ECDH loads parameters as signed

[Ján Jančár]

On 31/10/2018 12:10, Ján Jančár wrote:
> 
> 
> On 31/10/2018 00:32, Ján Jančár wrote:
>>
>>
>> On 29/10/2018 17:44, Werner Koch wrote:
>>> On Mon, 29 Oct 2018 15:41, jancar.jj at gmail.com said:
>>>
>>>> Any updates on this? Such exporting and loading parameters back should
>>>> work. The same problem appears in ECDSA.
>>>
>>> I considered to include this in 1.8.4 but given that I have seen no
>>> further comments your patch first needs closer investigations.  We need
>>> to check the history to see why the code was written this way.  Even if
>>> your issue is a bug (in the sense of a wrong/different implementation)
>>> we can't simply change it and risk that other applications break.
>>
>> The use of sexp_extract_param with the signed prefix was introduced in
>> 6bd5d18c, which moved the sexp parsing from gcry_pk_encrypt to
>> ecc_encrypt_raw. Previously the keyparams S-exp was parsed using a loop and:
>>
>> gcry_sexp_nth_mpi (list, 1, GCRYMPI_FMT_STD);
>>
>> as in 6bd5d18c: cipher/pubkey.c (sexp_elements_extract_ecc).
>>
>> However, before 6bd5d18c, which introduced eddsa, this was done using:
> 
> Sorry, the eddsa introduction should have been commit 63cd34744,
> mis-copied the id.

Hi all,
Any news on this? It has been a month. My rationale is further explained in:

https://lists.gnupg.org/pipermail/gcrypt-devel/2018-October/004574.html

Cheers,
Ján Jančár

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