@spec sha256(String.t()) :: String.t()

Hashed the given string using sha256 algorithm and encode it as lowercase hex string.

Examples

iex> GcsSignedUrl.Crypto.sha256("foo")
"1fad6186e41f577a37f56589..."

@spec sign(String.t(), GcsSignedUrl.Client.t()) :: String.t()

@spec sign(String.t(), GcsSignedUrl.SignBlob.OAuthConfig.t()) ::
  {:ok, String.t()} | {:error, String.t()}

If you pass a %GcsSignedUrl.Client{} as second argument, this function signs the given string with the given client's private key.

If you pass a %GcsSignedUrl.SignBlob.OAuthConfig{} as second argument, this function signs the given string using the signBlob REST API.

(see https://cloud.google.com/iam/docs/reference/credentials/rest/v1/projects.serviceAccounts/signBlob)

Examples

iex> GcsSignedUrl.Crypto.sign("foo", %GcsSignedUrl.Client{private_key: "-----BEGIN RSA PRIVATE KEY-----..."})
"..."

iex> GcsSignedUrl.Crypto.sign("foo", %GcsSignedUrl.SignBlob.OAuthConfig{access_token: "..."})
{:ok, "1fad6186e41f577a37f56589..."}