Package simpleCrypto

This package contains some simple crypto examples and functions written in go. I have made attempts to ensure thier correctness, however use at your own risk.

INSTALLATION

go get github.com/qubies/simpleCrypto

PACKAGE DOCUMENTATION

package simpleCrypto

import "github.com/qubies/simpleCrypto"

FUNCTIONS

func DecryptFile(srcfile, dstfile string, key []byte) error

DecryptFile decrypts srcfile into dstfile using key. keylength must be
16 bytes. modified from https://talks.golang.org/2010/io/decrypt.go

func DecryptString(key, ciphertext []byte) ([]byte, error)

DecryptString takes a key and ciphertext generated from Encrypt string
and returns just the plain text.

func EncryptFile(srcfile, dstfile string, key []byte) error

Encrypt file will create an encrypted copy of srcfile at dstfile.
appends a randomized IV to the end of the file for decryption. use of
EncryptFile should be combined with a hash for verification. Key length
must be 16 bytes modified from
https://talks.golang.org/2010/io/decrypt.go

func EncryptString(key, plain []byte) ([]byte, error)

EncryptString takes a byte array and a 16 byte key to return an
encrypted byte array. The resultant byte array is actually:

IV + HMAC + Ciphertext

WARNING: EncryptString may return plaintext on error. Check your errors.

func Pad(blockSize int, input *[]byte) error

Pad applies PKCS7 padding in place to a byte array. Padding is necessary
to ensure plain text input is divisible by the encryption block size.

func RandomBytes(len int) ([]byte, error)

RandomBytes returns a byte array of len of cryptographically secure
random bytes.

func Sha256FileSum(srcfile string) ([]byte, error)

Sha256FileSum returns the sha256 digest of a file as a byte array.

func Unpad(input *[]byte) error

Unpad removes PKCS7 padding from byte array in place.