Changes between 0.9.6 and 0.9.7 [xx XXX 2001]
- Both OpenSSL 0.9.6a (bugfix release, 5 Apr 2001) and OpenSSL 0.9.7
- are based on OpenSSL 0.9.6.
+ 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) only
- *) applies to 0.9.6a (/0.9.6b) and 0.9.7
+ -) 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
+ *) BN_sqr() bug fix.
+ [Ulf Möller, reported by Jim Ellis <jim.ellis@cavium.com>]
+
+ *) 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.
+ [Geoff Thorpe]
+
+ +) 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]
+
+ *) 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 EVP test program.
+ [Ben Laurie]
+
+ +) 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).
+ [Ben Laurie]
+
+ +) 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
+ to synchronize access to 'locking_thread'. This is necessary on
+ systems where access to 'locking_thread' (an 'unsigned long'
+ variable) is not atomic.
+ [Bodo Moeller]
+
+ *) In crypto/rand/md_rand.c, set 'locking_thread' to current thread's ID
+ *before* setting the 'crypto_lock_rand' flag. The previous code had
+ a race condition if 0 is a valid thread ID.
+ [Travis Vitek <vitek@roguewave.com>]
+
+ +) Cleanup of EVP macros.
+ [Ben Laurie]
+
+ +) Change historical references to {NID,SN,LN}_des_ede and ede3 to add the
+ correct _ecb suffix.
+ [Ben Laurie]
+
+ +) Add initial OCSP responder support to ocsp application. The
+ revocation information is handled using the text based index
+ use by the ca application. The responder can either handle
+ requests generated internally, supplied in files (for example
+ via a CGI script) or using an internal minimal server.
+ [Steve Henson]
+
+ +) Add configuration choices to get zlib compression for TLS.
+ [Richard Levitte]
+
+ +) Changes to Kerberos SSL for RFC 2712 compliance:
+ 1. Implemented real KerberosWrapper, instead of just using
+ KRB5 AP_REQ message. [Thanks to Simon Wilkinson <sxw@sxw.org.uk>]
+ 2. Implemented optional authenticator field of KerberosWrapper.
+
+ Added openssl-style ASN.1 macros for Kerberos ticket, ap_req,
+ and authenticator structs; see crypto/krb5/.
+
+ Generalized Kerberos calls to support multiple Kerberos libraries.
+ [Vern Staats <staatsvr@asc.hpc.mil>,
+ Jeffrey Altman <jaltman@columbia.edu>
+ via Richard Levitte]
+
+ +) Cause 'openssl speed' to use fully hard-coded DSA keys as it
+ already does with RSA. testdsa.h now has 'priv_key/pub_key'
+ values for each of the key sizes rather than having just
+ parameters (and 'speed' generating keys each time).
+ [Geoff Thorpe]
+
+ -) OpenSSL 0.9.6b released [9 July 2001]
+
+ *) Change ssleay_rand_bytes (crypto/rand/md_rand.c)
+ to avoid a SSLeay/OpenSSL PRNG weakness pointed out by
+ Markku-Juhani O. Saarinen <markku-juhani.saarinen@nokia.com>:
+ PRNG state recovery was possible based on the output of
+ one PRNG request appropriately sized to gain knowledge on
+ 'md' followed by enough consecutive 1-byte PRNG requests
+ to traverse all of 'state'.
+
+ 1. When updating 'md_local' (the current thread's copy of 'md')
+ during PRNG output generation, hash all of the previous
+ 'md_local' value, not just the half used for PRNG output.
+
+ 2. Make the number of bytes from 'state' included into the hash
+ independent from the number of PRNG bytes requested.
+
+ The first measure alone would be sufficient to avoid
+ Markku-Juhani's attack. (Actually it had never occurred
+ to me that the half of 'md_local' used for chaining was the
+ half from which PRNG output bytes were taken -- I had always
+ assumed that the secret half would be used.) The second
+ measure makes sure that additional data from 'state' is never
+ mixed into 'md_local' in small portions; this heuristically
+ further strengthens the PRNG.
+ [Bodo Moeller]
+
+ +) Speed up EVP routines.
+ Before:
+encrypt
+type 8 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
+des-cbc 4408.85k 5560.51k 5778.46k 5862.20k 5825.16k
+des-cbc 4389.55k 5571.17k 5792.23k 5846.91k 5832.11k
+des-cbc 4394.32k 5575.92k 5807.44k 5848.37k 5841.30k
+decrypt
+des-cbc 3482.66k 5069.49k 5496.39k 5614.16k 5639.28k
+des-cbc 3480.74k 5068.76k 5510.34k 5609.87k 5635.52k
+des-cbc 3483.72k 5067.62k 5504.60k 5708.01k 5724.80k
+ After:
+encrypt
+des-cbc 4660.16k 5650.19k 5807.19k 5827.13k 5783.32k
+decrypt
+des-cbc 3624.96k 5258.21k 5530.91k 5624.30k 5628.26k
+ [Ben Laurie]
+
+ *) Fix crypto/bn/asm/mips3.s.
+ [Andy Polyakov]
+
+ *) When only the key is given to "enc", the IV is undefined. Print out
+ an error message in this case.
+ [Lutz Jaenicke]
+
+ +) Added the OS2-EMX target.
+ ["Brian Havard" <brianh@kheldar.apana.org.au> and Richard Levitte]
+
+ +) Rewrite apps to use NCONF routines instead of the old CONF. New functions
+ to support NCONF routines in extension code. New function CONF_set_nconf()
+ to allow functions which take an NCONF to also handle the old LHASH
+ structure: this means that the old CONF compatible routines can be
+ retained (in particular wrt extensions) without having to duplicate the
+ code. New function X509V3_add_ext_nconf_sk to add extensions to a stack.
+ [Steve Henson]
+
+ *) Handle special case when X509_NAME is empty in X509 printing routines.
+ [Steve Henson]
+
+ *) In dsa_do_verify (crypto/dsa/dsa_ossl.c), verify that r and s are
+ positive and less than q.
+ [Bodo Moeller]
+
+ +) Enhance the general user interface with mechanisms for inner control
+ and with pssibilities to have yes/no kind of prompts.
+ [Richard Levitte]
+
+ +) Change all calls to low level digest routines in the library and
+ applications to use EVP. Add missing calls to HMAC_cleanup() and
+ don't assume HMAC_CTX can be copied using memcpy().
+ [Verdon Walker <VWalker@novell.com>, Steve Henson]
+
+ +) Add the possibility to control engines through control names but with
+ arbitrary arguments instead of just a string.
+ Change the key loaders to take a UI_METHOD instead of a callback
+ function pointer. NOTE: this breaks binary compatibility with earlier
+ versions of OpenSSL [engine].
+ Addapt the nCipher code for these new conditions and add a card insertion
+ callback.
+ [Richard Levitte]
+
+ +) Enhance the general user interface with mechanisms to better support
+ dialog box interfaces, application-defined prompts, the possibility
+ to use defaults (for example default passwords from somewhere else)
+ and interrupts/cancelations.
+ [Richard Levitte]
+
+ *) Don't change *pointer in CRYPTO_add_lock() is add_lock_callback is
+ used: it isn't thread safe and the add_lock_callback should handle
+ that itself.
+ [Paul Rose <Paul.Rose@bridge.com>]
+
+ *) Verify that incoming data obeys the block size in
+ ssl3_enc (ssl/s3_enc.c) and tls1_enc (ssl/t1_enc.c).
+ [Bodo Moeller]
+
+ +) Tidy up PKCS#12 attribute handling. Add support for the CSP name
+ attribute in PKCS#12 files, add new -CSP option to pkcs12 utility.
+ [Steve Henson]
+
+ *) Fix OAEP check.
+ [Ulf Möller, Bodo Möller]
+
+ *) The countermeasure against Bleichbacher's attack on PKCS #1 v1.5
+ RSA encryption was accidentily removed in s3_srvr.c in OpenSSL 0.9.5
+ when fixing the server behaviour for backwards-compatible 'client
+ hello' messages. (Note that the attack is impractical against
+ SSL 3.0 and TLS 1.0 anyway because length and version checking
+ means that the probability of guessing a valid ciphertext is
+ around 2^-40; see section 5 in Bleichenbacher's CRYPTO '98
+ paper.)
+
+ Before 0.9.5, the countermeasure (hide the error by generating a
+ random 'decryption result') did not work properly because
+ ERR_clear_error() was missing, meaning that SSL_get_error() would
+ detect the supposedly ignored error.
+
+ Both problems are now fixed.
+ [Bodo Moeller]
+
+ *) In crypto/bio/bf_buff.c, increase DEFAULT_BUFFER_SIZE to 4096
+ (previously it was 1024).
+ [Bodo Moeller]
+
+ +) Fix a memory leak in 'sk_dup()' in the case reallocation fails. (Also
+ tidy up some unecessarily weird code in 'sk_new()').
+ [Geoff, reported by Diego Tartara <dtartara@novamens.com>]
+
+ +) Change the key loading routines for ENGINEs to use the same kind
+ callback (pem_password_cb) as all other routines that need this
+ kind of callback.
+ [Richard Levitte]
+
+ *) Fix for compatibility mode trust settings: ignore trust settings
+ unless some valid trust or reject settings are present.
+ [Steve Henson]
+
+ *) Fix for blowfish EVP: its a variable length cipher.
+ [Steve Henson]
+
+ +) Increase ENTROPY_NEEDED to 32 bytes, as Rijndael can operate with
+ 256 bit (=32 byte) keys. Of course seeding with more entropy bytes
+ than this minimum value is recommended.
+ [Lutz Jaenicke]
+
+ +) New random seeder for OpenVMS, using the system process statistics
+ that are easily reachable.
+ [Richard Levitte]
+
+ +) Windows apparently can't transparently handle global
+ variables defined in DLLs. Initialisations such as:
+
+ const ASN1_ITEM *it = &ASN1_INTEGER_it;
+
+ wont compile. This is used by the any applications that need to
+ delcare their own ASN1 modules. This was fixed by adding the option
+ EXPORT_VAR_AS_FN to all Win32 platforms, although this isn't strictly
+ needed for static libraries under Win32.
+ [Steve Henson]
+
+ +) New functions X509_PURPOSE_set() and X509_TRUST_set() to handle
+ setting of purpose and trust fields. New X509_STORE trust and
+ purpose functions and tidy up setting in other SSL functions.
+ [Steve Henson]
+
+ +) Add copies of X509_STORE_CTX fields and callbacks to X509_STORE
+ structure. These are inherited by X509_STORE_CTX when it is
+ initialised. This allows various defaults to be set in the
+ X509_STORE structure (such as flags for CRL checking and custom
+ purpose or trust settings) for functions which only use X509_STORE_CTX
+ internally such as S/MIME.
+
+ Modify X509_STORE_CTX_purpose_inherit() so it only sets purposes and
+ trust settings if they are not set in X509_STORE. This allows X509_STORE
+ purposes and trust (in S/MIME for example) to override any set by default.
+
+ Add command line options for CRL checking to smime, s_client and s_server
+ applications.
+ [Steve Henson]
+
+ +) Initial CRL based revocation checking. If the CRL checking flag(s)
+ are set then the CRL is looked up in the X509_STORE structure and
+ its validity and signature checked, then if the certificate is found
+ in the CRL the verify fails with a revoked error.
+
+ Various new CRL related callbacks added to X509_STORE_CTX structure.
+
+ Command line options added to 'verify' application to support this.
+
+ This needs some additional work, such as being able to handle multiple
+ CRLs with different times, extension based lookup (rather than just
+ by subject name) and ultimately more complete V2 CRL extension
+ handling.
+ [Steve Henson]
+
+ +) Add a general user interface API (crypto/ui/). This is designed
+ to replace things like des_read_password and friends (backward
+ compatibility functions using this new API are provided).
+ The purpose is to remove prompting functions from the DES code
+ section as well as provide for prompting through dialog boxes in
+ a window system and the like.
+ [Richard Levitte]
+
+ *) Fix various bugs related to DSA S/MIME verification. Handle missing
+ parameters in DSA public key structures and return an error in the
+ DSA routines if parameters are absent.
+ [Steve Henson]
+
+ *) In versions up to 0.9.6, RAND_file_name() resorted to file ".rnd"
+ in the current directory if neither $RANDFILE nor $HOME was set.
+ RAND_file_name() in 0.9.6a returned NULL in this case. This has
+ caused some confusion to Windows users who haven't defined $HOME.
+ Thus RAND_file_name() is changed again: e_os.h can define a
+ DEFAULT_HOME, which will be used if $HOME is not set.
+ For Windows, we use "C:"; on other platforms, we still require
+ environment variables.
+
+) Add "ex_data" support to ENGINE so implementations can add state at a
per-structure level rather than having to store it globally.
[Geoff]
ENGINE structure.
[Geoff]
- +) Fix various bugs related to DSA S/MIME verification. Handle missing
- parameters in DSA public key structures and return an error in the
- DSA routines if parameters are absent.
- [Steve Henson]
-
+) Fix ASN1 decoder when decoding type ANY and V_ASN1_OTHER: since this
needs to match any other type at all we need to manually clear the
tag cache.
*) Fix X509_NAME bug which produced incorrect encoding if X509_NAME
was empty.
+ [Steve Henson]
[This change does not apply to 0.9.7.]
*) Use the cached encoding of an X509_NAME structure rather than
the clients preferred ciphersuites and rather use its own preferences.
Should help to work around M$ SGC (Server Gated Cryptography) bug in
Internet Explorer by ensuring unchanged hash method during stepup.
+ (Also replaces the broken/deactivated SSL_OP_NON_EXPORT_FIRST option.)
[Lutz Jaenicke]
+) Make mkdef.pl recognise all DECLARE_ASN1 macros, change rijndael
[Geoff Thorpe]
+) Add automatic query of EGD sockets in RAND_poll() for the unix variant.
- If an EGD or PRNGD is running and enough entropy is returned, automatic
- seeding like with /dev/[u]random will be performed.
- Positions tried are: /etc/entropy, /var/run/egd-pool.
+ If /dev/[u]random devices are not available or do not return enough
+ entropy, EGD style sockets (served by EGD or PRNGD) will automatically
+ be queried.
+ The locations /var/run/egd-pool, /dev/egd-pool, /etc/egd-pool, and
+ /etc/entropy will be queried once each in this sequence, quering stops
+ when enough entropy was collected without querying more sockets.
[Lutz Jaenicke]
+) Change the Unix RAND_poll() variant to be able to poll several
default is static libraries only, and the OpenSSL programs
are always statically linked for now, but there are
preparations for dynamic linking in place.
- This has been tested on Linux and True64.
+ This has been tested on Linux and Tru64.
[Richard Levitte]
*) Randomness polling function for Win9x, as described in:
copied!)
[Bodo Moeller]
- *) Bugfix: SSL_set_mode ignored its parameter, only SSL_CTX_set_mode
+ *) Bugfix: SSL_set_options ignored its parameter, only SSL_CTX_set_options
worked.
*) Fix problems with no-hmac etc.
projects / openssl.git / blobdiff