Hortonworks Docs » DataFlow 3.3.0 » Apache NiFi Toolkit
Apache NiFi Toolkit
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Using An Existing Intermediate Certificate Authority (CA)

In some enterprise scenarios, a security/IT team may provide a signing certificate that has already been signed by the organization's certificate authority (CA). This intermediate CA can be used to sign the node (sometimes referred to as leaf) certificates that will be installed on each NiFi node, or the client certificates used to identify users. In order to inject the existing signing certificate into the toolkit process, follow these steps:

  1. Generate or obtain the signed intermediate CA keys in the following format (see additional commands below):

    • Public certificate in PEM format: nifi-cert.pem

    • Private key in PEM format: nifi-key.key

  2. Place the files in the toolkit working directory. This is the directory where the tool is configured to output the signed certificates. This is not necessarily the directory where the binary is located or invoked.

    • For example, given the following scenario, the toolkit command can be run from its location as long as the output directory -o is ../hardcoded/, and the existing nifi-cert.pem and nifi-key.key will be used.

      • e.g. $ ./toolkit/bin/tls-toolkit.sh standalone -o ./hardcoded/ -n 'node4.nifi.apache.org' -P thisIsABadPassword -S thisIsABadPassword -O will result in a new directory at ./hardcoded/node4.nifi.apache.org with a keystore and truststore containing a certificate signed by ./hardcoded/nifi-key.key

    • If the -o argument is not provided, the default working directory (.) must contain nifi-cert.pem and nifi-key.key

      • e.g. $ cd ./hardcoded/ && ../toolkit/bin/tls-toolkit.sh standalone -n 'node5.nifi.apache.org' -P thisIsABadPassword -S thisIsABadPassword -O 


         # Example directory structure *before* commands above are run

🔓 0s @ 18:07:58 $ tree -L 2
.
├── hardcoded
│   ├── CN=myusername.hardcoded_OU=NiFi.p12
│   ├── CN=myusername.hardcoded_OU=NiFi.password
│   ├── nifi-cert.pem
│   ├── nifi-key.key
│   ├── node1.nifi.apache.org
│   ├── node2.nifi.apache.org
│   └── node3.nifi.apache.org
└── toolkit
    ├── LICENSE
    ├── NOTICE
    ├── README
    ├── bin
    ├── conf
    ├── docs
    └── lib

Additional Commands

The nifi-cert.pem and nifi-key.key files should be ASCII-armored (Base64-encoded ASCII) files containing the CA public certificate and private key respectively. Here are sample files of each to show the expected format:

nifi-cert.pem

         # The first command shows the actual content of the encoded file, and the second parses it and shows the internal values

.../certs $ more nifi-cert.pem
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
.../certs $ openssl x509 -in nifi-cert.pem -text -noout
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            01:64:de:33:79:03:00:00:00:00
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: OU=NIFI, CN=nifi-ca.nifi.apache.org
        Validity
            Not Before: Jul 28 00:04:32 2018 GMT
            Not After : Jul 27 00:04:32 2021 GMT
        Subject: OU=NIFI, CN=nifi-ca.nifi.apache.org
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:aa:45:6b:ac:2f:80:90:56:e3:9c:2a:6e:a5:2c:
                    bc:e2:d4:c5:0e:c4:55:50:85:98:8f:f9:36:a5:5c:
                    02:d7:8e:4c:dd:ba:6b:d2:94:42:cc:bb:b3:a2:f0:
                    23:14:29:93:e4:bf:a2:b1:3b:cd:8e:18:a8:9e:ca:
                    a2:7f:4e:c4:6d:df:cc:da:9b:18:13:f4:62:87:63:
                    14:2e:c5:fa:2a:04:5e:d6:74:54:88:17:8a:17:4f:
                    21:96:64:81:30:60:c5:3e:3d:fd:c8:3c:c4:fd:5f:
                    5e:77:15:7f:28:68:d1:a9:58:30:fd:0c:b4:bf:06:
                    92:e6:e5:9d:5e:72:c3:87:3a:15:e3:f3:33:ee:51:
                    a6:62:83:1a:b1:9d:6e:7b:19:47:f7:78:e3:06:5d:
                    7e:10:52:f6:5e:86:b4:ea:82:db:12:88:c9:f5:32:
                    9a:5a:1a:46:f2:27:ad:11:e7:5f:ed:63:34:ce:a0:
                    44:cf:69:07:a3:d7:5d:16:4f:72:c6:20:a4:4f:84:
                    94:2a:70:d6:92:1c:1c:fe:8e:ae:b3:5b:c4:5e:84:
                    b0:fa:d9:ae:7c:76:3f:03:78:15:8a:18:d6:3c:81:
                    b3:ab:22:c5:97:d2:6e:37:b0:b2:25:ea:64:55:5a:
                    93:76:c9:01:1b:b4:bc:e4:6f:e4:06:58:b3:52:3e:
                    63:3b
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature, Non Repudiation, Key Encipherment, Data Encipherment, Key Agreement, Certificate Sign, CRL Sign
            X509v3 Basic Constraints:
                CA:TRUE
            X509v3 Subject Key Identifier:
                2A:25:81:29:B3:0C:43:5C:D4:69:B0:F8:80:8E:CB:54:E5:8E:73:2D
            X509v3 Authority Key Identifier:
                keyid:2A:25:81:29:B3:0C:43:5C:D4:69:B0:F8:80:8E:CB:54:E5:8E:73:2D

            X509v3 Extended Key Usage:
                TLS Web Client Authentication, TLS Web Server Authentication
    Signature Algorithm: sha256WithRSAEncryption
         31:7c:71:48:64:b3:b0:9b:02:2a:9d:22:3f:8a:bf:1f:fe:ec:
         c3:32:ad:3a:00:f1:c6:76:17:5e:20:a5:74:1d:1e:f8:06:d2:
         bd:e4:a1:60:e3:6c:de:5f:10:04:15:e8:9c:f7:c3:c2:fc:53:
         d5:b4:aa:66:d9:65:1a:d6:c9:4c:07:ea:0f:db:b7:11:c7:96:
         67:af:6f:a9:92:d6:aa:9c:ce:df:d8:98:0c:78:9f:1b:76:e3:
         47:dd:15:24:af:d8:f0:82:47:09:47:0c:82:23:87:f0:1c:2f:
         64:d7:c6:a2:cc:d7:4e:7f:6a:b6:52:04:17:c4:d5:da:2d:83:
         de:d7:b7:5e:b8:d5:70:c2:b7:e5:32:07:85:7d:5a:f0:6d:3d:
         ae:3c:94:cc:46:2d:43:15:0c:9c:ea:16:85:e2:fb:0e:49:24:
         73:13:a3:b2:0e:87:3e:ff:53:e9:c8:f5:bb:e4:e7:92:5d:e5:
         42:6d:cd:c0:10:0b:d1:b9:36:4c:05:0b:c1:41:4a:95:33:9d:
         5e:30:31:be:2b:7a:c2:7a:27:92:04:f3:a7:18:da:c4:0b:f3:
         e2:03:f0:af:68:c5:c1:12:88:3e:c4:f0:30:d5:28:18:7e:e0:
         b3:e2:b9:4c:dc:17:51:6b:9e:33:df:ea:0e:95:cf:31:6f:37:
         7b:c3:c4:37
nifi-key.key

         # The first command shows the actual content of the encoded file, and the second parses it and shows the internal values

.../certs $ more nifi-key.key
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
.../certs $ openssl rsa -in nifi-key.key -text -noout
Private-Key: (2048 bit)
modulus:
    00:aa:45:6b:ac:2f:80:90:56:e3:9c:2a:6e:a5:2c:
    bc:e2:d4:c5:0e:c4:55:50:85:98:8f:f9:36:a5:5c:
    02:d7:8e:4c:dd:ba:6b:d2:94:42:cc:bb:b3:a2:f0:
    23:14:29:93:e4:bf:a2:b1:3b:cd:8e:18:a8:9e:ca:
    a2:7f:4e:c4:6d:df:cc:da:9b:18:13:f4:62:87:63:
    14:2e:c5:fa:2a:04:5e:d6:74:54:88:17:8a:17:4f:
    21:96:64:81:30:60:c5:3e:3d:fd:c8:3c:c4:fd:5f:
    5e:77:15:7f:28:68:d1:a9:58:30:fd:0c:b4:bf:06:
    92:e6:e5:9d:5e:72:c3:87:3a:15:e3:f3:33:ee:51:
    a6:62:83:1a:b1:9d:6e:7b:19:47:f7:78:e3:06:5d:
    7e:10:52:f6:5e:86:b4:ea:82:db:12:88:c9:f5:32:
    9a:5a:1a:46:f2:27:ad:11:e7:5f:ed:63:34:ce:a0:
    44:cf:69:07:a3:d7:5d:16:4f:72:c6:20:a4:4f:84:
    94:2a:70:d6:92:1c:1c:fe:8e:ae:b3:5b:c4:5e:84:
    b0:fa:d9:ae:7c:76:3f:03:78:15:8a:18:d6:3c:81:
    b3:ab:22:c5:97:d2:6e:37:b0:b2:25:ea:64:55:5a:
    93:76:c9:01:1b:b4:bc:e4:6f:e4:06:58:b3:52:3e:
    63:3b
publicExponent: 65537 (0x10001)
privateExponent:
    07:56:46:75:7c:f6:85:41:b9:3d:19:76:fb:17:1a:
    6c:8b:ce:91:fc:53:d0:cc:70:ee:83:46:9f:89:7f:
    75:da:63:e5:8a:0a:eb:60:08:20:da:55:bb:47:ad:
    bb:48:af:5e:c4:03:36:af:e5:03:a2:7c:61:9b:49:
    b5:42:a7:a4:34:68:97:62:e7:7e:b4:a1:2a:44:52:
    b2:51:45:9e:59:e1:dc:4b:d6:f8:a6:4b:05:06:1b:
    e4:67:20:49:fd:61:82:75:19:62:6f:7b:ed:8f:16:
    7a:fb:2a:27:8b:9c:bd:37:57:a5:0f:cf:1a:0c:26:
    78:5c:9c:93:5d:4e:9f:9d:07:0c:d2:6b:35:50:c3:
    27:b6:72:c4:89:95:53:24:e3:db:76:97:10:70:71:
    ee:e8:86:e8:7e:f5:f2:fb:1b:71:d4:e5:2f:5d:d3:
    c4:13:d5:ba:e4:9c:c1:da:85:cc:35:49:8c:89:77:
    42:92:8d:12:42:07:ac:00:c6:70:19:98:96:09:d6:
    34:02:23:c6:08:0a:ad:23:45:7d:ab:87:11:17:b8:
    43:17:41:c6:a2:15:05:f3:0a:b9:90:11:7a:de:29:
    42:12:0e:f3:5e:bb:f8:7b:61:4f:54:bc:95:8f:65:
    21:46:9c:41:a0:9c:c3:f6:5e:f4:26:12:32:b7:ad:
    01
prime1:
    00:e7:e3:a4:a4:bb:22:2c:d3:07:1b:38:fb:d8:f8:
    81:92:af:36:b1:32:d0:27:6f:bc:b9:d6:29:e8:f8:
    5e:38:69:21:8e:35:e8:06:c7:b9:63:29:f2:1e:54:
    2d:e8:29:d5:a4:94:37:de:64:14:90:9f:b7:8a:5b:
    34:48:c1:6d:98:8d:eb:cf:7b:9d:ce:57:9e:93:5b:
    28:d8:bd:89:df:e0:88:e2:4b:7b:7c:50:9b:14:56:
    d5:5e:ff:9d:2c:da:e6:fa:d3:b0:eb:c2:78:f1:ab:
    32:69:df:24:12:71:d8:ab:d5:2c:fb:fd:cc:2c:39:
    85:25:84:ed:86:48:33:0a:91
prime2:
    00:bb:f9:a5:95:06:96:69:90:10:71:0f:14:b9:57:
    9a:b3:13:18:a0:df:33:32:6c:df:ae:4c:5c:f0:07:
    cd:c0:ac:45:f6:77:38:e3:2c:28:e2:72:6b:fa:ef:
    d4:55:11:98:a5:18:0c:ad:d9:65:e6:fc:f4:22:ae:
    bc:aa:4d:37:b2:96:96:ee:f0:c9:9f:c8:49:42:19:
    11:79:0c:35:8a:df:45:a7:fe:75:af:d3:07:cc:64:
    d5:6a:b3:91:24:66:b6:a1:9d:20:88:d7:bc:2c:d8:
    b3:0f:76:d0:d7:d8:44:be:3b:bd:9a:7d:31:f5:0e:
    b6:43:b7:5a:a5:5a:5f:7f:0b
exponent1:
    00:b4:2d:53:3e:94:10:e7:d7:48:8c:44:68:9b:9b:
    eb:c1:f7:d6:7d:34:c8:3b:fc:3c:1e:01:64:2b:1a:
    e0:ca:e0:15:2c:94:82:26:d2:85:1f:a1:f5:f8:ce:
    db:a4:aa:ec:cf:a6:43:0a:cf:a4:93:03:26:ef:a0:
    12:2d:fd:ed:94:3d:a1:de:63:64:a8:71:b8:4b:32:
    e7:b8:10:fd:d2:30:7a:eb:aa:4e:d6:b7:22:e8:58:
    d8:0d:aa:7b:8b:e0:c2:dc:5e:23:f7:eb:f1:61:85:
    ed:f4:09:67:d3:d5:15:cf:de:21:c7:e2:da:03:fa:
    e5:93:d3:87:63:71:32:07:a1
exponent2:
    40:fd:c0:ad:34:d8:de:68:ab:f6:9b:13:3c:3d:b8:
    c3:ff:6f:3d:77:ce:58:b9:e1:e0:7e:90:87:80:fb:
    37:89:98:aa:ed:6f:a2:c3:ca:e2:f8:52:b3:31:26:
    85:bf:0e:ba:ce:04:dc:3a:d5:0b:b7:1b:a5:be:2a:
    86:eb:29:bd:ba:69:36:f5:d3:90:46:0c:66:29:0a:
    ac:82:77:24:ab:ab:86:b8:e8:f1:c0:91:ea:ae:56:
    47:8d:0c:3a:bc:b4:9a:4e:1c:48:93:e6:80:ce:ef:
    a2:02:1f:94:f1:36:5b:5b:86:63:9a:b3:a2:19:d3:
    14:b8:99:43:a0:6a:72:1f
coefficient:
    00:91:8d:fa:90:8d:17:a5:61:5b:54:ee:3e:81:0f:
    d0:43:6c:27:e6:8a:9c:1a:44:d3:f4:0a:e0:06:39:
    5b:52:f9:49:c9:b9:a2:21:b1:71:50:40:61:01:b8:
    e9:df:16:28:c8:bd:be:d8:71:74:4b:e2:99:51:60:
    f3:2f:0e:a6:11:34:e6:ee:23:a0:3e:d7:13:6d:af:
    4d:34:9f:16:bf:1d:47:f3:29:57:88:f5:3b:27:f4:
    02:8c:5a:75:d2:f1:97:1f:4a:db:15:7f:7a:03:15:
    f7:d7:61:1a:82:69:67:ae:86:93:26:83:d4:f0:75:
    7a:00:bb:07:e9:13:91:82:9b
  1. To convert from DER encoded public certificate (cert.der) to PEM encoded (cert.pem):

    • If the DER file contains both the public certificate and private key, remove the private key with this command:

      • perl -pe 'BEGIN{undef $/;} s|-----BEGIN PRIVATE KEY-----.*?-----END PRIVATE KEY-----|Removed private key|gs' cert.der > cert.pem

    • If the DER file only contains the public certificate, use this command:

      • openssl x509 -inform der -in cert.der -out cert.pem

  2. To convert from a PKCS12 keystore (keystore.p12) containing both the public certificate and private key into PEM encoded files ($PASSWORD is the keystore password):

    • openssl pkcs12 -in keystore.p12 -out cert.der -nodes -password "pass:$PASSWORD"

    • openssl pkcs12 -in keystore.p12 -nodes -nocerts -out key.key -password "pass:$PASSWORD"

    • Follow the steps above to convert cert.der to cert.pem

  3. To convert from a Java Keystore (keystore.jks) containing private key into PEM encoded files ($P12_PASSWORD is the PKCS12 keystore password, $JKS_PASSWORD is the Java keystore password you want to set, and $ALIAS can be any value - the NiFi default is nifi-key):

    • keytool -importkeystore -srckeystore keystore.jks -destkeystore keystore.p12 -srcstoretype JKS -deststoretype PKCS12 -destkeypass "$P12_PASSWORD" -deststorepass "$P12_PASSWORD" -srcstorepass "$JKS_PASSWORD" -srcalias "$ALIAS" -destalias "$ALIAS"

    • Follow the steps above to convert from keystore.p12 to cert.pem and key.key

  4. To convert from PKCS #8 PEM format to PKCS #1 PEM format:

    • If the private key is provided in PKCS #8 format (the file begins with -----BEGIN PRIVATE KEY----- rather than -----BEGIN RSA PRIVATE KEY-----), the following command will convert it to PKCS #1 format, move the original to nifi-key-pkcs8.key, and rename the PKCS #1 version as nifi-key.key:

      • openssl rsa -in nifi-key.key -out nifi-key-pkcs1.key && mv nifi-key.key nifi-key-pkcs8.key && mv nifi-key-pkcs1.key nifi-key.key

Signing with Externally-signed CA Certificates

To sign generated certificates with a certificate authority (CA) generated outside of the TLS Toolkit, ensure the necessary files are in the right format and location (see above). For example, an organization Large Organization has an internal CA (CN=ca.large.org, OU=Certificate Authority). This root CA is offline and only used to sign other internal CAs. The Large IT team generates an intermediate CA (CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority) to be used to sign all NiFi node certificates (CN=node1.nifi.large.org, OU=NiFi, CN=node2.nifi.large.org, OU=NiFi, etc.).

To use the toolkit to generate these certificates and sign them using the intermediate CA, ensure that the following files are present:

  • nifi-cert.pem - the public certificate of the intermediate CA in PEM format

  • nifi-key.key - the Base64-encoded private key of the intermediate CA in PKCS #1 PEM format

If the intermediate CA was the root CA, it would be self-signed - the signature over the certificate would be issued from the same key. In that case (the same as a toolkit-generated CA), no additional arguments are necessary. However, because the intermediate CA is signed by the root CA, the public certificate of the root CA needs to be provided as well to validate the signature. The --additionalCACertificate parameter is used to specify the path to the signing public certificate. The value should be the absolute path to the root CA public certificate.

Example:


            # Generate cert signed by intermediate CA (which is signed by root CA) -- WILL FAIL

$ ./bin/tls-toolkit.sh standalone -n 'node1.nifi.apache.org' \
-P passwordpassword \
-S passwordpassword \
-o /opt/certs/externalCA \
-O

2018/08/02 18:48:11 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandaloneCommandLine: No nifiPropertiesFile specified, using embedded one.
2018/08/02 18:48:12 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: Running standalone certificate generation with output directory /opt/certs/externalCA
2018/08/02 18:48:12 INFO [main] org.apache.nifi.toolkit.tls.util.TlsHelper: Verifying the certificate signature for CN=nifi_ca.large.org, OU=Certificate Authority
2018/08/02 18:48:12 INFO [main] org.apache.nifi.toolkit.tls.util.TlsHelper: Attempting to verify certificate CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority signature with CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority
2018/08/02 18:48:12 WARN [main] org.apache.nifi.toolkit.tls.util.TlsHelper: Certificate CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority not signed by CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority [certificate does not verify with supplied key]
Error generating TLS configuration. (The signing certificate was not signed by any known certificates)

# Provide additional CA certificate path for signature verification of intermediate CA

$ ./bin/tls-toolkit.sh standalone -n 'node1.nifi.apache.org' \
-P passwordpassword \
-S passwordpassword \
-o /opt/certs/externalCA \
--additionalCACertificate /opt/certs/externalCA/root.pem \
-O

2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandaloneCommandLine: No nifiPropertiesFile specified, using embedded one.
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: Running standalone certificate generation with output directory /opt/certs/externalCA
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.util.TlsHelper: Verifying the certificate signature for CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.util.TlsHelper: Attempting to verify certificate CN=nifi_ca.large.org, OU=NiFi, OU=Certificate Authority signature with CN=ca.large.org, OU=Certificate Authority
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.util.TlsHelper: Certificate was signed by CN=ca.large.org, OU=Certificate Authority
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: Using existing CA certificate /opt/certs/externalCA/nifi-cert.pem and key /opt/certs/externalCA/nifi-key.key
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: Writing new ssl configuration to /opt/certs/externalCA/node1.nifi.apache.org
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: Successfully generated TLS configuration for node1.nifi.apache.org 1 in /opt/certs/externalCA/node1.nifi.apache.org
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: No clientCertDn specified, not generating any client certificates.
2018/08/02 18:48:44 INFO [main] org.apache.nifi.toolkit.tls.standalone.TlsToolkitStandalone: tls-toolkit standalone completed successfully
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