a528d4f0a9
If something was "present in all versions" of SSLeay, or if it was added to a version of SSLeay (and therefore predates OpenSSL), remove mention of it. Documentation history now starts with OpenSSL. Remove mention of all history before OpenSSL 0.9.8, inclusive. Remove all AUTHOR sections. Reviewed-by: Tim Hudson <tjh@openssl.org>
51 lines
1.5 KiB
Text
51 lines
1.5 KiB
Text
=pod
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=head1 NAME
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PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure
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=head1 SYNOPSIS
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#include <openssl/pkcs7.h>
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int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);
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=head1 DESCRIPTION
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PKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData
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structure. B<pkey> is the private key of the recipient, B<cert> is the
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recipients certificate, B<data> is a BIO to write the content to and
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B<flags> is an optional set of flags.
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=head1 NOTES
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OpenSSL_add_all_algorithms() (or equivalent) should be called before using this
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function or errors about unknown algorithms will occur.
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Although the recipients certificate is not needed to decrypt the data it is needed
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to locate the appropriate (of possible several) recipients in the PKCS#7 structure.
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The following flags can be passed in the B<flags> parameter.
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If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are deleted
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from the content. If the content is not of type B<text/plain> then an error is
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returned.
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=head1 RETURN VALUES
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PKCS7_decrypt() returns either 1 for success or 0 for failure.
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The error can be obtained from ERR_get_error(3)
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=head1 BUGS
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PKCS7_decrypt() must be passed the correct recipient key and certificate. It would
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be better if it could look up the correct key and certificate from a database.
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The lack of single pass processing and need to hold all data in memory as
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mentioned in PKCS7_sign() also applies to PKCS7_verify().
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=head1 SEE ALSO
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L<ERR_get_error(3)>, L<PKCS7_encrypt(3)>
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=cut
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