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  21. 18 Oct, 2018 3 commits
    • Dr. Matthias St. Pierre's avatar
      md_rand.c: don't stop polling until properly initialized · 896e8c57
      Dr. Matthias St. Pierre authored
      
      
      Previously, the RNG sets `initialized=1` after the first call to
      RAND_poll(), although its criterion for being initialized actually
      is whether condition `entropy >= ENTROPY_NEEDED` is true.
      
      This commit now assigns `initialized=(entropy >= ENTROPY_NEEDED)`,
      which has the effect that on the next call, RAND_poll() will be
      called again, if it previously failed to obtain enough entropy.
      
      Reviewed-by: default avatarPaul Dale <paul.dale@oracle.com>
      (Merged from https://github.com/openssl/openssl/pull/7439)
      896e8c57
    • Viktor Dukhovni's avatar
      Apply self-imposed path length also to root CAs · 35cf781c
      Viktor Dukhovni authored
      
      
      Also, some readers of the code find starting the count at 1 for EE
      cert confusing (since RFC5280 counts only non-self-issued intermediate
      CAs, but we also counted the leaf).  Therefore, never count the EE
      cert, and adjust the path length comparison accordinly.  This may
      be more clear to the reader.
      
      Reviewed-by: default avatarMatt Caswell <matt@openssl.org>
      (cherry picked from commit dc5831da)
      35cf781c
    • Viktor Dukhovni's avatar
      Only CA certificates can be self-issued · c8ce9e50
      Viktor Dukhovni authored
      At the bottom of https://tools.ietf.org/html/rfc5280#page-12 and
      top of https://tools.ietf.org/html/rfc5280#page-13 (last paragraph
      of above https://tools.ietf.org/html/rfc5280#section-3.3), we see:
      
         This specification covers two classes of certificates: CA
         certificates and end entity certificates.  CA certificates may be
         further divided into three classes: cross-certificates, self-issued
         certificates, and self-signed certificates.  Cross-certificates are
         CA certificates in which the issuer and subject are different
         entities.  Cross-certificates describe a trust relationship between
         the two CAs.  Self-issued certificates are CA certificates in which
         the issuer and subject are the same entity.  Self-issued certificates
         are generated to support changes in policy or operations.  Self-
         signed certificates are self-issued certificates where the digital
         signature may be verified by the public key bound into the
         certificate.  Self-signed certificates are used to convey a public
         key for use to begin certification paths.  End entity certificates
         are issued to subjects that are not authorized to issue certificates.
      
      that the term "self-issued" is only applicable to CAs, not end-entity
      certificates.  In https://tools.ietf.org/html/rfc5280#section-4.2.1.9
      
      
      the description of path length constraints says:
      
         The pathLenConstraint field is meaningful only if the cA boolean is
         asserted and the key usage extension, if present, asserts the
         keyCertSign bit (Section 4.2.1.3).  In this case, it gives the
         maximum number of non-self-issued intermediate certificates that may
         follow this certificate in a valid certification path.  (Note: The
         last certificate in the certification path is not an intermediate
         certificate, and is not included in this limit.  Usually, the last
         certificate is an end entity certificate, but it can be a CA
         certificate.)
      
      This makes it clear that exclusion of self-issued certificates from
      the path length count applies only to some *intermediate* CA
      certificates.  A leaf certificate whether it has identical issuer
      and subject or whether it is a CA or not is never part of the
      intermediate certificate count.  The handling of all leaf certificates
      must be the same, in the case of our code to post-increment the
      path count by 1, so that we ultimately reach a non-self-issued
      intermediate it will be the first one (not zeroth) in the chain
      of intermediates.
      
      Reviewed-by: default avatarMatt Caswell <matt@openssl.org>
      (cherry picked from commit ed422a2d)
      c8ce9e50
  22. 12 Oct, 2018 2 commits
  23. 02 Oct, 2018 1 commit
  24. 26 Sep, 2018 1 commit