# Code from <http://stackoverflow.com/a/6682934/1535629>
import base64, hashlib
# paste your key on line 6
key = """
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCjvkCvUy6ijNTJtjZ+NlpR3ymx8l8mytsi6BREDwTkM0zUwNnlTEApmBQkpjJCN97tNWMgSSmNiKbR9ds2lkXdfpJZR4yEsC39tx0wgmoY1CAYmiXY1h0jbumPSy0HvK5RvfabIbuUevwtQgg1J+Ah0yNYzxbdGmk94VsjXFNHDb/I9NAPwmI4uG6DIMIJce65xiSTauD+uTz9GZPoWtvZdKSxKm2598Z7ERLGjzj9AZUXdGjRaHNdeVP5R3yGEvNBcqaFTYKevPN4xcz97n1xDyDukdvEi8rRioEcKtpSM1noiZChp/N27c0CFUDKx65b4glcdbt9OkSpRCtbyMzCEqIUCwDw25s72OJUk8vS+vXnE8VwfO2jnlPxxkd8Ki9oDwHTa6OA+wpXsmKB3TOWzxbaS9oESzociQ9koTgelDEit7e+LjAlbvOVjCUp2rdiYPm34xWeD/S2zHbA8wXJG+aBcMPdIyGxXjMvUN29ZyIZpTihjYRJtsAF3R1Nphy8TlrELNz6v+hp5CxahzYEJixqUh8un+ZrTR3U/GaA7mMmfcg219uOioi8IfIC3SDl7smrkJtgxzzhPurbMjofDJBobjFEpJ/m35lsFtLt0tbMNf5nS9UkrVC9oewkrALDPzGnmr/DupRv8krJsh/1DB8E6M7JQn7JqiY0sabPzQ==
"""
def lineToFingerprint(line):
key = base64.b64decode(line.strip().split()[1].encode('ascii'))
fp_plain = hashlib.md5(key).hexdigest()
return ':'.join(a+b for a,b in zip(fp_plain[::2], fp_plain[1::2]))
print(lineToFingerprint(key))
IyBDb2RlIGZyb20gPGh0dHA6Ly9zdGFja292ZXJmbG93LmNvbS9hLzY2ODI5MzQvMTUzNTYyOT4KaW1wb3J0IGJhc2U2NCwgaGFzaGxpYgoKIyBwYXN0ZSB5b3VyIGtleSBvbiBsaW5lIDYKa2V5ID0gIiIiCnNzaC1yc2EgQUFBQUIzTnphQzF5YzJFQUFBQURBUUFCQUFBQ0FRQ2p2a0N2VXk2aWpOVEp0alorTmxwUjN5bXg4bDhteXRzaTZCUkVEd1RrTTB6VXdObmxURUFwbUJRa3BqSkNOOTd0TldNZ1NTbU5pS2JSOWRzMmxrWGRmcEpaUjR5RXNDMzl0eDB3Z21vWTFDQVltaVhZMWgwamJ1bVBTeTBIdks1UnZmYWJJYnVVZXZ3dFFnZzFKK0FoMHlOWXp4YmRHbWs5NFZzalhGTkhEYi9JOU5BUHdtSTR1RzZESU1JSmNlNjV4aVNUYXVEK3VUejlHWlBvV3R2WmRLU3hLbTI1OThaN0VSTEdqemo5QVpVWGRHalJhSE5kZVZQNVIzeUdFdk5CY3FhRlRZS2V2UE40eGN6OTduMXhEeUR1a2R2RWk4clJpb0VjS3RwU00xbm9pWkNocC9OMjdjMENGVURLeDY1YjRnbGNkYnQ5T2tTcFJDdGJ5TXpDRXFJVUN3RHcyNXM3Mk9KVWs4dlMrdlhuRThWd2ZPMmpubFB4eGtkOEtpOW9Ed0hUYTZPQSt3cFhzbUtCM1RPV3p4YmFTOW9FU3pvY2lROWtvVGdlbERFaXQ3ZStMakFsYnZPVmpDVXAycmRpWVBtMzR4V2VEL1MyekhiQTh3WEpHK2FCY01QZEl5R3hYak12VU4yOVp5SVpwVGloallSSnRzQUYzUjFOcGh5OFRsckVMTno2ditocDVDeGFoellFSml4cVVoOHVuK1pyVFIzVS9HYUE3bU1tZmNnMjE5dU9pb2k4SWZJQzNTRGw3c21ya0p0Z3h6emhQdXJiTWpvZkRKQm9iakZFcEovbTM1bHNGdEx0MHRiTU5mNW5TOVVrclZDOW9ld2tyQUxEUHpHbm1yL0R1cFJ2OGtySnNoLzFEQjhFNk03SlFuN0pxaVkwc2FiUHpRPT0KCiIiIgoKZGVmIGxpbmVUb0ZpbmdlcnByaW50KGxpbmUpOgogICAga2V5ID0gYmFzZTY0LmI2NGRlY29kZShsaW5lLnN0cmlwKCkuc3BsaXQoKVsxXS5lbmNvZGUoJ2FzY2lpJykpCiAgICBmcF9wbGFpbiA9IGhhc2hsaWIubWQ1KGtleSkuaGV4ZGlnZXN0KCkKICAgIHJldHVybiAnOicuam9pbihhK2IgZm9yIGEsYiBpbiB6aXAoZnBfcGxhaW5bOjoyXSwgZnBfcGxhaW5bMTo6Ml0pKQoKcHJpbnQobGluZVRvRmluZ2VycHJpbnQoa2V5KSk=