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Add sha256 fingerprint #15

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Add sha256 fingerprint #15

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7fef153
Add sha256 fingerprint
sbv-csis Dec 15, 2022
fd69fd5
Update README.md about fingerprint_sha256
sbv-csis Dec 15, 2022
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3 changes: 3 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ We aim to make the usage as stupid simple as possible, so there are only 2 expor
subjectKeyIdentifier: "E6:61:14:4E:5A:4B:51:0C:4E:6C:5E:3C:79:61:65:D4:BD:64:94:BE"
},
fingerprint: "FA:BE:B5:9B:ED:C2:2B:42:7E:B1:45:C8:9A:8A:73:16:4A:A0:10:09",
fingerprint_sha256: "FA:BE:B5:9B:ED:C2:2B:42:7E:B1:45:C8:9A:8A:73:16:4A:A0:10:09:C1:1A:C0:DE:D7:65:58:07:10:3E:1B:59:1E:A6:E9:7B:47",
issuer: %{
C: "US",
CN: "Go Daddy Secure Certification Authority",
Expand Down Expand Up @@ -74,6 +75,7 @@ iex(1)> File.read!("some_cert.der") |> EasySSL.parse_der
...SNIP...
},
fingerprint: "FA:BE:B5:9B:ED:C2:2B:42:7E:B1:45:C8:9A:8A:73:16:4A:A0:10:09",
fingerprint_sha256: "...",
issuer: %{
...SNIP...
},
Expand All @@ -99,6 +101,7 @@ iex(1)> File.read!("some_cert.pem") |> EasySSL.parse_pem
...SNIP...
},
fingerprint: "FA:BE:B5:9B:ED:C2:2B:42:7E:B1:45:C8:9A:8A:73:16:4A:A0:10:09",
fingerprint: "....",
issuer: %{
...SNIP...
},
Expand Down
8 changes: 5 additions & 3 deletions lib/easy_ssl.ex
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Expand Up @@ -46,6 +46,7 @@ defmodule EasySSL do
subjectKeyIdentifier: "E6:61:14:4E:5A:4B:51:0C:4E:6C:5E:3C:79:61:65:D4:BD:64:94:BE"
},
fingerprint: "FA:BE:B5:9B:ED:C2:2B:42:7E:B1:45:C8:9A:8A:73:16:4A:A0:10:09",
fingerprint_sha256: "FA:BE:B5:9B:ED:C2:2B:42:7E:B1:45:C8:9A:8A:73:16:4A:A0:10:09:DE:AD:BE:EF:CA:FE:BA:BE",
issuer: %{
C: "US",
CN: "Go Daddy Secure Certification Authority",
Expand Down Expand Up @@ -76,7 +77,8 @@ defmodule EasySSL do
cert = :public_key.pkix_decode_cert(certificate_der, :otp) |> get_field(:tbsCertificate)

serialized_certificate = %{}
|> Map.put(:fingerprint, certificate_der |> fingerprint_cert)
|> Map.put(:fingerprint, certificate_der |> fingerprint_cert(:sha))
|> Map.put(:fingerprint_sha256, certificate_der |> fingerprint_cert(:sha256))
|> Map.put(:serial_number, cert |> get_field(:serialNumber) |> Integer.to_string(16))
|> Map.put(:signature_algorithm, cert |> parse_signature_algo)
|> Map.put(:subject, cert |> parse_rdnsequence(:subject))
Expand Down Expand Up @@ -197,8 +199,8 @@ defmodule EasySSL do
elem(record, idx + 1)
end

defp fingerprint_cert(certificate) do
:crypto.hash(:sha, certificate)
defp fingerprint_cert(certificate, algorithm) do
:crypto.hash(algorithm, certificate)
|> Base.encode16
|> String.to_charlist
|> Enum.chunk_every(2, 2, :discard)
Expand Down
4 changes: 2 additions & 2 deletions test/easy_ssl_test.exs
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Expand Up @@ -5,14 +5,14 @@ defmodule EasySSLTest do
@pem_cert_dir "test/data/pem/"

def assert_has_normal_atom_keys(cert) do
keys = [:extensions, :fingerprint, :issuer, :not_after, :not_before, :serial_number, :signature_algorithm, :subject]
keys = [:extensions, :fingerprint, :fingerprint_sha256, :issuer, :not_after, :not_before, :serial_number, :signature_algorithm, :subject]
Enum.each(keys, fn key ->
assert Map.has_key?(cert, key)
end)
end

def assert_has_normal_string_keys(cert) do
keys = ["extensions", "fingerprint", "issuer", "not_after", "not_before", "serial_number", "signature_algorithm", "subject"]
keys = ["extensions", "fingerprint", "fingerprint_sha256", "issuer", "not_after", "not_before", "serial_number", "signature_algorithm", "subject"]
Enum.each(keys, fn key ->
assert Map.has_key?(cert, key)
end)
Expand Down