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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/crypto/SMIME_read_PKCS7.pod | |
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Diffstat (limited to 'openssl/doc/crypto/SMIME_read_PKCS7.pod')
-rw-r--r-- | openssl/doc/crypto/SMIME_read_PKCS7.pod | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/openssl/doc/crypto/SMIME_read_PKCS7.pod b/openssl/doc/crypto/SMIME_read_PKCS7.pod new file mode 100644 index 000000000..ffafa3788 --- /dev/null +++ b/openssl/doc/crypto/SMIME_read_PKCS7.pod @@ -0,0 +1,71 @@ +=pod + +=head1 NAME + +SMIME_read_PKCS7 - parse S/MIME message. + +=head1 SYNOPSIS + +PKCS7 *SMIME_read_PKCS7(BIO *in, BIO **bcont); + +=head1 DESCRIPTION + +SMIME_read_PKCS7() parses a message in S/MIME format. + +B<in> is a BIO to read the message from. + +If cleartext signing is used then the content is saved in +a memory bio which is written to B<*bcont>, otherwise +B<*bcont> is set to B<NULL>. + +The parsed PKCS#7 structure is returned or B<NULL> if an +error occurred. + +=head1 NOTES + +If B<*bcont> is not B<NULL> then the message is clear text +signed. B<*bcont> can then be passed to PKCS7_verify() with +the B<PKCS7_DETACHED> flag set. + +Otherwise the type of the returned structure can be determined +using PKCS7_type(). + +To support future functionality if B<bcont> is not B<NULL> +B<*bcont> should be initialized to B<NULL>. For example: + + BIO *cont = NULL; + PKCS7 *p7; + + p7 = SMIME_read_PKCS7(in, &cont); + +=head1 BUGS + +The MIME parser used by SMIME_read_PKCS7() is somewhat primitive. +While it will handle most S/MIME messages more complex compound +formats may not work. + +The parser assumes that the PKCS7 structure is always base64 +encoded and will not handle the case where it is in binary format +or uses quoted printable format. + +The use of a memory BIO to hold the signed content limits the size +of message which can be processed due to memory restraints: a +streaming single pass option should be available. + +=head1 RETURN VALUES + +SMIME_read_PKCS7() returns a valid B<PKCS7> structure or B<NULL> +is an error occurred. The error can be obtained from ERR_get_error(3). + +=head1 SEE ALSO + +L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_type(3)|PKCS7_type(3)> +L<SMIME_read_PKCS7(3)|SMIME_read_PKCS7(3)>, L<PKCS7_sign(3)|PKCS7_sign(3)>, +L<PKCS7_verify(3)|PKCS7_verify(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)> +L<PKCS7_decrypt(3)|PKCS7_decrypt(3)> + +=head1 HISTORY + +SMIME_read_PKCS7() was added to OpenSSL 0.9.5 + +=cut |