Hello,
I don't understand something..
I have a html mail (only html):
Date:...
From:.......
To............
MIME-Version: 1.0
Content-type: text/html;
Charset="ISO-8859-1"
<html>
[..]
</html>
I don't know if I've the good method, but I do this in my C program:
-> read the message
-> put headers into memory (when I found the first \n or the first Content-
-> put in a file "the mail", so in the the file I've:
Content-Type: text/html;
Charset="ISO-8859-1"
<html>
[...]
</html>
At this time I've
Char *headers= 'From..to...date'
Char readfile="/path/to/message_without_headers.msg";
Char writefile="/path/to/message_with_smime.msg";
X509 *cert;
EVP_PKEY *key;
BIO *in;
BIO *mem_buf;
PKCS7 *p7=NULL;
char signer[1024]="/path/to/cert.pem";
char inkey[1024]='/path/to/key.pem';
int flags = PKCS7_STREAM|PKCS7_DETACHED|PKCS7_BINARY ;
ERR_load_crypto_strings();
OpenSSL_add_all_algorithms ();
in = BIO_new_file (readfile, "r");
if (!in) die ("BIO_new_fp");
mem_buf = BIO_new (BIO_s_mem());
if (!mem_buf) die ("BIO_new");
key = load_key (inkey,password));
cert = load_cert (signer);
p7 = PKCS7_sign (cert, key, NULL, in, flags);
if (!p7) die ("PKCS7_sign");
BIO *out = BIO_new_file(writefile, "w");
if (!out) exit(1);
int ret = SMIME_write_PKCS7(out, p7, in, flags);
if (!ret) exit(1);
BIO_free(in);
BIO_free(mem_buf);
PKCS7_free(p7);
now I rewrite the mail
-> create a new file
-> put headers (original headers)
-> put writefile (who contain mail and s/mime)
-> put end of boundary
If I look this last file, I've:
From:.......
[....]
MIME-VERSION: 1.0
Content-Type: multipart/signed; protocol="application/x[..]"; micalg=sha1;
boundary="--boundary"
\n
This is an S/MIME signed message
\n
--boundary
Content-Type: text/html;\r\n
Charset="ISO-8859-1"\r\n
\r\n
<html>\r\n
[...]
</html>\r\n
\n
--boundary\n
Content-Type: application/x-pkcs7..............\n
[...]
\n
--boundary--\n
1- why, he don't put the end of the boundary? I must search it into signed
message, and put it after
2- the next problem is very strange for me..
If I sent the mail to a gmail address, s/mime is ok.
If I open the source of the mail, I see this:
Content-Type: multipart/signed;\n
Boundary=........\n
Protocol=...........\n
Micalg=sha1\n
\n
This is a ..........\n
\n
--boundary\n
Content-Transfer-Encoding: 8bit\n
Content-Type: text/html;\n
Charset="ISO-8859-1"\n
\n
<html>\n
[.......]
If I sent the mail to my mail server (telnet ip_server 25...)
I've exactly the mail who i create
->gmail: S/MIME OK
-> my server: S/MIME BAD
->gmail: rewrite Content-Type: multipart/signed; protocol= (see he change
the order, and put \n)
-> my server: nothing to change
->gmail: Add after boundary Content-Transfer-Encoding: 8bit\n
-> my server: the same, except I must remove into my program the \r after
Content-Type: text/html;
->gmail: remove all \r!!
->my server: the same
Why?? I don't understand what the matter, why google rewrite \r\n to \n, and
he work fine!
thanks
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