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Created Import existing account key (markdown)

Lukas Schauer
2016-01-08 22:10:09 +01:00
parent 53c8d05e58
commit 5db6a6d9c9
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Import-existing-account-key.md Normal file

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If for any reason you want to import your existing account key from the official letsencrypt client place the following script next to `private_key.json` (should be in a subdirectory under `/etc/letsencrypt/accounts/acme-v01.api.letsencrypt.org/directory`) and run it.
It should return your private key in PEM format, which you can pipe directly into `private_key.pem`.
```perl
#!/usr/bin/env perl
use strict;
use Crypt::OpenSSL::RSA;
use Crypt::OpenSSL::Bignum;
use JSON;
use File::Slurp;
use MIME::Base64;
my $json_file = "private_key.json";
my $json_content = read_file($json_file);
$json_content =~ tr/-/+/;
$json_content =~ tr/_/\//;
my $json = decode_json($json_content);
my $n = Crypt::OpenSSL::Bignum->new_from_bin(decode_base64($json->{n}));
my $e = Crypt::OpenSSL::Bignum->new_from_bin(decode_base64($json->{e}));
my $d = Crypt::OpenSSL::Bignum->new_from_bin(decode_base64($json->{d}));
my $p = Crypt::OpenSSL::Bignum->new_from_bin(decode_base64($json->{p}));
my $q = Crypt::OpenSSL::Bignum->new_from_bin(decode_base64($json->{q}));
my $rsa = Crypt::OpenSSL::RSA->new_key_from_parameters($n, $e, $d, $p, $q);
print($rsa->get_private_key_string());
```