https://github.com/jangko/nimaes

Advanced Encryption Standard, Rinjdael Algorithm written in Nim
https://github.com/jangko/nimaes

aes-256 aes-encryption encryption encryption-standard nim rinjdael-algorithm

Last synced: about 1 month ago
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Advanced Encryption Standard, Rinjdael Algorithm written in Nim

• Host: GitHub
• URL: https://github.com/jangko/nimaes
• Owner: jangko
• Created: 2015-08-28T14:43:53.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2022-08-09T07:10:04.000Z (over 2 years ago)
• Last Synced: 2024-08-04T03:07:00.464Z (5 months ago)
• Topics: aes-256, aes-encryption, encryption, encryption-standard, nim, rinjdael-algorithm
• Language: Nim
• Homepage:
• Size: 763 KB
• Stars: 53
• Watchers: 6
• Forks: 4
• Open Issues: 2
• Metadata Files:
  • Readme: readme.md

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README

        
# **nimAES**

### Advanced Encryption Standard

#### Rinjdael Algorithm written in Nim

initially this was part of [nimPDF](https://github.com/jangko/nimpdf) project, then I decided to release it separately

example:

```nimrod

var aes = initAES()

let input = "0123456789ABCDEF"

let key = "FEDCBA9876543210"

if aes.setEncodeKey(key):

  let encrypted = aes.encryptECB(input)

  if aes.setDecodeKey(key):

    let decrypted = aes.decryptECB(encrypted)

    assert decrypted == input

```

both setEncodeKey and setDecodeKey accept 128, 192, and 256 bits key length

supported mode:

| MODE | Codec Pair | IV 16 bytes | IO | EncKey | DecKey |

|--------|------------|-------------|:----------:|--------|--------|

| ECB | yes | no | 1 block | yes | yes |

| CBC | yes | yes | n x blocks | yes | yes |

| CFB128 | yes | yes | n x blocks | yes | no |

| CFB8 | yes | yes | n x blocks | yes | no |

| CTR | no | yes | stream | yes | no |

| OFB | no | yes | n x blocks | yes | no |

output length always same with input length

1 block equal to 16 bytes

CTR mode accept arbitrary input length

IV = Initialization Vector

Codec Pair:

 - yes: have encrypt and decrypt

 - no: only one function both for encrypt and decrypt