/usr/include/signal/curve.h is in libsignal-protocol-c-dev 2.3.1+git20171007-3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | #ifndef CURVE_H
#define CURVE_H
#include <stdint.h>
#include <stddef.h>
#include "signal_protocol_types.h"
#ifdef __cplusplus
extern "C" {
#endif
#define CURVE_SIGNATURE_LEN 64
#define VRF_SIGNATURE_LEN 96
int curve_internal_fast_tests();
int curve_decode_point(ec_public_key **public_key, const uint8_t *key_data, size_t key_len, signal_context *global_context);
int ec_public_key_compare(const ec_public_key *key1, const ec_public_key *key2);
int ec_public_key_memcmp(const ec_public_key *key1, const ec_public_key *key2);
/**
* Serialize the public key into a buffer that can be stored.
* The format of this data is compatible with the input format of
* curve_decode_point().
*
* @param buffer Pointer to a buffer that will be allocated by this function
* and filled with the contents of the key. The caller is responsible for
* freeing this buffer with signal_buffer_free().
* @param key Key to serialize
* @return 0 on success, negative on failure
*/
int ec_public_key_serialize(signal_buffer **buffer, const ec_public_key *key);
void ec_public_key_destroy(signal_type_base *type);
int curve_decode_private_point(ec_private_key **private_key, const uint8_t *key_data, size_t key_len, signal_context *global_context);
int ec_private_key_compare(const ec_private_key *key1, const ec_private_key *key2);
/**
* Serialize the private key into a buffer that can be stored.
* The format of this data is compatible with the input format of
* curve_decode_private_point().
*
* @param buffer Pointer to a buffer that will be allocated by this function
* and filled with the contents of the key. The caller is responsible for
* freeing this buffer with signal_buffer_free().
* @param key Key to serialize
* @return 0 on success, negative on failure
*/
int ec_private_key_serialize(signal_buffer **buffer, const ec_private_key *key);
void ec_private_key_destroy(signal_type_base *type);
int ec_key_pair_create(ec_key_pair **key_pair, ec_public_key *public_key, ec_private_key *private_key);
ec_public_key *ec_key_pair_get_public(const ec_key_pair *key_pair);
ec_private_key *ec_key_pair_get_private(const ec_key_pair *key_pair);
void ec_key_pair_destroy(signal_type_base *type);
int curve_generate_private_key(signal_context *context, ec_private_key **private_key);
int curve_generate_public_key(ec_public_key **public_key, const ec_private_key *private_key);
/**
* Generates a Curve25519 keypair.
*
* @param key_pair Set to a randomly generated Curve25519 keypair on success.
* @return 0 on success, negative on failure
*/
int curve_generate_key_pair(signal_context *context, ec_key_pair **key_pair);
/**
* Allocate a new ec_public_key list
*
* @return pointer to the allocated list, or 0 on failure
*/
ec_public_key_list *ec_public_key_list_alloc(void);
/**
* Copy an ec_public_key list
*
* @return pointer to the copy of the list, or 0 on failure
*/
ec_public_key_list *ec_public_key_list_copy(const ec_public_key_list *list);
/**
* Push a new value onto the end of the list
*
* @param list the list
* @param value the value to push
* @return 0 on success, negative on failure
*/
int ec_public_key_list_push_back(ec_public_key_list *list, ec_public_key *value);
/**
* Gets the size of the list.
*
* @param list the list
* @return the size of the list
*/
unsigned int ec_public_key_list_size(const ec_public_key_list *list);
/**
* Gets the value of the element at a particular index in the list
*
* @param list the list
* @param index the index within the list
* @return the value
*/
ec_public_key *ec_public_key_list_at(const ec_public_key_list *list, unsigned int index);
/**
* Sorts the list based on a comparison of the key data.
*
* @param list the list
*/
void ec_public_key_list_sort(ec_public_key_list *list);
/**
* Free the ec_public_key list
* @param list the list to free
*/
void ec_public_key_list_free(ec_public_key_list *list);
/**
* Calculates an ECDH agreement.
*
* @param shared_key_data Set to a 32-byte shared secret on success.
* @param public_key The Curve25519 (typically remote party's) public key.
* @param private_key The Curve25519 (typically yours) private key.
* @return 0 on success, negative on failure
*/
int curve_calculate_agreement(uint8_t **shared_key_data, const ec_public_key *public_key, const ec_private_key *private_key);
/**
* Verify a Curve25519 signature.
*
* @param signing_key The Curve25519 public key the signature belongs to.
* @param message_data The message that was signed.
* @param message_len The length of the message that was signed.
* @param signature_data The signature to verify.
* @param signature_len The length of the signature to verify.
* @return 1 if valid, 0 if invalid, negative on failure
*/
int curve_verify_signature(const ec_public_key *signing_key,
const uint8_t *message_data, size_t message_len,
const uint8_t *signature_data, size_t signature_len);
/**
* Calculates a Curve25519 signature.
*
* @param signature Set to a 64-byte signature on success.
* @param signing_key The private Curve25519 key to create the signature with.
* @param message_data The message to sign.
* @param message_len The length of the message to sign.
* @return 0 on success, negative on failure
*/
int curve_calculate_signature(signal_context *context,
signal_buffer **signature,
const ec_private_key *signing_key,
const uint8_t *message_data, size_t message_len);
/**
* Verify a Unique Curve25519 signature.
*
* @param vrf_output Set to VRF output on success
* @param signing_key The Curve25519 public key the unique signature belongs to.
* @param message_data The message that was signed.
* @param message_len The length of the message that was signed.
* @param signature_data The signature to verify.
* @param signature_len The length of the signature to verify.
* @return 1 if valid, 0 if invalid, negative on failure
*/
int curve_verify_vrf_signature(signal_context *context,
signal_buffer **vrf_output,
const ec_public_key *signing_key,
const uint8_t *message_data, size_t message_len,
const uint8_t *signature_data, size_t signature_len);
/**
* Calculates a Unique Curve25519 signature.
*
* @param signature Set to a 96-byte signature on success.
* @param signing_key The private Curve25519 key to create the signature with.
* @param message_data The message to sign.
* @param message_len The length of the message to sign.
* @return 0 on success, negative on failure
*/
int curve_calculate_vrf_signature(signal_context *context,
signal_buffer **signature,
const ec_private_key *signing_key,
const uint8_t *message_data, size_t message_len);
#ifdef __cplusplus
}
#endif
#endif /* CURVE_H */
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