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writeonce/runtime/test/test_crypto.c
shoney.arickathil 5f5d774d76 feat(crypto): X.509 chain-link verification (rv2 9 phase E core) 
- defensive ASN.1/DER reader: every length/bound checked; malformation
  is rejection, never over-read (truncated input KAT-gated)
- x509_parse: tbsCertificate span, sig-alg OID, signature,
  SubjectPublicKeyInfo (RSA n/e or EC P-256 x/y), validity dates
- wo_x509_verify_one: one chain link's signature, dispatching to
  phase-D RSA-PKCS1/PSS + ECDSA-P256 by the issuer key type
- wo_x509_parse_spki + wo_x509_check_validity (caller supplies time)
- KAT against real python-generated chains (test/gen_x509.py):
  RSA CA+leaf (SHA256withRSA), EC P-256 CA+leaf (ecdsa-with-SHA256);
  leaf-vs-CA, self-signed CA, wrong-issuer/tampered/truncated reject,
  validity window, SPKI extraction. test_crypto 84 pass, ASan/UBSan clean
- deferred to phase F: SAN/hostname match + multi-cert chain walk to a
  system CA bundle (both need the target host / trust store, known at
  handshake time)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
(cherry picked from commit 4ec1c75f889df3612e31b9a1a77c4c927fb546c1)
2026-09-15 01:15:31 +02:00

424 lines
20 KiB
C
Raw Blame History

/* test_crypto — the digest cores against published vectors: SHA-1 (RFC
* 3174), SHA-256 (FIPS 180-4), HMAC-SHA256 (RFC 4231 cases 1-4), plus a
* 63/64/65-byte block-boundary sweep. Boundary constants precomputed with
* python3: hashlib.sha256(b"a"*63).hexdigest() etc. */
#include <stdio.h>
#include <string.h>
#include "crypto.h"
#include "t.h"
#include "x509_vectors.h"
static void hex(const uint8_t *d, size_t n, char *out) {
static const char *h = "0123456789abcdef";
for (size_t i = 0; i < n; i++) {
out[i * 2] = h[d[i] >> 4];
out[i * 2 + 1] = h[d[i] & 15];
}
out[n * 2] = 0;
}
static void t_sha1(const char *msg, size_t len, const char *want) {
uint8_t d[20];
char got[41];
wo_sha1((const uint8_t *)msg, len, d);
hex(d, 20, got);
T_CHECK(strcmp(got, want) == 0);
}
static void t_sha256(const char *msg, size_t len, const char *want) {
uint8_t d[32];
char got[65];
wo_sha256((const uint8_t *)msg, len, d);
hex(d, 32, got);
T_CHECK(strcmp(got, want) == 0);
}
static void t_hmac(const uint8_t *key, size_t klen, const char *msg,
size_t mlen, const char *want) {
uint8_t d[32];
char got[65];
wo_hmac_sha256(key, klen, (const uint8_t *)msg, mlen, d);
hex(d, 32, got);
T_CHECK(strcmp(got, want) == 0);
}
/* rv2 8 phase A: ChaCha20-Poly1305 (RFC 8439 §2.5.2 Poly1305 + §2.8.2 AEAD) */
static void t_poly1305(const uint8_t key[32], const char *msg, size_t mlen,
const char *want) {
uint8_t tag[16];
char got[33];
wo_poly1305(key, (const uint8_t *)msg, mlen, tag);
hex(tag, 16, got);
T_CHECK(strcmp(got, want) == 0);
}
static void t_x25519(const char *kh, const char *uh, const char *wanth);
static size_t unhex(const char *h, uint8_t *out) {
size_t n = strlen(h) / 2;
for (size_t i = 0; i < n; i++) {
unsigned v;
sscanf(h + 2 * i, "%2x", &v);
out[i] = (uint8_t)v;
}
return n;
}
/* NIST SP 800-38D GCM test vector: seal matches ct||tag, open round-trips,
* a flipped tag is rejected. `cth` is the expected ciphertext concatenated
* with the 16-byte tag. */
static void t_aesgcm(const char *kh, const char *ih, const char *ah,
const char *ph, const char *cth) {
uint8_t key[32], iv[12], aad[64], pt[256], expect[272], out[272], back[256];
size_t klen = unhex(kh, key), alen = unhex(ah, aad);
unhex(ih, iv);
size_t plen = unhex(ph, pt), elen = unhex(cth, expect);
T_CHECK(elen == plen + 16);
T_CHECK(wo_aes_gcm_seal(key, klen, iv, aad, alen, pt, plen, out) == 0);
T_CHECK(memcmp(out, expect, plen + 16) == 0);
T_CHECK(wo_aes_gcm_open(key, klen, iv, aad, alen, out, plen, out + plen,
back) == 0);
T_CHECK(memcmp(back, pt, plen) == 0);
uint8_t bad[16];
memcpy(bad, out + plen, 16);
bad[0] ^= 0x01;
T_CHECK(wo_aes_gcm_open(key, klen, iv, aad, alen, out, plen, bad, back) == 1);
}
static void t_x25519(const char *kh, const char *uh, const char *wanth) {
uint8_t k[32], u[32], out[32];
char got[65];
unhex(kh, k); unhex(uh, u);
wo_x25519(out, k, u);
hex(out, 32, got);
T_CHECK(strcmp(got, wanth) == 0);
}
int main(void) {
/* RFC 3174 */
t_sha1("abc", 3, "a9993e364706816aba3e25717850c26c9cd0d89d");
t_sha1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
"84983e441c3bd26ebaae4aa1f95129e5e54670f1");
t_sha1("", 0, "da39a3ee5e6b4b0d3255bfef95601890afd80709");
/* the WebSocket handshake's exact input (RFC 6455 §1.3 worked example):
* sha1("dGhlIHNhbXBsZSBub25jZQ==258EAFA5-E914-47DA-95CA-C5AB0DC85B11") */
t_sha1("dGhlIHNhbXBsZSBub25jZQ==258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 60,
"b37a4f2cc0624f1690f64606cf385945b2bec4ea");
/* FIPS 180-4 */
t_sha256("abc", 3,
"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad");
t_sha256("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1");
t_sha256("", 0,
"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
/* block boundaries: python3 -c 'import hashlib
[print(hashlib.sha256(b"a"*n).hexdigest()) for n in (63,64,65)]' */
char a65[65];
memset(a65, 'a', 65);
t_sha256(a65, 63,
"7d3e74a05d7db15bce4ad9ec0658ea98e3f06eeecf16b4c6fff2da457ddc2f34");
t_sha256(a65, 64,
"ffe054fe7ae0cb6dc65c3af9b61d5209f439851db43d0ba5997337df154668eb");
t_sha256(a65, 65,
"635361c48bb9eab14198e76ea8ab7f1a41685d6ad62aa9146d301d4f17eb0ae0");
/* same sweep for sha1: hashlib.sha1 */
t_sha1(a65, 63, "03f09f5b158a7a8cdad920bddc29b81c18a551f5");
t_sha1(a65, 64, "0098ba824b5c16427bd7a1122a5a442a25ec644d");
t_sha1(a65, 65, "11655326c708d70319be2610e8a57d9a5b959d3b");
/* RFC 4231 */
{
uint8_t k1[20];
memset(k1, 0x0b, 20);
t_hmac(k1, 20, "Hi There", 8,
"b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7");
}
t_hmac((const uint8_t *)"Jefe", 4, "what do ya want for nothing?", 28,
"5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843");
{
uint8_t k3[20], m3[50];
memset(k3, 0xaa, 20);
memset(m3, 0xdd, 50);
t_hmac(k3, 20, (const char *)m3, 50,
"773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe");
}
{
uint8_t k4[25], m4[50];
for (int i = 0; i < 25; i++) k4[i] = (uint8_t)(i + 1);
memset(m4, 0xcd, 50);
t_hmac(k4, 25, (const char *)m4, 50,
"82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b");
}
/* long-key path (key > 64 bytes is hashed first): RFC 4231 case 6 */
{
uint8_t k6[131];
memset(k6, 0xaa, 131);
t_hmac(k6, 131, "Test Using Larger Than Block-Size Key - Hash Key First",
54,
"60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54");
}
/* RFC 8439 §2.5.2 — Poly1305 */
{
uint8_t pk[32];
for (int i = 0; i < 32; i++) pk[i] = 0;
static const uint8_t pkv[32] = {
0x85, 0xd6, 0xbe, 0x78, 0x57, 0x55, 0x6d, 0x33, 0x7f, 0x44, 0x52,
0xfe, 0x42, 0xd5, 0x06, 0xa8, 0x01, 0x03, 0x80, 0x8a, 0xfb, 0x0d,
0xb2, 0xfd, 0x4a, 0xbf, 0xf6, 0xaf, 0x41, 0x49, 0xf5, 0x1b };
memcpy(pk, pkv, 32);
t_poly1305(pk, "Cryptographic Forum Research Group", 34,
"a8061dc1305136c6c22b8baf0c0127a9");
}
/* RFC 8439 §2.8.2 — ChaCha20-Poly1305 AEAD: seal matches the vector,
* open round-trips, and a tampered tag is rejected. */
{
uint8_t key[32], nonce[12], aad[12];
for (int i = 0; i < 32; i++) key[i] = (uint8_t)(0x80 + i);
static const uint8_t nv[12] = { 0x07, 0x00, 0x00, 0x00, 0x40, 0x41,
0x42, 0x43, 0x44, 0x45, 0x46, 0x47 };
static const uint8_t av[12] = { 0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1,
0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7 };
memcpy(nonce, nv, 12);
memcpy(aad, av, 12);
const char *pt =
"Ladies and Gentlemen of the class of '99: If I could offer you "
"only one tip for the future, sunscreen would be it.";
size_t ptlen = strlen(pt);
uint8_t out[114 + 16];
int rc = wo_chacha20poly1305_seal(key, nonce, aad, 12,
(const uint8_t *)pt, ptlen, out);
T_CHECK(rc == 0);
char got[(114 + 16) * 2 + 1];
hex(out, ptlen + 16, got);
T_CHECK(strcmp(got,
"d31a8d34648e60db7b86afbc53ef7ec2a4aded51296e08fea9e2b5a736ee62d6"
"3dbea45e8ca9671282fafb69da92728b1a71de0a9e060b2905d6a5b67ecd3b36"
"92ddbd7f2d778b8c9803aee328091b58fab324e4fad675945585808b4831d7bc"
"3ff4def08e4b7a9de576d26586cec64b61161ae10b594f09e26a7e902ecbd060"
"0691") == 0);
uint8_t back[114];
rc = wo_chacha20poly1305_open(key, nonce, aad, 12, out, ptlen,
out + ptlen, back);
T_CHECK(rc == 0);
T_CHECK(memcmp(back, pt, ptlen) == 0);
/* flip one tag bit — must be rejected (rc == 1), not decrypted */
uint8_t tampered[16];
memcpy(tampered, out + ptlen, 16);
tampered[0] ^= 0x01;
rc = wo_chacha20poly1305_open(key, nonce, aad, 12, out, ptlen,
tampered, back);
T_CHECK(rc == 1);
}
/* AES-GCM (rv2 8 phase B) — NIST SP 800-38D test vectors, when hardware
* AES is present (the bitsliced software fallback is phase C). */
if (wo_aes_gcm_available()) {
/* AES-128 GCM test case 4 */
t_aesgcm("feffe9928665731c6d6a8f9467308308",
"cafebabefacedbaddecaf888",
"feedfacedeadbeeffeedfacedeadbeefabaddad2",
"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721"
"c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39",
"42831ec2217774244b7221b784d0d49ce3aa212f2c02a4e035c17e2329aca12e2"
"1d514b25466931c7d8f6a5aac84aa051ba30b396a0aac973d58e091"
"5bc94fbc3221a5db94fae95ae7121a47");
/* AES-256 GCM test case 16 */
t_aesgcm("feffe9928665731c6d6a8f9467308308"
"feffe9928665731c6d6a8f9467308308",
"cafebabefacedbaddecaf888",
"feedfacedeadbeeffeedfacedeadbeefabaddad2",
"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721"
"c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39",
"522dc1f099567d07f47f37a32a84427d643a8cdcbfe5c0c97598a2bd2555d1aa8"
"cb08e48590dbb3da7b08b1056828838c5f61e6393ba7a0abcc9f662"
"76fc6ece0f4e1768cddf8853bb2d551b");
}
/* rv2 8 phase C — the portable constant-time software path, forced on
* (works regardless of hardware), against the same NIST vectors. */
wo_aes_force_software = 1;
t_aesgcm("feffe9928665731c6d6a8f9467308308",
"cafebabefacedbaddecaf888",
"feedfacedeadbeeffeedfacedeadbeefabaddad2",
"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721"
"c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39",
"42831ec2217774244b7221b784d0d49ce3aa212f2c02a4e035c17e2329aca12e2"
"1d514b25466931c7d8f6a5aac84aa051ba30b396a0aac973d58e091"
"5bc94fbc3221a5db94fae95ae7121a47");
t_aesgcm("feffe9928665731c6d6a8f9467308308"
"feffe9928665731c6d6a8f9467308308",
"cafebabefacedbaddecaf888",
"feedfacedeadbeeffeedfacedeadbeefabaddad2",
"d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721"
"c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39",
"522dc1f099567d07f47f37a32a84427d643a8cdcbfe5c0c97598a2bd2555d1aa8"
"cb08e48590dbb3da7b08b1056828838c5f61e6393ba7a0abcc9f662"
"76fc6ece0f4e1768cddf8853bb2d551b");
wo_aes_force_software = 0;
/* HKDF-SHA256 (rv2 9 phase B): RFC 5869 Test Case 1 (Extract + Expand). */
{
uint8_t ikm[22], salt[13], info[10], prk[32], okm[42];
char got[85];
memset(ikm, 0x0b, 22);
for (int i = 0; i < 13; i++) salt[i] = (uint8_t)i;
for (int i = 0; i < 10; i++) info[i] = (uint8_t)(0xf0 + i);
wo_hkdf_sha256_extract(salt, 13, ikm, 22, prk);
hex(prk, 32, got);
T_CHECK(strcmp(got,
"077709362c2e32df0ddc3f0dc47bba6390b6c73bb50f9c3122ec844ad7c2b3e5") == 0);
T_CHECK(wo_hkdf_sha256_expand(prk, info, 10, okm, 42) == 0);
hex(okm, 42, got);
T_CHECK(strcmp(got,
"3cb25f25faacd57a90434f64d0362f2a2d2d0a90cf1a5a4c5db02d56ecc4c5bf"
"34007208d5b887185865") == 0);
}
/* HKDF-Expand-Label (RFC 8446 §7.1), reference values from a known-good
* HKDF-Expand over the tls13 label struct. secret = 0x00..0x1f. */
{
uint8_t secret[32], out[32], h[32];
char got[65];
for (int i = 0; i < 32; i++) secret[i] = (uint8_t)i;
T_CHECK(wo_hkdf_sha256_expand_label(secret, "key", 3, NULL, 0, out, 16) == 0);
hex(out, 16, got);
T_CHECK(strcmp(got, "9c9783cf77ea32d44f369da41f19f3cc") == 0);
T_CHECK(wo_hkdf_sha256_expand_label(secret, "iv", 2, NULL, 0, out, 12) == 0);
hex(out, 12, got);
T_CHECK(strcmp(got, "2f41c846a431a163814bcd71") == 0);
/* with a context = SHA-256("") (a Derive-Secret shape) */
wo_sha256((const uint8_t *)"", 0, h);
T_CHECK(wo_hkdf_sha256_expand_label(secret, "derived", 7, h, 32, out, 32) == 0);
hex(out, 32, got);
T_CHECK(strcmp(got,
"a5b1caa258481fdf573ac069f281e534e4a2379ec9e457e0c8494c227efb40e6") == 0);
}
/* X25519 (rv2 9 phase C) — RFC 7748 §5.2 direct vectors */
t_x25519("a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
"e6db6867583030db3594c1a424b15f7c726624ec26b3353b10a903a6d0ab1c4c",
"c3da55379de9c6908e94ea4df28d084f32eccf03491c71f754b4075577a28552");
t_x25519("4b66e9d4d1b4673c5ad22691957d6af5c11b6421e0ea01d42ca4169e7918ba0d",
"e5210f12786811d3f4b7959d0538ae2c31dbe7106fc03c3efc4cd549c715a493",
"95cbde9476e8907d7aade45cb4b873f88b595a68799fa152e6f8f7647aac7957");
/* RFC 7748 §5.2 iterated test: k=u=9, iterate; check after 1 and 1000. */
{
uint8_t k[32] = { 9 }, u[32] = { 9 }, r[32];
char got[65];
for (int it = 1; it <= 1000; it++) {
wo_x25519(r, k, u);
memcpy(u, k, 32);
memcpy(k, r, 32);
if (it == 1) {
hex(k, 32, got);
T_CHECK(strcmp(got,
"422c8e7a6227d7bca1350b3e2bb7279f7897b87bb6854b783c60e80311ae3079") == 0);
}
}
hex(k, 32, got);
T_CHECK(strcmp(got,
"684cf59ba83309552800ef566f2f4d3c1c3887c49360e3875f2eb94d99532c51") == 0);
}
/* RSA-2048 signature verification (rv2 9 phase D) — vectors from
* python cryptography (PKCS#1 v1.5 and PSS over SHA-256). */
{
static const char *N = "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";
static const char *E = "010001";
static const char *H = "1e1f1eb2f15f5ba5f16363e4c45d0e58ee171e7050bb088dd5125d1f536afe25";
static const char *S1 = "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";
static const char *SP = "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";
uint8_t n[256], e[8], h[32], s[256];
size_t nl = unhex(N, n), el = unhex(E, e);
unhex(H, h);
size_t sl = unhex(S1, s);
T_CHECK(wo_rsa_pkcs1_sha256_verify(n, nl, e, el, s, sl, h) == 1);
s[10] ^= 0x01; /* tamper */
T_CHECK(wo_rsa_pkcs1_sha256_verify(n, nl, e, el, s, sl, h) == 0);
sl = unhex(SP, s);
T_CHECK(wo_rsa_pss_sha256_verify(n, nl, e, el, s, sl, h, 32) == 1);
s[10] ^= 0x01;
T_CHECK(wo_rsa_pss_sha256_verify(n, nl, e, el, s, sl, h, 32) == 0);
unhex(H, h); h[0] ^= 0x01; sl = unhex(S1, s); /* wrong hash rejected */
T_CHECK(wo_rsa_pkcs1_sha256_verify(n, nl, e, el, s, sl, h) == 0);
}
/* ECDSA-P256 verification (rv2 9 phase D2) — python-generated vector. */
{
uint8_t qx[32], qy[32], r[32], s[32], h[32];
unhex("09815e7837d59e0cc38a82ceedde16e4af9bc59077f1d893574a480eb3a14922", qx);
unhex("34cdb6955cd312ee026f5578fed8a72a5e67dafba685a8397a7701ce62835495", qy);
unhex("4de58433951aca644eb8ebbd90362906e5af5c0ac54d7969191c93870f89a862", h);
unhex("06082fac083c1b99f9e201cdba621ba21dbb151416ad5d7d6420e06a50af1d39", r);
unhex("97ead970b0b46cf2f2873e8730c8bc3dad6b31d96d0fe057f35ca73400c0d43b", s);
T_CHECK(wo_ecdsa_p256_sha256_verify(qx, qy, r, s, h) == 1);
h[0] ^= 0x01; /* wrong hash */
T_CHECK(wo_ecdsa_p256_sha256_verify(qx, qy, r, s, h) == 0);
h[0] ^= 0x01; r[0] ^= 0x01; /* tampered r */
T_CHECK(wo_ecdsa_p256_sha256_verify(qx, qy, r, s, h) == 0);
}
/* X.509 chain verification (rv2 9 phase E) — real python-generated chains.
* RSA CA signs RSA leaf (SHA256withRSA); EC P-256 CA signs EC leaf
* (ecdsa-with-SHA256). Verifies leaf-against-CA, CA self-signature, SPKI
* extraction, and rejects a tampered leaf. */
{
/* RSA chain: leaf verifies against its CA, CA self-signs. */
T_CHECK(wo_x509_verify_one(kat_rsa_leaf, sizeof kat_rsa_leaf,
kat_rsa_ca, sizeof kat_rsa_ca) == 1);
T_CHECK(wo_x509_verify_one(kat_rsa_ca, sizeof kat_rsa_ca,
kat_rsa_ca, sizeof kat_rsa_ca) == 1);
/* wrong issuer (EC CA cannot have signed the RSA leaf) rejected */
T_CHECK(wo_x509_verify_one(kat_rsa_leaf, sizeof kat_rsa_leaf,
kat_ec_ca, sizeof kat_ec_ca) == 0);
/* EC chain: ECDSA signature path. */
T_CHECK(wo_x509_verify_one(kat_ec_leaf, sizeof kat_ec_leaf,
kat_ec_ca, sizeof kat_ec_ca) == 1);
T_CHECK(wo_x509_verify_one(kat_ec_ca, sizeof kat_ec_ca,
kat_ec_ca, sizeof kat_ec_ca) == 1);
/* SPKI extraction: RSA leaf yields an RSA key (alg 1), EC leaf an EC
* P-256 key (alg 2) with a 32-byte affine x. */
{
int ka; const uint8_t *n, *e, *x, *y; size_t nl, el;
T_CHECK(wo_x509_parse_spki(kat_rsa_leaf, sizeof kat_rsa_leaf, &ka,
&n, &nl, &e, &el, &x, &y) == 0);
T_CHECK(ka == 1 && nl >= 256 && el >= 1);
T_CHECK(wo_x509_parse_spki(kat_ec_leaf, sizeof kat_ec_leaf, &ka,
&n, &nl, &e, &el, &x, &y) == 0);
T_CHECK(ka == 2 && x != NULL && y != NULL);
}
/* Tampered leaf: flip a byte in the middle of the DER, expect reject.
* (Copy first — the KAT arrays are const.) */
{
static uint8_t bad[sizeof kat_rsa_leaf];
memcpy(bad, kat_rsa_leaf, sizeof bad);
bad[sizeof bad / 2] ^= 0x01;
T_CHECK(wo_x509_verify_one(bad, sizeof bad,
kat_rsa_ca, sizeof kat_rsa_ca) == 0);
}
/* Truncated DER never over-reads, always rejects. */
T_CHECK(wo_x509_verify_one(kat_rsa_leaf, 10,
kat_rsa_ca, sizeof kat_rsa_ca) == 0);
/* Validity window (certs are valid 2020-01-01 .. 2030-01-01). */
T_CHECK(wo_x509_check_validity(kat_rsa_leaf, sizeof kat_rsa_leaf,
"20250101000000") == 1);
T_CHECK(wo_x509_check_validity(kat_rsa_leaf, sizeof kat_rsa_leaf,
"20190101000000") == 0); /* before */
T_CHECK(wo_x509_check_validity(kat_rsa_leaf, sizeof kat_rsa_leaf,
"20310101000000") == 0); /* after */
T_CHECK(wo_x509_check_validity(kat_ec_leaf, sizeof kat_ec_leaf,
"20250101000000") == 1);
}
return t_report("test_crypto");
}
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