Checking What is in a Certificate Signing Request (CSR) Using OpenSSL

in cases where you need to send request to a Certifcate Authority (CA) to get a Certificate signed,
you will need to provide a Certifcate Signing Request (CSR).

And in some case you want to see the details of the CSR to more human friendly format to trobulshoot an problem.

We van use OPenSSL command to view the information about the CSR.

  openssl req -noout -text -in sample.csr

For example

Lets take a sample.csr

we can get information for the csr file via below commnad

$ : openssl req -noout -text -in tenderprog.csr 

Certificate Request:
    Data:
        Version: 1 (0x0)
        Subject: C=IN, ST=Karnataka, L=Bengaluru, O=tenderprod.com, OU=tender-security, CN=tenderprog.com, emailAddress=rakesh@tenderprog.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (4096 bit)
                Modulus:
                    00:e7:8b:08:45:54:05:7b:2c:e8:04:d7:7b:29:4d:
                    ce:d9:0e:1a:c8:c7:53:74:df:e7:44:ce:35:5d:1f:
                    11:b0:25:a1:b6:c2:d7:71:98:d6:18:98:b7:5f:0b:
                    3d:a0:81:f7:36:4b:2a:2e:fa:be:3e:d6:72:85:75:
                    53:28:ff:9d:32:05:f3:98:47:f7:9d:52:47:32:e0:
                    46:d5:dc:40:9f:b8:55:58:74:b0:98:a4:3d:fc:ab:
                    31:8e:30:84:53:af:7a:3b:a4:b4:38:4a:69:70:8d:
                    1b:46:cd:62:e9:71:dd:7b:46:27:c9:46:b9:56:b6:
                    de:f9:ce:48:02:46:6f:6d:59:61:e2:95:4a:74:15:
                    eb:98:20:fd:78:7e:1d:14:89:cb:57:35:61:80:33:
                    bc:e6:2a:64:c1:e4:da:e0:9a:41:01:4c:10:2f:bc:
                    29:ed:d7:d2:d6:c0:a0:57:8d:ae:93:f5:a4:b0:9b:
                    22:fa:8b:53:93:1c:c3:f1:b5:00:87:8c:23:63:ab:
                    da:f0:95:9e:86:d8:99:4a:6c:09:ba:5f:42:62:7d:
                    0b:a5:12:99:0e:45:2e:68:78:b8:03:24:f5:56:a4:
                    8b:74:d1:2d:7a:a3:7e:19:d7:6e:5d:87:51:d7:fd:
                    05:ef:12:6b:91:80:94:bc:7a:75:98:a8:bd:b3:d8:
                    33:d7:6e:15:f2:f4:01:7e:41:b3:82:88:9a:23:6c:
                    c7:13:30:e8:03:9e:5b:7a:88:1f:b3:6c:21:89:98:
                    6e:1a:7b:92:f3:61:7c:51:32:f1:bd:f4:a3:5a:1e:
                    c5:5d:73:83:6a:cf:0b:ce:05:e3:f7:e9:69:36:cf:
                    55:69:81:ee:1e:47:b3:b9:60:9b:59:3b:4f:4c:43:
                    87:9a:d8:a9:ac:6e:26:c3:89:9f:92:e7:14:ab:7a:
                    23:fb:d2:7e:f4:47:f2:d3:62:07:6e:f7:8b:20:08:
                    b7:d6:1e:5b:f7:ea:94:63:24:cd:76:9c:05:8f:fe:
                    6d:4e:77:7d:8c:82:00:fb:49:d6:18:c5:2b:3d:0b:
                    14:3b:df:66:36:50:81:88:9a:ff:d3:8e:0b:0d:2e:
                    1a:a8:d3:fb:46:cb:50:68:50:cd:8c:1b:57:01:bc:
                    3f:ad:71:22:a3:cf:37:30:eb:7a:99:7b:f4:e3:cb:
                    ba:f0:99:b5:9e:ee:f8:41:47:3e:b9:68:f5:15:e0:
                    24:51:1c:d0:cb:34:f7:4c:75:b0:03:40:42:16:81:
                    1f:ba:7b:6a:fe:b8:89:9c:8e:cc:c3:9c:a3:d6:16:
                    f9:e2:ab:7f:62:fe:4e:66:31:6e:c6:62:73:4e:7c:
                    e0:b7:77:a8:b4:58:8e:e4:a9:aa:1f:06:ae:f1:6a:
                    cd:1e:f7
                Exponent: 65537 (0x10001)
        Attributes:
            unstructuredName         :tenderprog
            Requested Extensions:
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        c7:63:18:b5:45:b0:a4:88:ef:b5:09:96:b6:2e:e4:f1:58:fe:
        25:9a:18:91:7a:61:c7:e9:98:89:cf:02:92:91:ed:1f:e8:f7:
        2f:75:fd:f2:12:12:e4:64:ba:96:09:2c:35:d6:c7:7f:be:98:
        8b:7e:53:be:f1:2f:a7:51:1a:0e:40:01:6f:7f:d3:32:c3:f8:
        0f:74:24:89:fa:72:10:f7:9c:93:93:b4:f8:6f:74:29:44:6e:
        99:db:a0:93:4e:af:2e:27:57:70:49:60:93:15:bd:0a:68:9b:
        58:1b:72:8a:be:a2:11:b4:3a:92:b6:3f:90:8f:2d:d6:8f:fa:
        a6:dd:15:1d:8b:15:b8:6c:b6:c8:a2:b6:d9:e4:10:10:64:9f:
        24:0d:96:05:c2:87:1c:ef:36:5c:24:64:3f:57:4a:e5:5a:29:
        9d:f6:91:ff:6d:b0:94:82:64:b4:f4:f8:da:82:77:7b:4d:08:
        2d:7b:9c:52:2d:15:34:dd:a8:dd:e5:2a:da:14:df:49:b5:32:
        4a:1d:0d:3c:ae:86:99:78:c7:b6:e6:54:f7:4b:3b:49:cc:2a:
        8b:ca:91:93:8a:89:0f:89:32:bc:f1:d1:c1:c5:1b:8e:0c:a3:
        88:5f:88:62:87:6a:76:e9:40:6f:e7:11:81:26:1b:bf:0a:c8:
        b5:47:69:e3:4b:5f:85:25:c9:1d:9a:39:3b:3d:d0:65:aa:e9:
        d5:55:ff:90:0e:7e:b1:50:61:5d:65:71:19:d5:69:fe:5f:96:
        fd:93:a5:24:2a:4e:7a:df:d9:5b:ca:90:44:54:33:98:5f:ab:
        a3:ab:eb:07:f0:cf:e3:32:c1:00:e4:9b:b6:20:fb:6c:cc:07:
        23:bd:10:30:bf:79:16:c1:8e:7e:05:b8:cd:6f:8c:46:65:ec:
        08:a7:3e:dc:5a:26:30:a9:07:49:e7:9d:7b:7c:2a:91:a2:6d:
        82:57:54:cf:6f:92:ca:3e:80:64:88:d8:d1:e1:56:94:99:cd:
        3e:80:d3:8c:25:6d:89:07:4c:0a:2e:f6:00:56:1a:de:71:12:
        fd:77:22:3a:0f:e9:02:dc:82:ec:8e:ba:99:e9:e1:f8:07:a1:
        b3:59:d3:c0:2c:9f:c3:00:1e:fd:ba:29:6b:b3:b9:fd:d3:7e:
        9d:9e:53:0e:5f:f4:b1:e0:c2:eb:61:2c:b4:11:54:11:73:b0:
        a9:95:8c:d8:a3:a0:0f:d3:66:d8:57:2a:26:f2:ad:05:0e:56:
        fa:8d:95:94:25:aa:74:83:09:cd:12:8d:26:ea:7d:ec:a8:f0:
        85:30:cb:ef:f6:6f:9d:2a:6c:8f:8e:0d:1c:33:d8:6c:55:da:
        be:4e:14:eb:ed:5c:76:7c