bltos(3TSOL) Trusted Extensions Library Functions bltos(3TSOL)NAME
bltos, bsltos, bcleartos - translate binary labels to character coded
labels
SYNOPSIS
cc [flag...] file... -ltsol [library...]
#include <tsol/label.h>
int bsltos(const m_label_t *label, char **string,
const int str_len, const int flags);
int bcleartos(const m_label_t *label, char **string,
const int str_len, const int flags);
DESCRIPTION
These functions translate binary labels into strings controlled by the
value of the flags parameter.
The bsltos() function translates a binary sensitivity label into a
string. The applicable flags are LONG_CLASSIFICATION or SHORT_CLASSIFI‐
CATION, LONG_WORDS or SHORT_WORDS, VIEW_EXTERNAL or VIEW_INTERNAL, and
NO_CLASSIFICATION. A flags value 0 is equivalent to (SHORT_CLASSIFICA‐
TION | LONG_WORDS).
The bcleartos() function translates a binary clearance into a string.
The applicable flags are LONG_CLASSIFICATION or SHORT_CLASSIFICATION,
LONG_WORDS or SHORT_WORDS, VIEW_EXTERNAL or VIEW_INTERNAL, and NO_CLAS‐
SIFICATION. A flags value 0 is equivalent to (SHORT_CLASSIFICATION |
LONG_WORDS). The translation of a clearance might not be the same as
the translation of a sensitivity label. These functions use different
label_encodings file tables that might contain different words and con‐
straints.
The calling process must have PRIV_SYS_TRANS_LABEL in its set of effec‐
tive privileges to perform label translation on labels that dominate
the current process's sensitivity label.
The generic form of an output character-coded label is:
CLASSIFICATION WORD1 WORD2 WORD3/WORD4 SUFFIX PREFIX WORD5/WORD6
Capital letters are used to display all CLASSIFICATION names and WORDs.
The ` ' (space) character separates classifications and words from
other words in all character-coded labels except where multiple words
that require the same PREFIX or SUFFIX are present, in which case the
multiple words are separated from each other by the `/' (slash) charac‐
ter.
The string argument can point to either a pointer to pre-allocated mem‐
ory, or the value (char *)0. If string points to a pointer to pre-allo‐
cated memory, then str_len indicates the size of that memory. If
string points to the value (char *)0, memory is allocated using mal‐
loc() to contain the translated character-coded labels. The translated
label is copied into allocated or pre-allocated memory.
The flags argument is 0 or the logical sum of the following:
LONG_WORDS Translate using long names of words defined in
label.
SHORT_WORDS Translate using short names of words defined in
label. If no short name is defined in the
label_encodings file for a word, the long name
is used.
LONG_CLASSIFICATION Translate using long name of classification
defined in label.
SHORT_CLASSIFICATION Translate using short name of classification
defined in label.
ACCESS_RELATED Translate only access-related entries defined
in information label label.
VIEW_EXTERNAL Translate ADMIN_LOW and ADMIN_HIGH labels to
the lowest and highest labels defined in the
label_encodings file.
VIEW_INTERNAL Translate ADMIN_LOW and ADMIN_HIGH labels to
the admin low name and admin high name strings
specified in the label_encodings file. If no
strings are specified, the strings "ADMIN_LOW"
and "ADMIN_HIGH" are used.
NO_CLASSIFICATION Do not translate classification defined in
label.
Process Attributes
If the VIEW_EXTERNAL or VIEW_INTERNAL flags are not specified, transla‐
tion of ADMIN_LOW and ADMIN_HIGH labels is controlled by the label view
process attribute flags. If no label view process attribute flags are
defined, their translation is controlled by the label view configured
in the label_encodings file. A value of External specifies that
ADMIN_LOW and ADMIN_HIGH labels are mapped to the lowest and highest
labels defined in the label_encodings file. A value of Internal speci‐
fies that the ADMIN_LOW and ADMIN_HIGH labels are translated to the
admin low and admin high name strings specified in the label_encodings
file. If no such names are specified, the strings "ADMIN_LOW" and
"ADMIN_HIGH" are used.
RETURN VALUES
Upon successful completion, the bsltos() and bcleartos() functions
return the length of the character-coded label, including the NULL ter‐
minator.
If the label is not of the valid defined required type, if the label is
not dominated by the process sensitivity label and the process does not
have PRIV_SYS_TRANS_LABEL in its set of effective privileges, or if the
label_encodings file is inaccessible, these functions return −1.
If memory cannot be allocated for the return string or if the pre-allo‐
cated return string memory is insufficient to hold the string, these
functions return 0. The value of the pre-allocated string is set to the
NULL string (*string[0]=' 0';).
FILES
/etc/security/tsol/label_encodings
The label encodings file contains the classification names, words,
constraints, and values for the defined labels of this system.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Obsolete │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe with exceptions │
└─────────────────────────────┴─────────────────────────────┘
The bsltos() and bcleartos() functions are Obsolete. Use the
label_to_str(3TSOL) function instead.
SEE ALSOfree(3C), label_to_str(3TSOL), libtsol(3LIB), malloc(3C), label_encod‐
ings(4), attributes(5)NOTES
The functionality described on this manual page is available only if
the system is configured with Trusted Extensions.
If memory is allocated by these functions, the caller must free the
memory with free(3C) when the memory is no longer in use.
SunOS 5.10 20 Jul 2007 bltos(3TSOL)
