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2 * Copyright (c) 2013, Kenneth MacKay
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6 * modification, are permitted provided that the following conditions are
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29 #define ECC_MAX_DIGITS 4 /* 256 */
31 #define ECC_DIGITS_TO_BYTES_SHIFT 3
34 * ecc_is_key_valid() - Validate a given ECDH private key
36 * @curve_id: id representing the curve to use
37 * @ndigits: curve's number of digits
38 * @private_key: private key to be used for the given curve
39 * @private_key_len: private key length
41 * Returns 0 if the key is acceptable, a negative value otherwise
43 int ecc_is_key_valid(unsigned int curve_id
, unsigned int ndigits
,
44 const u64
*private_key
, unsigned int private_key_len
);
47 * ecc_make_pub_key() - Compute an ECC public key
49 * @curve_id: id representing the curve to use
50 * @ndigits: curve's number of digits
51 * @private_key: pregenerated private key for the given curve
52 * @public_key: buffer for storing the generated public key
54 * Returns 0 if the public key was generated successfully, a negative value
55 * if an error occurred.
57 int ecc_make_pub_key(const unsigned int curve_id
, unsigned int ndigits
,
58 const u64
*private_key
, u64
*public_key
);
61 * crypto_ecdh_shared_secret() - Compute a shared secret
63 * @curve_id: id representing the curve to use
64 * @ndigits: curve's number of digits
65 * @private_key: private key of part A
66 * @public_key: public key of counterpart B
67 * @secret: buffer for storing the calculated shared secret
69 * Note: It is recommended that you hash the result of crypto_ecdh_shared_secret
70 * before using it for symmetric encryption or HMAC.
72 * Returns 0 if the shared secret was generated successfully, a negative value
73 * if an error occurred.
75 int crypto_ecdh_shared_secret(unsigned int curve_id
, unsigned int ndigits
,
76 const u64
*private_key
, const u64
*public_key
,