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c-kzg-4844
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Patch blst submodule sha

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dancoffman 2022-11-04 00:13:02 -07:00
parent 46fb7cc10b
commit f819fe1f20
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GPG Key ID: 47B1F53E36A9B3CC
9 changed files with 55 additions and 198 deletions
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1
.gitmodules vendored
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@ -1,3 +1,4 @@
[submodule "blst"]
path = blst
url = https://github.com/supranational/blst
ignore = dirty # because we apply a patch

1
bindings/node.js/Makefile
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@ -7,6 +7,7 @@ clean:
rm -f *.o
build: kzg.cxx kzg.ts package.json binding.gyp Makefile
cd ../../src; make lib
yarn node-gyp rebuild
test: build

7
bindings/node.js/README.md
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@ -23,6 +23,7 @@ This directory contains the code necessary to generate NodeJS bindings for C-KZG
Spec: https://github.com/ethereum/consensus-specs/blob/dev/specs/eip4844/polynomial-commitments.md
First,
`npm install -g yarn` if you don't have it.
Install the blst submodule
@ -48,3 +49,9 @@ After doing this once, you can re-build (if necessary) and re-run the tests with
```sh
make build test
```
After making changes, regenerate the distributable JS and type defs
```sh
make bundle
```

1
bindings/node.js/binding.gyp
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@ -17,7 +17,6 @@
],
"libraries": [
"<(module_root_dir)/c_kzg_4844.o",
"<(module_root_dir)/sha256.o",
"<(module_root_dir)/../../lib/libblst.a"
],
"dependencies": ["<!(node -p \"require('node-addon-api').gyp\")"],

31
blst_sha.patch Normal file
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@ -0,0 +1,31 @@
diff --git a/src/sha256.h b/src/sha256.h
index 77ddb6d..67ccf7a 100644
--- a/src/sha256.h
+++ b/src/sha256.h
@@ -49,7 +49,7 @@ static void sha256_init_h(unsigned int h[8])
h[7] = 0x5be0cd19U;
}
-static void sha256_init(SHA256_CTX *ctx)
+void sha256_init(SHA256_CTX *ctx)
{
sha256_init_h(ctx->h);
ctx->N = 0;
@@ -57,7 +57,7 @@ static void sha256_init(SHA256_CTX *ctx)
ctx->off = 0;
}
-static void sha256_update(SHA256_CTX *ctx, const void *_inp, size_t len)
+void sha256_update(SHA256_CTX *ctx, const void *_inp, size_t len)
{
size_t n;
const unsigned char *inp = _inp;
@@ -116,7 +116,7 @@ static void sha256_emit(unsigned char md[32], const unsigned int h[8])
}
#endif
-static void sha256_final(unsigned char md[32], SHA256_CTX *ctx)
+void sha256_final(unsigned char md[32], SHA256_CTX *ctx)
{
unsigned long long bits = ctx->N * 8;
size_t n = ctx->off;

5
src/Makefile
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@ -3,12 +3,13 @@ CFLAGS += -O2
blst:
cd ../blst; \
git apply < ../blst_sha.patch; \
./build.sh && \
cp libblst.a ../lib && \
cp bindings/*.h ../inc
c_kzg_4844.o: c_kzg_4844.c sha256.c Makefile
clang -Wall -I$(INCLUDE_DIRS) $(CFLAGS) -c c_kzg_4844.c sha256.c
c_kzg_4844.o: c_kzg_4844.c Makefile
clang -Wall -I$(INCLUDE_DIRS) $(CFLAGS) -c c_kzg_4844.c
lib: c_kzg_4844.o Makefile
cp *.o ../bindings/node.js

14
src/c_kzg_4844.c
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@ -15,7 +15,6 @@
*/
#include "c_kzg_4844.h"
#include "sha256.h"
#include <inttypes.h>
#include <stdlib.h>
@ -1042,11 +1041,22 @@ static C_KZG_RET compute_kzg_proof(KZGProof *out, const Polynomial p, const BLSF
return C_KZG_OK;
}
typedef struct {
unsigned int h[8];
unsigned long long N;
unsigned char buf[64];
size_t off;
} SHA256_CTX;
void sha256_init(SHA256_CTX *ctx);
void sha256_update(SHA256_CTX *ctx, const void *_inp, size_t len);
void sha256_final(unsigned char md[32], SHA256_CTX *ctx);
static void hash(uint8_t md[32], uint8_t input[], size_t n) {
SHA256_CTX ctx;
sha256_init(&ctx);
sha256_update(&ctx, input, n);
sha256_final(&ctx, md);
sha256_final(md, &ctx);
}
static C_KZG_RET hash_to_bytes(uint8_t out[32],

159
src/sha256.c
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@ -1,159 +0,0 @@
// https://github.com/B-Con/crypto-algorithms/blob/master/sha256.c
/*********************************************************************
* Filename: sha256.c
* Author: Brad Conte (brad AT bradconte.com)
* Copyright:
* Disclaimer: This code is presented "as is" without any guarantees.
* Details: Implementation of the SHA-256 hashing algorithm.
SHA-256 is one of the three algorithms in the SHA2
specification. The others, SHA-384 and SHA-512, are not
offered in this implementation.
Algorithm specification can be found here:
* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2withchangenotice.pdf
This implementation uses little endian byte order.
*********************************************************************/
/*************************** HEADER FILES ***************************/
#include <stdlib.h>
#include <memory.h>
#include "sha256.h"
/****************************** MACROS ******************************/
#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
/**************************** VARIABLES *****************************/
static const WORD k[64] = {
0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
};
/*********************** FUNCTION DEFINITIONS ***********************/
void sha256_transform(SHA256_CTX *ctx, const BYTE data[])
{
WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
for (i = 0, j = 0; i < 16; ++i, j += 4)
m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
for ( ; i < 64; ++i)
m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
a = ctx->state[0];
b = ctx->state[1];
c = ctx->state[2];
d = ctx->state[3];
e = ctx->state[4];
f = ctx->state[5];
g = ctx->state[6];
h = ctx->state[7];
for (i = 0; i < 64; ++i) {
t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
t2 = EP0(a) + MAJ(a,b,c);
h = g;
g = f;
f = e;
e = d + t1;
d = c;
c = b;
b = a;
a = t1 + t2;
}
ctx->state[0] += a;
ctx->state[1] += b;
ctx->state[2] += c;
ctx->state[3] += d;
ctx->state[4] += e;
ctx->state[5] += f;
ctx->state[6] += g;
ctx->state[7] += h;
}
void sha256_init(SHA256_CTX *ctx)
{
ctx->datalen = 0;
ctx->bitlen = 0;
ctx->state[0] = 0x6a09e667;
ctx->state[1] = 0xbb67ae85;
ctx->state[2] = 0x3c6ef372;
ctx->state[3] = 0xa54ff53a;
ctx->state[4] = 0x510e527f;
ctx->state[5] = 0x9b05688c;
ctx->state[6] = 0x1f83d9ab;
ctx->state[7] = 0x5be0cd19;
}
void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len)
{
WORD i;
for (i = 0; i < len; ++i) {
ctx->data[ctx->datalen] = data[i];
ctx->datalen++;
if (ctx->datalen == 64) {
sha256_transform(ctx, ctx->data);
ctx->bitlen += 512;
ctx->datalen = 0;
}
}
}
void sha256_final(SHA256_CTX *ctx, BYTE hash[])
{
WORD i;
i = ctx->datalen;
// Pad whatever data is left in the buffer.
if (ctx->datalen < 56) {
ctx->data[i++] = 0x80;
while (i < 56)
ctx->data[i++] = 0x00;
}
else {
ctx->data[i++] = 0x80;
while (i < 64)
ctx->data[i++] = 0x00;
sha256_transform(ctx, ctx->data);
memset(ctx->data, 0, 56);
}
// Append to the padding the total message's length in bits and transform.
ctx->bitlen += ctx->datalen * 8;
ctx->data[63] = ctx->bitlen;
ctx->data[62] = ctx->bitlen >> 8;
ctx->data[61] = ctx->bitlen >> 16;
ctx->data[60] = ctx->bitlen >> 24;
ctx->data[59] = ctx->bitlen >> 32;
ctx->data[58] = ctx->bitlen >> 40;
ctx->data[57] = ctx->bitlen >> 48;
ctx->data[56] = ctx->bitlen >> 56;
sha256_transform(ctx, ctx->data);
// Since this implementation uses little endian byte ordering and SHA uses big endian,
// reverse all the bytes when copying the final state to the output hash.
for (i = 0; i < 4; ++i) {
hash[i] = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
hash[i + 4] = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
hash[i + 8] = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
}
}

34
src/sha256.h
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@ -1,34 +0,0 @@
/*********************************************************************
* Filename: sha256.h
* Author: Brad Conte (brad AT bradconte.com)
* Copyright:
* Disclaimer: This code is presented "as is" without any guarantees.
* Details: Defines the API for the corresponding SHA1 implementation.
*********************************************************************/
#ifndef SHA256_H
#define SHA256_H
/*************************** HEADER FILES ***************************/
#include <stddef.h>
/****************************** MACROS ******************************/
#define SHA256_BLOCK_SIZE 32 // SHA256 outputs a 32 byte digest
/**************************** DATA TYPES ****************************/
typedef unsigned char BYTE; // 8-bit byte
typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines
typedef struct {
BYTE data[64];
WORD datalen;
unsigned long long bitlen;
WORD state[8];
} SHA256_CTX;
/*********************** FUNCTION DECLARATIONS **********************/
void sha256_init(SHA256_CTX *ctx);
void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len);
void sha256_final(SHA256_CTX *ctx, BYTE hash[]);
#endif // SHA256_H