32 lines
763 B
Go
32 lines
763 B
Go
package rsa
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import (
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"crypto"
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"crypto/rand"
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"crypto/rsa"
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"crypto/sha256"
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"encoding/base64"
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)
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func Sign(data string, privateKey *rsa.PrivateKey) (string, error) {
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hashed := sha256.Sum256([]byte(data))
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signature, err := rsa.SignPKCS1v15(rand.Reader, privateKey, crypto.SHA256, hashed[:])
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if err != nil {
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return "", err
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}
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return base64.StdEncoding.EncodeToString(signature), nil
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}
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func Verify(data string, signature string, publicKey *rsa.PublicKey) (bool, error) {
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signatureBytes, err := base64.StdEncoding.DecodeString(signature)
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if err != nil {
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return false, err
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}
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hashed := sha256.Sum256([]byte(data))
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err = rsa.VerifyPKCS1v15(publicKey, crypto.SHA256, hashed[:], signatureBytes)
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if err != nil {
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return false, nil
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}
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return true, nil
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}
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