BloombergLP::bslh::SipHashAlgorithm

Name

Description

result_type

Typedef indicating the value type returned by this algorithm.

Name

Description

Unnamed enum

Compile‐time constants for the SipHash algorithm.

Name

Description

SipHashAlgorithm [constructor]

Create a bslh::SipHashAlgorithm, seeded with a 128‐bit (k_SEED_LENGTH bytes) seed pointed to by the specified seed. Each bit of the supplied seed will contribute to the final hash produced by computeHash(). The behaviour is undefined unless seed points to at least 16 bytes of initialized memory. Note that if data in seed is not random, all guarantees of security and Denial of Service (DoS) protection are void.

computeHash

Return the finalized version of the hash that has been accumulated. Note that this changes the internal state of the object, so calling computeHash() multiple times in a row will return different results, and only the first result returned will match the expected result of the algorithm. Also note that a value will be returned, even if data has not been passed into operator()

operator()

Incorporate the specified data, of at least the specified numBytes, into the internal state of the hashing algorithm. Every bit of data incorporated into the internal state of the algorithm will contribute to the final hash produced by computeHash(). The same hash will be produced regardless of whether a sequence of bytes is passed in all at once or through multiple calls to this member function. Input where numBytes is 0 will have no effect on the internal state of the algorithm. The behaviour is undefined unless data points to a valid memory location with at least numBytes bytes of initialized memory.

Name

Description

d_alignment [variant member]

Ensures proper alignment for buffered data.

d_buf [variant member]

Used to buffer data until we have enough to do a full round of computation as specified by the algorithm.