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Diffstat (limited to 'secure/lib/libcrypto/man/OBJ_nid2obj.3')
| -rw-r--r-- | secure/lib/libcrypto/man/OBJ_nid2obj.3 | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/OBJ_nid2obj.3 b/secure/lib/libcrypto/man/OBJ_nid2obj.3 new file mode 100644 index 0000000..878b605 --- /dev/null +++ b/secure/lib/libcrypto/man/OBJ_nid2obj.3 @@ -0,0 +1,290 @@ +.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +OBJ_nid2obj, OBJ_nid2ln, OBJ_nid2sn, OBJ_obj2nid, OBJ_txt2nid, OBJ_ln2nid, OBJ_sn2nid, +OBJ_cmp, OBJ_dup, OBJ_txt2obj, OBJ_obj2txt, OBJ_create, OBJ_cleanup \- ASN1 object utility +functions +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/objects.h> +\& +\& ASN1_OBJECT * OBJ_nid2obj(int n); +\& const char * OBJ_nid2ln(int n); +\& const char * OBJ_nid2sn(int n); +\& +\& int OBJ_obj2nid(const ASN1_OBJECT *o); +\& int OBJ_ln2nid(const char *ln); +\& int OBJ_sn2nid(const char *sn); +\& +\& int OBJ_txt2nid(const char *s); +\& +\& ASN1_OBJECT * OBJ_txt2obj(const char *s, int no_name); +\& int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name); +\& +\& int OBJ_cmp(const ASN1_OBJECT *a,const ASN1_OBJECT *b); +\& ASN1_OBJECT * OBJ_dup(const ASN1_OBJECT *o); +\& +\& int OBJ_create(const char *oid,const char *sn,const char *ln); +\& void OBJ_cleanup(void); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The \s-1ASN1\s0 object utility functions process \s-1ASN1_OBJECT\s0 structures which are +a representation of the \s-1ASN1 OBJECT IDENTIFIER \s0(\s-1OID\s0) type. +.PP +\&\fIOBJ_nid2obj()\fR, \fIOBJ_nid2ln()\fR and \fIOBJ_nid2sn()\fR convert the \s-1NID \s0\fBn\fR to +an \s-1ASN1_OBJECT\s0 structure, its long name and its short name respectively, +or \fB\s-1NULL\s0\fR is an error occurred. +.PP +\&\fIOBJ_obj2nid()\fR, \fIOBJ_ln2nid()\fR, \fIOBJ_sn2nid()\fR return the corresponding \s-1NID\s0 +for the object \fBo\fR, the long name <ln> or the short name <sn> respectively +or NID_undef if an error occurred. +.PP +\&\fIOBJ_txt2nid()\fR returns \s-1NID\s0 corresponding to text string <s>. \fBs\fR can be +a long name, a short name or the numerical respresentation of an object. +.PP +\&\fIOBJ_txt2obj()\fR converts the text string \fBs\fR into an \s-1ASN1_OBJECT\s0 structure. +If \fBno_name\fR is 0 then long names and short names will be interpreted +as well as numerical forms. If \fBno_name\fR is 1 only the numerical form +is acceptable. +.PP +\&\fIOBJ_obj2txt()\fR converts the \fB\s-1ASN1_OBJECT\s0\fR \fBa\fR into a textual representation. +The representation is written as a null terminated string to \fBbuf\fR +at most \fBbuf_len\fR bytes are written, truncating the result if necessary. +The total amount of space required is returned. If \fBno_name\fR is 0 then +if the object has a long or short name then that will be used, otherwise +the numerical form will be used. If \fBno_name\fR is 1 then the numerical +form will always be used. +.PP +\&\fIOBJ_cmp()\fR compares \fBa\fR to \fBb\fR. If the two are identical 0 is returned. +.PP +\&\fIOBJ_dup()\fR returns a copy of \fBo\fR. +.PP +\&\fIOBJ_create()\fR adds a new object to the internal table. \fBoid\fR is the +numerical form of the object, \fBsn\fR the short name and \fBln\fR the +long name. A new \s-1NID\s0 is returned for the created object. +.PP +\&\fIOBJ_cleanup()\fR cleans up OpenSSLs internal object table: this should +be called before an application exits if any new objects were added +using \fIOBJ_create()\fR. +.SH "NOTES" +.IX Header "NOTES" +Objects in OpenSSL can have a short name, a long name and a numerical +identifier (\s-1NID\s0) associated with them. A standard set of objects is +represented in an internal table. The appropriate values are defined +in the header file \fBobjects.h\fR. +.PP +For example the \s-1OID\s0 for commonName has the following definitions: +.PP +.Vb 3 +\& #define SN_commonName "CN" +\& #define LN_commonName "commonName" +\& #define NID_commonName 13 +.Ve +.PP +New objects can be added by calling \fIOBJ_create()\fR. +.PP +Table objects have certain advantages over other objects: for example +their NIDs can be used in a C language switch statement. They are +also static constant structures which are shared: that is there +is only a single constant structure for each table object. +.PP +Objects which are not in the table have the \s-1NID\s0 value NID_undef. +.PP +Objects do not need to be in the internal tables to be processed, +the functions \fIOBJ_txt2obj()\fR and \fIOBJ_obj2txt()\fR can process the numerical +form of an \s-1OID.\s0 +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Create an object for \fBcommonName\fR: +.PP +.Vb 2 +\& ASN1_OBJECT *o; +\& o = OBJ_nid2obj(NID_commonName); +.Ve +.PP +Check if an object is \fBcommonName\fR +.PP +.Vb 2 +\& if (OBJ_obj2nid(obj) == NID_commonName) +\& /* Do something */ +.Ve +.PP +Create a new \s-1NID\s0 and initialize an object from it: +.PP +.Vb 3 +\& int new_nid; +\& ASN1_OBJECT *obj; +\& new_nid = OBJ_create("1.2.3.4", "NewOID", "New Object Identifier"); +\& +\& obj = OBJ_nid2obj(new_nid); +.Ve +.PP +Create a new object directly: +.PP +.Vb 1 +\& obj = OBJ_txt2obj("1.2.3.4", 1); +.Ve +.SH "BUGS" +.IX Header "BUGS" +\&\fIOBJ_obj2txt()\fR is awkward and messy to use: it doesn't follow the +convention of other OpenSSL functions where the buffer can be set +to \fB\s-1NULL\s0\fR to determine the amount of data that should be written. +Instead \fBbuf\fR must point to a valid buffer and \fBbuf_len\fR should +be set to a positive value. A buffer length of 80 should be more +than enough to handle any \s-1OID\s0 encountered in practice. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIOBJ_nid2obj()\fR returns an \fB\s-1ASN1_OBJECT\s0\fR structure or \fB\s-1NULL\s0\fR is an +error occurred. +.PP +\&\fIOBJ_nid2ln()\fR and \fIOBJ_nid2sn()\fR returns a valid string or \fB\s-1NULL\s0\fR +on error. +.PP +\&\fIOBJ_obj2nid()\fR, \fIOBJ_ln2nid()\fR, \fIOBJ_sn2nid()\fR and \fIOBJ_txt2nid()\fR return +a \s-1NID\s0 or \fBNID_undef\fR on error. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIERR_get_error\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" +\&\s-1TBA\s0 |
