55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
/*
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* Copyright (c) 2013, Kenneth MacKay. All rights reserved.
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* Copyright (c) 2017, NVIDIA Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#ifndef _CRYPTO_ECC_ECDH_H
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#define _CRYPTO_ECC_ECDH_H
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#include "ecc.h"
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/**
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* ecdh_make_pub_key() - Compute an ECC public key
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*
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* @curve_id: id representing the curve to use
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* @private_key: pregenerated private key for the given curve
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* @private_key_len: length of private_key
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* @public_key: buffer for storing the public key generated
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* @public_key_len: length of the public_key buffer
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*
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* Returns 0 if the public key was generated successfully, a negative value
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* if an error occurred.
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*/
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int ecdh_make_pub_key(const unsigned int curve_id, unsigned int ndigits,
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const u8 *private_key, unsigned int private_key_len,
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u8 *public_key, unsigned int public_key_len);
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/**
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* crypto_ecdh_shared_secret() - Compute a shared secret
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*
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* @curve_id: id representing the curve to use
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* @private_key: private key of part A
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* @private_key_len: length of private_key
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* @public_key: public key of counterpart B
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* @public_key_len: length of public_key
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* @secret: buffer for storing the calculated shared secret
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* @secret_len: length of the secret buffer
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*
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* Note: It is recommended that you hash the result of crypto_ecdh_shared_secret
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* before using it for symmetric encryption or HMAC.
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*
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* Returns 0 if the shared secret was generated successfully, a negative value
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* if an error occurred.
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*/
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int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits,
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const u8 *private_key, unsigned int private_key_len,
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const u8 *public_key, unsigned int public_key_len,
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u8 *secret, unsigned int secret_len);
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#endif /* _CRYPTO_ECC_ECDH_H */
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