PureBasic
PureBasic
Create JWS with Multiple Signatures using the General JSON Serialization Format
See more JSON Web Signatures (JWS) Examples
Creates a JSON Web Signature (JWS) containing 3 signatures and output using the general JSON serialization format.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.
Chilkat PureBasic Downloads
IncludeFile "CkJws.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkPrivateKey.pb"
IncludeFile "CkJsonObject.pb"
Procedure ChilkatExample()
success.i = 0
; 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.
; The JWS to be created will contain three signatures.
; The 1st will use an ECC key, the 2nd an RSA key, and the 3rd an HMAC key.
; Prepare each key..
; ---------------------------------------------------
; 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,Chr(34) + "d" + Chr(34) + ":" + Chr(34) + "Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I")
CkStringBuilder::ckAppend(sbRsaJwk,"jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0")
CkStringBuilder::ckAppend(sbRsaJwk,"BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn")
CkStringBuilder::ckAppend(sbRsaJwk,"439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT")
CkStringBuilder::ckAppend(sbRsaJwk,"CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh")
CkStringBuilder::ckAppend(sbRsaJwk,"BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ" + Chr(34) + ",")
CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "p" + Chr(34) + ":" + Chr(34) + "4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi")
CkStringBuilder::ckAppend(sbRsaJwk,"YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG")
CkStringBuilder::ckAppend(sbRsaJwk,"BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc" + Chr(34) + ",")
CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "q" + Chr(34) + ":" + Chr(34) + "uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa")
CkStringBuilder::ckAppend(sbRsaJwk,"ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA")
CkStringBuilder::ckAppend(sbRsaJwk,"-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc" + Chr(34) + ",")
CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "dp" + Chr(34) + ":" + Chr(34) + "BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q")
CkStringBuilder::ckAppend(sbRsaJwk,"CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb")
CkStringBuilder::ckAppend(sbRsaJwk,"34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0" + Chr(34) + ",")
CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "dq" + Chr(34) + ":" + Chr(34) + "h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa")
CkStringBuilder::ckAppend(sbRsaJwk,"7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky")
CkStringBuilder::ckAppend(sbRsaJwk,"NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU" + Chr(34) + ",")
CkStringBuilder::ckAppend(sbRsaJwk,Chr(34) + "qi" + Chr(34) + ":" + Chr(34) + "IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o")
CkStringBuilder::ckAppend(sbRsaJwk,"y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU")
CkStringBuilder::ckAppend(sbRsaJwk,"W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U" + Chr(34))
CkStringBuilder::ckAppend(sbRsaJwk,"}")
rsaKey.i = CkPrivateKey::ckCreate()
If rsaKey.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
; Note: This example loads the RSA key from JWK format. Any format can be loaded
; into the private key object. (See the online reference documentation..)
success = CkPrivateKey::ckLoadJwk(rsaKey,CkStringBuilder::ckGetAsString(sbRsaJwk))
If success <> 1
Debug CkPrivateKey::ckLastErrorText(rsaKey)
CkStringBuilder::ckDispose(sbRsaJwk)
CkPrivateKey::ckDispose(rsaKey)
ProcedureReturn
EndIf
; ---------------------------------------------------
; Use the following ECC 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,Chr(34) + "d" + Chr(34) + ":" + Chr(34) + "jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI" + Chr(34))
CkStringBuilder::ckAppend(sbEccJwk,"}")
eccKey.i = CkPrivateKey::ckCreate()
If eccKey.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
; Note: This example loads the ECDSA key from JWK format. Any format can be loaded
; into the private key object. (See the online reference documentation..)
success = CkPrivateKey::ckLoadJwk(eccKey,CkStringBuilder::ckGetAsString(sbEccJwk))
If success <> 1
Debug CkPrivateKey::ckLastErrorText(eccKey)
CkStringBuilder::ckDispose(sbRsaJwk)
CkPrivateKey::ckDispose(rsaKey)
CkStringBuilder::ckDispose(sbEccJwk)
CkPrivateKey::ckDispose(eccKey)
ProcedureReturn
EndIf
; ---------------------------------------------------
; The HMAC key (in base64url format)
hmacKey.s = "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"
; ---------------------------------------------------
; Prepare the headers..
; RSASSA-PKCS1-v1_5 SHA-256
jwsProtHdr0.i = CkJsonObject::ckCreate()
If jwsProtHdr0.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckAppendString(jwsProtHdr0,"alg","RS256")
jwsUnprotHdr0.i = CkJsonObject::ckCreate()
If jwsUnprotHdr0.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckAppendString(jwsUnprotHdr0,"kid","myRsaKey")
; ECDSA using P-256 and SHA-256
jwsProtHdr1.i = CkJsonObject::ckCreate()
If jwsProtHdr1.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckAppendString(jwsProtHdr1,"alg","ES256")
jwsUnprotHdr1.i = CkJsonObject::ckCreate()
If jwsUnprotHdr1.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckAppendString(jwsUnprotHdr1,"kid","myEcKey")
; HMAC using SHA-256
jwsProtHdr2.i = CkJsonObject::ckCreate()
If jwsProtHdr2.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckAppendString(jwsProtHdr2,"alg","HS256")
jwsUnprotHdr2.i = CkJsonObject::ckCreate()
If jwsUnprotHdr2.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckAppendString(jwsUnprotHdr2,"kid","myMacKey")
; ---------------------------------------------------
; First set the JWS headers, keys, and payload, then we'll create the JWS...
jws.i = CkJws::ckCreate()
If jws.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJws::ckSetProtectedHeader(jws,0,jwsProtHdr0)
CkJws::ckSetUnprotectedHeader(jws,0,jwsUnprotHdr0)
CkJws::ckSetProtectedHeader(jws,1,jwsProtHdr1)
CkJws::ckSetUnprotectedHeader(jws,1,jwsUnprotHdr1)
CkJws::ckSetProtectedHeader(jws,2,jwsProtHdr2)
CkJws::ckSetUnprotectedHeader(jws,2,jwsUnprotHdr2)
CkJws::ckSetPrivateKey(jws,0,rsaKey)
CkJws::ckSetPrivateKey(jws,1,eccKey)
CkJws::ckSetMacKey(jws,2,hmacKey,"base64url")
bIncludeBom.i = 0
payloadStr.s = "In our village, folks say God crumbles up the old moon into stars."
CkJws::ckSetPayload(jws,payloadStr,"utf-8",bIncludeBom)
; ---------------------------------------------------
; Create the JWS.
; Givent that multiple signatures will exist, only the general JSON serialization
; format is possible, and that is what will be produced.
jwsStr.s = CkJws::ckCreateJws(jws)
If CkJws::ckLastMethodSuccess(jws) <> 1
Debug CkJws::ckLastErrorText(jws)
CkStringBuilder::ckDispose(sbRsaJwk)
CkPrivateKey::ckDispose(rsaKey)
CkStringBuilder::ckDispose(sbEccJwk)
CkPrivateKey::ckDispose(eccKey)
CkJsonObject::ckDispose(jwsProtHdr0)
CkJsonObject::ckDispose(jwsUnprotHdr0)
CkJsonObject::ckDispose(jwsProtHdr1)
CkJsonObject::ckDispose(jwsUnprotHdr1)
CkJsonObject::ckDispose(jwsProtHdr2)
CkJsonObject::ckDispose(jwsUnprotHdr2)
CkJws::ckDispose(jws)
ProcedureReturn
EndIf
; The jwsStr is contains JSON in the smallest possible size, which is a single line.
; To get in human-readable format, load into a Chilkat JSON object and emit..
json.i = CkJsonObject::ckCreate()
If json.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
CkJsonObject::ckLoad(json,jwsStr)
CkJsonObject::setCkEmitCompact(json, 0)
Debug CkJsonObject::ckEmit(json)
; Sample output:
; {
; "payload": "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu",
; "signatures": [
; {
; "protected": "eyJhbGciOiJSUzI1NiJ9",
; "header": {
; "kid": "myRsaKey"
; },
; "signature": "B04c24gSnpVm1Z-_bemfyNMCpZm6Knj1yB-yzaIOvijsWfDgoF_mSJccTIbzapNgwJudnobr5iDOfZWiRR9iqCyDJLe5M1S40vFF7MFEI3JecYRgrRc6n1lTkYLMRyVq48BwbQlmKgPqmK9drun3agklsr0FmgNx65pfmcnlYdXsgwxf8WbgppefrlrMImp-98-dNtBcUL8ce1aOjbcyVFjGMCzpm3JerQqIzWQvEwBstnMEQle73KHcyx_nsTmlzY70CaydbRTsciOATL7WfiMwuX1q9Y2NIpTg3CbOTWKdwjh7iyfiAKQxNBaF2mApnqj9hjpf8GwR-CfxAzJtPg"
; },
; {
; "protected": "eyJhbGciOiJFUzI1NiJ9",
; "header": {
; "kid": "myEcKey"
; },
; "signature": "2cbugKq0ERaQMh01n2B-86EZFYleeMf8bsccaQMxzOxAg14PxfjR3IImvodTJYqkmfBJYW203etz2-7ZtJUOGw"
; },
; {
; "protected": "eyJhbGciOiJIUzI1NiJ9",
; "header": {
; "kid": "myMacKey"
; },
; "signature": "e7R9gjx0RsUNa3c7qd8k9mQGEhtcG8vsN1W7jbLb2MA"
; }
; ]
; }
CkStringBuilder::ckDispose(sbRsaJwk)
CkPrivateKey::ckDispose(rsaKey)
CkStringBuilder::ckDispose(sbEccJwk)
CkPrivateKey::ckDispose(eccKey)
CkJsonObject::ckDispose(jwsProtHdr0)
CkJsonObject::ckDispose(jwsUnprotHdr0)
CkJsonObject::ckDispose(jwsProtHdr1)
CkJsonObject::ckDispose(jwsUnprotHdr1)
CkJsonObject::ckDispose(jwsProtHdr2)
CkJsonObject::ckDispose(jwsUnprotHdr2)
CkJws::ckDispose(jws)
CkJsonObject::ckDispose(json)
ProcedureReturn
EndProcedure