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1.\" $OpenBSD: d2i_RSAPublicKey.3,v 1.13 2018/03/27 17:35:50 schwarze Exp $
2.\" OpenSSL bb9ad09e Jun 6 00:43:05 2016 -0400
3.\"
4.\" This file is a derived work.
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21.\" The original file was written by Ulf Moeller <ulf@openssl.org> and
22.\" Dr. Stephen Henson <steve@openssl.org>.
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70.Dd $Mdocdate: March 27 2018 $
71.Dt D2I_RSAPUBLICKEY 3
72.Os
73.Sh NAME
74.Nm d2i_RSAPublicKey ,
75.Nm i2d_RSAPublicKey ,
76.Nm d2i_RSAPrivateKey ,
77.Nm i2d_RSAPrivateKey ,
78.Nm d2i_Netscape_RSA ,
79.Nm i2d_Netscape_RSA ,
80.Nm d2i_RSA_PSS_PARAMS ,
81.Nm i2d_RSA_PSS_PARAMS ,
82.Nm d2i_RSAPublicKey_bio ,
83.Nm d2i_RSAPublicKey_fp ,
84.Nm i2d_RSAPublicKey_bio ,
85.Nm i2d_RSAPublicKey_fp ,
86.Nm d2i_RSAPrivateKey_bio ,
87.Nm d2i_RSAPrivateKey_fp ,
88.Nm i2d_RSAPrivateKey_bio ,
89.Nm i2d_RSAPrivateKey_fp ,
90.Nm d2i_RSA_PUBKEY ,
91.Nm i2d_RSA_PUBKEY ,
92.Nm d2i_RSA_PUBKEY_bio ,
93.Nm d2i_RSA_PUBKEY_fp ,
94.Nm i2d_RSA_PUBKEY_bio ,
95.Nm i2d_RSA_PUBKEY_fp
96.Nd decode and encode RSA keys and parameters
97.Sh SYNOPSIS
98.In openssl/rsa.h
99.Ft RSA *
100.Fo d2i_RSAPublicKey
101.Fa "RSA **val_out"
102.Fa "const unsigned char **der_in"
103.Fa "long length"
104.Fc
105.Ft int
106.Fo i2d_RSAPublicKey
107.Fa "RSA *val_in"
108.Fa "unsigned char **der_out"
109.Fc
110.Ft RSA *
111.Fo d2i_RSAPrivateKey
112.Fa "RSA **val_out"
113.Fa "const unsigned char **der_in"
114.Fa "long length"
115.Fc
116.Ft int
117.Fo i2d_RSAPrivateKey
118.Fa "RSA *val_in"
119.Fa "unsigned char **der_out"
120.Fc
121.Ft RSA *
122.Fo d2i_Netscape_RSA
123.Fa "RSA **val_out"
124.Fa "const unsigned char **der_in"
125.Fa "long length"
126.Fa "int (*cb)()"
127.Fc
128.Ft int
129.Fo i2d_Netscape_RSA
130.Fa "RSA *val_in"
131.Fa "unsigned char **der_out"
132.Fa "int (*cb)()"
133.Fc
134.Ft RSA_PSS_PARAMS *
135.Fo d2i_RSA_PSS_PARAMS
136.Fa "RSA_PSS_PARAMS **val_out"
137.Fa "const unsigned char **der_in"
138.Fa "long length"
139.Fc
140.Ft int
141.Fo i2d_RSA_PSS_PARAMS
142.Fa "RSA_PSS_PARAMS *val_in"
143.Fa "unsigned char **der_out"
144.Fc
145.In openssl/x509.h
146.Ft RSA *
147.Fo d2i_RSAPublicKey_bio
148.Fa "BIO *in_bio"
149.Fa "RSA **val_out"
150.Fc
151.Ft RSA *
152.Fo d2i_RSAPublicKey_fp
153.Fa "FILE *in_fp"
154.Fa "RSA **val_out"
155.Fc
156.Ft int
157.Fo i2d_RSAPublicKey_bio
158.Fa "BIO *out_bio"
159.Fa "RSA *val_in"
160.Fc
161.Ft int
162.Fo i2d_RSAPublicKey_fp
163.Fa "FILE *out_fp"
164.Fa "RSA *val_in"
165.Fc
166.Ft RSA *
167.Fo d2i_RSAPrivateKey_bio
168.Fa "BIO *in_bio"
169.Fa "RSA **val_out"
170.Fc
171.Ft RSA *
172.Fo d2i_RSAPrivateKey_fp
173.Fa "FILE *in_fp"
174.Fa "RSA **val_out"
175.Fc
176.Ft int
177.Fo i2d_RSAPrivateKey_bio
178.Fa "BIO *out_bio"
179.Fa "RSA *val_in"
180.Fc
181.Ft int
182.Fo i2d_RSAPrivateKey_fp
183.Fa "FILE *out_fp"
184.Fa "RSA *val_in"
185.Fc
186.Ft RSA *
187.Fo d2i_RSA_PUBKEY
188.Fa "RSA **val_out"
189.Fa "const unsigned char **der_in"
190.Fa "long length"
191.Fc
192.Ft int
193.Fo i2d_RSA_PUBKEY
194.Fa "RSA *val_in"
195.Fa "unsigned char **der_out"
196.Fc
197.Ft RSA *
198.Fo d2i_RSA_PUBKEY_bio
199.Fa "BIO *in_bio"
200.Fa "RSA **val_out"
201.Fc
202.Ft RSA *
203.Fo d2i_RSA_PUBKEY_fp
204.Fa "FILE *in_fp"
205.Fa "RSA **val_out"
206.Fc
207.Ft int
208.Fo i2d_RSA_PUBKEY_bio
209.Fa "BIO *out_bio"
210.Fa "RSA *val_in"
211.Fc
212.Ft int
213.Fo i2d_RSA_PUBKEY_fp
214.Fa "FILE *out_fp"
215.Fa "RSA *val_in"
216.Fc
217.Sh DESCRIPTION
218These functions decode and encode RSA private and public keys.
219For details about the semantics, examples, caveats, and bugs, see
220.Xr ASN1_item_d2i 3 .
221.Pp
222.Fn d2i_RSAPublicKey
223and
224.Fn i2d_RSAPublicKey
225decode and encode a PKCS#1
226.Vt RSAPublicKey
227structure defined in RFC 8017 appendix A.1.1.
228.Fn d2i_RSAPublicKey_bio ,
229.Fn d2i_RSAPublicKey_fp ,
230.Fn i2d_RSAPublicKey_bio ,
231and
232.Fn i2d_RSAPublicKey_fp
233are similar except that they decode or encode using a
234.Vt BIO
235or
236.Vt FILE
237pointer.
238.Pp
239.Fn d2i_RSAPrivateKey
240and
241.Fn i2d_RSAPrivateKey
242decode and encode a PKCS#1
243.Vt RSAPrivateKey
244structure defined in RFC 8017 appendix A.1.2.
245The
246.Vt RSA
247structure passed to the private key encoding functions should have
248all the PKCS#1 private key components present.
249The data encoded by the private key functions is unencrypted and
250therefore offers no private key security.
251.Fn d2i_RSAPrivateKey_bio ,
252.Fn d2i_RSAPrivateKey_fp ,
253.Fn i2d_RSAPrivateKey_bio ,
254and
255.Fn i2d_RSAPrivateKey_fp
256are similar except that they decode or encode using a
257.Vt BIO
258or
259.Vt FILE
260pointer.
261.Pp
262.Fn d2i_Netscape_RSA
263and
264.Fn i2d_Netscape_RSA
265decode and encode an RSA private key in NET format.
266These functions are present to provide compatibility with
267certain very old software.
268The NET format has some severe security weaknesses and should be
269avoided if possible.
270.Pp
271.Fn d2i_RSA_PSS_PARAMS
272and
273.Fn i2d_RSA_PSS_PARAMS
274decode and encode a PKCS#1
275.Vt RSASSA-PSS-params
276structure defined in RFC 8017 appendix A.2.3 and documented in
277.Xr RSA_PSS_PARAMS_new 3 .
278.Pp
279.Fn d2i_RSA_PUBKEY
280and
281.Fn i2d_RSA_PUBKEY
282decode and encode an RSA public key using an ASN.1
283.Vt SubjectPublicKeyInfo
284structure defined in RFC 5280 section 4.1 and documented in
285.Xr X509_PUBKEY_new 3 .
286.Fn d2i_RSA_PUBKEY_bio ,
287.Fn d2i_RSA_PUBKEY_fp ,
288.Fn i2d_RSA_PUBKEY_bio ,
289and
290.Fn i2d_RSA_PUBKEY_fp
291are similar except that they decode or encode using a
292.Vt BIO
293or
294.Vt FILE
295pointer.
296.Sh RETURN VALUES
297.Fn d2i_RSAPublicKey ,
298.Fn d2i_RSAPublicKey_bio ,
299.Fn d2i_RSAPublicKey_fp ,
300.Fn d2i_RSAPrivateKey ,
301.Fn d2i_RSAPrivateKey_bio ,
302.Fn d2i_RSAPrivateKey_fp ,
303.Fn d2i_Netscape_RSA ,
304.Fn d2i_RSA_PUBKEY ,
305.Fn d2i_RSA_PUBKEY_bio ,
306and
307.Fn d2i_RSA_PUBKEY_fp
308return a valid
309.Vt RSA
310object or
311.Dv NULL
312if an error occurs.
313.Pp
314.Fn d2i_RSA_PSS_PARAMS
315returns a valid
316.Vt RSA_PSS_PARAMS
317object or
318.Dv NULL
319if an error occurs.
320.Pp
321.Fn i2d_RSAPublicKey ,
322.Fn i2d_RSAPrivateKey ,
323.Fn i2d_Netscape_RSA ,
324.Fn i2d_RSA_PSS_PARAMS ,
325and
326.Fn i2d_RSA_PUBKEY
327return the number of bytes successfully encoded or a negative value
328if an error occurs.
329.Pp
330.Fn i2d_RSAPublicKey_bio ,
331.Fn i2d_RSAPublicKey_fp ,
332.Fn i2d_RSAPrivateKey_bio ,
333.Fn i2d_RSAPrivateKey_fp ,
334.Fn i2d_RSA_PUBKEY_bio ,
335and
336.Fn i2d_RSA_PUBKEY_fp
337return 1 for success or 0 if an error occurs.
338.Sh SEE ALSO
339.Xr ASN1_item_d2i 3 ,
340.Xr EVP_PKEY_set1_RSA 3 ,
341.Xr PEM_write_RSAPrivateKey 3 ,
342.Xr RSA_new 3 ,
343.Xr RSA_PSS_PARAMS_new 3 ,
344.Xr X509_PUBKEY_new 3
345.Sh STANDARDS
346RFC 8017: PKCS #1: RSA Cryptography Specifications
347.Pp
348RFC 5280: Internet X.509 Public Key Infrastructure Certificate and
349Certificate Revocation List (CRL) Profile,
350section 4.1: Basic Certificate Fields
351.Sh HISTORY
352.Fn d2i_RSAPublicKey ,
353.Fn i2d_RSAPublicKey ,
354.Fn d2i_RSAPrivateKey ,
355.Fn i2d_RSAPrivateKey ,
356.Fn d2i_RSAPrivateKey_fp ,
357.Fn i2d_RSAPrivateKey_fp ,
358.Fn d2i_Netscape_RSA ,
359and
360.Fn i2d_Netscape_RSA
361first appeared in SSLeay 0.5.1.
362.Fn d2i_RSAPrivateKey_bio
363and
364.Fn i2d_RSAPrivateKey_bio
365first appeared in SSLeay 0.6.0.
366.Fn d2i_RSAPublicKey_bio ,
367.Fn d2i_RSAPublicKey_fp ,
368.Fn i2d_RSAPublicKey_bio ,
369and
370.Fn i2d_RSAPublicKey_fp
371first appeared in SSLeay 0.8.1.
372These functions have been available since
373.Ox 2.4 .
374.Pp
375.Fn d2i_RSA_PUBKEY ,
376.Fn i2d_RSA_PUBKEY ,
377.Fn d2i_RSA_PUBKEY_bio ,
378.Fn d2i_RSA_PUBKEY_fp ,
379.Fn i2d_RSA_PUBKEY_bio ,
380and
381.Fn i2d_RSA_PUBKEY_fp
382first appeared in OpenSSL 0.9.5 and have been available since
383.Ox 2.7 .
384.Pp
385.Fn d2i_RSA_PSS_PARAMS
386and
387.Fn i2d_RSA_PSS_PARAMS
388first appeared in OpenSSL 1.0.1 and have been available since
389.Ox 5.3 .
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-23 13:52:49 +0000