Tcl
Tcl
JWS Using RSASSA-PSS using SHA-256 and MGF1 with SHA-256
See more JSON Web Signatures (JWS) Examples
Creates and validates a JSON Web Signature (JWS) using RSASSA-PSS using SHA-256 and MGF1 with SHA-256.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 Tcl Downloads
load ./chilkat.dll
set success 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.
# Use the following RSA key loaded from JWK format.
set sbJwk [new_CkStringBuilder]
CkStringBuilder_Append $sbJwk "{\"kty\":\"RSA\","
CkStringBuilder_Append $sbJwk "\"n\":\"ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx"
CkStringBuilder_Append $sbJwk "HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs"
CkStringBuilder_Append $sbJwk "D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH"
CkStringBuilder_Append $sbJwk "SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV"
CkStringBuilder_Append $sbJwk "MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8"
CkStringBuilder_Append $sbJwk "NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ\","
CkStringBuilder_Append $sbJwk "\"e\":\"AQAB\","
CkStringBuilder_Append $sbJwk "\"d\":\"Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I"
CkStringBuilder_Append $sbJwk "jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0"
CkStringBuilder_Append $sbJwk "BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn"
CkStringBuilder_Append $sbJwk "439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT"
CkStringBuilder_Append $sbJwk "CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh"
CkStringBuilder_Append $sbJwk "BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ\","
CkStringBuilder_Append $sbJwk "\"p\":\"4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi"
CkStringBuilder_Append $sbJwk "YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG"
CkStringBuilder_Append $sbJwk "BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc\","
CkStringBuilder_Append $sbJwk "\"q\":\"uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa"
CkStringBuilder_Append $sbJwk "ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA"
CkStringBuilder_Append $sbJwk "-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc\","
CkStringBuilder_Append $sbJwk "\"dp\":\"BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q"
CkStringBuilder_Append $sbJwk "CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb"
CkStringBuilder_Append $sbJwk "34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0\","
CkStringBuilder_Append $sbJwk "\"dq\":\"h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa"
CkStringBuilder_Append $sbJwk "7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky"
CkStringBuilder_Append $sbJwk "NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU\","
CkStringBuilder_Append $sbJwk "\"qi\":\"IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o"
CkStringBuilder_Append $sbJwk "y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU"
CkStringBuilder_Append $sbJwk "W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U\""
CkStringBuilder_Append $sbJwk "}"
set rsaKey [new_CkPrivateKey]
# 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..)
set success [CkPrivateKey_LoadJwk $rsaKey [CkStringBuilder_getAsString $sbJwk]]
if {$success == 0} then {
puts [CkPrivateKey_lastErrorText $rsaKey]
delete_CkStringBuilder $sbJwk
delete_CkPrivateKey $rsaKey
exit
}
# Create the JWS Protected Header
set jwsProtHdr [new_CkJsonObject]
CkJsonObject_AppendString $jwsProtHdr "alg" "PS256"
set jws [new_CkJws]
# Set the protected header:
set signatureIndex 0
CkJws_SetProtectedHeader $jws $signatureIndex $jwsProtHdr
# Set the RSA key:
CkJws_SetPrivateKey $jws $signatureIndex $rsaKey
# Set the payload.
set bIncludeBom 0
set payloadStr "In our village, folks say God crumbles up the old moon into stars."
CkJws_SetPayload $jws $payloadStr "utf-8" $bIncludeBom
# Create the JWS
# By default, the compact serialization is used.
set jwsCompact [CkJws_createJws $jws]
if {[CkJws_get_LastMethodSuccess $jws] == 0} then {
puts [CkJws_lastErrorText $jws]
delete_CkStringBuilder $sbJwk
delete_CkPrivateKey $rsaKey
delete_CkJsonObject $jwsProtHdr
delete_CkJws $jws
exit
}
puts "JWS: $jwsCompact"
# Note: RSA PSS padding uses random values, so the output will be different each time a signature is produced.
# sample output:
# JWS: eyJhbGciOiJQUzI1NiJ9.SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu.TRWhwRo5dMv9-8OzrInfJTwmUGYgjLfHk8lqF072ND-FmLWEBnUTOpY8oJXp8FdWw2SalbdOeNlrtlJjwk4XK8Ql2iJ_2qMCtxsvLPhKBOqFoAF4aBvTOEDVJDxf0DaBSiydEEtfTVV2iwBcjWabu5J2XieR5y7QZQtuHsn7T3qKBvCcCejN3Y2oqAT3qMHvu1fTms1r_91wBn_K7Wjd9UkZ1n02qQcUHJznR_OF2BgN7_KWIDAF9ZS9keoju2NPpPelO4yxa2XUPnehY3G7dHKoCxUEQR4d2Xc5voqDASTVCDqQS4PVOZdvT3Ein6-SanAlCwbWBbkvT8g6-5PImQ
# Now load the JWS, validate, and recover the original text.
set jws2 [new_CkJws]
# Load the JWS.
set success [CkJws_LoadJws $jws2 $jwsCompact]
set rsaPubKey [new_CkPublicKey]
CkPrivateKey_ToPublicKey $rsaKey $rsaPubKey
# Set the RSA public key used for validation.
set signatureIndex 0
CkJws_SetPublicKey $jws2 $signatureIndex $rsaPubKey
# Validate the 1st (and only) signature at index 0..
set v [CkJws_Validate $jws2 $signatureIndex]
if {$v < 0} then {
# Perhaps Chilkat was not unlocked or the trial expired..
puts "Method call failed for some other reason."
puts [CkJws_lastErrorText $jws2]
delete_CkStringBuilder $sbJwk
delete_CkPrivateKey $rsaKey
delete_CkJsonObject $jwsProtHdr
delete_CkJws $jws
delete_CkJws $jws2
delete_CkPublicKey $rsaPubKey
exit
}
if {$v == 0} then {
puts "Invalid signature. The RSA key was incorrect, the JWS was invalid, or both."
delete_CkStringBuilder $sbJwk
delete_CkPrivateKey $rsaKey
delete_CkJsonObject $jwsProtHdr
delete_CkJws $jws
delete_CkJws $jws2
delete_CkPublicKey $rsaPubKey
exit
}
# If we get here, the signature was validated..
puts "Signature validated."
# Recover the original content:
puts [CkJws_getPayload $jws2 utf-8]
# Examine the protected header:
set joseHeader [new_CkJsonObject]
CkJws_GetProtectedH $jws2 $signatureIndex $joseHeader
CkJsonObject_put_EmitCompact $joseHeader 0
puts "Protected (JOSE) header:"
puts [CkJsonObject_emit $joseHeader]
# Output:
# Signature validated.
# In our village, folks say God crumbles up the old moon into stars.
# Protected (JOSE) header:
# {
# "alg": "PS256"
# }
delete_CkStringBuilder $sbJwk
delete_CkPrivateKey $rsaKey
delete_CkJsonObject $jwsProtHdr
delete_CkJws $jws
delete_CkJws $jws2
delete_CkPublicKey $rsaPubKey
delete_CkJsonObject $joseHeader