1.\" Automatically generated by Pod::Man version 1.15
| 1.\" Automatically generated by Pod::Man version 1.15
|
2.\" Tue Jul 30 09:21:49 2002
| 2.\" Mon Jan 13 19:28:31 2003
|
3.\"
4.\" Standard preamble:
5.\" ======================================================================
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37.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used
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58.\"
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138.\" ======================================================================
139.\"
140.IX Title "RSA_check_key 3"
| 3.\"
4.\" Standard preamble:
5.\" ======================================================================
6.de Sh \" Subsection heading
7.br
8.if t .Sp
9.ne 5
10.PP
11\fB\\$1\fR
12.PP
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14.de Sp \" Vertical space (when we can't use .PP)
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34.\" Set up some character translations and predefined strings. \*(-- will
35.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
36.\" double quote, and \*(R" will give a right double quote. | will give a
37.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used
38.\" to do unbreakable dashes and therefore won't be available. \*(C` and
39.\" \*(C' expand to `' in nroff, nothing in troff, for use with C<>
40.tr \(*W-|\(bv\*(Tr
41.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
42.ie n \{\
43. ds -- \(*W-
44. ds PI pi
45. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
46. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
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58.\"
59.\" If the F register is turned on, we'll generate index entries on stderr
60.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and
61.\" index entries marked with X<> in POD. Of course, you'll have to process
62.\" the output yourself in some meaningful fashion.
63.if \nF \{\
64. de IX
65. tm Index:\\$1\t\\n%\t"\\$2"
66..
67. nr % 0
68. rr F
69.\}
70.\"
71.\" For nroff, turn off justification. Always turn off hyphenation; it
72.\" makes way too many mistakes in technical documents.
73.hy 0
74.if n .na
75.\"
76.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
77.\" Fear. Run. Save yourself. No user-serviceable parts.
78.bd B 3
79. \" fudge factors for nroff and troff
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138.\" ======================================================================
139.\"
140.IX Title "RSA_check_key 3"
|
141.TH RSA_check_key 3 "0.9.6e" "2002-07-30" "OpenSSL"
| 141.TH RSA_check_key 3 "0.9.7" "2003-01-13" "OpenSSL"
|
142.UC
143.SH "NAME"
144RSA_check_key \- validate private \s-1RSA\s0 keys
145.SH "SYNOPSIS"
146.IX Header "SYNOPSIS"
147.Vb 1
148\& #include <openssl/rsa.h>
149.Ve
150.Vb 1
151\& int RSA_check_key(RSA *rsa);
152.Ve
153.SH "DESCRIPTION"
154.IX Header "DESCRIPTION"
155This function validates \s-1RSA\s0 keys. It checks that \fBp\fR and \fBq\fR are
156in fact prime, and that \fBn = p*q\fR.
157.PP
158It also checks that \fBd*e = 1 mod (p-1*q-1)\fR,
159and that \fBdmp1\fR, \fBdmq1\fR and \fBiqmp\fR are set correctly or are \fB\s-1NULL\s0\fR.
160.PP
161As such, this function can not be used with any arbitrary \s-1RSA\s0 key object,
162even if it is otherwise fit for regular \s-1RSA\s0 operation. See \fB\s-1NOTES\s0\fR for more
163information.
164.SH "RETURN VALUE"
165.IX Header "RETURN VALUE"
166\&\fIRSA_check_key()\fR returns 1 if \fBrsa\fR is a valid \s-1RSA\s0 key, and 0 otherwise.
167\&\-1 is returned if an error occurs while checking the key.
168.PP
169If the key is invalid or an error occurred, the reason code can be
170obtained using ERR_get_error(3).
171.SH "NOTES"
172.IX Header "NOTES"
173This function does not work on \s-1RSA\s0 public keys that have only the modulus
174and public exponent elements populated. It performs integrity checks on all
175the \s-1RSA\s0 key material, so the \s-1RSA\s0 key structure must contain all the private
176key data too.
| 142.UC
143.SH "NAME"
144RSA_check_key \- validate private \s-1RSA\s0 keys
145.SH "SYNOPSIS"
146.IX Header "SYNOPSIS"
147.Vb 1
148\& #include <openssl/rsa.h>
149.Ve
150.Vb 1
151\& int RSA_check_key(RSA *rsa);
152.Ve
153.SH "DESCRIPTION"
154.IX Header "DESCRIPTION"
155This function validates \s-1RSA\s0 keys. It checks that \fBp\fR and \fBq\fR are
156in fact prime, and that \fBn = p*q\fR.
157.PP
158It also checks that \fBd*e = 1 mod (p-1*q-1)\fR,
159and that \fBdmp1\fR, \fBdmq1\fR and \fBiqmp\fR are set correctly or are \fB\s-1NULL\s0\fR.
160.PP
161As such, this function can not be used with any arbitrary \s-1RSA\s0 key object,
162even if it is otherwise fit for regular \s-1RSA\s0 operation. See \fB\s-1NOTES\s0\fR for more
163information.
164.SH "RETURN VALUE"
165.IX Header "RETURN VALUE"
166\&\fIRSA_check_key()\fR returns 1 if \fBrsa\fR is a valid \s-1RSA\s0 key, and 0 otherwise.
167\&\-1 is returned if an error occurs while checking the key.
168.PP
169If the key is invalid or an error occurred, the reason code can be
170obtained using ERR_get_error(3).
171.SH "NOTES"
172.IX Header "NOTES"
173This function does not work on \s-1RSA\s0 public keys that have only the modulus
174and public exponent elements populated. It performs integrity checks on all
175the \s-1RSA\s0 key material, so the \s-1RSA\s0 key structure must contain all the private
176key data too.
|
| 177.PP
178Unlike most other \s-1RSA\s0 functions, this function does \fBnot\fR work
179transparently with any underlying \s-1ENGINE\s0 implementation because it uses the
180key data in the \s-1RSA\s0 structure directly. An \s-1ENGINE\s0 implementation can
181override the way key data is stored and handled, and can even provide
182support for \s-1HSM\s0 keys \- in which case the \s-1RSA\s0 structure may contain \fBno\fR
183key data at all! If the \s-1ENGINE\s0 in question is only being used for
184acceleration or analysis purposes, then in all likelihood the \s-1RSA\s0 key data
185is complete and untouched, but this can't be assumed in the general case.
186.SH "BUGS"
187.IX Header "BUGS"
188A method of verifying the \s-1RSA\s0 key using opaque \s-1RSA\s0 \s-1API\s0 functions might need
189to be considered. Right now \fIRSA_check_key()\fR simply uses the \s-1RSA\s0 structure
190elements directly, bypassing the \s-1RSA_METHOD\s0 table altogether (and
191completely violating encapsulation and object-orientation in the process).
192The best fix will probably be to introduce a \*(L"\fIcheck_key()\fR\*(R" handler to the
193\&\s-1RSA_METHOD\s0 function table so that alternative implementations can also
194provide their own verifiers.
|
177.SH "SEE ALSO"
178.IX Header "SEE ALSO"
| 195.SH "SEE ALSO"
196.IX Header "SEE ALSO"
|
179rsa(3), err(3)
| 197rsa(3), ERR_get_error(3)
|
180.SH "HISTORY"
181.IX Header "HISTORY"
| 198.SH "HISTORY"
199.IX Header "HISTORY"
|
182\&\fIRSA_check()\fR appeared in OpenSSL 0.9.4.
| 200\&\fIRSA_check_key()\fR appeared in OpenSSL 0.9.4.
|
| |