ActiveGo 1.8Package s2k
Overview ▹
Index ▹
func HashIdToHash ¶
func HashIdToHash(id byte) (h crypto.Hash, ok bool)
HashIdToHash returns a crypto.Hash which corresponds to the given OpenPGP hash id.
func HashIdToString ¶
func HashIdToString(id byte) (name string, ok bool)
HashIdToString returns the name of the hash function corresponding to the given OpenPGP hash id.
func HashToHashId ¶
func HashToHashId(h crypto.Hash) (id byte, ok bool)
HashIdToHash returns an OpenPGP hash id which corresponds the given Hash.
func Iterated ¶
func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int)
Iterated writes to out the result of computing the Iterated and Salted S2K function (RFC 4880, section 3.7.1.3) using the given hash, input passphrase, salt and iteration count.
func Parse ¶
func Parse(r io.Reader) (f func(out, in []byte), err error)
Parse reads a binary specification for a string-to-key transformation from r and returns a function which performs that transform.
func Salted ¶
func Salted(out []byte, h hash.Hash, in []byte, salt []byte)
Salted writes to out the result of computing the Salted S2K function (RFC 4880, section 3.7.1.2) using the given hash, input passphrase and salt.
func Serialize ¶
func Serialize(w io.Writer, key []byte, rand io.Reader, passphrase []byte, c *Config) error
Serialize salts and stretches the given passphrase and writes the resulting key into key. It also serializes an S2K descriptor to w. The key stretching can be configured with c, which may be nil. In that case, sensible defaults will be used.
func Simple ¶
func Simple(out []byte, h hash.Hash, in []byte)
Simple writes to out the result of computing the Simple S2K function (RFC 4880, section 3.7.1.1) using the given hash and input passphrase.
type Config ¶
Config collects configuration parameters for s2k key-stretching transformatioms. A nil *Config is valid and results in all default values. Currently, Config is used only by the Serialize function in this package.
type Config struct {
// Hash is the default hash function to be used. If
// nil, SHA1 is used.
Hash crypto.Hash
// S2KCount is only used for symmetric encryption. It
// determines the strength of the passphrase stretching when
// the said passphrase is hashed to produce a key. S2KCount
// should be between 1024 and 65011712, inclusive. If Config
// is nil or S2KCount is 0, the value 65536 used. Not all
// values in the above range can be represented. S2KCount will
// be rounded up to the next representable value if it cannot
// be encoded exactly. When set, it is strongly encrouraged to
// use a value that is at least 65536. See RFC 4880 Section
// 3.7.1.3.
S2KCount int
}