[thirdparty/openssl.git] / CHANGES


 OpenSSL CHANGES
 _______________

 Changes between 0.9.7 and 0.9.8  [xx XXX 2002]

  *) Extend the BIGNUM API by creating new macros that behave like
     functions

          void BN_set_sign(BIGNUM *a, int neg);
          int BN_get_sign(const BIGNUM *a);

     and avoid the need to access 'a->neg' directly in applications.
     [Nils Larsch  <nla@trustcenter.de>]

  *) Implement fast modular reduction for pseudo-Mersenne primes
     used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
     EC_GROUP_new_curve_GFp() will now automatically use this
     if applicable.
     [Nils Larsch <nla@trustcenter.de>]

  *) Add new lock type (CRYPTO_LOCK_BN).
     [Bodo Moeller]

  *) Change the ENGINE framework to automatically load engines
     dynamically from specific directories unless they could be
     found to already be built in or loaded.  Move all the
     current engines except for the cryptodev one to a new
     directory engines/.
     The engines in engines/ are built as shared libraries if
     the "shared" options was given to ./Configure or ./config.
     Otherwise, they are inserted in libcrypto.a.
     /usr/local/ssl/engines is the default directory for dynamic
     engines, but that can be overriden at configure time through
     the usual use of --prefix and/or --openssldir, and at run
     time with the environment variable OPENSSL_ENGINES.
     [Geoff Thorpe and Richard Levitte]

  *) Add Makefile.shared, a helper makefile to build shared
     libraries.  Addapt Makefile.org.
     [Richard Levitte]

  *) Add version info to Win32 DLLs.
     [Peter 'Luna' Runestig" <peter@runestig.com>]

  *) Add new 'medium level' PKCS#12 API. Certificates and keys
     can be added using this API to created arbitrary PKCS#12
     files while avoiding the low level API.

     New options to PKCS12_create(), key or cert can be NULL and
     will then be omitted from the output file. The encryption
     algorithm NIDs can be set to -1 for no encryption, the mac
     iteration count can be set to 0 to omit the mac.

     Enhance pkcs12 utility by making the -nokeys and -nocerts
     options work when creating a PKCS#12 file. New option -nomac
     to omit the mac, NONE can be set for an encryption algorithm.
     New code is modified to use the enhanced PKCS12_create()
     instead of the low level API.
     [Steve Henson]

  *) Extend ASN1 encoder to support indefinite length constructed
     encoding. This can output sequences tags and octet strings in
     this form. Modify pk7_asn1.c to support indefinite length
     encoding. This is experimental and needs additional code to
     be useful, such as an ASN1 bio and some enhanced streaming
     PKCS#7 code.

     Extend template encode functionality so that tagging is passed
     down to the template encoder.
     [Steve Henson]

  *) Let 'openssl req' fail if an argument to '-newkey' is not
     recognized instead of using RSA as a default.
     [Bodo Moeller]

  *) 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)]

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

  *) Add ECDH in new directory crypto/ecdh/.
TODO: more general interface (return  x  coordinate, not its hash)
TODO: bug: pad  x  with leading zeros if necessary
     [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.  Each curve can be obtained from the new
     function
          EC_GROUP_new_by_nid(),
     and the list of available named curves can be obtained with
          EC_get_builtin_curves().
     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 0.9.6h and 0.9.7  [XX xxx 2002]

  *) Introduce safe string copy and catenation functions
     (BUF_strlcpy() and BUF_strlcat()).
     [Ben Laurie (CHATS) and Richard Levitte]

  *) Avoid using fixed-size buffers for one-line DNs.
     [Ben Laurie (CHATS)]

  *) Add BUF_MEM_grow_clean() to avoid information leakage when
     resizing buffers containing secrets, and use where appropriate.
     [Ben Laurie (CHATS)]

  *) Avoid using fixed size buffers for configuration file location.
     [Ben Laurie (CHATS)]

  *) Avoid filename truncation for various CA files.
     [Ben Laurie (CHATS)]

  *) Use sizeof in preference to magic numbers.
     [Ben Laurie (CHATS)]

  *) Avoid filename truncation in cert requests.
     [Ben Laurie (CHATS)]

  *) Add assertions to check for (supposedly impossible) buffer
     overflows.
     [Ben Laurie (CHATS)]

  *) Don't cache truncated DNS entries in the local cache (this could
     potentially lead to a spoofing attack).
     [Ben Laurie (CHATS)]

  *) Fix various buffers to be large enough for hex/decimal
     representations in a platform independent manner.
     [Ben Laurie (CHATS)]

  *) Add CRYPTO_realloc_clean() to avoid information leakage when
     resizing buffers containing secrets, and use where appropriate.
     [Ben Laurie (CHATS)]

  *) Add BIO_indent() to avoid much slightly worrying code to do
     indents.
     [Ben Laurie (CHATS)]

  *) Convert sprintf()/BIO_puts() to BIO_printf().
     [Ben Laurie (CHATS)]

  *) buffer_gets() could terminate with the buffer only half
     full. Fixed.
     [Ben Laurie (CHATS)]

  *) Add assertions to prevent user-supplied crypto functions from
     overflowing internal buffers by having large block sizes, etc.
     [Ben Laurie (CHATS)]

  *) New OPENSSL_assert() macro (similar to assert(), but enabled
     unconditionally).
     [Ben Laurie (CHATS)]

  *) Eliminate unused copy of key in RC4.
     [Ben Laurie (CHATS)]

  *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
     [Ben Laurie (CHATS)]

  *) Fix off-by-one error in EGD path.
     [Ben Laurie (CHATS)]

  *) If RANDFILE path is too long, ignore instead of truncating.
     [Ben Laurie (CHATS)]

  *) Eliminate unused and incorrectly sized X.509 structure
     CBCParameter.
     [Ben Laurie (CHATS)]

  *) Eliminate unused and dangerous function knumber().
     [Ben Laurie (CHATS)]

  *) Eliminate unused and dangerous structure, KSSL_ERR.
     [Ben Laurie (CHATS)]

  *) Protect against overlong session ID context length in an encoded
     session object. Since these are local, this does not appear to be
     exploitable.
     [Ben Laurie (CHATS)]

  *) Change from security patch (see 0.9.6e below) that did not affect
     the 0.9.6 release series:

     Remote buffer overflow in SSL3 protocol - an attacker could
     supply an oversized master key in Kerberos-enabled versions.
     (CAN-2002-0657)
     [Ben Laurie (CHATS)]

  *) Change the SSL kerb5 codes to match RFC 2712.
     [Richard Levitte]

  *) Make -nameopt work fully for req and add -reqopt switch.
     [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]

  *) The "block size" for block ciphers in CFB and OFB mode should be 1.
     [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]

  *) 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
b53e44e5 BM	7	*) Extend the BIGNUM API by creating new macros that behave like
	8	functions
	9
	10	void BN_set_sign(BIGNUM *a, int neg);
	11	int BN_get_sign(const BIGNUM *a);
	12
	13	and avoid the need to access 'a->neg' directly in applications.
	14	[Nils Larsch <nla@trustcenter.de>]
	15
5c6bf031 BM	16	*) Implement fast modular reduction for pseudo-Mersenne primes
	17	used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
	18	EC_GROUP_new_curve_GFp() will now automatically use this
	19	if applicable.
	20	[Nils Larsch <nla@trustcenter.de>]
	21
19b8d06a BM	22	*) Add new lock type (CRYPTO_LOCK_BN).
	23	[Bodo Moeller]
	24
6f7c2cb3 RL	25	*) Change the ENGINE framework to automatically load engines
	26	dynamically from specific directories unless they could be
	27	found to already be built in or loaded. Move all the
	28	current engines except for the cryptodev one to a new
	29	directory engines/.
	30	The engines in engines/ are built as shared libraries if
	31	the "shared" options was given to ./Configure or ./config.
	32	Otherwise, they are inserted in libcrypto.a.
	33	/usr/local/ssl/engines is the default directory for dynamic
874fee47 RL	34	engines, but that can be overriden at configure time through
	35	the usual use of --prefix and/or --openssldir, and at run
	36	time with the environment variable OPENSSL_ENGINES.
6f7c2cb3 RL	37	[Geoff Thorpe and Richard Levitte]
6f7c2cb3 RL	38
30afcc07 RL	39	*) Add Makefile.shared, a helper makefile to build shared
	40	libraries. Addapt Makefile.org.
	41	[Richard Levitte]
	42
fc6a6a10 DSH	43	*) Add version info to Win32 DLLs.
	44	[Peter 'Luna' Runestig" <peter@runestig.com>]
	45
9a48b07e DSH	46	*) Add new 'medium level' PKCS#12 API. Certificates and keys
	47	can be added using this API to created arbitrary PKCS#12
	48	files while avoiding the low level API.
	49
	50	New options to PKCS12_create(), key or cert can be NULL and
	51	will then be omitted from the output file. The encryption
	52	algorithm NIDs can be set to -1 for no encryption, the mac
	53	iteration count can be set to 0 to omit the mac.
	54
	55	Enhance pkcs12 utility by making the -nokeys and -nocerts
	56	options work when creating a PKCS#12 file. New option -nomac
	57	to omit the mac, NONE can be set for an encryption algorithm.
	58	New code is modified to use the enhanced PKCS12_create()
	59	instead of the low level API.
	60	[Steve Henson]
	61
230fd6b7 DSH	62	*) Extend ASN1 encoder to support indefinite length constructed
	63	encoding. This can output sequences tags and octet strings in
	64	this form. Modify pk7_asn1.c to support indefinite length
	65	encoding. This is experimental and needs additional code to
	66	be useful, such as an ASN1 bio and some enhanced streaming
	67	PKCS#7 code.
	68
	69	Extend template encode functionality so that tagging is passed
	70	down to the template encoder.
	71	[Steve Henson]
	72
9226e218 BM	73	*) Let 'openssl req' fail if an argument to '-newkey' is not
	74	recognized instead of using RSA as a default.
	75	[Bodo Moeller]
	76
ea262260 BM	77	*) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
	78	As these are not official, they are not included in "ALL";
	79	the "ECCdraft" ciphersuite group alias can be used to select them.
	80	[Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
	81
e172d60d BM	82	*) Add ECDH engine support.
	83	[Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
	84
	85	*) Add ECDH in new directory crypto/ecdh/.
49a0f778 BM	86	TODO: more general interface (return x coordinate, not its hash)
49a0f778 BM	87	TODO: bug: pad x with leading zeros if necessary
e172d60d BM	88	[Douglas Stebila (Sun Microsystems Laboratories)]
e172d60d BM	89
95ecacf8 BM	90	*) Let BN_rand_range() abort with an error after 100 iterations
	91	without success (which indicates a broken PRNG).
	92	[Bodo Moeller]
	93
6fb60a84 BM	94	*) Change BN_mod_sqrt() so that it verifies that the input value
	95	is really the square of the return value. (Previously,
	96	BN_mod_sqrt would show GIGO behaviour.)
	97	[Bodo Moeller]
	98
7793f30e BM	99	*) Add named elliptic curves over binary fields from X9.62, SECG,
	100	and WAP/WTLS; add OIDs that were still missing.
	101
	102	[Sheueling Chang Shantz and Douglas Stebila
	103	(Sun Microsystems Laboratories)]
	104
	105	*) Extend the EC library for elliptic curves over binary fields
	106	(new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
	107	New EC_METHOD:
	108
	109	EC_GF2m_simple_method
	110
	111	New API functions:
	112
	113	EC_GROUP_new_curve_GF2m
	114	EC_GROUP_set_curve_GF2m
	115	EC_GROUP_get_curve_GF2m
7793f30e BM	116	EC_POINT_set_affine_coordinates_GF2m
	117	EC_POINT_get_affine_coordinates_GF2m
	118	EC_POINT_set_compressed_coordinates_GF2m
	119
	120	Point compression for binary fields is disabled by default for
	121	patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
	122	enable it).
	123
	124	As binary polynomials are represented as BIGNUMs, various members
	125	of the EC_GROUP and EC_POINT data structures can be shared
	126	between the implementations for prime fields and binary fields;
	127	the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
	128	are essentially identical to their ..._GFp counterparts.
9e4f9b36 BM	129	(For simplicity, the '..._GFp' prefix has been dropped from
9e4f9b36 BM	130	various internal method names.)
7793f30e BM	131
	132	An internal 'field_div' method (similar to 'field_mul' and
	133	'field_sqr') has been added; this is used only for binary fields.
	134
	135	[Sheueling Chang Shantz and Douglas Stebila
	136	(Sun Microsystems Laboratories)]
	137
9e4f9b36	138	*) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
7793f30e BM	139	through methods ('mul', 'precompute_mult').
	140
	141	The generic implementations (now internally called 'ec_wNAF_mul'
	142	and 'ec_wNAF_precomputed_mult') remain the default if these
	143	methods are undefined.
	144
	145	[Sheueling Chang Shantz and Douglas Stebila
	146	(Sun Microsystems Laboratories)]
	147
	148	*) New function EC_GROUP_get_degree, which is defined through
	149	EC_METHOD. For curves over prime fields, this returns the bit
	150	length of the modulus.
	151
	152	[Sheueling Chang Shantz and Douglas Stebila
	153	(Sun Microsystems Laboratories)]
	154
	155	*) New functions EC_GROUP_dup, EC_POINT_dup.
	156	(These simply call ..._new and ..._copy).
	157
	158	[Sheueling Chang Shantz and Douglas Stebila
	159	(Sun Microsystems Laboratories)]
	160
1dc920c8 BM	161	*) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
	162	Polynomials are represented as BIGNUMs (where the sign bit is not
	163	used) in the following functions [macros]:
	164
	165	BN_GF2m_add
	166	BN_GF2m_sub [= BN_GF2m_add]
	167	BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
	168	BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
	169	BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
	170	BN_GF2m_mod_inv
	171	BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
	172	BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
	173	BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
	174	BN_GF2m_cmp [= BN_ucmp]
	175
	176	(Note that only the 'mod' functions are actually for fields GF(2^m).
	177	BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
	178
	179	For some functions, an the irreducible polynomial defining a
	180	field can be given as an 'unsigned int[]' with strictly
	181	decreasing elements giving the indices of those bits that are set;
	182	i.e., p[] represents the polynomial
	183	f(t) = t^p[0] + t^p[1] + ... + t^p[k]
	184	where
	185	p[0] > p[1] > ... > p[k] = 0.
	186	This applies to the following functions:
	187
	188	BN_GF2m_mod_arr
	189	BN_GF2m_mod_mul_arr
	190	BN_GF2m_mod_sqr_arr
	191	BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
	192	BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
	193	BN_GF2m_mod_exp_arr
	194	BN_GF2m_mod_sqrt_arr
	195	BN_GF2m_mod_solve_quad_arr
	196	BN_GF2m_poly2arr
	197	BN_GF2m_arr2poly
	198
	199	Conversion can be performed by the following functions:
	200
	201	BN_GF2m_poly2arr
	202	BN_GF2m_arr2poly
	203
	204	bntest.c has additional tests for binary polynomial arithmetic.
	205
909abce8 BM	206	Two implementations for BN_GF2m_mod_div() are available.
	207	The default algorithm simply uses BN_GF2m_mod_inv() and
	208	BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
	209	if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
	210	copyright notice in crypto/bn/bn_gf2m.c before enabling it).
1dc920c8 BM	211
	212	[Sheueling Chang Shantz and Douglas Stebila
	213	(Sun Microsystems Laboratories)]
	214
16dc1cfb BM	215	*) Add new error code 'ERR_R_DISABLED' that can be used when some
	216	functionality is disabled at compile-time.
	217	[Douglas Stebila <douglas.stebila@sun.com>]
	218
ea4f109c BM	219	*) Change default behaviour of 'openssl asn1parse' so that more
	220	information is visible when viewing, e.g., a certificate:
	221
	222	Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
	223	mode the content of non-printable OCTET STRINGs is output in a
	224	style similar to INTEGERs, but with '[HEX DUMP]' prepended to
	225	avoid the appearance of a printable string.
	226	[Nils Larsch <nla@trustcenter.de>]
	227
254ef80d BM	228	*) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
	229	functions
	230	EC_GROUP_set_asn1_flag()
	231	EC_GROUP_get_asn1_flag()
	232	EC_GROUP_set_point_conversion_form()
	233	EC_GROUP_get_point_conversion_form()
	234	These control ASN1 encoding details:
b8e0e123 BM	235	- Curves (i.e., groups) are encoded explicitly unless asn1_flag
b8e0e123 BM	236	has been set to OPENSSL_EC_NAMED_CURVE.
5f3d6f70	237	- Points are encoded in uncompressed form by default; options for
254ef80d BM	238	asn1_for are as for point2oct, namely
	239	POINT_CONVERSION_COMPRESSED
	240	POINT_CONVERSION_UNCOMPRESSED
	241	POINT_CONVERSION_HYBRID
5f3d6f70 BM	242
	243	Also add 'seed' and 'seed_len' members to EC_GROUP with access
	244	functions
	245	EC_GROUP_set_seed()
	246	EC_GROUP_get0_seed()
	247	EC_GROUP_get_seed_len()
	248	This is used only for ASN1 purposes (so far).
458c2917 BM	249	[Nils Larsch <nla@trustcenter.de>]
	250
	251	*) Add 'field_type' member to EC_METHOD, which holds the NID
	252	of the appropriate field type OID. The new function
	253	EC_METHOD_get_field_type() returns this value.
	254	[Nils Larsch <nla@trustcenter.de>]
	255
6cbe6382 BM	256	*) Add functions
	257	EC_POINT_point2bn()
	258	EC_POINT_bn2point()
	259	EC_POINT_point2hex()
	260	EC_POINT_hex2point()
	261	providing useful interfaces to EC_POINT_point2oct() and
	262	EC_POINT_oct2point().
	263	[Nils Larsch <nla@trustcenter.de>]
	264
b6db386f BM	265	*) Change internals of the EC library so that the functions
	266	EC_GROUP_set_generator()
	267	EC_GROUP_get_generator()
	268	EC_GROUP_get_order()
	269	EC_GROUP_get_cofactor()
	270	are implemented directly in crypto/ec/ec_lib.c and not dispatched
	271	to methods, which would lead to unnecessary code duplication when
	272	adding different types of curves.
6cbe6382	273	[Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
b6db386f	274
47234cd3 BM	275	*) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
	276	arithmetic, and such that modified wNAFs are generated
	277	(which avoid length expansion in many cases).
	278	[Bodo Moeller]
	279
82652aaf BM	280	*) Add a function EC_GROUP_check_discriminant() (defined via
	281	EC_METHOD) that verifies that the curve discriminant is non-zero.
	282
	283	Add a function EC_GROUP_check() that makes some sanity tests
	284	on a EC_GROUP, its generator and order. This includes
	285	EC_GROUP_check_discriminant().
	286	[Nils Larsch <nla@trustcenter.de>]
	287
4d94ae00 BM	288	*) Add ECDSA in new directory crypto/ecdsa/.
4d94ae00 BM	289
5dbd3efc BM	290	Add applications 'openssl ecparam' and 'openssl ecdsa'
5dbd3efc BM	291	(these are based on 'openssl dsaparam' and 'openssl dsa').
4d94ae00 BM	292
	293	ECDSA support is also included in various other files across the
	294	library. Most notably,
	295	- 'openssl req' now has a '-newkey ecdsa:file' option;
	296	- EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
	297	- X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
	298	d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
	299	them suitable for ECDSA where domain parameters must be
e172d60d BM	300	extracted before the specific public key;
e172d60d BM	301	- ECDSA engine support has been added.
f8e21776	302	[Nils Larsch <nla@trustcenter.de>]
4d94ae00	303
af28dd6c	304	*) Include some named elliptic curves, and add OIDs from X9.62,
ed5e37c3	305	SECG, and WAP/WTLS. Each curve can be obtained from the new
7eb18f12	306	function
ed5e37c3 BM	307	EC_GROUP_new_by_nid(),
	308	and the list of available named curves can be obtained with
	309	EC_get_builtin_curves().
254ef80d BM	310	Also add a 'curve_name' member to EC_GROUP objects, which can be
254ef80d BM	311	accessed via
4d94ae00 BM	312	EC_GROUP_set_nid()
	313	EC_GROUP_get_nid()
	314	[Nils Larsch <nla@trustcenter.de, Bodo Moeller]
	315
3e06fb75 BM	316	Changes between 0.9.6h and 0.9.7 [XX xxx 2002]
3e06fb75 BM	317
54a656ef BL	318	*) Introduce safe string copy and catenation functions
	319	(BUF_strlcpy() and BUF_strlcat()).
	320	[Ben Laurie (CHATS) and Richard Levitte]
	321
	322	*) Avoid using fixed-size buffers for one-line DNs.
	323	[Ben Laurie (CHATS)]
	324
	325	*) Add BUF_MEM_grow_clean() to avoid information leakage when
	326	resizing buffers containing secrets, and use where appropriate.
	327	[Ben Laurie (CHATS)]
	328
	329	*) Avoid using fixed size buffers for configuration file location.
	330	[Ben Laurie (CHATS)]
	331
	332	*) Avoid filename truncation for various CA files.
	333	[Ben Laurie (CHATS)]
	334
	335	*) Use sizeof in preference to magic numbers.
	336	[Ben Laurie (CHATS)]
	337
	338	*) Avoid filename truncation in cert requests.
	339	[Ben Laurie (CHATS)]
	340
54a656ef BL	341	*) Add assertions to check for (supposedly impossible) buffer
	342	overflows.
	343	[Ben Laurie (CHATS)]
	344
	345	*) Don't cache truncated DNS entries in the local cache (this could
	346	potentially lead to a spoofing attack).
	347	[Ben Laurie (CHATS)]
	348
	349	*) Fix various buffers to be large enough for hex/decimal
	350	representations in a platform independent manner.
	351	[Ben Laurie (CHATS)]
	352
	353	*) Add CRYPTO_realloc_clean() to avoid information leakage when
	354	resizing buffers containing secrets, and use where appropriate.
	355	[Ben Laurie (CHATS)]
	356
	357	*) Add BIO_indent() to avoid much slightly worrying code to do
	358	indents.
	359	[Ben Laurie (CHATS)]
	360
	361	*) Convert sprintf()/BIO_puts() to BIO_printf().
	362	[Ben Laurie (CHATS)]
	363
	364	*) buffer_gets() could terminate with the buffer only half
	365	full. Fixed.
	366	[Ben Laurie (CHATS)]
	367
	368	*) Add assertions to prevent user-supplied crypto functions from
	369	overflowing internal buffers by having large block sizes, etc.
	370	[Ben Laurie (CHATS)]
	371
2b2ab523 BM	372	*) New OPENSSL_assert() macro (similar to assert(), but enabled
	373	unconditionally).
	374	[Ben Laurie (CHATS)]
	375
54a656ef BL	376	*) Eliminate unused copy of key in RC4.
	377	[Ben Laurie (CHATS)]
	378
	379	*) Eliminate unused and incorrectly sized buffers for IV in pem.h.
	380	[Ben Laurie (CHATS)]
	381
	382	*) Fix off-by-one error in EGD path.
	383	[Ben Laurie (CHATS)]
	384
	385	*) If RANDFILE path is too long, ignore instead of truncating.
	386	[Ben Laurie (CHATS)]
	387
	388	*) Eliminate unused and incorrectly sized X.509 structure
	389	CBCParameter.
	390	[Ben Laurie (CHATS)]
	391
	392	*) Eliminate unused and dangerous function knumber().
	393	[Ben Laurie (CHATS)]
	394
	395	*) Eliminate unused and dangerous structure, KSSL_ERR.
	396	[Ben Laurie (CHATS)]
	397
	398	*) Protect against overlong session ID context length in an encoded
	399	session object. Since these are local, this does not appear to be
	400	exploitable.
	401	[Ben Laurie (CHATS)]
	402
3e06fb75 BM	403	*) Change from security patch (see 0.9.6e below) that did not affect
	404	the 0.9.6 release series:
	405
	406	Remote buffer overflow in SSL3 protocol - an attacker could
	407	supply an oversized master key in Kerberos-enabled versions.
	408	(CAN-2002-0657)
	409	[Ben Laurie (CHATS)]
dc014d43	410
7ba3a4c3 RL	411	*) Change the SSL kerb5 codes to match RFC 2712.
	412	[Richard Levitte]
	413
ba111217 BM	414	*) Make -nameopt work fully for req and add -reqopt switch.
	415	[Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
	416
3f6db7f5 DSH	417	*) The "block size" for block ciphers in CFB and OFB mode should be 1.
	418	[Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
	419
f013c7f2 RL	420	*) Make sure tests can be performed even if the corresponding algorithms
	421	have been removed entirely. This was also the last step to make
	422	OpenSSL compilable with DJGPP under all reasonable conditions.
	423	[Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
	424
648765ba	425	*) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
c6ccf055 LJ	426	to allow version independent disabling of normally unselected ciphers,
c6ccf055 LJ	427	which may be activated as a side-effect of selecting a single cipher.
648765ba BM	428
	429	(E.g., cipher list string "RSA" enables ciphersuites that are left
	430	out of "ALL" because they do not provide symmetric encryption.
	431	"RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
c6ccf055 LJ	432	[Lutz Jaenicke, Bodo Moeller]
c6ccf055 LJ	433
041843e4 RL	434	*) Add appropriate support for separate platform-dependent build
	435	directories. The recommended way to make a platform-dependent
	436	build directory is the following (tested on Linux), maybe with
	437	some local tweaks:
	438
	439	# Place yourself outside of the OpenSSL source tree. In
	440	# this example, the environment variable OPENSSL_SOURCE
	441	# is assumed to contain the absolute OpenSSL source directory.
3e06fb75 BM	442	mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
3e06fb75 BM	443	cd objtree/"`uname -s`-`uname -r`-`uname -m`"
041843e4 RL	444	(cd $OPENSSL_SOURCE; find . -type f -o -type l) \| while read F; do
	445	mkdir -p `dirname $F`
	446	ln -s $OPENSSL_SOURCE/$F $F
	447	done
	448
	449	To be absolutely sure not to disturb the source tree, a "make clean"
	450	is a good thing. If it isn't successfull, don't worry about it,
	451	it probably means the source directory is very clean.
	452	[Richard Levitte]
	453
a6c6874a GT	454	*) Make sure any ENGINE control commands make local copies of string
	455	pointers passed to them whenever necessary. Otherwise it is possible
	456	the caller may have overwritten (or deallocated) the original string
	457	data when a later ENGINE operation tries to use the stored values.
	458