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PPP, magic, enables building without PPP_MD5_RANDM support

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The only API difference with and without the PPP_MD5_RANDM support is the
availability of the random_bytes() function. Added a random_bytes()
function on top of magic() when PPP_MD5_RANDM support is not enabled,
thus allowing builds for both cases.

PPP_MD5_RANDM is still enabled by default (it was mandatory) if a protocol
using encryption is enabled, such as CHAP, EAP, or L2TP auth support.
This commit is contained in:
Sylvain Rochet
2015-08-30 18:41:41 +02:00
parent ced7bef274
commit d0fa8acf86
3 changed files with 24 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/netif/ppp/magic.c
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@@ -209,7 +209,7 @@ static u32_t magic_randomseed = 0; /* Seed used for random number generatio
* operational. Thus we call it again on the first random
* event.
*/
void magic_init() {
void magic_init(void) {
magic_randomseed += sys_jiffies();
/* Initialize the Borland random number generator. */
@@ -249,10 +249,24 @@ void magic_randomize(void) {
* operator or network events in which case it will be pseudo random
* seeded by the real time clock.
*/
u32_t magic() {
u32_t magic(void) {
return ((((u32_t)rand() << 16) + rand()) + magic_randomseed);
}
/*
* random_bytes - Fill a buffer with random bytes.
*/
void random_bytes(unsigned char *buf, u32_t buf_len) {
u32_t new_rand, n;
while (buf_len > 0) {
new_rand = magic();
n = LWIP_MIN(buf_len, sizeof(new_rand));
MEMCPY(buf, &new_rand, n);
buf += n;
buf_len -= n;
}
}
#endif /* PPP_MD5_RANDM */
/*