mirror of
https://github.com/warmbly/warmbly.git
synced 2026-08-19 08:01:16 +00:00
Matthew Meszaros
39 lines
853 B
Go
39 lines
853 B
Go
package crypt
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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"errors"
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"fmt"
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)
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var ErrPemDecode = errors.New("failed to decode pem block")
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var ErrPublicKey = errors.New("not an RSA public key")
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var ErrRSAKeySize = errors.New("invalid rsa key size")
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var ErrNonceSize = errors.New("ciphertext too short for nonce")
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func ValidateRSAPublicKey(pubB64 string) error {
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pemBytes, err := base64.StdEncoding.DecodeString(pubB64)
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if err != nil {
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return fmt.Errorf("invalid base64: %w", err)
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}
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block, _ := pem.Decode(pemBytes)
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if block == nil {
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return errors.New("not valid PEM")
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}
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pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
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if err != nil {
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return fmt.Errorf("invalid RSA public key: %w", err)
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}
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if _, ok := pubInterface.(*rsa.PublicKey); !ok {
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return errors.New("key is not RSA")
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}
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return nil
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}
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