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MEDIUM: h1: use ha_random64_pair_hashed() for the WebSocket key

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Instead of using two consecutive calls to ha_random64(), let's use the
cleaner and safer ha_random64_pair_hashed(). This way the internal
PRNG state will not leak into the emitted headers.
This commit is contained in:
Willy Tarreau 2026-05-25 18:23:30 +02:00
parent 07432a639b
commit b88d201ed6
1 changed files with 2 additions and 1 deletions
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src/h1.c
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@ -1248,9 +1248,10 @@ int h1_headers_to_hdr_list(char *start, const char *stop,
void h1_generate_random_ws_input_key(char key_out[25])
{
/* generate a random websocket key */
const uint64_t rand1 = ha_random64(), rand2 = ha_random64();
uint64_t rand1, rand2;
char key[16];
ha_random64_pair_hashed(&rand1, &rand2);
memcpy(key, &rand1, 8);
memcpy(&key[8], &rand2, 8);
a2base64(key, 16, key_out, 25);