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-rw-r--r--src/secp256k1/src/secp256k1.c655
1 files changed, 402 insertions, 253 deletions
diff --git a/src/secp256k1/src/secp256k1.c b/src/secp256k1/src/secp256k1.c
index d6192dc4ed..62d192baeb 100644
--- a/src/secp256k1/src/secp256k1.c
+++ b/src/secp256k1/src/secp256k1.c
@@ -14,150 +14,348 @@
#include "scalar_impl.h"
#include "group_impl.h"
#include "ecmult_impl.h"
+#include "ecmult_const_impl.h"
#include "ecmult_gen_impl.h"
#include "ecdsa_impl.h"
#include "eckey_impl.h"
#include "hash_impl.h"
+#define ARG_CHECK(cond) do { \
+ if (EXPECT(!(cond), 0)) { \
+ secp256k1_callback_call(&ctx->illegal_callback, #cond); \
+ return 0; \
+ } \
+} while(0)
+
+static void default_illegal_callback_fn(const char* str, void* data) {
+ (void)data;
+ fprintf(stderr, "[libsecp256k1] illegal argument: %s\n", str);
+ abort();
+}
+
+static const secp256k1_callback default_illegal_callback = {
+ default_illegal_callback_fn,
+ NULL
+};
+
+static void default_error_callback_fn(const char* str, void* data) {
+ (void)data;
+ fprintf(stderr, "[libsecp256k1] internal consistency check failed: %s\n", str);
+ abort();
+}
+
+static const secp256k1_callback default_error_callback = {
+ default_error_callback_fn,
+ NULL
+};
+
+
struct secp256k1_context_struct {
- secp256k1_ecmult_context_t ecmult_ctx;
- secp256k1_ecmult_gen_context_t ecmult_gen_ctx;
+ secp256k1_ecmult_context ecmult_ctx;
+ secp256k1_ecmult_gen_context ecmult_gen_ctx;
+ secp256k1_callback illegal_callback;
+ secp256k1_callback error_callback;
};
-secp256k1_context_t* secp256k1_context_create(int flags) {
- secp256k1_context_t* ret = (secp256k1_context_t*)checked_malloc(sizeof(secp256k1_context_t));
+secp256k1_context* secp256k1_context_create(unsigned int flags) {
+ secp256k1_context* ret = (secp256k1_context*)checked_malloc(&default_error_callback, sizeof(secp256k1_context));
+ ret->illegal_callback = default_illegal_callback;
+ ret->error_callback = default_error_callback;
+
+ if (EXPECT((flags & SECP256K1_FLAGS_TYPE_MASK) != SECP256K1_FLAGS_TYPE_CONTEXT, 0)) {
+ secp256k1_callback_call(&ret->illegal_callback,
+ "Invalid flags");
+ free(ret);
+ return NULL;
+ }
secp256k1_ecmult_context_init(&ret->ecmult_ctx);
secp256k1_ecmult_gen_context_init(&ret->ecmult_gen_ctx);
- if (flags & SECP256K1_CONTEXT_SIGN) {
- secp256k1_ecmult_gen_context_build(&ret->ecmult_gen_ctx);
+ if (flags & SECP256K1_FLAGS_BIT_CONTEXT_SIGN) {
+ secp256k1_ecmult_gen_context_build(&ret->ecmult_gen_ctx, &ret->error_callback);
}
- if (flags & SECP256K1_CONTEXT_VERIFY) {
- secp256k1_ecmult_context_build(&ret->ecmult_ctx);
+ if (flags & SECP256K1_FLAGS_BIT_CONTEXT_VERIFY) {
+ secp256k1_ecmult_context_build(&ret->ecmult_ctx, &ret->error_callback);
}
return ret;
}
-secp256k1_context_t* secp256k1_context_clone(const secp256k1_context_t* ctx) {
- secp256k1_context_t* ret = (secp256k1_context_t*)checked_malloc(sizeof(secp256k1_context_t));
- secp256k1_ecmult_context_clone(&ret->ecmult_ctx, &ctx->ecmult_ctx);
- secp256k1_ecmult_gen_context_clone(&ret->ecmult_gen_ctx, &ctx->ecmult_gen_ctx);
+secp256k1_context* secp256k1_context_clone(const secp256k1_context* ctx) {
+ secp256k1_context* ret = (secp256k1_context*)checked_malloc(&ctx->error_callback, sizeof(secp256k1_context));
+ ret->illegal_callback = ctx->illegal_callback;
+ ret->error_callback = ctx->error_callback;
+ secp256k1_ecmult_context_clone(&ret->ecmult_ctx, &ctx->ecmult_ctx, &ctx->error_callback);
+ secp256k1_ecmult_gen_context_clone(&ret->ecmult_gen_ctx, &ctx->ecmult_gen_ctx, &ctx->error_callback);
return ret;
}
-void secp256k1_context_destroy(secp256k1_context_t* ctx) {
- secp256k1_ecmult_context_clear(&ctx->ecmult_ctx);
- secp256k1_ecmult_gen_context_clear(&ctx->ecmult_gen_ctx);
+void secp256k1_context_destroy(secp256k1_context* ctx) {
+ if (ctx != NULL) {
+ secp256k1_ecmult_context_clear(&ctx->ecmult_ctx);
+ secp256k1_ecmult_gen_context_clear(&ctx->ecmult_gen_ctx);
- free(ctx);
+ free(ctx);
+ }
}
-int secp256k1_ecdsa_verify(const secp256k1_context_t* ctx, const unsigned char *msg32, const unsigned char *sig, int siglen, const unsigned char *pubkey, int pubkeylen) {
- secp256k1_ge_t q;
- secp256k1_ecdsa_sig_t s;
- secp256k1_scalar_t m;
- int ret = -3;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
- DEBUG_CHECK(msg32 != NULL);
- DEBUG_CHECK(sig != NULL);
- DEBUG_CHECK(pubkey != NULL);
+void secp256k1_context_set_illegal_callback(secp256k1_context* ctx, void (*fun)(const char* message, void* data), const void* data) {
+ if (fun == NULL) {
+ fun = default_illegal_callback_fn;
+ }
+ ctx->illegal_callback.fn = fun;
+ ctx->illegal_callback.data = data;
+}
- secp256k1_scalar_set_b32(&m, msg32, NULL);
+void secp256k1_context_set_error_callback(secp256k1_context* ctx, void (*fun)(const char* message, void* data), const void* data) {
+ if (fun == NULL) {
+ fun = default_error_callback_fn;
+ }
+ ctx->error_callback.fn = fun;
+ ctx->error_callback.data = data;
+}
- if (secp256k1_eckey_pubkey_parse(&q, pubkey, pubkeylen)) {
- if (secp256k1_ecdsa_sig_parse(&s, sig, siglen)) {
- if (secp256k1_ecdsa_sig_verify(&ctx->ecmult_ctx, &s, &q, &m)) {
- /* success is 1, all other values are fail */
- ret = 1;
- } else {
- ret = 0;
- }
- } else {
- ret = -2;
- }
+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], 64);
+ 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;
+}
+
+static void secp256k1_pubkey_save(secp256k1_pubkey* pubkey, secp256k1_ge* ge) {
+ if (sizeof(secp256k1_ge_storage) == 64) {
+ secp256k1_ge_storage s;
+ secp256k1_ge_to_storage(&s, ge);
+ memcpy(&pubkey->data[0], &s, 64);
} else {
- ret = -1;
+ VERIFY_CHECK(!secp256k1_ge_is_infinity(ge));
+ secp256k1_fe_normalize_var(&ge->x);
+ secp256k1_fe_normalize_var(&ge->y);
+ secp256k1_fe_get_b32(pubkey->data, &ge->x);
+ secp256k1_fe_get_b32(pubkey->data + 32, &ge->y);
}
+}
+
+int secp256k1_ec_pubkey_parse(const secp256k1_context* ctx, secp256k1_pubkey* pubkey, const unsigned char *input, size_t inputlen) {
+ secp256k1_ge Q;
+
+ (void)ctx;
+ VERIFY_CHECK(ctx != NULL);
+ ARG_CHECK(pubkey != NULL);
+ memset(pubkey, 0, sizeof(*pubkey));
+ ARG_CHECK(input != NULL);
+ if (!secp256k1_eckey_pubkey_parse(&Q, input, inputlen)) {
+ return 0;
+ }
+ secp256k1_pubkey_save(pubkey, &Q);
+ secp256k1_ge_clear(&Q);
+ return 1;
+}
+
+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;
+ (void)ctx;
+ 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;
}
-static int nonce_function_rfc6979(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, unsigned int counter, const void *data) {
- secp256k1_rfc6979_hmac_sha256_t rng;
- unsigned int i;
- secp256k1_rfc6979_hmac_sha256_initialize(&rng, key32, 32, msg32, 32, (const unsigned char*)data, data != NULL ? 32 : 0);
- for (i = 0; i <= counter; i++) {
- secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
- }
- secp256k1_rfc6979_hmac_sha256_finalize(&rng);
- return 1;
+static void secp256k1_ecdsa_signature_load(const secp256k1_context* ctx, secp256k1_scalar* r, secp256k1_scalar* s, const secp256k1_ecdsa_signature* sig) {
+ (void)ctx;
+ if (sizeof(secp256k1_scalar) == 32) {
+ /* When the secp256k1_scalar type is exactly 32 byte, use its
+ * representation inside secp256k1_ecdsa_signature, as conversion is very fast.
+ * Note that secp256k1_ecdsa_signature_save must use the same representation. */
+ memcpy(r, &sig->data[0], 32);
+ memcpy(s, &sig->data[32], 32);
+ } else {
+ secp256k1_scalar_set_b32(r, &sig->data[0], NULL);
+ secp256k1_scalar_set_b32(s, &sig->data[32], NULL);
+ }
}
-const secp256k1_nonce_function_t secp256k1_nonce_function_rfc6979 = nonce_function_rfc6979;
-const secp256k1_nonce_function_t secp256k1_nonce_function_default = nonce_function_rfc6979;
+static void secp256k1_ecdsa_signature_save(secp256k1_ecdsa_signature* sig, const secp256k1_scalar* r, const secp256k1_scalar* s) {
+ if (sizeof(secp256k1_scalar) == 32) {
+ memcpy(&sig->data[0], r, 32);
+ memcpy(&sig->data[32], s, 32);
+ } else {
+ secp256k1_scalar_get_b32(&sig->data[0], r);
+ secp256k1_scalar_get_b32(&sig->data[32], s);
+ }
+}
-int secp256k1_ecdsa_sign(const secp256k1_context_t* ctx, const unsigned char *msg32, unsigned char *signature, int *signaturelen, const unsigned char *seckey, secp256k1_nonce_function_t noncefp, const void* noncedata) {
- secp256k1_ecdsa_sig_t sig;
- secp256k1_scalar_t sec, non, msg;
- int ret = 0;
+int secp256k1_ecdsa_signature_parse_der(const secp256k1_context* ctx, secp256k1_ecdsa_signature* sig, const unsigned char *input, size_t inputlen) {
+ secp256k1_scalar r, s;
+
+ (void)ctx;
+ ARG_CHECK(sig != NULL);
+ ARG_CHECK(input != NULL);
+
+ if (secp256k1_ecdsa_sig_parse(&r, &s, input, inputlen)) {
+ secp256k1_ecdsa_signature_save(sig, &r, &s);
+ return 1;
+ } else {
+ memset(sig, 0, sizeof(*sig));
+ return 0;
+ }
+}
+
+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;
- unsigned int count = 0;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
- DEBUG_CHECK(msg32 != NULL);
- DEBUG_CHECK(signature != NULL);
- DEBUG_CHECK(signaturelen != NULL);
- DEBUG_CHECK(seckey != NULL);
- if (noncefp == NULL) {
- noncefp = secp256k1_nonce_function_default;
+
+ (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;
+}
- secp256k1_scalar_set_b32(&sec, seckey, &overflow);
- /* Fail if the secret key is invalid. */
- if (!overflow && !secp256k1_scalar_is_zero(&sec)) {
- secp256k1_scalar_set_b32(&msg, msg32, NULL);
- while (1) {
- unsigned char nonce32[32];
- ret = noncefp(nonce32, msg32, seckey, count, noncedata);
- if (!ret) {
- break;
- }
- secp256k1_scalar_set_b32(&non, nonce32, &overflow);
- memset(nonce32, 0, 32);
- if (!secp256k1_scalar_is_zero(&non) && !overflow) {
- if (secp256k1_ecdsa_sig_sign(&ctx->ecmult_gen_ctx, &sig, &sec, &msg, &non, NULL)) {
- break;
- }
- }
- count++;
- }
+int secp256k1_ecdsa_signature_serialize_der(const secp256k1_context* ctx, unsigned char *output, size_t *outputlen, const secp256k1_ecdsa_signature* sig) {
+ secp256k1_scalar r, s;
+
+ (void)ctx;
+ ARG_CHECK(output != NULL);
+ ARG_CHECK(outputlen != NULL);
+ ARG_CHECK(sig != NULL);
+
+ secp256k1_ecdsa_signature_load(ctx, &r, &s, sig);
+ return secp256k1_ecdsa_sig_serialize(output, outputlen, &r, &s);
+}
+
+int secp256k1_ecdsa_signature_serialize_compact(const secp256k1_context* ctx, unsigned char *output64, const secp256k1_ecdsa_signature* sig) {
+ secp256k1_scalar r, s;
+
+ (void)ctx;
+ ARG_CHECK(output64 != NULL);
+ ARG_CHECK(sig != NULL);
+
+ secp256k1_ecdsa_signature_load(ctx, &r, &s, sig);
+ secp256k1_scalar_get_b32(&output64[0], &r);
+ secp256k1_scalar_get_b32(&output64[32], &s);
+ 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) {
- ret = secp256k1_ecdsa_sig_serialize(signature, signaturelen, &sig);
+ secp256k1_scalar_negate(&s, &s);
}
- secp256k1_scalar_clear(&msg);
- secp256k1_scalar_clear(&non);
- secp256k1_scalar_clear(&sec);
- }
- if (!ret) {
- *signaturelen = 0;
+ secp256k1_ecdsa_signature_save(sigout, &r, &s);
}
+
return ret;
}
-int secp256k1_ecdsa_sign_compact(const secp256k1_context_t* ctx, const unsigned char *msg32, unsigned char *sig64, const unsigned char *seckey, secp256k1_nonce_function_t noncefp, const void* noncedata, int *recid) {
- secp256k1_ecdsa_sig_t sig;
- secp256k1_scalar_t sec, non, msg;
+int secp256k1_ecdsa_verify(const secp256k1_context* ctx, const secp256k1_ecdsa_signature *sig, const unsigned char *msg32, const secp256k1_pubkey *pubkey) {
+ secp256k1_ge q;
+ secp256k1_scalar r, s;
+ secp256k1_scalar m;
+ VERIFY_CHECK(ctx != NULL);
+ ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
+ ARG_CHECK(msg32 != NULL);
+ ARG_CHECK(sig != NULL);
+ ARG_CHECK(pubkey != NULL);
+
+ secp256k1_scalar_set_b32(&m, msg32, NULL);
+ secp256k1_ecdsa_signature_load(ctx, &r, &s, sig);
+ return (!secp256k1_scalar_is_high(&s) &&
+ secp256k1_pubkey_load(ctx, &q, pubkey) &&
+ secp256k1_ecdsa_sig_verify(&ctx->ecmult_ctx, &r, &s, &q, &m));
+}
+
+static int nonce_function_rfc6979(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, const unsigned char *algo16, void *data, unsigned int counter) {
+ unsigned char keydata[112];
+ int keylen = 64;
+ secp256k1_rfc6979_hmac_sha256_t rng;
+ unsigned int i;
+ /* We feed a byte array to the PRNG as input, consisting of:
+ * - the private key (32 bytes) and message (32 bytes), see RFC 6979 3.2d.
+ * - optionally 32 extra bytes of data, see RFC 6979 3.6 Additional Data.
+ * - optionally 16 extra bytes with the algorithm name.
+ * Because the arguments have distinct fixed lengths it is not possible for
+ * different argument mixtures to emulate each other and result in the same
+ * nonces.
+ */
+ memcpy(keydata, key32, 32);
+ memcpy(keydata + 32, msg32, 32);
+ if (data != NULL) {
+ memcpy(keydata + 64, data, 32);
+ keylen = 96;
+ }
+ if (algo16 != NULL) {
+ memcpy(keydata + keylen, algo16, 16);
+ keylen += 16;
+ }
+ secp256k1_rfc6979_hmac_sha256_initialize(&rng, keydata, keylen);
+ memset(keydata, 0, sizeof(keydata));
+ for (i = 0; i <= counter; i++) {
+ secp256k1_rfc6979_hmac_sha256_generate(&rng, nonce32, 32);
+ }
+ secp256k1_rfc6979_hmac_sha256_finalize(&rng);
+ return 1;
+}
+
+const secp256k1_nonce_function secp256k1_nonce_function_rfc6979 = nonce_function_rfc6979;
+const secp256k1_nonce_function secp256k1_nonce_function_default = nonce_function_rfc6979;
+
+int secp256k1_ecdsa_sign(const secp256k1_context* ctx, secp256k1_ecdsa_signature *signature, const unsigned char *msg32, const unsigned char *seckey, secp256k1_nonce_function noncefp, const void* noncedata) {
+ secp256k1_scalar r, s;
+ secp256k1_scalar sec, non, msg;
int ret = 0;
int overflow = 0;
- unsigned int count = 0;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
- DEBUG_CHECK(msg32 != NULL);
- DEBUG_CHECK(sig64 != NULL);
- DEBUG_CHECK(seckey != NULL);
+ VERIFY_CHECK(ctx != NULL);
+ ARG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
+ ARG_CHECK(msg32 != NULL);
+ ARG_CHECK(signature != NULL);
+ ARG_CHECK(seckey != NULL);
if (noncefp == NULL) {
noncefp = secp256k1_nonce_function_default;
}
@@ -165,139 +363,87 @@ int secp256k1_ecdsa_sign_compact(const secp256k1_context_t* ctx, const unsigned
secp256k1_scalar_set_b32(&sec, seckey, &overflow);
/* Fail if the secret key is invalid. */
if (!overflow && !secp256k1_scalar_is_zero(&sec)) {
+ unsigned int count = 0;
secp256k1_scalar_set_b32(&msg, msg32, NULL);
while (1) {
unsigned char nonce32[32];
- ret = noncefp(nonce32, msg32, seckey, count, noncedata);
+ ret = noncefp(nonce32, msg32, seckey, NULL, (void*)noncedata, count);
if (!ret) {
break;
}
secp256k1_scalar_set_b32(&non, nonce32, &overflow);
memset(nonce32, 0, 32);
- if (!secp256k1_scalar_is_zero(&non) && !overflow) {
- if (secp256k1_ecdsa_sig_sign(&ctx->ecmult_gen_ctx, &sig, &sec, &msg, &non, recid)) {
+ if (!overflow && !secp256k1_scalar_is_zero(&non)) {
+ if (secp256k1_ecdsa_sig_sign(&ctx->ecmult_gen_ctx, &r, &s, &sec, &msg, &non, NULL)) {
break;
}
}
count++;
}
- if (ret) {
- secp256k1_scalar_get_b32(sig64, &sig.r);
- secp256k1_scalar_get_b32(sig64 + 32, &sig.s);
- }
secp256k1_scalar_clear(&msg);
secp256k1_scalar_clear(&non);
secp256k1_scalar_clear(&sec);
}
- if (!ret) {
- memset(sig64, 0, 64);
- }
- return ret;
-}
-
-int secp256k1_ecdsa_recover_compact(const secp256k1_context_t* ctx, const unsigned char *msg32, const unsigned char *sig64, unsigned char *pubkey, int *pubkeylen, int compressed, int recid) {
- secp256k1_ge_t q;
- secp256k1_ecdsa_sig_t sig;
- secp256k1_scalar_t m;
- int ret = 0;
- int overflow = 0;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
- DEBUG_CHECK(msg32 != NULL);
- DEBUG_CHECK(sig64 != NULL);
- DEBUG_CHECK(pubkey != NULL);
- DEBUG_CHECK(pubkeylen != NULL);
- DEBUG_CHECK(recid >= 0 && recid <= 3);
-
- secp256k1_scalar_set_b32(&sig.r, sig64, &overflow);
- if (!overflow) {
- secp256k1_scalar_set_b32(&sig.s, sig64 + 32, &overflow);
- if (!overflow) {
- secp256k1_scalar_set_b32(&m, msg32, NULL);
-
- if (secp256k1_ecdsa_sig_recover(&ctx->ecmult_ctx, &sig, &q, &m, recid)) {
- ret = secp256k1_eckey_pubkey_serialize(&q, pubkey, pubkeylen, compressed);
- }
- }
+ if (ret) {
+ secp256k1_ecdsa_signature_save(signature, &r, &s);
+ } else {
+ memset(signature, 0, sizeof(*signature));
}
return ret;
}
-int secp256k1_ec_seckey_verify(const secp256k1_context_t* ctx, const unsigned char *seckey) {
- secp256k1_scalar_t sec;
+int secp256k1_ec_seckey_verify(const secp256k1_context* ctx, const unsigned char *seckey) {
+ secp256k1_scalar sec;
int ret;
int overflow;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(seckey != NULL);
+ VERIFY_CHECK(ctx != NULL);
+ ARG_CHECK(seckey != NULL);
(void)ctx;
secp256k1_scalar_set_b32(&sec, seckey, &overflow);
- ret = !secp256k1_scalar_is_zero(&sec) && !overflow;
+ ret = !overflow && !secp256k1_scalar_is_zero(&sec);
secp256k1_scalar_clear(&sec);
return ret;
}
-int secp256k1_ec_pubkey_verify(const secp256k1_context_t* ctx, const unsigned char *pubkey, int pubkeylen) {
- secp256k1_ge_t q;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(pubkey != NULL);
- (void)ctx;
-
- return secp256k1_eckey_pubkey_parse(&q, pubkey, pubkeylen);
-}
-
-int secp256k1_ec_pubkey_create(const secp256k1_context_t* ctx, unsigned char *pubkey, int *pubkeylen, const unsigned char *seckey, int compressed) {
- secp256k1_gej_t pj;
- secp256k1_ge_t p;
- secp256k1_scalar_t sec;
+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;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
- DEBUG_CHECK(pubkey != NULL);
- DEBUG_CHECK(pubkeylen != NULL);
- DEBUG_CHECK(seckey != NULL);
+ 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);
- if (!overflow) {
+ ret = (!overflow) & (!secp256k1_scalar_is_zero(&sec));
+ if (ret) {
secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &pj, &sec);
- secp256k1_scalar_clear(&sec);
secp256k1_ge_set_gej(&p, &pj);
- ret = secp256k1_eckey_pubkey_serialize(&p, pubkey, pubkeylen, compressed);
- }
- if (!ret) {
- *pubkeylen = 0;
- }
- return ret;
-}
-
-int secp256k1_ec_pubkey_decompress(const secp256k1_context_t* ctx, unsigned char *pubkey, int *pubkeylen) {
- secp256k1_ge_t p;
- int ret = 0;
- DEBUG_CHECK(pubkey != NULL);
- DEBUG_CHECK(pubkeylen != NULL);
- (void)ctx;
-
- if (secp256k1_eckey_pubkey_parse(&p, pubkey, *pubkeylen)) {
- ret = secp256k1_eckey_pubkey_serialize(&p, pubkey, pubkeylen, 0);
+ secp256k1_pubkey_save(pubkey, &p);
}
+ secp256k1_scalar_clear(&sec);
return ret;
}
-int secp256k1_ec_privkey_tweak_add(const secp256k1_context_t* ctx, unsigned char *seckey, const unsigned char *tweak) {
- secp256k1_scalar_t term;
- secp256k1_scalar_t sec;
+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;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(seckey != NULL);
- DEBUG_CHECK(tweak != NULL);
+ 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 = secp256k1_eckey_privkey_tweak_add(&sec, &term) && !overflow;
+ ret = !overflow && secp256k1_eckey_privkey_tweak_add(&sec, &term);
+ memset(seckey, 0, 32);
if (ret) {
secp256k1_scalar_get_b32(seckey, &sec);
}
@@ -307,45 +453,44 @@ int secp256k1_ec_privkey_tweak_add(const secp256k1_context_t* ctx, unsigned char
return ret;
}
-int secp256k1_ec_pubkey_tweak_add(const secp256k1_context_t* ctx, unsigned char *pubkey, int pubkeylen, const unsigned char *tweak) {
- secp256k1_ge_t p;
- secp256k1_scalar_t term;
+int secp256k1_ec_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const unsigned char *tweak) {
+ secp256k1_ge p;
+ secp256k1_scalar term;
int ret = 0;
int overflow = 0;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
- DEBUG_CHECK(pubkey != NULL);
- DEBUG_CHECK(tweak != NULL);
+ 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(&term, tweak, &overflow);
- if (!overflow) {
- ret = secp256k1_eckey_pubkey_parse(&p, pubkey, pubkeylen);
- if (ret) {
- ret = secp256k1_eckey_pubkey_tweak_add(&ctx->ecmult_ctx, &p, &term);
- }
- if (ret) {
- int oldlen = pubkeylen;
- ret = secp256k1_eckey_pubkey_serialize(&p, pubkey, &pubkeylen, oldlen <= 33);
- VERIFY_CHECK(pubkeylen == oldlen);
+ ret = !overflow && secp256k1_pubkey_load(ctx, &p, pubkey);
+ memset(pubkey, 0, sizeof(*pubkey));
+ if (ret) {
+ if (secp256k1_eckey_pubkey_tweak_add(&ctx->ecmult_ctx, &p, &term)) {
+ secp256k1_pubkey_save(pubkey, &p);
+ } else {
+ ret = 0;
}
}
return ret;
}
-int secp256k1_ec_privkey_tweak_mul(const secp256k1_context_t* ctx, unsigned char *seckey, const unsigned char *tweak) {
- secp256k1_scalar_t factor;
- secp256k1_scalar_t sec;
+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;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(seckey != NULL);
- DEBUG_CHECK(tweak != NULL);
+ VERIFY_CHECK(ctx != NULL);
+ ARG_CHECK(seckey != NULL);
+ ARG_CHECK(tweak != NULL);
(void)ctx;
secp256k1_scalar_set_b32(&factor, tweak, &overflow);
secp256k1_scalar_set_b32(&sec, seckey, NULL);
- ret = secp256k1_eckey_privkey_tweak_mul(&sec, &factor) && !overflow;
+ ret = !overflow && secp256k1_eckey_privkey_tweak_mul(&sec, &factor);
+ memset(seckey, 0, 32);
if (ret) {
secp256k1_scalar_get_b32(seckey, &sec);
}
@@ -355,65 +500,69 @@ int secp256k1_ec_privkey_tweak_mul(const secp256k1_context_t* ctx, unsigned char
return ret;
}
-int secp256k1_ec_pubkey_tweak_mul(const secp256k1_context_t* ctx, unsigned char *pubkey, int pubkeylen, const unsigned char *tweak) {
- secp256k1_ge_t p;
- secp256k1_scalar_t factor;
+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;
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
- DEBUG_CHECK(pubkey != NULL);
- DEBUG_CHECK(tweak != NULL);
+ 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) {
- ret = secp256k1_eckey_pubkey_parse(&p, pubkey, pubkeylen);
- if (ret) {
- ret = secp256k1_eckey_pubkey_tweak_mul(&ctx->ecmult_ctx, &p, &factor);
- }
- if (ret) {
- int oldlen = pubkeylen;
- ret = secp256k1_eckey_pubkey_serialize(&p, pubkey, &pubkeylen, oldlen <= 33);
- VERIFY_CHECK(pubkeylen == oldlen);
+ ret = !overflow && secp256k1_pubkey_load(ctx, &p, pubkey);
+ memset(pubkey, 0, sizeof(*pubkey));
+ if (ret) {
+ if (secp256k1_eckey_pubkey_tweak_mul(&ctx->ecmult_ctx, &p, &factor)) {
+ secp256k1_pubkey_save(pubkey, &p);
+ } else {
+ ret = 0;
}
}
return ret;
}
-int secp256k1_ec_privkey_export(const secp256k1_context_t* ctx, const unsigned char *seckey, unsigned char *privkey, int *privkeylen, int compressed) {
- secp256k1_scalar_t key;
- int ret = 0;
- DEBUG_CHECK(seckey != NULL);
- DEBUG_CHECK(privkey != NULL);
- DEBUG_CHECK(privkeylen != NULL);
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
-
- secp256k1_scalar_set_b32(&key, seckey, NULL);
- ret = secp256k1_eckey_privkey_serialize(&ctx->ecmult_gen_ctx, privkey, privkeylen, &key, compressed);
- secp256k1_scalar_clear(&key);
- 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;
}
-int secp256k1_ec_privkey_import(const secp256k1_context_t* ctx, unsigned char *seckey, const unsigned char *privkey, int privkeylen) {
- secp256k1_scalar_t key;
- int ret = 0;
- DEBUG_CHECK(seckey != NULL);
- DEBUG_CHECK(privkey != NULL);
- (void)ctx;
+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;
- ret = secp256k1_eckey_privkey_parse(&key, privkey, privkeylen);
- if (ret) {
- secp256k1_scalar_get_b32(seckey, &key);
- }
- secp256k1_scalar_clear(&key);
- return ret;
-}
+ ARG_CHECK(pubnonce != NULL);
+ memset(pubnonce, 0, sizeof(*pubnonce));
+ ARG_CHECK(n >= 1);
+ ARG_CHECK(pubnonces != NULL);
-int secp256k1_context_randomize(secp256k1_context_t* ctx, const unsigned char *seed32) {
- DEBUG_CHECK(ctx != NULL);
- DEBUG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
- secp256k1_ecmult_gen_blind(&ctx->ecmult_gen_ctx, seed32);
+ 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;
}
+
+#ifdef ENABLE_MODULE_ECDH
+# include "modules/ecdh/main_impl.h"
+#endif
+
+#ifdef ENABLE_MODULE_SCHNORR
+# include "modules/schnorr/main_impl.h"
+#endif
+
+#ifdef ENABLE_MODULE_RECOVERY
+# include "modules/recovery/main_impl.h"
+#endif
generated by cgit v1.2.3 (git 2.26.2) at 2024-08-23 12:53:07 +0000