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Edit File : ASN1_STRING_data.3 \| Size : 7.02 KB
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" 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" ASN1_STRING_dup, ASN1_STRING_cmp, ASN1_STRING_set, ASN1_STRING_length, ASN1_STRING_length_set, ASN1_STRING_type, ASN1_STRING_data, ASN1_STRING_to_UTF8 \- ASN1_STRING utility functions .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/asn1.h> \& \& int ASN1_STRING_length(ASN1_STRING x); \& unsigned char * ASN1_STRING_data(ASN1_STRING x); \& \& ASN1_STRING ASN1_STRING_dup(ASN1_STRING a); \& \& int ASN1_STRING_cmp(ASN1_STRING a, ASN1_STRING b); \& \& int ASN1_STRING_set(ASN1_STRING str, const void data, int len); \& \& int ASN1_STRING_type(ASN1_STRING x); \& \& int ASN1_STRING_to_UTF8(unsigned char *out, ASN1_STRING in); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" These functions allow an \fB\s-1ASN1_STRING\s0\fR structure to be manipulated. .PP \&\fBASN1_STRING_length()\fR returns the length of the content of \fBx\fR. .PP \&\fBASN1_STRING_data()\fR returns an internal pointer to the data of \fBx\fR. Since this is an internal pointer it should \fBnot\fR be freed or modified in any way. .PP \&\fBASN1_STRING_dup()\fR returns a copy of the structure \fBa\fR. .PP \&\fBASN1_STRING_cmp()\fR compares \fBa\fR and \fBb\fR returning 0 if the two are identical. The string types and content are compared. .PP \&\fBASN1_STRING_set()\fR sets the data of string \fBstr\fR to the buffer \&\fBdata\fR or length \fBlen\fR. The supplied data is copied. If \fBlen\fR is \-1 then the length is determined by strlen(data). .PP \&\fBASN1_STRING_type()\fR returns the type of \fBx\fR, using standard constants such as \fBV_ASN1_OCTET_STRING\fR. .PP \&\fBASN1_STRING_to_UTF8()\fR converts the string \fBin\fR to \s-1UTF8\s0 format, the converted data is allocated in a buffer in \fBout\fR. The length of \&\fBout\fR is returned or a negative error code. The buffer \fBout\fR should be free using \fBOPENSSL_free()\fR. .SH "NOTES" .IX Header "NOTES" Almost all \s-1ASN1\s0 types in OpenSSL are represented as an \fB\s-1ASN1_STRING\s0\fR structure. Other types such as \fB\s-1ASN1_OCTET_STRING\s0\fR are simply typedefed to \fB\s-1ASN1_STRING\s0\fR and the functions call the \fB\s-1ASN1_STRING\s0\fR equivalents. \&\fB\s-1ASN1_STRING\s0\fR is also used for some \fB\s-1CHOICE\s0\fR types which consist entirely of primitive string types such as \fBDirectoryString\fR and \&\fBTime\fR. .PP These functions should \fBnot\fR be used to examine or modify \fB\s-1ASN1_INTEGER\s0\fR or \fB\s-1ASN1_ENUMERATED\s0\fR types: the relevant \fB\s-1INTEGER\s0\fR or \fB\s-1ENUMERATED\s0\fR utility functions should be used instead. .PP In general it cannot be assumed that the data returned by \fBASN1_STRING_data()\fR is null terminated or does not contain embedded nulls. The actual format of the data will depend on the actual string type itself: for example for an IA5String the data will be \s-1ASCII,\s0 for a BMPString two bytes per character in big endian format, and for an UTF8String it will be in \s-1UTF8\s0 format. .PP Similar care should be take to ensure the data is in the correct format when calling \fBASN1_STRING_set()\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" Back

Edit File : ASN1_STRING_data.3 | Size : 7.02 KB

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.\" ========================================================================
.\"
.IX Title "ASN1_STRING_length 3"
.TH ASN1_STRING_length 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ASN1_STRING_dup, ASN1_STRING_cmp, ASN1_STRING_set, ASN1_STRING_length,
ASN1_STRING_length_set, ASN1_STRING_type, ASN1_STRING_data, ASN1_STRING_to_UTF8 \-
ASN1_STRING utility functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/asn1.h>
\&
\& int ASN1_STRING_length(ASN1_STRING *x);
\& unsigned char * ASN1_STRING_data(ASN1_STRING *x);
\&
\& ASN1_STRING * ASN1_STRING_dup(ASN1_STRING *a);
\&
\& int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *b);
\&
\& int ASN1_STRING_set(ASN1_STRING *str, const void *data, int len);
\&
\& int ASN1_STRING_type(ASN1_STRING *x);
\&
\& int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
These functions allow an \fB\s-1ASN1_STRING\s0\fR structure to be manipulated.
.PP
\&\fBASN1_STRING_length()\fR returns the length of the content of \fBx\fR.
.PP
\&\fBASN1_STRING_data()\fR returns an internal pointer to the data of \fBx\fR.
Since this is an internal pointer it should \fBnot\fR be freed or
modified in any way.
.PP
\&\fBASN1_STRING_dup()\fR returns a copy of the structure \fBa\fR.
.PP
\&\fBASN1_STRING_cmp()\fR compares \fBa\fR and \fBb\fR returning 0 if the two
are identical. The string types and content are compared.
.PP
\&\fBASN1_STRING_set()\fR sets the data of string \fBstr\fR to the buffer
\&\fBdata\fR or length \fBlen\fR. The supplied data is copied. If \fBlen\fR
is \-1 then the length is determined by strlen(data).
.PP
\&\fBASN1_STRING_type()\fR returns the type of \fBx\fR, using standard constants
such as \fBV_ASN1_OCTET_STRING\fR.
.PP
\&\fBASN1_STRING_to_UTF8()\fR converts the string \fBin\fR to \s-1UTF8\s0 format, the
converted data is allocated in a buffer in \fB*out\fR. The length of
\&\fBout\fR is returned or a negative error code. The buffer \fB*out\fR
should be free using \fBOPENSSL_free()\fR.
.SH "NOTES"
.IX Header "NOTES"
Almost all \s-1ASN1\s0 types in OpenSSL are represented as an \fB\s-1ASN1_STRING\s0\fR
structure. Other types such as \fB\s-1ASN1_OCTET_STRING\s0\fR are simply typedefed
to \fB\s-1ASN1_STRING\s0\fR and the functions call the \fB\s-1ASN1_STRING\s0\fR equivalents.
\&\fB\s-1ASN1_STRING\s0\fR is also used for some \fB\s-1CHOICE\s0\fR types which consist
entirely of primitive string types such as \fBDirectoryString\fR and
\&\fBTime\fR.
.PP
These functions should \fBnot\fR be used to examine or modify \fB\s-1ASN1_INTEGER\s0\fR
or \fB\s-1ASN1_ENUMERATED\s0\fR types: the relevant \fB\s-1INTEGER\s0\fR or \fB\s-1ENUMERATED\s0\fR
utility functions should be used instead.
.PP
In general it cannot be assumed that the data returned by \fBASN1_STRING_data()\fR
is null terminated or does not contain embedded nulls. The actual format
of the data will depend on the actual string type itself: for example
for an IA5String the data will be \s-1ASCII,\s0 for a BMPString two bytes per
character in big endian format, and for an UTF8String it will be in \s-1UTF8\s0 format.
.PP
Similar care should be take to ensure the data is in the correct format
when calling \fBASN1_STRING_set()\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBERR_get_error\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"

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