Ssl
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OpenSSL
Заметки на полях что б каждый раз не читать мануал (ssl, openssl)
Получить сертефикат
openssl s_client -connect example.com:443
echo -n | openssl s_client -showcerts -connect api.diffbot.com:443 -servername api.diffbot.com
CONNECTED(00000003)
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
0 s:/CN=api.diffbot.com
i:/C=US/O=Let's Encrypt/CN=R3
-----BEGIN CERTIFICATE-----
MIIFJDCCBAygAwIBAgISBFLfLeNzhyHJCOLtTTFsrh7gMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMTA4MTIwNzI4NDRaFw0yMTExMTAwNzI4NDJaMBoxGDAWBgNVBAMT
D2FwaS5kaWZmYm90LmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
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wbiXI+outWMvqpD0pIbDsRHu8Xs2BS5n
-----END CERTIFICATE-----
1 s:/C=US/O=Let's Encrypt/CN=R3
i:/C=US/O=Internet Security Research Group/CN=ISRG Root X1
-----BEGIN CERTIFICATE-----
MIIFFjCCAv6gAwIBAgIRAJErCErPDBinU/bWLiWnX1owDQYJKoZIhvcNAQELBQAw
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nLRbwHOoq7hHwg==
-----END CERTIFICATE-----
2 s:/C=US/O=Internet Security Research Group/CN=ISRG Root X1
i:/O=Digital Signature Trust Co./CN=DST Root CA X3
-----BEGIN CERTIFICATE-----
MIIFYDCCBEigAwIBAgIQQAF3ITfU6UK47naqPGQKtzANBgkqhkiG9w0BAQsFADA/
MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
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Dfvp7OOGAN6dEOM4+qR9sdjoSYKEBpsr6GtPAQw4dy753ec5
-----END CERTIFICATE-----
---
Server certificate
subject=/CN=api.diffbot.com
issuer=/C=US/O=Let's Encrypt/CN=R3
---
No client certificate CA names sent
---
SSL handshake has read 4702 bytes and written 445 bytes
---
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-GCM-SHA384
Session-ID: 11834EAF003B0B311A756947F00C5FF07A14AEB57FE9374DBC2D2E51C805E1F0
Session-ID-ctx:
Master-Key: 261A38BACE36C1386B29F64D596D097AE428CAC303A377B9D6682ED304C1929336F96616405182D5B0E512D925B459EA
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
TLS session ticket lifetime hint: 300 (seconds)
TLS session ticket:
0000 - d5 bf f6 94 74 53 bb 5c-51 54 4e 62 fe dc af 7b ....tS.\QTNb...{
0010 - f2 45 52 46 d6 c1 84 cf-34 e1 b6 3b e1 3d b5 26 .ERF....4..;.=.&
0020 - f8 4a b6 d6 1e ae bc 89-a8 7f d0 dc 84 83 a9 6b .J.............k
0030 - d9 f4 9b ef 9a 82 da f3-bd e8 8b 8f 25 43 eb 96 ............%C..
0040 - 6b f6 b7 7f 16 ab 4e b0-11 b0 a9 0c f8 1f 13 15 k.....N.........
0050 - 1d fe 68 3f 0c f8 83 f0-50 45 1c b7 2f f2 ea 31 ..h?....PE../..1
0060 - 33 4a dc 35 63 46 cd a7-07 78 8f d1 40 f6 b2 ad 3J.5cF...x..@...
0070 - c6 06 90 b3 76 2d 61 61-ca c4 92 46 a2 78 72 59 ....v-aa...F.xrY
0080 - 53 dd eb cc f5 cb 91 a8-58 6c 64 58 4e 4d fd 5b S.......XldXNM.[
0090 - ef 98 89 0d 30 8a 57 18-1b c0 f6 c2 ea 2f 63 e4 ....0.W....../c.
00a0 - 6a d2 da 6c 34 c8 b6 a3-f7 79 25 d2 07 d1 08 18 j..l4....y%.....
00b0 - 0d 50 0f 9f e9 eb f6 16-ee c1 f9 dc 84 83 75 57 .P............uW
Start Time: 1633343371
Timeout : 300 (sec)
Verify return code: 20 (unable to get local issuer certificate)
---
DONE
Перевести в текст
openssl x509 -in FileName.pem -text
Валидация
openssl verify -verbose -CAfile rootCA.pem intermediateCA.cert.pem intermediateCA.cert.pem: OK
Валидация с подробностями когда в gd_bundle-g2-g1.crt содержится цепочка сертефикатов
openssl verify -verbose -no-CAfile -no-CApath -show_chain -CAfile gd_bundle-g2-g1.crt c97444e03355f98c.crt c97444e03355f98c.crt: OK Chain: depth=0: CN = container-cloud-auth.int.mirantis.com (untrusted) depth=1: C = US, ST = Arizona, L = Scottsdale, O = "GoDaddy.com, Inc.", OU = http://certs.godaddy.com/repository/, CN = Go Daddy Secure Certificate Authority - G2 depth=2: C = US, ST = Arizona, L = Scottsdale, O = "GoDaddy.com, Inc.", CN = Go Daddy Root Certificate Authority - G2 depth=3: C = US, O = "The Go Daddy Group, Inc.", OU = Go Daddy Class 2 Certification Authority
openssl verify -verbose -no-CAfile -no-CApath -no-CAstore -show_chain -partial_chain -CAfile root intermidiate intermidiate: OK Chain: depth=0: C = NL, O = Booking.com, CN = Booking.com Services Authority (untrusted) depth=1: C = NL, O = Booking.com, CN = Booking.com Authority X1
Проверка ключа
openssl x509 -noout -modulus -in cert.crt | openssl md5 openssl rsa -noout -modulus -in privkey.txt | openssl md5
Должно совпадать
Удаление пароля из ключа
openssl rsa -in [original.key] -out [new.key]
1
Verifying the certificate subject and issuer
This section describes how to get the subject and issuer of the certificates and verify that you have a valid certificate chain.
Run the following OpenSSL command to get the Subject and Issuer for each certificate in the chain from entity to root and verify that they form a proper certificate chain:
openssl x509 -text -in certificate | grep -E '(Subject|Issuer):'
Where certificate is the name of the certificate.
Verify that the certificates in the chain adhere to the following guidelines:
Subject of each certificate matches the Issuer of the preceding certificate in the chain (except for the Entity certificate).
Subject and Issuer are the same for the root certificate.
If the certificates in the chain adhere to these guidelines, then the certificate chain is considered to be complete and valid.
Sample certificate chain validation
The following example is the output of the OpenSSL commands for a sample certificate chain containing three certificates:
Entity certificate
openssl x509 -text -in entity.pem | grep -E '(Subject|Issuer):'
Issuer: C = US, O = Google Trust Services, CN = GTS CA 1O1
Subject: C = US, ST = California, L = Mountain View, O = Google LLC, CN = *.enterprise.apigee.com
Intermediate certificate
openssl x509 -text -in intermediate.pem | grep -E '(Subject|Issuer):'
Issuer: OU = GlobalSign Root CA - R2, O = GlobalSign, CN = GlobalSign
Subject: C = US, O = Google Trust Services, CN = GTS CA 1O1
Root certificate
openssl x509 -text -in root.pem | grep -E '(Subject|Issuer):'
Issuer: OU = GlobalSign Root CA - R2, O = GlobalSign, CN = GlobalSign
Subject: OU = GlobalSign Root CA - R2, O = GlobalSign, CN = GlobalSign
In the example shown above, notice the following:
The Subject of the intermediate certificate matches the Issuer of the entity certificate.
The Subject of the root certificate matches the Issuer of the intermediate certificate.
The Subject and Issuer are the same in the root certificate.
From the example above, you can confirm that the sample certificate chain is valid.
Verifying the certificate subject and issuer hash
This section explains how to get the hash of the subject and issuer of the certificates and verify that you have a valid certificate chain.
It is always a good practice to verify the hash sequence of certificates as it can help in identifying issues such as the Common Name (CN) of the certificate having unwanted space or special characters.
Run the following OpenSSL command to get the hash sequence for each certificate in the chain from entity to root and verify that they form a proper certificate chain.
openssl x509 -hash -issuer_hash -noout -in certificate
Where certificate is the name of the certificate.
Verify that the certificates in the chain adhere to the following guidelines:
Subject of each certificate matches the Issuer of the preceding certificate in the chain (except for the Entity certificate).
Subject and Issuer are the same for the root certificate.
If the certificates in the chain adhere to these guidelines, then the certificate chain is considered to be complete and valid.
Sample certificate chain validation through hash sequence
The following example is the output of the OpenSSL commands for a sample certificate chain containing three certificates:
openssl x509 -in entity.pem -hash -issuer_hash -noout
c54c66ba #this is subject hash
99bdd351 #this is issuer hash
openssl x509 -in intermediate.pem -hash -issuer_hash -noout
99bdd351
4a6481c9
openssl x509 -in root.pem -hash -issuer_hash -noout
4a6481c9
4a6481c9
In the example shown above, notice the following:
The subject hash of the intermediate certificate matches the issuer hash of the entity certificate.
The subject hash of the root certificate matches the issuer hash of the issuer certificate.
The subject and issuer hash are the same in the root certificate.
From the example above, you can confirm that the sample certificate chain is valid.
Verifying the certificate expiry
This section explains how to verify whether or not all the certificates in the chain are expired using of the following methods:
Get the start and end date of the certificate.
Get the expiry status.
START AND END DATE
EXPIRY STATUS
Run the following OpenSSL command to get the start and end date for each certificate in the chain from entity to root and verify that all the certificates in the chain are in force (start date is before today) and are not expired.
Sample certificate expiry validation through start and end dates
openssl x509 -startdate -enddate -noout -in entity.pem
notBefore=Feb 6 21:57:21 2020 GMT
notAfter=Feb 4 21:57:21 2021 GMT
openssl x509 -startdate -enddate -noout -in intermediate.pem
notBefore=Jun 15 00:00:42 2017 GMT
notAfter=Dec 15 00:00:42 2021 GMT
openssl x509 -startdate -enddate -noout -in root.pem
notBefore=Apr 13 10:00:00 2011 GMT
notAfter=Apr 13 10:00:00 2022 GMT
