(PowerShell) Create JWS with Multiple Signatures using the General JSON Serialization Format

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 .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# 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 = New-Object Chilkat.StringBuilder
$sbRsaJwk.Append("{`"kty`":`"RSA`",")
$sbRsaJwk.Append("`"n`":`"ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx")
$sbRsaJwk.Append("HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs")
$sbRsaJwk.Append("D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH")
$sbRsaJwk.Append("SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV")
$sbRsaJwk.Append("MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8")
$sbRsaJwk.Append("NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ`",")
$sbRsaJwk.Append("`"e`":`"AQAB`",")
$sbRsaJwk.Append("`"d`":`"Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I")
$sbRsaJwk.Append("jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0")
$sbRsaJwk.Append("BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn")
$sbRsaJwk.Append("439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT")
$sbRsaJwk.Append("CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh")
$sbRsaJwk.Append("BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ`",")
$sbRsaJwk.Append("`"p`":`"4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi")
$sbRsaJwk.Append("YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG")
$sbRsaJwk.Append("BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc`",")
$sbRsaJwk.Append("`"q`":`"uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa")
$sbRsaJwk.Append("ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA")
$sbRsaJwk.Append("-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc`",")
$sbRsaJwk.Append("`"dp`":`"BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q")
$sbRsaJwk.Append("CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb")
$sbRsaJwk.Append("34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0`",")
$sbRsaJwk.Append("`"dq`":`"h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa")
$sbRsaJwk.Append("7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky")
$sbRsaJwk.Append("NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU`",")
$sbRsaJwk.Append("`"qi`":`"IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o")
$sbRsaJwk.Append("y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU")
$sbRsaJwk.Append("W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U`"")
$sbRsaJwk.Append("}")

$rsaKey = New-Object Chilkat.PrivateKey
# 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 = $rsaKey.LoadJwk($sbRsaJwk.GetAsString())
if ($success -ne $true) {
    $($rsaKey.LastErrorText)
    exit
}

# ---------------------------------------------------
# Use the following ECC key loaded from JWK format.
$sbEccJwk = New-Object Chilkat.StringBuilder
$sbEccJwk.Append("{`"kty`":`"EC`",")
$sbEccJwk.Append("`"crv`":`"P-256`",")
$sbEccJwk.Append("`"x`":`"f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU`",")
$sbEccJwk.Append("`"y`":`"x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0`",")
$sbEccJwk.Append("`"d`":`"jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI`"")
$sbEccJwk.Append("}")

$eccKey = New-Object Chilkat.PrivateKey
# 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 = $eccKey.LoadJwk($sbEccJwk.GetAsString())
if ($success -ne $true) {
    $($eccKey.LastErrorText)
    exit
}

# ---------------------------------------------------
# The HMAC key (in base64url format)
$hmacKey = "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"

# ---------------------------------------------------
# Prepare the headers..
# RSASSA-PKCS1-v1_5 SHA-256
$jwsProtHdr0 = New-Object Chilkat.JsonObject
$jwsProtHdr0.AppendString("alg","RS256")
$jwsUnprotHdr0 = New-Object Chilkat.JsonObject
$jwsUnprotHdr0.AppendString("kid","myRsaKey")

# ECDSA using P-256 and SHA-256
$jwsProtHdr1 = New-Object Chilkat.JsonObject
$jwsProtHdr1.AppendString("alg","ES256")
$jwsUnprotHdr1 = New-Object Chilkat.JsonObject
$jwsUnprotHdr1.AppendString("kid","myEcKey")

# HMAC using SHA-256
$jwsProtHdr2 = New-Object Chilkat.JsonObject
$jwsProtHdr2.AppendString("alg","HS256")
$jwsUnprotHdr2 = New-Object Chilkat.JsonObject
$jwsUnprotHdr2.AppendString("kid","myMacKey")

# ---------------------------------------------------
# First set the JWS headers, keys, and payload, then we'll create the JWS...
$jws = New-Object Chilkat.Jws

$jws.SetProtectedHeader(0,$jwsProtHdr0)
$jws.SetUnprotectedHeader(0,$jwsUnprotHdr0)
$jws.SetProtectedHeader(1,$jwsProtHdr1)
$jws.SetUnprotectedHeader(1,$jwsUnprotHdr1)
$jws.SetProtectedHeader(2,$jwsProtHdr2)
$jws.SetUnprotectedHeader(2,$jwsUnprotHdr2)

$jws.SetPrivateKey(0,$rsaKey)
$jws.SetPrivateKey(1,$eccKey)
$jws.SetMacKey(2,$hmacKey,"base64url")

$bIncludeBom = $false
$payloadStr = "In our village, folks say God crumbles up the old moon into stars."
$jws.SetPayload($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 = $jws.CreateJws()
if ($jws.LastMethodSuccess -ne $true) {
    $($jws.LastErrorText)
    exit
}

# 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 = New-Object Chilkat.JsonObject
$json.Load($jwsStr)
$json.EmitCompact = $false
$($json.Emit())

# 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"
#     }
#   ]
# }