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49 lines
931 B
49 lines
931 B
3 years ago
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package crypto
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"github.com/go-faster/errors"
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)
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// ParseRSAPublicKeys parses data as list of PEM-encdoed public keys.
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func ParseRSAPublicKeys(data []byte) ([]*rsa.PublicKey, error) {
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var keys []*rsa.PublicKey
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for {
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block, rest := pem.Decode(data)
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if block == nil {
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break
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}
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key, err := ParseRSA(block.Bytes)
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if err != nil {
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return nil, errors.Wrap(err, "parse RSA from PEM")
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}
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keys = append(keys, key)
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data = rest
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}
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return keys, nil
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}
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// ParseRSA parses data RSA key in PKCS1 or PKIX forms.
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func ParseRSA(data []byte) (*rsa.PublicKey, error) {
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key, err := x509.ParsePKCS1PublicKey(data)
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if err == nil {
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return key, nil
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}
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k, err := x509.ParsePKIXPublicKey(data)
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if err != nil {
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return nil, err
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}
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publicKey, ok := k.(*rsa.PublicKey)
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if !ok {
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return nil, errors.Errorf("parsed unexpected key type %T", k)
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}
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return publicKey, nil
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}
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