[thirdparty/openssl.git] / CHANGES


 OpenSSL CHANGES
 _______________

 Changes between 0.9.7 and 0.9.8  [xx XXX 2002]

  *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
     As these are not official, they are not included in "ALL";
     the "ECCdraft" ciphersuite group alias can be used to select them.
     [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]

TODO: COMPLEMENTOFALL and COMPLEMENTOFDEFAULT do not handle ECCdraft
cipher suites correctly.

  *) Add ECDH engine support.
     [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]

  *) Add ECDH in new directory crypto/ecdh/.
     [Douglas Stebila (Sun Microsystems Laboratories)]

  *) Let BN_rand_range() abort with an error after 100 iterations
     without success (which indicates a broken PRNG).
     [Bodo Moeller]

  *) Change BN_mod_sqrt() so that it verifies that the input value
     is really the square of the return value.  (Previously,
     BN_mod_sqrt would show GIGO behaviour.)
     [Bodo Moeller]

  *) Add named elliptic curves over binary fields from X9.62, SECG,
     and WAP/WTLS; add OIDs that were still missing.

     [Sheueling Chang Shantz and Douglas Stebila
     (Sun Microsystems Laboratories)]

  *) Extend the EC library for elliptic curves over binary fields
     (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
     New EC_METHOD:

          EC_GF2m_simple_method

     New API functions:

          EC_GROUP_new_curve_GF2m
          EC_GROUP_set_curve_GF2m
          EC_GROUP_get_curve_GF2m
          EC_POINT_set_affine_coordinates_GF2m
          EC_POINT_get_affine_coordinates_GF2m
          EC_POINT_set_compressed_coordinates_GF2m

     Point compression for binary fields is disabled by default for
     patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
     enable it).

     As binary polynomials are represented as BIGNUMs, various members
     of the EC_GROUP and EC_POINT data structures can be shared
     between the implementations for prime fields and binary fields;
     the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
     are essentially identical to their ..._GFp counterparts.
     (For simplicity, the '..._GFp' prefix has been dropped from
     various internal method names.)

     An internal 'field_div' method (similar to 'field_mul' and
     'field_sqr') has been added; this is used only for binary fields.

     [Sheueling Chang Shantz and Douglas Stebila
     (Sun Microsystems Laboratories)]

  *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
     through methods ('mul', 'precompute_mult').

     The generic implementations (now internally called 'ec_wNAF_mul'
     and 'ec_wNAF_precomputed_mult') remain the default if these
     methods are undefined.

     [Sheueling Chang Shantz and Douglas Stebila
     (Sun Microsystems Laboratories)]

  *) New function EC_GROUP_get_degree, which is defined through
     EC_METHOD.  For curves over prime fields, this returns the bit
     length of the modulus.

     [Sheueling Chang Shantz and Douglas Stebila
     (Sun Microsystems Laboratories)]

  *) New functions EC_GROUP_dup, EC_POINT_dup.
     (These simply call ..._new  and ..._copy).

     [Sheueling Chang Shantz and Douglas Stebila
     (Sun Microsystems Laboratories)]

  *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
     Polynomials are represented as BIGNUMs (where the sign bit is not
     used) in the following functions [macros]:  

          BN_GF2m_add
          BN_GF2m_sub             [= BN_GF2m_add]
          BN_GF2m_mod             [wrapper for BN_GF2m_mod_arr]
          BN_GF2m_mod_mul         [wrapper for BN_GF2m_mod_mul_arr]
          BN_GF2m_mod_sqr         [wrapper for BN_GF2m_mod_sqr_arr]
          BN_GF2m_mod_inv
          BN_GF2m_mod_exp         [wrapper for BN_GF2m_mod_exp_arr]
          BN_GF2m_mod_sqrt        [wrapper for BN_GF2m_mod_sqrt_arr]
          BN_GF2m_mod_solve_quad  [wrapper for BN_GF2m_mod_solve_quad_arr]
          BN_GF2m_cmp             [= BN_ucmp]

     (Note that only the 'mod' functions are actually for fields GF(2^m).
     BN_GF2m_add() is misnomer, but this is for the sake of consistency.)

     For some functions, an the irreducible polynomial defining a
     field can be given as an 'unsigned int[]' with strictly
     decreasing elements giving the indices of those bits that are set;
     i.e., p[] represents the polynomial
          f(t) = t^p[0] + t^p[1] + ... + t^p[k]
     where
          p[0] > p[1] > ... > p[k] = 0.
     This applies to the following functions:

          BN_GF2m_mod_arr
          BN_GF2m_mod_mul_arr
          BN_GF2m_mod_sqr_arr
          BN_GF2m_mod_inv_arr        [wrapper for BN_GF2m_mod_inv]
          BN_GF2m_mod_div_arr        [wrapper for BN_GF2m_mod_div]
          BN_GF2m_mod_exp_arr
          BN_GF2m_mod_sqrt_arr
          BN_GF2m_mod_solve_quad_arr
          BN_GF2m_poly2arr
          BN_GF2m_arr2poly

     Conversion can be performed by the following functions:

          BN_GF2m_poly2arr
          BN_GF2m_arr2poly

     bntest.c has additional tests for binary polynomial arithmetic.

     Two implementations for BN_GF2m_mod_div() are available.
     The default algorithm simply uses BN_GF2m_mod_inv() and
     BN_GF2m_mod_mul().  The alternative algorithm is compiled in only
     if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
     copyright notice in crypto/bn/bn_gf2m.c before enabling it).

     [Sheueling Chang Shantz and Douglas Stebila
     (Sun Microsystems Laboratories)]

  *) Add new error code 'ERR_R_DISABLED' that can be used when some
     functionality is disabled at compile-time.
     [Douglas Stebila <douglas.stebila@sun.com>]

  *) Change default behaviour of 'openssl asn1parse' so that more
     information is visible when viewing, e.g., a certificate:

     Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
     mode the content of non-printable OCTET STRINGs is output in a
     style similar to INTEGERs, but with '[HEX DUMP]' prepended to
     avoid the appearance of a printable string.
     [Nils Larsch <nla@trustcenter.de>]

  *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
     functions
          EC_GROUP_set_asn1_flag()
          EC_GROUP_get_asn1_flag()
          EC_GROUP_set_point_conversion_form()
          EC_GROUP_get_point_conversion_form()
     These control ASN1 encoding details:
     - Curves (i.e., groups) are encoded explicitly unless asn1_flag
       has been set to OPENSSL_EC_NAMED_CURVE.
     - Points are encoded in uncompressed form by default; options for
       asn1_for are as for point2oct, namely
          POINT_CONVERSION_COMPRESSED
          POINT_CONVERSION_UNCOMPRESSED
          POINT_CONVERSION_HYBRID

     Also add 'seed' and 'seed_len' members to EC_GROUP with access
     functions
          EC_GROUP_set_seed()
          EC_GROUP_get0_seed()
          EC_GROUP_get_seed_len()
     This is used only for ASN1 purposes (so far).
     [Nils Larsch <nla@trustcenter.de>]

  *) Add 'field_type' member to EC_METHOD, which holds the NID
     of the appropriate field type OID.  The new function
     EC_METHOD_get_field_type() returns this value.
     [Nils Larsch <nla@trustcenter.de>]

  *) Add functions 
          EC_POINT_point2bn()
          EC_POINT_bn2point()
          EC_POINT_point2hex()
          EC_POINT_hex2point()
     providing useful interfaces to EC_POINT_point2oct() and
     EC_POINT_oct2point().
     [Nils Larsch <nla@trustcenter.de>]

  *) Change internals of the EC library so that the functions
          EC_GROUP_set_generator()
          EC_GROUP_get_generator()
          EC_GROUP_get_order()
          EC_GROUP_get_cofactor()
     are implemented directly in crypto/ec/ec_lib.c and not dispatched
     to methods, which would lead to unnecessary code duplication when
     adding different types of curves.
     [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]

  *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
     arithmetic, and such that modified wNAFs are generated
     (which avoid length expansion in many cases).
     [Bodo Moeller]

  *) Add a function EC_GROUP_check_discriminant() (defined via
     EC_METHOD) that verifies that the curve discriminant is non-zero.

     Add a function EC_GROUP_check() that makes some sanity tests
     on a EC_GROUP, its generator and order.  This includes
     EC_GROUP_check_discriminant().
     [Nils Larsch <nla@trustcenter.de>]

  *) Add ECDSA in new directory crypto/ecdsa/.

     Add applications 'openssl ecparam' and 'openssl ecdsa'
     (these are based on 'openssl dsaparam' and 'openssl dsa').

     ECDSA support is also included in various other files across the
     library.  Most notably,
     - 'openssl req' now has a '-newkey ecdsa:file' option;
     - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
     - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
       d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
       them suitable for ECDSA where domain parameters must be
       extracted before the specific public key;
     - ECDSA engine support has been added.
     [Nils Larsch <nla@trustcenter.de>]

  *) Include some named elliptic curves, and add OIDs from X9.62,
     SECG, and WAP/WTLS.  The curves can be obtained from the new
     functions
          EC_GROUP_new_by_nid()
          EC_GROUP_new_by_name()
     Also add a 'curve_name' member to EC_GROUP objects, which can be
     accessed via
         EC_GROUP_set_nid()
         EC_GROUP_get_nid()
     [Nils Larsch <nla@trustcenter.de, Bodo Moeller]
 
 Changes between 0.9.6g and 0.9.7  [XX xxx 2002]

  *) Make sure tests can be performed even if the corresponding algorithms
     have been removed entirely.  This was also the last step to make
     OpenSSL compilable with DJGPP under all reasonable conditions.
     [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]

  *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
     to allow version independent disabling of normally unselected ciphers,
     which may be activated as a side-effect of selecting a single cipher.

     (E.g., cipher list string "RSA" enables ciphersuites that are left
     out of "ALL" because they do not provide symmetric encryption.
     "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
     [Lutz Jaenicke, Bodo Moeller]

  *) Add appropriate support for separate platform-dependent build
     directories.  The recommended way to make a platform-dependent
     build directory is the following (tested on Linux), maybe with
     some local tweaks:

	# Place yourself outside of the OpenSSL source tree.  In
	# this example, the environment variable OPENSSL_SOURCE
	# is assumed to contain the absolute OpenSSL source directory.
	mkdir -p objtree/`uname -s`-`uname -r`-`uname -m`
	cd objtree/`uname -s`-`uname -r`-`uname -m`
	(cd $OPENSSL_SOURCE; find . -type f -o -type l) | while read F; do
		mkdir -p `dirname $F`
		ln -s $OPENSSL_SOURCE/$F $F
	done

     To be absolutely sure not to disturb the source tree, a "make clean"
     is a good thing.  If it isn't successfull, don't worry about it,
     it probably means the source directory is very clean.
     [Richard Levitte]

  *) Make sure any ENGINE control commands make local copies of string
     pointers passed to them whenever necessary. Otherwise it is possible
     the caller may have overwritten (or deallocated) the original string
     data when a later ENGINE operation tries to use the stored values.
Commit	Line	Data
81a6c781	1
f1c236f8	2	OpenSSL CHANGES
651d0aff RE	3	_______________
651d0aff RE	4
4d94ae00 BM	5	Changes between 0.9.7 and 0.9.8 [xx XXX 2002]
4d94ae00 BM	6
ea262260 BM	7	*) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
	8	As these are not official, they are not included in "ALL";
	9	the "ECCdraft" ciphersuite group alias can be used to select them.
	10	[Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
	11
	12	TODO: COMPLEMENTOFALL and COMPLEMENTOFDEFAULT do not handle ECCdraft
	13	cipher suites correctly.
	14
e172d60d BM	15	*) Add ECDH engine support.
	16	[Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
	17
	18	*) Add ECDH in new directory crypto/ecdh/.
	19	[Douglas Stebila (Sun Microsystems Laboratories)]
	20
95ecacf8 BM	21	*) Let BN_rand_range() abort with an error after 100 iterations
	22	without success (which indicates a broken PRNG).
	23	[Bodo Moeller]
	24
6fb60a84 BM	25	*) Change BN_mod_sqrt() so that it verifies that the input value
	26	is really the square of the return value. (Previously,
	27	BN_mod_sqrt would show GIGO behaviour.)
	28	[Bodo Moeller]
	29
7793f30e BM	30	*) Add named elliptic curves over binary fields from X9.62, SECG,
	31	and WAP/WTLS; add OIDs that were still missing.
	32
	33	[Sheueling Chang Shantz and Douglas Stebila
	34	(Sun Microsystems Laboratories)]
	35
	36	*) Extend the EC library for elliptic curves over binary fields
	37	(new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
	38	New EC_METHOD:
	39
	40	EC_GF2m_simple_method
	41
	42	New API functions:
	43
	44	EC_GROUP_new_curve_GF2m
	45	EC_GROUP_set_curve_GF2m
	46	EC_GROUP_get_curve_GF2m
7793f30e BM	47	EC_POINT_set_affine_coordinates_GF2m
	48	EC_POINT_get_affine_coordinates_GF2m
	49	EC_POINT_set_compressed_coordinates_GF2m
	50
	51	Point compression for binary fields is disabled by default for
	52	patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
	53	enable it).
	54
	55	As binary polynomials are represented as BIGNUMs, various members
	56	of the EC_GROUP and EC_POINT data structures can be shared
	57	between the implementations for prime fields and binary fields;
	58	the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
	59	are essentially identical to their ..._GFp counterparts.
9e4f9b36 BM	60	(For simplicity, the '..._GFp' prefix has been dropped from
9e4f9b36 BM	61	various internal method names.)
7793f30e BM	62
	63	An internal 'field_div' method (similar to 'field_mul' and
	64	'field_sqr') has been added; this is used only for binary fields.
	65
	66	[Sheueling Chang Shantz and Douglas Stebila
	67	(Sun Microsystems Laboratories)]
	68
9e4f9b36	69	*) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
7793f30e BM	70	through methods ('mul', 'precompute_mult').
	71
	72	The generic implementations (now internally called 'ec_wNAF_mul'
	73	and 'ec_wNAF_precomputed_mult') remain the default if these
	74	methods are undefined.
	75
	76	[Sheueling Chang Shantz and Douglas Stebila
	77	(Sun Microsystems Laboratories)]
	78
	79	*) New function EC_GROUP_get_degree, which is defined through
	80	EC_METHOD. For curves over prime fields, this returns the bit
	81	length of the modulus.
	82
	83	[Sheueling Chang Shantz and Douglas Stebila
	84	(Sun Microsystems Laboratories)]
	85
	86	*) New functions EC_GROUP_dup, EC_POINT_dup.
	87	(These simply call ..._new and ..._copy).
	88
	89	[Sheueling Chang Shantz and Douglas Stebila
	90	(Sun Microsystems Laboratories)]
	91
1dc920c8 BM	92	*) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
	93	Polynomials are represented as BIGNUMs (where the sign bit is not
	94	used) in the following functions [macros]:
	95
	96	BN_GF2m_add
	97	BN_GF2m_sub [= BN_GF2m_add]
	98	BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
	99	BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
	100	BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
	101	BN_GF2m_mod_inv
	102	BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
	103	BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
	104	BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
	105	BN_GF2m_cmp [= BN_ucmp]
	106
	107	(Note that only the 'mod' functions are actually for fields GF(2^m).
	108	BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
	109
	110	For some functions, an the irreducible polynomial defining a
	111	field can be given as an 'unsigned int[]' with strictly
	112	decreasing elements giving the indices of those bits that are set;
	113	i.e., p[] represents the polynomial
	114	f(t) = t^p[0] + t^p[1] + ... + t^p[k]
	115	where
	116	p[0] > p[1] > ... > p[k] = 0.
	117	This applies to the following functions:
	118
	119	BN_GF2m_mod_arr
	120	BN_GF2m_mod_mul_arr
	121	BN_GF2m_mod_sqr_arr
	122	BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
	123	BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
	124	BN_GF2m_mod_exp_arr
	125	BN_GF2m_mod_sqrt_arr
	126	BN_GF2m_mod_solve_quad_arr
	127	BN_GF2m_poly2arr
	128	BN_GF2m_arr2poly
	129
	130	Conversion can be performed by the following functions:
	131
	132	BN_GF2m_poly2arr
	133	BN_GF2m_arr2poly
	134
	135	bntest.c has additional tests for binary polynomial arithmetic.
	136
909abce8 BM	137	Two implementations for BN_GF2m_mod_div() are available.
	138	The default algorithm simply uses BN_GF2m_mod_inv() and
	139	BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
	140	if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
	141	copyright notice in crypto/bn/bn_gf2m.c before enabling it).
1dc920c8 BM	142
	143	[Sheueling Chang Shantz and Douglas Stebila
	144	(Sun Microsystems Laboratories)]
	145
16dc1cfb BM	146	*) Add new error code 'ERR_R_DISABLED' that can be used when some
	147	functionality is disabled at compile-time.
	148	[Douglas Stebila <douglas.stebila@sun.com>]
	149
ea4f109c BM	150	*) Change default behaviour of 'openssl asn1parse' so that more
	151	information is visible when viewing, e.g., a certificate:
	152
	153	Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
	154	mode the content of non-printable OCTET STRINGs is output in a
	155	style similar to INTEGERs, but with '[HEX DUMP]' prepended to
	156	avoid the appearance of a printable string.
	157	[Nils Larsch <nla@trustcenter.de>]
	158
254ef80d BM	159	*) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
	160	functions
	161	EC_GROUP_set_asn1_flag()
	162	EC_GROUP_get_asn1_flag()
	163	EC_GROUP_set_point_conversion_form()
	164	EC_GROUP_get_point_conversion_form()
	165	These control ASN1 encoding details:
b8e0e123 BM	166	- Curves (i.e., groups) are encoded explicitly unless asn1_flag
b8e0e123 BM	167	has been set to OPENSSL_EC_NAMED_CURVE.
5f3d6f70	168	- Points are encoded in uncompressed form by default; options for
254ef80d BM	169	asn1_for are as for point2oct, namely
	170	POINT_CONVERSION_COMPRESSED
	171	POINT_CONVERSION_UNCOMPRESSED
	172	POINT_CONVERSION_HYBRID
5f3d6f70 BM	173
	174	Also add 'seed' and 'seed_len' members to EC_GROUP with access
	175	functions
	176	EC_GROUP_set_seed()
	177	EC_GROUP_get0_seed()
	178	EC_GROUP_get_seed_len()
	179	This is used only for ASN1 purposes (so far).
458c2917 BM	180	[Nils Larsch <nla@trustcenter.de>]
	181
	182	*) Add 'field_type' member to EC_METHOD, which holds the NID
	183	of the appropriate field type OID. The new function
	184	EC_METHOD_get_field_type() returns this value.
	185	[Nils Larsch <nla@trustcenter.de>]
	186
6cbe6382 BM	187	*) Add functions
	188	EC_POINT_point2bn()
	189	EC_POINT_bn2point()
	190	EC_POINT_point2hex()
	191	EC_POINT_hex2point()
	192	providing useful interfaces to EC_POINT_point2oct() and
	193	EC_POINT_oct2point().
	194	[Nils Larsch <nla@trustcenter.de>]
	195
b6db386f BM	196	*) Change internals of the EC library so that the functions
	197	EC_GROUP_set_generator()
	198	EC_GROUP_get_generator()
	199	EC_GROUP_get_order()
	200	EC_GROUP_get_cofactor()
	201	are implemented directly in crypto/ec/ec_lib.c and not dispatched
	202	to methods, which would lead to unnecessary code duplication when
	203	adding different types of curves.
6cbe6382	204	[Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
b6db386f	205
47234cd3 BM	206	*) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
	207	arithmetic, and such that modified wNAFs are generated
	208	(which avoid length expansion in many cases).
	209	[Bodo Moeller]
	210
82652aaf BM	211	*) Add a function EC_GROUP_check_discriminant() (defined via
	212	EC_METHOD) that verifies that the curve discriminant is non-zero.
	213
	214	Add a function EC_GROUP_check() that makes some sanity tests
	215	on a EC_GROUP, its generator and order. This includes
	216	EC_GROUP_check_discriminant().
	217	[Nils Larsch <nla@trustcenter.de>]
	218
4d94ae00 BM	219	*) Add ECDSA in new directory crypto/ecdsa/.
4d94ae00 BM	220
5dbd3efc BM	221	Add applications 'openssl ecparam' and 'openssl ecdsa'
5dbd3efc BM	222	(these are based on 'openssl dsaparam' and 'openssl dsa').
4d94ae00 BM	223
	224	ECDSA support is also included in various other files across the
	225	library. Most notably,
	226	- 'openssl req' now has a '-newkey ecdsa:file' option;
	227	- EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
	228	- X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
	229	d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
	230	them suitable for ECDSA where domain parameters must be
e172d60d BM	231	extracted before the specific public key;
e172d60d BM	232	- ECDSA engine support has been added.
f8e21776	233	[Nils Larsch <nla@trustcenter.de>]
4d94ae00	234
af28dd6c BM	235	*) Include some named elliptic curves, and add OIDs from X9.62,
	236	SECG, and WAP/WTLS. The curves can be obtained from the new
	237	functions
4d94ae00 BM	238	EC_GROUP_new_by_nid()
4d94ae00 BM	239	EC_GROUP_new_by_name()
254ef80d BM	240	Also add a 'curve_name' member to EC_GROUP objects, which can be
254ef80d BM	241	accessed via
4d94ae00 BM	242	EC_GROUP_set_nid()
	243	EC_GROUP_get_nid()
	244	[Nils Larsch <nla@trustcenter.de, Bodo Moeller]
	245
fbe792f0	246	Changes between 0.9.6g and 0.9.7 [XX xxx 2002]
dc014d43	247
f013c7f2 RL	248	*) Make sure tests can be performed even if the corresponding algorithms
	249	have been removed entirely. This was also the last step to make
	250	OpenSSL compilable with DJGPP under all reasonable conditions.
	251	[Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
	252
648765ba	253	*) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
c6ccf055 LJ	254	to allow version independent disabling of normally unselected ciphers,
c6ccf055 LJ	255	which may be activated as a side-effect of selecting a single cipher.
648765ba BM	256
	257	(E.g., cipher list string "RSA" enables ciphersuites that are left
	258	out of "ALL" because they do not provide symmetric encryption.
	259	"RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
c6ccf055 LJ	260	[Lutz Jaenicke, Bodo Moeller]
c6ccf055 LJ	261
041843e4 RL	262	*) Add appropriate support for separate platform-dependent build
	263	directories. The recommended way to make a platform-dependent
	264	build directory is the following (tested on Linux), maybe with
	265	some local tweaks:
	266
	267	# Place yourself outside of the OpenSSL source tree. In
	268	# this example, the environment variable OPENSSL_SOURCE
	269	# is assumed to contain the absolute OpenSSL source directory.
	270	mkdir -p objtree/`uname -s`-`uname -r`-`uname -m`
	271	cd objtree/`uname -s`-`uname -r`-`uname -m`
	272	(cd $OPENSSL_SOURCE; find . -type f -o -type l) \| while read F; do
	273	mkdir -p `dirname $F`
	274	ln -s $OPENSSL_SOURCE/$F $F
	275	done
	276
	277	To be absolutely sure not to disturb the source tree, a "make clean"
	278	is a good thing. If it isn't successfull, don't worry about it,
	279	it probably means the source directory is very clean.
	280	[Richard Levitte]
	281
a6c6874a GT	282	*) Make sure any ENGINE control commands make local copies of string
	283	pointers passed to them whenever necessary. Otherwise it is possible
	284	the caller may have overwritten (or deallocated) the original string
	285	data when a later ENGINE operation tries to use the stored values.
	286