Encode a ByteString value as Base64 Text with padding.

See: RFC-4648 section 4

Examples:

>>> encodeBase64 "Sun"
"U3Vu"

Encode a ByteString value as a Base64 ByteString value with padding.

See: RFC-4648 section 4

Examples:

>>> encodeBase64' "Sun"
"U3Vu"

Decode a padded Base64-encoded ByteString value.

See: RFC-4648 section 4

Examples:

>>> decodeBase64 $ assertBase64 @'StdPadded "U3Vu"
"Sun"

Decode a padded untyped Base64-encoded ByteString value.

See: RFC-4648 section 4

Examples:

>>> decodeBase64Untyped "U3Vu"
Right "Sun"

>>> decodeBase64Untyped "U3V"
Left "Base64-encoded bytestring requires padding"

>>> decodeBase64Untyped "U3V="
Left "non-canonical encoding detected at offset: 2"

Leniently decode an unpadded Base64-encoded ByteString value. This function will not generate parse errors. If input data contains padding chars, then the input will be parsed up until the first pad character.

Note: This is not RFC 4648-compliant.

Examples:

>>> decodeBase64Lenient "U3Vu"
"Sun"

>>> decodeBase64Lenient "U3V"
"Su"

>>> decodeBase64Lenient "U3V="
"Su"

Parse a canonical, padded Base64-encoded ByteString value.

Checks the alphabet, length, padding, and unused padding bits. On success, returns the original encoded value wrapped in Base64, ready for decodeBase64. On failure, returns the same error as decodeBase64Untyped. The input is neither decoded nor normalized in the returned value.

The entire input is validated before returning Right; the original chunk boundaries are preserved in the result.

Examples:

>>> parseBase64 "U3Vu"
Right "U3Vu"

>>> fmap decodeBase64 (parseBase64 "U3Vu")
Right "Sun"

>>> parseBase64 "U3V"
Left "Base64-encoded bytestring requires padding"

>>> parseBase64 "U3V="
Left "non-canonical encoding detected at offset: 2"

Since: 2.0