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(Tcl) Load ECC Public Key from JWK Format (JSON Web Key)Demonstrates how to load an ECC public key from JWK (JSON Web Key) format. Note: This example requires Chilkat v9.5.0.66 or later.
load ./chilkat.dll # Note: This example requires Chilkat v9.5.0.66 or later. # First build a JWK sample to load.. set json [new_CkJsonObject] CkJsonObject_UpdateString $json "kty" "EC" CkJsonObject_UpdateString $json "crv" "P-256" CkJsonObject_UpdateString $json "x" "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE" CkJsonObject_UpdateString $json "y" "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU" # The JSON contains the following: # { # "kty": "EC", # "crv": "P-256", # "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE", # "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU", # } # Note: The JSON can contain other members, such as "use", "kid", or anything else. These will be ignored. CkJsonObject_put_EmitCompact $json 0 # Show the JWK string to be loaded: set jwkStr [CkJsonObject_emit $json] set pubKey [new_CkPublicKey] # The LoadFromString method will automatically detect the format. set success [CkPublicKey_LoadFromString $pubKey $jwkStr] if {[expr $success != 1]} then { puts [CkPublicKey_lastErrorText $pubKey] delete_CkJsonObject $json delete_CkPublicKey $pubKey exit } # OK.. the JWK is loaded. It can be used in whatever way desired... # The key can be retrieved in any other format, such as XML or PEM.. puts [CkPublicKey_getXml $pubKey] # XML output: # <ECCPublicKey curve="secp256r1" # x="A01532A3C0900053DE60FBEFEFCCA58793301598D308B41E6F4E364E388C2711" # y="BEF432C599148C94143D4FF46C2CB73E3E6A41D7EEF23C047EA11E60667DE425"> # MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAAAAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA///////////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSdNgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABKAVMqPAkABT3mD77+/MpYeTMBWY0wi0Hm9ONk44jCcRvvQyxZkUjJQUPU/0bCy3Pj5qQdfu8jwEfqEeYGZ95CU= # </ECCPublicKey> # Choose PCKS1 or PCKS8 PEM format.. set bPreferPkcs1 0 puts [CkPublicKey_getPem $pubKey $bPreferPkcs1] # PEM output # -----BEGIN PUBLIC KEY----- # MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA # AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA//// # ///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd # NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5 # RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA # //////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABKAVMqPAkABT3mD77+/MpYeT # MBWY0wi0Hm9ONk44jCcRvvQyxZkUjJQUPU/0bCy3Pj5qQdfu8jwEfqEeYGZ95CU= # -----END PUBLIC KEY----- delete_CkJsonObject $json delete_CkPublicKey $pubKey |
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