65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
package xpem
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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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"fmt"
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)
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func DecodePublicKey(pemContent []byte) (publicKey *rsa.PublicKey, err error) {
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block, _ := pem.Decode(pemContent)
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if block == nil {
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return nil, fmt.Errorf("pem.Decode(%s)：pemContent decode error", pemContent)
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}
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switch block.Type {
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case "CERTIFICATE":
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pubKeyCert, err := x509.ParseCertificate(block.Bytes)
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if err != nil {
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return nil, fmt.Errorf("x509.ParseCertificate(%s)：%w", pemContent, err)
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}
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pubKey, ok := pubKeyCert.PublicKey.(*rsa.PublicKey)
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if !ok {
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return nil, fmt.Errorf("公钥证书提取公钥出错 [%s]", pemContent)
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}
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publicKey = pubKey
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case "PUBLIC KEY":
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pub, err := x509.ParsePKIXPublicKey(block.Bytes)
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if err != nil {
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return nil, fmt.Errorf("x509.ParsePKIXPublicKey(%s),err:%w", pemContent, err)
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}
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pubKey, ok := pub.(*rsa.PublicKey)
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if !ok {
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return nil, fmt.Errorf("公钥解析出错 [%s]", pemContent)
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}
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publicKey = pubKey
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case "RSA PUBLIC KEY":
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pubKey, err := x509.ParsePKCS1PublicKey(block.Bytes)
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if err != nil {
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return nil, fmt.Errorf("x509.ParsePKCS1PublicKey(%s)：%w", pemContent, err)
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}
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publicKey = pubKey
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}
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return publicKey, nil
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}
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func DecodePrivateKey(pemContent []byte) (privateKey *rsa.PrivateKey, err error) {
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block, _ := pem.Decode(pemContent)
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if block == nil {
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return nil, fmt.Errorf("pem.Decode(%s)：pemContent decode error", pemContent)
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}
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privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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pk8, err := x509.ParsePKCS8PrivateKey(block.Bytes)
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if err != nil {
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return nil, fmt.Errorf("私钥解析出错 [%s]", pemContent)
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}
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var ok bool
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privateKey, ok = pk8.(*rsa.PrivateKey)
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if !ok {
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return nil, fmt.Errorf("私钥解析出错 [%s]", pemContent)
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}
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}
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return privateKey, nil
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}
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