shoney.arickathil
ac52c3fdb5
- hand-rolled ChaCha20 + poly1305-donna-32 + RFC 8439 §2.8 AEAD in crypto.c; constant-time (add/xor/rotate + limb math, no tables, no data-dep branches), constant-time tag compare - two bare-name crypto-family builtins beside sha256/hmac: chacha20poly1305_seal(key,nonce,aad,pt) -> Bytes (ct||tag) chacha20poly1305_open(key,nonce,aad,ct||tag) -> ?Bytes (nil on auth fail) key 32B, nonce 12B (caller-supplied, per TLS's per-record nonce need) - wiring: wob.h enum + WO_B_MAX 112; builtin.c crypto dispatch range; loader.c arity 4; emit.ml (ids, arity_of 4-case, return type, is_builtin_name, name->id); types.ml (registration + return type) - VERIFIED: matches RFC 8439 §2.8.2 byte-for-byte (vs python cryptography + the RFC vector); test_crypto 24/0 (Poly1305 §2.5.2 + AEAD seal/open/tamper); ASan/UBSan clean; runtime battery + compiler 557/0 green - first rung of the TLS ladder (rv2 9 phase A) (cherry picked from commit 961854a8f4e9e632b6fa17f7f2e519e2d08f4936)
178 lines
7 KiB
C
178 lines
7 KiB
C
/* test_crypto — the digest cores against published vectors: SHA-1 (RFC
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* 3174), SHA-256 (FIPS 180-4), HMAC-SHA256 (RFC 4231 cases 1-4), plus a
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* 63/64/65-byte block-boundary sweep. Boundary constants precomputed with
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* python3: hashlib.sha256(b"a"*63).hexdigest() etc. */
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#include <stdio.h>
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#include <string.h>
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#include "crypto.h"
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#include "t.h"
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static void hex(const uint8_t *d, size_t n, char *out) {
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static const char *h = "0123456789abcdef";
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for (size_t i = 0; i < n; i++) {
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out[i * 2] = h[d[i] >> 4];
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out[i * 2 + 1] = h[d[i] & 15];
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}
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out[n * 2] = 0;
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}
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static void t_sha1(const char *msg, size_t len, const char *want) {
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uint8_t d[20];
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char got[41];
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wo_sha1((const uint8_t *)msg, len, d);
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hex(d, 20, got);
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T_CHECK(strcmp(got, want) == 0);
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}
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static void t_sha256(const char *msg, size_t len, const char *want) {
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uint8_t d[32];
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char got[65];
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wo_sha256((const uint8_t *)msg, len, d);
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hex(d, 32, got);
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T_CHECK(strcmp(got, want) == 0);
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}
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static void t_hmac(const uint8_t *key, size_t klen, const char *msg,
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size_t mlen, const char *want) {
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uint8_t d[32];
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char got[65];
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wo_hmac_sha256(key, klen, (const uint8_t *)msg, mlen, d);
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hex(d, 32, got);
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T_CHECK(strcmp(got, want) == 0);
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}
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/* rv2 8 phase A: ChaCha20-Poly1305 (RFC 8439 §2.5.2 Poly1305 + §2.8.2 AEAD) */
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static void t_poly1305(const uint8_t key[32], const char *msg, size_t mlen,
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const char *want) {
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uint8_t tag[16];
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char got[33];
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wo_poly1305(key, (const uint8_t *)msg, mlen, tag);
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hex(tag, 16, got);
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T_CHECK(strcmp(got, want) == 0);
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}
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int main(void) {
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/* RFC 3174 */
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t_sha1("abc", 3, "a9993e364706816aba3e25717850c26c9cd0d89d");
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t_sha1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
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"84983e441c3bd26ebaae4aa1f95129e5e54670f1");
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t_sha1("", 0, "da39a3ee5e6b4b0d3255bfef95601890afd80709");
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/* the WebSocket handshake's exact input (RFC 6455 §1.3 worked example):
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* sha1("dGhlIHNhbXBsZSBub25jZQ==258EAFA5-E914-47DA-95CA-C5AB0DC85B11") */
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t_sha1("dGhlIHNhbXBsZSBub25jZQ==258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 60,
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"b37a4f2cc0624f1690f64606cf385945b2bec4ea");
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/* FIPS 180-4 */
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t_sha256("abc", 3,
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"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad");
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t_sha256("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
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"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1");
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t_sha256("", 0,
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"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
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/* block boundaries: python3 -c 'import hashlib
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[print(hashlib.sha256(b"a"*n).hexdigest()) for n in (63,64,65)]' */
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char a65[65];
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memset(a65, 'a', 65);
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t_sha256(a65, 63,
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"7d3e74a05d7db15bce4ad9ec0658ea98e3f06eeecf16b4c6fff2da457ddc2f34");
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t_sha256(a65, 64,
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"ffe054fe7ae0cb6dc65c3af9b61d5209f439851db43d0ba5997337df154668eb");
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t_sha256(a65, 65,
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"635361c48bb9eab14198e76ea8ab7f1a41685d6ad62aa9146d301d4f17eb0ae0");
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/* same sweep for sha1: hashlib.sha1 */
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t_sha1(a65, 63, "03f09f5b158a7a8cdad920bddc29b81c18a551f5");
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t_sha1(a65, 64, "0098ba824b5c16427bd7a1122a5a442a25ec644d");
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t_sha1(a65, 65, "11655326c708d70319be2610e8a57d9a5b959d3b");
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/* RFC 4231 */
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{
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uint8_t k1[20];
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memset(k1, 0x0b, 20);
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t_hmac(k1, 20, "Hi There", 8,
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"b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7");
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}
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t_hmac((const uint8_t *)"Jefe", 4, "what do ya want for nothing?", 28,
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"5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843");
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{
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uint8_t k3[20], m3[50];
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memset(k3, 0xaa, 20);
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memset(m3, 0xdd, 50);
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t_hmac(k3, 20, (const char *)m3, 50,
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"773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe");
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}
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{
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uint8_t k4[25], m4[50];
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for (int i = 0; i < 25; i++) k4[i] = (uint8_t)(i + 1);
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memset(m4, 0xcd, 50);
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t_hmac(k4, 25, (const char *)m4, 50,
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"82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b");
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}
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/* long-key path (key > 64 bytes is hashed first): RFC 4231 case 6 */
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{
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uint8_t k6[131];
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memset(k6, 0xaa, 131);
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t_hmac(k6, 131, "Test Using Larger Than Block-Size Key - Hash Key First",
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54,
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"60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54");
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}
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/* RFC 8439 §2.5.2 — Poly1305 */
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{
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uint8_t pk[32];
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for (int i = 0; i < 32; i++) pk[i] = 0;
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static const uint8_t pkv[32] = {
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0x85, 0xd6, 0xbe, 0x78, 0x57, 0x55, 0x6d, 0x33, 0x7f, 0x44, 0x52,
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0xfe, 0x42, 0xd5, 0x06, 0xa8, 0x01, 0x03, 0x80, 0x8a, 0xfb, 0x0d,
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0xb2, 0xfd, 0x4a, 0xbf, 0xf6, 0xaf, 0x41, 0x49, 0xf5, 0x1b };
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memcpy(pk, pkv, 32);
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t_poly1305(pk, "Cryptographic Forum Research Group", 34,
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"a8061dc1305136c6c22b8baf0c0127a9");
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}
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/* RFC 8439 §2.8.2 — ChaCha20-Poly1305 AEAD: seal matches the vector,
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* open round-trips, and a tampered tag is rejected. */
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{
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uint8_t key[32], nonce[12], aad[12];
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for (int i = 0; i < 32; i++) key[i] = (uint8_t)(0x80 + i);
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static const uint8_t nv[12] = { 0x07, 0x00, 0x00, 0x00, 0x40, 0x41,
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0x42, 0x43, 0x44, 0x45, 0x46, 0x47 };
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static const uint8_t av[12] = { 0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1,
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0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7 };
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memcpy(nonce, nv, 12);
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memcpy(aad, av, 12);
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const char *pt =
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"Ladies and Gentlemen of the class of '99: If I could offer you "
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"only one tip for the future, sunscreen would be it.";
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size_t ptlen = strlen(pt);
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uint8_t out[114 + 16];
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int rc = wo_chacha20poly1305_seal(key, nonce, aad, 12,
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(const uint8_t *)pt, ptlen, out);
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T_CHECK(rc == 0);
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char got[(114 + 16) * 2 + 1];
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hex(out, ptlen + 16, got);
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T_CHECK(strcmp(got,
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"d31a8d34648e60db7b86afbc53ef7ec2a4aded51296e08fea9e2b5a736ee62d6"
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"3dbea45e8ca9671282fafb69da92728b1a71de0a9e060b2905d6a5b67ecd3b36"
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"92ddbd7f2d778b8c9803aee328091b58fab324e4fad675945585808b4831d7bc"
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"3ff4def08e4b7a9de576d26586cec64b61161ae10b594f09e26a7e902ecbd060"
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"0691") == 0);
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uint8_t back[114];
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rc = wo_chacha20poly1305_open(key, nonce, aad, 12, out, ptlen,
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out + ptlen, back);
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T_CHECK(rc == 0);
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T_CHECK(memcmp(back, pt, ptlen) == 0);
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/* flip one tag bit — must be rejected (rc == 1), not decrypted */
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uint8_t tampered[16];
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memcpy(tampered, out + ptlen, 16);
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tampered[0] ^= 0x01;
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rc = wo_chacha20poly1305_open(key, nonce, aad, 12, out, ptlen,
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tampered, back);
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T_CHECK(rc == 1);
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}
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return t_report("test_crypto");
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}
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