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6746 - Use deterministic P-256 vector in short-coordinate test

pull/547/head
aidan garske 2026-07-07 13:47:56 -07:00
parent fe88c6aedc
commit a79760c3db
1 changed files with 15 additions and 25 deletions
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40
tests/unit_tests.c
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@ -2703,35 +2703,26 @@ static void test_wolfTPM2_EccKey_TpmToWolf_ShortCoord(void)
#if !defined(WOLFTPM2_NO_WOLFCRYPT) && defined(HAVE_ECC) && \ #if !defined(WOLFTPM2_NO_WOLFCRYPT) && defined(HAVE_ECC) && \
defined(HAVE_ECC_KEY_IMPORT) && defined(HAVE_ECC_KEY_EXPORT) && \ defined(HAVE_ECC_KEY_IMPORT) && defined(HAVE_ECC_KEY_EXPORT) && \
!defined(WOLFTPM2_NO_WRAPPER) && !defined(NO_ECC256) !defined(WOLFTPM2_NO_WRAPPER) && !defined(NO_ECC256)
int rc, i, found = 0; int rc;
WC_RNG rng; ecc_key impKey;
ecc_key genKey, impKey;
WOLFTPM2_DEV dev; WOLFTPM2_DEV dev;
WOLFTPM2_KEY tpmKey; WOLFTPM2_KEY tpmKey;
byte xRaw[32], yRaw[32];
byte xImp[32], yImp[32]; byte xImp[32], yImp[32];
word32 xSz, ySz, xImpSz, yImpSz; word32 xImpSz, yImpSz;
/* Valid P-256 point whose x has a zero MSB, so the spec-valid stripped
* TPM form (size 31) is shorter than the 32-byte field */
const byte xRaw[32] = {
0x00, 0x4d, 0xb3, 0x2d, 0x25, 0x8e, 0x4d, 0xfd,
0x3f, 0x47, 0xdc, 0x30, 0x9f, 0x36, 0x7a, 0x84,
0x17, 0x7d, 0x47, 0x71, 0x47, 0x76, 0x5d, 0x04,
0xd7, 0x11, 0xca, 0x8f, 0xba, 0x92, 0x2f, 0x2c};
const byte yRaw[32] = {
0xb3, 0x3d, 0x81, 0xc0, 0x73, 0x66, 0xfd, 0x51,
0xd5, 0x6f, 0x53, 0xed, 0xac, 0x11, 0x36, 0x40,
0xb0, 0xb5, 0x23, 0xee, 0x7e, 0x32, 0x99, 0x35,
0x5e, 0x0d, 0x99, 0xfa, 0xb3, 0x75, 0xc7, 0x57};
XMEMSET(&dev, 0, sizeof(dev)); XMEMSET(&dev, 0, sizeof(dev));
AssertIntEQ(0, wc_InitRng(&rng));
/* Find a P-256 key whose x has a zero MSB so the stripped TPM form is
* shorter than the field size */
for (i = 0; i < 20000 && !found; i++) {
wc_ecc_init(&genKey);
rc = wc_ecc_make_key_ex(&rng, 32, &genKey, ECC_SECP256R1);
if (rc == 0) {
xSz = sizeof(xRaw);
ySz = sizeof(yRaw);
rc = wc_ecc_export_public_raw(&genKey, xRaw, &xSz, yRaw, &ySz);
}
if (rc == 0 && xSz == 32 && xRaw[0] == 0x00) {
found = 1;
}
wc_ecc_free(&genKey);
}
AssertIntEQ(1, found);
XMEMSET(&tpmKey, 0, sizeof(tpmKey)); XMEMSET(&tpmKey, 0, sizeof(tpmKey));
tpmKey.pub.publicArea.type = TPM_ALG_ECC; tpmKey.pub.publicArea.type = TPM_ALG_ECC;
tpmKey.pub.publicArea.parameters.eccDetail.curveID = TPM_ECC_NIST_P256; tpmKey.pub.publicArea.parameters.eccDetail.curveID = TPM_ECC_NIST_P256;
@ -2753,7 +2744,6 @@ static void test_wolfTPM2_EccKey_TpmToWolf_ShortCoord(void)
AssertIntEQ(0, XMEMCMP(yImp, yRaw, 32)); AssertIntEQ(0, XMEMCMP(yImp, yRaw, 32));
wc_ecc_free(&impKey); wc_ecc_free(&impKey);
wc_FreeRng(&rng);
printf("Test TPM Wrapper: %-40s Passed\n", "EccKey_TpmToWolf short coord:"); printf("Test TPM Wrapper: %-40s Passed\n", "EccKey_TpmToWolf short coord:");
#endif #endif
} }