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To: hal@finney.org
From: Sven Wohlgemuth
Subject: Re: typo in rfc2440: secret key packet format
Cc: ietf-open-pgp@imc.org
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Hello,
now I see :-)
Thank you very much!
Regards,
Sven Wohlgemuth
At 9:49 Uhr -0700 30.07.1999, hal@finney.org wrote:
>Sven Wohlgemuth, , writes:
>> Has a string-to-key specifier to follow the specification of the symmetric
>> algorithm?
>
>It does, if there was a 255 and then the symmetric algorithm. It must
>not, if you just put in the symmetric algorithm and didn't put a 255
>first.
>
>> Since I can use the MD5 hash value of the passphrase as a symmetric key.
>> Why should I write
>> 255, 1
>> if I just want to use a symmetric algorithm without a s2k-specifier?
>
>You don't have to.
>
>>
>> >> - One octet indicating string-to-key usage conventions. 0
>> >> indicates that the secret key data is not encrypted. 255
>> >> indicates that a string-to-key specifier is being given. Any
>> ===
>> >> other value is a symmetric-key encryption algorithm specifier.
>> =============================================================
>> Isn't it possible to write
>> 1, enc_MPI, ...
>> 1 for the sym. algorithm follwed by the encrypted MPIs, instead?
>
>Almost. There needs to be an IV before the encrypted MPIs start.
>
>The idea is that there are three formats. Unencrypted looks like:
>
> 0, MPI, ...
>
>The simpler encrypted case is similar to your last suggestion:
>
> , , enc_MPI, ...
>
>This uses the default "simple" string-to-key conventions.
>
>The more complex one is:
>
> 255, , , , enc_MPI, ...
>
>This allows you to specify a different string to key specifier. That is
>the reason for the more complex format. The iterated/salted string-to-key
>is superior as it makes it harder to guess passphrases for someone who
>gets hold of the private key.
>
>Hal Finney
Sven Wohlgemuth, Department 14, Computer Science, University of
Saarbruecken, Germany, ,
PGP-Fingerprints:
RSA: 46C3 B9EB B21D EAAF 63C7 D667 F040 88A7
DSS: 56F0 55A2 4DF8 53C1 1E0E 52CB E196 5D18 894F 7C23
From owner-ietf-open-pgp@imc.org Fri Aug 13 14:22:37 1999
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From: "=?iso-8859-1?Q?Jorge_S=E1nchez_Arriazu?="
To:
Subject: Source code
Date: Fri, 13 Aug 1999 19:19:47 +0200
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Hello,
I'd like to be in touch with people who have worked with this code to
ask them some technical questions about how some functions work, about =
which
algorithms are used by PGP to do different things and about other stuff =
like
that.
Another question, is there any book or document discussing the source =
code of PGP in detail instead of just listing it? I've heard about a =
PGPsdk programmer's manual but I Can't download it from www.pgp.com =
because I'm in Spain (I haven't seen it in www.pgpi.com)
Jorge.
---------------------------------
Jorge S=E1nchez Arriazu
C/Jer=F3nimo Alcal=E1 Y=E1=F1ez, 6, 6=BAA, 30003-Murcia. Spain
Tel=E9fono: 00 34 968 220976
arriazu@iname.com
---------------------------------
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Hello,
I'd like to be in touch =
with people=20
who have worked with this code to
ask them some technical questions =
about how=20
some functions work, about which
algorithms are used by PGP to do =
different=20
things and about other stuff like
that.
Another question, is =
there any book=20
or document discussing the source code of PGP in detail instead of just =
listing=20
it? I've heard about a PGPsdk programmer's manual but I Can't download =
it from=20
www.pgp.com because I'm in Spain (I =
haven't=20
seen it in www.pgpi.com)
Jorge.
---------------------------------
Jorge S=E1nchez =
Arriazu
C/Jer=F3nimo=20
Alcal=E1 Y=E1=F1ez, 6, 6=BAA, 30003-Murcia. Spain
Tel=E9fono: 00 34 =
968 220976
arriazu@iname.com
--------------=
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6, 6=3DBAA=3D0D=3D0AMurcia, Murcia 30003=3D0D=3D0AEspa=3DF1a
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