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Reduce size of precomputed signing table (ECMULT_GEN_PREC_BITS) for lowmemory

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Riccardo Casatta 2021-07-21 09:10:35 +02:00
parent 12e3c66bec
commit 505b04df49
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1 changed files with 3 additions and 2 deletions
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secp256k1-sys/build.rs
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@ -36,15 +36,16 @@ fn main() {
.define("ENABLE_MODULE_ECDH", Some("1")) .define("ENABLE_MODULE_ECDH", Some("1"))
.define("ENABLE_MODULE_SCHNORRSIG", Some("1")) .define("ENABLE_MODULE_SCHNORRSIG", Some("1"))
.define("ENABLE_MODULE_EXTRAKEYS", Some("1")) .define("ENABLE_MODULE_EXTRAKEYS", Some("1"))
.define("ECMULT_GEN_PREC_BITS", Some("4"))
// TODO these three should be changed to use libgmp, at least until secp PR 290 is merged // TODO these three should be changed to use libgmp, at least until secp PR 290 is merged
.define("USE_NUM_NONE", Some("1")) .define("USE_NUM_NONE", Some("1"))
.define("USE_FIELD_INV_BUILTIN", Some("1")) .define("USE_FIELD_INV_BUILTIN", Some("1"))
.define("USE_SCALAR_INV_BUILTIN", Some("1")); .define("USE_SCALAR_INV_BUILTIN", Some("1"));
if cfg!(feature = "lowmemory") { if cfg!(feature = "lowmemory") {
base_config.define("ECMULT_WINDOW_SIZE", Some("4")); // A low-enough value to consume neglible memory base_config.define("ECMULT_WINDOW_SIZE", Some("4")); // A low-enough value to consume negligible memory
base_config.define("ECMULT_GEN_PREC_BITS", Some("2"));
} else { } else {
base_config.define("ECMULT_GEN_PREC_BITS", Some("4"));
base_config.define("ECMULT_WINDOW_SIZE", Some("15")); // This is the default in the configure file (`auto`) base_config.define("ECMULT_WINDOW_SIZE", Some("15")); // This is the default in the configure file (`auto`)
} }
base_config.define("USE_EXTERNAL_DEFAULT_CALLBACKS", Some("1")); base_config.define("USE_EXTERNAL_DEFAULT_CALLBACKS", Some("1"));