JAVA/PHP/C#版RSA验签

喜欢ヅ旅行 2021-06-26 16:06 442阅读 0赞

下面重点分析如何基于`RSA`的`PEM`文件，使用`php`和`c#`进行验签。

## 1、`php`验签 ##

function verify($data, $sign, $rsaPublicKeyFilePath) { 
    
        //读取公钥文件
    
        $pubKey = file_get_contents($rsaPublicKeyFilePath);
    
    
        //转换为openssl格式密钥
    
        $res = openssl_get_publickey($pubKey);
    
    
        //调用openssl内置方法验签，返回bool值
    
        $result = (bool)openssl_verify($data, base64_decode($sign), $res);
    
    
        //释放资源
    
        openssl_free_key($res);
    
    
        //返回资源是否成功
    
        return $result;
    }

**注意：`$rsaPublicKeyFilePath`为`pem`公钥文件路径**

## 2、`c#`验签 ##

public static bool VerifySignedHash(string str_DataToVerify, string str_SignedData, string str_publicKeyFilePath)
            {
                byte[] SignedData = Convert.FromBase64String(str_SignedData);
    
                ASCIIEncoding ByteConverter = new ASCIIEncoding();
                byte[] DataToVerify = ByteConverter.GetBytes(str_DataToVerify);
                try
                {
                    string sPublicKeyPEM = File.ReadAllText(str_publicKeyFilePath);
                   RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
    
                   rsa.PersistKeyInCsp = false;
                   rsa.LoadPublicKeyPEM(sPublicKeyPEM);
    
                   return rsa.VerifyData(DataToVerify, new SHA1CryptoServiceProvider(), SignedData);
    
                }
                catch (CryptographicException e)
                {
                    Console.WriteLine(e.Message);
    
                    return false;
                }
            }

注：`str_publicKeyFilePath`为`RSA`公钥文件路径

此处用到了`c#`的`Extension methods`，需要对`RSACryptoServiceProvider`进行扩展，扩展类为`RSACryptoServiceProviderExtension`

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.ComponentModel;
    using System.Runtime.InteropServices;
    using System.Security.Cryptography;
    
    namespace sdk
    {
        /// <summary>Extension method for initializing a RSACryptoServiceProvider from PEM data string.</summary>
        public static class RSACryptoServiceProviderExtension
        {
            #region Methods
    
            /// <summary>Extension method which initializes an RSACryptoServiceProvider from a DER public key blob.</summary>
            public static void LoadPublicKeyDER(this RSACryptoServiceProvider provider, byte[] DERData)
            {
                byte[] RSAData = RSACryptoServiceProviderExtension.GetRSAFromDER(DERData);
                byte[] publicKeyBlob = RSACryptoServiceProviderExtension.GetPublicKeyBlobFromRSA(RSAData);
                provider.ImportCspBlob(publicKeyBlob);
            }
    
            /// <summary>Extension method which initializes an RSACryptoServiceProvider from a DER private key blob.</summary>
            public static void LoadPrivateKeyDER(this RSACryptoServiceProvider provider, byte[] DERData)
            {
                byte[] privateKeyBlob = RSACryptoServiceProviderExtension.GetPrivateKeyDER(DERData);
                provider.ImportCspBlob(privateKeyBlob);
            }
    
            /// <summary>Extension method which initializes an RSACryptoServiceProvider from a PEM public key string.</summary>
            public static void LoadPublicKeyPEM(this RSACryptoServiceProvider provider, string sPEM)
            {
                byte[] DERData = RSACryptoServiceProviderExtension.GetDERFromPEM(sPEM);
                RSACryptoServiceProviderExtension.LoadPublicKeyDER(provider, DERData);
            }
    
            /// <summary>Extension method which initializes an RSACryptoServiceProvider from a PEM private key string.</summary>
            public static void LoadPrivateKeyPEM(this RSACryptoServiceProvider provider, string sPEM)
            {
                byte[] DERData = RSACryptoServiceProviderExtension.GetDERFromPEM(sPEM);
                RSACryptoServiceProviderExtension.LoadPrivateKeyDER(provider, DERData);
            }
    
            /// <summary>Returns a public key blob from an RSA public key.</summary>
            internal static byte[] GetPublicKeyBlobFromRSA(byte[] RSAData)
            {
                byte[] data = null;
                UInt32 dwCertPublicKeyBlobSize = 0;
                if (RSACryptoServiceProviderExtension.CryptDecodeObject(CRYPT_ENCODING_FLAGS.X509_ASN_ENCODING | CRYPT_ENCODING_FLAGS.PKCS_7_ASN_ENCODING,
                    new IntPtr((int)CRYPT_OUTPUT_TYPES.RSA_CSP_PUBLICKEYBLOB), RSAData, (UInt32)RSAData.Length, CRYPT_DECODE_FLAGS.NONE,
                    data, ref dwCertPublicKeyBlobSize))
                {
                    data = new byte[dwCertPublicKeyBlobSize];
                    if (!RSACryptoServiceProviderExtension.CryptDecodeObject(CRYPT_ENCODING_FLAGS.X509_ASN_ENCODING | CRYPT_ENCODING_FLAGS.PKCS_7_ASN_ENCODING,
                        new IntPtr((int)CRYPT_OUTPUT_TYPES.RSA_CSP_PUBLICKEYBLOB), RSAData, (UInt32)RSAData.Length, CRYPT_DECODE_FLAGS.NONE,
                        data, ref dwCertPublicKeyBlobSize))
                        throw new Win32Exception(Marshal.GetLastWin32Error());
                }
                else
                    throw new Win32Exception(Marshal.GetLastWin32Error());
                return data;
            }
    
            /// <summary>Converts DER binary format to a CAPI CRYPT_PRIVATE_KEY_INFO structure.</summary>
            internal static byte[] GetPrivateKeyDER(byte[] DERData)
            {
                byte[] data = null;
                UInt32 dwRSAPrivateKeyBlobSize = 0;
                IntPtr pRSAPrivateKeyBlob = IntPtr.Zero;
                if (RSACryptoServiceProviderExtension.CryptDecodeObject(CRYPT_ENCODING_FLAGS.X509_ASN_ENCODING | CRYPT_ENCODING_FLAGS.PKCS_7_ASN_ENCODING, new IntPtr((int)CRYPT_OUTPUT_TYPES.PKCS_RSA_PRIVATE_KEY),
                    DERData, (UInt32)DERData.Length, CRYPT_DECODE_FLAGS.NONE, data, ref dwRSAPrivateKeyBlobSize))
                {
                    data = new byte[dwRSAPrivateKeyBlobSize];
                    if (!RSACryptoServiceProviderExtension.CryptDecodeObject(CRYPT_ENCODING_FLAGS.X509_ASN_ENCODING | CRYPT_ENCODING_FLAGS.PKCS_7_ASN_ENCODING, new IntPtr((int)CRYPT_OUTPUT_TYPES.PKCS_RSA_PRIVATE_KEY),
                        DERData, (UInt32)DERData.Length, CRYPT_DECODE_FLAGS.NONE, data, ref dwRSAPrivateKeyBlobSize))
                        throw new Win32Exception(Marshal.GetLastWin32Error());
                }
                else
                    throw new Win32Exception(Marshal.GetLastWin32Error());
                return data;
            }
    
            /// <summary>Converts DER binary format to a CAPI CERT_PUBLIC_KEY_INFO structure containing an RSA key.</summary>
            internal static byte[] GetRSAFromDER(byte[] DERData)
            {
                byte[] data = null;
                byte[] publicKey = null;
                CERT_PUBLIC_KEY_INFO info;
                UInt32 dwCertPublicKeyInfoSize = 0;
                IntPtr pCertPublicKeyInfo = IntPtr.Zero;
                if (RSACryptoServiceProviderExtension.CryptDecodeObject(CRYPT_ENCODING_FLAGS.X509_ASN_ENCODING | CRYPT_ENCODING_FLAGS.PKCS_7_ASN_ENCODING, new IntPtr((int)CRYPT_OUTPUT_TYPES.X509_PUBLIC_KEY_INFO),
                    DERData, (UInt32)DERData.Length, CRYPT_DECODE_FLAGS.NONE, data, ref dwCertPublicKeyInfoSize))
                {
                    data = new byte[dwCertPublicKeyInfoSize];
                    if (RSACryptoServiceProviderExtension.CryptDecodeObject(CRYPT_ENCODING_FLAGS.X509_ASN_ENCODING | CRYPT_ENCODING_FLAGS.PKCS_7_ASN_ENCODING, new IntPtr((int)CRYPT_OUTPUT_TYPES.X509_PUBLIC_KEY_INFO),
                        DERData, (UInt32)DERData.Length, CRYPT_DECODE_FLAGS.NONE, data, ref dwCertPublicKeyInfoSize))
                    {
                        GCHandle handle = GCHandle.Alloc(data, GCHandleType.Pinned);
                        try
                        {
                            info = (CERT_PUBLIC_KEY_INFO)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(CERT_PUBLIC_KEY_INFO));
                            publicKey = new byte[info.PublicKey.cbData];
                            Marshal.Copy(info.PublicKey.pbData, publicKey, 0, publicKey.Length);
                        }
                        finally
                        {
                            handle.Free();
                        }
                    }
                    else
                        throw new Win32Exception(Marshal.GetLastWin32Error());
                }
                else
                    throw new Win32Exception(Marshal.GetLastWin32Error());
                return publicKey;
            }
    
            /// <summary>Extracts the binary data from a PEM file.</summary>
            internal static byte[] GetDERFromPEM(string sPEM)
            {
                UInt32 dwSkip, dwFlags;
                UInt32 dwBinarySize = 0;
    
                if (!RSACryptoServiceProviderExtension.CryptStringToBinary(sPEM, (UInt32)sPEM.Length, CRYPT_STRING_FLAGS.CRYPT_STRING_BASE64HEADER, null, ref dwBinarySize, out dwSkip, out dwFlags))
                    throw new Win32Exception(Marshal.GetLastWin32Error());
    
                byte[] decodedData = new byte[dwBinarySize];
                if (!RSACryptoServiceProviderExtension.CryptStringToBinary(sPEM, (UInt32)sPEM.Length, CRYPT_STRING_FLAGS.CRYPT_STRING_BASE64HEADER, decodedData, ref dwBinarySize, out dwSkip, out dwFlags))
                    throw new Win32Exception(Marshal.GetLastWin32Error());
                return decodedData;
            }
    
            #endregion Methods
    
            #region P/Invoke Constants
    
            /// <summary>Enumeration derived from Crypto API.</summary>
            internal enum CRYPT_ACQUIRE_CONTEXT_FLAGS : uint
            {
                CRYPT_NEWKEYSET = 0x8,
                CRYPT_DELETEKEYSET = 0x10,
                CRYPT_MACHINE_KEYSET = 0x20,
                CRYPT_SILENT = 0x40,
                CRYPT_DEFAULT_CONTAINER_OPTIONAL = 0x80,
                CRYPT_VERIFYCONTEXT = 0xF0000000
            }
    
            /// <summary>Enumeration derived from Crypto API.</summary>
            internal enum CRYPT_PROVIDER_TYPE : uint
            {
                PROV_RSA_FULL = 1
            }
    
            /// <summary>Enumeration derived from Crypto API.</summary>
            internal enum CRYPT_DECODE_FLAGS : uint
            {
                NONE = 0,
                CRYPT_DECODE_ALLOC_FLAG = 0x8000
            }
    
            /// <summary>Enumeration derived from Crypto API.</summary>
            internal enum CRYPT_ENCODING_FLAGS : uint
            {
                PKCS_7_ASN_ENCODING = 0x00010000,
                X509_ASN_ENCODING = 0x00000001,
            }
    
            /// <summary>Enumeration derived from Crypto API.</summary>
            internal enum CRYPT_OUTPUT_TYPES : int
            {
                X509_PUBLIC_KEY_INFO = 8,
                RSA_CSP_PUBLICKEYBLOB = 19,
                PKCS_RSA_PRIVATE_KEY = 43,
                PKCS_PRIVATE_KEY_INFO = 44
            }
    
            /// <summary>Enumeration derived from Crypto API.</summary>
            internal enum CRYPT_STRING_FLAGS : uint
            {
                CRYPT_STRING_BASE64HEADER = 0,
                CRYPT_STRING_BASE64 = 1,
                CRYPT_STRING_BINARY = 2,
                CRYPT_STRING_BASE64REQUESTHEADER = 3,
                CRYPT_STRING_HEX = 4,
                CRYPT_STRING_HEXASCII = 5,
                CRYPT_STRING_BASE64_ANY = 6,
                CRYPT_STRING_ANY = 7,
                CRYPT_STRING_HEX_ANY = 8,
                CRYPT_STRING_BASE64X509CRLHEADER = 9,
                CRYPT_STRING_HEXADDR = 10,
                CRYPT_STRING_HEXASCIIADDR = 11,
                CRYPT_STRING_HEXRAW = 12,
                CRYPT_STRING_NOCRLF = 0x40000000,
                CRYPT_STRING_NOCR = 0x80000000
            }
    
            #endregion P/Invoke Constants
    
            #region P/Invoke Structures
    
            /// <summary>Structure from Crypto API.</summary>
            [StructLayout(LayoutKind.Sequential)]
            internal struct CRYPT_OBJID_BLOB
            {
                internal UInt32 cbData;
                internal IntPtr pbData;
            }
    
            /// <summary>Structure from Crypto API.</summary>
            [StructLayout(LayoutKind.Sequential)]
            internal struct CRYPT_ALGORITHM_IDENTIFIER
            {
                internal IntPtr pszObjId;
                internal CRYPT_OBJID_BLOB Parameters;
            }
    
            /// <summary>Structure from Crypto API.</summary>
            [StructLayout(LayoutKind.Sequential)]
            struct CRYPT_BIT_BLOB
            {
                internal UInt32 cbData;
                internal IntPtr pbData;
                internal UInt32 cUnusedBits;
            }
    
            /// <summary>Structure from Crypto API.</summary>
            [StructLayout(LayoutKind.Sequential)]
            struct CERT_PUBLIC_KEY_INFO
            {
                internal CRYPT_ALGORITHM_IDENTIFIER Algorithm;
                internal CRYPT_BIT_BLOB PublicKey;
            }
    
            #endregion P/Invoke Structures
    
            #region P/Invoke Functions
    
            /// <summary>Function for Crypto API.</summary>
            [DllImport("advapi32.dll", SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptDestroyKey(IntPtr hKey);
    
            /// <summary>Function for Crypto API.</summary>
            [DllImport("advapi32.dll", SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptImportKey(IntPtr hProv, byte[] pbKeyData, UInt32 dwDataLen, IntPtr hPubKey, UInt32 dwFlags, ref IntPtr hKey);
    
            /// <summary>Function for Crypto API.</summary>
            [DllImport("advapi32.dll", SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptReleaseContext(IntPtr hProv, Int32 dwFlags);
    
            /// <summary>Function for Crypto API.</summary>
            [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptAcquireContext(ref IntPtr hProv, string pszContainer, string pszProvider, CRYPT_PROVIDER_TYPE dwProvType, CRYPT_ACQUIRE_CONTEXT_FLAGS dwFlags);
    
            /// <summary>Function from Crypto API.</summary>
            [DllImport("crypt32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptStringToBinary(string sPEM, UInt32 sPEMLength, CRYPT_STRING_FLAGS dwFlags, [Out] byte[] pbBinary, ref UInt32 pcbBinary, out UInt32 pdwSkip, out UInt32 pdwFlags);
    
            /// <summary>Function from Crypto API.</summary>
            [DllImport("crypt32.dll", SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptDecodeObjectEx(CRYPT_ENCODING_FLAGS dwCertEncodingType, IntPtr lpszStructType, byte[] pbEncoded, UInt32 cbEncoded, CRYPT_DECODE_FLAGS dwFlags, IntPtr pDecodePara, ref byte[] pvStructInfo, ref UInt32 pcbStructInfo);
    
            /// <summary>Function from Crypto API.</summary>
            [DllImport("crypt32.dll", SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            internal static extern bool CryptDecodeObject(CRYPT_ENCODING_FLAGS dwCertEncodingType, IntPtr lpszStructType, byte[] pbEncoded, UInt32 cbEncoded, CRYPT_DECODE_FLAGS flags, [In, Out] byte[] pvStructInfo, ref UInt32 cbStructInfo);
    
            #endregion P/Invoke Functions
        }
    }