This code has caused a long history of problems. This change rewrites it
completely with something that is, hopefully, much simplier and robust
and adds more testing.

Change-Id: Ibeef51f9386afd95d5b73316e451eb3a2d7ec4e0
Reviewed-on: https://boringssl-review.googlesource.com/8033
Reviewed-by: Adam Langley <agl@google.com>

These source files previously didn't have the ISC license on them.

Change-Id: Ic0a2047d23b28d9d7f0a85b2fedb67574bdcab25
Reviewed-on: https://boringssl-review.googlesource.com/7735
Reviewed-by: David Benjamin <davidben@google.com>

This is a fairly common operation on an X509.

Change-Id: I1820f20b555f75c98ab7e3283b5530bc1c200e2a
Reviewed-on: https://boringssl-review.googlesource.com/7611
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>

crypto/x509 parses the SPKI on-demand, so we weren't actually exercising the
SPKI code.

Change-Id: I2e16045bd35dbe04d4b8d8b45939c8885e09a550
Reviewed-on: https://boringssl-review.googlesource.com/7161
Reviewed-by: Adam Langley <agl@google.com>

This change adds fuzzing tests for:
  ∙ Certificate parsing
  ∙ Private key parsing
  ∙ ClientHello parsing
  ∙ Server first flow (ServerHello, Certificate, etc) parsing.

Change-Id: I5f53282263eaaff69b1a03c819cca73750433653
Reviewed-on: https://boringssl-review.googlesource.com/6460
Reviewed-by: Adam Langley <agl@google.com>