Federico,
You can either encode and decode CopyKey (i.e., call i2d followed by d2i) or increment
the rsa_st's references element using CRYPTO_add. For example:
CRYPTO_add (&CopyKey->references, 1, CRYPTO_LOCK_RSA);
See crypto/threads/mttest.c for setting up mutexes for a multithreaded application.
Frank
---------------------------------------- Message History
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From: Federico Sauter <[EMAIL PROTECTED]>@openssl.org on 06/04/2002 04:17 PM ZE2
Please respond to [EMAIL PROTECTED]
DELEGATED - Sent by: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
cc:
Subject: rsa_st copy function
Greetings!
I have been searching the OpenSSL headers for a copy function, which
would take a const pointer to a rsa_st structure and return another
pointer to a copy of it, but have not found any. My question is why
isn't there such a function? Are there any "tricks" in the copying
process of the mentioned struct? I wrote a function which reads:
RSA* RsaKeyCopy (const RSA* CopyKey)
{
// Allocate memory
RSA* retValue = RSA_new();
// The method pointer is copied as a reference, the rest will be
copied
// by value.
retValue->pad = CopyKey->pad;
retValue->version = CopyKey->version;
retValue->meth = CopyKey->meth;
if (!BN_copy(retValue->n, CopyKey->n))
return NULL;
if (!BN_copy(retValue->e, CopyKey->e))
return NULL;
if (!BN_copy(retValue->d, CopyKey->d))
return NULL;
if (!BN_copy(retValue->p, CopyKey->p))
return NULL;
if (!BN_copy(retValue->q, CopyKey->q))
return NULL;
if (!BN_copy(retValue->e, CopyKey->e))
return NULL;
if (!BN_copy(retValue->dmp1, CopyKey->dmp1))
return NULL;
if (!BN_copy(retValue->dmq1, CopyKey->dmq1))
return NULL;
if (!BN_copy(retValue->iqmp, CopyKey->iqmp))
return NULL;
retValue->references = CopyKey->references;
retValue->flags = CopyKey->flags;
retValue->bignum_data = NULL;
// These are cache values copied only to avoid possible trouble.
BN_MONT_CTX_copy(retValue->_method_mod_n, CopyKey->_method_mod_n);
BN_MONT_CTX_copy(retValue->_method_mod_p, CopyKey->_method_mod_p);
BN_MONT_CTX_copy(retValue->_method_mod_q, CopyKey->_method_mod_q);
// Copy the BN_BLINDING field
retValue->blinding->init = CopyKey->blinding->init;
if (!BN_copy(retValue->blinding->A, CopyKey->blinding->A))
return NULL;
if (!BN_copy(retValue->blinding->Ai, CopyKey->blinding->Ai))
return NULL;
if (!BN_copy(retValue->blinding->mod, CopyKey->blinding->mod))
return NULL;
// The CRYPTO_EX_DATA ex_data includes a stack, which will not be
copied
// here (and let's hope OpenSSL does the trick without it.)
return retValue;
}
My question is whether this should do a copy of the struct, or if there
is something (important) missing.
Thanks in advance for the help!
_____________________________________________________________
Federico Sauter [EMAIL PROTECTED]
Software Entwicklung Tel: +49 89 7465 4778
TESIS Sysware GmbH Fax: +49 89 7465 4788
Implerstraße 26 * D-81371 München * Deutschland
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