[openssl-dev] [openssl.org #4590] accessors without const return arguments

[Roumen Petrov via RT]

Hello,

Recently declaration of a number of get0 methods was changed to return 
constant values (BIGNUM).

Lets me quote description of an allocator "/ECDSA_SIG_new()/ allocates a 
new *ECDSA_SIG* structure (note: this function also allocates the 
BIGNUMs) and initialize it."

Now lets try to write deserialization of a ECDSA signature. With set 
method allocated and never user ECDSA members r and s has to be freed 
and replaced by new one. As result extra allocation of big numbers 
impact performance and increase memory usage.

Above is reason the request to remove const from return argument of get0 
methods.

The issue is not only for ECDSA but also for DSA_SIG and RSA, DSA, DH 
keys where situation is similar.


Regards,
Roumen Petrov



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Ticket here: http://rt.openssl.org/Ticket/Display.html?id=4590
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