Hello,
Try to disable RSA blinding with:
RSA_blinding_off(new_key);
before RSA_private_decrypt().
Best regards,
--
Marek Marcola <marek.marc...@malkom.pl>
owner-openssl-us...@openssl.org wrote on 02/24/2011 03:46:53 AM:
> "Shaheed Bacchus (sbacchus)" <sbacc...@cisco.com>
> Sent by: owner-openssl-us...@openssl.org
>
> 02/24/2011 03:52 AM
>
> Please respond to
> openssl-users@openssl.org
>
> To
>
> <openssl-users@openssl.org>
>
> cc
>
> Subject
>
> RSA_private_decrypt without e and d
>
> Hi,
> I have a situation where I have a message that has been encrypted via
> RSA_public_encrypt. On the receiving end I have the n, p, q, dmp1,
dmq1, and iqmp
> components (I know it might sound odd that I don’t have the e and d
components but that
> is the case). I’m trying to do something like:
>
> If (!(new_key = RSA_new()))
> return -1;
>
> new_key->n = BN_bin2bn(n_data, n_data_len, NULL);
> new_key->p = BN_bin2bn(p_data, p_data_len, NULL);
> new_key->q = BN_bin2bn(q_data, q_data_len, NULL);
> new_key->dmp1 = BN_bin2bn(dmp1_data, dmp1_data_len, NULL);
> new_key->dmq1 = BN_bin2bn(dmq1_data, dmq1_data_len, NULL);
> new_key->iqmp = BN_bin2bn(iqmp_data, iqmp1_data_len, NULL);
>
> resultDecrypt = RSA_private_decrypt(encrypted_size, encrypted,
decrypted, new_key,
> RSA_PKCS1_PADDING);
>
> This decrypt fails with
> error:0407106B:rsa routines:RSA_padding_check_PKCS1_type_2:block type is
not 02
>
> Supplying the correct e and d component causes it work properly, but I
will not have
> those under normal circumstances. Is there any way to do this without d
and e?
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