[thirdparty/openssl.git] / CHANGES


 OpenSSL CHANGES
 _______________

 Changes between 0.9.7f and 0.9.8  [xx XXX xxxx]

  *) 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
81a6c781	1
f1c236f8	2	OpenSSL CHANGES
651d0aff RE	3	_______________
651d0aff RE	4
12bdb643 NL	5	Changes between 0.9.7f and 0.9.8 [xx XXX xxxx]
	6
	7	*) Use SHA-1 instead of MD5 as the default digest algorithm for
	8	the apps/openssl applications.
	9	[Nils Larsch]
4d94ae00	10
41a15c4f BL	11	*) Compile clean with "-Wall -Wmissing-prototypes
	12	-Wstrict-prototypes -Wmissing-declarations -Werror". Currently
	13	DEBUG_SAFESTACK must also be set.
	14	[Ben Laurie]
	15
c9a112f5	16	*) Change ./Configure so that certain algorithms can be disabled by default.
ecc5ef87 BM	17	The new counterpiece to "no-xxx" is "enable-xxx".
	18
	19	The patented RC5 and MDC2 algorithms will now be disabled unless
	20	"enable-rc5" and "enable-mdc2", respectively, are specified.
	21
	22	(IDEA remains enabled despite being patented. This is because IDEA
	23	is frequently required for interoperability, and there is no license
	24	fee for non-commercial use. As before, "no-idea" can be used to
	25	avoid this algorithm.)
	26
c9a112f5 BM	27	[Bodo Moeller]
c9a112f5 BM	28
6951c23a RL	29	*) Add processing of proxy certificates (see RFC 3820). This work was
	30	sponsored by KTH (The Royal Institute of Technology in Stockholm) and
	31	EGEE (Enabling Grids for E-science in Europe).
	32	[Richard Levitte]
	33
ea681ba8 AP	34	*) RC4 performance overhaul on modern architectures/implementations, such
	35	as Intel P4, IA-64 and AMD64.
	36	[Andy Polyakov]
	37
401ee37a DSH	38	*) New utility extract-section.pl. This can be used specify an alternative
	39	section number in a pod file instead of having to treat each file as
	40	a separate case in Makefile. This can be done by adding two lines to the
	41	pod file:
	42
	43	=for comment openssl_section:XXX
	44
	45	The blank line is mandatory.
	46
	47	[Steve Henson]
	48
826a42a0 DSH	49	*) New arguments -certform, -keyform and -pass for s_client and s_server
	50	to allow alternative format key and certificate files and passphrase
	51	sources.
	52	[Steve Henson]
	53
5d7c222d DSH	54	*) New structure X509_VERIFY_PARAM which combines current verify parameters,
	55	update associated structures and add various utility functions.
	56
	57	Add new policy related verify parameters, include policy checking in
	58	standard verify code. Enhance 'smime' application with extra parameters
	59	to support policy checking and print out.
	60	[Steve Henson]
	61
30fe028f GT	62	*) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
	63	Nehemiah processors. These extensions support AES encryption in hardware
	64	as well as RNG (though RNG support is currently disabled).
	65	[Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
	66
df11e1e9 GT	67	*) Deprecate BN_[get\|set]_params() functions (they were ignored internally).
	68	[Geoff Thorpe]
	69
ad500340 AP	70	*) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
	71	[Andy Polyakov and a number of other people]
	72
e14f4aab AP	73	*) Improved PowerPC platform support. Most notably BIGNUM assembler
	74	implementation contributed by IBM.
	75	[Suresh Chari, Peter Waltenberg, Andy Polyakov]
	76
bcfea9fb GT	77	*) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
	78	exponent rather than 'unsigned long'. There is a corresponding change to
	79	the new 'rsa_keygen' element of the RSA_METHOD structure.
	80	[Jelte Jansen, Geoff Thorpe]
	81
d5f686d8 BM	82	*) Functionality for creating the initial serial number file is now
	83	moved from CA.pl to the 'ca' utility with a new option -create_serial.
	84
	85	(Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
	86	number file to 1, which is bound to cause problems. To avoid
	87	the problems while respecting compatibility between different 0.9.7
	88	patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
	89	CA.pl for serial number initialization. With the new release 0.9.8,
	90	we can fix the problem directly in the 'ca' utility.)
64674bcc DSH	91	[Steve Henson]
64674bcc DSH	92
3a87a9b9 GT	93	*) Reduced header interdepencies by declaring more opaque objects in
	94	ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
	95	give fewer recursive includes, which could break lazy source code - so
	96	this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
	97	developers should define this symbol when building and using openssl to
	98	ensure they track the recommended behaviour, interfaces, [etc], but
	99	backwards-compatible behaviour prevails when this isn't defined.
	100	[Geoff Thorpe]
	101
bf5773fa DSH	102	*) New function X509_POLICY_NODE_print() which prints out policy nodes.
	103	[Steve Henson]
	104
216659eb DSH	105	*) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
	106	This will generate a random key of the appropriate length based on the
	107	cipher context. The EVP_CIPHER can provide its own random key generation
	108	routine to support keys of a specific form. This is used in the des and
	109	3des routines to generate a key of the correct parity. Update S/MIME
	110	code to use new functions and hence generate correct parity DES keys.
	111	Add EVP_CHECK_DES_KEY #define to return an error if the key is not
	112	valid (weak or incorrect parity).
	113	[Steve Henson]
	114
e1a27eb3 DSH	115	*) Add a local set of CRLs that can be used by X509_verify_cert() as well
	116	as looking them up. This is useful when the verified structure may contain
	117	CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
	118	present unless the new PKCS7_NO_CRL flag is asserted.
	119	[Steve Henson]
	120
6446e0c3 DSH	121	*) Extend ASN1 oid configuration module. It now additionally accepts the
	122	syntax:
	123
	124	shortName = some long name, 1.2.3.4
	125	[Steve Henson]
	126
5c98b2ca GT	127	*) Reimplemented the BN_CTX implementation. There is now no more static
	128	limitation on the number of variables it can handle nor the depth of the
	129	"stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
	130	information can now expand as required, and rather than having a single
	131	static array of bignums, BN_CTX now uses a linked-list of such arrays
	132	allowing it to expand on demand whilst maintaining the usefulness of
	133	BN_CTX's "bundling".
	134	[Geoff Thorpe]
	135
46ef873f GT	136	*) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
	137	to allow all RSA operations to function using a single BN_CTX.
	138	[Geoff Thorpe]
	139
4acc3e90 DSH	140	*) Preliminary support for certificate policy evaluation and checking. This
	141	is initially intended to pass the tests outlined in "Conformance Testing
	142	of Relying Party Client Certificate Path Processing Logic" v1.07.
	143	[Steve Henson]
	144
7f663ce4 GT	145	*) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
	146	remained unused and not that useful. A variety of other little bignum
	147	tweaks and fixes have also been made continuing on from the audit (see
	148	below).
	149	[Geoff Thorpe]
	150
875a644a RL	151	*) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
875a644a RL	152	associated ASN1, EVP and SSL functions and old ASN1 macros.
7f663ce4	153	[Richard Levitte]
875a644a	154
b6358c89 GT	155	*) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
	156	and this should never fail. So the return value from the use of
	157	BN_set_word() (which can fail due to needless expansion) is now deprecated;
	158	if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
	159	[Geoff Thorpe]
	160
9e051bac GT	161	*) BN_CTX_get() should return zero-valued bignums, providing the same
	162	initialised value as BN_new().
	163