问题描述
我正在尝试在C ++中使用
我的应用程序需要对文件进行加密，解密，签名和验证，而且我知道在拥有正确的密钥后该怎么做。但是我的问题实际上是，生成这些密钥的应用程序不是同一应用程序。
----- BEGIN RSA私钥-----
[Base64编码]
---- -结束RSA私钥-----
和：
----- BEGIN RSA公用密钥-----
[Base64编码]
----- END RSA公用密钥-----
经过研究，我发现了如何导入公钥：和，使用以下方法：
- CreateFile & ReadFile 读取文件内容
- CryptStringToBinary ，并使用 CRYPT_STRING_BASE64HEADER 从PEM格式转换为DER格式（删除页眉和页脚并从base64解码）
- CryptDecodeObjectEx 与 X509_PUBLIC_KEY_INFO
- CryptImportPublicKeyInfo ，以导入密钥
但是现在，我的问题是要使用私钥。
任何帮助都会非常感激:)
谢谢。
PEM私钥可以通过使用 CryptDecodeObjectEx 和 PKCS_RSA_PRIVATE_KEY 然后调用 CryptImportKey 导入CAPI。
我编写了一个示例，展示了如何使用PEM编码的RSA私钥来使用CAPI签名数据。这是它的链接：
我希望这会有所帮助。
I'm trying to use the WinCrypt API in C++.
My application need to cipher, decipher, sign and verify files, and I know how to do that once I have the correct keys. But my problem is actually that that is NOT the same application which generates those keys.
What I have is public and private keys in files in PEM format :
-----BEGIN RSA PRIVATE KEY-----
[Base64 encoded]
-----END RSA PRIVATE KEY-----
And :
-----BEGIN RSA PUBLIC KEY-----
[Base64 encoded]
-----END RSA PUBLIC KEY-----
After some research, I have found how to import the public key : here and here, using the following methods :
- CreateFile & ReadFile to read the file content
- CryptStringToBinary, with CRYPT_STRING_BASE64HEADER to convert from PEM format to DER format (remove header and footer and decode from base64)
- CryptDecodeObjectEx with X509_PUBLIC_KEY_INFO
- CryptImportPublicKeyInfo, to import the key
But now, my problem is to do the same thing whith the private key.Any help would be really really appreciated :)Thank you.
A PEM private key can be imported into CAPI by using CryptDecodeObjectEx with PKCS_RSA_PRIVATE_KEY and then calling CryptImportKey.
I have written a sample that shows how to use a PEM encoded RSA private key for signing data using CAPI. Here is a link to it : http://www.idrix.fr/Root/Samples/capi_pem.cpp
I hope this will help.
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