Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* ==================================================================== |
| 2 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 3 | * |
| 4 | * The Elliptic Curve Public-Key Crypto Library (ECC Code) included |
| 5 | * herein is developed by SUN MICROSYSTEMS, INC., and is contributed |
| 6 | * to the OpenSSL project. |
| 7 | * |
| 8 | * The ECC Code is licensed pursuant to the OpenSSL open source |
| 9 | * license provided below. |
| 10 | * |
| 11 | * The ECDH software is originally written by Douglas Stebila of |
| 12 | * Sun Microsystems Laboratories. |
| 13 | * |
| 14 | */ |
| 15 | /* ==================================================================== |
| 16 | * Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved. |
| 17 | * |
| 18 | * Redistribution and use in source and binary forms, with or without |
| 19 | * modification, are permitted provided that the following conditions |
| 20 | * are met: |
| 21 | * |
| 22 | * 1. Redistributions of source code must retain the above copyright |
| 23 | * notice, this list of conditions and the following disclaimer. |
| 24 | * |
| 25 | * 2. Redistributions in binary form must reproduce the above copyright |
| 26 | * notice, this list of conditions and the following disclaimer in |
| 27 | * the documentation and/or other materials provided with the |
| 28 | * distribution. |
| 29 | * |
| 30 | * 3. All advertising materials mentioning features or use of this |
| 31 | * software must display the following acknowledgment: |
| 32 | * "This product includes software developed by the OpenSSL Project |
| 33 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 34 | * |
| 35 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 36 | * endorse or promote products derived from this software without |
| 37 | * prior written permission. For written permission, please contact |
| 38 | * licensing@OpenSSL.org. |
| 39 | * |
| 40 | * 5. Products derived from this software may not be called "OpenSSL" |
| 41 | * nor may "OpenSSL" appear in their names without prior written |
| 42 | * permission of the OpenSSL Project. |
| 43 | * |
| 44 | * 6. Redistributions of any form whatsoever must retain the following |
| 45 | * acknowledgment: |
| 46 | * "This product includes software developed by the OpenSSL Project |
| 47 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 48 | * |
| 49 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 50 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 52 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 53 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 54 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 55 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 56 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 57 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 58 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 59 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 60 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 61 | * ==================================================================== |
| 62 | * |
| 63 | * This product includes cryptographic software written by Eric Young |
| 64 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 65 | * Hudson (tjh@cryptsoft.com). */ |
| 66 | |
| 67 | #ifndef OPENSSL_HEADER_ECDH_H |
| 68 | #define OPENSSL_HEADER_ECDH_H |
| 69 | |
| 70 | #include <openssl/base.h> |
| 71 | |
| 72 | #include <openssl/ec_key.h> |
| 73 | |
| 74 | #if defined(__cplusplus) |
| 75 | extern "C" { |
| 76 | #endif |
| 77 | |
| 78 | |
| 79 | /* Elliptic curve Diffie-Hellman. */ |
| 80 | |
| 81 | |
| 82 | /* ECDH_compute_key calculates the shared key between |pub_key| and |priv_key|. |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 83 | * If |kdf| is not NULL, then it is called with the bytes of the shared key and |
| 84 | * the parameter |out|. When |kdf| returns, the value of |*outlen| becomes the |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 85 | * return value. Otherwise, as many bytes of the shared key as will fit are |
| 86 | * copied directly to, at most, |outlen| bytes at |out|. It returns the number |
| 87 | * of bytes written to |out|, or -1 on error. */ |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame^] | 88 | OPENSSL_EXPORT int ECDH_compute_key( |
| 89 | void *out, size_t outlen, const EC_POINT *pub_key, const EC_KEY *priv_key, |
| 90 | void *(*kdf)(const void *in, size_t inlen, void *out, size_t *outlen)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 91 | |
| 92 | |
| 93 | #if defined(__cplusplus) |
| 94 | } /* extern C */ |
| 95 | #endif |
| 96 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 97 | #define ECDH_R_KDF_FAILED 100 |
| 98 | #define ECDH_R_NO_PRIVATE_VALUE 101 |
| 99 | #define ECDH_R_POINT_ARITHMETIC_FAILURE 102 |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 100 | |
| 101 | #endif /* OPENSSL_HEADER_ECDH_H */ |