common

package
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 Go to latest Published: May 4, 2019 License: GPL-3.0, GPL-3.0 Imports: 37 Imported by: 0

Documentation

Index

Constants

View Source 
const RFC3339Milli = "2006-01-02T15:04:05.000Z07:00"

Variables

This section is empty.

Functions

func Compress 

func Compress(data []byte) []byte

Compress returns zlib compressed data

func Contains 

func Contains(list []string, target string) bool

Contains is a helper function that returns true if the target string is in the list.

func ContainsAny 

func ContainsAny(list, targets []string) bool

ContainsAny returns true if any string in targets is present in the list.

func ContainsInt 

func ContainsInt(list []int, target int) bool

ContainsInt returns true if the target int is in the list.

func ContainsWildcard 

func ContainsWildcard(patterns []string, target string) bool

ContainsWildcard returns true if target matches any of the patterns. Patterns may contain the '*' wildcard.

func ContextError 

func ContextError(err error) error

ContextError prefixes an error message with the current function name and source file line number.

func ContextErrorMsg 

func ContextErrorMsg(err error, message string) error

ContextErrorMsg works like ContextError, but adds a message string to the error message.

func CopyNBuffer 

func CopyNBuffer(dst io.Writer, src io.Reader, n int64, buf []byte) (written int64, err error)

func Decompress 

func Decompress(data []byte) ([]byte, error)

Decompress returns zlib decompressed data

func FormatByteCount 

func FormatByteCount(bytes uint64) string

FormatByteCount returns a string representation of the specified byte count in conventional, human-readable format.

func GenerateAuthenticatedDataPackageKeys 

func GenerateAuthenticatedDataPackageKeys() (string, string, error)

GenerateAuthenticatedDataPackageKeys generates a key pair be used to sign and verify AuthenticatedDataPackages.

func GenerateHostName 

func GenerateHostName() string

func GenerateWebServerCertificate 

func GenerateWebServerCertificate(commonName string) (string, string, error)

GenerateWebServerCertificate creates a self-signed web server certificate, using the specified host name (commonName). This is primarily intended for use by MeekServer to generate on-the-fly, self-signed TLS certificates for fronted HTTPS mode. In this case, the nature of the certificate is non-circumvention; it only has to be acceptable to the front CDN making connections to meek. The same certificates are used for unfronted HTTPS meek. In this case, the certificates may be a fingerprint used to detect Psiphon servers or traffic. TODO: more effort to mitigate fingerprinting these certificates.

In addition, GenerateWebServerCertificate is used by GenerateConfig to create Psiphon web server certificates for test/example configurations. If these Psiphon web server certificates are used in production, the same caveats about fingerprints apply.

func GetCurrentTimestamp 

func GetCurrentTimestamp() string

GetCurrentTimestamp returns the current time in UTC as an RFC 3339 formatted string.

func GetInterfaceIPAddresses 

func GetInterfaceIPAddresses(interfaceName string) (net.IP, net.IP, error)

GetInterfaceIPAddresses takes an interface name, such as "eth0", and returns the first IPv4 and IPv6 addresses associated with it. Either of the IPv4 or IPv6 address may be nil. If neither type of address is found, an error is returned.

func GetParentContext 

func GetParentContext() string

GetParentContext returns the parent function name and source file line number.

func GetStringSlice 

func GetStringSlice(value interface{}) ([]string, bool)

GetStringSlice converts an interface{} which is of type []interace{}, and with the type of each element a string, to []string.

func IPAddressFromAddr 

func IPAddressFromAddr(addr net.Addr) string

IPAddressFromAddr is a helper which extracts an IP address from a net.Addr or returns "" if there is no IP address.

func MakeSecureRandomBytes 

func MakeSecureRandomBytes(length int) ([]byte, error)

MakeSecureRandomBytes is a helper function that wraps crypto/rand.Read.

func NewAuthenticatedDataPackageReader 

func NewAuthenticatedDataPackageReader(
	dataPackage io.ReadSeeker, signingPublicKey string) (io.Reader, error)

NewAuthenticatedDataPackageReader extracts and verifies authenticated data from an AuthenticatedDataPackage stored in the specified file. The package must have been signed with the given key. NewAuthenticatedDataPackageReader does not load the entire package nor the entire data into memory. It streams the package while verifying, and returns an io.Reader that the caller may use to stream the authenticated data payload.

func ReadAuthenticatedDataPackage 

func ReadAuthenticatedDataPackage(
	dataPackage []byte, isCompressed bool, signingPublicKey string) (string, error)

ReadAuthenticatedDataPackage extracts and verifies authenticated data from an AuthenticatedDataPackage. The package must have been signed with the given key.

Set isCompressed to false to read packages that are not compressed.

func RegisterHostNameGenerator 

func RegisterHostNameGenerator(generator func() string)

func TerminateHTTPConnection 

func TerminateHTTPConnection(
	responseWriter http.ResponseWriter, request *http.Request)

TerminateHTTPConnection sends a 404 response to a client and also closes the persistent connection.

func TruncateTimestampToHour 

func TruncateTimestampToHour(timestamp string) string

TruncateTimestampToHour truncates an RFC 3339 formatted string to hour granularity. If the input is not a valid format, the result is "".

func WriteAuthenticatedDataPackage 

func WriteAuthenticatedDataPackage(
	data string, signingPublicKey, signingPrivateKey string) ([]byte, error)

WriteAuthenticatedDataPackage creates an AuthenticatedDataPackage containing the specified data and signed by the given key. The output conforms with the legacy format here: https://bitbucket.org/psiphon/psiphon-circumvention-system/src/c25d080f6827b141fe637050ce0d5bd0ae2e9db5/Automation/psi_ops_crypto_tools.py

func WriteRuntimeProfiles 

func WriteRuntimeProfiles(
	logger Logger,
	outputDirectory string,
	filenameSuffix string,
	blockSampleDurationSeconds int,
	cpuSampleDurationSeconds int)

WriteRuntimeProfiles writes Go runtime profile information to a set of files in the specified output directory. The profiles include "heap", "goroutine", and other selected profiles from: https://golang.org/pkg/runtime/pprof/#Profile.

The SampleDurationSeconds inputs determine how long to wait and sample profiles that require active sampling. When set to 0, these profiles are skipped.

Types

type APIParameterLogFieldFormatter 

type APIParameterLogFieldFormatter func(GeoIPData, APIParameters) LogFields

APIParameterLogFieldFormatter is a function that returns formatted LogFields containing the given GeoIPData and APIParameters.

type APIParameterValidator 

type APIParameterValidator func(APIParameters) error

APIParameterValidator is a function that validates API parameters for a particular request or context.

type APIParameters 

type APIParameters map[string]interface{}

APIParameters is a set of API parameter values, typically received from a Psiphon client and used/logged by the Psiphon server. The values are of varying types: strings, ints, arrays, structs, etc.

type ActivityMonitoredConn 

type ActivityMonitoredConn struct {
	net.Conn
	// contains filtered or unexported fields
}

ActivityMonitoredConn wraps a net.Conn, adding logic to deal with events triggered by I/O activity.

When an inactivity timeout is specified, the network I/O will timeout after the specified period of read inactivity. Optionally, for the purpose of inactivity only, ActivityMonitoredConn will also consider the connection active when data is written to it.

When a LRUConnsEntry is specified, then the LRU entry is promoted on either a successful read or write.

When an ActivityUpdater is set, then its UpdateActivity method is called on each read and write with the number of bytes transferred. The durationNanoseconds, which is the time since the last read, is reported only on reads.

func NewActivityMonitoredConn 

func NewActivityMonitoredConn(
	conn net.Conn,
	inactivityTimeout time.Duration,
	activeOnWrite bool,
	activityUpdater ActivityUpdater,
	lruEntry *LRUConnsEntry) (*ActivityMonitoredConn, error)

NewActivityMonitoredConn creates a new ActivityMonitoredConn.

func (*ActivityMonitoredConn) GetActiveDuration 

func (conn *ActivityMonitoredConn) GetActiveDuration() time.Duration

GetActiveDuration returns the time elapsed between the initialization of the ActivityMonitoredConn and the last Read. Only reads are used for this calculation since writes may succeed locally due to buffering.

func (*ActivityMonitoredConn) GetLastActivityMonotime 

func (conn *ActivityMonitoredConn) GetLastActivityMonotime() monotime.Time

GetLastActivityMonotime returns the arbitrary monotonic time of the last Read.

func (*ActivityMonitoredConn) GetStartTime 

func (conn *ActivityMonitoredConn) GetStartTime() time.Time

GetStartTime gets the time when the ActivityMonitoredConn was initialized. Reported time is UTC.

func (*ActivityMonitoredConn) IsClosed 

func (conn *ActivityMonitoredConn) IsClosed() bool

IsClosed implements the Closer iterface. The return value indicates whether the underlying conn has been closed.

func (*ActivityMonitoredConn) Read 

func (conn *ActivityMonitoredConn) Read(buffer []byte) (int, error)

func (*ActivityMonitoredConn) Write 

func (conn *ActivityMonitoredConn) Write(buffer []byte) (int, error)

type ActivityUpdater 

type ActivityUpdater interface {
	UpdateProgress(bytesRead, bytesWritten int64, durationNanoseconds int64)
}

ActivityUpdater defines an interface for receiving updates for ActivityMonitoredConn activity. Values passed to UpdateProgress are bytes transferred and conn duration since the previous UpdateProgress.

type AuthenticatedDataPackage 

type AuthenticatedDataPackage struct {
	Data                   string `json:"data"`
	SigningPublicKeyDigest []byte `json:"signingPublicKeyDigest"`
	Signature              []byte `json:"signature"`
}

AuthenticatedDataPackage is a JSON record containing some Psiphon data payload, such as list of Psiphon server entries. As it may be downloaded from various sources, it is digitally signed so that the data may be authenticated.

type BuildInfo 

type BuildInfo struct {
	BuildDate       string          `json:"buildDate"`
	BuildRepo       string          `json:"buildRepo"`
	BuildRev        string          `json:"buildRev"`
	GoVersion       string          `json:"goVersion"`
	GomobileVersion string          `json:"gomobileVersion,omitempty"`
	Dependencies    json.RawMessage `json:"dependencies"`
}

BuildInfo captures relevant build information here for use in clients or servers

func GetBuildInfo 

func GetBuildInfo() *BuildInfo

GetBuildInfo returns an instance of the BuildInfo struct

func (*BuildInfo) ToMap 

func (bi *BuildInfo) ToMap() *map[string]interface{}

ToMap converts 'BuildInfo' struct to 'map[string]interface{}'

type CloseWriter 

type CloseWriter interface {
	CloseWrite() error
}

CloseWriter defines the interface to a type, typically a net.TCPConn, that implements CloseWrite.

type Closer 

type Closer interface {
	IsClosed() bool
}

Closer defines the interface to a type, typically a net.Conn, that can be closed.

type Conns 

type Conns struct {
	// contains filtered or unexported fields
}

Conns is a synchronized list of Conns that is used to coordinate interrupting a set of goroutines establishing connections, or close a set of open connections, etc. Once the list is closed, no more items may be added to the list (unless it is reset).

func NewConns 

func NewConns() *Conns

NewConns initializes a new Conns.

func (*Conns) Add 

func (conns *Conns) Add(conn net.Conn) bool

func (*Conns) CloseAll 

func (conns *Conns) CloseAll()

func (*Conns) Remove 

func (conns *Conns) Remove(conn net.Conn)

func (*Conns) Reset 

func (conns *Conns) Reset()

type GeoIPData 

type GeoIPData struct {
	Country        string
	City           string
	ISP            string
	DiscoveryValue int
}

GeoIPData is type-compatible with psiphon/server.GeoIPData.

type LRUConns 

type LRUConns struct {
	// contains filtered or unexported fields
}

LRUConns is a concurrency-safe list of net.Conns ordered by recent activity. Its purpose is to facilitate closing the oldest connection in a set of connections.

New connections added are referenced by a LRUConnsEntry, which is used to Touch() active connections, which promotes them to the front of the order and to Remove() connections that are no longer LRU candidates.

CloseOldest() will remove the oldest connection from the list and call net.Conn.Close() on the connection.

After an entry has been removed, LRUConnsEntry Touch() and Remove() will have no effect.

func NewLRUConns 

func NewLRUConns() *LRUConns

NewLRUConns initializes a new LRUConns.

func (*LRUConns) Add 

func (conns *LRUConns) Add(conn net.Conn) *LRUConnsEntry

Add inserts a net.Conn as the freshest connection in a LRUConns and returns an LRUConnsEntry to be used to freshen the connection or remove the connection from the LRU list.

func (*LRUConns) CloseOldest 

func (conns *LRUConns) CloseOldest()

CloseOldest closes the oldest connection in a LRUConns. It calls net.Conn.Close() on the connection.

type LRUConnsEntry 

type LRUConnsEntry struct {
	// contains filtered or unexported fields
}

LRUConnsEntry is an entry in a LRUConns list.

func (*LRUConnsEntry) Remove 

func (entry *LRUConnsEntry) Remove()

Remove deletes the connection referenced by the LRUConnsEntry from the associated LRUConns. Has no effect if the entry was not initialized or previously removed.

func (*LRUConnsEntry) Touch 

func (entry *LRUConnsEntry) Touch()

Touch promotes the connection referenced by the LRUConnsEntry to the front of the associated LRUConns. Has no effect if the entry was not initialized or previously removed.

type LogContext 

type LogContext interface {
	Debug(args ...interface{})
	Info(args ...interface{})
	Warning(args ...interface{})
	Error(args ...interface{})
}

LogContext is interface-compatible with the return values from psiphon/server.ContextLogger.WithContext/WithContextFields.

type LogFields 

type LogFields map[string]interface{}

LogFields is type-compatible with psiphon/server.LogFields and logrus.LogFields.

type Logger 

type Logger interface {
	WithContext() LogContext
	WithContextFields(fields LogFields) LogContext
	LogMetric(metric string, fields LogFields)
}

Logger exposes a logging interface that's compatible with psiphon/server.ContextLogger. This interface allows packages to implement logging that will integrate with psiphon/server without importing that package. Other implementations of Logger may also be provided.

type MetricsSource 

type MetricsSource interface {

	// GetMetrics returns a LogFields populated with
	// metrics from the MetricsSource
	GetMetrics() LogFields
}

MetricsSource is an object that provides metrics to be logged

type NetDialer 

type NetDialer interface {
	Dial(network, address string) (net.Conn, error)
	DialContext(ctx context.Context, network, address string) (net.Conn, error)
}

NetDialer mimicks the net.Dialer interface.

type RateLimits 

type RateLimits struct {

	// ReadUnthrottledBytes specifies the number of bytes to
	// read, approximately, before starting rate limiting.
	ReadUnthrottledBytes int64

	// ReadBytesPerSecond specifies a rate limit for read
	// data transfer. The default, 0, is no limit.
	ReadBytesPerSecond int64

	// WriteUnthrottledBytes specifies the number of bytes to
	// write, approximately, before starting rate limiting.
	WriteUnthrottledBytes int64

	// WriteBytesPerSecond specifies a rate limit for write
	// data transfer. The default, 0, is no limit.
	WriteBytesPerSecond int64

	// CloseAfterExhausted indicates that the underlying
	// net.Conn should be closed once either the read or
	// write unthrottled bytes have been exhausted. In this
	// case, throttling is never applied.
	CloseAfterExhausted bool
}

RateLimits specify the rate limits for a ThrottledConn.

type ReloadableFile 

type ReloadableFile struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

ReloadableFile is a file-backed Reloader. This type is intended to be embedded in other types that add the actual reloadable data structures.

ReloadableFile has a multi-reader mutex for synchronization. Its Reload() function will obtain a write lock before reloading the data structures. The actual reloading action is to be provided via the reloadAction callback, which receives the content of reloaded files and must process the new data (for example, unmarshall the contents into data structures). All read access to the data structures should be guarded by RLocks on the ReloadableFile mutex.

reloadAction must ensure that data structures revert to their previous state when a reload fails.

func NewReloadableFile 

func NewReloadableFile(
	filename string,
	loadFileContent bool,
	reloadAction func([]byte) error) ReloadableFile

NewReloadableFile initializes a new ReloadableFile.

When loadFileContent is true, the file content is loaded and passed to reloadAction; otherwise, reloadAction receives a nil argument and is responsible for loading the file. The latter option allows for cases where the file contents must be streamed, memory mapped, etc.

func (*ReloadableFile) LogDescription 

func (reloadable *ReloadableFile) LogDescription() string

func (*ReloadableFile) Reload 

func (reloadable *ReloadableFile) Reload() (bool, error)

Reload checks if the underlying file has changed and, when changed, invokes the reloadAction callback which should reload the in-memory data structures.

In some case (e.g., traffic rules and OSL), there are penalties associated with proceeding with reload, so care is taken to not invoke the reload action unless the contents have changed.

The file content is loaded and a checksum is taken to determine whether it has changed. Neither file size (may not change when content changes) nor modified date (may change when identical file is repaved) is a sufficient indicator.

All data structure readers should be blocked by the ReloadableFile mutex.

Reload must not be called from multiple concurrent goroutines.

func (*ReloadableFile) WillReload 

func (reloadable *ReloadableFile) WillReload() bool

WillReload indicates whether the ReloadableFile is capable of reloading.

type Reloader 

type Reloader interface {

	// Reload reloads the data object. Reload returns a flag indicating if the
	// reloadable target has changed and reloaded or remains unchanged. By
	// convention, when reloading fails the Reloader should revert to its previous
	// in-memory state.
	Reload() (bool, error)

	// WillReload indicates if the data object is capable of reloading.
	WillReload() bool

	// LogDescription returns a description to be used for logging
	// events related to the Reloader.
	LogDescription() string
}

Reloader represents a read-only, in-memory reloadable data object. For example, a JSON data file that is loaded into memory and accessed for read-only lookups; and from time to time may be reloaded from the same file, updating the memory copy.

type SubnetLookup 

type SubnetLookup []net.IPNet

SubnetLookup provides an efficient lookup for individual IPv4 addresses within a list of subnets.

func NewSubnetLookup 

func NewSubnetLookup(CIDRs []string) (SubnetLookup, error)

NewSubnetLookup creates a SubnetLookup from a list of subnet CIDRs.

func NewSubnetLookupFromRoutes 

func NewSubnetLookupFromRoutes(routesData []byte) (SubnetLookup, error)

NewSubnetLookupFromRoutes creates a SubnetLookup from text routes data. The input format is expected to be text lines where each line is, e.g., "1.2.3.0\t255.255.255.0\n"

func (SubnetLookup) ContainsIPAddress 

func (lookup SubnetLookup) ContainsIPAddress(addr net.IP) bool

ContainsIPAddress performs a binary search on the sorted subnet list to find a network containing the candidate IP address.

func (SubnetLookup) Len 

func (lookup SubnetLookup) Len() int

Len implements Sort.Interface

func (SubnetLookup) Less 

func (lookup SubnetLookup) Less(i, j int) bool

Less implements Sort.Interface

func (SubnetLookup) Swap 

func (lookup SubnetLookup) Swap(i, j int)

Swap implements Sort.Interface

type ThrottledConn 

type ThrottledConn struct {
	net.Conn
	// contains filtered or unexported fields
}

ThrottledConn wraps a net.Conn with read and write rate limiters. Rates are specified as bytes per second. Optional unlimited byte counts allow for a number of bytes to read or write before applying rate limiting. Specify limit values of 0 to set no rate limit (unlimited counts are ignored in this case). The underlying rate limiter uses the token bucket algorithm to calculate delay times for read and write operations.

func NewThrottledConn 

func NewThrottledConn(conn net.Conn, limits RateLimits) *ThrottledConn

NewThrottledConn initializes a new ThrottledConn.

func (*ThrottledConn) Read 

func (conn *ThrottledConn) Read(buffer []byte) (int, error)

func (*ThrottledConn) SetLimits 

func (conn *ThrottledConn) SetLimits(limits RateLimits)

SetLimits modifies the rate limits of an existing ThrottledConn. It is safe to call SetLimits while other goroutines are calling Read/Write. This function will not block, and the new rate limits will be applied within Read/Write, but not necessarily until some further I/O at previous rates.

func (*ThrottledConn) Write 

func (conn *ThrottledConn) Write(buffer []byte) (int, error)

Source Files

View all Source files

Directories

Path Synopsis
Package accesscontrol implements an access control authorization scheme based on digital signatures.
 Package accesscontrol implements an access control authorization scheme based on digital signatures.
crypto
acme
Package acme provides an implementation of the Automatic Certificate Management Environment (ACME) spec.
 Package acme provides an implementation of the Automatic Certificate Management Environment (ACME) spec.
acme/autocert/internal/acmetest
Package acmetest provides types for testing acme and autocert packages.
 Package acmetest provides types for testing acme and autocert packages.
argon2
Package argon2 implements the key derivation function Argon2.
 Package argon2 implements the key derivation function Argon2.
bcrypt
Package bcrypt implements Provos and Mazières's bcrypt adaptive hashing algorithm.
 Package bcrypt implements Provos and Mazières's bcrypt adaptive hashing algorithm.
blake2b
Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb.
 Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb.
blake2s
Package blake2s implements the BLAKE2s hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xs.
 Package blake2s implements the BLAKE2s hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xs.
blowfish
Package blowfish implements Bruce Schneier's Blowfish encryption algorithm.
 Package blowfish implements Bruce Schneier's Blowfish encryption algorithm.
bn256
Package bn256 implements a particular bilinear group.
 Package bn256 implements a particular bilinear group.
cast5
Package cast5 implements CAST5, as defined in RFC 2144.
 Package cast5 implements CAST5, as defined in RFC 2144.
chacha20poly1305
Package chacha20poly1305 implements the ChaCha20-Poly1305 AEAD as specified in RFC 7539, and its extended nonce variant XChaCha20-Poly1305.
 Package chacha20poly1305 implements the ChaCha20-Poly1305 AEAD as specified in RFC 7539, and its extended nonce variant XChaCha20-Poly1305.
cryptobyte
Package cryptobyte contains types that help with parsing and constructing length-prefixed, binary messages, including ASN.1 DER.
 Package cryptobyte contains types that help with parsing and constructing length-prefixed, binary messages, including ASN.1 DER.
cryptobyte/asn1
Package asn1 contains supporting types for parsing and building ASN.1 messages with the cryptobyte package.
 Package asn1 contains supporting types for parsing and building ASN.1 messages with the cryptobyte package.
curve25519
Package curve25519 provides an implementation of scalar multiplication on the elliptic curve known as curve25519.
 Package curve25519 provides an implementation of scalar multiplication on the elliptic curve known as curve25519.
ed25519
Package ed25519 implements the Ed25519 signature algorithm.
 Package ed25519 implements the Ed25519 signature algorithm.
ed25519/internal/edwards25519
hkdf
Package hkdf implements the HMAC-based Extract-and-Expand Key Derivation Function (HKDF) as defined in RFC 5869.
 Package hkdf implements the HMAC-based Extract-and-Expand Key Derivation Function (HKDF) as defined in RFC 5869.
internal/chacha20
Package ChaCha20 implements the core ChaCha20 function as specified in https://tools.ietf.org/html/rfc7539#section-2.3.
 Package ChaCha20 implements the core ChaCha20 function as specified in https://tools.ietf.org/html/rfc7539#section-2.3.
internal/subtle
Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly.
 Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly.
md4
Package md4 implements the MD4 hash algorithm as defined in RFC 1320.
 Package md4 implements the MD4 hash algorithm as defined in RFC 1320.
nacl/auth
Package auth authenticates a message using a secret key.
 Package auth authenticates a message using a secret key.
nacl/box
Package box authenticates and encrypts small messages using public-key cryptography.
 Package box authenticates and encrypts small messages using public-key cryptography.
nacl/secretbox
Package secretbox encrypts and authenticates small messages.
 Package secretbox encrypts and authenticates small messages.
nacl/sign
Package sign signs small messages using public-key cryptography.
 Package sign signs small messages using public-key cryptography.
ocsp
Package ocsp parses OCSP responses as specified in RFC 2560.
 Package ocsp parses OCSP responses as specified in RFC 2560.
openpgp
Package openpgp implements high level operations on OpenPGP messages.
 Package openpgp implements high level operations on OpenPGP messages.
openpgp/armor
Package armor implements OpenPGP ASCII Armor, see RFC 4880.
 Package armor implements OpenPGP ASCII Armor, see RFC 4880.
openpgp/clearsign
Package clearsign generates and processes OpenPGP, clear-signed data.
 Package clearsign generates and processes OpenPGP, clear-signed data.
openpgp/elgamal
Package elgamal implements ElGamal encryption, suitable for OpenPGP, as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms," IEEE Transactions on Information Theory, v.
 Package elgamal implements ElGamal encryption, suitable for OpenPGP, as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms," IEEE Transactions on Information Theory, v.
openpgp/errors
Package errors contains common error types for the OpenPGP packages.
 Package errors contains common error types for the OpenPGP packages.
openpgp/packet
Package packet implements parsing and serialization of OpenPGP packets, as specified in RFC 4880.
 Package packet implements parsing and serialization of OpenPGP packets, as specified in RFC 4880.
openpgp/s2k
Package s2k implements the various OpenPGP string-to-key transforms as specified in RFC 4800 section 3.7.1.
 Package s2k implements the various OpenPGP string-to-key transforms as specified in RFC 4800 section 3.7.1.
otr
Package otr implements the Off The Record protocol as specified in http://www.cypherpunks.ca/otr/Protocol-v2-3.1.0.html
 Package otr implements the Off The Record protocol as specified in http://www.cypherpunks.ca/otr/Protocol-v2-3.1.0.html
pbkdf2
Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC 2898 / PKCS #5 v2.0.
 Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC 2898 / PKCS #5 v2.0.
pkcs12
Package pkcs12 implements some of PKCS#12.
 Package pkcs12 implements some of PKCS#12.
pkcs12/internal/rc2
Package rc2 implements the RC2 cipher
 Package rc2 implements the RC2 cipher
poly1305
Package poly1305 implements Poly1305 one-time message authentication code as specified in https://cr.yp.to/mac/poly1305-20050329.pdf.
 Package poly1305 implements Poly1305 one-time message authentication code as specified in https://cr.yp.to/mac/poly1305-20050329.pdf.
ripemd160
Package ripemd160 implements the RIPEMD-160 hash algorithm.
 Package ripemd160 implements the RIPEMD-160 hash algorithm.
salsa20
Package salsa20 implements the Salsa20 stream cipher as specified in https://cr.yp.to/snuffle/spec.pdf.
 Package salsa20 implements the Salsa20 stream cipher as specified in https://cr.yp.to/snuffle/spec.pdf.
salsa20/salsa
Package salsa provides low-level access to functions in the Salsa family.
 Package salsa provides low-level access to functions in the Salsa family.
scrypt
Package scrypt implements the scrypt key derivation function as defined in Colin Percival's paper "Stronger Key Derivation via Sequential Memory-Hard Functions" (https://www.tarsnap.com/scrypt/scrypt.pdf).
 Package scrypt implements the scrypt key derivation function as defined in Colin Percival's paper "Stronger Key Derivation via Sequential Memory-Hard Functions" (https://www.tarsnap.com/scrypt/scrypt.pdf).
sha3
Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.
 Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202.
ssh
Package ssh implements an SSH client and server.
 Package ssh implements an SSH client and server.
ssh/agent
Package agent implements the ssh-agent protocol, and provides both a client and a server.
 Package agent implements the ssh-agent protocol, and provides both a client and a server.
ssh/knownhosts
Package knownhosts implements a parser for the OpenSSH known_hosts host key database, and provides utility functions for writing OpenSSH compliant known_hosts files.
 Package knownhosts implements a parser for the OpenSSH known_hosts host key database, and provides utility functions for writing OpenSSH compliant known_hosts files.
ssh/terminal
Package terminal provides support functions for dealing with terminals, as commonly found on UNIX systems.
 Package terminal provides support functions for dealing with terminals, as commonly found on UNIX systems.
ssh/test
Package test contains integration tests for the github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/ssh package.
 Package test contains integration tests for the github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/crypto/ssh package.
tea
Package tea implements the TEA algorithm, as defined in Needham and Wheeler's 1994 technical report, “TEA, a Tiny Encryption Algorithm”.
 Package tea implements the TEA algorithm, as defined in Needham and Wheeler's 1994 technical report, “TEA, a Tiny Encryption Algorithm”.
twofish
Package twofish implements Bruce Schneier's Twofish encryption algorithm.
 Package twofish implements Bruce Schneier's Twofish encryption algorithm.
xtea
Package xtea implements XTEA encryption, as defined in Needham and Wheeler's 1997 technical report, "Tea extensions."
 Package xtea implements XTEA encryption, as defined in Needham and Wheeler's 1997 technical report, "Tea extensions."
xts
Package xts implements the XTS cipher mode as specified in IEEE P1619/D16.
 Package xts implements the XTS cipher mode as specified in IEEE P1619/D16.
osl
Package osl implements the Obfuscated Server List (OSL) mechanism.
 Package osl implements the Obfuscated Server List (OSL) mechanism.
paver
Package parameters implements dynamic, concurrency-safe parameters that determine Psiphon client behavior.
 Package parameters implements dynamic, concurrency-safe parameters that determine Psiphon client behavior.
Package prng implements a seeded, unbiased PRNG that is suitable for use cases including obfuscation, network jitter, load balancing.
 Package prng implements a seeded, unbiased PRNG that is suitable for use cases including obfuscation, network jitter, load balancing.
Package quic wraps github.com/lucas-clemente/quic-go with net.Listener and net.Conn types that provide a drop-in replacement for net.TCPConn.
 Package quic wraps github.com/lucas-clemente/quic-go with net.Listener and net.Conn types that provide a drop-in replacement for net.TCPConn.
Package sss implements Shamir's Secret Sharing algorithm over GF(2^8).
 Package sss implements Shamir's Secret Sharing algorithm over GF(2^8).
Package tactics provides dynamic Psiphon client configuration based on GeoIP attributes, API parameters, and speed test data.
 Package tactics provides dynamic Psiphon client configuration based on GeoIP attributes, API parameters, and speed test data.
Package tun is an IP packet tunnel server and client.
 Package tun is an IP packet tunnel server and client.
Package wildcard implements a very simple wildcard matcher which supports only the term '*', which matches any sequence of characters.
 Package wildcard implements a very simple wildcard matcher which supports only the term '*', which matches any sequence of characters.

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