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chore: add afgo-ext vc status component.
Signed-off-by: Volodymyr Kubiv <volodymyr.kubiv@euristiq.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| /* | ||
| Copyright Avast Software. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| // Package api contains dependency-injection interfaces for Credential Status validation clients. | ||
| package api | ||
|
|
||
| import ( | ||
| "github.com/trustbloc/vc-go/verifiable" | ||
| ) | ||
|
|
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| // Validator holds handlers for validating a particular format of Status(Revocation) List VC. | ||
| type Validator interface { | ||
| ValidateStatus(vcStatus *verifiable.TypedID) error | ||
| GetStatusVCURI(vcStatus *verifiable.TypedID) (string, error) | ||
| GetStatusListIndex(vcStatus *verifiable.TypedID) (int, error) | ||
| } | ||
|
|
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| // ValidatorGetter provides the matching Validator for a given credential status type. | ||
| type ValidatorGetter func(statusType string) (Validator, error) | ||
|
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| // StatusListVCURIResolver resolves a VC StatusList Credential. | ||
| type StatusListVCURIResolver interface { | ||
| Resolve(statusListVCURL string) (*verifiable.Credential, error) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| Copyright Avast Software. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
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| // Package bitstring provides functions for operating on byte slices as if they are 0-indexed arrays of bits, | ||
| // packed 8 bits to a byte, LSB-first. | ||
| package bitstring | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "compress/gzip" | ||
| "encoding/base64" | ||
| "fmt" | ||
| ) | ||
|
|
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| const ( | ||
| bitsPerByte = 8 | ||
| one = 0x1 | ||
| ) | ||
|
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| // Decode decodes a compressed bitstring from a base64URL-encoded string. | ||
| func Decode(src string) ([]byte, error) { | ||
| decodedBits, err := base64.RawURLEncoding.DecodeString(src) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| b := bytes.NewReader(decodedBits) | ||
|
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| zipReader, err := gzip.NewReader(b) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| buf := new(bytes.Buffer) | ||
| if _, err := buf.ReadFrom(zipReader); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return buf.Bytes(), nil | ||
| } | ||
|
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| // BitAt returns the bit in the idx'th position (zero-indexed) in the given bitstring. | ||
| func BitAt(bitString []byte, idx int) (bool, error) { | ||
| nByte := idx / bitsPerByte | ||
| nBit := idx % bitsPerByte | ||
|
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| if idx < 0 || nByte >= len(bitString) { | ||
| return false, fmt.Errorf("position is invalid") | ||
| } | ||
|
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| bitValue := (bitString[nByte] & (one << nBit)) != 0 | ||
|
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| return bitValue, nil | ||
| } | ||
|
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| // Encode gzips a bitstring and encodes it as a raw urlsafe base-64 string. | ||
| func Encode(bitString []byte) (string, error) { | ||
| var buf bytes.Buffer | ||
|
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| w := gzip.NewWriter(&buf) | ||
| if _, err := w.Write(bitString); err != nil { | ||
| return "", err | ||
| } | ||
|
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| if err := w.Close(); err != nil { | ||
| return "", err | ||
| } | ||
|
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| return base64.RawURLEncoding.EncodeToString(buf.Bytes()), nil | ||
| } |
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