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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| // ReadFrom attempts to decode a VerifyingKey from reader | ||
| // VerifyingKey must be encoded through WriteTo (compressed) or WriteRawTo (uncompressed) | ||
| // serialization format: | ||
| // https://github.com/zkcrypto/bellman/blob/fa9be45588227a8c6ec34957de3f68705f07bd92/src/groth16/mod.rs#L143 | ||
| // [α]1,[β]1,[β]2,[γ]2,[δ]1,[δ]2,uint32(len(Kvk)),[Kvk]1 | ||
| func (vk *VerifyingKey) ReadFrom(r io.Reader) (int64, error) { | ||
| n, err := vk.readFrom(r) | ||
| if err != nil { | ||
| return n, err | ||
| } | ||
| var m int64 | ||
| m, err = vk.CommitmentKey.ReadFrom(r) | ||
| return m + n, err | ||
| } | ||
|
|
||
| // UnsafeReadFrom has the same behavior as ReadFrom, except that it will not check that decode points | ||
| // are on the curve and in the correct subgroup. | ||
| func (vk *VerifyingKey) UnsafeReadFrom(r io.Reader) (int64, error) { | ||
| n, err := vk.readFrom(r, curve.NoSubgroupChecks()) | ||
| if err != nil { | ||
| return n, err | ||
| } | ||
| var m int64 | ||
| m, err = vk.CommitmentKey.UnsafeReadFrom(r) | ||
| return m + n, err | ||
| } | ||
|
|
||
| func (vk *VerifyingKey) readFrom(r io.Reader, decOptions ...func(*curve.Decoder)) (int64, error) { | ||
| dec := curve.NewDecoder(r, decOptions...) | ||
|
|
||
| // [α]1,[β]1,[β]2,[γ]2,[δ]1,[δ]2 | ||
| if err := dec.Decode(&vk.G1.Alpha); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| if err := dec.Decode(&vk.G1.Beta); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| if err := dec.Decode(&vk.G2.Beta); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| if err := dec.Decode(&vk.G2.Gamma); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| if err := dec.Decode(&vk.G1.Delta); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| if err := dec.Decode(&vk.G2.Delta); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
|
|
||
| // uint32(len(Kvk)),[Kvk]1 | ||
| if err := dec.Decode(&vk.G1.K); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| var publicCommitted [][]uint64 | ||
| if err := dec.Decode(&publicCommitted); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
| vk.PublicAndCommitmentCommitted = utils.Uint64SliceSliceToIntSliceSlice(publicCommitted) | ||
|
|
||
| // recompute vk.e (e(α, β)) and -[δ]2, -[γ]2 | ||
| if err := vk.Precompute(); err != nil { | ||
| return dec.BytesRead(), err | ||
| } | ||
|
|
||
| return dec.BytesRead(), nil | ||
| } |
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