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46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
## Description:
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`crypto` is a module that exposes cryptographic algorithms to V programs.
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Each submodule implements things differently, so be sure to consider the documentation
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of the specific algorithm you need, but in general, the method is to create a `cipher`
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struct using one of the module functions, and then to call the `encrypt` or `decrypt`
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method on that struct to actually encrypt or decrypt your data.
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This module is a work-in-progress. For example, the AES implementation currently requires you
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to create a destination buffer of the correct size to receive the decrypted data, and the AesCipher
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`encrypt` and `decrypt` functions only operate on the first block of the `src`.
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The implementations here are loosely based on [Go's crypto package](https://pkg.go.dev/crypto).
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## Examples:
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```v
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import crypto.aes
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import crypto.rand
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fn main() {
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// remember to save this key somewhere if you ever want to decrypt your data
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key := rand.bytes(32) ?
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println('KEY: $key')
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// this data is one block (16 bytes) big
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mut data := 'THIS IS THE DATA'.bytes()
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println('generating cipher')
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cipher := aes.new_cipher(key)
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println('performing encryption')
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mut encrypted := []byte{len: aes.block_size}
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cipher.encrypt(mut encrypted, data)
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println(encrypted)
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println('performing decryption')
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mut decrypted := []byte{len: aes.block_size}
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cipher.decrypt(mut decrypted, encrypted)
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println(decrypted)
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assert decrypted == data
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}
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```
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