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package structs
import (
"fmt"
)
type Ciphertext struct {
Text string // the CipherText
FrequencyMap map[string]int // frequency map
BiGrams map[string]int // frequency map
cipher []string // list of ciphers that were applied to get this payload
}
// RotAll rotates the given ciphertext for all possile rotations
func (CiphertextVar Ciphertext) DecodeRotN(mainChannel chan Ciphertext) {
// Calculate the new ciphertext for all rotations and push the result into the channel
for i := 0; i < 26; i++ {
CiphertextVar.Rot(i, mainChannel)
}
}
// Rot rotates a ciphertext n units in one direction
func (CiphertextVar Ciphertext) Rot(n int, mainChannel chan Ciphertext) {
// Length of the given ciphertext
var CiphertextLength int = len(CiphertextVar.Text)
var RotatedText string
// Iterate over all the chars in the ciphertext and shift them by i units circular
for i := 0; i < CiphertextLength; i++ {
// Handle uppercase characters
if 65 < int(CiphertextVar.Text[i]) == true && (int(CiphertextVar.Text[i])) < 90 == true {
var newChar = (((int(CiphertextVar.Text[i]) + n) - 65) % 26) + 65
RotatedText += string(newChar)
}
// Handle lowercase characters
if 97 < int(CiphertextVar.Text[i]) == true && (int(CiphertextVar.Text[i])) < 122 == true {
var newChar = (((int(CiphertextVar.Text[i]) + n) - 97) % 26) + 97
RotatedText += string(newChar)
}
}
// Convert the RotatedText string into a Ciphertext struct
RotatedCipherStruct := Ciphertext{
Text: RotatedText,
FrequencyMap: nil,
cipher: nil,
}
// Push the RotatedCipherStruct back into the main channel
mainChannel <- RotatedCipherStruct
}
func (PrintString Ciphertext) Println() {
fmt.Println(PrintString)
}
func (CiphertextVar Ciphertext) GenFrequencyMap(mainChannel chan Ciphertext) {
// Initialize a Map mapping runes (chars) to ins (the amount of occurrences)
newFrequencyMap := make(map[string]int)
// Iterate over all the characters in the CipherText generating a FrequencyMap
CipherTextLength := len(CiphertextVar.Text)
ciphertext := CiphertextVar.Text
for i := 0; i < CipherTextLength; i++ {
newFrequencyMap[string(rune(ciphertext[i]))] = newFrequencyMap[string(rune(ciphertext[i]))] + 1
}
// Generate an instance of the Ciphertext containing the new FrequencyMap
newCipherText := Ciphertext{
Text: CiphertextVar.Text,
FrequencyMap: newFrequencyMap,
BiGrams: nil,
cipher: nil,
}
// Push the newCipherText back into the mainChannel
mainChannel <- newCipherText
}
func (CiphertextVar Ciphertext) GenBiGramMap(mainChannel chan Ciphertext) {
newBiGramMap := make(map[string]int)
// Iterate over all the characters in the CipherText generating a FrequencyMap
CipherTextLength := len(CiphertextVar.Text)
ciphertext := CiphertextVar.Text
for i := 0; i < CipherTextLength-1; i++ {
newBiGramMap[string(ciphertext[i:i+2])] = newBiGramMap[string(ciphertext[i:i+2])] + 1
}
// Generate an instance of the Ciphertext containing the new FrequencyMap
newCipherText := Ciphertext{
Text: CiphertextVar.Text,
FrequencyMap: CiphertextVar.FrequencyMap,
BiGrams: newBiGramMap,
cipher: nil,
}
// Push the newCipherText back into the mainChannel
mainChannel <- newCipherText
}
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