SES BYODKIM - Streamline Private and Public Key by Python Script

In Amazon SES document, it states the following:

You have to delete the first and last lines (-----BEGIN PRIVATE KEY----- and -----END PRIVATE KEY-----, respectively) of the generated private(public) key. Additionally, you have to remove the line breaks in the generated private key. The resulting value is a string of characters with no spaces or line breaks.

source

If the private or public is not streamlined, you won't be able to use them with SES BYODKIM.

At the meantime, you also need to generate a random string as selector in TXT DNS record publishing the public key

Name	Type	Value
selector._domainkey.example.com	TXT	p=yourPublicKey

Replace selector with a unique name that identifies the key.
Here is the Python Script to complete

source

Here is python script can do the both.

import sys, string, random

def streamline_key(keyLocation):
   keyLines=open(keyLocation).readlines()
   keyStream=[]
   for line in keyLines[1:-1]:
      keyStream.append(line.replace('\n', ''))
   key=''.join(keyStream)
   return key

print(sys.argv)

key1Location=sys.argv[-3]
print(key1Location)

key2Location=sys.argv[-2]
print(key2Location)

domain=sys.argv[-1]
print(domain)

key1Streamline=streamline_key(key1Location)
print(key1Location+" streamline:\n" + key1Streamline )
print("\n")
key2Streamline=streamline_key(key2Location)
print(key2Location+" streamline:\n" + key2Streamline)
print("\n")
selector = ''.join(random.choice(string.ascii_lowercase + string.digits) for i in range(32))
print("public key TXT record name:\n" + selector+'._domainkey.'+domain)

Save the code with name Run the code 'remove-newline-in-key.py' in the same folder storing private key and public key. Then run the script as following format in command line. My public key name is public.key.

% python remove-newline-in-key.py private.key public.key example.com

You will get the following result

['remove-newline-in-key.py', 'private.key', 'public.key', 'example.com']
private.key
public.key
example.com
private.key streamline:
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

public.key streamline:
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDHT1n81TGGobZL07wX17Fa+djtgh1KJPCc3qArdTrt7dUpg5ld++efs7cRo+5xcFAlRZq0+WZmmg2ebuyXfOeipno7ZSHrjxwbfcLqGosCNSKIV1mQDBi4vqqPhV9ZB5Ppyo+ZzCzavXUjhPMV135rT3M/geCwAqbkEVzRoagi5QIDAQAB

public key TXT record name:
w2hajm6q1zoe0gw1q993shhmqopj5auy._domainkey.example.com