[thirdparty/openssl.git] / CHANGES


 OpenSSL CHANGES
 _______________

 Changes between 0.9.8 and 0.9.9  [xx XXX xxxx]

  *) 

 Changes between 0.9.7h and 0.9.8  [xx XXX xxxx]

  *) Add attribute functions to EVP_PKEY structure. Modify
     PKCS12_create() to recognize a CSP name attribute and
     use it. Make -CSP option work again in pkcs12 utility.
     [Steve Henson]

  *) Add new functionality to the bn blinding code:
     - automatic re-creation of the BN_BLINDING parameters after
       a fixed number of uses (currently 32)
     - add new function for parameter creation
     - introduce flags to control the update behaviour of the
       BN_BLINDING parameters
     - hide BN_BLINDING structure
     Add a second BN_BLINDING slot to the RSA structure to improve
     performance when a single RSA object is shared among several
     threads.
     [Nils Larsch]

  *) Add support for DTLS.
     [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]

  *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
     to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
     [Walter Goulet]

  *) Remove buggy and incompletet DH cert support from
     ssl/ssl_rsa.c and ssl/s3_both.c
     [Nils Larsch]

  *) Use SHA-1 instead of MD5 as the default digest algorithm for
     the apps/openssl applications.
     [Nils Larsch]

  *) Compile clean with "-Wall -Wmissing-prototypes
     -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
     DEBUG_SAFESTACK must also be set.
     [Ben Laurie]

  *) Change ./Configure so that certain algorithms can be disabled by default.
     The new counterpiece to "no-xxx" is "enable-xxx".

     The patented RC5 and MDC2 algorithms will now be disabled unless
     "enable-rc5" and "enable-mdc2", respectively, are specified.

     (IDEA remains enabled despite being patented.  This is because IDEA
     is frequently required for interoperability, and there is no license
     fee for non-commercial use.  As before, "no-idea" can be used to
     avoid this algorithm.)

     [Bodo Moeller]

  *) Add processing of proxy certificates (see RFC 3820).  This work was
     sponsored by KTH (The Royal Institute of Technology in Stockholm) and
     EGEE (Enabling Grids for E-science in Europe).
     [Richard Levitte]

  *) RC4 performance overhaul on modern architectures/implementations, such
     as Intel P4, IA-64 and AMD64.
     [Andy Polyakov]

  *) New utility extract-section.pl. This can be used specify an alternative
     section number in a pod file instead of having to treat each file as
     a separate case in Makefile. This can be done by adding two lines to the
     pod file:

     =for comment openssl_section:XXX

     The blank line is mandatory.

     [Steve Henson]

  *) New arguments -certform, -keyform and -pass for s_client and s_server
     to allow alternative format key and certificate files and passphrase
     sources.
     [Steve Henson]

  *) New structure X509_VERIFY_PARAM which combines current verify parameters,
     update associated structures and add various utility functions.

     Add new policy related verify parameters, include policy checking in 
     standard verify code. Enhance 'smime' application with extra parameters
     to support policy checking and print out.
     [Steve Henson]

  *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
     Nehemiah processors. These extensions support AES encryption in hardware
     as well as RNG (though RNG support is currently disabled).
     [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]

  *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
     [Geoff Thorpe]

  *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
     [Andy Polyakov and a number of other people]

  *) Improved PowerPC platform support. Most notably BIGNUM assembler
     implementation contributed by IBM.
     [Suresh Chari, Peter Waltenberg, Andy Polyakov]

  *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
     exponent rather than 'unsigned long'. There is a corresponding change to
     the new 'rsa_keygen' element of the RSA_METHOD structure.
     [Jelte Jansen, Geoff Thorpe]

  *) Functionality for creating the initial serial number file is now
     moved from CA.pl to the 'ca' utility with a new option -create_serial.

     (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
     number file to 1, which is bound to cause problems.  To avoid
     the problems while respecting compatibility between different 0.9.7
     patchlevels, 0.9.7e  employed 'openssl x509 -next_serial' in
     CA.pl for serial number initialization.  With the new release 0.9.8,
     we can fix the problem directly in the 'ca' utility.)
     [Steve Henson]

  *) Reduced header interdepencies by declaring more opaque objects in
     ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
     give fewer recursive includes, which could break lazy source code - so
     this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
     developers should define this symbol when building and using openssl to
     ensure they track the recommended behaviour, interfaces, [etc], but
     backwards-compatible behaviour prevails when this isn't defined.
     [Geoff Thorpe]

  *) New function X509_POLICY_NODE_print() which prints out policy nodes.
     [Steve Henson]

  *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
     This will generate a random key of the appropriate length based on the 
     cipher context. The EVP_CIPHER can provide its own random key generation
     routine to support keys of a specific form. This is used in the des and 
     3des routines to generate a key of the correct parity. Update S/MIME
     code to use new functions and hence generate correct parity DES keys.
     Add EVP_CHECK_DES_KEY #define to return an error if the key is not 
     valid (weak or incorrect parity).
     [Steve Henson]

  *) Add a local set of CRLs that can be used by X509_verify_cert() as well
     as looking them up. This is useful when the verified structure may contain
     CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
     present unless the new PKCS7_NO_CRL flag is asserted.
     [Steve Henson]

  *) Extend ASN1 oid configuration module. It now additionally accepts the
     syntax:

     shortName = some long name, 1.2.3.4
     [Steve Henson]

  *) Reimplemented the BN_CTX implementation. There is now no more static
     limitation on the number of variables it can handle nor the depth of the
     "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
     information can now expand as required, and rather than having a single
     static array of bignums, BN_CTX now uses a linked-list of such arrays
     allowing it to expand on demand whilst maintaining the usefulness of
     BN_CTX's "bundling".
     [Geoff Thorpe]

  *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
     to allow all RSA operations to function using a single BN_CTX.
     [Geoff Thorpe]

  *) Preliminary support for certificate policy evaluation and checking. This
     is initially intended to pass the tests outlined in "Conformance Testing
     of Relying Party Client Certificate Path Processing Logic" v1.07.
     [Steve Henson]

  *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
     remained unused and not that useful. A variety of other little bignum
     tweaks and fixes have also been made continuing on from the audit (see
     below).
     [Geoff Thorpe]

  *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
     associated ASN1, EVP and SSL functions and old ASN1 macros.
     [Richard Levitte]

  *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
     and this should never fail. So the return value from the use of
     BN_set_word() (which can fail due to needless expansion) is now deprecated;
     if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
     [Geoff Thorpe]

  *) BN_CTX_get() should return zero-valued bignums, providing the same
     initialised value as BN_new().
Commit	Line	Data
	1
	2	OpenSSL CHANGES
	3	_______________
	4
	5	Changes between 0.9.8 and 0.9.9 [xx XXX xxxx]
	6
	7	*)
	8
	9	Changes between 0.9.7h and 0.9.8 [xx XXX xxxx]
	10
	11	*) Add attribute functions to EVP_PKEY structure. Modify
	12	PKCS12_create() to recognize a CSP name attribute and
	13	use it. Make -CSP option work again in pkcs12 utility.
	14	[Steve Henson]
	15
	16	*) Add new functionality to the bn blinding code:
	17	- automatic re-creation of the BN_BLINDING parameters after
	18	a fixed number of uses (currently 32)
	19	- add new function for parameter creation
	20	- introduce flags to control the update behaviour of the
	21	BN_BLINDING parameters
	22	- hide BN_BLINDING structure
	23	Add a second BN_BLINDING slot to the RSA structure to improve
	24	performance when a single RSA object is shared among several
	25	threads.
	26	[Nils Larsch]
	27
	28	*) Add support for DTLS.
	29	[Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
	30
	31	*) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
	32	to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
	33	[Walter Goulet]
	34
	35	*) Remove buggy and incompletet DH cert support from
	36	ssl/ssl_rsa.c and ssl/s3_both.c
	37	[Nils Larsch]
	38
	39	*) Use SHA-1 instead of MD5 as the default digest algorithm for
	40	the apps/openssl applications.
	41	[Nils Larsch]
	42
	43	*) Compile clean with "-Wall -Wmissing-prototypes
	44	-Wstrict-prototypes -Wmissing-declarations -Werror". Currently
	45	DEBUG_SAFESTACK must also be set.
	46	[Ben Laurie]
	47
	48	*) Change ./Configure so that certain algorithms can be disabled by default.
	49	The new counterpiece to "no-xxx" is "enable-xxx".
	50
	51	The patented RC5 and MDC2 algorithms will now be disabled unless
	52	"enable-rc5" and "enable-mdc2", respectively, are specified.
	53
	54	(IDEA remains enabled despite being patented. This is because IDEA
	55	is frequently required for interoperability, and there is no license
	56	fee for non-commercial use. As before, "no-idea" can be used to
	57	avoid this algorithm.)
	58
	59	[Bodo Moeller]
	60
	61	*) Add processing of proxy certificates (see RFC 3820). This work was
	62	sponsored by KTH (The Royal Institute of Technology in Stockholm) and
	63	EGEE (Enabling Grids for E-science in Europe).
	64	[Richard Levitte]
	65
	66	*) RC4 performance overhaul on modern architectures/implementations, such
	67	as Intel P4, IA-64 and AMD64.
	68	[Andy Polyakov]
	69
	70	*) New utility extract-section.pl. This can be used specify an alternative
	71	section number in a pod file instead of having to treat each file as
	72	a separate case in Makefile. This can be done by adding two lines to the
	73	pod file:
	74
	75	=for comment openssl_section:XXX
	76
	77	The blank line is mandatory.
	78
	79	[Steve Henson]
	80
	81	*) New arguments -certform, -keyform and -pass for s_client and s_server
	82	to allow alternative format key and certificate files and passphrase
	83	sources.
	84	[Steve Henson]
	85
	86	*) New structure X509_VERIFY_PARAM which combines current verify parameters,
	87	update associated structures and add various utility functions.
	88
	89	Add new policy related verify parameters, include policy checking in
	90	standard verify code. Enhance 'smime' application with extra parameters
	91	to support policy checking and print out.
	92	[Steve Henson]
	93
	94	*) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
	95	Nehemiah processors. These extensions support AES encryption in hardware
	96	as well as RNG (though RNG support is currently disabled).
	97	[Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
	98
	99	*) Deprecate BN_[get\|set]_params() functions (they were ignored internally).
	100	[Geoff Thorpe]
	101
	102	*) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
	103	[Andy Polyakov and a number of other people]
	104
	105	*) Improved PowerPC platform support. Most notably BIGNUM assembler
	106	implementation contributed by IBM.
	107	[Suresh Chari, Peter Waltenberg, Andy Polyakov]
	108
	109	*) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
	110	exponent rather than 'unsigned long'. There is a corresponding change to
	111	the new 'rsa_keygen' element of the RSA_METHOD structure.
	112	[Jelte Jansen, Geoff Thorpe]
	113
	114	*) Functionality for creating the initial serial number file is now
	115	moved from CA.pl to the 'ca' utility with a new option -create_serial.
	116
	117	(Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
	118	number file to 1, which is bound to cause problems. To avoid
	119	the problems while respecting compatibility between different 0.9.7
	120	patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
	121	CA.pl for serial number initialization. With the new release 0.9.8,
	122	we can fix the problem directly in the 'ca' utility.)
	123	[Steve Henson]
	124
	125	*) Reduced header interdepencies by declaring more opaque objects in
	126	ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
	127	give fewer recursive includes, which could break lazy source code - so
	128	this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
	129	developers should define this symbol when building and using openssl to
	130	ensure they track the recommended behaviour, interfaces, [etc], but
	131	backwards-compatible behaviour prevails when this isn't defined.
	132	[Geoff Thorpe]
	133
	134	*) New function X509_POLICY_NODE_print() which prints out policy nodes.
	135	[Steve Henson]
	136
	137	*) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
	138	This will generate a random key of the appropriate length based on the
	139	cipher context. The EVP_CIPHER can provide its own random key generation
	140	routine to support keys of a specific form. This is used in the des and
	141	3des routines to generate a key of the correct parity. Update S/MIME
	142	code to use new functions and hence generate correct parity DES keys.
	143	Add EVP_CHECK_DES_KEY #define to return an error if the key is not
	144	valid (weak or incorrect parity).
	145	[Steve Henson]
	146
	147	*) Add a local set of CRLs that can be used by X509_verify_cert() as well
	148	as looking them up. This is useful when the verified structure may contain
	149	CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
	150	present unless the new PKCS7_NO_CRL flag is asserted.
	151	[Steve Henson]
	152
	153	*) Extend ASN1 oid configuration module. It now additionally accepts the
	154	syntax:
	155
	156	shortName = some long name, 1.2.3.4
	157	[Steve Henson]
	158
	159	*) Reimplemented the BN_CTX implementation. There is now no more static
	160	limitation on the number of variables it can handle nor the depth of the
	161	"stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
	162	information can now expand as required, and rather than having a single
	163	static array of bignums, BN_CTX now uses a linked-list of such arrays
	164	allowing it to expand on demand whilst maintaining the usefulness of
	165	BN_CTX's "bundling".
	166	[Geoff Thorpe]
	167
	168	*) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
	169	to allow all RSA operations to function using a single BN_CTX.
	170	[Geoff Thorpe]
	171
	172	*) Preliminary support for certificate policy evaluation and checking. This
	173	is initially intended to pass the tests outlined in "Conformance Testing
	174	of Relying Party Client Certificate Path Processing Logic" v1.07.
	175	[Steve Henson]
	176
	177	*) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
	178	remained unused and not that useful. A variety of other little bignum
	179	tweaks and fixes have also been made continuing on from the audit (see
	180	below).
	181	[Geoff Thorpe]
	182
	183	*) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
	184	associated ASN1, EVP and SSL functions and old ASN1 macros.
	185	[Richard Levitte]
	186
	187	*) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
	188	and this should never fail. So the return value from the use of
	189	BN_set_word() (which can fail due to needless expansion) is now deprecated;
	190	if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
	191	[Geoff Thorpe]
	192
	193	*) BN_CTX_get() should return zero-valued bignums, providing the same
	194	initialised value as BN_new().
	195