45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
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package jose
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import "encoding/base64"
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// Encoder is satisfied if the type can marshal itself into a valid
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// structure for a JWS.
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type Encoder interface {
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// Base64 implies T -> JSON -> RawURLEncodingBase64
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Base64() ([]byte, error)
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}
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// Base64Decode decodes a base64-encoded byte slice.
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func Base64Decode(b []byte) ([]byte, error) {
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buf := make([]byte, base64.RawURLEncoding.DecodedLen(len(b)))
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n, err := base64.RawURLEncoding.Decode(buf, b)
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return buf[:n], err
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}
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// Base64Encode encodes a byte slice.
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func Base64Encode(b []byte) []byte {
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buf := make([]byte, base64.RawURLEncoding.EncodedLen(len(b)))
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base64.RawURLEncoding.Encode(buf, b)
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return buf
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}
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// EncodeEscape base64-encodes a byte slice but escapes it for JSON.
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// It'll return the format: `"base64"`
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func EncodeEscape(b []byte) []byte {
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buf := make([]byte, base64.RawURLEncoding.EncodedLen(len(b))+2)
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buf[0] = '"'
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base64.RawURLEncoding.Encode(buf[1:], b)
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buf[len(buf)-1] = '"'
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return buf
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}
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// DecodeEscaped decodes a base64-encoded byte slice straight from a JSON
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// structure. It assumes it's in the format: `"base64"`, but can handle
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// cases where it's not.
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func DecodeEscaped(b []byte) ([]byte, error) {
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if len(b) > 1 && b[0] == '"' && b[len(b)-1] == '"' {
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b = b[1 : len(b)-1]
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}
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return Base64Decode(b)
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}
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