Commit 34f48b6

Anupamaraiepre-commit-ci[bot]cclauss

authored

Create vernam_cipher.py (TheAlgorithms#10702)

* Create vernam_cipher.py added vernam cipher * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py added return type * Update vernam_cipher.py added type hint for plaintext and key * Update vernam_cipher.py added tests * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py Added tests * Update vernam_cipher.py * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * Update vernam_cipher.py * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update vernam_cipher.py * Update ciphers/vernam_cipher.py * Update vernam_cipher.py --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Christian Clauss <cclauss@me.com>

1 parent be94690 commit 34f48b6Copy full SHA for 34f48b6

File tree

1 file changed

+42

-0

lines changed

ciphers
- vernam_cipher.py

1 file changed

+42

-0

lines changed

`‎ciphers/vernam_cipher.py‎`

Lines changed: 42 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,42 @@`
	`1`	`+def vernam_encrypt(plaintext: str, key: str) -> str:`
	`2`	`+ """`
	`3`	`+ >>> vernam_encrypt("HELLO","KEY")`
	`4`	`+ 'RIJVS'`
	`5`	`+ """`
	`6`	`+ ciphertext = ""`
	`7`	`+ for i in range(len(plaintext)):`
	`8`	`+ ct = ord(key[i % len(key)]) - 65 + ord(plaintext[i]) - 65`
	`9`	`+ while ct > 25:`
	`10`	`+ ct = ct - 26`
	`11`	`+ ciphertext += chr(65 + ct)`
	`12`	`+ return ciphertext`
	`13`	`+`
	`14`	`+`
	`15`	`+def vernam_decrypt(ciphertext: str, key: str) -> str:`
	`16`	`+ """`
	`17`	`+ >>> vernam_decrypt("RIJVS","KEY")`
	`18`	`+ 'HELLO'`
	`19`	`+ """`
	`20`	`+ decrypted_text = ""`
	`21`	`+ for i in range(len(ciphertext)):`
	`22`	`+ ct = ord(ciphertext[i]) - ord(key[i % len(key)])`
	`23`	`+ while ct < 0:`
	`24`	`+ ct = 26 + ct`
	`25`	`+ decrypted_text += chr(65 + ct)`
	`26`	`+ return decrypted_text`
	`27`	`+`
	`28`	`+`
	`29`	`+if __name__ == "__main__":`
	`30`	`+ from doctest import testmod`
	`31`	`+`
	`32`	`+ testmod()`
	`33`	`+`
	`34`	`+ # Example usage`
	`35`	`+ plaintext = "HELLO"`
	`36`	`+ key = "KEY"`
	`37`	`+ encrypted_text = vernam_encrypt(plaintext, key)`
	`38`	`+ decrypted_text = vernam_decrypt(encrypted_text, key)`
	`39`	`+ print("\n\n")`
	`40`	`+ print("Plaintext:", plaintext)`
	`41`	`+ print("Encrypted:", encrypted_text)`
	`42`	`+ print("Decrypted:", decrypted_text)`

0 commit comments

Comments

(0)

Navigation Menu

Search code, repositories, users, issues, pull requests...

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Commit 34f48b6

File tree

1 file changed

1 file changed

`‎ciphers/vernam_cipher.py‎`

0 commit comments