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man pages section 3: Extended Library Functions, Volume 4

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Updated: Thursday, June 13, 2019
 
 

sbcleartos(3TSOL)

Name

sbltos, sbsltos, sbcleartos - translate binary labels to canonical character-coded labels

Synopsis

cc [flag...] file... -ltsol [library...]
#include <tsol/label.h>

char *sbsltos(const m_label_t *label, const int len);
char *sbcleartos(const m_label_t *clearance, const int len);

Description

These functions translate binary labels into canonical strings that are clipped to the number of printable characters specified in len. Clipping is required if the number of characters of the translated string is greater than len. Clipping is done by truncating the label on the right to two characters less than the specified number of characters. A clipped indicator, “<−”, is appended to sensitivity labels and clearances. The character-coded label begins with a classification name separated with a single space character from the list of words making up the remainder of the label. The binary labels must be of the proper defined type and dominated by the process's sensitivity label. A len of 0 (zero) returns the entire string with no clipping.

The sbsltos() function translates a binary sensitivity label into a clipped string using the long form of the words and the short form of the classification name. If len is less than the minimum number of characters (three), the translation fails.

The sbcleartos() function translates a binary clearance into a clipped string using the long form of the words and the short form of the classification name. If len is less than the minimum number of characters (three), the translation fails. The translation of a clearance might not be the same as the translation of a sensitivity label. These functions use different tables of the label_encodings file which might contain different words and constraints.

The calling process must have PRIV_SYS_TRANS_LABEL in its set of effective privileges to perform label translation on labels that dominate the current process's sensitivity label.

Process Attributes

If the VIEW_EXTERNAL or VIEW_INTERNAL flags are not specified, translation 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 specifies that the ADMIN_LOW and ADMIN_HIGH labels are translated to the admin low name 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

These functions return a pointer to a statically allocated string that contains the result of the translation, or (char *)0 if the translation fails for any reason.

Examples

sbsltos()

Assume that a sensitivity label is:

UN TOP/MIDDLE/LOWER DRAWER

When clipped to ten characters it is:

UN TOP/M<−

sbcleartos()

Assume that a clearance is:

UN TOP/MIDDLE/LOWER DRAWER

When clipped to ten characters it is:

UN TOP/M<−

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(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Obsolete
MT-Level
Unsafe

These functions are obsolete and retained for ease of porting. They might be removed in a future Solaris Trusted Extensions release. Use the label_to_str(3TSOL) function instead.

See Also

libtsol(3LIB), label_to_str(3TSOL), attributes(7), labels(7)

Warnings

All these functions share the same statically allocated string storage. They are not MT-Safe. Subsequent calls to any of these functions will overwrite that string with the newly translated string.

Notes

The functionality described on this manual page is available only if the system is configured with Trusted Extensions.