crit-cert.pem:
  Simple self-signed certificate with critical Basic Constraints and Key Usage
  extensions.
dh512.pem, dh512.der:
  512-bit DH parameters. Used for testing the rejection of lower-bit sized DH
  keys.
dh1024.pem, dh1024.der:
  1024-bit DH parameters. Used for testing the rejection of lower-bit sized DH
  keys.
digsigku.pem:
  ECC certificate with a KeyUsage extension without the digitalSignature bit
  set.
cert-ext-joi.pem:
  Simple certificate that includes OIDs for JurisdictionOfIncorporation
cert-ext-oid-collide.der:
  Non-critical extension whose 4-byte OID has the same wc_oid_sum() as
  prime256v1, so it maps to a NID with a longer canonical OID. Tests that
  wolfSSL_X509_set_ext() sizes the ASN1_OBJECT buffer from the certificate's
  OID, not the mapped one. Does not collide under WOLFSSL_OLD_OID_SUM.
  Signature is invalid; only ever parsed, never verified. Regenerate with
  certs/test/gen-oid-collide-cert.sh.
