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Another utility function, to free a string containing sensitive data.

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[originally from svn r9319]
This commit is contained in:
Simon Tatham 2011-10-02 14:03:47 +00:00
parent 535d77abf0
commit ff5a9c77fd
2 changed files with 9 additions and 0 deletions
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8
misc.c
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@ -200,6 +200,14 @@ char *dupcat(const char *s1, ...)
return p; return p;
} }
void burnstr(char *string) /* sfree(str), only clear it first */
{
if (string) {
memset(string, 0, strlen(string));
sfree(string);
}
}
/* /*
* Do an sprintf(), but into a custom-allocated buffer. * Do an sprintf(), but into a custom-allocated buffer.
* *

1
misc.h
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@ -28,6 +28,7 @@ char *dupstr(const char *s);
char *dupcat(const char *s1, ...); char *dupcat(const char *s1, ...);
char *dupprintf(const char *fmt, ...); char *dupprintf(const char *fmt, ...);
char *dupvprintf(const char *fmt, va_list ap); char *dupvprintf(const char *fmt, va_list ap);
void burnstr(char *string);
char *fgetline(FILE *fp); char *fgetline(FILE *fp);