[1] OpenSSL ( (OpenSSL Foundation, Inc.著, )) https://www.openssl.org/docs/manmaster/apps/ocsp.html

[20] Format of file index.txt database of a CA - Google グループ ( ()) https://groups.google.com/forum/#!topic/mailing.openssl.users/gMRbePiuwV0

[2] Format of file index.txt database of a CA - Google グループ ( ()) https://groups.google.com/forum/#!topic/mailing.openssl.users/gMRbePiuwV0

The index.txt file is an ascii file consisting of 6 (not 4) tab-separated

fields.  Some of those fields may be empty and might appear not to exist at

all.

The 6 fields are:

0)  Entry type.  May be "V" (valid), "R" (revoked) or "E" (expired).

    Note that an expired may have the type "V" because the type has

    not been updated.  'openssl ca updatedb' does such an update.

1)  Expiration datetime.

2)  Revokation datetime.  This is set for any entry of the type "R".

3)  Serial number.

4)  File name of the certificate.  This doesn't seem to be used,

    ever, so it's always "unknown".

5)  Certificate subject name.

[3] 最終行であっても、行末の 0x0A は必須です。