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Stable release v32.1bitcoin/bitcoin · f0de87f04062 ↗3,020 source files · 47.5 MB stored on the server440 file guides

Release published 2026-10-28 · Snapshot fetched 2026-11-01. Latest stable release at fetch time; development branches and Git history are excluded. Only the selected code window and visible folders load here.

bitcoin / bitcoinstable

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▤ secp256k1_ellswift.h

▤ secp256k1_extrakeys.h

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bitcoin / src / secp256k1 / include / secp256k1.h

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751 *  Args:   ctx:    pointer to a context object
752 *  In/Out: seckey: pointer to the 32-byte secret key to be negated. If the
753 *                  secret key is invalid according to
754 *                  secp256k1_ec_seckey_verify, this function returns 0 and
755 *                  seckey will be set to some unspecified value.
756 */
757SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_seckey_negate(
758    const secp256k1_context *ctx,
759    unsigned char *seckey
760) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2);
761
762/** Negates a public key in place.
763 *
764 *  Returns: 1 always
765 *  Args:   ctx:        pointer to a context object
766 *  In/Out: pubkey:     pointer to the public key to be negated.
767 */
768SECP256K1_API int secp256k1_ec_pubkey_negate(
769    const secp256k1_context *ctx,
770    secp256k1_pubkey *pubkey
771) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2);
772
773/** Tweak a secret key by adding tweak to it.
774 *
775 *  Returns: 0 if the arguments are invalid or the resulting secret key would be
776 *           invalid (only when the tweak is the negation of the secret key). 1
777 *           otherwise.
778 *  Args:    ctx:   pointer to a context object.
779 *  In/Out: seckey: pointer to a 32-byte secret key. If the secret key is
780 *                  invalid according to secp256k1_ec_seckey_verify, this
781 *                  function returns 0. seckey will be set to some unspecified
782 *                  value if this function returns 0.
783 *  In:    tweak32: pointer to a 32-byte tweak, which must be valid according to
784 *                  secp256k1_ec_seckey_verify or 32 zero bytes. For uniformly
785 *                  random 32-byte tweaks, the chance of being invalid is
786 *                  negligible (around 1 in 2^128).
787 */
788SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_seckey_tweak_add(
789    const secp256k1_context *ctx,
790    unsigned char *seckey,
791    const unsigned char *tweak32
792) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
793
794/** Tweak a public key by adding tweak times the generator to it.
795 *
796 *  Returns: 0 if the arguments are invalid or the resulting public key would be
797 *           invalid (only when the tweak is the negation of the corresponding
798 *           secret key). 1 otherwise.
799 *  Args:    ctx:   pointer to a context object.
800 *  In/Out: pubkey: pointer to a public key object. pubkey will be set to an
801 *                  invalid value if this function returns 0.
802 *  In:    tweak32: pointer to a 32-byte tweak, which must be valid according to
803 *                  secp256k1_ec_seckey_verify or 32 zero bytes. For uniformly
804 *                  random 32-byte tweaks, the chance of being invalid is
805 *                  negligible (around 1 in 2^128).
806 */
807SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_pubkey_tweak_add(
808    const secp256k1_context *ctx,
809    secp256k1_pubkey *pubkey,
810    const unsigned char *tweak32
811) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
812
813/** Tweak a secret key by multiplying it by a tweak.
814 *
815 *  Returns: 0 if the arguments are invalid. 1 otherwise.
816 *  Args:   ctx:    pointer to a context object.
817 *  In/Out: seckey: pointer to a 32-byte secret key. If the secret key is
818 *                  invalid according to secp256k1_ec_seckey_verify, this
819 *                  function returns 0. seckey will be set to some unspecified
820 *                  value if this function returns 0.
821 *  In:    tweak32: pointer to a 32-byte tweak. If the tweak is invalid according to
822 *                  secp256k1_ec_seckey_verify, this function returns 0. For
823 *                  uniformly random 32-byte arrays the chance of being invalid
824 *                  is negligible (around 1 in 2^128).
825 */
826SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_seckey_tweak_mul(
827    const secp256k1_context *ctx,
828    unsigned char *seckey,
829    const unsigned char *tweak32
830) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
831
832/** Tweak a public key by multiplying it by a tweak value.
833 *
834 *  Returns: 0 if the arguments are invalid. 1 otherwise.
835 *  Args:    ctx:   pointer to a context object.
836 *  In/Out: pubkey: pointer to a public key object. pubkey will be set to an
837 *                  invalid value if this function returns 0.
838 *  In:    tweak32: pointer to a 32-byte tweak. If the tweak is invalid according to
839 *                  secp256k1_ec_seckey_verify, this function returns 0. For
840 *                  uniformly random 32-byte arrays the chance of being invalid
841 *                  is negligible (around 1 in 2^128).
842 */
843SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_pubkey_tweak_mul(
844    const secp256k1_context *ctx,
845    secp256k1_pubkey *pubkey,
846    const unsigned char *tweak32
847) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
848
849/** Randomizes the context to provide enhanced protection against side-channel leakage.
850 *
851 *  Returns: 1: randomization successful
852 *           0: error
853 *  Args:    ctx:       pointer to a context object (not secp256k1_context_static).
854 *  In:      seed32:    pointer to a 32-byte random seed (NULL resets to initial state).
855 *
856 * While secp256k1 code is written and tested to be constant-time no matter what
857 * secret values are, it is possible that a compiler may output code which is not,
858 * and also that the CPU may not emit the same radio frequencies or draw the same
859 * amount of power for all values. Randomization of the context shields against
860 * side-channel observations which aim to exploit secret-dependent behaviour in
861 * certain computations which involve secret keys.
862 *
863 * It is highly recommended to call this function on contexts returned from
864 * secp256k1_context_create or secp256k1_context_clone (or from the corresponding
865 * functions in secp256k1_preallocated.h) before using these contexts to call API
866 * functions that perform computations involving secret keys, e.g., signing and
867 * public key generation. It is possible to call this function more than once on
868 * the same context, and doing so before every few computations involving secret
869 * keys is recommended as a defense-in-depth measure. Randomization of the static
870 * context secp256k1_context_static is not supported.
871 *
872 * Currently, the random seed is mainly used for blinding multiplications of a
873 * secret scalar with the elliptic curve base point. Multiplications of this
874 * kind are performed by exactly those API functions which are documented to
875 * require a context that is not secp256k1_context_static. As a rule of thumb,
876 * these are all functions which take a secret key (or a keypair) as an input.
877 * A notable exception to that rule is the ECDH module, which relies on a different
878 * kind of elliptic curve point multiplication and thus does not benefit from
879 * enhanced protection against side-channel leakage currently.
880 */
881SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_context_randomize(
882    secp256k1_context *ctx,
883    const unsigned char *seed32
884) SECP256K1_ARG_NONNULL(1);
885
886/** Add a number of public keys together.
887 *
888 *  Returns: 1: the sum of the public keys is valid.
889 *           0: the sum of the public keys is not valid.
890 *  Args:   ctx:        pointer to a context object.
891 *  Out:    out:        pointer to a public key object for placing the resulting public key.
892 *  In:     ins:        pointer to array of pointers to public keys.
893 *          n:          the number of public keys to add together (must be at least 1).
894 */
895SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_pubkey_combine(
896    const secp256k1_context *ctx,
897    secp256k1_pubkey *out,
898    const secp256k1_pubkey * const *ins,
899    size_t n
900) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
901
902/** Compute a tagged hash as defined in BIP-340.
903 *
904 *  This is useful for creating a message hash and achieving domain separation
905 *  through an application-specific tag. This function returns
906 *  SHA256(SHA256(tag)||SHA256(tag)||msg). Therefore, tagged hash
907 *  implementations optimized for a specific tag can precompute the SHA256 state
908 *  after hashing the tag hashes.
909 *
910 *  Returns: 1 always.
911 *  Args:    ctx: pointer to a context object
912 *  Out:  hash32: pointer to a 32-byte array to store the resulting hash
913 *  In:      tag: pointer to an array containing the tag
914 *        taglen: length of the tag array
915 *           msg: pointer to an array containing the message
916 *        msglen: length of the message array
917 */
918SECP256K1_API int secp256k1_tagged_sha256(
919    const secp256k1_context *ctx,
920    unsigned char *hash32,
921    const unsigned char *tag,
922    size_t taglen,
923    const unsigned char *msg,
924    size_t msglen
925) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(5);
926
927#ifdef __cplusplus
928}
929#endif
930
931#endif /* SECP256K1_H */
932

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cmake/bitcoin-build-config.h.in src/consensus/amount.h src/consensus/consensus.h src/primitives/block.h src/primitives/transaction.h src/crypto/sha256.h src/util/moneystr.h src/clientversion.h src/uint256.h src/script/script.h src/policy/policy.h CMakeLists.txt README.md COPYING src/consensus/tx_check.cpp src/consensus/tx_verify.cpp src/consensus/merkle.cpp src/pow.cpp src/validation.cpp src/script/interpreter.cpp src/script/solver.cpp src/script/sign.cpp src/key_io.cpp src/net.cpp src/net_processing.cpp src/netaddress.cpp src/protocol.h src/wallet/wallet.cpp src/wallet/spend.cpp

← Previous 250 linesCode page 4

src/wallet/receive.cpp

src/wallet/coinselection.cpp

src/consensus/validation.h

src/primitives/transaction.cpp

src/script/descriptor.cpp

src/bitcoin-cli.cpp

src/rpc/blockchain.cpp

src/rpc/rawtransaction.cpp

src/init.cpp

src/crypto/sha256.cpp

src/consensus/merkle.h

src/consensus/tx_check.h

src/consensus/tx_verify.h

src/policy/feerate.h

src/policy/feerate.cpp

src/primitives/transaction_identifier.h

src/chainparamsbase.h

src/chainparamsbase.cpp

src/util/moneystr.cpp

src/crypto/ripemd160.h

src/crypto/sha1.h

src/crypto/sha512.h

src/crypto/hmac_sha256.h

src/crypto/hmac_sha512.h

src/crypto/hmac_sha256.cpp

src/crypto/hmac_sha512.cpp

src/crypto/hkdf_sha256_32.h

src/crypto/hkdf_sha256_32.cpp

src/support/cleanse.h

src/support/cleanse.cpp

src/crypto/siphash.cpp

src/crypto/muhash.h

src/crypto/chacha20.h

src/crypto/poly1305.h

src/crypto/chacha20poly1305.h

src/crypto/chacha20poly1305.cpp

src/util/chaintype.cpp

src/util/obfuscation.h

src/util/byte_units.h

src/util/overflow.h

src/blockencodings.cpp

src/net_permissions.cpp

src/policy/packages.cpp

src/policy/rbf.cpp

src/policy/truc_policy.cpp

src/policy/ephemeral_policy.cpp

src/policy/settings.cpp

src/policy/policy.cpp

src/node/transaction.cpp

src/node/coin.cpp

src/rpc/client.cpp

src/rpc/external_signer.cpp

src/rpc/request.cpp

src/rpc/server_util.cpp

src/rpc/fees.cpp

src/rpc/output_script.cpp

src/rpc/rawtransaction_util.cpp

src/rpc/rawtransaction_util.h

src/rpc/register.h

src/rpc/request.h

src/rpc/server_util.h

src/rpc/protocol.h

src/rpc/server.h

src/rpc/signmessage.cpp

src/rpc/txoutproof.cpp

src/rpc/util.cpp

src/rpc/util.h

src/wallet/rpc/addresses.cpp

src/wallet/rpc/backup.cpp

src/wallet/rpc/coins.cpp

src/wallet/rpc/encrypt.cpp

src/wallet/rpc/signmessage.cpp

src/wallet/rpc/util.cpp

src/wallet/rpc/util.h

src/wallet/coincontrol.cpp

src/wallet/coincontrol.h

src/wallet/context.cpp

src/wallet/context.h

src/wallet/crypter.cpp

src/wallet/crypter.h

src/wallet/db.cpp

src/wallet/export.cpp

src/wallet/external_signer_scriptpubkeyman.cpp

src/wallet/rpc/spend.cpp

src/wallet/rpc/transactions.cpp

src/wallet/rpc/wallet.cpp

src/wallet/feebumper.cpp

src/wallet/feebumper.h

src/index/base.h

src/index/base.cpp

src/index/txindex.h

src/index/txindex.cpp

src/index/txindex_key.h

src/index/txospenderindex.h

src/index/txospenderindex.cpp

src/index/blockfilterindex.h

src/index/blockfilterindex.cpp

src/index/coinstatsindex.h

src/index/coinstatsindex.cpp

src/index/db_key.h

src/index/disktxpos.h

src/kernel/chain.cpp

src/kernel/chain.h

src/kernel/checks.cpp

src/kernel/checks.h

src/kernel/context.cpp

src/kernel/context.h

src/kernel/cs_main.cpp

src/kernel/cs_main.h

src/kernel/disconnected_transactions.cpp

src/kernel/disconnected_transactions.h

src/kernel/mempool_removal_reason.cpp

src/kernel/mempool_removal_reason.h

src/kernel/coinstats.cpp

src/kernel/coinstats.h

src/kernel/chainparams.cpp

src/kernel/chainparams.h

src/wallet/sqlite.cpp

src/wallet/sqlite.h

src/wallet/transaction.cpp

src/wallet/transaction.h

src/wallet/dump.cpp

src/wallet/dump.h

src/wallet/init.cpp

src/wallet/walletutil.cpp

src/wallet/walletutil.h

src/wallet/wallettool.cpp

src/wallet/wallettool.h

src/wallet/export.h

src/wallet/migrate.cpp

src/wallet/migrate.h

src/wallet/db.h

src/wallet/walletdb.cpp

src/wallet/interfaces.cpp

src/wallet/scriptpubkeyman.cpp

src/wallet/scriptpubkeyman.h

src/kernel/bitcoinkernel.cpp

src/kernel/bitcoinkernel.h

src/kernel/bitcoinkernel_wrapper.h

src/node/chainstate.cpp

src/node/chainstate.h

src/node/blockstorage.cpp

src/node/blockstorage.h

src/node/mempool_persist.cpp

src/node/mempool_persist.h

src/node/utxo_snapshot.cpp

src/node/utxo_snapshot.h

src/node/kernel_notifications.cpp

src/node/kernel_notifications.h

src/node/blockmanager_args.cpp

src/kernel/blockmanager_opts.h

src/util/expected.cpp

src/policy/settings.h

src/util/types.h

src/kernel/messagestartchars.h

src/kernel/warning.h

src/util/exception.h

src/common/license_info.h

src/node/coins_view_args.h

src/node/database_args.h

src/util/batchpriority.h

src/util/ui_change_type.h

src/node/coins_view_args.cpp

src/node/peerman_args.h

src/util/serfloat.h

src/node/blockmanager_args.h

src/node/database_args.cpp

src/util/overloaded.h

src/interfaces/types.h

src/node/chainstatemanager_args.h

src/node/minisketchwrapper.h

src/util/macros.h

src/util/syserror.h

src/common/run_command.h

src/util/bytevectorhash.cpp

src/node/mempool_persist_args.cpp

src/util/exec.h

src/util/rbf.h

src/crypto/hex_base.h

src/node/mempool_persist_args.h

src/interfaces/echo.h

src/util/any.h

src/util/batchpriority.cpp

src/util/threadnames.h

src/node/coin.h

src/node/mempool_args.h

src/util/asmap.h

src/util/bytevectorhash.h

src/node/context.cpp

src/util/insert.h

src/util/readwritefile.h

src/node/peerman_args.cpp

src/node/interface_ui.cpp

src/interfaces/handler.h

src/node/mining_args.h

src/util/hasher.cpp

src/common/init.h

src/kernel/mempool_limits.h

src/common/system.h

src/crypto/sha3.h

src/util/threadinterrupt.cpp

src/node/protocol_version.h

src/util/exception.cpp

src/common/messages.h

src/node/connection_types.cpp

src/util/bip32.h

src/common/license_info.cpp

src/util/stdmutex.h

src/common/run_command.cpp

src/util/check.cpp

src/util/golombrice.h

src/node/types.h

src/node/timeoffsets.h

src/util/readwritefile.cpp

src/util/fastrange.h

src/util/signalinterrupt.h

src/util/task_runner.h

src/util/syserror.cpp

src/common/interfaces.cpp

src/common/types.h

src/util/threadinterrupt.h

src/kernel/chainstatemanager_opts.h

src/node/psbt.h

src/policy/ephemeral_policy.h

src/util/trace.h

src/common/url.cpp

src/kernel/mempool_options.h

src/util/serfloat.cpp

src/kernel/notifications_interface.h

src/node/timeoffsets.cpp

src/node/warnings.cpp

src/util/hash_type.h

src/crypto/hex_base.cpp

src/node/eviction.h

src/util/tokenbucket.h

src/crypto/aes.h

src/common/pcp.h

src/util/feefrac.cpp

src/node/transaction.h

src/util/threadnames.cpp

src/common/signmessage.h

src/util/exec.cpp

src/util/signalinterrupt.cpp

src/clientversion.cpp

src/common/signmessage.cpp

src/compat/assumptions.h

src/compat/byteswap.h

src/deploymentinfo.cpp

src/deploymentinfo.h

src/deploymentstatus.cpp

src/deploymentstatus.h

src/dummywallet.cpp

src/external_signer.h

src/init/bitcoin-gui.cpp

src/init/bitcoin-node.cpp

src/init/bitcoin-qt.cpp

src/init/bitcoin-wallet.cpp

src/init/bitcoind.cpp

src/init/common.h

src/interfaces/init.h

src/interfaces/ipc.h

src/key_io.h

src/logging/categories.h

src/logging/timer.h

src/mapport.h

src/musig.h

src/net_permissions.h

src/netgroup.h

src/netmessagemaker.h

src/node/chainstatemanager_args.cpp

src/node/connection_types.h

src/node/context.h

src/node/interface_ui.h

src/node/mempool_args.cpp

src/node/mining_args.cpp

src/node/minisketchwrapper.cpp

src/node/txreconciliation.h

src/policy/fees/estimator_args.cpp

src/policy/fees/estimator_args.h

src/policy/fees/estimator_man.cpp

src/policy/fees/estimator_man.h

src/policy/packages.h

src/policy/rbf.h

src/policy/truc_policy.h

src/pow.h

src/primitives/block.cpp

src/randomenv.h

src/rest.h

src/script/keyorigin.h

src/script/parsing.cpp

src/script/parsing.h

src/script/script_error.h

src/script/sigcache.cpp

src/script/sigcache.h

src/script/solver.h

src/script/verify_flags.h

src/semaphore_grant.h

src/signet.h

src/span.h

src/support/allocators/secure.h

src/support/allocators/zeroafterfree.h

src/util/tokenpipe.cpp

src/util/translation.h

src/util/vector.h

src/versionbits.h

src/versionbits_impl.h

src/wallet/external_signer_scriptpubkeyman.h

src/wallet/fees.h

src/wallet/load.h

src/wallet/receive.h

src/wallet/rpc/wallet.h

src/wallet/types.h

src/walletinitinterface.h

src/zmq/zmqabstractnotifier.cpp

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