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boringssl/include/openssl
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David Benjamin 0375127606 Promise more accurate bounds than EVP_MD_MAX_SIZE. 
A caller using EVP_Digest* which a priori knows tighter bounds on the
hash function used (perhaps because it is always a particular hash) can
assume the function will not write more bytes than the size of the hash.

The letter of the rules before vaguely[*] allowed for more than
EVP_MD_MAX_SIZE bytes written which made for some unreasonable code in
Chromium. Officially clarify this and add tests which, when paired with
valgrind and ASan prove it.

BUG=59

[*] Not really. I think it already promised the output length will be
both the number of bytes written and the size of the hash and the size
of the hash is given by what the function promises to compute. Meh.

Change-Id: I736d526e81cca30475c90897bca896293ff30278
Reviewed-on: https://boringssl-review.googlesource.com/9066
Reviewed-by: Eric Roman <ericroman@google.com>
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>
2016-08-01 23:24:04 +00:00
..
aead.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
aes.h Fix documentation typo. 2015-07-01 21:33:29 +00:00
arm_arch.h Remove CRYPTO_set_NEON_functional. 2016-02-23 23:19:46 +00:00
asn1_mac.h Ditch remaining filename comments from public headers and ssl/ 2015-10-20 18:40:05 +00:00
asn1.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
asn1t.h Remove ASN.1 print hooks. 2016-06-14 17:38:31 +00:00
base64.h Replace base64 decoding. 2016-05-26 17:59:10 +00:00
base.h Move some typedefs to base.h. 2016-07-22 21:12:18 +00:00
bio.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
blowfish.h
bn.h Add |BN_mod_inverse_blinded| and use it in RSA blinding. 2016-07-29 18:30:34 +00:00
buf.h Add BUF_MEM_reserve. 2016-05-18 19:09:06 +00:00
buffer.h Add buffer.h for compatibility. 2015-05-12 00:09:57 +00:00
bytestring.h CBBs are in an undefined state after an operation failed. 2016-07-19 20:51:51 +00:00
cast.h
chacha.h Require in == out for in-place encryption. 2016-06-09 19:49:03 +00:00
cipher.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
cmac.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
conf.h Fix the shared library build. 2016-03-09 20:13:41 +00:00
cpu.h Make CRYPTO_is_NEON_capable aware of the buggy CPU. 2016-04-28 16:42:21 +00:00
crypto.h Add no-op function ENGINE_register_all_complete. 2016-07-12 17:54:41 +00:00
curve25519.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
des.h Fix shared library build on OS X. 2015-10-26 23:39:47 +00:00
dh.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
digest.h Promise more accurate bounds than EVP_MD_MAX_SIZE. 2016-08-01 23:24:04 +00:00
dsa.h Move some typedefs to base.h. 2016-07-22 21:12:18 +00:00
dtls1.h Opaquify DTLS structs. 2015-05-08 18:02:02 +00:00
ec_key.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
ec.h Move some typedefs to base.h. 2016-07-22 21:12:18 +00:00
ecdh.h Clean up |ECDH_compute_key|. 2015-10-27 17:00:25 +00:00
ecdsa.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
engine.h Unwind DH_METHOD and DSA_METHOD. 2015-11-03 22:54:36 +00:00
err.h Have doc.go parse struct comments. 2016-01-26 23:23:23 +00:00
evp.h Change |EVP_PKEY_up_ref| to return int. 2016-07-12 17:55:41 +00:00
ex_data.h Skip free callbacks on empty CRYPTO_EX_DATAs. 2015-12-15 21:32:14 +00:00
hkdf.h Const-correct HKDF_expand. 2016-07-16 07:55:19 +00:00
hmac.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
lhash_macros.h
lhash.h Style: fix some header guards 2015-10-26 18:47:51 +00:00
md4.h Add one-shot |MD4| function. 2016-03-09 01:13:55 +00:00
md5.h Store the partial block as uint8_t, not uint32_t. 2015-12-16 19:59:29 +00:00
mem.h Revert "Move C++ helpers into |bssl| namespace." 2016-07-12 08:09:33 -07:00
newhope.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
nid.h Elliptic curve + post-quantum key exchange 2016-05-19 22:19:14 +00:00
obj_mac.h Rename obj_mac.h to nid.h and make it a multiply-includable header. 2016-03-31 20:45:35 +00:00
obj.h Make OBJ_NAME_do_all more OpenSSL-compatible. 2016-06-27 21:42:27 +00:00
objects.h
opensslconf.h Rename opensslfeatures.h to opensslconf.h. 2016-02-26 01:32:50 +00:00
opensslv.h Get version-related functions from crypto.h rather than ssl.h. 2015-05-20 22:58:14 +00:00
ossl_typ.h
pem.h Include crypto.h from pem.h. 2016-05-20 15:31:26 +00:00
pkcs7.h
pkcs8.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
pkcs12.h
poly1305.h Revert "Enable upstream's Poly1305 code." 2016-03-29 22:47:11 +00:00
rand.h Add a deterministic PRNG for fuzzing. 2016-03-03 01:36:19 +00:00
rc4.h Add |RC4_options| to decrepit. 2016-03-09 01:14:30 +00:00
ripemd.h Add RIPEMD160 support in decrepit. 2016-03-09 19:37:14 +00:00
rsa.h Revert scoped_types.h change. 2016-07-12 08:05:38 -07:00
safestack.h
sha.h Fix the comments for |SHA[256|384|512]_Transform|. 2016-07-28 21:49:48 +00:00
srtp.h Fold srtp.h into ssl.h. 2015-09-14 23:59:37 +00:00
ssl3.h Factor out the client_cert_cb code. 2016-07-20 09:25:52 +00:00
ssl.h Minor typo fixes. 2016-08-01 19:49:06 +00:00
stack_macros.h Fix stack macro const-ness. 2016-05-13 18:24:57 +00:00
stack.h Revert "Move C++ helpers into |bssl| namespace." 2016-07-12 08:09:33 -07:00
thread.h Add missing 'does nothing' comments for consistency. 2016-06-28 20:40:45 +00:00
time_support.h Include time.h in time_support.h. 2016-03-17 17:27:27 +00:00
tls1.h Add TLS 1.3 1-RTT. 2016-07-18 09:54:46 +00:00
type_check.h Try to fix MSVC and __STDC_VERSION__ again. 2015-05-20 13:42:12 -07:00
x509_vfy.h Move some typedefs to base.h. 2016-07-22 21:12:18 +00:00
x509.h Drop cached certificate signature validity flag 2016-07-21 17:46:15 +00:00
x509v3.h Move some typedefs to base.h. 2016-07-22 21:12:18 +00:00