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Read ssh key with openssl command in CLI

How to read SSH key with OpenSSL CLI command?

Run the below command to find if the key is readable from the command line of the Linux server.

[email protected]:~# openssl pkey -in {path_to_any_private_key} -pubout -text

  • Refer below example of the readable key in the Linux server.

[email protected]:~# openssl pkey -in .ssh/id_rsa -pubout -text

-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
RSA Private-Key: (3072 bit, 2 primes)
modulus:
00:ca:ef:5c:d7:dd:be:a9:b0:20:e1:de:35:7e:08:
90:23:a1:d0:dc:05:6c:4c:8e:a4:06:e7:dc:b6:7d:
b6:58:78:d2:fd:69:6b:3a:0a:91:d7:91:dc:29:fd:
94:19:e5:a3:8e:80:57:fa:9c:7a:6d:a9:ff:55:96:
5b:0f:e1:0e:10:39:60:a0:b3:fd:ce:96:b2:ef:29:
90:23:cb:2c:76:a8:db:00:15:52:d9:10:c2:d4:b6:
60:f9:c4:81:d5:dd:0f:5f:1f:1b:7e:79:b7:2d:ca:
24:72:c5:0f:44:61:69:a0:70:8f:79:18:56:12:90:
6d:fa:b6:07:37:70:84:84:21:73:ad:c2:14:21:aa:
cf:03:26:65:1d:b9:22:04:9d:cc:2a:63:cf:5a:0a:
c4:ad:40:02:dc:ed:4f:ec:5c:7b:89:bc:d4:43:14:
44:49:55:14:03:a7:be:e6:08:25:77:7d:e2:1f:84:
9a:3c:71:59:3c:64:b3:88:ec:54:20:44:de:9e:62:
e1:7c:71:e0:5d:b5:91:80:c8:92:d2:10:14:c2:8d:
5a:fd:09:63:a8:b7:b3:a6:b5:dd:84:7d:fc:b1:51:
8c:b6:3c:a6:b2:1a:ca:88:df:a3:11:d8:70:49:c6:
a0:74:c8:96:88:50:a6:f5:c6:89:9e:d1:84:71:35:
78:b4:12:04:a9:06:4c:84:65:82:82:33:a1:fb:4c:
1f:a8:12:39:f7:52:b7:8a:be:f2:9a:75:3b:f9:1d:
d3:11:c3:f0:d7:21:88:40:01:f3:70:92:c0:d1:64:
3c:7c:5a:0c:23:3e:62:d3:f5:a2:14:e0:f0:1b:ef:
8c:7a:95:5f:fc:6c:7c:7a:bf:84:a1:96:2d:a7:fb:
3c:3d:17:c3:9b:12:09:17:43:5d:8f:f4:ec:23:46:
df:a0:69:76:0a:64:73:6d:75:5a:50:66:80:ba:b3:
af:ca:e9:0c:87:1a:60:45:e7:b0:24:4d:93:b0:3a:
48:3b:17:b1:45:e9:ac:18:13:e3
publicExponent: 65537 (0x10001)
privateExponent:
43:d2:91:b5:f7:7f:34:59:0f:f4:4c:fe:95:bb:a8:
e8:af:b9:0c:ff:a6:fd:43:22:e0:c7:f7:04:ea:a8:
d9:92:af:f9:4f:95:2d:95:c0:be:4a:1a:49:d2:5c:
ff:f6:b6:9d:f6:98:f0:c2:01:4c:cb:66:f1:a4:c9:
94:5a:04:08:3a:14:e8:40:9f:8f:be:df:d8:7c:8c:
96:d9:dd:67:5e:f1:aa:6a:76:00:e3:d0:29:a5:36:
6d:e3:55:fd:32:df:63:4c:13:35:46:da:88:ac:29:
58:4e:31:d7:09:b3:72:92:8b:f0:cd:c8:5e:75:f4:
bb:b8:c0:5a:af:f9:29:eb:c0:2c:8f:53:89:18:fc:
0c:b2:75:52:e4:bf:d0:c9:28:25:f6:ab:a3:0d:3c:
44:26:c3:8e:30:a5:e8:79:d4:33:e9:6f:0b:68:27:
96:56:9f:d4:c4:e8:51:1a:e1:e2:b8:a8:ad:1d:f5:
2a:44:3b:ad:aa:7e:32:41:c1:af:f3:33:d6:dc:c4:
b5:3c:32:64:51:c0:19:34:7b:cd:37:7b:73:8d:7a:
16:ab:51:81:3d:3f:e4:16:e6:36:2b:df:4b:a4:72:
c8:c9:b3:72:4e:87:94:4e:8c:ea:4b:d0:25:5c:e2:
c5:8e:00:bf:70:54:76:f8:21:24:bb:19:af:b0:7f:
1b:10:a9:c8:cf:83:38:12:3c:79:0f:40:9d:10:5b:
db:8a:bf:9a:70:fb:d0:46:7e:72:75:8e:08:e5:e5:
fd:39:b0:34:a2:e1:a5:29:6f:00:22:45:8d:c6:22:
6e:bb:20:e7:0a:05:87:da:9c:a2:ce:75:47:b4:4b:
c4:af:45:68:d5:e7:31:c1:8b:4e:87:f4:f4:a6:fe:
0e:cb:ec:37:a3:50:4b:2e:64:90:5a:03:a5:b4:b9:
5e:61:ce:8d:1b:5f:63:7f:a0:cb:ab:0a:df:42:9f:
18:60:1b:52:c3:b3:01:fc:c6:70:72:a3:8a:d8:4f:
c2:c4:00:21:ac:49:b6:60:99
prime1:
00:f7:a3:94:86:0d:33:8f:6b:81:eb:7f:38:69:c7:
09:b7:cd:f6:73:29:43:65:3b:09:03:f5:f8:0e:bb:
82:f5:4f:d5:b6:65:3c:e1:f1:5a:e9:6b:2a:aa:99:
96:60:dd:fe:10:95:41:ee:10:07:20:87:7a:22:85:
af:d6:ff:de:b2:e7:24:d9:8e:50:f0:a1:5d:74:b4:
8c:62:4c:d2:59:24:07:ad:ba:03:cd:a7:63:2c:83:
c6:24:40:4f:bb:1a:cd:4d:03:3a:a9:d9:9f:2f:14:
63:21:87:62:85:23:36:e7:e9:ff:6c:f0:fd:5a:84:
05:9c:7c:7f:b1:19:3d:20:15:b8:33:27:92:5d:1c:
4c:88:1c:53:4d:1c:f5:a8:b1:fa:c2:77:53:9b:30:
fc:f8:ed:87:76:2e:35:b7:ad:58:67:bf:bd:9c:a9:
db:91:7a:15:5b:75:2e:48:30:4d:67:1d:ea:10:c9:
51:75:09:37:5d:2f:b9:e8:92:32:9d:29:6d
prime2:
00:d1:c9:64:6e:85:c7:8d:aa:4e:4a:0b:74:37:bd:
ff:00:c7:58:3d:bf:59:e3:df:04:c7:d0:7a:59:ee:
07:e6:63:d7:68:3b:69:88:54:0d:2a:7b:21:3c:9c:
7a:4f:fb:e1:fa:e8:29:7e:0f:71:5b:c1:61:14:93:
31:20:50:6d:7d:90:80:95:66:55:6a:4d:cc:65:85:
6c:4b:75:c8:79:fe:46:fc:0a:5a:2b:d7:cb:5a:96:
88:cb:b0:e9:d1:09:68:30:c0:6f:2d:53:ef:4d:03:
c3:79:f0:3a:40:8c:97:60:a0:69:51:64:d4:41:fc:
fb:11:c3:72:0a:1e:56:f6:ce:f0:fa:68:e3:e0:f9:
54:89:0c:fc:ab:47:4a:37:b6:9b:0c:38:06:be:b3:
bc:1d:af:c9:86:4e:80:83:98:4d:5a:15:8a:fd:d1:
11:bc:f1:4c:3b:4f:7f:ba:2c:b5:85:cf:8d:e3:d1:
42:39:be:7b:7b:a0:19:3d:6d:c8:3f:b0:8f
exponent1:
00:c0:6c:0f:40:8a:89:81:eb:db:ac:0d:d2:db:fe:
99:02:85:bb:f6:88:1d:a2:4f:59:16:06:ce:95:44:
06:e2:6f:02:75:13:fd:56:e3:9f:ec:b8:25:13:22:
fc:c2:90:3c:96:ce:23:c8:c4:13:85:a7:3f:b4:0b:
85:32:de:e7:40:c4:72:d1:c9:d0:02:ea:a0:1f:cb:
1b:3a:56:cf:2c:0c:df:1a:92:eb:d9:a5:33:5e:a7:
96:13:1d:15:d7:21:60:5d:73:20:e6:51:ff:6b:29:
c0:4d:91:51:70:7a:88:73:74:53:d1:67:00:b6:90:
d7:7b:5d:12:2b:9e:9c:ec:8d:73:ef:eb:d3:c3:1d:
f6:29:dd:38:ad:36:cf:7c:21:af:e3:e3:ac:c7:6e:
2d:63:8f:ce:2e:7a:81:ab:13:bb:1a:02:d7:67:20:
65:48:89:40:87:2c:6a:a6:15:42:4f:d9:e2:c2:e0:
6b:b7:31:4e:1f:ce:b1:fa:91:7f:5a:b7:91
exponent2:
66:4a:e1:21:d3:31:9e:ae:30:46:82:97:44:a6:ec:
34:a0:ff:31:fc:a0:04:30:b6:d0:07:a3:e1:3d:e3:
b4:3f:72:c5:6c:52:e5:1a:b6:e0:c3:f1:4c:f0:af:
e3:58:5a:b4:51:88:09:e3:d5:ce:7b:d8:ae:83:a7:
2c:ae:8a:f4:f3:04:ff:d4:4a:49:ef:6d:7f:03:33:
ef:07:9b:9d:80:93:74:4a:47:f5:a0:df:93:68:5b:
83:96:dc:2c:05:7e:3c:67:58:ce:ad:62:be:16:db:
b6:15:a1:11:e0:7b:df:ad:d8:2c:cc:11:83:ab:ab:
70:d9:f0:3d:66:d5:d8:ba:c7:5e:12:cf:2a:df:e8:
8c:7b:3c:a8:f7:b6:04:bc:91:95:bf:ab:ea:49:11:
ad:18:0e:17:e3:27:5f:03:60:94:50:74:d9:96:9c:
23:99:35:26:a6:79:0d:7a:c7:78:5b:e0:3f:f9:c5:
65:0a:b0:83:73:69:5b:3e:b0:a9:fd:99
coefficient:
00:a9:4d:7c:f7:f0:55:1a:b8:16:9c:97:ef:46:5b:
fc:0f:61:bf:25:d7:e8:07:85:8d:a1:5e:e3:6a:fa:
2b:8b:56:ca:c9:a1:62:7c:fd:7e:ba:71:79:3b:3c:
52:df:40:70:26:c5:09:ef:2e:e6:c6:ec:b4:6e:77:
1e:6a:85:74:d8:de:b2:da:38:f2:b2:2c:45:03:f7:
b4:70:fb:42:f8:42:7c:f9:be:62:58:5f:28:74:f8:
cc:23:5f:dd:1a:52:23:43:d9:64:be:34:07:11:d3:
30:bf:ad:bb:5b:a4:1e:a4:0c:d0:9d:35:a7:b8:e8:
8c:39:7d:27:76:f0:cc:eb:80:43:0b:2a:9e:80:cd:
07:22:c0:8a:49:69:ea:56:80:c9:ed:58:09:86:36:
44:4e:56:36:19:78:5b:57:7f:d3:b5:c2:9e:04:96:
9d:34:8e:fb:9c:5a:05:3f:21:d4:fc:56:01:7d:6f:
6b:2e:12:8c:e7:85:04:af:7a:83:0f:60:3b

  • Refer below example of the non-readable key in the Linux server.

[email protected]:~# openssl pkey -in .ssh/id_dsa -pubout -text

unable to load key
139734109644096:error:0909006C:PEM routines:get_name:no start line:../crypto/pem/pem_lib.c:745:Expecting: ANY PRIVATE KEY