1SMIME_read_CMS(3)                   OpenSSL                  SMIME_read_CMS(3)
2
3
4

NAME

6        SMIME_read_CMS - parse S/MIME message.
7

SYNOPSIS

9        #include <openssl/cms.h>
10
11        CMS_ContentInfo *SMIME_read_CMS(BIO *in, BIO **bcont);
12

DESCRIPTION

14       SMIME_read_CMS() parses a message in S/MIME format.
15
16       in is a BIO to read the message from.
17
18       If cleartext signing is used then the content is saved in a memory bio
19       which is written to *bcont, otherwise *bcont is set to NULL.
20
21       The parsed CMS_ContentInfo structure is returned or NULL if an error
22       occurred.
23

NOTES

25       If *bcont is not NULL then the message is clear text signed. *bcont can
26       then be passed to CMS_verify() with the CMS_DETACHED flag set.
27
28       Otherwise the type of the returned structure can be determined using
29       CMS_get0_type().
30
31       To support future functionality if bcont is not NULL *bcont should be
32       initialized to NULL. For example:
33
34        BIO *cont = NULL;
35        CMS_ContentInfo *cms;
36
37        cms = SMIME_read_CMS(in, &cont);
38

BUGS

40       The MIME parser used by SMIME_read_CMS() is somewhat primitive.  While
41       it will handle most S/MIME messages more complex compound formats may
42       not work.
43
44       The parser assumes that the CMS_ContentInfo structure is always base64
45       encoded and will not handle the case where it is in binary format or
46       uses quoted printable format.
47
48       The use of a memory BIO to hold the signed content limits the size of
49       message which can be processed due to memory restraints: a streaming
50       single pass option should be available.
51

RETURN VALUES

53       SMIME_read_CMS() returns a valid CMS_ContentInfo structure or NULL if
54       an error occurred. The error can be obtained from ERR_get_error(3).
55

SEE ALSO

57       ERR_get_error(3), CMS_type(3) SMIME_read_CMS(3), CMS_sign(3),
58       CMS_verify(3), CMS_encrypt(3) CMS_decrypt(3)
59

HISTORY

61       SMIME_read_CMS() was added to OpenSSL 0.9.8
62
63
64
651.0.2k                            2017-01-26                 SMIME_read_CMS(3)
Impressum