Setting the update in my init() revealed other problems but I think I can work around them.
In EVP_MD_CTX_copy_ex() it copies the entire source EVP_MD_CTX to destination with this line: memcpy(out,in,sizeof *out); Then it later calls out->digest->copy(out,in); When It gets to my copy() callback both source and destination have the same md_data pointer. So I am going to have to assume that the destination md_data pointer is actually garbage and ignore it. It's going to take me some time to modify all my engine's digest implementations and fully test this. -- Robert Dugal Senior Software Developer Certicom Corp. A Subsidiary of Research In Motion [email protected] direct 905.501.3848 fax 905.507.4230 www.certicom.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dr. Stephen Henson Sent: Thursday, November 25, 2010 12:24 PM To: [email protected] Subject: Re: memory leak in HMAC_Final() when using my ENGINE On Thu, Nov 25, 2010, Robert Dugal wrote: > Doesn't work. Causes a segfault in EVP_DigestUpdate() because the ctx->update > pointer is NULL. > This is because without type->ctx_size being nonzero the update method is not > set in EVP_DigestInit_ex(). > See this code in EVP_DigestInit_ex() > Can you initialise it in your init() callback? Steve. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [email protected] Automated List Manager [email protected] --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [email protected] Automated List Manager [email protected]
