certs/clientintermediate-cert.pem
new file mode 100644
index 0000000..608a8fa
--- /dev/null
+++ b/plugins/tests/certs/clientintermediate-cert.pem
@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/plugins/tests/certs/clientintermediate-key.pem b/plugins/tests/certs/clientintermediate-key.pem
new file mode 100644
index 0000000..13f6887
--- /dev/null
+++ b/plugins/tests/certs/clientintermediate-key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDqtSA5n2kA7Gty
+B545PdWa7ViZjY78L21eGkrMPONNpZTNx0ODTQp2yNd+BsPNKJW68zONfrdoqmap
+4Ub7TkPZXNAaK3eSep6tSCXXQWdOi2IkYXkJTn+BjVo/FMnuuPa0Posg0GQlw9PJ
+DgyglPX2myy8JrH16tjVHGhfEtuUn7fUL5W+t+12YE/idUpcrbrhqdvWhRCGSCle
+kmKYkGYX6/s1sOzVaHbUF7zQpdSH1IqB4+FJBuWvZCVFwDuMuAng8yNn4pgX51r7
+hEHuz4O9NdUMyf0AvzgTXDlS3UTxdlX67hGNY+812Er/sae7E5EL1J3GieqQ9DyG
+Iju2E/1tAgMBAAECggEACyYJXtNUoIeaXvM/r8ZhJBfMEpcnyJDUKBklnmfyABky
+ZUfmzBDXw2as3b6ihFc+LYAp3bm8KouVjtI1lfBUxrli5StVZa7PZLm9mmjv6Eo0
+ojfDEQ8afWPieoaZRO6iQVOLNkbPyv9vSuiQ7vvEZy9dw54u69h47j6IMqPprDiG
+ropUNeGAvTnh1Vf9/8aCHEvHUNHcc4zjzGiQ+E60JgnbpGVeJKoeiMgrQE0yjweo
+KyKA47Y6vqP6+AxAaPplXtmrx2UCbMjktHNvLvg42+2UlLS5roiwmJYEN9c6iT6t
+y82MJrjEFGZyLG2u6ZQANSJiIWaCnOyT1o2deJ8NoQKBgQD7UxivDTuljQD0so+E
+JX9UaFZ9PgS+8LC9v56PciL4XQ7bcCVP5vVgZZPABiQ9i989Wq7qI042Jrfu5qtE
+SthlOAu80GvAQV+Oujwo7ZzM6ciQtjMsj63r2uayWXnmQ07QcIg7x7y161Pt9Bqr
+LIDrqHziIj/lzT7+6QKZaQwFaQKBgQDvEuSC14CBlMhy2jji71kB/3Ya3c+8dP+A
+kQZL9wEWK4a4dm8IaTS8jl1/luhQUzFRMyh2rWaTqqigSe3dvs5DRblhE5NPwTSI
+9TO7t1EnzjW3R8LxZZsySyiSFnZ/8mR0empxq0Mov37OdXBj0tXuuzREf/hwijWh
+WuLxJUSjZQKBgAIDZ2Y3l+u6lnBfYdDwL/XwJAk6zvTsnq3WdCG4C1mr/St62YGr
+WvnbtnRKWE356d7m9BHCGKVMaBrM1EBmzRb6fPWVQde3blmJWmQFi0UE9mtaWkyY
+Fg+WoFR7bQOQNHhs/lpkPjnC2dhFJVWLtLiuj9mL5rEjlMab/T5XXhZJAoGBAMEP
+FZ8fXbPGrTQqSwPfWpZFcF9zvbynEmkFM/uGRMddcNZnNXSqWJ7nrFNLTuEGvW2g
+DU4A6zPV/YQrDz4hRjmHBZOCFlSyZbUvpY4yFAQ7/p66AY+kiHZNwT5vi1P5Luvs
+qyaNsZcnRMR+i7rg2EeHv0aNvNdMlNBvL5KikNINAoGAU2P/phdwJOUcqgHavQcQ
+ureTEyZ5i5AeNomNeHSj0slG24V9nxOqEL7D00JKln7oAPovYBUWocEnF39uBJe0
+p0Hy7fCCK6EI8/0QyiQuuZmJfDEEvjQqE6irONNH63r2UwDEpDNGFvGsZNuWHLZc
+SXADu5oSNu6o6IydiyOx528=
+-----END PRIVATE KEY-----
diff --git a/plugins/tests/certs/expired-cert.pem b/plugins/tests/certs/expired-cert.pem
index 77a9166..87fc8e4 100644
--- a/plugins/tests/certs/expired-cert.pem
+++ b/plugins/tests/certs/expired-cert.pem
@@ -1,24 +1,24 @@
 -----BEGIN CERTIFICATE-----
-MIIEETCCAvmgAwIBAgIUFDsP6WnV/uqeQMpD/DYSqouE13kwDQYJKoZIhvcNAQEL
+MIIEETCCAvmgAwIBAgIUVDKkhcUoYFnjYCw12tScPIqQzqIwDQYJKoZIhvcNAQEL
 BQAwgZcxCzAJBgNVBAYTAkRFMRAwDgYDVQQIDAdCYXZhcmlhMQ8wDQYDVQQHDAZN
 dW5pY2gxGzAZBgNVBAoMEk1vbml0b3JpbmcgUGx1Z2luczEbMBkGA1UEAwwSTW9u
 aXRvcmluZyBQbHVnaW5zMSswKQYJKoZIhvcNAQkBFhxkZXZlbEBtb25pdG9yaW5n
-LXBsdWdpbnMub3JnMB4XDTA4MDEwMTExMDAyNloXDTA4MDEwMjExMDAyNlowgZcx
+LXBsdWdpbnMub3JnMB4XDTA4MDEwMTEyMDAwMFoXDTA4MDEwMjEyMDAwMFowgZcx
 CzAJBgNVBAYTAkRFMRAwDgYDVQQIDAdCYXZhcmlhMQ8wDQYDVQQHDAZNdW5pY2gx
 GzAZBgNVBAoMEk1vbml0b3JpbmcgUGx1Z2luczEbMBkGA1UEAwwSTW9uaXRvcmlu
 ZyBQbHVnaW5zMSswKQYJKoZIhvcNAQkBFhxkZXZlbEBtb25pdG9yaW5nLXBsdWdp
-bnMub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyeHKwKFjJWUX
-YHKsisypUf9dHlIPQAISyGP1BX6UL26ZLvE6kKbx3LFQ9W2POGoQWlzFiB1soGeV
-WDd0U0JtWdCKmOXWdcXpupQlTSUtRCMDQkfqLN8GR5TBTd73rezp5mz08nMfLwu0
-p5VQ191Ui8JHFgrAOalAn8Uw5De8vj4VmTXmU5NJ2UFoC0ddU/Th/lwRCayHc1cn
-MVq2F7c/uhMUUQYNBmJy0pxoHawp+j9NKl/xIYsjgQNgahQyNuswuGHjaEwhPu+7
-G03XsW4ehu+H1898M/MkSln6LQAU1syoJ8ypPM8tV+zgx4uwj7udnZ2hceN95uW7
-0PWg5DQyUwIDAQABo1MwUTAdBgNVHQ4EFgQUt9ps3KJ1XiMuy/ijFBjMzf6jgwkw
-HwYDVR0jBBgwFoAUt9ps3KJ1XiMuy/ijFBjMzf6jgwkwDwYDVR0TAQH/BAUwAwEB
-/zANBgkqhkiG9w0BAQsFAAOCAQEAVPBZwMHbrnHFbmhbcPuvYd5cxk0uSVNAUzsl
-2biCq5P+ZHo10VHGygXtdV4utqk/IrAt2u5qSxycWPStCtAgTd3Q8ncfjOkaHM4z
-2bxTkhLyQeU8NWPuDBqDszo2GOaFTv+lm36LEKiAfqB1tjQVePSkycdrWIhkamBV
-EgMe6uHLdU7QQk1ajQfrBdakN1beqki/dKieA6gm+XF/QS4SSYINmsHB/2X5cT9U
-b/KMB8xurCnuJQuk1P4VsSkJCOSeHjWZgK9pKNdsIJZr4wDVfhjQgU0XT6xakSf7
-eCaHtO0VKsbLZoiTmpxidjsdYiXyeKYIQNtUpTjyJ5V/cZsq9w==
+bnMub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwg1dmGT3rVqM
+beVWWLy8EAiq9re07AF8sTERy9oIYF5EUq9f0xO53mwwqIWV77O9mF99/kDFGQuQ
+NOnICMSHXNtMXEXzfBaMighw0uyCh1o/VCejNQ5x/HU8aLh930g5DIcOJQ3fZ4v9
+8kBaie7+aPgRMVDM1vIrILfedq9Kt56zvPizkXhDeqxjKyIZdrdoBlX5zAfftWtY
+HpQ+lkThSSXqQnchN6S2JFejmRtsNnceDVOBBdvlzmH0NlfwjynLK3/EJooTsINy
+i9dXD8/Oe8r+UA+nokWvnWC2IAUJjpxW+XAyTG/NofGwX+PwquT0YD5cSlODIwZA
+WAimygWLqQIDAQABo1MwUTAdBgNVHQ4EFgQUsKyJAwR9OXWEcSZMQz73GfpxCJIw
+HwYDVR0jBBgwFoAUsKyJAwR9OXWEcSZMQz73GfpxCJIwDwYDVR0TAQH/BAUwAwEB
+/zANBgkqhkiG9w0BAQsFAAOCAQEAYKFGX7J3Fc/T9s278w61E2dSsY4DS/mjSDik
+fMWvod6eKw0fE3wJOnkWxjEH3VywTY6CmHd/oiJOaD8lr/Vk+BJfYNVBaVNmguyg
+4LXoWz9Benx0bAIeuDbNAhOvA4H4aIz8UrD9lKFvKdRp42gPMLtMEbzbLcBdT95D
+6BX7EhYm7vTnpitLPgFxVCsJ1JFqv2AQfUm+IkqQkezPs5x0tWLyrvCDNRGJ0kfv
+UuowpUZXDOh3k1vB+xaSOFviieLaCW8TSdd5FZgI2HQj4e6vCKsMGuKKZXrMUTI/
+qtrFlUfsOuwourfC5LMHtCyYo5B3uvAWT1eTXxhrGqyleSlxJQ==
 -----END CERTIFICATE-----
diff --git a/plugins/tests/certs/expired-key.pem b/plugins/tests/certs/expired-key.pem
index c1510b2..c5bba56 100644
--- a/plugins/tests/certs/expired-key.pem
+++ b/plugins/tests/certs/expired-key.pem
@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDJ4crAoWMlZRdg
-cqyKzKlR/10eUg9AAhLIY/UFfpQvbpku8TqQpvHcsVD1bY84ahBaXMWIHWygZ5VY
-N3RTQm1Z0IqY5dZ1xem6lCVNJS1EIwNCR+os3wZHlMFN3vet7OnmbPTycx8vC7Sn
-lVDX3VSLwkcWCsA5qUCfxTDkN7y+PhWZNeZTk0nZQWgLR11T9OH+XBEJrIdzVycx
-WrYXtz+6ExRRBg0GYnLSnGgdrCn6P00qX/EhiyOBA2BqFDI26zC4YeNoTCE+77sb
-Tdexbh6G74fXz3wz8yRKWfotABTWzKgnzKk8zy1X7ODHi7CPu52dnaFx433m5bvQ
-9aDkNDJTAgMBAAECggEACrLFfNnQmD24NGs/S4e2/VpsA9xTZI/3kNkDNgxULANP
-aNZtxRajwI9A/BCXQ2UTgsZhzWnJxOJYXrlpl7PweY78mUesysb3MOUC6QisUm0M
-kimfdktHWOnAKLFFLNleN9DUVjjVkTeslijqhNX80f80py1grG2UuCLKCX4OqYIm
-qACE8TMmSZLz42AO96TndNtKplQ8LuGLEmByW95wEfhx3Gm4ckkL7qII/U3DnQXr
-0T+3xLaj+eNJzYDpIFZiw4sNzOuAyCz+4Cc4sPDuMnzquXF+enpkemoycC1RmEpG
-KIDTwmFsc8TrbGV0qifC6fsCrDivdYLqL7R/q3IBQQKBgQDmfvO3VYTEKY8NA+AT
-5s6+7NTxRsXxJUCEhCNBWimSH3EzmBAvrodLY6A0oYg8i81bgNX1I9GPVXJZ/QA7
-ukd84HUIQoGS5Usmo4rp+kz4P6KkLXDemZtWPU5GXxicfajHRQlkbW6St6SpV7IS
-ibJcDADeoiaPL1xvue1ToP/LoQKBgQDgOFHjYpep00gabvjXfYW7vhrg1vVwaKUM
-rf0+UW8Exk4nbBw0eEC2YjxIwzdktlkdbzGaXYULnhg8GnfxYesMOpCLPw1JdB8o
-ixETAFpW5bKrUsjEFRUGhzWnsCSFIQ4smpmtGLTxOQ8AkoDdORY5Z+Wv7JtFF6Do
-PSoblckZcwKBgB3TD3YJesRnHDty5OuuUdIikuslXTd2uoJrFqS+JeLibqNeabnB
-u3/lxDULMbWj4U6VvRmbKOKDC+jY887Gq7lc0cff0yROxwqY3sCnwo3crg7QUmp7
-Nb5S8G3qoCSfndcq96wm/Me/O28uCbycVJfUdchY8uRUHIHYbP0FOBQBAoGBAMgh
-fPX4imaKr1DovDObVkK87EDDnU84GBm5MtDs3qrkVd3aIVK0Aw7HoAdSN58tI12i
-YiPmVVqJQhhjh6tsOuAvZdTj8ngdrbICbrsHFZt6an+A5LIgHyQ0iy+hiPdLCdvG
-ImTeKKMmyr04Bs1upueWVO0xw2VoMbcY4Py+NUEBAoGASQqedfCSKGLT+5lLZrhP
-CbFVMmswEPjBcRb1trcuA09vfExn9FfUNFnnw3i9miprED5kufvAjb+6nduXizKg
-7HQYHCwVvakgtXgbiDMaNgYZcjWm+MdnfiwLJjJTO3DfI1JF2PJ8y9R95DPlAkDm
-xH3OV8KV4UiTEVxS7ksmGzY=
+MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDCDV2YZPetWoxt
+5VZYvLwQCKr2t7TsAXyxMRHL2ghgXkRSr1/TE7nebDCohZXvs72YX33+QMUZC5A0
+6cgIxIdc20xcRfN8FoyKCHDS7IKHWj9UJ6M1DnH8dTxouH3fSDkMhw4lDd9ni/3y
+QFqJ7v5o+BExUMzW8isgt952r0q3nrO8+LOReEN6rGMrIhl2t2gGVfnMB9+1a1ge
+lD6WROFJJepCdyE3pLYkV6OZG2w2dx4NU4EF2+XOYfQ2V/CPKcsrf8QmihOwg3KL
+11cPz857yv5QD6eiRa+dYLYgBQmOnFb5cDJMb82h8bBf4/Cq5PRgPlxKU4MjBkBY
+CKbKBYupAgMBAAECggEBAJ2mdCKJ7LoWdT4W8pZ3BqZUFGkKCF8wOhhOUDH3+ZQp
+IYK3XbdDMF7mMIXIuW4a7W4sLlTwU/Ar98U1JMESwRIMS7YvUke+ngDKKLcDVGwY
+Qpjg9vP0v2Al8qT1NbW/nDF0S2aJJbWfAvnblHK5ClFHL9iL107NQYJ8PqzXbnFL
+gCQRiZxVHlrbn/73ZUMHPGEoU0711U9hSjrsqrRuSAMC+V38s4HxOomZWutlVAHF
+HwClNZBqRO+a2njPyUuV9DM/rl5Tm9IQ89iFo3/QEORICK77HjJYhi+UzdfI5F35
+UntRJt+WLaiAP+K6Vt6oxHSm58qXnOkeLzaAunTTie0CgYEA6OLYfme8xe5zYXWX
+rqmKNYdcVfMkvL+vUfVT475o/piRtE54JC1LYWEFAN8paxEWHD5HZMy0+ONNXfGm
+zyNNTN/Lagz4WcpdFzKQmhfdro7DzRiDfdvwSLmaZDyE41PPPVVvfrI9IeDiUNY4
+nWLSb3sWo96Iuns+RoMqeA9wkqsCgYEA1U/UqeVQVTPlrWyiB2VXoI1xvFCCJTf8
+4NC0gcisxLRrtINk0BwrUJrRy0x1OLpJWiKwUl/W1GgvPPfhbYcUOb669JNtTIjY
+FeIZblCTjz9GzKKmXeDciXvccyEdCJVUlPO3/e2JiJ4mCDjULprifq0a2gcQevFS
+PfqVULhBOvsCgYB5KfS7J1vGmv36ucSWAe0/VlKLATqe3RfpCzt/JQTZWSWNaroF
+EG/ElUaWIoUZCEW5oglg/0Q0rYYGF4DTCingkhrx7ReVF70BIbSsBzi15d8nKNbY
+t4I3RCF4fyggYe1TmsysXS2DH85/gkToVY7oo2CvF0uJwi8vXnTNDDNkiwKBgHKs
+mAc94BHt9GtnGzQepx0I7TvvjAe2MZwqlt+uojKdS8mfWXMHscGDeYVxdRMqEoUC
+YQfnvfYyjDKaj/XxyE3C237gQsICTyh0hHdpmepIeidIyWdumyDOFZVPF+ylWvM4
+kpFQQb/QRWHmKyti2KCBLw5G/fUaBryLGfprE6ZBAoGBANy5rr41A679UQZ0abev
+bOZb7YWOHYp/wReJaQbvLAyR30os3aEY/0ht9S+OWdrgGMezPKvsx2Sqr/CwoFXI
+esiklpknr11maEPxnQJYi4FYiXS1a3NCg7yBvKzFEgx2XnMAC3s6zhuZXaFq4zNu
+pm5Btrq/NZqtVXovS+UhGLvJ
 -----END PRIVATE KEY-----
diff --git a/plugins/tests/certs/ext.cnf b/plugins/tests/certs/ext.cnf
new file mode 100644
index 0000000..d09cee1
--- /dev/null
+++ b/plugins/tests/certs/ext.cnf
@@ -0,0 +1,2 @@
+[ client_ca ]
+basicConstraints = critical, CA:true
diff --git a/plugins/tests/certs/generate-certs.sh b/plugins/tests/certs/generate-certs.sh
new file mode 100755
index 0000000..78660a2
--- /dev/null
+++ b/plugins/tests/certs/generate-certs.sh
@@ -0,0 +1,63 @@
+#!/bin/sh -e
+#
+# Recreates the https server certificates
+#
+# Set the GEN_EXPIRED environment variable to also regenerate
+# the expired certificate.
+
+cd "$(dirname "$0")"
+trap 'rm -f *.csr; rm -f clientca-cert.srl' EXIT
+
+subj() {
+        c="DE"
+        st="Bavaria"
+        l="Munich"
+        o="Monitoring Plugins"
+        cn="Monitoring Plugins"
+        emailAddress="devel@monitoring-plugins.org"
+
+        if [ -n "$1" ]; then
+                # Add to CN
+                cn="$cn $1"
+        fi
+
+        printf "/C=%s/ST=%s/L=%s/O=%s/CN=%s/emailAddress=%s" \
+                "$c" "$st" "$l" "$o" "$cn" "$emailAddress"
+}
+
+# server
+openssl req -new -x509 -days 3560 -nodes \
+        -keyout server-key.pem -out server-cert.pem \
+        -subj "$(subj)"
+# server, expired
+# there is generally no need to regenerate this, as it will stay epxired
+[ -n "$GEN_EXPIRED" ] && TZ=UTC faketime -f '2008-01-01 12:00:00' \
+        openssl req -new -x509 -days 1 -nodes \
+                -keyout expired-key.pem -out expired-cert.pem \
+                -subj "$(subj)"
+
+# client, ca
+openssl req -new -x509 -days 3560 -nodes \
+        -keyout clientca-key.pem -out clientca-cert.pem \
+        -subj "$(subj ClientCA)"
+echo "01" >clientca-cert.srl
+# client
+openssl req -new -nodes \
+        -keyout client-key.pem -out client-cert.csr \
+        -subj "$(subj Client)"
+openssl x509 -days 3560 -req -CA clientca-cert.pem -CAkey clientca-key.pem \
+        -in client-cert.csr -out client-cert.pem
+# client, intermediate
+openssl req -new -nodes \
+        -keyout clientintermediate-key.pem -out clientintermediate-cert.csr \
+        -subj "$(subj ClientIntermediate)"
+openssl x509 -days 3560 -req -CA clientca-cert.pem -CAkey clientca-key.pem \
+        -extfile ext.cnf -extensions client_ca \
+        -in clientintermediate-cert.csr -out clientintermediate-cert.pem
+# client, chain
+openssl req -new -nodes \
+        -keyout clientchain-key.pem -out clientchain-cert.csr \
+        -subj "$(subj ClientChain)"
+openssl x509 -days 3560 -req -CA clientca-cert.pem -CAkey clientca-key.pem \
+        -in clientchain-cert.csr -out clientchain-cert.pem
+cat clientintermediate-cert.pem >>clientchain-cert.pem
diff --git a/plugins/tests/certs/server-cert.pem b/plugins/tests/certs/server-cert.pem
index b84b91d..d1249ef 100644
--- a/plugins/tests/certs/server-cert.pem
+++ b/plugins/tests/certs/server-cert.pem
@@ -1,24 +1,24 @@
 -----BEGIN CERTIFICATE-----
-MIIEBjCCAu6gAwIBAgIJANbQ5QQrKhUGMA0GCSqGSIb3DQEBCwUAMIGXMQswCQYD
-VQQGEwJERTEQMA4GA1UECAwHQmF2YXJpYTEPMA0GA1UEBwwGTXVuaWNoMRswGQYD
-VQQKDBJNb25pdG9yaW5nIFBsdWdpbnMxGzAZBgNVBAMMEk1vbml0b3JpbmcgUGx1
-Z2luczErMCkGCSqGSIb3DQEJARYcZGV2ZWxAbW9uaXRvcmluZy1wbHVnaW5zLm9y
-ZzAeFw0xOTAyMTkxNTMxNDRaFw0yOTAyMTYxNTMxNDRaMIGXMQswCQYDVQQGEwJE
-RTEQMA4GA1UECAwHQmF2YXJpYTEPMA0GA1UEBwwGTXVuaWNoMRswGQYDVQQKDBJN
-b25pdG9yaW5nIFBsdWdpbnMxGzAZBgNVBAMMEk1vbml0b3JpbmcgUGx1Z2luczEr
-MCkGCSqGSIb3DQEJARYcZGV2ZWxAbW9uaXRvcmluZy1wbHVnaW5zLm9yZzCCASIw
-DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKgV2yp8pQvJuN+aJGdAe6Hd0tja
-uteCPcNIcM92WLOF69TLTSYon1XDon4tHTh4Z5d4lD8bfsGzFVBmDSgWidhAUf+v
-EqEXwbp293ej/Frc0pXCvmrz6kI1tWrLtQhL/VdbxFYxhV7JjKb+PY3SxGFpSLPe
-PQ/5SwVndv7rZIwcjseL22K5Uy2TIrkgzzm2pRs/IvoxRybYr/+LGoHyrtJC6AO8
-ylp8A/etL0gwtUvRnrnZeTQ2pA1uZ5QN3anTL8JP/ZRZYNegIkaawqMtTKbhM6pi
-u3/4a3Uppvt0y7vmGfQlYejxCpICnMrvHMpw8L58zv/98AbCGjDU3UwCt6MCAwEA
-AaNTMFEwHQYDVR0OBBYEFG/UH6nGYPlVcM75UXzXBF5GZyrcMB8GA1UdIwQYMBaA
-FG/UH6nGYPlVcM75UXzXBF5GZyrcMA8GA1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcN
-AQELBQADggEBAGwitJPOnlIKLndNf+iCLMIs0dxsl8kAaejFcjoT0n4ja7Y6Zrqz
-VSIidzz9vQWvy24xKJpAOdj/iLRHCUOG+Pf5fA6+/FiuqXr6gE2/lm0eC58BNONr
-E5OzjQ/VoQ8RX4hDntgu6FYbaVa/vhwn16igt9qmdNGGZXf2/+DM3JADwyaA4EK8
-vm7KdofX9zkxXecHPNvf3jiVLPiDDt6tkGpHPEsyP/yc+RUdltUeZvHfliV0cCuC
-jJX+Fm9ysjSpHIFFr+jUMuMHibWoOD8iy3eYxfCDoWsH488pCbj8MNuAq6vd6DBk
-bOZxDz43vjWuYMkwXJTxJQh7Pne6kK0vE1g=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 -----END CERTIFICATE-----
diff --git a/plugins/tests/certs/server-key.pem b/plugins/tests/certs/server-key.pem
index 1194755..0de63f8 100644
--- a/plugins/tests/certs/server-key.pem
+++ b/plugins/tests/certs/server-key.pem
@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCoFdsqfKULybjf
-miRnQHuh3dLY2rrXgj3DSHDPdlizhevUy00mKJ9Vw6J+LR04eGeXeJQ/G37BsxVQ
-Zg0oFonYQFH/rxKhF8G6dvd3o/xa3NKVwr5q8+pCNbVqy7UIS/1XW8RWMYVeyYym
-/j2N0sRhaUiz3j0P+UsFZ3b+62SMHI7Hi9tiuVMtkyK5IM85tqUbPyL6MUcm2K//
-ixqB8q7SQugDvMpafAP3rS9IMLVL0Z652Xk0NqQNbmeUDd2p0y/CT/2UWWDXoCJG
-msKjLUym4TOqYrt/+Gt1Kab7dMu75hn0JWHo8QqSApzK7xzKcPC+fM7//fAGwhow
-1N1MArejAgMBAAECggEANuvdTwanTzC8jaNqHaq+OuemS2E9B8nwsGxtH/zFgvNR
-WZiMPtmrJnTkFWJcV+VPw/iMSAqN4nDHmBugVOb4Z4asxGTKK4T9shXJSnh0rqPU
-00ZsvbmxY6z0+E5TesCJqQ+9GYTY1V357V7JchvaOxIRxWPqg9urHbru8OCtW/I5
-Fh5HPUZlgCvlMpjlhyjydIf/oXyVA3RNsXlwe8+2cKuGIrjEzm2j9o3VF0sctTX0
-ItP8A9qDmDQN7GIWX0MW6gncojpS1omC2wcFsdjj/xfPyiDal1X4aq/2YqG8351c
-YlM/+6Va0u9WWE/i64gASTAVqpMV4Yg8y0gGycuA0QKBgQDbgI2QeLd3FvMcURiU
-l3w9qJgw/Jp3jaNC/9LkVGGz4f4lKKB67lPZvI4noMK8GqO/LcXgqP/RY1oJojoA
-/6JKVvzYGASZ7VgMoG9bk1AneP1PGdibuTUEwimGlcObxnDFIC/yjwPFu3jIdqdS
-zZi1RZzyqAogN5y3SBEypSmn9wKBgQDECKsqqlcizmCl8v5aVk875AzGN+DOHZqx
-bkmztlnLO/2e2Fmk3G5Vvnui0FYisf8Eq19tUTQCF6lSfJlGQeFAT119wkFZhLu+
-FfLGqoEMH0ijJg/8PpdpFRK3I94YcISoTNN6yxMvE6xdDGfKCt5a+IX5bwQi9Zdc
-B242gEc6tQKBgA6tM8n7KFlAIZU9HuWgk2AUC8kKutFPmSD7tgAqXDYI4FNfugs+
-MEEYyHCB4UNujJBV4Ss6YZCAkh6eyD4U2aca1eElCfm40vBVMdzvpqZdAqLtWXxg
-D9l3mgszrFaYGCY2Fr6jLV9lP5g3xsxUjudf9jSLY9HvpfzjRrMaNATVAoGBALTl
-/vYfPMucwKlC5B7++J0e4/7iv6vUu9SyHocdZh1anb9AjPDKjXLIlZT4RhQ8R0XK
-0wOw5JpttU2uN08TKkbLNk3/vYhbKVjPLjrQSseh8sjDLgsqw1QwIxYnniLVakVY
-p+rvjSNrNyqicQCMKQavwgocvSd5lJRTMwxOMezlAoGBAKWj71BX+0CK00/2S6lC
-TcNcuUPG0d8y1czZ4q6tUlG4htwq1FMOpaghATXjkdsOGTLS+H1aA0Kt7Ai9zDhc
-/bzOJEJ+jvBXV4Gcs7jl1r/HTKv0tT9ZSI5Vzkida0rfqxDGzcMVlLuCdH0cb8Iu
-N0wdmCAqlQwHR13+F1zrAD7V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 -----END PRIVATE KEY-----
diff --git a/plugins/tests/check_curl.t b/plugins/tests/check_curl.t
index 29cb03f..aa72ef6 100755
--- a/plugins/tests/check_curl.t
+++ b/plugins/tests/check_curl.t
@@ -228,23 +228,25 @@ SKIP: {
         skip "HTTP::Daemon::SSL not installed", $common_tests + $ssl_only_tests if ! exists $servers->{https};
         run_common_tests( { command => "$command -p $port_https", ssl => 1 } );
 
+        my $expiry = "Thu Nov 28 21:02:11 2030 +0000";
+
         $result = NPTest->testCmd( "$command -p $port_https -S -C 14" );
         is( $result->return_code, 0, "$command -p $port_https -S -C 14" );
-        is( $result->output, "OK - Certificate 'Monitoring Plugins' will expire on Fri Feb 16 15:31:44 2029 +0000.", "output ok" );
+        is( $result->output, "OK - Certificate 'Monitoring Plugins' will expire on $expiry.", "output ok" );
 
         $result = NPTest->testCmd( "$command -p $port_https -S -C 14000" );
         is( $result->return_code, 1, "$command -p $port_https -S -C 14000" );
-        like( $result->output, '/WARNING - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(Fri Feb 16 15:31:44 2029 \+0000\)./', "output ok" );
+        like( $result->output, '/WARNING - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(' . quotemeta($expiry) . '\)./', "output ok" );
 
         # Expired cert tests
         $result = NPTest->testCmd( "$command -p $port_https -S -C 13960,14000" );
         is( $result->return_code, 2, "$command -p $port_https -S -C 13960,14000" );
-        like( $result->output, '/CRITICAL - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(Fri Feb 16 15:31:44 2029 \+0000\)./', "output ok" );
+        like( $result->output, '/CRITICAL - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(' . quotemeta($expiry) . '\)./', "output ok" );
 
         $result = NPTest->testCmd( "$command -p $port_https_expired -S -C 7" );
         is( $result->return_code, 2, "$command -p $port_https_expired -S -C 7" );
         is( $result->output,
-                'CRITICAL - Certificate \'Monitoring Plugins\' expired on Wed Jan  2 11:00:26 2008 +0000.',
+                'CRITICAL - Certificate \'Monitoring Plugins\' expired on Wed Jan  2 12:00:00 2008 +0000.',
                 "output ok" );
 
 }
diff --git a/plugins/tests/check_http.t b/plugins/tests/check_http.t
index 188f5e7..ea11b2a 100755
--- a/plugins/tests/check_http.t
+++ b/plugins/tests/check_http.t
@@ -3,16 +3,7 @@
 # Test check_http by having an actual HTTP server running
 #
 # To create the https server certificate:
-# openssl req -new -x509 -keyout server-key.pem -out server-cert.pem -days 3650 -nodes
-# to create a new expired certificate:
-# faketime '2008-01-01 12:00:00' openssl req -new -x509 -keyout expired-key.pem -out expired-cert.pem -days 1 -nodes
-# Country Name (2 letter code) [AU]:DE
-# State or Province Name (full name) [Some-State]:Bavaria
-# Locality Name (eg, city) []:Munich
-# Organization Name (eg, company) [Internet Widgits Pty Ltd]:Monitoring Plugins
-# Organizational Unit Name (eg, section) []:
-# Common Name (e.g. server FQDN or YOUR name) []:Monitoring Plugins
-# Email Address []:devel@monitoring-plugins.org
+# ./certs/generate-certs.sh
 
 use strict;
 use Test::More;
@@ -23,7 +14,7 @@ $ENV{'LC_TIME'} = "C";
 
 my $common_tests = 70;
 my $virtual_port_tests = 8;
-my $ssl_only_tests = 8;
+my $ssl_only_tests = 12;
 # Check that all dependent modules are available
 eval "use HTTP::Daemon 6.01;";
 plan skip_all => 'HTTP::Daemon >= 6.01 required' if $@;
@@ -59,61 +50,87 @@ $HTTP::Daemon::VERSION = "1.00";
 my $port_http = 50000 + int(rand(1000));
 my $port_https = $port_http + 1;
 my $port_https_expired = $port_http + 2;
+my $port_https_clientcert = $port_http + 3;
 
 # This array keeps sockets around for implementing timeouts
 my @persist;
 
 # Start up all servers
 my @pids;
-my $pid = fork();
-if ($pid) {
-        # Parent
-        push @pids, $pid;
-        if (exists $servers->{https}) {
-                # Fork a normal HTTPS server
-                $pid = fork();
-                if ($pid) {
-                        # Parent
-                        push @pids, $pid;
-                        # Fork an expired cert server
-                        $pid = fork();
-                        if ($pid) {
-                                push @pids, $pid;
-                        } else {
-                                my $d = HTTP::Daemon::SSL->new(
-                                        LocalPort => $port_https_expired,
-                                        LocalAddr => "127.0.0.1",
-                                        SSL_cert_file => "$Bin/certs/expired-cert.pem",
-                                        SSL_key_file => "$Bin/certs/expired-key.pem",
-                                ) || die;
-                                print "Please contact https expired at: <URL:", $d->url, ">\n";
-                                run_server( $d );
-                                exit;
-                        }
-                } else {
-                        # closing the connection after -C cert checks make the daemon exit with a sigpipe otherwise
-                        local $SIG{'PIPE'} = 'IGNORE';
-                        my $d = HTTP::Daemon::SSL->new(
-                                LocalPort => $port_https,
-                                LocalAddr => "127.0.0.1",
-                                SSL_cert_file => "$Bin/certs/server-cert.pem",
-                                SSL_key_file => "$Bin/certs/server-key.pem",
-                        ) || die;
-                        print "Please contact https at: <URL:", $d->url, ">\n";
-                        run_server( $d );
-                        exit;
-                }
-        }
-} else {
-        # Child
-        #print "child\n";
+# Fork a HTTP server
+my $pid = fork;
+defined $pid or die "Failed to fork";
+if (!$pid) {
+        undef @pids;
         my $d = HTTP::Daemon->new(
                 LocalPort => $port_http,
                 LocalAddr => "127.0.0.1",
         ) || die;
         print "Please contact http at: <URL:", $d->url, ">\n";
         run_server( $d );
-        exit;
+        die "webserver stopped";
+}
+push @pids, $pid;
+
+if (exists $servers->{https}) {
+        # Fork a normal HTTPS server
+        $pid = fork;
+        defined $pid or die "Failed to fork";
+        if (!$pid) {
+                undef @pids;
+                # closing the connection after -C cert checks make the daemon exit with a sigpipe otherwise
+                local $SIG{'PIPE'} = 'IGNORE';
+                my $d = HTTP::Daemon::SSL->new(
+                        LocalPort => $port_https,
+                        LocalAddr => "127.0.0.1",
+                        SSL_cert_file => "$Bin/certs/server-cert.pem",
+                        SSL_key_file => "$Bin/certs/server-key.pem",
+                ) || die;
+                print "Please contact https at: <URL:", $d->url, ">\n";
+                run_server( $d );
+                die "webserver stopped";
+        }
+        push @pids, $pid;
+
+        # Fork an expired cert server
+        $pid = fork;
+        defined $pid or die "Failed to fork";
+        if (!$pid) {
+                undef @pids;
+                # closing the connection after -C cert checks make the daemon exit with a sigpipe otherwise
+                local $SIG{'PIPE'} = 'IGNORE';
+                my $d = HTTP::Daemon::SSL->new(
+                        LocalPort => $port_https_expired,
+                        LocalAddr => "127.0.0.1",
+                        SSL_cert_file => "$Bin/certs/expired-cert.pem",
+                        SSL_key_file => "$Bin/certs/expired-key.pem",
+                ) || die;
+                print "Please contact https expired at: <URL:", $d->url, ">\n";
+                run_server( $d );
+                die "webserver stopped";
+        }
+        push @pids, $pid;
+
+        # Fork an client cert expecting server
+        $pid = fork;
+        defined $pid or die "Failed to fork";
+        if (!$pid) {
+                undef @pids;
+                # closing the connection after -C cert checks make the daemon exit with a sigpipe otherwise
+                local $SIG{'PIPE'} = 'IGNORE';
+                my $d = HTTP::Daemon::SSL->new(
+                        LocalPort => $port_https_clientcert,
+                        LocalAddr => "127.0.0.1",
+                        SSL_cert_file => "$Bin/certs/server-cert.pem",
+                        SSL_key_file => "$Bin/certs/server-key.pem",
+                        SSL_verify_mode => IO::Socket::SSL->SSL_VERIFY_PEER | IO::Socket::SSL->SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
+                        SSL_ca_file => "$Bin/certs/clientca-cert.pem",
+                ) || die;
+                print "Please contact https client cert at: <URL:", $d->url, ">\n";
+                run_server( $d );
+                die "webserver stopped";
+        }
+        push @pids, $pid;
 }
 
 # give our webservers some time to startup
@@ -122,60 +139,62 @@ sleep(3);
 # Run the same server on http and https
 sub run_server {
         my $d = shift;
-        MAINLOOP: while (my $c = $d->accept ) {
-                while (my $r = $c->get_request) {
-                        if ($r->method eq "GET" and $r->url->path =~ m^/statuscode/(\d+)^) {
-                                $c->send_basic_header($1);
-                                $c->send_crlf;
-                        } elsif ($r->method eq "GET" and $r->url->path =~ m^/file/(.*)^) {
-                                $c->send_basic_header;
-                                $c->send_crlf;
-                                $c->send_file_response("$Bin/var/$1");
-                        } elsif ($r->method eq "GET" and $r->url->path eq "/slow") {
-                                $c->send_basic_header;
-                                $c->send_crlf;
-                                sleep 1;
-                                $c->send_response("slow");
-                        } elsif ($r->url->path eq "/method") {
-                                if ($r->method eq "DELETE") {
-                                        $c->send_error(HTTP::Status->RC_METHOD_NOT_ALLOWED);
-                                } elsif ($r->method eq "foo") {
-                                        $c->send_error(HTTP::Status->RC_NOT_IMPLEMENTED);
+        while (1) {
+                MAINLOOP: while (my $c = $d->accept) {
+                        while (my $r = $c->get_request) {
+                                if ($r->method eq "GET" and $r->url->path =~ m^/statuscode/(\d+)^) {
+                                        $c->send_basic_header($1);
+                                        $c->send_crlf;
+                                } elsif ($r->method eq "GET" and $r->url->path =~ m^/file/(.*)^) {
+                                        $c->send_basic_header;
+                                        $c->send_crlf;
+                                        $c->send_file_response("$Bin/var/$1");
+                                } elsif ($r->method eq "GET" and $r->url->path eq "/slow") {
+                                        $c->send_basic_header;
+                                        $c->send_crlf;
+                                        sleep 1;
+                                        $c->send_response("slow");
+                                } elsif ($r->url->path eq "/method") {
+                                        if ($r->method eq "DELETE") {
+                                                $c->send_error(HTTP::Status->RC_METHOD_NOT_ALLOWED);
+                                        } elsif ($r->method eq "foo") {
+                                                $c->send_error(HTTP::Status->RC_NOT_IMPLEMENTED);
+                                        } else {
+                                                $c->send_status_line(200, $r->method);
+                                        }
+                                } elsif ($r->url->path eq "/postdata") {
+                                        $c->send_basic_header;
+                                        $c->send_crlf;
+                                        $c->send_response($r->method.":".$r->content);
+                                } elsif ($r->url->path eq "/redirect") {
+                                        $c->send_redirect( "/redirect2" );
+                                } elsif ($r->url->path eq "/redir_external") {
+                                        $c->send_redirect(($d->isa('HTTP::Daemon::SSL') ? "https" : "http") . "://169.254.169.254/redirect2" );
+                                } elsif ($r->url->path eq "/redirect2") {
+                                        $c->send_basic_header;
+                                        $c->send_crlf;
+                                        $c->send_response(HTTP::Response->new( 200, 'OK', undef, 'redirected' ));
+                                } elsif ($r->url->path eq "/redir_timeout") {
+                                        $c->send_redirect( "/timeout" );
+                                } elsif ($r->url->path eq "/timeout") {
+                                        # Keep $c from being destroyed, but prevent severe leaks
+                                        unshift @persist, $c;
+                                        delete($persist[1000]);
+                                        next MAINLOOP;
+                                } elsif ($r->url->path eq "/header_check") {
+                                        $c->send_basic_header;
+                                        $c->send_header('foo');
+                                        $c->send_crlf;
+                                } elsif ($r->url->path eq "/virtual_port") {
+                                        # return sent Host header
+                                        $c->send_basic_header;
+                                        $c->send_crlf;
+                                        $c->send_response(HTTP::Response->new( 200, 'OK', undef, $r->header ('Host')));
                                 } else {
-                                        $c->send_status_line(200, $r->method);
+                                        $c->send_error(HTTP::Status->RC_FORBIDDEN);
                                 }
-                        } elsif ($r->url->path eq "/postdata") {
-                                $c->send_basic_header;
-                                $c->send_crlf;
-                                $c->send_response($r->method.":".$r->content);
-                        } elsif ($r->url->path eq "/redirect") {
-                                $c->send_redirect( "/redirect2" );
-                        } elsif ($r->url->path eq "/redir_external") {
-                                $c->send_redirect(($d->isa('HTTP::Daemon::SSL') ? "https" : "http") . "://169.254.169.254/redirect2" );
-                        } elsif ($r->url->path eq "/redirect2") {
-                                $c->send_basic_header;
-                                $c->send_crlf;
-                                $c->send_response(HTTP::Response->new( 200, 'OK', undef, 'redirected' ));
-                        } elsif ($r->url->path eq "/redir_timeout") {
-                                $c->send_redirect( "/timeout" );
-                        } elsif ($r->url->path eq "/timeout") {
-                                # Keep $c from being destroyed, but prevent severe leaks
-                                unshift @persist, $c;
-                                delete($persist[1000]);
-                                next MAINLOOP;
-                        } elsif ($r->url->path eq "/header_check") {
-                                $c->send_basic_header;
-                                $c->send_header('foo');
-                                $c->send_crlf;
-                        } elsif ($r->url->path eq "/virtual_port") {
-                                # return sent Host header
-                                $c->send_basic_header;
-                                $c->send_crlf;
-                                $c->send_response(HTTP::Response->new( 200, 'OK', undef, $r->header ('Host')));
-                        } else {
-                                $c->send_error(HTTP::Status->RC_FORBIDDEN);
+                                $c->close;
                         }
-                        $c->close;
                 }
         }
 }
@@ -200,25 +219,44 @@ SKIP: {
         skip "HTTP::Daemon::SSL not installed", $common_tests + $ssl_only_tests if ! exists $servers->{https};
         run_common_tests( { command => "$command -p $port_https", ssl => 1 } );
 
+        my $expiry = "Thu Nov 28 21:02:11 2030 +0000";
+
         $result = NPTest->testCmd( "$command -p $port_https -S -C 14" );
         is( $result->return_code, 0, "$command -p $port_https -S -C 14" );
-        is( $result->output, "OK - Certificate 'Monitoring Plugins' will expire on Fri Feb 16 15:31:44 2029 +0000.", "output ok" );
+        is( $result->output, "OK - Certificate 'Monitoring Plugins' will expire on $expiry.", "output ok" );
 
         $result = NPTest->testCmd( "$command -p $port_https -S -C 14000" );
         is( $result->return_code, 1, "$command -p $port_https -S -C 14000" );
-        like( $result->output, '/WARNING - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(Fri Feb 16 15:31:44 2029 \+0000\)./', "output ok" );
+        like( $result->output, '/WARNING - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(' . quotemeta($expiry) . '\)./', "output ok" );
 
         # Expired cert tests
         $result = NPTest->testCmd( "$command -p $port_https -S -C 13960,14000" );
         is( $result->return_code, 2, "$command -p $port_https -S -C 13960,14000" );
-        like( $result->output, '/CRITICAL - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(Fri Feb 16 15:31:44 2029 \+0000\)./', "output ok" );
+        like( $result->output, '/CRITICAL - Certificate \'Monitoring Plugins\' expires in \d+ day\(s\) \(' . quotemeta($expiry) . '\)./', "output ok" );
 
         $result = NPTest->testCmd( "$command -p $port_https_expired -S -C 7" );
         is( $result->return_code, 2, "$command -p $port_https_expired -S -C 7" );
         is( $result->output,
-                'CRITICAL - Certificate \'Monitoring Plugins\' expired on Wed Jan  2 11:00:26 2008 +0000.',
+                'CRITICAL - Certificate \'Monitoring Plugins\' expired on Wed Jan  2 12:00:00 2008 +0000.',
                 "output ok" );
 
+        # client cert tests
+        my $cmd;
+        $cmd = "$command -p $port_https_clientcert"
+                . " -J \"$Bin/certs/client-cert.pem\""
+                . " -K \"$Bin/certs/client-key.pem\""
+                . " -u /statuscode/200";
+        $result = NPTest->testCmd($cmd);
+        is( $result->return_code, 0, $cmd);
+        like( $result->output, '/^HTTP OK: HTTP/1.1 200 OK - \d+ bytes in [\d\.]+ second/', "Output correct: ".$result->output );
+
+        $cmd = "$command -p $port_https_clientcert"
+                . " -J \"$Bin/certs/clientchain-cert.pem\""
+                . " -K \"$Bin/certs/clientchain-key.pem\""
+                . " -u /statuscode/200";
+        $result = NPTest->testCmd($cmd);
+        is( $result->return_code, 0, $cmd);
+        like( $result->output, '/^HTTP OK: HTTP/1.1 200 OK - \d+ bytes in [\d\.]+ second/', "Output correct: ".$result->output );
 }
 
 my $cmd;