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Documentation
¶
Overview ¶
Package hash provides an interface that hash functions (as gadget) should implement.
Index ¶
Constants ¶
This section is empty.
Variables ¶
var BuilderRegistry = make(map[string]func(api frontend.API) (FieldHasher, error))
Functions ¶
This section is empty.
Types ¶
type BinaryFixedLengthHasher ¶ added in v0.9.0
type BinaryFixedLengthHasher interface {
BinaryHasher
// FixedLengthSum returns digest of the first length bytes.
FixedLengthSum(length frontend.Variable) []uints.U8
}
BinaryFixedLengthHasher is like BinaryHasher, but assumes the length of the input is not full length as defined during compile time. This allows to compute digest of variable-length input, unlike BinaryHasher which assumes the length of the input is the total number of bytes written.
type BinaryHasher ¶ added in v0.9.0
type BinaryHasher interface {
// Sum finalises the current hash and returns the digest.
Sum() []uints.U8
// Write writes more bytes into the current hash state.
Write([]uints.U8)
// Size returns the number of bytes this hash function returns in a call to
// [BinaryHasher.Sum].
Size() int
}
BinaryHasher hashes inputs into a short digest. It takes as inputs bytes and outputs byte array whose length depends on the underlying hash function. For SNARK-native hash functions use FieldHasher.
type FieldHasher ¶ added in v0.9.0
type FieldHasher interface {
// Sum computes the hash of the internal state of the hash function.
Sum() frontend.Variable
// Write populate the internal state of the hash function with data. The inputs are native field elements.
Write(data ...frontend.Variable)
// Reset empty the internal state and put the intermediate state to zero.
Reset()
}
FieldHasher hashes inputs into a short digest. This interface mocks BinaryHasher, but is more suitable in-circuit by assuming the inputs are scalar field elements and outputs digest as a field element. Such hash functions are for examle Poseidon, MiMC etc.
Source Files
Directories
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| Path | Synopsis |
|---|---|
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Package mimc provides a ZKP-circuit function to compute a MiMC hash.
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Package mimc provides a ZKP-circuit function to compute a MiMC hash. |
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Package sha2 implements SHA2 hash computation.
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Package sha2 implements SHA2 hash computation. |
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Package sha3 provides ZKP circuits for SHA3 hash algorithms applying sponge construction over Keccak f-[1600] permutation function.
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Package sha3 provides ZKP circuits for SHA3 hash algorithms applying sponge construction over Keccak f-[1600] permutation function. |