README
¶
trivium
A simple golang implementation of the lightweight trivium stream cipher.
DISCLAIMER: This package is purely for fun and makes no claim or waranty of security. Do not use this package to encrypt any sensitive information.
Trivium is a light weight stream cipher developed to be particularly efficient in hardware.
The trivium specification is http://www.ecrypt.eu.org/stream/p3ciphers/trivium/trivium_p3.pdf
This is a straighforward implementation based on the specification using SWAR calculations to calculate up to 64 bits at a time.
Documentation
¶
Overview ¶
Package trivium is a simple implementation of the light weight stream cipher trivium.
DISCLAIMER: This package is purely for fun and makes no claim or waranty of security. Do not use this package to encrypt any sensitive information.
Trivium is a light weight stream cipher developed to be particularly efficient in hardware.
The trivium specification is http://www.ecrypt.eu.org/stream/p3ciphers/trivium/trivium_p3.pdf
This is a straighforward implementation based on the specification using SWAR calculations to calculate up to 64 bits at a time.
Index ¶
Examples ¶
Constants ¶
const (
// KeyLength bytes in the key and IV, 10 bytes = 80 bits
KeyLength = 10
)
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Trivium ¶
type Trivium struct {
// contains filtered or unexported fields
}
Trivium represents the 288-bit state of the Trivium cipher.
func NewTrivium ¶
NewTrivium returns a Trivium cipher initialized with key and initialization value (IV). Both the key and IV are 80-bits (10 bytes). The initialization processes the cipher for 4*288 cycles to "warm-up" and attempt to eliminate and usable dependency on key and IV.
Example ¶
var key = [10]byte{0x5F, 0xE5, 0x2A, 0x80, 0x75, 0xDA, 0x10, 0xAD, 0x46, 0xF0}
var iv = [10]byte{0xE3, 0x06, 0x9F, 0x49, 0xD4, 0x23, 0xBA, 0x6F, 0xF1, 0x14}
var trivium = NewTrivium(key, iv)
// note the key and iv are printed big-endian
fmt.Printf("key: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n", key[9], key[8], key[7], key[6], key[5], key[4], key[3], key[2], key[1], key[0])
fmt.Printf("iv: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n", iv[9], iv[8], iv[7], iv[6], iv[5], iv[4], iv[3], iv[2], iv[1], iv[0])
fmt.Println("first 64 bytes of key stream:")
for j := 0; j < 4; j++ {
for i := 0; i < 16; i++ {
fmt.Printf("%02X", trivium.NextByte())
}
fmt.Println()
}
Output: key: F046AD10DA75802AE55F iv: 14F16FBA23D4499F06E3 first 64 bytes of key stream: A4386C6D7624983FEA8DBE7314E5FE1F 9D102004C2CEC99AC3BFBF003A66433F 3089A98FAD8512C49D7AABC0639F90C5 FFED06F9D35AA8C86630E76A838E26D7
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