Chilkat2-Python

Get ECC Public Key in JWK Format (JSON Web Key)

See more ECC Examples

Demonstrates how to get an ECC public key in JWK (JSON Web Key) format.

Note: This example requires Chilkat v9.5.0.66 or later.

Chilkat2-Python

import sys
import chilkat2

success = False

# Note: This example requires Chilkat v9.5.0.66 or later.

# Load a PEM file into memory.
sbPem = chilkat2.StringBuilder()
success = sbPem.LoadFile("qa_data/pem/ecc_public.pem","utf-8")
if (success != True):
    print("Failed to load PEM file.")
    sys.exit()

# Load the PEM into a public key object.
pubKey = chilkat2.PublicKey()
success = pubKey.LoadFromString(sbPem.GetAsString())
if (success != True):
    print(pubKey.LastErrorText)
    sys.exit()

# Get the public key in JWK format:
jwk = pubKey.GetJwk()

# The GetJwk method will return the JWK in the most compact JSON format possible,
# as a single line with no extra whitespace.  To get a more human-readable JWK (for this example),
# load into a Chilkat JSON object and emit non-compact:

json = chilkat2.JsonObject()
json.Load(jwk)
json.EmitCompact = False
print("ECC Public Key in JWK format:")
print(json.Emit())

# Sample output:
# { 
#   "kty": "EC",
#   "crv": "P-256",
#   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
#   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU"
# }
# 
# Additional information can be added like this:
json.AppendString("use","enc")
json.AppendString("kid","123ABC")

# Now examine the JSON:
print(json.Emit())

# { 
#   "kty": "EC",
#   "crv": "P-256",
#   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
#   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
#   "use": "enc",
#   "kid": "123ABC"
# }