Release of v0.8.0

version 0.8.0

• NOTE: Downgrade to previous versions is not possible. See below.
• Update to TPM 2 code release 159
  • X509 support is enabled
    • SM2 signing of ceritificates is NOT supported
  • Authenticated timers are disabled
• Due to fixes in the TPM 2 prime number generation code in rev155 it is not
  possible to downgrade from libtpms version 0.8.0 to some previous version.
  The seeds are now associated with an age so that older seeds use the old
  TPM 2 prime number generation code while newer seed use the newer code.
• Update to TPM 2 code relase 162
  • ECC encryption / decryption is disabled
• Fix support for elliptic curve due to missing unmarshalling code
• Runtime filter supported elliptic curves supported by OpenSSL
• Fix output buffer parameter and size for RSA decryption that could cause
  stack corruption under certain circumstances
• Set the RSA PSS salt length to the digest length rather than max. possible
• Fixes to symmetric decryption related to input size check,
  defer padding to the user [EVP_CIPHER_CTX_set_padding(ctx, 0)] and
  to always use a temporary malloc'ed buffer for decryption
• Fixed the set of PCRs belonging to the TCB group. This affects the
  pcrUpdateCounter in TPM2_Pcrread() responses, thus needs latest swtpm
  for test cases to succeed there.