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Abort disabling old PEM keys on I/O errors.
[tinc]
/
src
/
conf.c
diff --git
a/src/conf.c
b/src/conf.c
index
f5f6c3a
..
c5467d2
100644
(file)
--- a/
src/conf.c
+++ b/
src/conf.c
@@
-459,24
+459,33
@@
bool disable_old_keys(FILE *f) {
rewind(f);
pos = ftell(f);
rewind(f);
pos = ftell(f);
+ if(pos < 0)
+ return false;
+
while(fgets(buf, sizeof buf, f)) {
if(!strncmp(buf, "-----BEGIN RSA", 14)) {
buf[11] = 'O';
buf[12] = 'L';
buf[13] = 'D';
while(fgets(buf, sizeof buf, f)) {
if(!strncmp(buf, "-----BEGIN RSA", 14)) {
buf[11] = 'O';
buf[12] = 'L';
buf[13] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
+ if(fseek(f, pos, SEEK_SET))
+ break;
+ if(fputs(buf, f) <= 0)
+ break;
disabled = true;
}
else if(!strncmp(buf, "-----END RSA", 12)) {
buf[ 9] = 'O';
buf[10] = 'L';
buf[11] = 'D';
disabled = true;
}
else if(!strncmp(buf, "-----END RSA", 12)) {
buf[ 9] = 'O';
buf[10] = 'L';
buf[11] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
+ if(fseek(f, pos, SEEK_SET))
+ break;
+ if(fputs(buf, f) <= 0)
+ break;
disabled = true;
}
pos = ftell(f);
disabled = true;
}
pos = ftell(f);
+ if(pos < 0)
+ break;
}
return disabled;
}
return disabled;