使用OpenSSL解码/提取smime.p7m文件内容(带有嵌入式文件的电子邮件)? [英] Decode/extract smime.p7m file contents (email with embedded files) with OpenSSL?

问题描述

我们有一个旧的进程(VBScript)，它可以读取一个公用邮箱并将某些电子邮件处理到数据库中.

We have an old process (VBScript) that reads a common mailbox and processes certain emails into a database.

新法规对所有带有附件的邮件进行了数字签名.

New regulations have all messages with attachments now being digitally signed.

该过程现在仅提取一个文件(smime.p7m).使用基于GUI的查看器，我可以看到嵌入文件并毫无问题地提取它们.但是，我真正需要的是基于命令行的提取器，该提取器将写出嵌入式文件(PDF，DOC，XLS)-它们未加密，只是经过签名.我使用没有证书的笔记本电脑对此进行了测试，并使用上述查看器打开了smime.p7m文件.

The process now only extracts one file (smime.p7m). Using a GUI-based viewer, I can see the embedded files and extract them with no problem. However, what I really need is a command-line based extracter that will write out the embedded files (PDFs, DOCs, XLSs) - they're not encrypted, just signed. I tested this by using a laptop that had no certificates and simply opened the smime.p7m file with the aforementioned viewer.

似乎OpenSSL会对此进行解码/提取，并且有人设法在Windows上编译了一个版本.但是，可执行文件的许多试验和错误测试都令人沮丧，因为我找不到正确的标志组合，只能说打开smime.p7m文件并写出找到的所有嵌入式文件".在所有选项之后，"openssl smime"似乎总是想要"cert.pem"，而我还没有.

It looks like OpenSSL will decode/extract this and someone managed to get a version compiled on Windows. However, a lot of trial and error testing of the executable has been frustrating because I can't find the right combination of flags to just say "open the smime.p7m file and write out all the embedded files you find". "openssl smime" always seems to want a "cert.pem" after all the options and I haven't got that.

我想念什么?预先感谢.

What am I missing? Thanks in advance.

推荐答案

唯一可行的选择是使用Chilkat的库编写一个简单的程序.根据每个开发人员的许可类型，此选项的价格为149美元或289美元，但至少是免版税的.

Looks like the only available option is to write a simple program using Chilkat's library. This option costs $149 or $289, depending on what kind of license, per developer, but at least it's royalty-free.

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