// aud.hoa · AudioToolbox / AudioToolboxCore · HOASpatialDecoder · CVE-2026-112546
// HOA spatial decoder reachability probe
// C twin of the Swift POC: dlopens the audio frameworks, dlsyms the decoder symbols,
// then drives AudioConverterNew with the HOA format id.
// Build: clang -O2 -o cve-2026-112546 CVE-2026-112546.c -framework AudioToolbox -framework CoreFoundation
// Run:   ./cve-2026-112546

#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include <AudioToolbox/AudioToolbox.h>

static void probe(const char *lib, const char **symbols, int n) {
    void *h = dlopen(lib, RTLD_NOW);
    if (!h) {
        printf("x %s (%s)\n", lib, dlerror() ? dlerror() : "dlopen failed");
        return;
    }
    printf("ok %s\n", lib);
    for (int i = 0; i < n; i++) {
        printf("  %s: %s\n", symbols[i], dlsym(h, symbols[i]) ? "resolved" : "missing");
    }
}

static void audio_converter(uint32_t format, double rate, uint32_t channels) {
    AudioStreamBasicDescription in = {0};
    in.mSampleRate = rate;
    in.mFormatID = format;
    in.mFramesPerPacket = 1;
    in.mChannelsPerFrame = channels;
    AudioStreamBasicDescription out = {0};
    out.mSampleRate = rate;
    out.mFormatID = kAudioFormatLinearPCM;
    out.mFormatFlags = kAudioFormatFlagIsFloat | kAudioFormatFlagIsPacked;
    out.mBytesPerPacket = 4;
    out.mFramesPerPacket = 1;
    out.mBytesPerFrame = 4;
    out.mChannelsPerFrame = 1;
    out.mBitsPerChannel = 32;
    AudioConverterRef c = NULL;
    OSStatus st = AudioConverterNew(&in, &out, &c);
    if (c) AudioConverterDispose(c);
    char four[5] = {0};
    for (int i = 0; i < 4; i++) {
        uint8_t b = (uint8_t)(format >> (24 - 8 * i));
        four[i] = (b >= 0x20 && b < 0x7f) ? (char)b : '?';
    }
    printf("AudioConverterNew('%s', %.0f Hz, %u ch) = %d\n", four, rate, channels, (int)st);
}

int main(void) {
    const char *syms[] = {"HOASpatialDecoder", "APACHOADecoder", "UniDrcSelection", "mpddrc"};
    probe("/System/Library/Frameworks/AudioToolbox.framework/AudioToolbox", syms, 4);
    probe("/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore", syms, 4);
    probe("/System/Library/Frameworks/AudioToolbox.framework/AudioCodecs", syms, 4);
    audio_converter(0x6D686D31, 48000, 4);   // 'mhm1' HOA
    printf("CVE-2026-112546 · HOA decoder path probed\n");
    return 0;
}