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Get parameter hashes from the user, rather than supplying it ourselves.

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This commit is contained in:
Sean Bowe
2018-08-02 12:11:32 -06:00
parent d4ee94c692
commit 48c2d3c8da
2 changed files with 25 additions and 8 deletions
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5
include/librustzcash.h
View File

@@ -20,8 +20,11 @@ extern "C" {
/// paths as necessary. Only called once.
void librustzcash_init_zksnark_params(
const char* spend_path,
const char* spend_hash,
const char* output_path,
const char* sprout_path
const char* output_hash,
const char* sprout_path,
const char* sprout_hash
);
/// Validates the provided Equihash solution against

28
src/rustzcash.rs
View File

@@ -6,10 +6,6 @@ extern crate pairing;
extern crate rand;
extern crate sapling_crypto;
const SPROUT_GROTH16_PARAMS_HASH: &'static str = "7a6723311162cb0c664c742d2fa42278195ade98ba3f21ef4fa02b82c83aed696e107e389ac7b3b0f33f417aeefe5be775d117910a473a422b4a1b97489fbdd6";
const SAPLING_SPEND_PARAMS_HASH: &'static str = "35f6afd7d7514531aaa9fa529bdcddf116865f02abdd42164322bb1949227d82bdae295cad9c7b98d4bbbb00e045fa17aca79c90f53433a66bce4e82b6a1936d";
const SAPLING_OUTPUT_PARAMS_HASH: &'static str = "f9d0b98ea51830c4974878f1b32bb68b2bf530e2e0ae09cd2a9b609d6fda37f1a1928e2d1ca91c31835c75dcc16057db53a807cc5cb37ebcfb753aa843a8ac21";
mod hashreader;
#[macro_use]
@@ -116,12 +112,30 @@ fn fixed_scalar_mult(from: &[u8], p_g: FixedGenerators) -> edwards::Point<Bls12,
#[no_mangle]
pub extern "system" fn librustzcash_init_zksnark_params(
spend_path: *const c_char,
spend_hash: *const c_char,
output_path: *const c_char,
output_hash: *const c_char,
sprout_path: *const c_char,
sprout_hash: *const c_char,
) {
// Initialize jubjub parameters here
lazy_static::initialize(&JUBJUB);
let spend_hash = unsafe { CStr::from_ptr(spend_hash) }
.to_str()
.expect("hash should be a valid string")
.to_string();
let output_hash = unsafe { CStr::from_ptr(output_hash) }
.to_str()
.expect("hash should be a valid string")
.to_string();
let sprout_hash = unsafe { CStr::from_ptr(sprout_hash) }
.to_str()
.expect("hash should be a valid string")
.to_string();
// These should be valid CStr's, but the decoding may fail on Windows
// so we may need to use OSStr or something.
let spend_path = unsafe { CStr::from_ptr(spend_path) }
@@ -172,15 +186,15 @@ pub extern "system" fn librustzcash_init_zksnark_params(
io::copy(&mut sprout_fs, &mut sink)
.expect("couldn't finish reading Sprout groth16 parameter file");
if &*spend_fs.into_hash() != SAPLING_SPEND_PARAMS_HASH {
if spend_fs.into_hash() != spend_hash {
panic!("Sapling spend parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
}
if &*output_fs.into_hash() != SAPLING_OUTPUT_PARAMS_HASH {
if output_fs.into_hash() != output_hash {
panic!("Sapling output parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
}
if &*sprout_fs.into_hash() != SPROUT_GROTH16_PARAMS_HASH {
if sprout_fs.into_hash() != sprout_hash {
panic!("Sprout groth16 parameter file is not correct, please clean your `~/.zcash-params/` and re-run `fetch-params`.");
}