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124.\" ========================================================================
125.\"
126.IX Title "ASN1_STRING_length 3"
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133.\" ========================================================================
134.\"
135.IX Title "ASN1_STRING_length 3"
|
127.TH ASN1_STRING_length 3 "2014-10-15" "1.0.1j" "OpenSSL"
| 136.TH ASN1_STRING_length 3 "2015-01-15" "1.0.1l" "OpenSSL"
|
128.\" For nroff, turn off justification. Always turn off hyphenation; it makes
129.\" way too many mistakes in technical documents.
130.if n .ad l
131.nh
132.SH "NAME"
133ASN1_STRING_dup, ASN1_STRING_cmp, ASN1_STRING_set, ASN1_STRING_length,
134ASN1_STRING_length_set, ASN1_STRING_type, ASN1_STRING_data \-
135ASN1_STRING utility functions
136.SH "SYNOPSIS"
137.IX Header "SYNOPSIS"
138.Vb 1
139\& #include <openssl/asn1.h>
140\&
141\& int ASN1_STRING_length(ASN1_STRING *x);
142\& unsigned char * ASN1_STRING_data(ASN1_STRING *x);
143\&
144\& ASN1_STRING * ASN1_STRING_dup(ASN1_STRING *a);
145\&
146\& int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *b);
147\&
148\& int ASN1_STRING_set(ASN1_STRING *str, const void *data, int len);
149\&
150\& int ASN1_STRING_type(ASN1_STRING *x);
151\&
152\& int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in);
153.Ve
154.SH "DESCRIPTION"
155.IX Header "DESCRIPTION"
156These functions allow an \fB\s-1ASN1_STRING\s0\fR structure to be manipulated.
157.PP
158\&\fIASN1_STRING_length()\fR returns the length of the content of \fBx\fR.
159.PP
160\&\fIASN1_STRING_data()\fR returns an internal pointer to the data of \fBx\fR.
161Since this is an internal pointer it should \fBnot\fR be freed or
162modified in any way.
163.PP
164\&\fIASN1_STRING_dup()\fR returns a copy of the structure \fBa\fR.
165.PP
166\&\fIASN1_STRING_cmp()\fR compares \fBa\fR and \fBb\fR returning 0 if the two
167are identical. The string types and content are compared.
168.PP
169\&\fIASN1_STRING_set()\fR sets the data of string \fBstr\fR to the buffer
170\&\fBdata\fR or length \fBlen\fR. The supplied data is copied. If \fBlen\fR
171is \-1 then the length is determined by strlen(data).
172.PP
173\&\fIASN1_STRING_type()\fR returns the type of \fBx\fR, using standard constants
174such as \fBV_ASN1_OCTET_STRING\fR.
175.PP
176\&\fIASN1_STRING_to_UTF8()\fR converts the string \fBin\fR to \s-1UTF8\s0 format, the
177converted data is allocated in a buffer in \fB*out\fR. The length of
178\&\fBout\fR is returned or a negative error code. The buffer \fB*out\fR
179should be free using \fIOPENSSL_free()\fR.
180.SH "NOTES"
181.IX Header "NOTES"
182Almost all \s-1ASN1\s0 types in OpenSSL are represented as an \fB\s-1ASN1_STRING\s0\fR
183structure. Other types such as \fB\s-1ASN1_OCTET_STRING\s0\fR are simply typedefed
184to \fB\s-1ASN1_STRING\s0\fR and the functions call the \fB\s-1ASN1_STRING\s0\fR equivalents.
185\&\fB\s-1ASN1_STRING\s0\fR is also used for some \fB\s-1CHOICE\s0\fR types which consist
186entirely of primitive string types such as \fBDirectoryString\fR and
187\&\fBTime\fR.
188.PP
189These functions should \fBnot\fR be used to examine or modify \fB\s-1ASN1_INTEGER\s0\fR
190or \fB\s-1ASN1_ENUMERATED\s0\fR types: the relevant \fB\s-1INTEGER\s0\fR or \fB\s-1ENUMERATED\s0\fR
191utility functions should be used instead.
192.PP
193In general it cannot be assumed that the data returned by \fIASN1_STRING_data()\fR
194is null terminated or does not contain embedded nulls. The actual format
195of the data will depend on the actual string type itself: for example
| 137.\" For nroff, turn off justification. Always turn off hyphenation; it makes
138.\" way too many mistakes in technical documents.
139.if n .ad l
140.nh
141.SH "NAME"
142ASN1_STRING_dup, ASN1_STRING_cmp, ASN1_STRING_set, ASN1_STRING_length,
143ASN1_STRING_length_set, ASN1_STRING_type, ASN1_STRING_data \-
144ASN1_STRING utility functions
145.SH "SYNOPSIS"
146.IX Header "SYNOPSIS"
147.Vb 1
148\& #include <openssl/asn1.h>
149\&
150\& int ASN1_STRING_length(ASN1_STRING *x);
151\& unsigned char * ASN1_STRING_data(ASN1_STRING *x);
152\&
153\& ASN1_STRING * ASN1_STRING_dup(ASN1_STRING *a);
154\&
155\& int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *b);
156\&
157\& int ASN1_STRING_set(ASN1_STRING *str, const void *data, int len);
158\&
159\& int ASN1_STRING_type(ASN1_STRING *x);
160\&
161\& int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in);
162.Ve
163.SH "DESCRIPTION"
164.IX Header "DESCRIPTION"
165These functions allow an \fB\s-1ASN1_STRING\s0\fR structure to be manipulated.
166.PP
167\&\fIASN1_STRING_length()\fR returns the length of the content of \fBx\fR.
168.PP
169\&\fIASN1_STRING_data()\fR returns an internal pointer to the data of \fBx\fR.
170Since this is an internal pointer it should \fBnot\fR be freed or
171modified in any way.
172.PP
173\&\fIASN1_STRING_dup()\fR returns a copy of the structure \fBa\fR.
174.PP
175\&\fIASN1_STRING_cmp()\fR compares \fBa\fR and \fBb\fR returning 0 if the two
176are identical. The string types and content are compared.
177.PP
178\&\fIASN1_STRING_set()\fR sets the data of string \fBstr\fR to the buffer
179\&\fBdata\fR or length \fBlen\fR. The supplied data is copied. If \fBlen\fR
180is \-1 then the length is determined by strlen(data).
181.PP
182\&\fIASN1_STRING_type()\fR returns the type of \fBx\fR, using standard constants
183such as \fBV_ASN1_OCTET_STRING\fR.
184.PP
185\&\fIASN1_STRING_to_UTF8()\fR converts the string \fBin\fR to \s-1UTF8\s0 format, the
186converted data is allocated in a buffer in \fB*out\fR. The length of
187\&\fBout\fR is returned or a negative error code. The buffer \fB*out\fR
188should be free using \fIOPENSSL_free()\fR.
189.SH "NOTES"
190.IX Header "NOTES"
191Almost all \s-1ASN1\s0 types in OpenSSL are represented as an \fB\s-1ASN1_STRING\s0\fR
192structure. Other types such as \fB\s-1ASN1_OCTET_STRING\s0\fR are simply typedefed
193to \fB\s-1ASN1_STRING\s0\fR and the functions call the \fB\s-1ASN1_STRING\s0\fR equivalents.
194\&\fB\s-1ASN1_STRING\s0\fR is also used for some \fB\s-1CHOICE\s0\fR types which consist
195entirely of primitive string types such as \fBDirectoryString\fR and
196\&\fBTime\fR.
197.PP
198These functions should \fBnot\fR be used to examine or modify \fB\s-1ASN1_INTEGER\s0\fR
199or \fB\s-1ASN1_ENUMERATED\s0\fR types: the relevant \fB\s-1INTEGER\s0\fR or \fB\s-1ENUMERATED\s0\fR
200utility functions should be used instead.
201.PP
202In general it cannot be assumed that the data returned by \fIASN1_STRING_data()\fR
203is null terminated or does not contain embedded nulls. The actual format
204of the data will depend on the actual string type itself: for example
|
196for and IA5String the data will be \s-1ASCII\s0, for a BMPString two bytes per
| 205for and IA5String the data will be \s-1ASCII,\s0 for a BMPString two bytes per
|
197character in big endian format, UTF8String will be in \s-1UTF8\s0 format.
198.PP
199Similar care should be take to ensure the data is in the correct format
200when calling \fIASN1_STRING_set()\fR.
201.SH "RETURN VALUES"
202.IX Header "RETURN VALUES"
203.SH "SEE ALSO"
204.IX Header "SEE ALSO"
205\&\fIERR_get_error\fR\|(3)
206.SH "HISTORY"
207.IX Header "HISTORY"
| 206character in big endian format, UTF8String will be in \s-1UTF8\s0 format.
207.PP
208Similar care should be take to ensure the data is in the correct format
209when calling \fIASN1_STRING_set()\fR.
210.SH "RETURN VALUES"
211.IX Header "RETURN VALUES"
212.SH "SEE ALSO"
213.IX Header "SEE ALSO"
214\&\fIERR_get_error\fR\|(3)
215.SH "HISTORY"
216.IX Header "HISTORY"
|