futur.blue
objective categorical abstract machine language personal data server
Low-S normalize DPoP signature before verifying
+6
kleidos/kleidos.ml
+6
kleidos/kleidos.ml
···
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val normalize_pubkey_to_raw : bytes -> bytes
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val low_s_normalize_signature : bytes -> bytes
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+
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val sign : privkey:bytes -> msg:bytes -> bytes
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val verify : pubkey:bytes -> msg:bytes -> signature:bytes -> bool
···
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failwith "invalid compressed key" )
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| len ->
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failwith ("invalid key length: " ^ string_of_int len)
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+
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let low_s_normalize_signature = Low_s.normalize_k256
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let sign ~privkey ~msg : bytes =
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let hashed = SHA2_256.hash msg in
···
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failwith "invalid compressed key" )
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| len ->
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failwith ("invalid key length: " ^ string_of_int len)
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+
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let low_s_normalize_signature = Low_s.normalize_p256
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let sign ~privkey ~msg : bytes =
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let hashed = SHA2_256.hash msg in
+11
-10
pegasus/lib/oauth/dpop.ml
+11
-10
pegasus/lib/oauth/dpop.ml
···
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let x = x |> Jwt.b64_decode |> Bytes.of_string in
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let y = y |> Jwt.b64_decode |> Bytes.of_string in
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let pubkey = Bytes.cat (Bytes.of_string "\x04") (Bytes.cat x y) in
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-
let pubkey =
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( pubkey
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, match crv with
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| "secp256k1" ->
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(module Kleidos.K256 : Kleidos.CURVE)
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| "P-256" ->
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(module Kleidos.P256 : Kleidos.CURVE)
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| _ ->
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failwith "unsupported algorithm" )
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in
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let sig_bytes = Jwt.b64_decode sig_b64 |> Bytes.of_string in
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let r = Bytes.sub sig_bytes 0 32 in
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let s = Bytes.sub sig_bytes 32 32 in
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let signature = Bytes.cat r s in
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let pubkey, signature =
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match crv with
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| "secp256k1" ->
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( (pubkey, (module Kleidos.K256 : Kleidos.CURVE))
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, Kleidos.K256.low_s_normalize_signature signature )
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| "P-256" ->
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( (pubkey, (module Kleidos.P256 : Kleidos.CURVE))
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, Kleidos.P256.low_s_normalize_signature signature )
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| _ ->
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failwith "unsupported algorithm"
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in
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Kleidos.verify ~pubkey ~msg ~signature
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| _ ->
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false