42 lines
974 B
Go
42 lines
974 B
Go
package utils
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import (
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"crypto"
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"crypto/rsa"
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"crypto/sha256"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"strings"
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)
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// 验证私钥的签名， publicKey从证书里获取公钥 certificate.PublicKey
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func VerifySignature(publicKey any, data, signature []byte) bool {
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rsaPublicKey := publicKey.(*rsa.PublicKey)
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hashed := sha256.Sum256(data)
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err := rsa.VerifyPKCS1v15(rsaPublicKey, crypto.SHA256, hashed[:], signature)
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return err == nil
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}
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// 解析证书信息
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func ParseCert(carCertificate string) (*x509.Certificate, error) {
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// 解析头尾需要换行符
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result := strings.Split(carCertificate, "-----")
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result[2] = "\n" + result[2] + "\n"
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carCertificate = strings.Join(result, "-----")
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// 解码证书
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block, _ := pem.Decode([]byte(carCertificate))
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if block == nil {
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return nil, fmt.Errorf("无法解码证书")
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}
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// 解析证书
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certificate, err := x509.ParseCertificate(block.Bytes)
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if err != nil {
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return nil, err
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}
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return certificate, nil
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}
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