Cryppo.Rsa4096.verify

You're seeing just the function verify, go back to Cryppo.Rsa4096 module for more information.
Link to this function

verify(rsa_signature, public_key)

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Specs

verify(
  Cryppo.RsaSignature.t(),
  rsa_public_key() | rsa_private_key() | Cryppo.EncryptionKey.t() | pem()
) :: boolean() | {:error, :invalid_encryption_key}

Verifies an RSA signature with a public key

The key for verification can be pretty much any format and type, private keys are also accepted:

With a public key in the Erlang format:

iex> encryption_key = Cryppo.generate_encryption_key("Rsa4096")
iex> signature = Cryppo.Rsa4096.sign("data to sign", encryption_key)
iex> public_key = Cryppo.Rsa4096.private_key_to_public_key(encryption_key)
iex> Cryppo.Rsa4096.verify(signature, public_key)
true

With a private key in the Erlang format:

iex> encryption_key = Cryppo.generate_encryption_key("Rsa4096")
iex> signature = Cryppo.Rsa4096.sign("data to sign", encryption_key)
iex> Cryppo.Rsa4096.verify(signature, encryption_key.key)
true

With a Cryppo.EncryptionKey struct:

iex> encryption_key = Cryppo.generate_encryption_key("Rsa4096")
iex> signature = Cryppo.Rsa4096.sign("data to sign", encryption_key)
iex> Cryppo.Rsa4096.verify(signature, encryption_key)
true

With a PEM

iex> pem_with_private_key = "-----BEGIN RSA PRIVATE KEY-----\n" <>
...>       "MIICWwIBAAKBgQDKCUh7F4p5btzcSLBaToHvD3rCZX4fMaDtjkN5TwmC3/6iQzD5\n" <>
...>       "tn396BzDTdQ16HuuZ+eN+KQSa1QWr2h1DB13nVP+moeyLVC8BShiM3NBRn77r7Lr\n" <>
...>       "sWooM3mwnSvMPWWnBj1c+0tbO7zfur5wQdzBl66HrHgHt+Bz6f+dDj+aVwIDAQAB\n" <>
...>       "AoGAMHh3rihgrW9+h07dGF1baOoyzm6hCoTSkguefn0K0B5DLdSm7FHu+jp0pBqI\n" <>
...>       "/gHvolEFSZdMbarYOrUMf4BPlRSarCjjxf/beV4Pj/UQrCkDmNBBVJp33Sy8HEdb\n" <>
...>       "Wrzk+k8NcAS1UR4R6EW9JrUz0mMwX6CsvG2zZMbpS/Q9KXkCQQDwmCXjOTPQ+bxW\n" <>
...>       "K4gndHnXD5QkKNcTdFq64ef23R6AY0XEGkiRLDXZZA09hDIACgSSfk1Qbo0SJSvU\n" <>
...>       "TAR8A6clAkEA1vkWJ5qUo+xuIZB+2604LRco1GYAj5/fZ2kvUMjbOdCFgFaDVzJY\n" <>
...>       "X2pzLkk7RZNgPvXcRAgX7FlWmm4jwZzQywJARrHeSCMRx7DqF0PZUQaXmorYU7uw\n" <>
...>       "XuYMluc0WsRkZwNEh7fVZNrhw8vzXAUREBPhfg4gt6aUSyWi+FGR68LDBQJAC55O\n" <>
...>       "ujk6i1l94kaC9LB59sXnqQMSSLDlTBt9OSqB3rAMZxFF6/KGoDGKpBfFIk+CxiRX\n" <>
...>       "kT22vUleyt3lBNPK3QJAEr56asvREcIDFkbs7Ebjev4U1PL58w78ipp49Ti5FiwH\n" <>
...>       "vR9vuGcUcIDcWKOl05t4D35F5A/DskP6dGYA1cuWNg==\n" <>
...>       "-----END RSA PRIVATE KEY-----\n\n"
...> signature = Cryppo.Rsa4096.sign("data to sign", pem_with_private_key)
...> {:ok, key} = Cryppo.Rsa4096.from_pem(pem_with_private_key)
...> {:ok, pem_with_public_key} = key
...> |> Cryppo.Rsa4096.private_key_to_public_key()
...> |> Cryppo.Rsa4096.to_pem()
...> Cryppo.Rsa4096.verify(signature, pem_with_public_key)
true