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package auth
import (
"crypto/rand"
"encoding/base64"
"math/big"
"donetick.com/core/logging"
"github.com/gin-gonic/gin"
"golang.org/x/crypto/bcrypt"
)
const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()_+-=[]{}|;':,.<>?/~"
func EncodePassword(password string) (string, error) {
bytes, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
return "", err
}
return string(bytes), nil
}
func Matches(hashedPassword, password string) error {
return bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(password))
}
func GenerateRandomPassword(length int) string {
// Create a buffer to hold the random bytes.
buffer := make([]byte, length)
// Compute the maximum index for the characters.
maxIndex := big.NewInt(int64(len(chars)))
// Generate random bytes and use them to select characters from the set.
for i := 0; i < length; i++ {
randomIndex, _ := rand.Int(rand.Reader, maxIndex)
buffer[i] = chars[randomIndex.Int64()]
}
return string(buffer)
}
func GenerateEmailResetToken(c *gin.Context) (string, error) {
logger := logging.FromContext(c)
// Define the length of the token (in bytes). For example, 32 bytes will result in a 44-character base64-encoded token.
tokenLength := 32
// Generate a random byte slice.
tokenBytes := make([]byte, tokenLength)
_, err := rand.Read(tokenBytes)
if err != nil {
logger.Errorw("password.GenerateEmailResetToken failed to generate random bytes", "err", err)
return "", err
}
// Encode the byte slice to a base64 string.
token := base64.URLEncoding.EncodeToString(tokenBytes)
return token, nil
}
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