int secp256k1_ec_privkey_negate(const secp256k1_context* ctx, unsigned char *seckey) { secp256k1_scalar sec; VERIFY_CHECK(ctx != NULL); ARG_CHECK(seckey != NULL); secp256k1_scalar_set_b32(&sec, seckey, NULL); secp256k1_scalar_negate(&sec, &sec); secp256k1_scalar_get_b32(seckey, &sec); return 1; }
int secp256k1_ecdsa_signature_parse_compact(const secp256k1_context* ctx, secp256k1_ecdsa_signature* sig, const unsigned char *input64) { secp256k1_scalar r, s; int ret = 1; int overflow = 0; (void)ctx; ARG_CHECK(sig != NULL); ARG_CHECK(input64 != NULL); secp256k1_scalar_set_b32(&r, &input64[0], &overflow); ret &= !overflow; secp256k1_scalar_set_b32(&s, &input64[32], &overflow); ret &= !overflow; if (ret) { secp256k1_ecdsa_signature_save(sig, &r, &s); } else { memset(sig, 0, sizeof(*sig)); } return ret; }
int secp256k1_ec_privkey_tweak_mul(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak) { secp256k1_scalar factor; secp256k1_scalar sec; int ret = 0; int overflow = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(seckey != NULL); ARG_CHECK(tweak != NULL); secp256k1_scalar_set_b32(&factor, tweak, &overflow); secp256k1_scalar_set_b32(&sec, seckey, NULL); ret = !overflow && secp256k1_eckey_privkey_tweak_mul(&sec, &factor); memset(seckey, 0, 32); if (ret) { secp256k1_scalar_get_b32(seckey, &sec); } secp256k1_scalar_clear(&sec); secp256k1_scalar_clear(&factor); return ret; }
int ffiPushStringOfLength(int srcIndex, int length) { char *ptr; ARG_CHECK(); /* fail before allocating */ ptr = (char*) malloc(length+1); if(!ptr) return primitiveFail(); memcpy(ptr, (void*)srcIndex, length); ptr[length] = 0; ffiTempStrings[ffiTempStringCount++] = ptr; ARG_PUSH((int)ptr); return 1; }
int secp256k1_ec_seckey_verify(const secp256k1_context* ctx, const unsigned char *seckey) { secp256k1_scalar sec; int ret; int overflow; VERIFY_CHECK(ctx != NULL); ARG_CHECK(seckey != NULL); secp256k1_scalar_set_b32(&sec, seckey, &overflow); ret = !overflow && !secp256k1_scalar_is_zero(&sec); secp256k1_scalar_clear(&sec); return ret; }
int secp256k1_ec_pubkey_serialize(const secp256k1_context* ctx, unsigned char *output, size_t *outputlen, const secp256k1_pubkey* pubkey, unsigned int flags) { secp256k1_ge Q; size_t len; int ret = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(outputlen != NULL); ARG_CHECK(*outputlen >= ((flags & SECP256K1_FLAGS_BIT_COMPRESSION) ? 33 : 65)); len = *outputlen; *outputlen = 0; ARG_CHECK(output != NULL); memset(output, 0, len); ARG_CHECK(pubkey != NULL); ARG_CHECK((flags & SECP256K1_FLAGS_TYPE_MASK) == SECP256K1_FLAGS_TYPE_COMPRESSION); if (secp256k1_pubkey_load(ctx, &Q, pubkey)) { ret = secp256k1_eckey_pubkey_serialize(&Q, output, &len, flags & SECP256K1_FLAGS_BIT_COMPRESSION); if (ret) { *outputlen = len; } } return ret; }
int secp256k1_ec_pubkey_create(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const unsigned char *seckey) { secp256k1_gej pj; secp256k1_ge p; secp256k1_scalar sec; int overflow; int ret = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(pubkey != NULL); memset(pubkey, 0, sizeof(*pubkey)); ARG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx)); ARG_CHECK(seckey != NULL); secp256k1_scalar_set_b32(&sec, seckey, &overflow); ret = (!overflow) & (!secp256k1_scalar_is_zero(&sec)); if (ret) { secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &pj, &sec); secp256k1_ge_set_gej(&p, &pj); secp256k1_pubkey_save(pubkey, &p); } secp256k1_scalar_clear(&sec); return ret; }
int secp256k1_ec_pubkey_tweak_mul(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const unsigned char *tweak) { secp256k1_ge p; secp256k1_scalar factor; int ret = 0; int overflow = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx)); ARG_CHECK(pubkey != NULL); ARG_CHECK(tweak != NULL); secp256k1_scalar_set_b32(&factor, tweak, &overflow); if (!overflow && secp256k1_pubkey_load(ctx, &p, pubkey)) { ret = secp256k1_eckey_pubkey_tweak_mul(&ctx->ecmult_ctx, &p, &factor); if (ret) { secp256k1_pubkey_save(pubkey, &p); } else { memset(pubkey, 0, sizeof(*pubkey)); } } return ret; }
int secp256k1_ec_privkey_tweak_add(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak) { secp256k1_scalar term; secp256k1_scalar sec; int ret = 0; int overflow = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(seckey != NULL); ARG_CHECK(tweak != NULL); (void)ctx; secp256k1_scalar_set_b32(&term, tweak, &overflow); secp256k1_scalar_set_b32(&sec, seckey, NULL); ret = !overflow && secp256k1_eckey_privkey_tweak_add(&sec, &term); if (ret) { secp256k1_scalar_get_b32(seckey, &sec); } secp256k1_scalar_clear(&sec); secp256k1_scalar_clear(&term); return ret; }
/********************************************************************/ /** * Opens pictDB file and calls do_list command. ********************************************************************** */ int do_list_cmd(int args, char* argv[]) { ARG_CHECK(args, 2); struct pictdb_file db_file; int ret = do_open(argv[1], "rb", &db_file); if (ret == 0) { do_list(&db_file); } do_close(&db_file); return ret; }
int secp256k1_ec_pubkey_combine(const secp256k1_context* ctx, secp256k1_pubkey *pubnonce, const secp256k1_pubkey * const *pubnonces, size_t n) { size_t i; secp256k1_gej Qj; secp256k1_ge Q; ARG_CHECK(pubnonce != NULL); memset(pubnonce, 0, sizeof(*pubnonce)); ARG_CHECK(n >= 1); ARG_CHECK(pubnonces != NULL); secp256k1_gej_set_infinity(&Qj); for (i = 0; i < n; i++) { secp256k1_pubkey_load(ctx, &Q, pubnonces[i]); secp256k1_gej_add_ge(&Qj, &Qj, &Q); } if (secp256k1_gej_is_infinity(&Qj)) { return 0; } secp256k1_ge_set_gej(&Q, &Qj); secp256k1_pubkey_save(pubnonce, &Q); return 1; }
int secp256k1_ec_pubkey_negate(const secp256k1_context* ctx, secp256k1_pubkey *pubkey) { int ret = 0; secp256k1_ge p; VERIFY_CHECK(ctx != NULL); ARG_CHECK(pubkey != NULL); ret = secp256k1_pubkey_load(ctx, &p, pubkey); memset(pubkey, 0, sizeof(*pubkey)); if (ret) { secp256k1_ge_neg(&p, &p); secp256k1_pubkey_save(pubkey, &p); } return ret; }
/********************************************************************/ /** * Deletes a picture from the database. */ int do_delete_cmd(int args, char* argv[]) { ARG_CHECK(args, 3); struct pictdb_file db_file; int ret = do_open(argv[1], "rb+", &db_file); if (ret == 0) { puts("Delete"); ret = do_delete(&db_file, argv[2]); } do_close(&db_file); return ret; }
static int secp256k1_pubkey_load(const secp256k1_context* ctx, secp256k1_ge* ge, const secp256k1_pubkey* pubkey) { if (sizeof(secp256k1_ge_storage) == 64) { /* When the secp256k1_ge_storage type is exactly 64 byte, use its * representation inside secp256k1_pubkey, as conversion is very fast. * Note that secp256k1_pubkey_save must use the same representation. */ secp256k1_ge_storage s; memcpy(&s, &pubkey->data[0], sizeof(s)); secp256k1_ge_from_storage(ge, &s); } else { /* Otherwise, fall back to 32-byte big endian for X and Y. */ secp256k1_fe x, y; secp256k1_fe_set_b32(&x, pubkey->data); secp256k1_fe_set_b32(&y, pubkey->data + 32); secp256k1_ge_set_xy(ge, &x, &y); } ARG_CHECK(!secp256k1_fe_is_zero(&ge->x)); return 1; }
int secp256k1_ecdsa_signature_normalize(const secp256k1_context* ctx, secp256k1_ecdsa_signature *sigout, const secp256k1_ecdsa_signature *sigin) { secp256k1_scalar r, s; int ret = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(sigin != NULL); secp256k1_ecdsa_signature_load(ctx, &r, &s, sigin); ret = secp256k1_scalar_is_high(&s); if (sigout != NULL) { if (ret) { secp256k1_scalar_negate(&s, &s); } secp256k1_ecdsa_signature_save(sigout, &r, &s); } return ret; }
int secp256k1_context_randomize(secp256k1_context* ctx, const unsigned char *seed32) { VERIFY_CHECK(ctx != NULL); ARG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx)); secp256k1_ecmult_gen_blind(&ctx->ecmult_gen_ctx, seed32); return 1; }
/********************************************************************/ /** * Prepares and calls do_create command. ********************************************************************** */ int do_create_cmd(int args, char* argv[]) { ARG_CHECK(args, 2); char* filename = argv[1]; args -= 2; argv += 2; uint32_t max_files = FILE_DEFAULT; uint16_t x_thumb_res = THUMB_DEFAULT; uint16_t y_thumb_res = THUMB_DEFAULT; uint16_t x_small_res = SMALL_DEFAULT; uint16_t y_small_res = SMALL_DEFAULT; // Use of int instead of size_t for the comparison with args // For each command line argument, checks if there are enough arguments // remaining, converts the arguments to integers and assigns them to the // variable, and then checks if the variable is valid. for (int i = 0; i < args; ++i) { switch (parse_create_options(argv[i])) { case MAX_FILES: OPTION_ARG_CHECK(args, i, 1); max_files = atouint32(argv[i + 1]); if (max_files == 0 || max_files > MAX_MAX_FILES) { return ERR_MAX_FILES; } i += 1; break; case THUMB_RES: OPTION_ARG_CHECK(args, i, 2); x_thumb_res = atouint16(argv[i + 1]); y_thumb_res = atouint16(argv[i + 2]); RES_CHECK(x_thumb_res, y_thumb_res, THUMB_MAX); i += 2; break; case SMALL_RES: OPTION_ARG_CHECK(args, i, 2); x_small_res = atouint16(argv[i + 1]); y_small_res = atouint16(argv[i + 2]); RES_CHECK(x_small_res, y_small_res, SMALL_MAX); i += 2; break; case INVALID_OPTION: return ERR_INVALID_ARGUMENT; } } puts("Create"); struct pictdb_header db_header = { .max_files = max_files, .res_resized = { x_thumb_res, y_thumb_res, x_small_res, y_small_res } }; struct pictdb_file db_file = {.header = db_header }; int ret = do_create(filename, &db_file); if (ret == 0) { print_header(&db_file.header); } do_close(&db_file); return ret; }