PowerEdge: Como verificar, validar e converter certificado SSL usando comandos OpenSSL e Keytool

Summary: Como verificar, validar e converter certificados SSL usando OpenSSL e Keytool. Este artigo inclui comandos para verificações de impressões digitais, PEM, DER, PKCS12 e certificado.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Instructions

Como mostrar o conteúdo de um certificado:

  • Comando para mostrar o conteúdo do certificado no OpenSSL:
$ openssl x509 -in <cert_file_name> -noout -text
Exemplo de resultado: 
$ openssl x509 -in sin1091.cer -noout -text
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            dd:a5:5c:60:f9:b7:16:9e
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: CN=CA, DC=vsphere, DC=local, C=US, ST=California, O=sin1090, OU=VMware
        Validity
            Not Before: May 24 10:29:00 2017 GMT
            Not After : Feb 19 12:22:39 2027 GMT
        Subject: CN=sin1091.eu.degussanet.com, C=US
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:c3:24:d9:23:08:32:ca:0e:f9:60:58:f0:8b:04:
                    6e:db:73:b1:83:a1:73:44:09:30:d7:64:6e:2f:26:
                    e5:87:fd:b9:f3:e6:10:78:32:f5:7c:8b:7f:c1:06:
                    d5:d1:42:d3:d8:e0:d0:84:91:c8:1c:4e:7e:2b:af:
                    65:36:5e:87:b0:43:4c:fa:ae:ca:c3:23:2d:75:15:
                    6a:d5:5f:66:6b:40:f6:c5:48:7a:8d:e5:f1:dd:4e:
                    aa:eb:89:65:8a:7e:69:eb:35:4f:75:56:88:24:48:
                    c7:9b:19:fb:39:43:ee:8a:bb:f5:1a:9b:b5:a3:47:
                    b1:60:ee:9a:72:f6:7b:d0:1f:ed:73:64:5f:e9:60:
                    75:64:03:25:a3:41:38:6d:06:22:dc:22:70:ae:9d:
                    b5:f8:26:7a:8e:d6:05:b1:97:67:89:ac:2c:b3:83:
                    8b:31:33:a8:7e:30:58:2c:10:42:ef:b6:05:98:ca:
                    6c:01:c9:47:9e:01:6e:be:c6:bc:cd:9f:e8:bc:8f:
                    94:70:f1:21:af:ae:b4:fd:76:db:a7:88:fc:e5:d7:
                    ea:08:eb:58:b9:41:37:af:7b:ec:f8:a1:b0:09:a7:
                    b9:b7:18:5b:a7:8e:b9:2f:b0:71:2a:3d:46:8b:c6:
                    4a:23:43:d9:21:94:2e:0e:e9:40:07:61:22:2e:b4:
                    08:27
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Subject Alternative Name:
                DNS:sin1091.eu.degussanet.com
            X509v3 Subject Key Identifier:
                D7:4D:DB:D4:00:3A:45:A8:4E:5E:9A:60:DB:C0:94:EA:C0:94:75:DC
            X509v3 Authority Key Identifier:
                keyid:5F:81:58:14:37:20:61:1D:BC:47:F2:97:AF:39:45:F0:A5:A9:19:F4

    Signature Algorithm: sha256WithRSAEncryption
         99:9c:b1:e5:b2:9d:b1:ef:65:8f:3b:de:87:16:01:6e:bb:a2:
         37:cc:13:28:a2:a1:0b:88:04:c8:85:d0:34:19:d0:3d:41:e4:
         d3:6f:54:6f:ce:0d:25:a5:f1:c4:8e:cd:e3:e4:ca:92:1f:67:
         3a:bd:27:21:59:37:67:a6:71:53:a4:ab:e5:d4:2c:a4:8f:a4:
         f3:c9:de:6f:5f:f5:80:38:3f:9e:87:24:c7:dc:9e:d3:45:93:
         a1:4e:31:db:20:df:84:86:06:c8:39:21:9d:04:57:1f:a2:17:
         9b:e4:c7:77:61:73:9b:fe:b2:ac:66:ad:14:50:3a:82:65:10:
         3d:bc:15:0b:08:60:79:c1:d1:55:28:25:a4:9b:95:ae:c3:52:
         31:66:e9:a3:08:57:4c:ff:5a:ac:5e:09:6c:89:5b:cc:43:ad:
         0a:e5:dd:b7:8a:6a:be:e7:52:e9:cf:c9:4a:38:77:05:4c:00:
         ca:22:2e:e8:8d:a2:37:da:38:bc:5e:ce:2d:aa:5d:44:c8:58:
         cb:7e:a4:be:fb:0b:b3:b4:88:66:ed:8b:ac:41:b8:8d:8b:48:
         e5:1a:8e:45:ba:be:42:a3:39:07:85:f5:09:91:c3:38:d5:bf:
         73:3d:ba:6c:5c:cf:bc:4b:f9:3e:7b:9c:a6:bb:2b:10:c4:87:
         76:35:f1:0d
  • Comando para mostrar certificados ou pares de chaves que são armazenados em um keystore usando keytool. PrivateKeyEntry significa que ele armazena entradas de chave privada e cadeia de certificados. TrustedCertEntry significa que ele armazena apenas certificados confiáveis e entradas de cadeia de certificados: 
$ keytool -list -v -in <keystore_file_name>
Exemplo de saída
* * *
  
Alias name: vcenter_ca
Creation date: Mar 31, 2023
Entry type: trustedCertEntry

Owner: CN=vc.x400.sh, OU=Dell EMC, O=Dell EMC, L=Shanghai, ST=Shanghai, C=CN
Issuer: CN=vc.x400.sh, OU=Dell EMC, O=Dell EMC, L=Shanghai, ST=Shanghai, C=CN
Serial number: 840f560790ff8a93
Valid from: Fri Mar 31 18:51:25 CST 2023 until: Sat Mar 30 18:51:25 CST 2024
Certificate fingerprints:
         SHA1: 69:F4:39:70:C8:A4:EC:64:C1:46:04:81:44:A1:30:3C:A9:71:12:D0
         SHA256: 6C:D7:62:58:BE:AC:A3:D7:25:84:1F:65:93:23:4C:35:5F:25:B6:D2:A0:67:A1:FD:8C:A9:62:3A:D9:0E:24:D3
Signature algorithm name: SHA256withRSA
Subject Public Key Algorithm: 3072-bit RSA key
Version: 3
* * *
 

Como mostrar impressão digital ou impressão digital do certificado:

  • O comando para mostrar uma impressão digital do certificado no OpenSSL por padrão é impressão digital sha1 no OpenSSL. Certifique-se de usar o mesmo algorismo de hash ao comparar com outro certificado:
$ openssl x509 -in <certificate file> -noout -fingerprint [-sha1 or -sha256 or -sha512]

Exemplo de resultado:

$ openssl x509 -in server.pem -noout -fingerprint
SHA1 Fingerprint=DD:48:AE:B1:D5:7D:DF:B9:A4:B3:A9:4A:C4:CF:76:6C:C1:CE:3A:C9
  • O comando para mostrar a impressão digital do certificado no keytool por padrão é sha256:
$ keytool -list -keystore <keystore file> 

Exemplo de resultado:

$ keytool -list -keystore mykeystore.p12 -storepass Idpa_1234
Keystore type: PKCS12
Keystore provider: JsafeJCE

Your keystore contains 3 entries

website, Mar 31, 2023, trustedCertEntry,
Certificate fingerprint (SHA-256): E8:16:50:4E:9A:F1:48:7F:8E:12:8B:C2:51:DD:45:7B:26:0D:5F:81:49:17:77:3F:35:6F:B2:8E:2B:A0:12:42
tomcat, Mar 31, 2023, PrivateKeyEntry,
Certificate fingerprint (SHA-256): CD:CD:9B:3A:9A:78:CF:3C:B8:5A:21:AF:9B:BF:4B:3F:1B:7F:91:D0:38:6B:FF:14:23:FB:8E:46:AE:90:9D:E0
vcenter_ca, Mar 31, 2023, trustedCertEntry,
Certificate fingerprint (SHA-256): 6C:D7:62:58:BE:AC:A3:D7:25:84:1F:65:93:23:4C:35:5F:25:B6:D2:A0:67:A1:FD:8C:A9:62:3A:D9:0E:24:D3

Como converter certificado e chave privada entre diferentes formatos:

  • Converter formato de certificado de DER para PEM:
$ openssl x509 -in <certificate file in DER format> -inform DER -out <certificate file in PEM format>
  • Converter o formato de certificado de PKCS7 para PEM
$ openssl pkcs7 -print_certs -in <certificate file in PKCS7 format> -inform DER -out <certificate file in PEM format>
  • Converter o formato de certificado e chave privada de PKCS12 para PEM.
(O primeiro comando é extrair o arquivo de certificado em um formato PEM, o segundo comando é extrair o arquivo de chave privada em um formato PEM.) 
$ openssl pkcs12 -in <certificate file in PKCS12 format> -name <alias name> -nokeys -out <certificate file in PEM format>

$ openssl pkcs12 -in <certificate file in PKCS12 format> -name <alias name> -nodes -nocerts -out <private key file in PEM format>
  • Converter arquivos de par de certificados ou chaves privadas do repositório de chaves PEM para PKCS12
(Neste exemplo, o arquivo de certificado PEM é server.crt, o arquivo de chave privada está server.key, o alias do keystore está definido como "mykeypair" e o arquivo de keystore do PKCS12 é mykeystore.p12) 
$ openssl pkcs12 -export -in <certificate file in PEM format> -inkey <private key file in PEM format> -name <alias name> -out <keystore file in PKCS12 format>

Como validar um certificado no handshake HTTPS usando OpenSSL.

  • Use um dos seguintes comandos para validar o certificado:
$ openssl s_client -CApath <path_to_certs> -connect <VC_FQDN>:443 -showcerts
Or
$ openssl s_client -CApath <path_to_certs> -host <VC_FQDN> -port:443 -showcerts
Exemplo de resultado de sucesso (este comando pode demorar um pouco para concluir a execução): 
$ openssl s_client -CApath /tmp/certs/ -connect 10.10.10.100:443 -showcerts
CONNECTED(00000104)
---
Certificate chain
 0 s:/CN=vc18.externalvc.com/C=US
   i:/CN=CA/DC=vsphere/DC=local/C=US/ST=California/O=psc18.externalvc.com/OU=VMware
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
---
Server certificate
subject=/CN=vc18.externalvc.com/C=US
issuer=/CN=CA/DC=vsphere/DC=local/C=US/ST=California/O=psc18.externalvc.com/OU=VMware
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 1412 bytes and written 434 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
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES256-GCM-SHA384
    Session-ID:
    Session-ID-ctx:
    Master-Key: 70FD868AA56807820DDAC23C2FAB3F2C1A5C683426F2924AEE8D9B52EBCD3F256EC4892D281F90F0F32A2A1C7DD0FB01
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1500280372
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)
---
depth=1 CN = CA, DC = vsphere, DC = local, C = US, ST = California, O = psc18.externalvc.com, OU = VMware
verify return:1
depth=0 CN = vc18.externalvc.com, C = US
verify return:1
read:errno=0
Exemplo de resultado da falha: 
$ openssl s_client -CApath /tmp/certs/ -host 10.62.91.64 -port 443 -showcerts
CONNECTED(00000124)
---
Certificate chain
 0 s:/CN=vc18.externalvc.com/C=US
   i:/CN=CA/DC=vsphere/DC=local/C=US/ST=California/O=psc18.externalvc.com/OU=VMware
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
---
Server certificate
subject=/CN=vc18.externalvc.com/C=US
issuer=/CN=CA/DC=vsphere/DC=local/C=US/ST=California/O=psc18.externalvc.com/OU=VMware
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 1412 bytes and written 434 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
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES256-GCM-SHA384
    Session-ID:
    Session-ID-ctx:
    Master-Key: 85731E71188EF310D68C658099C62C11374845CAF00A0AF90F8B35118171C7D0002A76380AB2B4574C720DB178FA3297
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1500281143
    Timeout   : 300 (sec)
    Verify return code: 21 (unable to verify the first certificate)
---
depth=0 CN = vc18.externalvc.com, C = US
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 CN = vc18.externalvc.com, C = US
verify error:num=21:unable to verify the first certificate
verify return:1
read:errno=0

Como validar o certificado do vCenter off-line:

Se você não conseguir se conectar ao vCenter e fazer a verificação on-line, poderá exportar o certificado do vCenter do navegador da Web e salvá-lo em um arquivo para validação.

  1. Converta o arquivo de DER para o formato PEM.
  2. Use o seguinte comando para validar:
$openssl verify -CApath <path_to_certs> <certificate_file>

 

Nota: Esse comando só aceita o arquivo de certificado no formato PEM como destino.


Como validar um par de chaves pública ou privada usando OpenSSL:

  • Calcule um valor de hash do módulo de chave privada:
$ openssl rsa -modulus -noout -in <private key file> | openssl md5
  • Calcule um valor de hash do módulo de certificado:
$ openssl x509 -modulus -noout -in <certificate file> | openssl md5

Se as duas cadeias de caracteres de hash forem iguais, isso significa que o par de chaves corresponde. Caso contrário, não é um par de chaves válido.

Exemplo de resultado:

openssl rsa -modulus -noout -in server.key | openssl md5
(stdin)= b69cd7fc0b07ffef0a577e1e325ab015

openssl x509 -modulus -noout -in server.crt | openssl md5
(stdin)= b69cd7fc0b07ffef0a577e1e325ab015

Additional Information

Mais informações:

  • Saiba mais sobre os diferentes formatos de certificado SSL em TutorialsTeacherEsse hiperlink direcionará você para um site fora da Dell Technologies..
  • Como usar o testssl .
Testssl é uma ferramenta de linha de comando gratuita que verifica o serviço de um servidor em qualquer porta para o suporte de cifras TLS / SSL, protocolos, bem como falhas criptográficas recentes e muito mais. Para obter mais informações, acesse Testando a criptografiaEsse hiperlink direcionará você para um site fora da Dell Technologies. TLS/SSL.

Affected Products

Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2025, Red Hat Enterprise Linux Version 7, Red Hat Enterprise Linux Version 9, Red Hat Enterprise Linux Version 8 , SUSE Linux Enterprise Server 15, Ubuntu Server LTS, VMware ESXi 7.x, VMware ESXi 8.x ...

Products

Converged Infrastructure, Data Center Infrastructure, Desktops & All-in-Ones, Gateways & Embedded PCs, Electronics & Accessories, Laptops, Networking, Security, Servers, Software, Solutions, Storage, Tablets, Thin Clients, Workstations
Article Properties
Article Number: 000211907
Article Type: How To
Last Modified: 18 Jul 2025
Version:  7
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.