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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,102 +1,53 @@ | ||
| package model | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| c "github.com/hyperledger-labs/jsonld-vc-bbs-go/constants" | ||
| ) | ||
|
|
||
| // CredentialProof The JSON-LD Proof. | ||
| type CredentialProof struct { | ||
| Context []string `json:"@context,omitempty"` | ||
| Type string `json:"type"` | ||
| Created string `json:"created"` | ||
| ProofPurpose string `json:"proofPurpose"` | ||
| VerificationMethod string `json:"verificationMethod"` | ||
| Nonce string `json:"nonce,omitempty"` | ||
| ProofValue string `json:"proofValue,omitempty"` | ||
| } | ||
| // JsonLdProof The JSON-LD Proof. | ||
| type JsonLdProof = map[string]interface{} | ||
|
|
||
| // CredentialProofFromMap Convert a map to a proper CredentialProof. | ||
| // AddContextToJsonLdProof Add the default context to the JSON-LD proof, if none is provided. | ||
| // | ||
| // proof JsonLDProof The proof as map. | ||
| // compact bool If true, compact the returned proof removing the '@context' field. | ||
| // | ||
| // returns: | ||
| // | ||
| // credentialProof *CredentialProof | ||
| // err error | ||
| func CredentialProofFromMap(proof JsonLdProof, compact bool) (*CredentialProof, error) { | ||
| now := time.Now().UTC().Format(c.ProofTimestampFormat) | ||
|
|
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| defaultProof := &CredentialProof{ | ||
| Created: now, | ||
| Type: c.CredentialProofTypeBbsBlsSig2020, | ||
| ProofPurpose: c.CredentialProofPurpose, | ||
| } | ||
|
|
||
| if val, ok := proof[c.CredentialFieldCreated]; ok { | ||
| defaultProof.Created = val.(string) | ||
| } | ||
|
|
||
| if val, ok := proof[c.CredentialFieldType]; ok { | ||
| defaultProof.Type = val.(string) | ||
| } | ||
|
|
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| if val, ok := proof[c.CredentialFieldProofPurpose]; ok { | ||
| defaultProof.ProofPurpose = val.(string) | ||
| } | ||
|
|
||
| if !compact { | ||
| // add context only if the proof does not need to be compact | ||
| if val, ok := proof[c.CredentialFieldContext]; ok && !compact { | ||
| defaultProof.Context = val.([]string) | ||
| } else { | ||
| defaultProof.Context = []string{ | ||
| c.ContextCredentialV1, | ||
| c.ContextSecurityBbsV1, | ||
| } | ||
| func AddContextToJsonLdProof(proof JsonLdProof) { | ||
| // add proof context if it is compacted | ||
| if proof[c.CredentialFieldContext] == nil { | ||
| proof[c.CredentialFieldContext] = []string{ | ||
| c.ContextCredentialV1, | ||
| c.ContextSecurityBbsV1, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if val, ok := proof[c.CredentialFieldNonce]; ok { | ||
| defaultProof.Nonce = val.(string) | ||
| } | ||
|
|
||
| if val, ok := proof[c.CredentialFieldVerificationMethod]; ok { | ||
| defaultProof.VerificationMethod = val.(string) | ||
| } else { | ||
| return nil, fmt.Errorf("verification method is required") | ||
| } | ||
|
|
||
| if val, ok := proof[c.CredentialFieldProofValue]; ok { | ||
| defaultProof.ProofValue = val.(string) | ||
| } | ||
|
|
||
| return defaultProof, nil | ||
| // DeleteContextFromJsonLdProof Delete the '@context' field frmo the JSON-LD Proof. | ||
| // | ||
| // proof JsonLDProof The proof as map. | ||
| func DeleteContextFromJsonLdProof(proof JsonLdProof) { | ||
| delete(proof, c.CredentialFieldContext) | ||
| } | ||
|
|
||
| // CredentialProofToMap Convert a CredentialProof to a map. | ||
| // CreateDefaultJsonLDProof Create a default JSON-LD Proof object. | ||
| // | ||
| // proof *CredentialProof The proof to convert. | ||
| // verificationMethod string The verification method to embed in the proof. | ||
| // compact bool If true, skip the addition of the '@context' in the proof object. | ||
| // | ||
| // returns: | ||
| // | ||
| // proofMap JsonLDProof | ||
| // err error | ||
| func CredentialProofToMap(proof *CredentialProof) (JsonLdProof, error) { | ||
| var proofMap JsonLdProof | ||
| proofBytes, err := json.Marshal(proof) | ||
| if err != nil { | ||
| return nil, err | ||
| // proof JsonLdProof The JSON-LD proof. | ||
| func CreateDefaultJsonLDProof(verificationMethod string, compact bool) JsonLdProof { | ||
| defaultProof := JsonLdProof{ | ||
| c.CredentialFieldCreated: time.Now().UTC().Format(c.ProofTimestampFormat), | ||
| c.CredentialFieldVerificationMethod: verificationMethod, | ||
| c.CredentialFieldType: c.CredentialProofTypeBbsBlsSig2020, | ||
| c.CredentialFieldProofPurpose: c.CredentialProofPurpose, | ||
| } | ||
|
|
||
| err = json.Unmarshal(proofBytes, &proofMap) | ||
| if err != nil { | ||
| return nil, err | ||
| if !compact { | ||
| AddContextToJsonLdProof(defaultProof) | ||
| } | ||
|
|
||
| return proofMap, nil | ||
| return defaultProof | ||
| } |