docs: Extending documentation and manpages
Refs: #1462
Change-Id: If33a0f3c623daf3502ed301bcdc63892779463e3
diff --git a/docs/manpages/ndnsec-cert-dump.rst b/docs/manpages/ndnsec-cert-dump.rst
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+ndnsec-cert-dump
+================
+
+``ndnsec-cert-dump`` is a tool to dump a certificate from **Public Info Base** or file and output
+it to standard output.
+
+Usage
+-----
+
+::
+
+ $ ndnsec-cert-dump [-h] [-p] [-ikf] name
+
+Description
+-----------
+
+``ndnsec-cert-dump`` can read a certificate from **Public Info Base (PIB)** or a file and output
+the certificate to standard output.
+
+By default, ``name`` is interpreted as a certificate name.
+
+Options
+-------
+
+``-i``
+ Interpret ``name`` as an identity name. If specified, the certificate to dump is the default
+ certificate of the identity.
+
+``-k``
+ Interpret ``name`` as a key name. If specified, the certificate to dump is the default certificate
+ of the key.
+
+``-f``
+ Interpret ``name`` as a path to a file containing the certificate. If ``name`` is ``-``,
+ certificate will be read from standard input.
+
+``-p``
+ Print out the certificate to a human-readable format.
+
+Examples
+--------
+
+Dump a certificate from PIB to standard output:
+::
+
+ $ ndnsec-cert-dump /ndn/test/KEY/david/ksk-1396913058196/ID-CERT/%00%00%01E%3E%9D%A0%DE
+
+Dump a certificate to a human-readable format:
+::
+
+ $ ndnsec-cert-dump -p /ndn/test/KEY/david/ksk-1396913058196/ID-CERT/%00%00%01E%3E%9D%A0%DE
+ Certificate name:
+ /ndn/test/KEY/david/ksk-1396913058196/ID-CERT/%00%00%01E%3E%9D%A0%DE
+ Validity:
+ NotBefore: 20140401T000000
+ NotAfter: 20150331T235959
+ Subject Description:
+ 2.5.4.41: David
+ 2.5.4.10: Some Organization
+ Public key bits:
+ MIIBIDANBgkqhkiG9w0BAQEFAAOCAQ0AMIIBCAKCAQEAtLq50tpynJ15zExEh9l6
+ jvh/HOmwhOppr/hTEPYUn2VTh21+JJIg5pHAAH/DQr8Bq5BGrdDUCIShxSxbaHwu
+ a1y4XgKP1MYBQP/WzcIhIzB/3PBDdmE0jM3Qg6yuk8BOwett3C07GtwW9dfgacwt
+ aC29xIHnYKfryH/gBSIDUIb38M7ILIDgQeIiQcHGHoFO8CbDtKY2OvVkFNgxowAR
+ Xn+gtkIfMdE77Z8p0S21pYfdvPuIpVVLy7lnFdwGzyCi3nmbtd/r9NSTepBczWQz
+ zBbThT7yfeNyHWLu0PZPdz84UpNPsBad3Bx9tT31noIVnt8yyBEfEU1jyEIVkm8U
+ VQIB