frost/secp256k1-zkp
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Expose ability to deep-copy a context

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This commit is contained in:
Andrew Poelstra
2015-04-11 14:06:54 -05:00
parent 3608c7f2f6
commit d899b5b67c
7 changed files with 91 additions and 0 deletions
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20
src/ecmult_impl.h
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@@ -131,6 +131,26 @@ static void secp256k1_ecmult_context_build(secp256k1_ecmult_context_t *ctx) {
#endif
}
static void secp256k1_ecmult_context_clone(secp256k1_ecmult_context_t *dst,
const secp256k1_ecmult_context_t *src) {
if (src->pre_g == NULL) {
dst->pre_g = NULL;
} else {
size_t size = sizeof((*dst->pre_g)[0]) * ECMULT_TABLE_SIZE(WINDOW_G);
dst->pre_g = (secp256k1_ge_storage_t (*)[])checked_malloc(size);
memcpy(dst->pre_g, src->pre_g, size);
}
#ifdef USE_ENDOMORPHISM
if (src->pre_g_128 == NULL) {
dst->pre_g_128 = NULL;
} else {
size_t size = sizeof((*dst->pre_g_128)[0]) * ECMULT_TABLE_SIZE(WINDOW_G);
dst->pre_g_128 = (secp256k1_ge_storage_t (*)[])checked_malloc(size);
memcpy(dst->pre_g_128, src->pre_g_128, size);
}
#endif
}
static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context_t *ctx) {
return ctx->pre_g != NULL;
}