Most C standard library functions are undefined if passed NULL, even
when the corresponding length is zero. This gives them (and, in turn,
all functions which call them) surprising behavior on empty arrays.
Some compilers will miscompile code due to this rule. See also
https://www.imperialviolet.org/2016/06/26/nonnull.html
Add OPENSSL_memcpy, etc., wrappers which avoid this problem.
BUG=23
Change-Id: I95f42b23e92945af0e681264fffaf578e7f8465e
Reviewed-on: https://boringssl-review.googlesource.com/12928
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
A BN_ULONG[P256_LIMBS] can't represent a negative number and
bn_set_words won't produce one. We only need to compare against P.
Change-Id: I7bd1c9e8c162751637459f23f3cfc56884d85864
Reviewed-on: https://boringssl-review.googlesource.com/12304
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
For the most part, this is with random test data which isn't
particularly good. But we'll be able to add more interesting test
vectors as they come up.
Change-Id: I9c50db7ac2c4bf978d4901000ab32e3642aea82b
Reviewed-on: https://boringssl-review.googlesource.com/12222
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
