Module tink_core::cryptofmt

Provides constants and convenience methods that define the format of ciphertexts and signatures.

Constants

• LEGACY_PREFIX_SIZE
  Prefix size of legacy key types. The prefix starts with \x00 and followed by a 4-byte key id.
• LEGACY_START_BYTE
  First byte of the prefix of legacy key types.
• NON_RAW_PREFIX_SIZE
  Prefix size of Tink and Legacy key types.
• RAW_PREFIX
  Empty prefix for Raw key types.
• RAW_PREFIX_SIZE
  Prefix size of Raw key types. Raw prefix is empty.
• TINK_PREFIX_SIZE
  Prefix size of Tink key types. The prefix starts with \x01 and followed by a 4-byte key id.
• TINK_START_BYTE
  First byte of the prefix of Tink key types.

Functions

• output_prefix
  Generate the prefix of ciphertexts produced by the crypto primitive obtained from key. The prefix can be either empty (for RAW-type prefix), or consists of a 1-byte indicator of the type of the prefix, followed by 4 bytes of the key ID in big endian encoding.