使用 Objective-c 将 C 指针的内容存储到文件中

发布于 2024-12-29 21:10:36 字数 288 浏览 0 评论 0原文

我有一个 CMS_ContentInfo 指针...

    CMS_ContentInfo *encryptedDataWithCMS = CMS_encrypt(certList, dataToEncrypt, cipher, NULL);

...我想将 CMS_ContentInfo 存储到一个新的 .p7m 文件中。有谁知道如何做到这一点？

编辑：此外，我需要将其保存在 Objective-C （NSObject 的任何实例）中。

谢谢，克里斯

原文

I have a CMS_ContentInfo pointer...

    CMS_ContentInfo *encryptedDataWithCMS = CMS_encrypt(certList, dataToEncrypt, cipher, NULL);

... and I would like to store the CMS_ContentInfo into a new .p7m file.
Does anyone have an idea how to do this?

EDIT: Furthermore I need to save it in objective-c (any instance of NSObject).

Thanks,
Chris

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短暂陪伴 2025-01-05 21:10:36

不确定这是否是您所要求的，但要编写结构的内容：

void writePtr( CMS_ContentInfo *tehPtr ){

    FILE *tehFile;

    //opens the file you want to write in, please notice the fopen mode "wb".
    tehFile = fopen( "tehFilePath", "wb" );
    //write 1 block of sizeOf( CMS_ContentInfo ) bytes into tehFile with the contents
    //of tehPtr
    fwrite( tehPtr, sizeOf( CMS_ContentInfo ), 1, tehFile );

    fclose( tehFile );

}

CMS_ContentInfo readPtr(){

    FILE *tehFile;
    CMS_ContentInfo *tehPtr;

    //opens the file you want to read from, please notice the fopen mode "rb".
    tehFile = fopen( "tehFilePath", "rb" );
    //allocates tho pointer where the read data will be stored.
    tehPtr = (CMS_ContentInfo *) malloc( sizeOf(CMS_ContentInfo) );

    //reads 1 block of sizeOf( CMS_ContentInfo ) bytes from tehFile into tehPtr
    fread( tehPtr, sizeOf( CMS_ContentInfo ), 1, tehFile );

    fclose( tehFile );

    return tehPtr;

}

Not sure if this is what you are asking, but to write the contents of a structure:

void writePtr( CMS_ContentInfo *tehPtr ){

    FILE *tehFile;

    //opens the file you want to write in, please notice the fopen mode "wb".
    tehFile = fopen( "tehFilePath", "wb" );
    //write 1 block of sizeOf( CMS_ContentInfo ) bytes into tehFile with the contents
    //of tehPtr
    fwrite( tehPtr, sizeOf( CMS_ContentInfo ), 1, tehFile );

    fclose( tehFile );

}

CMS_ContentInfo readPtr(){

    FILE *tehFile;
    CMS_ContentInfo *tehPtr;

    //opens the file you want to read from, please notice the fopen mode "rb".
    tehFile = fopen( "tehFilePath", "rb" );
    //allocates tho pointer where the read data will be stored.
    tehPtr = (CMS_ContentInfo *) malloc( sizeOf(CMS_ContentInfo) );

    //reads 1 block of sizeOf( CMS_ContentInfo ) bytes from tehFile into tehPtr
    fread( tehPtr, sizeOf( CMS_ContentInfo ), 1, tehFile );

    fclose( tehFile );

    return tehPtr;

}

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