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PKCS7_decrypt.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" PKCS7_decrypt \- decrypt content from a PKCS#7 envelopedData structure .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/pkcs7.h> \& \& int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBPKCS7_decrypt()\fR extracts and decrypts the content from a PKCS#7 envelopedData structure. \fBpkey\fR is the private key of the recipient, \fBcert\fR is the recipients certificate, \fBdata\fR is a \s-1BIO\s0 to write the content to and \&\fBflags\fR is an optional set of flags. .SH "NOTES" .IX Header "NOTES" Although the recipients certificate is not needed to decrypt the data it is needed to locate the appropriate (of possible several) recipients in the PKCS#7 structure. .PP The following flags can be passed in the \fBflags\fR parameter. .PP If the \fB\s-1PKCS7_TEXT\s0\fR flag is set \s-1MIME\s0 headers for type \fBtext/plain\fR are deleted from the content. If the content is not of type \fBtext/plain\fR then an error is returned. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBPKCS7_decrypt()\fR returns either 1 for success or 0 for failure. The error can be obtained from \fBERR_get_error\fR\|(3) .SH "BUGS" .IX Header "BUGS" \&\fBPKCS7_decrypt()\fR must be passed the correct recipient key and certificate. It would be better if it could look up the correct key and certificate from a database. .PP The lack of single pass processing and need to hold all data in memory as mentioned in \fBPKCS7_sign()\fR also applies to \fBPKCS7_verify()\fR. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\|(3), \fBPKCS7_encrypt\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2002\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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