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[dragonfly.git] / secure / lib / libcrypto / man / PKCS7_decrypt.3
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80.\" If the F register is turned on, we'll generate
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82.\" TH Title
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96.TH PKCS7_decrypt 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
97.UC
98.if n .hy 0
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188.\}
189.rm #[ #] #H #V #F C
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190.SH "NAME"
191PKCS7_decrypt \- decrypt content from a PKCS#7 envelopedData structure
192.SH "SYNOPSIS"
74dab6c2 193int \fIPKCS7_decrypt\fR\|(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);
984263bc 194.SH "DESCRIPTION"
74dab6c2 195\fIPKCS7_decrypt()\fR extracts and decrypts the content from a PKCS#7 envelopedData
984263bc 196structure. \fBpkey\fR is the private key of the recipient, \fBcert\fR is the
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197recipients certificate, \fBdata\fR is a BIO to write the content to and
198\fBflags\fR is an optional set of flags.
984263bc 199.SH "NOTES"
74dab6c2 200\fIOpenSSL_add_all_algorithms()\fR (or equivalent) should be called before using this
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201function or errors about unknown algorithms will occur.
202.PP
203Although the recipients certificate is not needed to decrypt the data it is needed
204to locate the appropriate (of possible several) recipients in the PKCS#7 structure.
205.PP
206The following flags can be passed in the \fBflags\fR parameter.
207.PP
74dab6c2 208If the \fBPKCS7_TEXT\fR flag is set MIME headers for type \fBtext/plain\fR are deleted
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209from the content. If the content is not of type \fBtext/plain\fR then an error is
210returned.
211.SH "RETURN VALUES"
74dab6c2 212\fIPKCS7_decrypt()\fR returns either 1 for success or 0 for failure.
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213The error can be obtained from \fIERR_get_error\fR\|(3)
214.SH "BUGS"
74dab6c2 215\fIPKCS7_decrypt()\fR must be passed the correct recipient key and certificate. It would
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216be better if it could look up the correct key and certificate from a database.
217.PP
218The lack of single pass processing and need to hold all data in memory as
219mentioned in \fIPKCS7_sign()\fR also applies to \fIPKCS7_verify()\fR.
220.SH "SEE ALSO"
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221ERR_get_error(3), PKCS7_encrypt(3)
222.SH "HISTORY"
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223\fIPKCS7_decrypt()\fR was added to OpenSSL 0.9.5
224
225.rn }` ''
226.IX Title "PKCS7_decrypt 3"
227.IX Name "PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure"
228
229.IX Header "NAME"
230
231.IX Header "SYNOPSIS"
232
233.IX Header "DESCRIPTION"
234
235.IX Header "NOTES"
236
237.IX Header "RETURN VALUES"
238
239.IX Header "BUGS"
240
241.IX Header "SEE ALSO"
242
984263bc 243.IX Header "HISTORY"
74dab6c2 244