Class BBDT16Mac

value

Static ReadonlymaxEncodedLength

Static ReadonlytextDecoder

Static ReadonlytextEncoder

bytes

• get bytes(): Uint8Array

• Return the wrapped bytearray

  Returns Uint8Array

hex

• get hex(): string

• Return the hex representation of the wrapped bytearray

  Returns string

length

• get length(): number

• Return the length of the wrapped bytearray

  Returns number

StaticencodeMessageForSigning

• encodeMessageForSigning(message): Uint8Array

• This is an irreversible encoding as a hash function is used to convert a message of arbitrary length to a fixed length encoding.

  Parameters

  • message: Uint8Array

  Returns Uint8Array

StaticencodeMessageForSigningConstantTime

• encodeMessageForSigningConstantTime(message): Uint8Array

• This is an irreversible encoding as a hash function is used to convert a message of arbitrary length to a fixed length encoding.

  Parameters

  • message: Uint8Array

  Returns Uint8Array

StaticencodePositiveNumberForSigning

• encodePositiveNumberForSigning(num): Uint8Array

• Encodes a positive safe integer, i.e. of 53 bits

  Parameters

  • num: number

  Returns Uint8Array

StaticfromBytes

• fromBytes(bytes): BytearrayWrapper

• Parameters

  • bytes: Uint8Array

  Returns BytearrayWrapper

StaticfromHex

• fromHex(hex): BytearrayWrapper

• Parameters

  • hex: string

  Returns BytearrayWrapper

StaticreversibleDecodeStringForSigning

• reversibleDecodeStringForSigning(message, decompress?): string

• Decode the given representation. This should only be used when the encoding was done using this.reversibleEncodeStringMessageForSigning. Also, this function trims any characters from the first occurrence of a null characters (UTF-16 code unit 0) so if the encoded (using this.reversibleEncodeStringMessageForSigning) string also had a null then the decoded string will be different from it.

  Parameters

  • message: Uint8Array
  • decompress: boolean = false

    whether to decompress the bytes before converting to a string

  Returns string

StaticreversibleEncodeStringForSigning

• reversibleEncodeStringForSigning(message, compress?): Uint8Array

• Encode the given string to bytes and create a field element by considering the bytes in little-endian format. Use this way of encoding only if the input string's UTF-8 representation is <= 32 bytes else this will throw an error. Also adds trailing 0s to the bytes to make the size 32 bytes so use this function carefully. The only place this is currently useful is verifiable encryption as in some cases the prover might not be willing/available at the time of decryption and thus the decryptor must be able to decrypt it independently. This is different from selective disclosure where the verifier can check that the revealed message is same as the encoded one before even verifying the proof.

  Parameters

  • message: string

    utf-8 string of at most 32 bytes
  • compress: boolean = false

    whether to compress the text before encoding to bytes. Compression might not always help as things like public keys, DIDs, UUIDs, etc. are designed to be random and thus won't be compressed

  Returns Uint8Array