// Perform a hash of the provided cert, then search in the RootHashes.inc data
// structure for a matching bin number.
int32_t
RootCABinNumber(const SECItem* cert)
{
Digest digest;
// Compute SHA256 hash of the certificate
nsresult rv = digest.DigestBuf(SEC_OID_SHA256, cert->data, cert->len);
if (NS_WARN_IF(NS_FAILED(rv))) {
return HASH_FAILURE;
}
// Compare against list of stored hashes
size_t idx;
PR_LOG(PublicKeyPinningTelemetryLog(), PR_LOG_DEBUG,
("pkpinTelem: First bytes %02hx %02hx %02hx %02hx\n",
digest.get().data[0], digest.get().data[1], digest.get().data[2], digest.get().data[3]));
if (mozilla::BinarySearchIf(ROOT_TABLE, 0, ArrayLength(ROOT_TABLE),
BinaryHashSearchArrayComparator(
reinterpret_cast<const uint8_t*>(digest.get().data), digest.get().len),
&idx)) {
PR_LOG(PublicKeyPinningTelemetryLog(), PR_LOG_DEBUG,
("pkpinTelem: Telemetry index was %lu, bin is %d\n",
idx, ROOT_TABLE[idx].binNumber));
return (int32_t) ROOT_TABLE[idx].binNumber;
}
// Didn't match.
return UNKNOWN_ROOT;
}
// Perform a hash of the provided cert, then search in the RootHashes.inc data
// structure for a matching bin number.
int32_t
RootCABinNumber(const SECItem* cert)
{
Digest digest;
// Compute SHA256 hash of the certificate
nsresult rv = digest.DigestBuf(SEC_OID_SHA256, cert->data, cert->len);
if (NS_WARN_IF(NS_FAILED(rv))) {
return ROOT_CERTIFICATE_HASH_FAILURE;
}
// Compare against list of stored hashes
size_t idx;
MOZ_LOG(gPublicKeyPinningTelemetryLog, LogLevel::Debug,
("pkpinTelem: First bytes %02x %02x %02x %02x\n",
digest.get().data[0], digest.get().data[1], digest.get().data[2], digest.get().data[3]));
if (mozilla::BinarySearchIf(ROOT_TABLE, 0, ArrayLength(ROOT_TABLE),
BinaryHashSearchArrayComparator(static_cast<uint8_t*>(digest.get().data),
digest.get().len),
&idx)) {
MOZ_LOG(gPublicKeyPinningTelemetryLog, LogLevel::Debug,
("pkpinTelem: Telemetry index was %" PRIuSIZE ", bin is %d\n",
idx, ROOT_TABLE[idx].binNumber));
return (int32_t) ROOT_TABLE[idx].binNumber;
}
// Didn't match.
return ROOT_CERTIFICATE_UNKNOWN;
}
nsresult
nsNSSCertificate::GetCertificateHash(nsAString& aFingerprint, SECOidTag aHashAlg)
{
nsNSSShutDownPreventionLock locker;
if (isAlreadyShutDown()) {
return NS_ERROR_NOT_AVAILABLE;
}
aFingerprint.Truncate();
Digest digest;
nsresult rv = digest.DigestBuf(aHashAlg, mCert->derCert.data,
mCert->derCert.len);
if (NS_FAILED(rv)) {
return rv;
}
// CERT_Hexify's second argument is an int that is interpreted as a boolean
char* fpStr = CERT_Hexify(const_cast<SECItem*>(&digest.get()), 1);
if (!fpStr) {
return NS_ERROR_FAILURE;
}
aFingerprint.AssignASCII(fpStr);
PORT_Free(fpStr);
return NS_OK;
}
NS_IMETHODIMP
nsDataSignatureVerifier::VerifySignature(const char* aRSABuf,
uint32_t aRSABufLen,
const char* aPlaintext,
uint32_t aPlaintextLen,
int32_t* aErrorCode,
nsICertificatePrincipal** aPrincipal)
{
if (!aPlaintext || !aPrincipal || !aErrorCode) {
return NS_ERROR_INVALID_ARG;
}
*aErrorCode = VERIFY_ERROR_OTHER;
*aPrincipal = nullptr;
nsNSSShutDownPreventionLock locker;
Digest digest;
nsresult rv = digest.DigestBuf(SEC_OID_SHA1,
reinterpret_cast<const uint8_t*>(aPlaintext),
aPlaintextLen);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
SECItem buffer = {
siBuffer,
reinterpret_cast<uint8_t*>(const_cast<char*>(aRSABuf)),
aRSABufLen
};
VerifyCertificateContext context;
// XXX: pinArg is missing
rv = VerifyCMSDetachedSignatureIncludingCertificate(buffer, digest.get(),
VerifyCertificate,
&context, nullptr);
if (NS_SUCCEEDED(rv)) {
*aErrorCode = VERIFY_OK;
} else if (NS_ERROR_GET_MODULE(rv) == NS_ERROR_MODULE_SECURITY) {
if (rv == GetXPCOMFromNSSError(SEC_ERROR_UNKNOWN_ISSUER)) {
*aErrorCode = VERIFY_ERROR_UNKNOWN_ISSUER;
} else {
*aErrorCode = VERIFY_ERROR_OTHER;
}
rv = NS_OK;
}
if (rv == NS_OK) {
context.principal.forget(aPrincipal);
}
return rv;
}
/**
Computes in the location specified by base64Out the SHA256 digest
of the DER Encoded subject Public Key Info for the given cert
*/
static nsresult
GetBase64HashSPKI(const CERTCertificate* cert, nsACString& hashSPKIDigest)
{
hashSPKIDigest.Truncate();
Digest digest;
nsresult rv = digest.DigestBuf(SEC_OID_SHA256, cert->derPublicKey.data,
cert->derPublicKey.len);
if (NS_FAILED(rv)) {
return rv;
}
return Base64Encode(nsDependentCSubstring(
reinterpret_cast<const char*>(digest.get().data),
digest.get().len),
hashSPKIDigest);
}
/**
Computes in the location specified by base64Out the SHA256 digest
of the DER Encoded subject Public Key Info for the given cert
*/
static SECStatus
GetBase64SHA256SPKI(const CERTCertificate* cert,
nsACString& aSha256SPKIDigest){
aSha256SPKIDigest.Truncate();
Digest digest;
nsresult rv = digest.DigestBuf(SEC_OID_SHA256, cert->derPublicKey.data,
cert->derPublicKey.len);
if (NS_WARN_IF(NS_FAILED(rv))) {
return SECFailure;
}
rv = Base64Encode(nsDependentCSubstring(
reinterpret_cast<const char*>(digest.get().data),
digest.get().len),
aSha256SPKIDigest);
if (NS_WARN_IF(NS_FAILED(rv))) {
return SECFailure;
}
return SECSuccess;
}
NS_IMETHODIMP
nsNSSCertificate::GetSha256SubjectPublicKeyInfoDigest(nsACString& aSha256SPKIDigest)
{
nsNSSShutDownPreventionLock locker;
if (isAlreadyShutDown()) {
return NS_ERROR_NOT_AVAILABLE;
}
aSha256SPKIDigest.Truncate();
Digest digest;
nsresult rv = digest.DigestBuf(SEC_OID_SHA256, mCert->derPublicKey.data,
mCert->derPublicKey.len);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = Base64Encode(nsDependentCSubstring(
reinterpret_cast<const char*> (digest.get().data),
digest.get().len),
aSha256SPKIDigest);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
