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@wistefan
wistefan committed Dec 1, 2023
1 parent affbc66 commit e635fcc
Showing 1 changed file with 149 additions and 8 deletions.
157 changes: 149 additions & 8 deletions tir/tokenProvider.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,8 @@ import (
"errors"
"net/http"
"os"
"regexp"
"strings"

common "github.com/fiware/VCVerifier/common"
configModel "github.com/fiware/VCVerifier/config"
Expand All @@ -22,6 +24,7 @@ import (
"github.com/hyperledger/aries-framework-go/pkg/doc/jose/jwk"
"github.com/hyperledger/aries-framework-go/pkg/doc/signature/suite/ed25519signature2018"
"github.com/hyperledger/aries-framework-go/pkg/doc/verifiable"
"github.com/hyperledger/aries-framework-go/pkg/framework/aries"
vdrapi "github.com/hyperledger/aries-framework-go/pkg/framework/aries/api/vdr"
"github.com/hyperledger/aries-framework-go/pkg/vdr/web"
ld "github.com/piprate/json-gold/ld"
Expand All @@ -38,6 +41,64 @@ var ErrorTokenProviderNoVerificationMethod = errors.New("no_verification_method_
var ErrorBadPrivateKey = errors.New("bad_private_key_length")
var ErrorTokenProviderNoDid = errors.New("no_did_configured")

const (
wso = "[ \\t]*"
iri = "(?:<([^:]+:[^>]*)>)"

// https://www.w3.org/TR/turtle/#grammar-production-BLANK_NODE_LABEL

pnCharsBase = "A-Z" + "a-z" +
"\u00C0-\u00D6" +
"\u00D8-\u00F6" +
"\u00F8-\u02FF" +
"\u0370-\u037D" +
"\u037F-\u1FFF" +
"\u200C-\u200D" +
"\u2070-\u218F" +
"\u2C00-\u2FEF" +
"\u3001-\uD7FF" +
"\uF900-\uFDCF" +
"\uFDF0-\uFFFD"
// TODO:
//"\u10000-\uEFFFF"

pnCharsU = pnCharsBase + "_"

pnChars = pnCharsU +
"0-9" +
"-" +
"\u00B7" +
"\u0300-\u036F" +
"\u203F-\u2040"

blankNodeLabel = "(_:" +
"(?:[" + pnCharsU + "0-9])" +
"(?:(?:[" + pnChars + ".])*(?:[" + pnChars + "]))?" +
")"

// '(_:' +
// '(?:[' + PN_CHARS_U + '0-9])' +
// '(?:(?:[' + PN_CHARS + '.])*(?:[' + PN_CHARS + ']))?' +
// ')';

bnode = blankNodeLabel

plain = "\"([^\"\\\\]*(?:\\\\.[^\"\\\\]*)*)\""
datatype = "(?:\\^\\^" + iri + ")"
language = "(?:@([a-z]+(?:-[a-zA-Z0-9]+)*))"
literal = "(?:" + plain + "(?:" + datatype + "|" + language + ")?)"
ws = "[ \\t]+"

subject = "(?:" + iri + "|" + bnode + ")" + ws
property = iri + ws
object = "(?:" + iri + "|" + bnode + "|" + literal + ")" + wso
graph = "(?:\\.|(?:(?:" + iri + "|" + bnode + ")" + wso + "\\.))"
)

// full quad regex

var regexQuad = regexp.MustCompile("^" + wso + subject + property + object + graph + wso + "$")

type TokenProvider interface {
GetToken(vc *verifiable.Credential, audience string) (string, error)
GetAuthCredential() (vc *verifiable.Credential, err error)
Expand Down Expand Up @@ -153,14 +214,53 @@ func (tp M2MTokenProvider) signVerifiablePresentation(authCredential *verifiable
vp.ID = "urn:uuid:" + uuid.NewString()
vp.Holder = tp.did

proc := ld.NewJsonLdProcessor()
options := ld.NewJsonLdOptions("")
options.Format = "application/n-quads"
options.Algorithm = "URDNA2015"
normalized, err := proc.Normalize(vp, options)
if err != nil {
logging.Log().Warnf("Normalize error: %v", err)
return vp, err
}
result, ok := normalized.(string)
if !ok {
logging.Log().Warn("Invalid view")
return vp, err
}
logging.Log().Infof("%s", result)
views := strings.Split(result, "\n")
valid := true
for _, v := range views {
_, err := ld.ParseNQuads(v)
if err != nil {
logging.Log().Warnf("++++++++++++++++++++++++++++++++++ERROR PARSING +++++++++ %v", err)
logging.Log().Warnf("Was %v", v)
valid = false
continue
} else {
logging.Log().Warnf("V %v is valid.", v)
}

}
logging.Log().Warnf("++++++++++++ The QUAD %s", regexQuad.String())

if valid {

logging.Log().Warnf("ALL VIEWS ARE VALID.")
} else {
logging.Log().Warnf("SOMETHING IS FISHY.")

}

created := tp.clock.Now()
err = vp.AddLinkedDataProof(&verifiable.LinkedDataProofContext{
Created: &created,
SignatureType: "Ed25519Signature2018",
Suite: ed25519signature2018.New(suite.WithSigner(tp.signer)),
SignatureRepresentation: verifiable.SignatureJWS,
VerificationMethod: tp.verificationMethod,
}, ldprocessor.WithRemoveAllInvalidRDF(), ldprocessor.WithDocumentLoader(ld.NewDefaultDocumentLoader(http.DefaultClient)))
}, ldprocessor.WithDocumentLoader(ld.NewDefaultDocumentLoader(http.DefaultClient)))

if err != nil {
logging.Log().Warnf("Was not able to add an ld-proof. Err: %v", err)
Expand Down Expand Up @@ -196,26 +296,67 @@ func getCredential(vcPath string) (vc *verifiable.Credential, err error) {
return vc, err
}
// create the framework
//framework, err := aries.New()
framework, err := aries.New()
if err != nil {
logging.Log().Warnf("Was not able to initiate aries. Err: %v", err)
return vc, err
}
// get the context
//ctx, err := framework.Context()
ctx, err := framework.Context()

if err != nil {
logging.Log().Warnf("Was unable to retrieve the framework context. Err: %v", err)
return vc, err
}

//didWeb := webResolver{vdr: *web.New()}
didWeb := webResolver{vdr: *web.New()}

defaultResolver := verifiable.NewVDRKeyResolver(ctx.VDRegistry())
webResolver := verifiable.NewVDRKeyResolver(didWeb)

var ic map[string]interface{}
json.Unmarshal(vcBytes, &ic)

proc := ld.NewJsonLdProcessor()
options := ld.NewJsonLdOptions("")
options.Format = "application/n-quads"
options.Algorithm = "URDNA2015"
normalized, err := proc.Normalize(ic, options)
if err != nil {
logging.Log().Warnf("Normalize error: %v", err)
return vc, err
}
result, ok := normalized.(string)
if !ok {
logging.Log().Warn("Invalid view")
return vc, err
}
logging.Log().Infof("%s", result)
views := strings.Split(result, "\n")
valid := true
for _, v := range views {
_, err := ld.ParseNQuads(v)
if err != nil {
logging.Log().Warnf("++++++++++++++++++++++++++++++++++ERROR PARSING +++++++++ %v", err)
logging.Log().Warnf("Was %v", v)
valid = false
continue
} else {
logging.Log().Warnf("V %v is valid.", v)
}

}
logging.Log().Warnf("++++++++++++ The QUAD %s", regexQuad.String())

//defaultResolver := verifiable.NewVDRKeyResolver(ctx.VDRegistry())
//webResolver := verifiable.NewVDRKeyResolver(didWeb)
if valid {

logging.Log().Warnf("ALL VIEWS ARE VALID.")
} else {
logging.Log().Warnf("SOMETHING IS FISHY.")

}

return verifiable.ParseCredential(vcBytes, verifiable.WithDisabledProofCheck(), verifiable.WithCredDisableValidation())
//, verifiable.WithJSONLDDocumentLoader(ld.NewDefaultDocumentLoader(&http.Client{})), verifiable.WithPublicKeyFetcher(defaultResolver.PublicKeyFetcher()), verifiable.WithPublicKeyFetcher(webResolver.PublicKeyFetcher()))
return verifiable.ParseCredential(vcBytes, verifiable.WithJSONLDDocumentLoader(ld.NewDefaultDocumentLoader(&http.Client{})), verifiable.WithPublicKeyFetcher(defaultResolver.PublicKeyFetcher()), verifiable.WithPublicKeyFetcher(webResolver.PublicKeyFetcher()))
}

type webResolver struct {
Expand Down

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