PowerBuilder
PowerBuilder
Validate JWS with Multiple Signatures using the General JSON Serialization Format
See more JSON Web Signatures (JWS) Examples
Validates 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 | | +--------------+-------------------------------+--------------------+
Chilkat PowerBuilder Downloads
integer li_rc
integer li_Success
oleobject loo_SbRsaJwk
oleobject loo_RsaKey
oleobject loo_SbEccJwk
oleobject loo_EccKey
string ls_HmacKey
oleobject loo_SbJws
oleobject loo_Jws
oleobject loo_SbKeyId
integer li_BCaseSensitive
oleobject loo_ProtHeader
integer li_NumSignatures
integer i
integer v
li_Success = 0
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// First, prepare the public keys that will be needed for each signature.
// ---------------------------------------------------
// Use the following RSA key loaded from JWK format.
loo_SbRsaJwk = create oleobject
li_rc = loo_SbRsaJwk.ConnectToNewObject("Chilkat.StringBuilder")
if li_rc < 0 then
destroy loo_SbRsaJwk
MessageBox("Error","Connecting to COM object failed")
return
end if
loo_SbRsaJwk.Append("{~"kty~":~"RSA~",")
loo_SbRsaJwk.Append("~"n~":~"ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx")
loo_SbRsaJwk.Append("HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs")
loo_SbRsaJwk.Append("D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH")
loo_SbRsaJwk.Append("SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV")
loo_SbRsaJwk.Append("MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8")
loo_SbRsaJwk.Append("NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ~",")
loo_SbRsaJwk.Append("~"e~":~"AQAB~"")
loo_SbRsaJwk.Append("}")
loo_RsaKey = create oleobject
li_rc = loo_RsaKey.ConnectToNewObject("Chilkat.PublicKey")
li_Success = loo_RsaKey.LoadFromString(loo_SbRsaJwk.GetAsString())
if li_Success = 0 then
Write-Debug loo_RsaKey.LastErrorText
destroy loo_SbRsaJwk
destroy loo_RsaKey
return
end if
// ---------------------------------------------------
// Use the following ECC public key loaded from JWK format.
loo_SbEccJwk = create oleobject
li_rc = loo_SbEccJwk.ConnectToNewObject("Chilkat.StringBuilder")
loo_SbEccJwk.Append("{~"kty~":~"EC~",")
loo_SbEccJwk.Append("~"crv~":~"P-256~",")
loo_SbEccJwk.Append("~"x~":~"f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU~",")
loo_SbEccJwk.Append("~"y~":~"x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0~"")
loo_SbEccJwk.Append("}")
loo_EccKey = create oleobject
li_rc = loo_EccKey.ConnectToNewObject("Chilkat.PublicKey")
li_Success = loo_EccKey.LoadFromString(loo_SbEccJwk.GetAsString())
if li_Success = 0 then
Write-Debug loo_EccKey.LastErrorText
destroy loo_SbRsaJwk
destroy loo_RsaKey
destroy loo_SbEccJwk
destroy loo_EccKey
return
end if
// ---------------------------------------------------
// The HMAC key (in base64url format)
ls_HmacKey = "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"
// }
// ]
// }
loo_SbJws = create oleobject
li_rc = loo_SbJws.ConnectToNewObject("Chilkat.StringBuilder")
loo_SbJws.Append("{ ")
loo_SbJws.Append(" ~"payload~": ~"SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu~",")
loo_SbJws.Append(" ~"signatures~": [")
loo_SbJws.Append(" { ")
loo_SbJws.Append(" ~"protected~": ~"eyJhbGciOiJSUzI1NiIsImtpZCI6Im15UnNhS2V5In0~",")
loo_SbJws.Append(" ~"signature~": ~"IPMQ02niTQDwLzsRZSCaEm9VEyAX_AVe3HWjniNt9kW-a8d6ZVbd2k6jGae8s1yIh0cgxDnXQ6-p6_sBI0cnMO0xpuJANhh2vFtNJl5lisad94-H3mB3lSfafRqxeYp5D8bh39BPv7y3PrUNVMQdKEJp_D5oJ0ROPTIYx3EG8eJQOx1HO0KqhcUo401XR6KSsIyFm5joBLNKTVzxZUTT1RRZZtwTdeZkbGevugIOX_9gHAtARpV6WaFA4Vvjnq8X9wPgqjWNCQRupadhTPz0JAsa-wy5vXQjsFlXAn43mDPpMfna5Ab3F5pS4yDwkbX6nRn7XBxH1SnnNJRFholQZw~"")
loo_SbJws.Append(" },")
loo_SbJws.Append(" { ")
loo_SbJws.Append(" ~"protected~": ~"eyJhbGciOiJFUzI1NiIsImtpZCI6Im15RWNLZXkifQ~",")
loo_SbJws.Append(" ~"signature~": ~"1OQtaT3pgZmkDxvlfghvxL_8kX16WIen6u1MadEq1pA4qytA0--_EwZDNk00GDPWFpoJtKznibMZzLOg_UhHIw~"")
loo_SbJws.Append(" },")
loo_SbJws.Append(" { ")
loo_SbJws.Append(" ~"protected~": ~"eyJhbGciOiJIUzI1NiIsImtpZCI6Im15TWFjS2V5In0~",")
loo_SbJws.Append(" ~"signature~": ~"YY8yVjmJJfy7YJOn3uUydG8WCY2PEuCvOLil5Ks5lnw~"")
loo_SbJws.Append(" }")
loo_SbJws.Append(" ]")
loo_SbJws.Append("}")
loo_Jws = create oleobject
li_rc = loo_Jws.ConnectToNewObject("Chilkat.Jws")
li_Success = loo_Jws.LoadJwsSb(loo_SbJws)
if li_Success = 0 then
Write-Debug loo_Jws.LastErrorText
destroy loo_SbRsaJwk
destroy loo_RsaKey
destroy loo_SbEccJwk
destroy loo_EccKey
destroy loo_SbJws
destroy loo_Jws
return
end if
// The payload is easily accessible:
Write-Debug "Payload: " + loo_Jws.GetPayload("utf-8")
loo_SbKeyId = create oleobject
li_rc = loo_SbKeyId.ConnectToNewObject("Chilkat.StringBuilder")
li_BCaseSensitive = 0
loo_ProtHeader = create oleobject
li_rc = loo_ProtHeader.ConnectToNewObject("Chilkat.JsonObject")
li_NumSignatures = loo_Jws.NumSignatures
i = 0
do while i < li_NumSignatures
li_Success = loo_Jws.GetProtectedH(i,loo_ProtHeader)
if li_Success = 0 then
Write-Debug loo_Jws.LastErrorText
destroy loo_SbRsaJwk
destroy loo_RsaKey
destroy loo_SbEccJwk
destroy loo_EccKey
destroy loo_SbJws
destroy loo_Jws
destroy loo_SbKeyId
destroy loo_ProtHeader
return
end if
Write-Debug "--------------------------"
Write-Debug string(i) + ": "
// Get the protected header.
loo_ProtHeader.EmitCompact = 0
Write-Debug loo_ProtHeader.Emit()
// 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 GetUnprotectedH instead of GetProtectedH(i).
loo_SbKeyId.Clear()
loo_SbKeyId.Append(loo_ProtHeader.StringOf("kid"))
// Set the key based on key ID.
if loo_SbKeyId.ContentsEqual("myRsaKey",li_BCaseSensitive) = 1 then
loo_Jws.SetPublicKey(i,loo_RsaKey)
end if
if loo_SbKeyId.ContentsEqual("myEcKey",li_BCaseSensitive) = 1 then
loo_Jws.SetPublicKey(i,loo_EccKey)
end if
if loo_SbKeyId.ContentsEqual("myMacKey",li_BCaseSensitive) = 1 then
loo_Jws.SetMacKey(i,ls_HmacKey,"base64url")
end if
// Validate this signature.
v = loo_Jws.Validate(i)
if v < 0 then
// Perhaps Chilkat was not unlocked or the trial expired..
Write-Debug "Validate failed for some other reason."
Write-Debug loo_Jws.LastErrorText
else
if v = 0 then
Write-Debug "Invalid signature. The key was incorrect, the JWS was invalid, or both."
else
Write-Debug "Signature validated."
end if
end if
i = i + 1
loop
// 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.
destroy loo_SbRsaJwk
destroy loo_RsaKey
destroy loo_SbEccJwk
destroy loo_EccKey
destroy loo_SbJws
destroy loo_Jws
destroy loo_SbKeyId
destroy loo_ProtHeader