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Expose generator in pedersen/rangeproof API

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This commit is contained in:
Pieter Wuille
2016-07-06 13:46:23 +02:00
committed by Andrew Poelstra
parent 54fa2639e1
commit 9b00b61d9d
8 changed files with 119 additions and 90 deletions
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32
include/secp256k1_rangeproof.h
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@@ -26,9 +26,14 @@ typedef struct {
unsigned char data[33];
} secp256k1_pedersen_commitment;
/**
* Static constant generator 'h' maintained for historical reasons.
*/
extern const secp256k1_generator *secp256k1_generator_h;
/** Parse a 33-byte commitment into a commitment object.
*
* Returns: 1 always
* Returns: 1 if input contains a valid commitment.
* Args: ctx: a secp256k1 context object.
* Out: commit: pointer to the output commitment object
* In: input: pointer to a 33-byte serialized commitment key
@@ -70,8 +75,9 @@ SECP256K1_WARN_UNUSED_RESULT int secp256k1_pedersen_commit(
const secp256k1_context* ctx,
secp256k1_pedersen_commitment *commit,
const unsigned char *blind,
uint64_t value
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
uint64_t value,
const secp256k1_generator *gen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(5);
/** Computes the sum of multiple positive and negative blinding factors.
* Returns 1: sum successfully computed.
@@ -113,8 +119,9 @@ SECP256K1_WARN_UNUSED_RESULT int secp256k1_pedersen_verify_tally(
size_t pcnt,
const secp256k1_pedersen_commitment * const* ncommits,
size_t ncnt,
int64_t excess
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(4);
int64_t excess,
const secp256k1_generator *gen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(4) SECP256K1_ARG_NONNULL(7);
/** Initialize a context for usage with Pedersen commitments. */
void secp256k1_rangeproof_context_initialize(secp256k1_context* ctx);
@@ -135,8 +142,9 @@ SECP256K1_WARN_UNUSED_RESULT int secp256k1_rangeproof_verify(
uint64_t *max_value,
const secp256k1_pedersen_commitment *commit,
const unsigned char *proof,
size_t plen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4) SECP256K1_ARG_NONNULL(5);
size_t plen,
const secp256k1_generator* gen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4) SECP256K1_ARG_NONNULL(5) SECP256K1_ARG_NONNULL(7);
/** Verify a range proof proof and rewind the proof to recover information sent by its author.
* Returns 1: Value is within the range [0..2^64), the specifically proven range is in the min/max value outputs, and the value and blinding were recovered.
@@ -164,8 +172,9 @@ SECP256K1_WARN_UNUSED_RESULT int secp256k1_rangeproof_rewind(
uint64_t *max_value,
const secp256k1_pedersen_commitment *commit,
const unsigned char *proof,
size_t plen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(6) SECP256K1_ARG_NONNULL(7) SECP256K1_ARG_NONNULL(8) SECP256K1_ARG_NONNULL(9) SECP256K1_ARG_NONNULL(10);
size_t plen,
const secp256k1_generator *gen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(6) SECP256K1_ARG_NONNULL(7) SECP256K1_ARG_NONNULL(8) SECP256K1_ARG_NONNULL(9) SECP256K1_ARG_NONNULL(10) SECP256K1_ARG_NONNULL(12);
/** Author a proof that a committed value is within a range.
* Returns 1: Proof successfully created.
@@ -201,8 +210,9 @@ SECP256K1_WARN_UNUSED_RESULT int secp256k1_rangeproof_sign(
int min_bits,
uint64_t value,
const unsigned char *message,
size_t msg_len
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(5) SECP256K1_ARG_NONNULL(6) SECP256K1_ARG_NONNULL(7);
size_t msg_len,
const secp256k1_generator *gen
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(5) SECP256K1_ARG_NONNULL(6) SECP256K1_ARG_NONNULL(7) SECP256K1_ARG_NONNULL(13);
/** Extract some basic information from a range-proof.
* Returns 1: Information successfully extracted.