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29 lines
916 B
29 lines
916 B
import binascii
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import nacl.bindings
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edwards_add = nacl.bindings.crypto_core_ed25519_add
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inv = nacl.bindings.crypto_core_ed25519_scalar_invert
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scalar_add = nacl.bindings.crypto_core_ed25519_scalar_add
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scalarmult_B = nacl.bindings.crypto_scalarmult_ed25519_base_noclamp
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scalarmult = nacl.bindings.crypto_scalarmult_ed25519_noclamp
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# https://github.com/monero-project/monero/blob/9f814edbd78c70c70b814ca934c1ddef58768262/src/ringct/rctTypes.h#L615
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H = binascii.unhexlify(
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"8b655970153799af2aeadc9ff1add0ea6c7251d54154cfa92c173a0dd39c1f94"
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)
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def scalarmult_H(v):
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return scalarmult(v, H)
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def scalar_reduce(v):
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return nacl.bindings.crypto_core_ed25519_scalar_reduce(v + (64 - len(v)) * b"\0")
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def public_from_secret_hex(hk):
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try:
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return binascii.hexlify(scalarmult_B(binascii.unhexlify(hk))).decode()
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except nacl.exceptions.RuntimeError:
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raise ValueError("Invalid secret key")
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