PKCS7_SET_TYPE(3)          Library Functions Manual          PKCS7_SET_TYPE(3)

NAME
     PKCS7_set_type, PKCS7_set0_type_other - initialize type of PKCS#7
     ContentInfo

SYNOPSIS
     #include <openssl/pkcs7.h>

     int
     PKCS7_set_type(PKCS7 *p7, int type);

     int
     PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *content);

DESCRIPTION
     These functions set the type of an unused ContentInfo structure p7.

     The function PKCS7_set_type() also allocates and initializes an empty
     child object in p7.  The type argument can be any of these NIDs, creating
     a child object of the indicated data type:

     type argument                   data type of child     version
     NID_pkcs7_data                  ASN1_OCTET_STRING      n.a.
     NID_pkcs7_digest                PKCS7_DIGEST           0
     NID_pkcs7_encrypted             PKCS7_ENCRYPT          0
     NID_pkcs7_enveloped             PKCS7_ENVELOPE         0
     NID_pkcs7_signed                PKCS7_SIGNED           1
     NID_pkcs7_signedAndEnveloped    PKCS7_SIGN_ENVELOPE    1

     If the provided type is invalid, p7 remains unchanged and
     PKCS7_set_type() fails.

     If memory allocation fails, PKCS7_set_type() fails and p7 may remain in
     an inconsistent state.

     The function PKCS7_set0_type_other() accepts an arbitrary NID as the type
     and also sets the content, neither checking it in any way nor copying it.

     For both functions, the rest of the internal state of p7 remains
     unchanged.

RETURN VALUES
     The function PKCS7_set_type() returns 1 on success or 0 on failure.

     The function PKCS7_set0_type_other() does no error handling at all and
     always returns 1.

SEE ALSO
     ASN1_OCTET_STRING_new(3), ASN1_TYPE_new(3), PKCS7_encrypt(3),
     PKCS7_new(3), PKCS7_set_content(3), PKCS7_sign(3)

HISTORY
     The function PKCS7_set_type() first appeared in SSLeay 0.8.1 and
     PKCS7_set0_type_other() in OpenSSL 0.9.8.  Both have been available since
     OpenBSD 2.4.

CAVEATS
     If p7 has already been in use before being passed to one of these
     functions, it will report success even though it leaks memory.  Later on,
     if other functions try to use p7 in its former role, they are likely to
     misbehave.

Linux 6.8.7-arch1-1              May 20, 2020              Linux 6.8.7-arch1-1