On Wed, Apr 27, 2016, Jan Kohnert wrote: > Am Samstag, 23. April 2016, 03:57:55 schrieb Jan Kohnert: > > I have question regarding i2d_PKCS7_bio() in Version 1.0.1c, > 1.0.2g and > > maybe newer versions. > > [code skipped] > > Nobody any idea? Shall I compose a minimal compilable example > to make anyone able to dig this a little more? I still don't have a > clue what makes the function hang so long??? > Memory BIOs can be very inefficient when they contain a lot of data and it is read in small chunks: each read copies the remaining data to the start of the memory block. If your message uses indefinite length encoding that could well happen. If you read the data into a block of memory and call d2i_CMS_ContentInfo() on it you shouldn't get this problem. Alternatively if you have to use a memory BIO you can retrieve the pointer to the contained memory block using BIO_get_mem_data() and call d2i_CMS_ContentInfo() on the result. A third option of to make the BIO read only and call d2i_CMS_bio() on that: read only memory BIOs are handled more efficiently. Steve. -- Dr Stephen N. Henson. OpenSSL project core developer. Commercial tech support now available see: http://www.openssl.org
