ParagonIE_Sodium_Core_Curve25519::sc25519_mul( string $a, string $b ): string

2913    public static function sc25519_mul($a, $b)2914    {2915        //    int64_t a0  = 2097151 & load_3(a);2916        //    int64_t a1  = 2097151 & (load_4(a + 2) >> 5);2917        //    int64_t a2  = 2097151 & (load_3(a + 5) >> 2);2918        //    int64_t a3  = 2097151 & (load_4(a + 7) >> 7);2919        //    int64_t a4  = 2097151 & (load_4(a + 10) >> 4);2920        //    int64_t a5  = 2097151 & (load_3(a + 13) >> 1);2921        //    int64_t a6  = 2097151 & (load_4(a + 15) >> 6);2922        //    int64_t a7  = 2097151 & (load_3(a + 18) >> 3);2923        //    int64_t a8  = 2097151 & load_3(a + 21);2924        //    int64_t a9  = 2097151 & (load_4(a + 23) >> 5);2925        //    int64_t a10 = 2097151 & (load_3(a + 26) >> 2);2926        //    int64_t a11 = (load_4(a + 28) >> 7);2927        $a0  = 2097151 &  self::load_3(self::substr($a, 0, 3));2928        $a1  = 2097151 & (self::load_4(self::substr($a, 2, 4)) >> 5);2929        $a2  = 2097151 & (self::load_3(self::substr($a, 5, 3)) >> 2);2930        $a3  = 2097151 & (self::load_4(self::substr($a, 7, 4)) >> 7);2931        $a4  = 2097151 & (self::load_4(self::substr($a, 10, 4)) >> 4);2932        $a5  = 2097151 & (self::load_3(self::substr($a, 13, 3)) >> 1);2933        $a6  = 2097151 & (self::load_4(self::substr($a, 15, 4)) >> 6);2934        $a7  = 2097151 & (self::load_3(self::substr($a, 18, 3)) >> 3);2935        $a8  = 2097151 &  self::load_3(self::substr($a, 21, 3));2936        $a9  = 2097151 & (self::load_4(self::substr($a, 23, 4)) >> 5);2937        $a10 = 2097151 & (self::load_3(self::substr($a, 26, 3)) >> 2);2938        $a11 = (self::load_4(self::substr($a, 28, 4)) >> 7);2939 2940        //    int64_t b0  = 2097151 & load_3(b);2941        //    int64_t b1  = 2097151 & (load_4(b + 2) >> 5);2942        //    int64_t b2  = 2097151 & (load_3(b + 5) >> 2);2943        //    int64_t b3  = 2097151 & (load_4(b + 7) >> 7);2944        //    int64_t b4  = 2097151 & (load_4(b + 10) >> 4);2945        //    int64_t b5  = 2097151 & (load_3(b + 13) >> 1);2946        //    int64_t b6  = 2097151 & (load_4(b + 15) >> 6);2947        //    int64_t b7  = 2097151 & (load_3(b + 18) >> 3);2948        //    int64_t b8  = 2097151 & load_3(b + 21);2949        //    int64_t b9  = 2097151 & (load_4(b + 23) >> 5);2950        //    int64_t b10 = 2097151 & (load_3(b + 26) >> 2);2951        //    int64_t b11 = (load_4(b + 28) >> 7);2952        $b0  = 2097151 &  self::load_3(self::substr($b, 0, 3));2953        $b1  = 2097151 & (self::load_4(self::substr($b, 2, 4)) >> 5);2954        $b2  = 2097151 & (self::load_3(self::substr($b, 5, 3)) >> 2);2955        $b3  = 2097151 & (self::load_4(self::substr($b, 7, 4)) >> 7);2956        $b4  = 2097151 & (self::load_4(self::substr($b, 10, 4)) >> 4);2957        $b5  = 2097151 & (self::load_3(self::substr($b, 13, 3)) >> 1);2958        $b6  = 2097151 & (self::load_4(self::substr($b, 15, 4)) >> 6);2959        $b7  = 2097151 & (self::load_3(self::substr($b, 18, 3)) >> 3);2960        $b8  = 2097151 &  self::load_3(self::substr($b, 21, 3));2961        $b9  = 2097151 & (self::load_4(self::substr($b, 23, 4)) >> 5);2962        $b10 = 2097151 & (self::load_3(self::substr($b, 26, 3)) >> 2);2963        $b11 = (self::load_4(self::substr($b, 28, 4)) >> 7);2964 2965        //    s0 = a0 * b0;2966        //    s1 = a0 * b1 + a1 * b0;2967        //    s2 = a0 * b2 + a1 * b1 + a2 * b0;2968        //    s3 = a0 * b3 + a1 * b2 + a2 * b1 + a3 * b0;2969        //    s4 = a0 * b4 + a1 * b3 + a2 * b2 + a3 * b1 + a4 * b0;2970        //    s5 = a0 * b5 + a1 * b4 + a2 * b3 + a3 * b2 + a4 * b1 + a5 * b0;2971        //    s6 = a0 * b6 + a1 * b5 + a2 * b4 + a3 * b3 + a4 * b2 + a5 * b1 + a6 * b0;2972        //    s7 = a0 * b7 + a1 * b6 + a2 * b5 + a3 * b4 + a4 * b3 + a5 * b2 +2973        //        a6 * b1 + a7 * b0;2974        //    s8 = a0 * b8 + a1 * b7 + a2 * b6 + a3 * b5 + a4 * b4 + a5 * b3 +2975        //        a6 * b2 + a7 * b1 + a8 * b0;2976        //    s9 = a0 * b9 + a1 * b8 + a2 * b7 + a3 * b6 + a4 * b5 + a5 * b4 +2977        //        a6 * b3 + a7 * b2 + a8 * b1 + a9 * b0;2978        //    s10 = a0 * b10 + a1 * b9 + a2 * b8 + a3 * b7 + a4 * b6 + a5 * b5 +2979        //        a6 * b4 + a7 * b3 + a8 * b2 + a9 * b1 + a10 * b0;2980        //    s11 = a0 * b11 + a1 * b10 + a2 * b9 + a3 * b8 + a4 * b7 + a5 * b6 +2981        //        a6 * b5 + a7 * b4 + a8 * b3 + a9 * b2 + a10 * b1 + a11 * b0;2982        //    s12 = a1 * b11 + a2 * b10 + a3 * b9 + a4 * b8 + a5 * b7 + a6 * b6 +2983        //        a7 * b5 + a8 * b4 + a9 * b3 + a10 * b2 + a11 * b1;2984        //    s13 = a2 * b11 + a3 * b10 + a4 * b9 + a5 * b8 + a6 * b7 + a7 * b6 +2985        //        a8 * b5 + a9 * b4 + a10 * b3 + a11 * b2;2986        //    s14 = a3 * b11 + a4 * b10 + a5 * b9 + a6 * b8 + a7 * b7 + a8 * b6 +2987        //        a9 * b5 + a10 * b4 + a11 * b3;2988        //    s15 = a4 * b11 + a5 * b10 + a6 * b9 + a7 * b8 + a8 * b7 + a9 * b6 +2989        //        a10 * b5 + a11 * b4;2990        //    s16 =2991        //        a5 * b11 + a6 * b10 + a7 * b9 + a8 * b8 + a9 * b7 + a10 * b6 + a11 * b5;2992        //    s17 = a6 * b11 + a7 * b10 + a8 * b9 + a9 * b8 + a10 * b7 + a11 * b6;