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pedersen_proof.h
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pedersen_proof.h
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#ifndef _PEDERSEN_PROOF_H
#define _PEDERSEN_PROOF_H
#include <stdbool.h>
#include <openssl/ec.h>
/**
* Holds the statement to be proven
*/
typedef struct pedersen_statement* PedersenStatement;
typedef const struct pedersen_statement* const_PedersenStatement;
/**
* Holds the prover's witness
*/
typedef struct pedersen_evidence* PedersenEvidence;
typedef const struct pedersen_evidence* const_PedersenEvidence;
/**
* Proves the statement:
* PoK{ x, r: commit_x = (g^x * h^r) AND g_to_the_x = g^x }
* using a non-interactive zero-knowledge proof of knowledge.
* See Camenisch and Stadler's 1997 paper for details on how
* to construct such a proof.
*/
PedersenStatement PedersenStatement_New(const EC_GROUP* group,
const EC_POINT* g,
const EC_POINT* h,
const EC_POINT* commit_x,
const EC_POINT* g_to_the_x);
void PedersenStatement_Free(PedersenStatement st);
PedersenEvidence PedersenEvidence_New(PedersenStatement st,
const BIGNUM *x, const BIGNUM *r);
void PedersenEvidence_Free(PedersenEvidence ev);
bool PedersenEvidence_Verify(const_PedersenEvidence ev, const_PedersenStatement st);
bool PedersenEvidence_Serialize(const_PedersenEvidence ev, FILE* fp);
PedersenEvidence PedersenEvidence_Unserialize(FILE* fp);
#endif