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Diffstat (limited to 'doc/crypto/PKCS7_sign.pod')
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1 files changed, 0 insertions, 116 deletions
diff --git a/doc/crypto/PKCS7_sign.pod b/doc/crypto/PKCS7_sign.pod deleted file mode 100644 index 64a35144f8c9..000000000000 --- a/doc/crypto/PKCS7_sign.pod +++ /dev/null @@ -1,116 +0,0 @@ -=pod - -=head1 NAME - -PKCS7_sign - create a PKCS#7 signedData structure - -=head1 SYNOPSIS - - #include <openssl/pkcs7.h> - - PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, BIO *data, int flags); - -=head1 DESCRIPTION - -PKCS7_sign() creates and returns a PKCS#7 signedData structure. B<signcert> is -the certificate to sign with, B<pkey> is the corresponsding private key. -B<certs> is an optional additional set of certificates to include in the PKCS#7 -structure (for example any intermediate CAs in the chain). - -The data to be signed is read from BIO B<data>. - -B<flags> is an optional set of flags. - -=head1 NOTES - -Any of the following flags (ored together) can be passed in the B<flags> -parameter. - -Many S/MIME clients expect the signed content to include valid MIME headers. If -the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are prepended -to the data. - -If B<PKCS7_NOCERTS> is set the signer's certificate will not be included in the -PKCS7 structure, the signer's certificate must still be supplied in the -B<signcert> parameter though. This can reduce the size of the signature if the -signers certificate can be obtained by other means: for example a previously -signed message. - -The data being signed is included in the PKCS7 structure, unless -B<PKCS7_DETACHED> is set in which case it is omitted. This is used for PKCS7 -detached signatures which are used in S/MIME plaintext signed messages for -example. - -Normally the supplied content is translated into MIME canonical format (as -required by the S/MIME specifications) if B<PKCS7_BINARY> is set no translation -occurs. This option should be used if the supplied data is in binary format -otherwise the translation will corrupt it. - -The signedData structure includes several PKCS#7 autenticatedAttributes -including the signing time, the PKCS#7 content type and the supported list of -ciphers in an SMIMECapabilities attribute. If B<PKCS7_NOATTR> is set then no -authenticatedAttributes will be used. If B<PKCS7_NOSMIMECAP> is set then just -the SMIMECapabilities are omitted. - -If present the SMIMECapabilities attribute indicates support for the following -algorithms: triple DES, 128 bit RC2, 64 bit RC2, DES and 40 bit RC2. If any of -these algorithms is disabled then it will not be included. - -If the flags B<PKCS7_STREAM> is set then the returned B<PKCS7> structure is -just initialized ready to perform the signing operation. The signing is however -B<not> performed and the data to be signed is not read from the B<data> -parameter. Signing is deferred until after the data has been written. In this -way data can be signed in a single pass. - -If the B<PKCS7_PARTIAL> flag is set a partial B<PKCS7> structure is output to -which additional signers and capabilities can be added before finalization. - - -=head1 NOTES - -If the flag B<PKCS7_STREAM> is set the returned B<PKCS7> structure is B<not> -complete and outputting its contents via a function that does not properly -finalize the B<PKCS7> structure will give unpredictable results. - -Several functions including SMIME_write_PKCS7(), i2d_PKCS7_bio_stream(), -PEM_write_bio_PKCS7_stream() finalize the structure. Alternatively finalization -can be performed by obtaining the streaming ASN1 B<BIO> directly using -BIO_new_PKCS7(). - -If a signer is specified it will use the default digest for the signing -algorithm. This is B<SHA1> for both RSA and DSA keys. - -In OpenSSL 1.0.0 the B<certs>, B<signcert> and B<pkey> parameters can all be -B<NULL> if the B<PKCS7_PARTIAL> flag is set. One or more signers can be added -using the function B<PKCS7_sign_add_signer()>. B<PKCS7_final()> must also be -called to finalize the structure if streaming is not enabled. Alternative -signing digests can also be specified using this method. - -In OpenSSL 1.0.0 if B<signcert> and B<pkey> are NULL then a certificates only -PKCS#7 structure is output. - -In versions of OpenSSL before 1.0.0 the B<signcert> and B<pkey> parameters must -B<NOT> be NULL. - -=head1 BUGS - -Some advanced attributes such as counter signatures are not supported. - -=head1 RETURN VALUES - -PKCS7_sign() returns either a valid PKCS7 structure or NULL if 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_verify(3)|PKCS7_verify(3)> - -=head1 HISTORY - -PKCS7_sign() was added to OpenSSL 0.9.5 - -The B<PKCS7_PARTIAL> flag was added in OpenSSL 1.0.0 - -The B<PKCS7_STREAM> flag was added in OpenSSL 1.0.0 - -=cut |