mirror of https://github.com/mitchell/selfpass.git
69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
package crypto
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import (
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"fmt"
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"math/rand"
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"time"
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)
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func GenerateKeyFromPassword(pass []byte) ([]byte, error) {
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if len(pass) < 8 {
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return nil, fmt.Errorf("master password must be at least 8 characters")
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}
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for idx := 0; len(pass) < 32; idx++ {
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pass = append(pass, pass[idx])
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if idx == len(pass) {
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idx = 0
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}
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}
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return pass, nil
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}
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func CombinePasswordAndKey(pass, key []byte) ([]byte, error) {
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if len(pass) < 8 {
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return nil, fmt.Errorf("master password must be at least 8 characters")
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}
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if len(key) != 16 {
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return nil, fmt.Errorf("key was not of length 16")
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}
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for idx := 0; len(pass) < 16; idx++ {
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pass = append(pass, pass[idx])
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}
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return append(pass[:16], key...), nil
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}
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func GeneratePassword(length int, numbers, specials bool) string {
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const alphas = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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const alphanumerics = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
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const alphasAndSpecials = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*()"
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const alphanumericsAndSpecials = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*()"
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rand.Seed(time.Now().UnixNano())
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pass := make([]byte, length)
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switch {
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case numbers && specials:
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for idx := 0; idx < length; idx++ {
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pass[idx] = alphanumericsAndSpecials[rand.Int63()%int64(len(alphanumericsAndSpecials))]
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}
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case numbers:
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for idx := 0; idx < length; idx++ {
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pass[idx] = alphanumerics[rand.Int63()%int64(len(alphanumerics))]
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}
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case specials:
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for idx := 0; idx < length; idx++ {
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pass[idx] = alphasAndSpecials[rand.Int63()%int64(len(alphasAndSpecials))]
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}
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default:
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for idx := 0; idx < length; idx++ {
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pass[idx] = alphas[rand.Int63()%int64(len(alphas))]
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}
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}
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return string(pass)
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}
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