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how can i generate a keypair without reading anwsers from stdin?

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zxq_yx_007 at 163

Aug 11, 2011, 11:41 PM

Post #1 of 5 (187 views)
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how can i generate a keypair without reading anwsers from stdin?

Hi there:
I want to generate a keypair . But i dont want to type "gpg --gen-key"
and then answer questions.
I want to write all the answers in a file and then let gpg read the
answer from the file in batch mode.
What the format of the file should be? Any help?

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wk at gnupg

Aug 12, 2011, 3:40 AM

Post #2 of 5 (180 views)
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Re: how can i generate a keypair without reading anwsers from stdin? [In reply to]

On Fri, 12 Aug 2011 08:41, zxq_yx_007 [at] 163 said:

> I want to write all the answers in a file and then let gpg read the
> answer from the file in batch mode.
> What the format of the file should be? Any help?

See the chapter "Unattended GPG key generation" in the manual, for
example online at

<http://gnupg.org/documentation/manuals/gnupg/Unattended-GPG-key-generation.html>

Shalom-Salam,

Werner

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lists at binarywings

Aug 12, 2011, 3:40 AM

Post #3 of 5 (180 views)
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Re: how can i generate a keypair without reading anwsers from stdin? [In reply to]

Am 12.08.2011 08:41, schrieb 赵小强:
> Hi there:
> I want to generate a keypair . But i dont want to type "gpg --gen-key"
> and then answer questions.
> I want to write all the answers in a file and then let gpg read the
> answer from the file in batch mode.
> What the format of the file should be? Any help?
>

You can simply write the answers down like you would in an interactive
session with gpg. Then feed this file with `gpg --gen-key ... < file`

gpg just reads from standard input. There is no difference between a
user pressing return and a newline character in a text file.

If you want to generate multiple key from one file, try something like
`while gpg --gen-key ...; do true; done < file`

Hope this helps,
Florian Philipp

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jerome at jeromebaum

Aug 12, 2011, 9:34 AM

Post #4 of 5 (181 views)
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Re: how can i generate a keypair without reading anwsers from stdin? [In reply to]

> You can simply write the answers down like you would in an interactive
> session with gpg. Then feed this file with `gpg --gen-key ... < file`
>
> gpg just reads from standard input. There is no difference between a
> user pressing return and a newline character in a text file.
>
> If you want to generate multiple key from one file, try something like
> `while gpg --gen-key ...; do true; done < file`

I certainly think the batch solution is more appropriate. The batch
interfaces will be more consistent across different gpg versions,
while the numbers/letters you enter at the prompt can quickly change
if different algorithms are supported in a new version etc.

So stick with the batch and with-colons interfaces whenever you can.
They are also easier to script -- computer-readable and all that.

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email jerome [at] jeromebaum
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PGP: 2C23 EBFF DF1A 840D 2351 F5F5 F25B A03F 2152 36DA
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wk at gnupg

Aug 13, 2011, 2:04 AM

Post #5 of 5 (180 views)
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Re: how can i generate a keypair without reading anwsers from stdin? [In reply to]

On Fri, 12 Aug 2011 12:40, lists [at] binarywings said:

> You can simply write the answers down like you would in an interactive
> session with gpg. Then feed this file with `gpg --gen-key ... < file`

*Don't do this* !

The interface presented there is for humans only and may change at any
time. In fact, it depends on certain options and has changed several
times in the past.

> gpg just reads from standard input. There is no difference between a
> user pressing return and a newline character in a text file.

There is one: gpg reads directly from the TTY unless you use --batch.
This allows the use of readline features and to disable echo during
passphrase entry.

Please use a parameter file as described in the manual. This is a well
defined interface and the way to control key generation.

Salam-Shalom,

Werner

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Die Gedanken sind frei. Ausnahmen regelt ein Bundesgesetz.

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