[thirdparty/openssl.git] / CHANGES


 OpenSSL CHANGES
 _______________

 Changes between 0.9.7e and 0.9.8  [xx XXX xxxx]

  *) 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
81a6c781	1
f1c236f8	2	OpenSSL CHANGES
651d0aff RE	3	_______________
651d0aff RE	4
d5f686d8	5	Changes between 0.9.7e and 0.9.8 [xx XXX xxxx]
4d94ae00	6
c9a112f5	7	*) Change ./Configure so that certain algorithms can be disabled by default.
ecc5ef87 BM	8	The new counterpiece to "no-xxx" is "enable-xxx".
	9
	10	The patented RC5 and MDC2 algorithms will now be disabled unless
	11	"enable-rc5" and "enable-mdc2", respectively, are specified.
	12
	13	(IDEA remains enabled despite being patented. This is because IDEA
	14	is frequently required for interoperability, and there is no license
	15	fee for non-commercial use. As before, "no-idea" can be used to
	16	avoid this algorithm.)
	17
c9a112f5 BM	18	[Bodo Moeller]
c9a112f5 BM	19
6951c23a RL	20	*) Add processing of proxy certificates (see RFC 3820). This work was
	21	sponsored by KTH (The Royal Institute of Technology in Stockholm) and
	22	EGEE (Enabling Grids for E-science in Europe).
	23	[Richard Levitte]
	24
ea681ba8 AP	25	*) RC4 performance overhaul on modern architectures/implementations, such
	26	as Intel P4, IA-64 and AMD64.
	27	[Andy Polyakov]
	28
401ee37a DSH	29	*) New utility extract-section.pl. This can be used specify an alternative
	30	section number in a pod file instead of having to treat each file as
	31	a separate case in Makefile. This can be done by adding two lines to the
	32	pod file:
	33
	34	=for comment openssl_section:XXX
	35
	36	The blank line is mandatory.
	37
	38	[Steve Henson]
	39
826a42a0 DSH	40	*) New arguments -certform, -keyform and -pass for s_client and s_server
	41	to allow alternative format key and certificate files and passphrase
	42	sources.
	43	[Steve Henson]
	44
5d7c222d DSH	45	*) New structure X509_VERIFY_PARAM which combines current verify parameters,
	46	update associated structures and add various utility functions.
	47
	48	Add new policy related verify parameters, include policy checking in
	49	standard verify code. Enhance 'smime' application with extra parameters
	50	to support policy checking and print out.
	51	[Steve Henson]
	52
30fe028f GT	53	*) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
	54	Nehemiah processors. These extensions support AES encryption in hardware
	55	as well as RNG (though RNG support is currently disabled).
	56	[Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
	57
df11e1e9 GT	58	*) Deprecate BN_[get\|set]_params() functions (they were ignored internally).
	59	[Geoff Thorpe]
	60
ad500340 AP	61	*) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
	62	[Andy Polyakov and a number of other people]
	63
e14f4aab AP	64	*) Improved PowerPC platform support. Most notably BIGNUM assembler
	65	implementation contributed by IBM.
	66	[Suresh Chari, Peter Waltenberg, Andy Polyakov]
	67
bcfea9fb GT	68	*) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
	69	exponent rather than 'unsigned long'. There is a corresponding change to
	70	the new 'rsa_keygen' element of the RSA_METHOD structure.
	71	[Jelte Jansen, Geoff Thorpe]
	72
d5f686d8 BM	73	*) Functionality for creating the initial serial number file is now
	74	moved from CA.pl to the 'ca' utility with a new option -create_serial.
	75
	76	(Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
	77	number file to 1, which is bound to cause problems. To avoid
	78	the problems while respecting compatibility between different 0.9.7
	79	patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
	80	CA.pl for serial number initialization. With the new release 0.9.8,
	81	we can fix the problem directly in the 'ca' utility.)
64674bcc DSH	82	[Steve Henson]
64674bcc DSH	83
3a87a9b9 GT	84	*) Reduced header interdepencies by declaring more opaque objects in
	85	ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
	86	give fewer recursive includes, which could break lazy source code - so
	87	this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
	88	developers should define this symbol when building and using openssl to
	89	ensure they track the recommended behaviour, interfaces, [etc], but
	90	backwards-compatible behaviour prevails when this isn't defined.
	91	[Geoff Thorpe]
	92
bf5773fa DSH	93	*) New function X509_POLICY_NODE_print() which prints out policy nodes.
	94	[Steve Henson]
	95
216659eb DSH	96	*) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
	97	This will generate a random key of the appropriate length based on the
	98	cipher context. The EVP_CIPHER can provide its own random key generation
	99	routine to support keys of a specific form. This is used in the des and
	100	3des routines to generate a key of the correct parity. Update S/MIME
	101	code to use new functions and hence generate correct parity DES keys.
	102	Add EVP_CHECK_DES_KEY #define to return an error if the key is not
	103	valid (weak or incorrect parity).
	104	[Steve Henson]
	105
e1a27eb3 DSH	106	*) Add a local set of CRLs that can be used by X509_verify_cert() as well
	107	as looking them up. This is useful when the verified structure may contain
	108	CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
	109	present unless the new PKCS7_NO_CRL flag is asserted.
	110	[Steve Henson]
	111
6446e0c3 DSH	112	*) Extend ASN1 oid configuration module. It now additionally accepts the
	113	syntax:
	114
	115	shortName = some long name, 1.2.3.4
	116	[Steve Henson]
	117
5c98b2ca GT	118	*) Reimplemented the BN_CTX implementation. There is now no more static
	119	limitation on the number of variables it can handle nor the depth of the
	120	"stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
	121	information can now expand as required, and rather than having a single
	122	static array of bignums, BN_CTX now uses a linked-list of such arrays
	123	allowing it to expand on demand whilst maintaining the usefulness of
	124	BN_CTX's "bundling".
	125	[Geoff Thorpe]
	126
46ef873f GT	127	*) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
	128	to allow all RSA operations to function using a single BN_CTX.
	129	[Geoff Thorpe]
	130
4acc3e90 DSH	131	*) Preliminary support for certificate policy evaluation and checking. This
	132	is initially intended to pass the tests outlined in "Conformance Testing
	133	of Relying Party Client Certificate Path Processing Logic" v1.07.
	134	[Steve Henson]
	135
7f663ce4 GT	136	*) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
	137	remained unused and not that useful. A variety of other little bignum
	138	tweaks and fixes have also been made continuing on from the audit (see
	139	below).
	140	[Geoff Thorpe]
	141
875a644a RL	142	*) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
875a644a RL	143	associated ASN1, EVP and SSL functions and old ASN1 macros.
7f663ce4	144	[Richard Levitte]
875a644a	145
b6358c89 GT	146	*) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
	147	and this should never fail. So the return value from the use of
	148	BN_set_word() (which can fail due to needless expansion) is now deprecated;
	149	if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
	150	[Geoff Thorpe]
	151
9e051bac GT	152	*) BN_CTX_get() should return zero-valued bignums, providing the same
	153	initialised value as BN_new().
	154