c++ - BAD_ACCESS (code=EXC_I386_GPFLT) when signing with ECDSA -

i trying use crypto++ on ios. downloaded prebuilt version of library marek kotewicz's github.

i struggling hard run this sample code crypto++ wiki.

ecdsa<ecp, cryptopp::sha256>::privatekey privatekey; ecdsa<ecp, cryptopp::sha256>::publickey publickey;  autoseededrandompool prng, rrng;  privatekey.initialize(prng, cryptopp::asn1::secp256k1());     privatekey.makepublickey(publickey);  string signature;        string message = "do or not. there no try.";  stringsource s(message, true,              new signerfilter(rrng,                               ecdsa<ecp, cryptopp::sha256>::signer(privatekey),                               new stringsink(signature))); 

its crashing following. showing in xcode output window:

bad_access (code=exc_i386_gpflt)   

this code snippet memory.h of c++ file pointing bad_access

 _libcpp_inline_visibility ~auto_ptr() throw() {delete __ptr_;} 

i getting bad_access(code=1 , address=0x0) error pointing line of code of library

 ->  0x1065dfa8d <+85>:  movq   -0x58(%rbp), %rdi 

its crashing following. showing in xcode output window:

bad_access(code=exc_i386_gpflt)   

the code looks ok me.

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i trying use crypto++ on ios. downloaded prebuilt version of library marek kotewicz's github.

i'm taking stab in dark. presumes code showed above really doing in, say, test viewcontroller.

the precompiled library appears using gnu's standard c++ library. switch llvm's standard c++ library building crypto++ -stdlib=c++ (and not gnu's -stdlib=stdc++). apple switched years ago, , xcode uses default.

you can find github fat library using llvm standard c++ @ noloader/cryptopp-5.6.2-ios.

or, can build fat library yourself. that, see ios (command line) on crypto++ wiki. prebuilt library @ cryptopp-5.6.2-ios uses instructions.

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autoseededrandompool prng, rrng; 

you need 1 of these.

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stringsource s(message, true,                new signerfilter(rrng,                    ecdsa<ecp, cryptopp::sha256>::signer(privatekey),                        new stringsink(signature))); 

over years, i've come wonder temporary signer created pipeline. i've changed crypto++ wiki stop using them. use code instead:

ecdsa<ecp, cryptopp::sha256>::privatekey privatekey; ... ecdsa<ecp, cryptopp::sha256>::signer signer(privatekey); ...  stringsource s(message, true,                new signerfilter(prng, signer,                    new stringsink(signature)));