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Squashed 'src/secp256k1/' changes from ee99f12..763484a1e5
763484a1e5 f fix undefined behavior when shifting an int 31 places 5af66e7f79 f expose nonce_function_bipschnorr 594e3abb69 f hash noncedata into nonce in nonce_function_bipschnorr 318d55155c f make helper functions static d65adc82f8 Add schnorrsig module which implements BIP-schnorr [0] compatible signing, verification and batch verification. f4153a29ab add chacha20 function REVERT: ee99f12 Merge bitcoin#599: Switch x86_64 asm to use "i" instead of "n" for immediate values. REVERT: d58bc93 Switch x86_64 asm to use "i" instead of "n" for immediate values. REVERT: 05362ee Merge bitcoin#597: Add $(COMMON_LIB) to exhaustive tests to fix ARM asm build REVERT: 8348386 Add $(COMMON_LIB) to exhaustive tests to fix ARM asm build REVERT: aa15154 Merge bitcoin#568: Fix integer overflow in ecmult_multi_var when n is large REVERT: 2277af5 Fix integer overflow in ecmult_multi_var when n is large REVERT: 85d0e1b Merge bitcoin#591: Make bench_internal obey secp256k1_fe_sqrt's contract wrt aliasing. REVERT: 1419637 Merge bitcoin#580: Add trivial ecmult_multi algorithm which does not require a scratch space REVERT: a697d82 Add trivial ecmult_multi to the benchmark tool REVERT: bade617 Add trivial ecmult_multi algorithm. It is selected when no scratch space is given and just multiplies and adds the points. REVERT: 5545e13 Merge bitcoin#584: configure: Use CFLAGS_FOR_BUILD when checking native compiler REVERT: 20c5869 Merge bitcoin#516: improvements to random seed in src/tests.c REVERT: b76e45d Make bench_internal obey secp256k1_fe_sqrt's contract wrt aliasing. REVERT: 870a977 Merge bitcoin#562: Make use of TAG_PUBKEY constants in secp256k1_eckey_pubkey_parse REVERT: be40c4d Fixup for C90 mixed declarations. REVERT: c71dd2c Merge bitcoin#509: Fix algorithm selection in bench_ecmult REVERT: 6492bf8 Merge bitcoin#518: Summarize build options after running configure REVERT: 0e9ada1 Merge bitcoin#567: Correct order of libs returned on pkg-config --libs --static libsecp2… REVERT: e96901a Merge bitcoin#587: Make randomization of a non-signing context a noop REVERT: 58df8d0 Merge bitcoin#511: Portability fix for the configure scripts generated REVERT: 2ebdad7 Merge bitcoin#552: Make constants static: REVERT: 1c131af Merge bitcoin#551: secp256k1_fe_sqrt: Verify that the arguments don't alias. REVERT: ba698f8 Merge bitcoin#539: Assorted minor corrections REVERT: 949e85b Merge bitcoin#550: Optimize secp256k1_fe_normalize_weak calls. REVERT: a34bcaa Actually pass CFLAGS_FOR_BUILD and LDFLAGS_FOR_BUILD to linker REVERT: 2d5f4ce configure: Use CFLAGS_FOR_BUILD when checking native compiler REVERT: b408c6a Merge bitcoin#579: Use __GNUC_PREREQ for detecting __builtin_expect REVERT: 6198375 Make randomization of a non-signing context a noop REVERT: c663397 Use __GNUC_PREREQ for detecting __builtin_expect REVERT: e34ceb3 Merge bitcoin#557: Eliminate scratch memory used when generating contexts REVERT: b3bf5f9 ecmult_impl: expand comment to explain how effective affine interacts with everything REVERT: efa783f Store z-ratios in the 'x' coord they'll recover REVERT: ffd3b34 add `secp256k1_ge_set_all_gej_var` test which deals with many infinite points REVERT: 84740ac ecmult_impl: save one fe_inv_var REVERT: 4704527 ecmult_impl: eliminate scratch memory used when generating context REVERT: 7f7a2ed ecmult_gen_impl: eliminate scratch memory used when generating context REVERT: 314a61d Merge bitcoin#553: add static context object which has no capabilities REVERT: 89a20a8 Correct order of libs returned on pkg-config --libs --static libsecp256k1 call. REVERT: d3cb1f9 Make use of TAG_PUBKEY constants in secp256k1_eckey_pubkey_parse REVERT: 40fde61 prevent attempts to modify `secp256k1_context_no_precomp` REVERT: ed7c084 add static context object which has no capabilities REVERT: 496c5b4 Make constants static: static const secp256k1_ge secp256k1_ge_const_g; static const int CURVE_B; REVERT: bf8b86c secp256k1_fe_sqrt: Verify that the arguments don't alias. REVERT: 9bd89c8 Optimize secp256k1_fe_normalize_weak calls. Move secp256k1_fe_normalize_weak calls out of ECMULT_TABLE_GET_GE and ECMULT_TABLE_GET_GE_STORAGE and into secp256k1_ge_globalz_set_table_gej instead. REVERT: 52ab96f clean dependendies in field_*_impl.h REVERT: deff5ed Correct math typos in field_*.h REVERT: 4efb3f8 Add check that restrict pointers don't alias with all parameters. REVERT: 3965027 Summarize build options in configure script REVERT: 0f05173 Fix algorithm selection in bench_ecmult REVERT: 8b3841c fix bug in fread() failure check REVERT: cddef0c tests: add warning message when /dev/urandom fails REVERT: 270f6c8 Portability fix for the configure scripts generated git-subtree-dir: src/secp256k1 git-subtree-split: 763484a1e5bed2b8b990e71c2f66129ae1038d59
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| #ifndef SECP256K1_SCHNORRSIG_H | ||
| #define SECP256K1_SCHNORRSIG_H | ||
|
|
||
| /** This module implements a variant of Schnorr signatures compliant with | ||
| * BIP-schnorr | ||
| * (https://github.com/sipa/bips/blob/bip-schnorr/bip-schnorr.mediawiki). | ||
| */ | ||
|
|
||
| /** Opaque data structure that holds a parsed Schnorr signature. | ||
| * | ||
| * The exact representation of data inside is implementation defined and not | ||
| * guaranteed to be portable between different platforms or versions. It is | ||
| * however guaranteed to be 64 bytes in size, and can be safely copied/moved. | ||
| * If you need to convert to a format suitable for storage, transmission, or | ||
| * comparison, use the `secp256k1_schnorrsig_serialize` and | ||
| * `secp256k1_schnorrsig_parse` functions. | ||
| */ | ||
| typedef struct { | ||
| unsigned char data[64]; | ||
| } secp256k1_schnorrsig; | ||
|
|
||
| /** Serialize a Schnorr signature. | ||
| * | ||
| * Returns: 1 | ||
| * Args: ctx: a secp256k1 context object | ||
| * Out: out64: pointer to a 64-byte array to store the serialized signature | ||
| * In: sig: pointer to the signature | ||
| * | ||
| * See secp256k1_schnorrsig_parse for details about the encoding. | ||
| */ | ||
| SECP256K1_API int secp256k1_schnorrsig_serialize( | ||
| const secp256k1_context* ctx, | ||
| unsigned char *out64, | ||
| const secp256k1_schnorrsig* sig | ||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3); | ||
|
|
||
| /** Parse a Schnorr signature. | ||
| * | ||
| * Returns: 1 when the signature could be parsed, 0 otherwise. | ||
| * Args: ctx: a secp256k1 context object | ||
| * Out: sig: pointer to a signature object | ||
| * In: in64: pointer to the 64-byte signature to be parsed | ||
| * | ||
| * The signature is serialized in the form R||s, where R is a 32-byte public | ||
| * key (x-coordinate only; the y-coordinate is considered to be the unique | ||
| * y-coordinate satisfying the curve equation that is a quadratic residue) | ||
| * and s is a 32-byte big-endian scalar. | ||
| * | ||
| * After the call, sig will always be initialized. If parsing failed or the | ||
| * encoded numbers are out of range, signature validation with it is | ||
| * guaranteed to fail for every message and public key. | ||
| */ | ||
| SECP256K1_API int secp256k1_schnorrsig_parse( | ||
| const secp256k1_context* ctx, | ||
| secp256k1_schnorrsig* sig, | ||
| const unsigned char *in64 | ||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3); | ||
|
|
||
| /** Create a Schnorr signature. | ||
| * | ||
| * Returns 1 on success, 0 on failure. | ||
| * Args: ctx: pointer to a context object, initialized for signing (cannot be NULL) | ||
| * Out: sig: pointer to the returned signature (cannot be NULL) | ||
| * nonce_is_negated: a pointer to an integer indicates if signing algorithm negated the | ||
| * nonce (can be NULL) | ||
| * In: msg32: the 32-byte message hash being signed (cannot be NULL) | ||
| * seckey: pointer to a 32-byte secret key (cannot be NULL) | ||
| * noncefp: pointer to a nonce generation function. If NULL, secp256k1_nonce_function_bipschnorr is used | ||
| * ndata: pointer to arbitrary data used by the nonce generation function (can be NULL) | ||
| */ | ||
| SECP256K1_API int secp256k1_schnorrsig_sign( | ||
| const secp256k1_context* ctx, | ||
| secp256k1_schnorrsig *sig, | ||
| int *nonce_is_negated, | ||
| const unsigned char *msg32, | ||
| const unsigned char *seckey, | ||
| secp256k1_nonce_function noncefp, | ||
| void *ndata | ||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(4) SECP256K1_ARG_NONNULL(5); | ||
|
|
||
| /** Verify a Schnorr signature. | ||
| * | ||
| * Returns: 1: correct signature | ||
| * 0: incorrect or unparseable signature | ||
| * Args: ctx: a secp256k1 context object, initialized for verification. | ||
| * In: sig: the signature being verified (cannot be NULL) | ||
| * msg32: the 32-byte message hash being verified (cannot be NULL) | ||
| * pubkey: pointer to a public key to verify with (cannot be NULL) | ||
| */ | ||
| SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_schnorrsig_verify( | ||
| const secp256k1_context* ctx, | ||
| const secp256k1_schnorrsig *sig, | ||
| const unsigned char *msg32, | ||
| const secp256k1_pubkey *pubkey | ||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4); | ||
|
|
||
| /** Verifies a set of Schnorr signatures. | ||
| * | ||
| * Returns 1 if all succeeded, 0 otherwise. In particular, returns 1 if n_sigs is 0. | ||
| * | ||
| * Args: ctx: a secp256k1 context object, initialized for verification. | ||
| * scratch: scratch space used for the multiexponentiation | ||
| * In: sig: array of signatures, or NULL if there are no signatures | ||
| * msg32: array of messages, or NULL if there are no signatures | ||
| * pk: array of public keys, or NULL if there are no signatures | ||
| * n_sigs: number of signatures in above arrays. Must be smaller than | ||
| * 2^31 and smaller than half the maximum size_t value. Must be 0 | ||
| * if above arrays are NULL. | ||
| */ | ||
| SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_schnorrsig_verify_batch( | ||
| const secp256k1_context* ctx, | ||
| secp256k1_scratch_space *scratch, | ||
| const secp256k1_schnorrsig *const *sig, | ||
| const unsigned char *const *msg32, | ||
| const secp256k1_pubkey *const *pk, | ||
| size_t n_sigs | ||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2); | ||
| #endif |
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