frost/secp256k1-zkp
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Add size constants for preallocated memory

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This commit is contained in:
Tim Ruffing
2018-10-22 16:23:09 +02:00
parent 1bf7c056ba
commit ef020de16f
5 changed files with 37 additions and 1 deletions
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18
src/secp256k1.c
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@@ -64,6 +64,24 @@ static const secp256k1_context secp256k1_context_no_precomp_ = {
};
const secp256k1_context *secp256k1_context_no_precomp = &secp256k1_context_no_precomp_;
size_t secp256k1_context_preallocated_size(unsigned int flags) {
size_t ret = ROUND_TO_ALIGN(sizeof(secp256k1_context));
if (EXPECT((flags & SECP256K1_FLAGS_TYPE_MASK) != SECP256K1_FLAGS_TYPE_CONTEXT, 0)) {
secp256k1_callback_call(&default_illegal_callback,
"Invalid flags");
return 0;
}
if (flags & SECP256K1_FLAGS_BIT_CONTEXT_SIGN) {
ret += SECP256K1_ECMULT_GEN_CONTEXT_PREALLOCATED_SIZE;
}
if (flags & SECP256K1_FLAGS_BIT_CONTEXT_VERIFY) {
ret += SECP256K1_ECMULT_CONTEXT_PREALLOCATED_SIZE;
}
return ret;
}
secp256k1_context* secp256k1_context_create(unsigned int flags) {
secp256k1_context* ret = (secp256k1_context*)checked_malloc(&default_error_callback, sizeof(secp256k1_context));
ret->illegal_callback = default_illegal_callback;