On Fri, May 28, 2004, Thomas Schuerger wrote:

> Hi,
> 
> I have problems using the RSA_private_decrypt() function of the crypto
> library in parallel with *the same* (RSA *) structure. When using a
> single thread, decryption works flawlessly, when using two or more
> threads in parallel, decryption mostly fails with PKCS errors.
> 
> I thought the RSA structure would be accessed read-only so that this
> should be thread-safe.
> 

There are some montgomery parameters that are cached in the RSA structure when
it is first used. You need to set the appropriate locking callbacks to avoid a
race condition in a multithreaded environment.

> Any ideas how to solve this? Is there a function that duplicates an
> RSA structure so that I can duplicate it before using it?
> 

RSAPrivateKey_dup().

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
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