|
Chilkat • HOME • .NET Core C# • Android™ • AutoIt • C • C# • C++ • Chilkat2-Python • CkPython • Classic ASP • DataFlex • Delphi ActiveX • Delphi DLL • Go • Java • Lianja • Mono C# • Node.js • Objective-C • PHP ActiveX • PHP Extension • Perl • PowerBuilder • PowerShell • PureBasic • Ruby • SQL Server • Swift 2 • Swift 3,4,5... • Tcl • Unicode C • Unicode C++ • VB.NET • VBScript • Visual Basic 6.0 • Visual FoxPro • Xojo Plugin
(PureBasic) Validate JWS with Multiple Signatures using the General JSON Serialization FormatValidates and recovers data and headers from a JSON Web Signature (JWS) containing 3 signatures. Note: Chilkat supports all of the following JWS algorithms: +--------------+-------------------------------+--------------------+ | "alg" Param | Digital Signature or MAC | Implementation | | Value | Algorithm | Requirements | +--------------+-------------------------------+--------------------+ | HS256 | HMAC using SHA-256 | Required | | HS384 | HMAC using SHA-384 | Optional | | HS512 | HMAC using SHA-512 | Optional | | RS256 | RSASSA-PKCS1-v1_5 using | Recommended | | | SHA-256 | | | RS384 | RSASSA-PKCS1-v1_5 using | Optional | | | SHA-384 | | | RS512 | RSASSA-PKCS1-v1_5 using | Optional | | | SHA-512 | | | ES256 | ECDSA using P-256 and SHA-256 | Recommended+ | | ES384 | ECDSA using P-384 and SHA-384 | Optional | | ES512 | ECDSA using P-521 and SHA-512 | Optional | | PS256 | RSASSA-PSS using SHA-256 and | Optional | | | MGF1 with SHA-256 | | | PS384 | RSASSA-PSS using SHA-384 and | Optional | | | MGF1 with SHA-384 | | | PS512 | RSASSA-PSS using SHA-512 and | Optional | | | MGF1 with SHA-512 | | +--------------+-------------------------------+--------------------+ Note: This example requires Chilkat v9.5.0.66 or greater.
IncludeFile "CkJws.pb" IncludeFile "CkStringBuilder.pb" IncludeFile "CkJsonObject.pb" IncludeFile "CkPublicKey.pb" Procedure ChilkatExample() ; This requires the Chilkat API to have been previously unlocked. ; See Global Unlock Sample for sample code. ; Note: This example requires Chilkat v9.5.0.66 or greater. ; First, prepare the public keys that will be needed for each signature. ; --------------------------------------------------- ; Use the following RSA key loaded from JWK format. sbRsaJwk.i = CkStringBuilder::ckCreate() If sbRsaJwk.i = 0 Debug "Failed to create object." ProcedureReturn EndIf CkStringBuilder::ckAppend(sbRsaJwk,"{" + Chr(34) + "kty" + Chr(34) + ":" + Chr(34) + "RSA" + Chr(34) + ",") CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "n" + Chr(34) + ":" + Chr(34) + "ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx") CkStringBuilder::ckAppend(sbRsaJwk,"HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs") CkStringBuilder::ckAppend(sbRsaJwk,"D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH") CkStringBuilder::ckAppend(sbRsaJwk,"SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV") CkStringBuilder::ckAppend(sbRsaJwk,"MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8") CkStringBuilder::ckAppend(sbRsaJwk,"NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ" + Chr(34) + ",") CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "e" + Chr(34) + ":" + Chr(34) + "AQAB" + Chr(34)) CkStringBuilder::ckAppend(sbRsaJwk,"}") rsaKey.i = CkPublicKey::ckCreate() If rsaKey.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success.i = CkPublicKey::ckLoadFromString(rsaKey,CkStringBuilder::ckGetAsString(sbRsaJwk)) If success <> 1 Debug CkPublicKey::ckLastErrorText(rsaKey) CkStringBuilder::ckDispose(sbRsaJwk) CkPublicKey::ckDispose(rsaKey) ProcedureReturn EndIf ; --------------------------------------------------- ; Use the following ECC public key loaded from JWK format. sbEccJwk.i = CkStringBuilder::ckCreate() If sbEccJwk.i = 0 Debug "Failed to create object." ProcedureReturn EndIf CkStringBuilder::ckAppend(sbEccJwk,"{" + Chr(34) + "kty" + Chr(34) + ":" + Chr(34) + "EC" + Chr(34) + ",") CkStringBuilder::ckAppend(sbEccJwk,Chr(34) + "crv" + Chr(34) + ":" + Chr(34) + "P-256" + Chr(34) + ",") CkStringBuilder::ckAppend(sbEccJwk,Chr(34) + "x" + Chr(34) + ":" + Chr(34) + "f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU" + Chr(34) + ",") CkStringBuilder::ckAppend(sbEccJwk,Chr(34) + "y" + Chr(34) + ":" + Chr(34) + "x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0" + Chr(34)) CkStringBuilder::ckAppend(sbEccJwk,"}") eccKey.i = CkPublicKey::ckCreate() If eccKey.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkPublicKey::ckLoadFromString(eccKey,CkStringBuilder::ckGetAsString(sbEccJwk)) If success <> 1 Debug CkPublicKey::ckLastErrorText(eccKey) CkStringBuilder::ckDispose(sbRsaJwk) CkPublicKey::ckDispose(rsaKey) CkStringBuilder::ckDispose(sbEccJwk) CkPublicKey::ckDispose(eccKey) ProcedureReturn EndIf ; --------------------------------------------------- ; The HMAC key (in base64url format) hmacKey.s = "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow" ; The code below will verify each of the signatures in this JWS: ; { ; "payload": "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu", ; "signatures": [ ; { ; "protected": "eyJhbGciOiJSUzI1NiIsImtpZCI6Im15UnNhS2V5In0", ; "signature": "IPMQ02niTQDwLzsRZSCaEm9VEyAX_AVe3HWjniNt9kW-a8d6ZVbd2k6jGae8s1yIh0cgxDnXQ6-p6_sBI0cnMO0xpuJANhh2vFtNJl5lisad94-H3mB3lSfafRqxeYp5D8bh39BPv7y3PrUNVMQdKEJp_D5oJ0ROPTIYx3EG8eJQOx1HO0KqhcUo401XR6KSsIyFm5joBLNKTVzxZUTT1RRZZtwTdeZkbGevugIOX_9gHAtARpV6WaFA4Vvjnq8X9wPgqjWNCQRupadhTPz0JAsa-wy5vXQjsFlXAn43mDPpMfna5Ab3F5pS4yDwkbX6nRn7XBxH1SnnNJRFholQZw" ; }, ; { ; "protected": "eyJhbGciOiJFUzI1NiIsImtpZCI6Im15RWNLZXkifQ", ; "signature": "1OQtaT3pgZmkDxvlfghvxL_8kX16WIen6u1MadEq1pA4qytA0--_EwZDNk00GDPWFpoJtKznibMZzLOg_UhHIw" ; }, ; { ; "protected": "eyJhbGciOiJIUzI1NiIsImtpZCI6Im15TWFjS2V5In0", ; "signature": "YY8yVjmJJfy7YJOn3uUydG8WCY2PEuCvOLil5Ks5lnw" ; } ; ] ; } sbJws.i = CkStringBuilder::ckCreate() If sbJws.i = 0 Debug "Failed to create object." ProcedureReturn EndIf CkStringBuilder::ckAppend(sbJws,"{ ") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "payload" + Chr(34) + ": " + Chr(34) + "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu" + Chr(34) + ",") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "signatures" + Chr(34) + ": [") CkStringBuilder::ckAppend(sbJws," { ") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "protected" + Chr(34) + ": " + Chr(34) + "eyJhbGciOiJSUzI1NiIsImtpZCI6Im15UnNhS2V5In0" + Chr(34) + ",") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "signature" + Chr(34) + ": " + Chr(34) + "IPMQ02niTQDwLzsRZSCaEm9VEyAX_AVe3HWjniNt9kW-a8d6ZVbd2k6jGae8s1yIh0cgxDnXQ6-p6_sBI0cnMO0xpuJANhh2vFtNJl5lisad94-H3mB3lSfafRqxeYp5D8bh39BPv7y3PrUNVMQdKEJp_D5oJ0ROPTIYx3EG8eJQOx1HO0KqhcUo401XR6KSsIyFm5joBLNKTVzxZUTT1RRZZtwTdeZkbGevugIOX_9gHAtARpV6WaFA4Vvjnq8X9wPgqjWNCQRupadhTPz0JAsa-wy5vXQjsFlXAn43mDPpMfna5Ab3F5pS4yDwkbX6nRn7XBxH1SnnNJRFholQZw" + Chr(34)) CkStringBuilder::ckAppend(sbJws," },") CkStringBuilder::ckAppend(sbJws," { ") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "protected" + Chr(34) + ": " + Chr(34) + "eyJhbGciOiJFUzI1NiIsImtpZCI6Im15RWNLZXkifQ" + Chr(34) + ",") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "signature" + Chr(34) + ": " + Chr(34) + "1OQtaT3pgZmkDxvlfghvxL_8kX16WIen6u1MadEq1pA4qytA0--_EwZDNk00GDPWFpoJtKznibMZzLOg_UhHIw" + Chr(34)) CkStringBuilder::ckAppend(sbJws," },") CkStringBuilder::ckAppend(sbJws," { ") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "protected" + Chr(34) + ": " + Chr(34) + "eyJhbGciOiJIUzI1NiIsImtpZCI6Im15TWFjS2V5In0" + Chr(34) + ",") CkStringBuilder::ckAppend(sbJws," " + Chr(34) + "signature" + Chr(34) + ": " + Chr(34) + "YY8yVjmJJfy7YJOn3uUydG8WCY2PEuCvOLil5Ks5lnw" + Chr(34)) CkStringBuilder::ckAppend(sbJws," }") CkStringBuilder::ckAppend(sbJws," ]") CkStringBuilder::ckAppend(sbJws,"}") jws.i = CkJws::ckCreate() If jws.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkJws::ckLoadJwsSb(jws,sbJws) If success <> 1 Debug CkJws::ckLastErrorText(jws) CkStringBuilder::ckDispose(sbRsaJwk) CkPublicKey::ckDispose(rsaKey) CkStringBuilder::ckDispose(sbEccJwk) CkPublicKey::ckDispose(eccKey) CkStringBuilder::ckDispose(sbJws) CkJws::ckDispose(jws) ProcedureReturn EndIf ; The payload is easily accessible: Debug "Payload: " + CkJws::ckGetPayload(jws,"utf-8") protHeader.i sbKeyId.i = CkStringBuilder::ckCreate() If sbKeyId.i = 0 Debug "Failed to create object." ProcedureReturn EndIf bCaseSensitive.i = 0 numSignatures.i = CkJws::ckNumSignatures(jws) i.i = 0 While i < numSignatures protHeader = CkJws::ckGetProtectedHeader(jws,i) Debug "--------------------------" Debug Str(i) + ": " ; Get the protected header. CkJsonObject::setCkEmitCompact(protHeader, 0) Debug CkJsonObject::ckEmit(protHeader) ; Get the key ID ("kid") member. ; Note: In this example, the "kid" values are contained in the protected headers. ; They could've just as easily been located in unprotected headers. In that case, ; we would've called GetUnprotectedHeader(i) instead of GetProtectedHeader(i). CkStringBuilder::ckClear(sbKeyId) CkStringBuilder::ckAppend(sbKeyId,CkJsonObject::ckStringOf(protHeader,"kid")) ; Set the key based on key ID. If CkStringBuilder::ckContentsEqual(sbKeyId,"myRsaKey",bCaseSensitive) = 1 CkJws::ckSetPublicKey(jws,i,rsaKey) EndIf If CkStringBuilder::ckContentsEqual(sbKeyId,"myEcKey",bCaseSensitive) = 1 CkJws::ckSetPublicKey(jws,i,eccKey) EndIf If CkStringBuilder::ckContentsEqual(sbKeyId,"myMacKey",bCaseSensitive) = 1 CkJws::ckSetMacKey(jws,i,hmacKey,"base64url") EndIf ; Validate this signature. v.i = CkJws::ckValidate(jws,i) If v < 0 ; Perhaps Chilkat was not unlocked or the trial expired.. Debug "Validate failed for some other reason." Debug CkJws::ckLastErrorText(jws) Else If v = 0 Debug "Invalid signature. The key was incorrect, the JWS was invalid, or both." Else Debug "Signature validated." EndIf EndIf CkJsonObject::ckDispose(protHeader) i = i + 1 Wend ; The output of this program is: ; Payload: In our village, folks say God crumbles up the old moon into stars. ; -------------------------- ; 0: ; { ; "alg": "RS256", ; "kid": "myRsaKey" ; } ; ; Signature validated. ; -------------------------- ; 1: ; { ; "alg": "ES256", ; "kid": "myEcKey" ; } ; ; Signature validated. ; -------------------------- ; 2: ; { ; "alg": "HS256", ; "kid": "myMacKey" ; } ; ; Signature validated. CkStringBuilder::ckDispose(sbRsaJwk) CkPublicKey::ckDispose(rsaKey) CkStringBuilder::ckDispose(sbEccJwk) CkPublicKey::ckDispose(eccKey) CkStringBuilder::ckDispose(sbJws) CkJws::ckDispose(jws) CkStringBuilder::ckDispose(sbKeyId) ProcedureReturn EndProcedure |
||||
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.