Module: Tapyrus::Secp256k1::Native
- Extended by:
- Native
- Includes:
- FFI::Library
- Included in:
- Native
- Defined in:
- lib/tapyrus/secp256k1/native.rb
Overview
binding for secp256k1 (github.com/chaintope/tapyrus-core/tree/v0.4.0/src/secp256k1) tag: v0.4.0 this is not included by default, to enable set shared object path to ENV for linux, ENV = ‘/usr/local/lib/libsecp256k1.so’ for mac,
Constant Summary collapse
- SECP256K1_FLAGS_TYPE_MASK =
((1 << 8) - 1)
- SECP256K1_FLAGS_TYPE_CONTEXT =
(1 << 0)
- SECP256K1_FLAGS_TYPE_COMPRESSION =
(1 << 1)
- SECP256K1_FLAGS_BIT_CONTEXT_VERIFY =
(1 << 8)
- SECP256K1_FLAGS_BIT_CONTEXT_SIGN =
(1 << 9)
- SECP256K1_FLAGS_BIT_COMPRESSION =
(1 << 8)
- SECP256K1_CONTEXT_VERIFY =
Flags to pass to secp256k1_context_create.
(SECP256K1_FLAGS_TYPE_CONTEXT | SECP256K1_FLAGS_BIT_CONTEXT_VERIFY)
- SECP256K1_CONTEXT_SIGN =
(SECP256K1_FLAGS_TYPE_CONTEXT | SECP256K1_FLAGS_BIT_CONTEXT_SIGN)
- SECP256K1_EC_COMPRESSED =
Flag to pass to secp256k1_ec_pubkey_serialize and secp256k1_ec_privkey_export.
(SECP256K1_FLAGS_TYPE_COMPRESSION | SECP256K1_FLAGS_BIT_COMPRESSION)
- SECP256K1_EC_UNCOMPRESSED =
(SECP256K1_FLAGS_TYPE_COMPRESSION)
Class Method Summary collapse
-
.generate_key(compressed: true) ⇒ Object
generate tapyrus key object.
-
.generate_key_pair(compressed: true) ⇒ Object
generate ec private key and public key.
- .generate_pubkey(priv_key, compressed: true) ⇒ Object
- .init ⇒ Object
- .load_functions ⇒ Object
-
.parse_ec_pubkey?(pub_key, allow_hybrid = false) ⇒ Boolean
# validate whether this is a valid public key (more expensive than IsValid()).
-
.sign_data(data, privkey, extra_entropy, algo: :ecdsa) ⇒ String
sign data.
-
.verify_sig(data, sig, pub_key, algo: :ecdsa) ⇒ Object
verify signature.
- .with_context(flags: (SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN)) ⇒ Object
Class Method Details
.generate_key(compressed: true) ⇒ Object
generate tapyrus key object
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# File 'lib/tapyrus/secp256k1/native.rb', line 88 def generate_key(compressed: true) privkey, pubkey = generate_key_pair(compressed: compressed) Tapyrus::Key.new(priv_key: privkey, pubkey: pubkey, compressed: compressed) end |
.generate_key_pair(compressed: true) ⇒ Object
generate ec private key and public key
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# File 'lib/tapyrus/secp256k1/native.rb', line 73 def generate_key_pair(compressed: true) with_context do |context| ret, tries, max = 0, 0, 20 while ret != 1 raise "secp256k1_ec_seckey_verify in generate_key_pair failed." if tries >= max tries += 1 priv_key = FFI::MemoryPointer.new(:uchar, 32).put_bytes(0, SecureRandom.random_bytes(32)) ret = secp256k1_ec_seckey_verify(context, priv_key) end private_key = priv_key.read_string(32).bth [private_key, generate_pubkey_in_context(context, private_key, compressed: compressed)] end end |
.generate_pubkey(priv_key, compressed: true) ⇒ Object
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# File 'lib/tapyrus/secp256k1/native.rb', line 93 def generate_pubkey(priv_key, compressed: true) with_context { |context| generate_pubkey_in_context(context, priv_key, compressed: compressed) } end |
.init ⇒ Object
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# File 'lib/tapyrus/secp256k1/native.rb', line 33 def init raise "secp256k1 library dose not found." unless File.exist?(ENV["SECP256K1_LIB_PATH"]) ffi_lib(ENV["SECP256K1_LIB_PATH"]) load_functions end |
.load_functions ⇒ Object
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# File 'lib/tapyrus/secp256k1/native.rb', line 39 def load_functions attach_function(:secp256k1_context_create, [:uint], :pointer) attach_function(:secp256k1_context_destroy, [:pointer], :void) attach_function(:secp256k1_context_randomize, %i[pointer pointer], :int) attach_function(:secp256k1_ec_pubkey_create, %i[pointer pointer pointer], :int) attach_function(:secp256k1_ec_seckey_verify, %i[pointer pointer], :int) attach_function(:secp256k1_ecdsa_sign, %i[pointer pointer pointer pointer pointer pointer], :int) attach_function(:secp256k1_ec_pubkey_serialize, %i[pointer pointer pointer pointer uint], :int) attach_function(:secp256k1_ecdsa_signature_serialize_der, %i[pointer pointer pointer pointer], :int) attach_function(:secp256k1_ec_pubkey_parse, %i[pointer pointer pointer size_t], :int) attach_function(:secp256k1_ecdsa_signature_parse_der, %i[pointer pointer pointer size_t], :int) attach_function(:secp256k1_ecdsa_signature_normalize, %i[pointer pointer pointer], :int) attach_function(:secp256k1_ecdsa_verify, %i[pointer pointer pointer pointer], :int) attach_function(:secp256k1_schnorr_sign, %i[pointer pointer pointer pointer pointer pointer], :int) attach_function(:secp256k1_schnorr_verify, %i[pointer pointer pointer pointer], :int) end |
.parse_ec_pubkey?(pub_key, allow_hybrid = false) ⇒ Boolean
# validate whether this is a valid public key (more expensive than IsValid())
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# File 'lib/tapyrus/secp256k1/native.rb', line 132 def parse_ec_pubkey?(pub_key, allow_hybrid = false) pub_key = pub_key.htb return false if !allow_hybrid && ![0x02, 0x03, 0x04].include?(pub_key[0].ord) with_context do |context| pubkey = FFI::MemoryPointer.new(:uchar, pub_key.bytesize).put_bytes(0, pub_key) internal_pubkey = FFI::MemoryPointer.new(:uchar, 64) result = secp256k1_ec_pubkey_parse(context, internal_pubkey, pubkey, pub_key.bytesize) result == 1 end end |
.sign_data(data, privkey, extra_entropy, algo: :ecdsa) ⇒ String
sign data.
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# File 'lib/tapyrus/secp256k1/native.rb', line 102 def sign_data(data, privkey, extra_entropy, algo: :ecdsa) case algo when :ecdsa sign_ecdsa(data, privkey, extra_entropy) when :schnorr sign_schnorr(data, privkey) else nil end end |
.verify_sig(data, sig, pub_key, algo: :ecdsa) ⇒ Object
verify signature. @param data a data.
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# File 'lib/tapyrus/secp256k1/native.rb', line 117 def verify_sig(data, sig, pub_key, algo: :ecdsa) case algo when :ecdsa verify_ecdsa(data, sig, pub_key) when :schnorr verify_schnorr(data, sig, pub_key) else false end end |
.with_context(flags: (SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN)) ⇒ Object
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# File 'lib/tapyrus/secp256k1/native.rb', line 56 def with_context(flags: (SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN)) init begin context = secp256k1_context_create(flags) ret, tries, max = 0, 0, 20 while ret != 1 raise "secp256k1_context_randomize failed." if tries >= max tries += 1 ret = secp256k1_context_randomize(context, FFI::MemoryPointer.from_string(SecureRandom.random_bytes(32))) end yield(context) if block_given? ensure secp256k1_context_destroy(context) end end |