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| 1 | .\" $OpenBSD: d2i_ASN1_OBJECT.3,v 1.9 2018/04/25 15:17:52 schwarze Exp $ | ||
| 2 | .\" OpenSSL 05ea606a May 20 20:52:46 2016 -0400 | ||
| 3 | .\" | ||
| 4 | .\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org> | ||
| 5 | .\" | ||
| 6 | .\" Permission to use, copy, modify, and distribute this software for any | ||
| 7 | .\" purpose with or without fee is hereby granted, provided that the above | ||
| 8 | .\" copyright notice and this permission notice appear in all copies. | ||
| 9 | .\" | ||
| 10 | .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
| 11 | .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
| 12 | .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
| 13 | .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
| 14 | .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
| 15 | .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
| 16 | .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
| 17 | .\" | ||
| 18 | .Dd $Mdocdate: April 25 2018 $ | ||
| 19 | .Dt D2I_ASN1_OBJECT 3 | ||
| 20 | .Os | ||
| 21 | .Sh NAME | ||
| 22 | .Nm d2i_ASN1_OBJECT , | ||
| 23 | .Nm i2d_ASN1_OBJECT | ||
| 24 | .Nd decode and encode ASN.1 object identifiers | ||
| 25 | .Sh SYNOPSIS | ||
| 26 | .In openssl/asn1.h | ||
| 27 | .Ft ASN1_OBJECT * | ||
| 28 | .Fo d2i_ASN1_OBJECT | ||
| 29 | .Fa "ASN1_OBJECT **val_out" | ||
| 30 | .Fa "unsigned char **der_in" | ||
| 31 | .Fa "long length" | ||
| 32 | .Fc | ||
| 33 | .Ft int | ||
| 34 | .Fo i2d_ASN1_OBJECT | ||
| 35 | .Fa "const ASN1_OBJECT *val_in" | ||
| 36 | .Fa "unsigned char **der_out" | ||
| 37 | .Fc | ||
| 38 | .Sh DESCRIPTION | ||
| 39 | These functions decode and encode ASN.1 object identifiers. | ||
| 40 | For details about the semantics, examples, caveats, and bugs, see | ||
| 41 | .Xr ASN1_item_d2i 3 . | ||
| 42 | .Pp | ||
| 43 | The objects returned from | ||
| 44 | .Fn d2i_ASN1_OBJECT | ||
| 45 | and the data contained in them are always marked as dynamically | ||
| 46 | allocated, so when they are no longer needed, | ||
| 47 | .Xr ASN1_OBJECT_free 3 | ||
| 48 | can be called on them. | ||
| 49 | .Pp | ||
| 50 | If reusing an existing object is attempted but the | ||
| 51 | .Pf * Fa val_out | ||
| 52 | passed in points to an object that is not marked as dynamically | ||
| 53 | allocated, then the existing object is left untouched and | ||
| 54 | .Fn d2i_ASN1_OBJECT | ||
| 55 | behaves as if | ||
| 56 | .Pf * Fa val_out | ||
| 57 | would have been | ||
| 58 | .Dv NULL : | ||
| 59 | A new object is allocated and a pointer to it is both stored in | ||
| 60 | .Pf * Fa val_out | ||
| 61 | and returned. | ||
| 62 | .Sh RETURN VALUES | ||
| 63 | .Fn d2i_ASN1_OBJECT | ||
| 64 | returns an | ||
| 65 | .Vt ASN1_OBJECT | ||
| 66 | object or | ||
| 67 | .Dv NULL | ||
| 68 | if an error occurs. | ||
| 69 | .Pp | ||
| 70 | .Fn i2d_ASN1_OBJECT | ||
| 71 | returns the number of bytes successfully encoded | ||
| 72 | or a value <= 0 if an error occurs. | ||
| 73 | .Sh SEE ALSO | ||
| 74 | .Xr ASN1_item_d2i 3 , | ||
| 75 | .Xr ASN1_OBJECT_new 3 , | ||
| 76 | .Xr OBJ_nid2obj 3 | ||
| 77 | .Sh HISTORY | ||
| 78 | .Fn d2i_ASN1_OBJECT | ||
| 79 | and | ||
| 80 | .Fn i2d_ASN1_OBJECT | ||
| 81 | first appeared in SSLeay 0.5.1 and have been available since | ||
| 82 | .Ox 2.4 . | ||
| 83 | .Sh CAVEATS | ||
| 84 | .Fn d2i_ASN1_OBJECT | ||
| 85 | never sets the long and short names of the object, not even if the | ||
| 86 | object identifier matches one that is built into the library. | ||
| 87 | To find the names of an object identifier parsed from DER or BER | ||
| 88 | input, call | ||
| 89 | .Xr OBJ_obj2nid 3 | ||
| 90 | on the returned object, and then | ||
| 91 | .Xr OBJ_nid2sn 3 | ||
| 92 | and | ||
| 93 | .Xr OBJ_nid2ln 3 | ||
| 94 | on the result. | ||
| 95 | .Sh BUGS | ||
| 96 | When reusing a dynamically allocated object that contains dynamically | ||
| 97 | allocated names, the old names are not freed and the memory containing | ||
| 98 | them is leaked. | ||
