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c-kzg-4844
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Add bytes32_from_hex helper function (#103)

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Justin Traglia 2023-01-31 16:48:41 +01:00 committed by GitHub
parent ea73c3f1ca
commit d3b061f84b
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 30 additions and 49 deletions
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src/test_c_kzg_4844.c
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@ -59,6 +59,14 @@ static void get_rand_g1_bytes(Bytes48 *out) {
ASSERT_EQUALS(ret, C_KZG_OK);
}
static void bytes32_from_hex(Bytes32 *out, const char *hex) {
int matches;
for (int i = 0; i < sizeof(Bytes32); i++) {
matches = sscanf(hex + i*2, "%2hhx", &out->bytes[i]);
ASSERT_EQUALS(matches, 1);
}
}
static void bytes48_from_hex(Bytes48 *out, const char *hex) {
int matches;
for (int i = 0; i < sizeof(Bytes48); i++) {
@ -75,24 +83,18 @@ static void test_blob_to_kzg_commitment__succeeds_x_less_than_modulus(void) {
C_KZG_RET ret;
KZGCommitment c;
Blob blob;
Bytes32 b;
/*
* A valid field element is x < BLS_MODULUS.
* Therefore, x = BLS_MODULUS - 1 should be valid.
*
* bls_modulus = 52435875175126190479447740508185965837690552500527637822603658699938581184513
* x = int(bls_modulus - 1).to_bytes(32, 'little')
* print("{" + ", ".join([f"0x{i:02x}" for i in x]) + "}")
* int(BLS_MODULUS - 1).to_bytes(32, 'little').hex()
*/
Bytes32 field_element = {
0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
0xfe, 0x5b, 0xfe, 0xff, 0x02, 0xa4, 0xbd, 0x53,
0x05, 0xd8, 0xa1, 0x09, 0x08, 0xd8, 0x39, 0x33,
0x48, 0x7d, 0x9d, 0x29, 0x53, 0xa7, 0xed, 0x73
};
bytes32_from_hex(&b, "00000000fffffffffe5bfeff02a4bd5305d8a10908d83933487d9d2953a7ed73");
memset(&blob, 0, sizeof(blob));
memcpy(blob.bytes, field_element.bytes, BYTES_PER_FIELD_ELEMENT);
memcpy(blob.bytes, b.bytes, BYTES_PER_FIELD_ELEMENT);
ret = blob_to_kzg_commitment(&c, &blob, &s);
ASSERT_EQUALS(ret, C_KZG_OK);
}
@ -101,24 +103,18 @@ static void test_blob_to_kzg_commitment__fails_x_equal_to_modulus(void) {
C_KZG_RET ret;
KZGCommitment c;
Blob blob;
Bytes32 b;
/*
* A valid field element is x < BLS_MODULUS.
* Therefore, x = BLS_MODULUS should be invalid.
*
* bls_modulus = 52435875175126190479447740508185965837690552500527637822603658699938581184513
* x = int(bls_modulus).to_bytes(32, 'little')
* print("{" + ", ".join([f"0x{i:02x}" for i in x]) + "}")
* int(BLS_MODULUS).to_bytes(32, 'little').hex()
*/
Bytes32 field_element = {
0x01, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
0xfe, 0x5b, 0xfe, 0xff, 0x02, 0xa4, 0xbd, 0x53,
0x05, 0xd8, 0xa1, 0x09, 0x08, 0xd8, 0x39, 0x33,
0x48, 0x7d, 0x9d, 0x29, 0x53, 0xa7, 0xed, 0x73
};
bytes32_from_hex(&b, "01000000fffffffffe5bfeff02a4bd5305d8a10908d83933487d9d2953a7ed73");
memset(&blob, 0, sizeof(blob));
memcpy(blob.bytes, field_element.bytes, BYTES_PER_FIELD_ELEMENT);
memcpy(blob.bytes, b.bytes, BYTES_PER_FIELD_ELEMENT);
ret = blob_to_kzg_commitment(&c, &blob, &s);
ASSERT_EQUALS(ret, C_KZG_BADARGS);
}
@ -127,24 +123,18 @@ static void test_blob_to_kzg_commitment__fails_x_greater_than_modulus(void) {
C_KZG_RET ret;
KZGCommitment c;
Blob blob;
Bytes32 b;
/*
* A valid field element is x < BLS_MODULUS.
* Therefore, x = BLS_MODULUS + 1 should be invalid.
*
* bls_modulus = 52435875175126190479447740508185965837690552500527637822603658699938581184513
* x = int(bls_modulus + 1).to_bytes(32, 'little')
* print("{" + ", ".join([f"0x{i:02x}" for i in x]) + "}")
* int(BLS_MODULUS + 1).to_bytes(32, 'little').hex()
*/
Bytes32 field_element = {
0x02, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
0xfe, 0x5b, 0xfe, 0xff, 0x02, 0xa4, 0xbd, 0x53,
0x05, 0xd8, 0xa1, 0x09, 0x08, 0xd8, 0x39, 0x33,
0x48, 0x7d, 0x9d, 0x29, 0x53, 0xa7, 0xed, 0x73
};
bytes32_from_hex(&b, "02000000fffffffffe5bfeff02a4bd5305d8a10908d83933487d9d2953a7ed73");
memset(&blob, 0, sizeof(blob));
memcpy(blob.bytes, field_element.bytes, BYTES_PER_FIELD_ELEMENT);
memcpy(blob.bytes, b.bytes, BYTES_PER_FIELD_ELEMENT);
ret = blob_to_kzg_commitment(&c, &blob, &s);
ASSERT_EQUALS(ret, C_KZG_BADARGS);
}
@ -153,6 +143,8 @@ static void test_blob_to_kzg_commitment__succeeds_point_at_infinity(void) {
C_KZG_RET ret;
KZGCommitment c;
Blob blob;
Bytes48 point_at_infinity;
int diff;
/*
* Get the commitment for a blob that's all zeros.
@ -164,15 +156,8 @@ static void test_blob_to_kzg_commitment__succeeds_point_at_infinity(void) {
/*
* The commitment should be the serialized point at infinity.
*/
Bytes48 point_at_infinity = {
0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
int diff = memcmp(c.bytes, point_at_infinity.bytes, BYTES_PER_COMMITMENT);
bytes48_from_hex(&point_at_infinity, "c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
diff = memcmp(c.bytes, point_at_infinity.bytes, BYTES_PER_COMMITMENT);
ASSERT_EQUALS(diff, 0);
}
@ -180,6 +165,8 @@ static void test_blob_to_kzg_commitment__succeeds_consistent_commitment(void) {
C_KZG_RET ret;
KZGCommitment c;
Blob blob;
Bytes48 expected_commitment;
int diff;
/*
* Get a commitment to a random blob.
@ -192,15 +179,8 @@ static void test_blob_to_kzg_commitment__succeeds_consistent_commitment(void) {
* We expect the commitment to match. If it doesn't
* match, something important has changed.
*/
Bytes48 expected_commitment = {
0xaf, 0x19, 0xe4, 0x60, 0x16, 0x9c, 0x57, 0x95,
0x9c, 0x04, 0x78, 0x6c, 0x95, 0x8e, 0x01, 0xf9,
0x84, 0xc1, 0x95, 0xbc, 0x56, 0xe9, 0x9b, 0x04,
0xc0, 0x7e, 0x0c, 0x97, 0x47, 0xe5, 0xdf, 0xa5,
0x66, 0xa4, 0x77, 0x1b, 0x8b, 0x13, 0x8c, 0xd8,
0xee, 0xd6, 0x7e, 0xfa, 0x81, 0x16, 0x56, 0x63
};
int diff = memcmp(c.bytes, expected_commitment.bytes, BYTES_PER_COMMITMENT);
bytes48_from_hex(&expected_commitment, "af19e460169c57959c04786c958e01f984c195bc56e99b04c07e0c9747e5dfa566a4771b8b138cd8eed67efa81165663");
diff = memcmp(c.bytes, expected_commitment.bytes, BYTES_PER_COMMITMENT);
ASSERT_EQUALS(diff, 0);
}
@ -212,13 +192,14 @@ static void test_validate_kzg_g1__succeeds_round_trip(void) {
C_KZG_RET ret;
Bytes48 a, b;
g1_t g1;
int diff;
get_rand_g1_bytes(&a);
ret = validate_kzg_g1(&g1, &a);
ASSERT_EQUALS(ret, C_KZG_OK);
bytes_from_g1(&b, &g1);
int diff = memcmp(a.bytes, b.bytes, sizeof(Bytes48));
diff = memcmp(a.bytes, b.bytes, sizeof(Bytes48));
ASSERT_EQUALS(diff, 0);
}