With PKCS8_encrypt_pbe and PKCS8_decrypt_pbe gone in
3e8b782c0cc0d9621f622cf80ab1a9bcf442fa17, we can restore the old
arrangement where the password encoding was handled in pkcs12_key_gen.
This simplifies the interface for the follow-up crypto/asn1 split.

Note this change is *not* a no-op for PKCS#12 files which use PBES2.
Before, we would perform the PKCS#12 password encoding for all parts of
PKCS#12 processing. The new behavior is we only perform it for the parts
that go through the PKCS#12 KDF. For such a file, it would only be the
MAC.

I believe the specification supports our new behavior. Although RFC 7292
B.1 says something which implies that the transformation is about
converting passwords to byte strings and would thus be universal,
appendix B itself is prefaced with:

   Note that this method for password privacy mode is not recommended
   and is deprecated for new usage.  The procedures and algorithms
   defined in PKCS #5 v2.1 [13] [22] should be used instead.
   Specifically, PBES2 should be used as encryption scheme, with PBKDF2
   as the key derivation function.

"This method" refers to the key derivation and not the password
formatting, but it does give support to the theory that password
formatting is tied to PKCS#12 key derivation.

(Of course, if one believes PKCS#12's assertion that their inane
encoding (NUL-terminated UTF-16!) is because PKCS#5 failed to talk about
passwords as Unicode strings, one would think that PBES2 (also in
PKCS#5) would have the same issue and thus need PKCS#12 to valiantly
save the day with an encoding...)

This matches OpenSSL's behavior and that of recent versions of NSS. See
https://bugzilla.mozilla.org/show_bug.cgi?id=1268141. I was unable to
figure out what variants, if any, macOS accepts.

BUG=54

Change-Id: I9a1bb4d5e168e6e76b82241e4634b1103e620b9b
Reviewed-on: https://boringssl-review.googlesource.com/14213
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

The OPTIONAL prf field is an AlgorithmIdentifier, not an OID.  I messed
this up in the recent rewrite.

Fix the parsing and add a test, produced by commenting out the logic in
OpenSSL to omit the field for hmacWithSHA1. (We don't currently support
any other PBKDF2, or I'd just add a test for that.)

Change-Id: I7d258bb01b93cd203a6fc1b8cccbddfdbc4dbbad
Reviewed-on: https://boringssl-review.googlesource.com/14330
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

We still need to expose a suitable API for Chromium to consume, but the
core implementation itself should now be ready.

The supported cipher list is based on what EVP_get_cipherbynid currently
supports, excluding the entries which don't have OIDs.

BUG=54

Change-Id: I3befca0a34b330ec1f663a029a8fbf049a4406bd
Reviewed-on: https://boringssl-review.googlesource.com/14212
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

To remove the OID table from Chromium, we'll need to decouple a lot of
this code. In preparation for that, detach the easy cases from the OID
table. What remains is PBES, cipher, and digest OIDs which will be doing
in follow-up changes.

BUG=54

Change-Id: Ie205d23d042e21114ca1faf68917fdc870969d09
Reviewed-on: https://boringssl-review.googlesource.com/14209
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

Avoid the X509_ALGOR dependency entirely. The public API is still using
the legacy ASN.1 structures for now, but the conversions are lifted to
the API boundary. Once we resolve that and the OID table dependency,
this module will no longer block unshipping crypto/asn1 and friends from
Chromium.

This changes the calling convention around the two kinds of PBE suites
we support. Each PBE suite provides a free-form encrypt_init function to
setup an EVP_CIPHER_CTX and write the AlgorithmIdentifer to a CBB. It
then provides a common decrypt_init function which sets up an
EVP_CIPHER_CTX given a CBS of the parameter. The common encrypt code
determines how to call which encrypt_init function. The common decrypt
code parses the OID out of the AlgorithmIdentifer and then dispatches to
decrypt_init.

Note this means the encryption codepath no longer involves parsing back
out a AlgorithmIdentifier it just serialized. We don't have a good story
to access an already serialized piece of a CBB in progress (reallocs can
invalidate the pointer in a CBS), so it's easier to cut this step out
entirely.

Also note this renames the "PBES1" schemes from PKCS#5 to PKCS#12. This
makes it easier to get at the PKCS#12 key derivation hooks. Although
PKCS#12 claims these are variants of PKCS#5's PBES1, they're not very
related. PKCS#12 swaps out the key derivation and even defines its own
AlgorithmIdentifier parameter structure (identical to the PKCS#5 PBES1
one). The only thing of PBES1 that survives is the CBC mode padding
scheme, which is deep in EVP_CIPHER for us. (Of course, all this musing
on layering is moot because we don't implement non-PKCS#12 PBES1 schemes
anyway.)

This also moves some of the random API features (default iteration
count, default salt generation) out of the PBE suites and into the
common code.

BUG=54

Change-Id: Ie96924c73a229be2915be98eab680cadd17326db
Reviewed-on: https://boringssl-review.googlesource.com/13069
Reviewed-by: Adam Langley <alangley@gmail.com>

Change-Id: Ic1f58f87c67104c8a51af59086a1bb1e5ccb0e5b
Reviewed-on: https://boringssl-review.googlesource.com/13084
Reviewed-by: Adam Langley <alangley@gmail.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <alangley@gmail.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

This gets us closer to decoupling from crypto/asn1.

BUG=54

Change-Id: I06ec04ed3cb47c2f56a94c6defa97398bfd0e013
Reviewed-on: https://boringssl-review.googlesource.com/13066
Reviewed-by: Adam Langley <alangley@gmail.com>

This is not quite an end state (it still outputs an X509_ALGOR, the way
the generated salt is fed into key derivation is odd, and it uses the
giant OID table), but replaces a large chunk of it.

BUG=54

Change-Id: I0a0cca13e44e6a09dfaf6aed3b357cb077dc46d1
Reviewed-on: https://boringssl-review.googlesource.com/13065
Reviewed-by: Adam Langley <alangley@gmail.com>
Commit-Queue: Adam Langley <alangley@gmail.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

Many of these parameters are constants.

Change-Id: I148dbea0063e478a132253f4e9dc71d5d20320c2
Reviewed-on: https://boringssl-review.googlesource.com/13064
Reviewed-by: Adam Langley <alangley@gmail.com>
Commit-Queue: Adam Langley <alangley@gmail.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

Change-Id: Iad9b0898b3a602fc2e554c4fd59a599c61cd8ef7
Reviewed-on: https://boringssl-review.googlesource.com/13063
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <alangley@gmail.com>

They're not called externally. Unexporting these will make it easier to
rewrite the PKCS{5,8,12} code to use CBS/CBB rather than X509_ALGOR.
Getting rid of those callers in Chromium probably won't happen for a
while since it's in our on-disk formats. (And a unit test for some NSS
client cert glue uses it.)

BUG=54

Change-Id: Id4148a2ad567484782a6e0322b68dde0619159fc
Reviewed-on: https://boringssl-review.googlesource.com/13062
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <alangley@gmail.com>

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>

For consistency and to avoid a pedantic GCC warning (even though it's
mostly old legacy code).

Change-Id: Iea63eb0a82ff52914adc33b83e48450f4f6a49ef
Reviewed-on: https://boringssl-review.googlesource.com/11021
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>

A lot of consumers of obj.h only want the NID values. Others didn't need
it at all. This also removes some OBJ_nid2sn and OBJ_nid2ln calls in EVP
error paths which isn't worth pulling a large table in for.

BUG=chromium:499653

Change-Id: Id6dff578f993012e35b740a13b8e4f9c2edc0744
Reviewed-on: https://boringssl-review.googlesource.com/7563
Reviewed-by: David Benjamin <davidben@google.com>

The previous commit fixed a signed/unsigned warning but, on 32-bit
systems, long is only 32 bits, so the fix was incorrect there.

Change-Id: I6afe340164de0e176c7f710fcdd095b2a4cddee4

Different compilers find different problems.

Change-Id: I732611005ae1cbfcb4bc70c3f98af2c18b0a04da

Change-Id: If2a83698236f7b0dcd46701ccd257a85463d6ce5
Reviewed-on: https://boringssl-review.googlesource.com/4992
Reviewed-by: Adam Langley <agl@google.com>

Previously a value of 0 would be accepted and intepreted as equivalent
to 1. This contradicts RFC 2898 which defines:

     iterationCount INTEGER (1..MAX),

BUG=https://crbug.com/534961

Change-Id: I89623980f99fde3ca3780880d311955d3f6fe0b5
Reviewed-on: https://boringssl-review.googlesource.com/5971
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

This consists mostly of re-adding OpenSSL's implementation of PBKDF2
(very loosely based upon e0d26bb3).  The meat of it, namely
|PKCS5_PBKDF2_HMAC|, was already present, but unused.

In addition, |PKCS8_encrypt| and |PKCS8_decrypt| must be changed to
not perform UCS-2 conversion in the PBES2 case.

Change-Id: Id170ecabc43c79491600051147d1d6d3c7273dbc
Reviewed-on: https://boringssl-review.googlesource.com/5745
Reviewed-by: Adam Langley <agl@google.com>

Much of this was done automatically with
  find . -name '*.c' | xargs sed -E -i '' -e 's/(OPENSSL_PUT_ERROR\([a-zA-Z_0-9]+, )[a-zA-Z_0-9]+, ([a-zA-Z_0-9]+\);)/\1\2/'
  find . -name '*.c' | xargs sed -E -i '' -e 's/(OPENSSL_PUT_ERROR\([a-zA-Z_0-9]+, )[a-zA-Z_0-9]+,  ([a-zA-Z_0-9]+\);)/\1\2/'

BUG=468039

Change-Id: I4c75fd95dff85ab1d4a546b05e6aed1aeeb499d8
Reviewed-on: https://boringssl-review.googlesource.com/5276
Reviewed-by: Adam Langley <agl@google.com>

Including string.h in base.h causes any file that includes a BoringSSL
header to include string.h. Generally this wouldn't be a problem,
although string.h might slow down the compile if it wasn't otherwise
needed. However, it also causes problems for ipsec-tools in Android
because OpenSSL didn't have this behaviour.

This change removes string.h from base.h and, instead, adds it to each
.c file that requires it.

Change-Id: I5968e50b0e230fd3adf9b72dd2836e6f52d6fb37
Reviewed-on: https://boringssl-review.googlesource.com/3200
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

RAND_pseudo_bytes just calls RAND_bytes now and only returns 0 or 1. Switch all
callers within the library call the new one and use the simpler failure check.
This fixes a few error checks that no longer work (< 0) and some missing ones.

Change-Id: Id51c79deec80075949f73fa1fbd7b76aac5570c6
Reviewed-on: https://boringssl-review.googlesource.com/2621
Reviewed-by: Adam Langley <agl@google.com>

PR#3403

(Imported from upstream's e42c208235)

Change-Id: Ibcdd8c95604f661055bfb1e91b15fd3686a04c0d

Initial fork from f2d678e6e8 (1.0.2 beta).

(This change contains substantial changes from the original and
effectively starts a new history.)