get x and y components from ecc public key in PEM format using openssl

Question

I am generating a KeyPair for ECC from curve 'secp128r1' using openssl

Steps I followed :

• first I generated a private key using the command

  openssl ecparam -genkey -name secp128r1 -noout -out private.pem

• then i viewed the corresponding public key using the command

  openssl ec -in private.pem -text -noout

  which showed an output as :

  read EC key

  Private-Key: (128 bit)
  priv:
  00:9f:bf:2b:bd:06:86:3a:a1:bc:7c:3e:90:57:40:
  f4:bc
  pub:
  04:04:ce:24:34:d4:cb:f2:58:94:2f:8a:5f:06:d7:
  3f:ed:5a:50:ef:fb:cc:b7:49:62:16:62:9e:aa:d5:
  30:a8:a5
  
  ASN1 OID: secp128r1

I want explicitly x and y components from the public key generated here, please can anyone suggest the correct way of doing this ?
The above public key is 264 bits long, hence cannot take(/split) it as is
Thanks

Answer 1

Pub:
04:04:ce:24:34:d4:cb:f2:58:94:2f:8a:5f:06:d7:
3f:ed:5a:50:ef:fb:cc:b7:49:62:16:62:9e:aa:d5:
30:a8:a5

• 0x04 indicates uncompressed form
• From what remains:
  • X is first half 04:ce:24:34:d4:cb:f2:58:94:2f:8a:5f:06:d7:3f:ed
  • Y is second half 5a:50:ef:fb:cc:b7:49:62:16:62:9e:aa:d5:30:a8:a5

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UPD. Found this website that contains further details.