+
+/* Search a stack of X509 for a match */
+X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
+ ASN1_INTEGER *serial)
+{
+ int i;
+ X509_CINF cinf;
+ X509 x, *x509 = NULL;
+
+ if (!sk)
+ return NULL;
+
+ x.cert_info = &cinf;
+ cinf.serialNumber = serial;
+ cinf.issuer = name;
+
+ for (i = 0; i < sk_X509_num(sk); i++) {
+ x509 = sk_X509_value(sk, i);
+ if (X509_issuer_and_serial_cmp(x509, &x) == 0)
+ return (x509);
+ }
+ return (NULL);
+}
+
+X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
+{
+ X509 *x509;
+ int i;
+
+ for (i = 0; i < sk_X509_num(sk); i++) {
+ x509 = sk_X509_value(sk, i);
+ if (X509_NAME_cmp(X509_get_subject_name(x509), name) == 0)
+ return (x509);
+ }
+ return (NULL);
+}
+
+EVP_PKEY *X509_get_pubkey(X509 *x)
+{
+ if ((x == NULL) || (x->cert_info == NULL))
+ return (NULL);
+ return (X509_PUBKEY_get(x->cert_info->key));
+}
+
+ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
+{
+ if (!x)
+ return NULL;
+ return x->cert_info->key->public_key;
+}
+
+int X509_check_private_key(X509 *x, EVP_PKEY *k)
+{
+ EVP_PKEY *xk;
+ int ret;
+
+ xk = X509_get_pubkey(x);
+
+ if (xk)
+ ret = EVP_PKEY_cmp(xk, k);
+ else
+ ret = -2;
+
+ switch (ret) {
+ case 1:
+ break;
+ case 0:
+ X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_VALUES_MISMATCH);
+ break;
+ case -1:
+ X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH);
+ break;
+ case -2:
+ X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE);
+ }
+ EVP_PKEY_free(xk);
+ if (ret > 0)
+ return 1;
+ return 0;
+}
+
+/*
+ * Check a suite B algorithm is permitted: pass in a public key and the NID
+ * of its signature (or 0 if no signature). The pflags is a pointer to a
+ * flags field which must contain the suite B verification flags.
+ */
+
+#ifndef OPENSSL_NO_EC
+
+static int check_suite_b(EVP_PKEY *pkey, int sign_nid, unsigned long *pflags)
+{
+ const EC_GROUP *grp = NULL;
+ int curve_nid;
+ if (pkey && pkey->type == EVP_PKEY_EC)
+ grp = EC_KEY_get0_group(pkey->pkey.ec);
+ if (!grp)
+ return X509_V_ERR_SUITE_B_INVALID_ALGORITHM;
+ curve_nid = EC_GROUP_get_curve_name(grp);
+ /* Check curve is consistent with LOS */
+ if (curve_nid == NID_secp384r1) { /* P-384 */
+ /*
+ * Check signature algorithm is consistent with curve.
+ */
+ if (sign_nid != -1 && sign_nid != NID_ecdsa_with_SHA384)
+ return X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM;
+ if (!(*pflags & X509_V_FLAG_SUITEB_192_LOS))
+ return X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED;
+ /* If we encounter P-384 we cannot use P-256 later */
+ *pflags &= ~X509_V_FLAG_SUITEB_128_LOS_ONLY;
+ } else if (curve_nid == NID_X9_62_prime256v1) { /* P-256 */
+ if (sign_nid != -1 && sign_nid != NID_ecdsa_with_SHA256)
+ return X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM;
+ if (!(*pflags & X509_V_FLAG_SUITEB_128_LOS_ONLY))
+ return X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED;
+ } else
+ return X509_V_ERR_SUITE_B_INVALID_CURVE;
+
+ return X509_V_OK;
+}
+
+int X509_chain_check_suiteb(int *perror_depth, X509 *x, STACK_OF(X509) *chain,
+ unsigned long flags)
+{
+ int rv, i, sign_nid;
+ EVP_PKEY *pk = NULL;
+ unsigned long tflags;
+ if (!(flags & X509_V_FLAG_SUITEB_128_LOS))
+ return X509_V_OK;
+ tflags = flags;
+ /* If no EE certificate passed in must be first in chain */
+ if (x == NULL) {
+ x = sk_X509_value(chain, 0);
+ i = 1;
+ } else
+ i = 0;
+
+ if (X509_get_version(x) != 2) {
+ rv = X509_V_ERR_SUITE_B_INVALID_VERSION;
+ /* Correct error depth */
+ i = 0;
+ goto end;
+ }
+
+ pk = X509_get_pubkey(x);
+ /* Check EE key only */
+ rv = check_suite_b(pk, -1, &tflags);
+ if (rv != X509_V_OK) {
+ /* Correct error depth */
+ i = 0;
+ goto end;
+ }
+ for (; i < sk_X509_num(chain); i++) {
+ sign_nid = X509_get_signature_nid(x);
+ x = sk_X509_value(chain, i);
+ if (X509_get_version(x) != 2) {
+ rv = X509_V_ERR_SUITE_B_INVALID_VERSION;
+ goto end;
+ }
+ EVP_PKEY_free(pk);
+ pk = X509_get_pubkey(x);
+ rv = check_suite_b(pk, sign_nid, &tflags);
+ if (rv != X509_V_OK)
+ goto end;
+ }
+
+ /* Final check: root CA signature */
+ rv = check_suite_b(pk, X509_get_signature_nid(x), &tflags);
+ end:
+ EVP_PKEY_free(pk);
+ if (rv != X509_V_OK) {
+ /* Invalid signature or LOS errors are for previous cert */
+ if ((rv == X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM
+ || rv == X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED) && i)
+ i--;
+ /*
+ * If we have LOS error and flags changed then we are signing P-384
+ * with P-256. Use more meaninggul error.
+ */
+ if (rv == X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED && flags != tflags)
+ rv = X509_V_ERR_SUITE_B_CANNOT_SIGN_P_384_WITH_P_256;
+ if (perror_depth)
+ *perror_depth = i;
+ }
+ return rv;
+}
+
+int X509_CRL_check_suiteb(X509_CRL *crl, EVP_PKEY *pk, unsigned long flags)
+{
+ int sign_nid;
+ if (!(flags & X509_V_FLAG_SUITEB_128_LOS))
+ return X509_V_OK;
+ sign_nid = OBJ_obj2nid(crl->crl->sig_alg->algorithm);
+ return check_suite_b(pk, sign_nid, &flags);
+}
+
+#else
+int X509_chain_check_suiteb(int *perror_depth, X509 *x, STACK_OF(X509) *chain,
+ unsigned long flags)
+{
+ return 0;
+}
+
+int X509_CRL_check_suiteb(X509_CRL *crl, EVP_PKEY *pk, unsigned long flags)
+{
+ return 0;
+}
+