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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/crypto/ecdh/ech_ossl.c | |
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Checked in the following released items:
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font-sony-misc-1.0.0.tar.gz
font-schumacher-misc-1.0.0.tar.gz
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font-misc-meltho-1.0.0.tar.gz
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font-dec-misc-1.0.0.tar.gz
font-daewoo-misc-1.0.0.tar.gz
font-cursor-misc-1.0.0.tar.gz
font-arabic-misc-1.0.0.tar.gz
font-winitzki-cyrillic-1.0.0.tar.gz
font-misc-cyrillic-1.0.0.tar.gz
font-cronyx-cyrillic-1.0.0.tar.gz
font-screen-cyrillic-1.0.1.tar.gz
font-xfree86-type1-1.0.1.tar.gz
font-adobe-utopia-type1-1.0.1.tar.gz
font-ibm-type1-1.0.0.tar.gz
font-bitstream-type1-1.0.0.tar.gz
font-bitstream-speedo-1.0.0.tar.gz
font-bh-ttf-1.0.0.tar.gz
font-bh-type1-1.0.0.tar.gz
font-bitstream-100dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz
font-bh-100dpi-1.0.0.tar.gz
font-adobe-utopia-100dpi-1.0.1.tar.gz
font-adobe-100dpi-1.0.0.tar.gz
font-util-1.0.1.tar.gz
font-bitstream-75dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz
font-adobe-utopia-75dpi-1.0.1.tar.gz
font-bh-75dpi-1.0.0.tar.gz
bdftopcf-1.0.1.tar.gz
font-adobe-75dpi-1.0.0.tar.gz
mkfontscale-1.0.6.tar.gz
openssl-0.9.8k.tar.gz
bigreqsproto-1.0.2.tar.gz
xtrans-1.2.2.tar.gz
resourceproto-1.0.2.tar.gz
inputproto-1.4.4.tar.gz
compositeproto-0.4.tar.gz
damageproto-1.1.0.tar.gz
zlib-1.2.3.tar.gz
xkbcomp-1.0.5.tar.gz
freetype-2.3.9.tar.gz
pthreads-w32-2-8-0-release.tar.gz
pixman-0.12.0.tar.gz
kbproto-1.0.3.tar.gz
evieext-1.0.2.tar.gz
fixesproto-4.0.tar.gz
recordproto-1.13.2.tar.gz
randrproto-1.2.2.tar.gz
scrnsaverproto-1.1.0.tar.gz
renderproto-0.9.3.tar.gz
xcmiscproto-1.1.2.tar.gz
fontsproto-2.0.2.tar.gz
xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
libxkbfile-1.0.5.tar.gz
libfontenc-1.0.4.tar.gz
libXfont-1.3.4.tar.gz
libX11-1.1.5.tar.gz
libXau-1.0.4.tar.gz
libxcb-1.1.tar.gz
xorg-server-1.5.3.tar.gz
Diffstat (limited to 'openssl/crypto/ecdh/ech_ossl.c')
-rw-r--r-- | openssl/crypto/ecdh/ech_ossl.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/openssl/crypto/ecdh/ech_ossl.c b/openssl/crypto/ecdh/ech_ossl.c new file mode 100644 index 000000000..2a40ff12d --- /dev/null +++ b/openssl/crypto/ecdh/ech_ossl.c @@ -0,0 +1,213 @@ +/* crypto/ecdh/ech_ossl.c */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * + * The Elliptic Curve Public-Key Crypto Library (ECC Code) included + * herein is developed by SUN MICROSYSTEMS, INC., and is contributed + * to the OpenSSL project. + * + * The ECC Code is licensed pursuant to the OpenSSL open source + * license provided below. + * + * The ECDH software is originally written by Douglas Stebila of + * Sun Microsystems Laboratories. + * + */ +/* ==================================================================== + * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + + +#include <string.h> +#include <limits.h> + +#include "cryptlib.h" + +#include "ech_locl.h" +#include <openssl/err.h> +#include <openssl/sha.h> +#include <openssl/obj_mac.h> +#include <openssl/bn.h> + +static int ecdh_compute_key(void *out, size_t len, const EC_POINT *pub_key, + EC_KEY *ecdh, + void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen)); + +static ECDH_METHOD openssl_ecdh_meth = { + "OpenSSL ECDH method", + ecdh_compute_key, +#if 0 + NULL, /* init */ + NULL, /* finish */ +#endif + 0, /* flags */ + NULL /* app_data */ +}; + +const ECDH_METHOD *ECDH_OpenSSL(void) + { + return &openssl_ecdh_meth; + } + + +/* This implementation is based on the following primitives in the IEEE 1363 standard: + * - ECKAS-DH1 + * - ECSVDP-DH + * Finally an optional KDF is applied. + */ +static int ecdh_compute_key(void *out, size_t outlen, const EC_POINT *pub_key, + EC_KEY *ecdh, + void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen)) + { + BN_CTX *ctx; + EC_POINT *tmp=NULL; + BIGNUM *x=NULL, *y=NULL; + const BIGNUM *priv_key; + const EC_GROUP* group; + int ret= -1; + size_t buflen, len; + unsigned char *buf=NULL; + + if (outlen > INT_MAX) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE); /* sort of, anyway */ + return -1; + } + + if ((ctx = BN_CTX_new()) == NULL) goto err; + BN_CTX_start(ctx); + x = BN_CTX_get(ctx); + y = BN_CTX_get(ctx); + + priv_key = EC_KEY_get0_private_key(ecdh); + if (priv_key == NULL) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_NO_PRIVATE_VALUE); + goto err; + } + + group = EC_KEY_get0_group(ecdh); + if ((tmp=EC_POINT_new(group)) == NULL) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE); + goto err; + } + + if (!EC_POINT_mul(group, tmp, NULL, pub_key, priv_key, ctx)) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE); + goto err; + } + + if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) + { + if (!EC_POINT_get_affine_coordinates_GFp(group, tmp, x, y, ctx)) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE); + goto err; + } + } + else + { + if (!EC_POINT_get_affine_coordinates_GF2m(group, tmp, x, y, ctx)) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE); + goto err; + } + } + + buflen = (EC_GROUP_get_degree(group) + 7)/8; + len = BN_num_bytes(x); + if (len > buflen) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_INTERNAL_ERROR); + goto err; + } + if ((buf = OPENSSL_malloc(buflen)) == NULL) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE); + goto err; + } + + memset(buf, 0, buflen - len); + if (len != (size_t)BN_bn2bin(x, buf + buflen - len)) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_BN_LIB); + goto err; + } + + if (KDF != 0) + { + if (KDF(buf, buflen, out, &outlen) == NULL) + { + ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_KDF_FAILED); + goto err; + } + ret = outlen; + } + else + { + /* no KDF, just copy as much as we can */ + if (outlen > buflen) + outlen = buflen; + memcpy(out, buf, outlen); + ret = outlen; + } + +err: + if (tmp) EC_POINT_free(tmp); + if (ctx) BN_CTX_end(ctx); + if (ctx) BN_CTX_free(ctx); + if (buf) OPENSSL_free(buf); + return(ret); + } |