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Ralf S. Engelschall
committed
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Changes between 0.9.6 and 0.9.7 [xx XXX 2001]
OpenSSL 0.9.6a/0.9.6b (bugfix releases, 5 Apr 2001 and 9 July 2001)
and OpenSSL 0.9.7 were developped in parallel, based on OpenSSL 0.9.6.
Change log entries are tagged as follows:
-) applies to 0.9.6a/0.9.6b/0.9.6c only
*) applies to 0.9.6a/0.9.6b/0.9.6c and 0.9.7
+) applies to 0.9.7 only
*) Make it possible to unload ranges of ERR strings with a new
"ERR_unload_strings" function.
[Geoff Thorpe]
*) Rabin-Miller test analyses assume uniformly distributed witnesses,
so use BN_pseudo_rand_range() instead of using BN_pseudo_rand()
followed by modular reduction.
[Bodo Moeller; pointed out by Adam Young <AYoung1@NCSUS.JNJ.COM>]
*) Add BN_pseudo_rand_range() with obvious functionality: BN_rand_range()
requivalent based on BN_pseudo_rand() instead of BN_rand().
[Bodo Moeller]
+) Add a copy() function to EVP_MD.
[Ben Laurie]
+) Make EVP_MD routines take a context pointer instead of just the
md_data voud pointer.
[Ben Laurie]
+) Add flags to EVP_MD and EVP_MD_CTX. EVP_MD_FLAG_ONESHOT indicates
that the digest can only process a single chunk of data
(typically because it is provided by a piece of
hardware). EVP_MD_CTX_FLAG_ONESHOT indicates that the application
is only going to provide a single chunk of data, and hence the
framework needn't accumulate the data for oneshot drivers.
[Ben Laurie]
+) As with "ERR", make it possible to replace the underlying "ex_data"
functions. This change also alters the storage and management of global
ex_data state - it's now all inside ex_data.c and all "class" code (eg.
RSA, BIO, SSL_CTX, etc) no longer stores its own STACKS and per-class
index counters. The API functions that use this state have been changed
to take a "class_index" rather than pointers to the class's local STACK
and counter, and there is now an API function to dynamically create new
classes. This centralisation allows us to (a) plug a lot of the
thread-safety problems that existed, and (b) makes it possible to clean
up all allocated state using "CRYPTO_cleanup_all_ex_data()". W.r.t. (b)
such data would previously have always leaked in application code and
workarounds were in place to make the memory debugging turn a blind eye
to it. Application code that doesn't use this new function will still
leak as before, but their memory debugging output will announce it now
rather than letting it slide.
Besides the addition of CRYPTO_cleanup_all_ex_data(), another API change
induced by the "ex_data" overhaul is that X509_STORE_CTX_init() now
has a return value to indicate success or failure.
+) Make it possible to replace the underlying "ERR" functions such that the
global state (2 LHASH tables and 2 locks) is only used by the "default"
implementation. This change also adds two functions to "get" and "set"
the implementation prior to it being automatically set the first time
any other ERR function takes place. Ie. an application can call "get",
pass the return value to a module it has just loaded, and that module
can call its own "set" function using that value. This means the
module's "ERR" operations will use (and modify) the error state in the
application and not in its own statically linked copy of OpenSSL code.
[Geoff Thorpe]
+) Give DH, DSA, and RSA types their own "**_up()" function to increment
reference counts. This performs normal REF_PRINT/REF_CHECK macros on
the operation, and provides a more encapsulated way for external code
(crypto/evp/ and ssl/) to do this. Also changed the evp and ssl code
to use these functions rather than manually incrementing the counts.
[Geoff Thorpe]
Lutz Jänicke
committed
*) s3_srvr.c: allow sending of large client certificate lists (> 16 kB).
This function was broken, as the check for a new client hello message
to handle SGC did not allow these large messages.
(Tracked down by "Douglas E. Engert" <deengert@anl.gov>.)
[Lutz Jaenicke]
*) Add alert descriptions for TLSv1 to SSL_alert_desc_string[_long]().
[Lutz Jaenicke]
+) Add symmetric cipher support to ENGINE. Expect the API to change!
[Ben Laurie]
+) New CRL functions: X509_CRL_set_version(), X509_CRL_set_issuer_name()
X509_CRL_set_lastUpdate(), X509_CRL_set_nextUpdate(), X509_CRL_sort(),
X509_REVOKED_set_serialNumber(), and X509_REVOKED_set_revocationDate().
These allow a CRL to be built without having to access X509_CRL fields
directly. Modify 'ca' application to use new functions.
[Steve Henson]
*) Fix buggy behaviour of BIO_get_num_renegotiates() and BIO_ctrl()
for BIO_C_GET_WRITE_BUF_SIZE ("Stephen Hinton" <shinton@netopia.com>).
[Lutz Jaenicke]
*) Rework the configuration and shared library support for Tru64 Unix.
The configuration part makes use of modern compiler features and
still retains old compiler behavior for those that run older versions
of the OS. The shared library support part includes a variant that
uses the RPATH feature, and is available through the speciel
configuration target "alpha-cc-rpath", which will never be selected
automatically.
[Tim Mooney <mooney@dogbert.cc.ndsu.NoDak.edu> via Richard Levitte]
*) In ssl3_get_key_exchange (ssl/s3_clnt.c), call ssl3_get_message()
with the same message size as in ssl3_get_certificate_request().
Otherwise, if no ServerKeyExchange message occurs, CertificateRequest
messages might inadvertently be reject as too long.
[Petr Lampa <lampa@fee.vutbr.cz>]
+) Move SSL_OP_TLS_ROLLBACK_BUG out of the SSL_OP_ALL list of recommended
bug workarounds. Rollback attack detection is a security feature.
The problem will only arise on OpenSSL servers when TLSv1 is not
available (sslv3_server_method() or SSL_OP_NO_TLSv1).
Software authors not wanting to support TLSv1 will have special reasons
for their choice and can explicitly enable this option.
[Bodo Moeller, Lutz Jaenicke]
+) Rationalise EVP so it can be extended: don't include a union of
cipher/digest structures, add init/cleanup functions. This also reduces
the number of header dependencies.
[Ben Laurie]
+) Make DES key schedule conform to the usual scheme, as well as
correcting its structure. This means that calls to DES functions
now have to pass a pointer to a des_key_schedule instead of a
plain des_key_schedule (which was actually always a pointer
anyway).
+) Enhanced support for IA-64 Unix platforms (well, Linux and HP-UX).
[Andy Polyakov]
*) Modified SSL library such that the verify_callback that has been set
specificly for an SSL object with SSL_set_verify() is actually being
used. Before the change, a verify_callback set with this function was
ignored and the verify_callback() set in the SSL_CTX at the time of
the call was used. New function X509_STORE_CTX_set_verify_cb() introduced
to allow the necessary settings.
[Lutz Jaenicke]
+) Initial reduction of linker bloat: the use of some functions, such as
PEM causes large amounts of unused functions to be linked in due to
poor organisation. For example pem_all.c contains every PEM function
which has a knock on effect of linking in large amounts of (unused)
ASN1 code. Grouping together similar functions and splitting unrelated
functions prevents this.
[Steve Henson]
*) Initialize static variable in crypto/dsa/dsa_lib.c and crypto/dh/dh_lib.c
explicitely to NULL, as at least on Solaris 8 this seems not always to be
done automatically (in contradiction to the requirements of the C
standard). This made problems when used from OpenSSH.
[Lutz Jaenicke]
*) In OpenSSL 0.9.6a and 0.9.6b, crypto/dh/dh_key.c ignored
dh->length and always used
BN_rand_range(priv_key, dh->p).
BN_rand_range() is not necessary for Diffie-Hellman, and this
specific range makes Diffie-Hellman unnecessarily inefficient if
dh->length (recommended exponent length) is much smaller than the
length of dh->p. We could use BN_rand_range() if the order of
the subgroup was stored in the DH structure, but we only have
dh->length.
So switch back to
BN_rand(priv_key, l, ...)
where 'l' is dh->length if this is defined, or BN_num_bits(dh->p)-1
otherwise.
[Bodo Moeller]
*) In
RSA_eay_public_encrypt
RSA_eay_private_decrypt
RSA_eay_private_encrypt (signing)
RSA_eay_public_decrypt (signature verification)
(default implementations for RSA_public_encrypt,
RSA_private_decrypt, RSA_private_encrypt, RSA_public_decrypt),
always reject numbers >= n.
[Bodo Moeller]
*) In crypto/rand/md_rand.c, use a new short-time lock CRYPTO_LOCK_RAND2
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