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crypto: use malloc instead of alloca
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80794b3114
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@ -36,18 +36,13 @@
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#include <memory>
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#include <boost/thread/mutex.hpp>
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#include <boost/thread/lock_guard.hpp>
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#include <boost/shared_ptr.hpp>
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#include "common/varint.h"
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#include "warnings.h"
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#include "crypto.h"
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#include "hash.h"
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#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__DragonFly__)
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#include <alloca.h>
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#else
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#include <stdlib.h>
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#endif
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namespace crypto {
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using std::abort;
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@ -411,7 +406,9 @@ POP_WARNINGS
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ge_p3 image_unp;
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ge_dsmp image_pre;
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ec_scalar sum, k, h;
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rs_comm *const buf = reinterpret_cast<rs_comm *>(alloca(rs_comm_size(pubs_count)));
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boost::shared_ptr<rs_comm> buf(reinterpret_cast<rs_comm *>(malloc(rs_comm_size(pubs_count))), free);
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if (!buf)
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abort();
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assert(sec_index < pubs_count);
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#if !defined(NDEBUG)
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{
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@ -459,7 +456,7 @@ POP_WARNINGS
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sc_add(&sum, &sum, &sig[i].c);
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}
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}
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hash_to_scalar(buf, rs_comm_size(pubs_count), h);
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hash_to_scalar(buf.get(), rs_comm_size(pubs_count), h);
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sc_sub(&sig[sec_index].c, &h, &sum);
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sc_mulsub(&sig[sec_index].r, &sig[sec_index].c, &sec, &k);
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}
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@ -471,7 +468,9 @@ POP_WARNINGS
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ge_p3 image_unp;
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ge_dsmp image_pre;
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ec_scalar sum, h;
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rs_comm *const buf = reinterpret_cast<rs_comm *>(alloca(rs_comm_size(pubs_count)));
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boost::shared_ptr<rs_comm> buf(reinterpret_cast<rs_comm *>(malloc(rs_comm_size(pubs_count))), free);
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if (!buf)
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return false;
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#if !defined(NDEBUG)
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for (i = 0; i < pubs_count; i++) {
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assert(check_key(*pubs[i]));
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@ -499,7 +498,7 @@ POP_WARNINGS
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ge_tobytes(&buf->ab[i].b, &tmp2);
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sc_add(&sum, &sum, &sig[i].c);
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}
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hash_to_scalar(buf, rs_comm_size(pubs_count), h);
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hash_to_scalar(buf.get(), rs_comm_size(pubs_count), h);
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sc_sub(&h, &h, &sum);
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return sc_isnonzero(&h) == 0;
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}
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