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Avoid division on ARM side

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Aaron Tulino (Aaronjamt)
2025-12-21 17:26:43 -07:00
parent c0e82539f2
commit 223883dfe2
1 changed files with 2 additions and 2 deletions
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armsrc/seos.c
+2 -2
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@@ -406,8 +406,8 @@ void SimulateSeos(seos_emulate_req_t *msg) {
if (selected_oid) {
// Synthesized IV: half a block of random data followed by half of the CMAC of that data
uint8_t synthesized_iv[max_bs];
memset(synthesized_iv, 0, bs/2); // TODO: Maybe actually use random data?
generate_cmac(msg->privmac, synthesized_iv, bs/2, synthesized_iv+(bs/2), bs/2, msg->encr_alg);
memset(synthesized_iv, 0, bs>>1); // TODO: Maybe actually use random data?
generate_cmac(msg->privmac, synthesized_iv, bs>>1, synthesized_iv+(bs>>1), bs>>1, msg->encr_alg);
// Always exactly 0x30 bytes in length
const uint8_t reply_len = 0x30;