GNU R package for 'hash digest' of R data structures

 This package provides a function 'digest()' for the creation of hash
 digests of arbitrary R objects (using the md5, sha-1, sha-256 and
 crc32 algorithms) permitting easy comparison of R language objects,
 as well as a function 'hmac()' to create hash-based message
 authentication code.
 .
 The md5 algorithm by Ron Rivest is specified in RFC 1321, the SHA-1
 and SHA-256 algorithms are specified in FIPS-180-1 and FIPS-180-2,
 and the crc32 algorithm is described in
 ftp://ftp.rocksoft.com/cliens/rocksoft/papers/crc_v3.txt. For md5,
 sha-1 and sha-256, this package uses a small standalone
 implementations that were provided by Christophe Devine. For crc32,
 code from the zlib library is used.
 .
 Please note that this package is not meant to be deployed for
 cryptographic purposes for which more comprehensive (and widely
 tested) libraries such as OpenSSL should be used.