With PKCS8_encrypt_pbe and PKCS8_decrypt_pbe gone in
3e8b782c0c, 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>
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>
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>
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>
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>
Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta).
(This change contains substantial changes from the original and
effectively starts a new history.)
