my reversal of the CMU binary bomb

bomb.c

// NOTE: this code will _not_ compile
void phase_1(char ** input) {
    if (input != "Public speaking is very easy.")
        explode_bomb();
    else
        return;
}

void phase_2(char ** input) {
    int ar[6];
    ar = read_six_numbers(input);
    if (ar[0] != 1)
        explode_bomb();
    for (int i = 1; i <= 5; i++)
        if(a[i] != ((i+1) * a[i-1]))
            explode_bomb();
    return;
}

void phase_3(char ** input){
    char ** buffer;
    int c;
    if (sscanf(input, "%d %c %d", buffer) <= 2)
        explode_bomb();
    if (buffer[0] > 7)
        explode_bomb();
    // jmp    DWORD PTR [eax*4+0x80497e8]  
    switch (buffer[0]) {
        case 1:
                c = 0x62;
                if (buffer[2] != 214)
                    explode_bomb();
                break;
        case 2:
                c = 0x62;
                if (buffer[2] != 755)
                    explode_bomb();
                break;
        case 3:
                c = 0x6b
                if (buffer[2] != 251)
                    explode_bomb();
                break;
        case 4:
                c = 0x6f;
                if (buffer[2] != 160)
                    explode_bomb();
                break;
        case 5:
                c = 0x74;
                if (buffer[2] != 458)
                    explode_bomb();
                break;
        case 6:
                c = 0x76;
                if (buffer[2] != 780)
                    explode_bomb();
        case 7:
                c = 0x78;
                if (buffer[2] != 524)
                    explode_bomb();
                break;
    }
    if (buffer[1] != digit)
        explode_bomb();
    return;
}

int func4(int n) {
    if (n <= 1)
        return n;
    else {
        return func4(n-1) + func4(n-2);
    }
}

void phase_4(char ** input){
    int d;
    if (sscanf(input, "%d", d) != 1)
        explode_bomb();
    if (d <= 0)
        explode_bomb();
    if (func4(d) != 0x37)
        explode_bomb();
    return;
}

void phase_5(char ** input){
    if (string_length(input) != 6)
        explode_bomb();
    while ( ebx <= 6 ){
    
        // ?
    }
}