diff options
Diffstat (limited to 'src/crypto/ec/ec.c')
| -rw-r--r-- | src/crypto/ec/ec.c | 856 |
1 files changed, 856 insertions, 0 deletions
diff --git a/src/crypto/ec/ec.c b/src/crypto/ec/ec.c new file mode 100644 index 0000000..f9d8dc5 --- /dev/null +++ b/src/crypto/ec/ec.c @@ -0,0 +1,856 @@ +/* Originally written by Bodo Moeller for the OpenSSL project. + * ==================================================================== + * Copyright (c) 1998-2005 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). + * + */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * + * Portions of the attached software ("Contribution") are developed by + * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. + * + * The Contribution is licensed pursuant to the OpenSSL open source + * license provided above. + * + * The elliptic curve binary polynomial software is originally written by + * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems + * Laboratories. */ + +#include <openssl/ec.h> + +#include <string.h> + +#include <openssl/bn.h> +#include <openssl/err.h> +#include <openssl/mem.h> +#include <openssl/obj.h> + +#include "internal.h" + + +static const struct curve_data P224 = { + "NIST P-224", + 28, + 1, + {/* p */ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x01, + /* a */ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFE, + /* b */ + 0xB4, 0x05, 0x0A, 0x85, 0x0C, 0x04, 0xB3, 0xAB, 0xF5, 0x41, 0x32, 0x56, + 0x50, 0x44, 0xB0, 0xB7, 0xD7, 0xBF, 0xD8, 0xBA, 0x27, 0x0B, 0x39, 0x43, + 0x23, 0x55, 0xFF, 0xB4, + /* x */ + 0xB7, 0x0E, 0x0C, 0xBD, 0x6B, 0xB4, 0xBF, 0x7F, 0x32, 0x13, 0x90, 0xB9, + 0x4A, 0x03, 0xC1, 0xD3, 0x56, 0xC2, 0x11, 0x22, 0x34, 0x32, 0x80, 0xD6, + 0x11, 0x5C, 0x1D, 0x21, + /* y */ + 0xbd, 0x37, 0x63, 0x88, 0xb5, 0xf7, 0x23, 0xfb, 0x4c, 0x22, 0xdf, 0xe6, + 0xcd, 0x43, 0x75, 0xa0, 0x5a, 0x07, 0x47, 0x64, 0x44, 0xd5, 0x81, 0x99, + 0x85, 0x00, 0x7e, 0x34, + /* order */ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0x16, 0xA2, 0xE0, 0xB8, 0xF0, 0x3E, 0x13, 0xDD, 0x29, 0x45, + 0x5C, 0x5C, 0x2A, 0x3D, + }}; + +static const struct curve_data P256 = { + "NIST P-256", + 32, + 1, + {/* p */ + 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + /* a */ + 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, + /* b */ + 0x5A, 0xC6, 0x35, 0xD8, 0xAA, 0x3A, 0x93, 0xE7, 0xB3, 0xEB, 0xBD, 0x55, + 0x76, 0x98, 0x86, 0xBC, 0x65, 0x1D, 0x06, 0xB0, 0xCC, 0x53, 0xB0, 0xF6, + 0x3B, 0xCE, 0x3C, 0x3E, 0x27, 0xD2, 0x60, 0x4B, + /* x */ + 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, + 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, + 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, + /* y */ + 0x4f, 0xe3, 0x42, 0xe2, 0xfe, 0x1a, 0x7f, 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, + 0x7c, 0x0f, 0x9e, 0x16, 0x2b, 0xce, 0x33, 0x57, 0x6b, 0x31, 0x5e, 0xce, + 0xcb, 0xb6, 0x40, 0x68, 0x37, 0xbf, 0x51, 0xf5, + /* order */ + 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, + 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51}}; + +static const struct curve_data P384 = { + "NIST P-384", + 48, + 1, + {/* p */ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, + /* a */ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFC, + /* b */ + 0xB3, 0x31, 0x2F, 0xA7, 0xE2, 0x3E, 0xE7, 0xE4, 0x98, 0x8E, 0x05, 0x6B, + 0xE3, 0xF8, 0x2D, 0x19, 0x18, 0x1D, 0x9C, 0x6E, 0xFE, 0x81, 0x41, 0x12, + 0x03, 0x14, 0x08, 0x8F, 0x50, 0x13, 0x87, 0x5A, 0xC6, 0x56, 0x39, 0x8D, + 0x8A, 0x2E, 0xD1, 0x9D, 0x2A, 0x85, 0xC8, 0xED, 0xD3, 0xEC, 0x2A, 0xEF, + /* x */ + 0xAA, 0x87, 0xCA, 0x22, 0xBE, 0x8B, 0x05, 0x37, 0x8E, 0xB1, 0xC7, 0x1E, + 0xF3, 0x20, 0xAD, 0x74, 0x6E, 0x1D, 0x3B, 0x62, 0x8B, 0xA7, 0x9B, 0x98, + 0x59, 0xF7, 0x41, 0xE0, 0x82, 0x54, 0x2A, 0x38, 0x55, 0x02, 0xF2, 0x5D, + 0xBF, 0x55, 0x29, 0x6C, 0x3A, 0x54, 0x5E, 0x38, 0x72, 0x76, 0x0A, 0xB7, + /* y */ + 0x36, 0x17, 0xde, 0x4a, 0x96, 0x26, 0x2c, 0x6f, 0x5d, 0x9e, 0x98, 0xbf, + 0x92, 0x92, 0xdc, 0x29, 0xf8, 0xf4, 0x1d, 0xbd, 0x28, 0x9a, 0x14, 0x7c, + 0xe9, 0xda, 0x31, 0x13, 0xb5, 0xf0, 0xb8, 0xc0, 0x0a, 0x60, 0xb1, 0xce, + 0x1d, 0x7e, 0x81, 0x9d, 0x7a, 0x43, 0x1d, 0x7c, 0x90, 0xea, 0x0e, 0x5f, + /* order */ + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xC7, 0x63, 0x4D, 0x81, 0xF4, 0x37, 0x2D, 0xDF, 0x58, 0x1A, 0x0D, 0xB2, + 0x48, 0xB0, 0xA7, 0x7A, 0xEC, 0xEC, 0x19, 0x6A, 0xCC, 0xC5, 0x29, 0x73}}; + +static const struct curve_data P521 = { + "NIST P-521", + 66, + 1, + {/* p */ + 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + /* a */ + 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, + /* b */ + 0x00, 0x51, 0x95, 0x3E, 0xB9, 0x61, 0x8E, 0x1C, 0x9A, 0x1F, 0x92, 0x9A, + 0x21, 0xA0, 0xB6, 0x85, 0x40, 0xEE, 0xA2, 0xDA, 0x72, 0x5B, 0x99, 0xB3, + 0x15, 0xF3, 0xB8, 0xB4, 0x89, 0x91, 0x8E, 0xF1, 0x09, 0xE1, 0x56, 0x19, + 0x39, 0x51, 0xEC, 0x7E, 0x93, 0x7B, 0x16, 0x52, 0xC0, 0xBD, 0x3B, 0xB1, + 0xBF, 0x07, 0x35, 0x73, 0xDF, 0x88, 0x3D, 0x2C, 0x34, 0xF1, 0xEF, 0x45, + 0x1F, 0xD4, 0x6B, 0x50, 0x3F, 0x00, + /* x */ + 0x00, 0xC6, 0x85, 0x8E, 0x06, 0xB7, 0x04, 0x04, 0xE9, 0xCD, 0x9E, 0x3E, + 0xCB, 0x66, 0x23, 0x95, 0xB4, 0x42, 0x9C, 0x64, 0x81, 0x39, 0x05, 0x3F, + 0xB5, 0x21, 0xF8, 0x28, 0xAF, 0x60, 0x6B, 0x4D, 0x3D, 0xBA, 0xA1, 0x4B, + 0x5E, 0x77, 0xEF, 0xE7, 0x59, 0x28, 0xFE, 0x1D, 0xC1, 0x27, 0xA2, 0xFF, + 0xA8, 0xDE, 0x33, 0x48, 0xB3, 0xC1, 0x85, 0x6A, 0x42, 0x9B, 0xF9, 0x7E, + 0x7E, 0x31, 0xC2, 0xE5, 0xBD, 0x66, + /* y */ + 0x01, 0x18, 0x39, 0x29, 0x6a, 0x78, 0x9a, 0x3b, 0xc0, 0x04, 0x5c, 0x8a, + 0x5f, 0xb4, 0x2c, 0x7d, 0x1b, 0xd9, 0x98, 0xf5, 0x44, 0x49, 0x57, 0x9b, + 0x44, 0x68, 0x17, 0xaf, 0xbd, 0x17, 0x27, 0x3e, 0x66, 0x2c, 0x97, 0xee, + 0x72, 0x99, 0x5e, 0xf4, 0x26, 0x40, 0xc5, 0x50, 0xb9, 0x01, 0x3f, 0xad, + 0x07, 0x61, 0x35, 0x3c, 0x70, 0x86, 0xa2, 0x72, 0xc2, 0x40, 0x88, 0xbe, + 0x94, 0x76, 0x9f, 0xd1, 0x66, 0x50, + /* order */ + 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFA, 0x51, 0x86, + 0x87, 0x83, 0xBF, 0x2F, 0x96, 0x6B, 0x7F, 0xCC, 0x01, 0x48, 0xF7, 0x09, + 0xA5, 0xD0, 0x3B, 0xB5, 0xC9, 0xB8, 0x89, 0x9C, 0x47, 0xAE, 0xBB, 0x6F, + 0xB7, 0x1E, 0x91, 0x38, 0x64, 0x09}}; + +const struct built_in_curve OPENSSL_built_in_curves[] = { + {NID_secp224r1, &P224, 0}, + {NID_X9_62_prime256v1, &P256, 0}, + {NID_secp384r1, &P384, 0}, + {NID_secp521r1, &P521, 0}, + {NID_undef, 0, 0}, +}; + +EC_GROUP *ec_group_new(const EC_METHOD *meth) { + EC_GROUP *ret; + + if (meth == NULL) { + OPENSSL_PUT_ERROR(EC, ec_group_new, EC_R_SLOT_FULL); + return NULL; + } + + if (meth->group_init == 0) { + OPENSSL_PUT_ERROR(EC, ec_group_new, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return NULL; + } + + ret = OPENSSL_malloc(sizeof(EC_GROUP)); + if (ret == NULL) { + OPENSSL_PUT_ERROR(EC, ec_group_new, ERR_R_MALLOC_FAILURE); + return NULL; + } + memset(ret, 0, sizeof(EC_GROUP)); + + ret->meth = meth; + BN_init(&ret->order); + BN_init(&ret->cofactor); + + if (!meth->group_init(ret)) { + OPENSSL_free(ret); + return NULL; + } + + return ret; +} + +static EC_GROUP *ec_group_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, + const BIGNUM *b, BN_CTX *ctx) { + const EC_METHOD *meth = EC_GFp_mont_method(); + EC_GROUP *ret; + + ret = ec_group_new(meth); + if (ret == NULL) { + return NULL; + } + + if (ret->meth->group_set_curve == 0) { + OPENSSL_PUT_ERROR(EC, ec_group_new_curve_GFp, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (!ret->meth->group_set_curve(ret, p, a, b, ctx)) { + EC_GROUP_free(ret); + return NULL; + } + return ret; +} + +static EC_GROUP *ec_group_new_from_data(const struct built_in_curve *curve) { + EC_GROUP *group = NULL; + EC_POINT *P = NULL; + BN_CTX *ctx = NULL; + BIGNUM *p = NULL, *a = NULL, *b = NULL, *x = NULL, *y = NULL, *order = NULL; + int ok = 0; + unsigned param_len; + const EC_METHOD *meth; + const struct curve_data *data; + const uint8_t *params; + + if ((ctx = BN_CTX_new()) == NULL) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_MALLOC_FAILURE); + goto err; + } + + data = curve->data; + param_len = data->param_len; + params = data->data; + + if (!(p = BN_bin2bn(params + 0 * param_len, param_len, NULL)) || + !(a = BN_bin2bn(params + 1 * param_len, param_len, NULL)) || + !(b = BN_bin2bn(params + 2 * param_len, param_len, NULL))) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); + goto err; + } + + if (curve->method != 0) { + meth = curve->method(); + if (((group = ec_group_new(meth)) == NULL) || + (!(group->meth->group_set_curve(group, p, a, b, ctx)))) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); + goto err; + } + } else { + if ((group = ec_group_new_curve_GFp(p, a, b, ctx)) == NULL) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); + goto err; + } + } + + if ((P = EC_POINT_new(group)) == NULL) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); + goto err; + } + + if (!(x = BN_bin2bn(params + 3 * param_len, param_len, NULL)) || + !(y = BN_bin2bn(params + 4 * param_len, param_len, NULL))) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); + goto err; + } + + if (!EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx)) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); + goto err; + } + if (!(order = BN_bin2bn(params + 5 * param_len, param_len, NULL)) || + !BN_set_word(x, (BN_ULONG)data->cofactor)) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); + goto err; + } + + group->generator = P; + P = NULL; + if (!BN_copy(&group->order, order) || + !BN_set_word(&group->cofactor, (BN_ULONG)data->cofactor)) { + OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); + goto err; + } + + ok = 1; + +err: + if (!ok) { + EC_GROUP_free(group); + group = NULL; + } + if (P) + EC_POINT_free(P); + if (ctx) + BN_CTX_free(ctx); + if (p) + BN_free(p); + if (a) + BN_free(a); + if (b) + BN_free(b); + if (order) + BN_free(order); + if (x) + BN_free(x); + if (y) + BN_free(y); + return group; +} + +EC_GROUP *EC_GROUP_new_by_curve_name(int nid) { + unsigned i; + const struct built_in_curve *curve; + EC_GROUP *ret = NULL; + + for (i = 0; OPENSSL_built_in_curves[i].nid != NID_undef; i++) { + curve = &OPENSSL_built_in_curves[i]; + if (curve->nid == nid) { + ret = ec_group_new_from_data(curve); + break; + } + } + + if (ret == NULL) { + OPENSSL_PUT_ERROR(EC, EC_GROUP_new_by_curve_name, EC_R_UNKNOWN_GROUP); + return NULL; + } + + ret->curve_name = nid; + return ret; +} + +void EC_GROUP_free(EC_GROUP *group) { + if (!group) { + return; + } + + if (group->meth->group_finish != 0) { + group->meth->group_finish(group); + } + + ec_pre_comp_free(group->pre_comp); + + if (group->generator != NULL) { + EC_POINT_free(group->generator); + } + BN_free(&group->order); + BN_free(&group->cofactor); + + OPENSSL_free(group); +} + +int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) { + if (dest->meth->group_copy == 0) { + OPENSSL_PUT_ERROR(EC, EC_GROUP_copy, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (dest->meth != src->meth) { + OPENSSL_PUT_ERROR(EC, EC_GROUP_copy, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + if (dest == src) { + return 1; + } + + ec_pre_comp_free(dest->pre_comp); + dest->pre_comp = ec_pre_comp_dup(src->pre_comp); + + if (src->generator != NULL) { + if (dest->generator == NULL) { + dest->generator = EC_POINT_new(dest); + if (dest->generator == NULL) { + return 0; + } + } + if (!EC_POINT_copy(dest->generator, src->generator)) { + return 0; + } + } else { + /* src->generator == NULL */ + if (dest->generator != NULL) { + EC_POINT_clear_free(dest->generator); + dest->generator = NULL; + } + } + + if (!BN_copy(&dest->order, &src->order) || + !BN_copy(&dest->cofactor, &src->cofactor)) { + return 0; + } + + dest->curve_name = src->curve_name; + + return dest->meth->group_copy(dest, src); +} + +EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) { + EC_GROUP *t = NULL; + int ok = 0; + + if (a == NULL) { + return NULL; + } + + t = ec_group_new(a->meth); + if (t == NULL) { + return NULL; + } + if (!EC_GROUP_copy(t, a)) { + goto err; + } + + ok = 1; + +err: + if (!ok) { + if (t) { + EC_GROUP_free(t); + } + return NULL; + } else { + return t; + } +} + +int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b) { + if (a->curve_name == NID_undef || b->curve_name == NID_undef) { + return 0; + } + return a->curve_name == b->curve_name; +} + +const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) { + return group->generator; +} + +int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) { + if (!BN_copy(order, &group->order)) { + return 0; + } + + return !BN_is_zero(order); +} + +int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, + BN_CTX *ctx) { + if (!BN_copy(cofactor, &group->cofactor)) { + return 0; + } + + return !BN_is_zero(&group->cofactor); +} + +int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *out_p, BIGNUM *out_a, + BIGNUM *out_b, BN_CTX *ctx) { + if (group->meth->group_get_curve == 0) { + OPENSSL_PUT_ERROR(EC, EC_GROUP_get_curve_GFp, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + return group->meth->group_get_curve(group, out_p, out_a, out_b, ctx); +} + +int EC_GROUP_get_curve_name(const EC_GROUP *group) { return group->curve_name; } + +int EC_GROUP_get_degree(const EC_GROUP *group) { + if (group->meth->group_get_degree == 0) { + OPENSSL_PUT_ERROR(EC, EC_GROUP_get_degree, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + return group->meth->group_get_degree(group); +} + +int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) { + if (group->meth->mul == 0) { + /* use default */ + return ec_wNAF_precompute_mult(group, ctx); + } + + if (group->meth->precompute_mult != 0) { + return group->meth->precompute_mult(group, ctx); + } + + return 1; /* nothing to do, so report success */ +} + +int EC_GROUP_have_precompute_mult(const EC_GROUP *group) { + if (group->meth->mul == 0) { + /* use default */ + return ec_wNAF_have_precompute_mult(group); + } + + if (group->meth->have_precompute_mult != 0) { + return group->meth->have_precompute_mult(group); + } + + return 0; /* cannot tell whether precomputation has been performed */ +} + +EC_POINT *EC_POINT_new(const EC_GROUP *group) { + EC_POINT *ret; + + if (group == NULL) { + OPENSSL_PUT_ERROR(EC, EC_POINT_new, ERR_R_PASSED_NULL_PARAMETER); + return NULL; + } + if (group->meth->point_init == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_new, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return NULL; + } + + ret = OPENSSL_malloc(sizeof *ret); + if (ret == NULL) { + OPENSSL_PUT_ERROR(EC, EC_POINT_new, ERR_R_MALLOC_FAILURE); + return NULL; + } + + ret->meth = group->meth; + + if (!ret->meth->point_init(ret)) { + OPENSSL_free(ret); + return NULL; + } + + return ret; +} + +void EC_POINT_free(EC_POINT *point) { + if (!point) { + return; + } + + if (point->meth->point_finish != 0) { + point->meth->point_finish(point); + } + OPENSSL_free(point); +} + +void EC_POINT_clear_free(EC_POINT *point) { + if (!point) { + return; + } + + if (point->meth->point_clear_finish != 0) { + point->meth->point_clear_finish(point); + } else if (point->meth->point_finish != 0) { + point->meth->point_finish(point); + } + OPENSSL_cleanse(point, sizeof *point); + OPENSSL_free(point); +} + +int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) { + if (dest->meth->point_copy == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_copy, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (dest->meth != src->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_copy, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + if (dest == src) { + return 1; + } + return dest->meth->point_copy(dest, src); +} + +EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) { + EC_POINT *t; + int r; + + if (a == NULL) { + return NULL; + } + + t = EC_POINT_new(group); + if (t == NULL) { + OPENSSL_PUT_ERROR(EC, EC_POINT_dup, ERR_R_MALLOC_FAILURE); + return NULL; + } + r = EC_POINT_copy(t, a); + if (!r) { + EC_POINT_free(t); + return NULL; + } else { + return t; + } +} + +int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) { + if (group->meth->point_set_to_infinity == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_set_to_infinity, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_set_to_infinity, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->point_set_to_infinity(group, point); +} + +int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) { + if (group->meth->is_at_infinity == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_is_at_infinity, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_is_at_infinity, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->is_at_infinity(group, point); +} + +int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, + BN_CTX *ctx) { + if (group->meth->is_on_curve == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_is_on_curve, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_is_on_curve, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->is_on_curve(group, point, ctx); +} + +int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, + BN_CTX *ctx) { + if (group->meth->point_cmp == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_cmp, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return -1; + } + if ((group->meth != a->meth) || (a->meth != b->meth)) { + OPENSSL_PUT_ERROR(EC, EC_POINT_cmp, EC_R_INCOMPATIBLE_OBJECTS); + return -1; + } + return group->meth->point_cmp(group, a, b, ctx); +} + +int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) { + if (group->meth->make_affine == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_make_affine, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_make_affine, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->make_affine(group, point, ctx); +} + +int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], + BN_CTX *ctx) { + size_t i; + + if (group->meth->points_make_affine == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINTs_make_affine, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + for (i = 0; i < num; i++) { + if (group->meth != points[i]->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINTs_make_affine, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + } + return group->meth->points_make_affine(group, num, points, ctx); +} + +int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, + const EC_POINT *point, BIGNUM *x, + BIGNUM *y, BN_CTX *ctx) { + if (group->meth->point_get_affine_coordinates == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_get_affine_coordinates_GFp, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_get_affine_coordinates_GFp, + EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); +} + +int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, + const BIGNUM *x, const BIGNUM *y, + BN_CTX *ctx) { + if (group->meth->point_set_affine_coordinates == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_set_affine_coordinates_GFp, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_set_affine_coordinates_GFp, + EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); +} + +int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, + const EC_POINT *b, BN_CTX *ctx) { + if (group->meth->add == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_add, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if ((group->meth != r->meth) || (r->meth != a->meth) || + (a->meth != b->meth)) { + OPENSSL_PUT_ERROR(EC, EC_POINT_add, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->add(group, r, a, b, ctx); +} + + +int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, + BN_CTX *ctx) { + if (group->meth->dbl == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_dbl, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if ((group->meth != r->meth) || (r->meth != a->meth)) { + OPENSSL_PUT_ERROR(EC, EC_POINT_dbl, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->dbl(group, r, a, ctx); +} + + +int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) { + if (group->meth->invert == 0) { + OPENSSL_PUT_ERROR(EC, EC_POINT_invert, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != a->meth) { + OPENSSL_PUT_ERROR(EC, EC_POINT_invert, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->invert(group, a, ctx); +} + +int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, + const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) { + /* just a convenient interface to EC_POINTs_mul() */ + + const EC_POINT *points[1]; + const BIGNUM *scalars[1]; + + points[0] = point; + scalars[0] = p_scalar; + + return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), + points, scalars, ctx); +} + +int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, + size_t num, const EC_POINT *points[], const BIGNUM *scalars[], + BN_CTX *ctx) { + if (group->meth->mul == 0) { + /* use default. Warning, not constant-time. */ + return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); + } + + return group->meth->mul(group, r, scalar, num, points, scalars, ctx); +} + +int ec_point_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, + const BIGNUM *x, const BIGNUM *y, + const BIGNUM *z, BN_CTX *ctx) { + if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { + OPENSSL_PUT_ERROR(EC, ec_point_set_Jprojective_coordinates_GFp, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + OPENSSL_PUT_ERROR(EC, ec_point_set_Jprojective_coordinates_GFp, + EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, + z, ctx); +} |