diff --git a/src/libsodium/crypto_onetimeauth/poly1305/53/api.h b/src/libsodium/crypto_onetimeauth/poly1305/53/api.h
new file mode 100644
index 00000000..acc133ed
--- /dev/null
+++ b/src/libsodium/crypto_onetimeauth/poly1305/53/api.h
@@ -0,0 +1,2 @@
+#define CRYPTO_BYTES 16
+#define CRYPTO_KEYBYTES 32
diff --git a/src/libsodium/crypto_onetimeauth/poly1305/53/auth_poly1305.c b/src/libsodium/crypto_onetimeauth/poly1305/53/auth_poly1305.c
new file mode 100644
index 00000000..a4a9c3f6
--- /dev/null
+++ b/src/libsodium/crypto_onetimeauth/poly1305/53/auth_poly1305.c
@@ -0,0 +1,1616 @@
+/*
+20080910
+D. J. Bernstein
+Public domain.
+*/
+
+#include "crypto_onetimeauth.h"
+
+typedef unsigned char uchar;
+typedef int int32;
+typedef unsigned int uint32;
+typedef long long int64;
+typedef unsigned long long uint64;
+
+static const double poly1305_53_constants[] = {
+  0.00000000558793544769287109375 /* alpham80 = 3 2^(-29) */
+, 24.0 /* alpham48 = 3 2^3 */
+, 103079215104.0 /* alpham16 = 3 2^35 */
+, 6755399441055744.0 /* alpha0 = 3 2^51 */
+, 1770887431076116955136.0 /* alpha18 = 3 2^69 */
+, 29014219670751100192948224.0 /* alpha32 = 3 2^83 */
+, 7605903601369376408980219232256.0 /* alpha50 = 3 2^101 */
+, 124615124604835863084731911901282304.0 /* alpha64 = 3 2^115 */
+, 32667107224410092492483962313449748299776.0 /* alpha82 = 3 2^133 */
+, 535217884764734955396857238543560676143529984.0 /* alpha96 = 3 2^147 */
+, 35076039295941670036888435985190792471742381031424.0 /* alpha112 = 3 2^163 */
+, 9194973245195333150150082162901855101712434733101613056.0 /* alpha130 = 3 2^181 */
+, 0.0000000000000000000000000000000000000036734198463196484624023016788195177431833298649127735047148490821200539357960224151611328125 /* scale = 5 2^(-130) */
+, 6755408030990331.0 /* offset0 = alpha0 + 2^33 - 5 */
+, 29014256564239239022116864.0 /* offset1 = alpha32 + 2^65 - 2^33 */
+, 124615283061160854719918951570079744.0 /* offset2 = alpha64 + 2^97 - 2^65 */
+, 535219245894202480694386063513315216128475136.0 /* offset3 = alpha96 + 2^130 - 2^97 */
+} ;
+
+int crypto_onetimeauth(unsigned char *out,const unsigned char *m,unsigned long long l,const unsigned char *k)
+{
+  register const unsigned char *r = k;
+  register const unsigned char *s = k + 16;
+  double r0high_stack;
+  double r1high_stack;
+  double r1low_stack;
+  double sr1high_stack;
+  double r2low_stack;
+  double sr2high_stack;
+  double r0low_stack;
+  double sr1low_stack;
+  double r2high_stack;
+  double sr2low_stack;
+  double r3high_stack;
+  double sr3high_stack;
+  double r3low_stack;
+  double sr3low_stack;
+  int64 d0;
+  int64 d1;
+  int64 d2;
+  int64 d3;
+  register double scale;
+  register double alpha0;
+  register double alpha32;
+  register double alpha64;
+  register double alpha96;
+  register double alpha130;
+  register double h0;
+  register double h1;
+  register double h2;
+  register double h3;
+  register double h4;
+  register double h5;
+  register double h6;
+  register double h7;
+  register double y7;
+  register double y6;
+  register double y1;
+  register double y0;
+  register double y5;
+  register double y4;
+  register double x7;
+  register double x6;
+  register double x1;
+  register double x0;
+  register double y3;
+  register double y2;
+  register double r3low;
+  register double r0low;
+  register double r3high;
+  register double r0high;
+  register double sr1low;
+  register double x5;
+  register double r3lowx0;
+  register double sr1high;
+  register double x4;
+  register double r0lowx6;
+  register double r1low;
+  register double x3;
+  register double r3highx0;
+  register double r1high;
+  register double x2;
+  register double r0highx6;
+  register double sr2low;
+  register double r0lowx0;
+  register double sr2high;
+  register double sr1lowx6;
+  register double r2low;
+  register double r0highx0;
+  register double r2high;
+  register double sr1highx6;
+  register double sr3low;
+  register double r1lowx0;
+  register double sr3high;
+  register double sr2lowx6;
+  register double r1highx0;
+  register double sr2highx6;
+  register double r2lowx0;
+  register double sr3lowx6;
+  register double r2highx0;
+  register double sr3highx6;
+  register double r1highx4;
+  register double r1lowx4;
+  register double r0highx4;
+  register double r0lowx4;
+  register double sr3highx4;
+  register double sr3lowx4;
+  register double sr2highx4;
+  register double sr2lowx4;
+  register double r0lowx2;
+  register double r0highx2;
+  register double r1lowx2;
+  register double r1highx2;
+  register double r2lowx2;
+  register double r2highx2;
+  register double sr3lowx2;
+  register double sr3highx2;
+  register double z0;
+  register double z1;
+  register double z2;
+  register double z3;
+  register int64 r0;
+  register int64 r1;
+  register int64 r2;
+  register int64 r3;
+  register uint32 r00;
+  register uint32 r01;
+  register uint32 r02;
+  register uint32 r03;
+  register uint32 r10;
+  register uint32 r11;
+  register uint32 r12;
+  register uint32 r13;
+  register uint32 r20;
+  register uint32 r21;
+  register uint32 r22;
+  register uint32 r23;
+  register uint32 r30;
+  register uint32 r31;
+  register uint32 r32;
+  register uint32 r33;
+  register int64 m0;
+  register int64 m1;
+  register int64 m2;
+  register int64 m3;
+  register uint32 m00;
+  register uint32 m01;
+  register uint32 m02;
+  register uint32 m03;
+  register uint32 m10;
+  register uint32 m11;
+  register uint32 m12;
+  register uint32 m13;
+  register uint32 m20;
+  register uint32 m21;
+  register uint32 m22;
+  register uint32 m23;
+  register uint32 m30;
+  register uint32 m31;
+  register uint32 m32;
+  register uint64 m33;
+  register char *constants;
+  register int32 lbelow2;
+  register int32 lbelow3;
+  register int32 lbelow4;
+  register int32 lbelow5;
+  register int32 lbelow6;
+  register int32 lbelow7;
+  register int32 lbelow8;
+  register int32 lbelow9;
+  register int32 lbelow10;
+  register int32 lbelow11;
+  register int32 lbelow12;
+  register int32 lbelow13;
+  register int32 lbelow14;
+  register int32 lbelow15;
+  register double alpham80;
+  register double alpham48;
+  register double alpham16;
+  register double alpha18;
+  register double alpha50;
+  register double alpha82;
+  register double alpha112;
+  register double offset0;
+  register double offset1;
+  register double offset2;
+  register double offset3;
+  register uint32 s00;
+  register uint32 s01;
+  register uint32 s02;
+  register uint32 s03;
+  register uint32 s10;
+  register uint32 s11;
+  register uint32 s12;
+  register uint32 s13;
+  register uint32 s20;
+  register uint32 s21;
+  register uint32 s22;
+  register uint32 s23;
+  register uint32 s30;
+  register uint32 s31;
+  register uint32 s32;
+  register uint32 s33;
+  register uint64 bits32;
+  register uint64 f;
+  register uint64 f0;
+  register uint64 f1;
+  register uint64 f2;
+  register uint64 f3;
+  register uint64 f4;
+  register uint64 g;
+  register uint64 g0;
+  register uint64 g1;
+  register uint64 g2;
+  register uint64 g3;
+  register uint64 g4;
+
+  r00 = *(uchar *) (r + 0);
+  constants = (char *) &poly1305_53_constants;
+
+  r01 = *(uchar *) (r + 1);
+
+  r02 = *(uchar *) (r + 2);
+  r0 = 2151;
+
+  r03 = *(uchar *) (r + 3); r03 &= 15;
+  r0 <<= 51;
+
+  r10 = *(uchar *) (r + 4); r10 &= 252;
+  r01 <<= 8;
+  r0 += r00;
+
+  r11 = *(uchar *) (r + 5);
+  r02 <<= 16;
+  r0 += r01;
+
+  r12 = *(uchar *) (r + 6);
+  r03 <<= 24;
+  r0 += r02;
+
+  r13 = *(uchar *) (r + 7); r13 &= 15;
+  r1 = 2215;
+  r0 += r03;
+
+  d0 = r0;
+  r1 <<= 51;
+  r2 = 2279;
+
+  r20 = *(uchar *) (r + 8); r20 &= 252;
+  r11 <<= 8;
+  r1 += r10;
+
+  r21 = *(uchar *) (r + 9);
+  r12 <<= 16;
+  r1 += r11;
+
+  r22 = *(uchar *) (r + 10);
+  r13 <<= 24;
+  r1 += r12;
+
+  r23 = *(uchar *) (r + 11); r23 &= 15;
+  r2 <<= 51;
+  r1 += r13;
+
+  d1 = r1;
+  r21 <<= 8;
+  r2 += r20;
+
+  r30 = *(uchar *) (r + 12); r30 &= 252;
+  r22 <<= 16;
+  r2 += r21;
+
+  r31 = *(uchar *) (r + 13);
+  r23 <<= 24;
+  r2 += r22;
+
+  r32 = *(uchar *) (r + 14);
+  r2 += r23;
+  r3 = 2343;
+
+  d2 = r2;
+  r3 <<= 51;
+  alpha32 = *(double *) (constants + 40);
+
+  r33 = *(uchar *) (r + 15); r33 &= 15;
+  r31 <<= 8;
+  r3 += r30;
+
+  r32 <<= 16;
+  r3 += r31;
+
+  r33 <<= 24;
+  r3 += r32;
+
+  r3 += r33;
+  h0 = alpha32 - alpha32;
+
+  d3 = r3;
+  h1 = alpha32 - alpha32;
+
+  alpha0 = *(double *) (constants + 24);
+  h2 = alpha32 - alpha32;
+
+  alpha64 = *(double *) (constants + 56);
+  h3 = alpha32 - alpha32;
+
+  alpha18 = *(double *) (constants + 32);
+  h4 = alpha32 - alpha32;
+
+  r0low = *(double *) &d0;
+  h5 = alpha32 - alpha32;
+
+  r1low = *(double *) &d1;
+  h6 = alpha32 - alpha32;
+
+  r2low = *(double *) &d2;
+  h7 = alpha32 - alpha32;
+
+  alpha50 = *(double *) (constants + 48);
+  r0low -= alpha0;
+
+  alpha82 = *(double *) (constants + 64);
+  r1low -= alpha32;
+
+  scale = *(double *) (constants + 96);
+  r2low -= alpha64;
+
+  alpha96 = *(double *) (constants + 72);
+  r0high = r0low + alpha18;
+
+  r3low = *(double *) &d3;
+
+  alpham80 = *(double *) (constants + 0);
+  r1high = r1low + alpha50;
+  sr1low = scale * r1low;
+
+  alpham48 = *(double *) (constants + 8);
+  r2high = r2low + alpha82;
+  sr2low = scale * r2low;
+
+  r0high -= alpha18;
+  r0high_stack = r0high;
+
+  r3low -= alpha96;
+
+  r1high -= alpha50;
+  r1high_stack = r1high;
+
+  sr1high = sr1low + alpham80;
+
+  alpha112 = *(double *) (constants + 80);
+  r0low -= r0high;
+
+  alpham16 = *(double *) (constants + 16);
+  r2high -= alpha82;
+  sr3low = scale * r3low;
+
+  alpha130 = *(double *) (constants + 88);
+  sr2high = sr2low + alpham48;
+
+  r1low -= r1high;
+  r1low_stack = r1low;
+
+  sr1high -= alpham80;
+  sr1high_stack = sr1high;
+
+  r2low -= r2high;
+  r2low_stack = r2low;
+
+  sr2high -= alpham48;
+  sr2high_stack = sr2high;
+
+  r3high = r3low + alpha112;
+  r0low_stack = r0low;
+
+  sr1low -= sr1high;
+  sr1low_stack = sr1low;
+
+  sr3high = sr3low + alpham16;
+  r2high_stack = r2high;
+
+  sr2low -= sr2high;
+  sr2low_stack = sr2low;
+
+  r3high -= alpha112;
+  r3high_stack = r3high;
+
+
+  sr3high -= alpham16;
+  sr3high_stack = sr3high;
+
+
+  r3low -= r3high;
+  r3low_stack = r3low;
+
+
+  sr3low -= sr3high;
+  sr3low_stack = sr3low;
+
+if (l < 16) goto addatmost15bytes;
+
+  m00 = *(uchar *) (m + 0);
+  m0 = 2151;
+
+  m0 <<= 51;
+  m1 = 2215;
+  m01 = *(uchar *) (m + 1);
+
+  m1 <<= 51;
+  m2 = 2279;
+  m02 = *(uchar *) (m + 2);
+
+  m2 <<= 51;
+  m3 = 2343;
+  m03 = *(uchar *) (m + 3);
+
+  m10 = *(uchar *) (m + 4);
+  m01 <<= 8;
+  m0 += m00;
+
+  m11 = *(uchar *) (m + 5);
+  m02 <<= 16;
+  m0 += m01;
+
+  m12 = *(uchar *) (m + 6);
+  m03 <<= 24;
+  m0 += m02;
+
+  m13 = *(uchar *) (m + 7);
+  m3 <<= 51;
+  m0 += m03;
+
+  m20 = *(uchar *) (m + 8);
+  m11 <<= 8;
+  m1 += m10;
+
+  m21 = *(uchar *) (m + 9);
+  m12 <<= 16;
+  m1 += m11;
+
+  m22 = *(uchar *) (m + 10);
+  m13 <<= 24;
+  m1 += m12;
+
+  m23 = *(uchar *) (m + 11);
+  m1 += m13;
+
+  m30 = *(uchar *) (m + 12);
+  m21 <<= 8;
+  m2 += m20;
+
+  m31 = *(uchar *) (m + 13);
+  m22 <<= 16;
+  m2 += m21;
+
+  m32 = *(uchar *) (m + 14);
+  m23 <<= 24;
+  m2 += m22;
+
+  m33 = *(uchar *) (m + 15);
+  m2 += m23;
+
+  d0 = m0;
+  m31 <<= 8;
+  m3 += m30;
+
+  d1 = m1;
+  m32 <<= 16;
+  m3 += m31;
+
+  d2 = m2;
+  m33 += 256;
+
+  m33 <<= 24;
+  m3 += m32;
+
+  m3 += m33;
+  d3 = m3;
+
+  m += 16;
+  l -= 16;
+
+  z0 = *(double *) &d0;
+
+  z1 = *(double *) &d1;
+
+  z2 = *(double *) &d2;
+
+  z3 = *(double *) &d3;
+
+  z0 -= alpha0;
+
+  z1 -= alpha32;
+
+  z2 -= alpha64;
+
+  z3 -= alpha96;
+
+  h0 += z0;
+
+  h1 += z1;
+
+  h3 += z2;
+
+  h5 += z3;
+
+if (l < 16) goto multiplyaddatmost15bytes;
+
+multiplyaddatleast16bytes:;
+
+  m2 = 2279;
+  m20 = *(uchar *) (m + 8);
+  y7 = h7 + alpha130;
+
+  m2 <<= 51;
+  m3 = 2343;
+  m21 = *(uchar *) (m + 9);
+  y6 = h6 + alpha130;
+
+  m3 <<= 51;
+  m0 = 2151;
+  m22 = *(uchar *) (m + 10);
+  y1 = h1 + alpha32;
+
+  m0 <<= 51;
+  m1 = 2215;
+  m23 = *(uchar *) (m + 11);
+  y0 = h0 + alpha32;
+
+  m1 <<= 51;
+  m30 = *(uchar *) (m + 12);
+  y7 -= alpha130;
+
+  m21 <<= 8;
+  m2 += m20;
+  m31 = *(uchar *) (m + 13);
+  y6 -= alpha130;
+
+  m22 <<= 16;
+  m2 += m21;
+  m32 = *(uchar *) (m + 14);
+  y1 -= alpha32;
+
+  m23 <<= 24;
+  m2 += m22;
+  m33 = *(uchar *) (m + 15);
+  y0 -= alpha32;
+
+  m2 += m23;
+  m00 = *(uchar *) (m + 0);
+  y5 = h5 + alpha96;
+
+  m31 <<= 8;
+  m3 += m30;
+  m01 = *(uchar *) (m + 1);
+  y4 = h4 + alpha96;
+
+  m32 <<= 16;
+  m02 = *(uchar *) (m + 2);
+  x7 = h7 - y7;
+  y7 *= scale;
+
+  m33 += 256;
+  m03 = *(uchar *) (m + 3);
+  x6 = h6 - y6;
+  y6 *= scale;
+
+  m33 <<= 24;
+  m3 += m31;
+  m10 = *(uchar *) (m + 4);
+  x1 = h1 - y1;
+
+  m01 <<= 8;
+  m3 += m32;
+  m11 = *(uchar *) (m + 5);
+  x0 = h0 - y0;
+
+  m3 += m33;
+  m0 += m00;
+  m12 = *(uchar *) (m + 6);
+  y5 -= alpha96;
+
+  m02 <<= 16;
+  m0 += m01;
+  m13 = *(uchar *) (m + 7);
+  y4 -= alpha96;
+
+  m03 <<= 24;
+  m0 += m02;
+  d2 = m2;
+  x1 += y7;
+
+  m0 += m03;
+  d3 = m3;
+  x0 += y6;
+
+  m11 <<= 8;
+  m1 += m10;
+  d0 = m0;
+  x7 += y5;
+
+  m12 <<= 16;
+  m1 += m11;
+  x6 += y4;
+
+  m13 <<= 24;
+  m1 += m12;
+  y3 = h3 + alpha64;
+
+  m1 += m13;
+  d1 = m1;
+  y2 = h2 + alpha64;
+
+  x0 += x1;
+
+  x6 += x7;
+
+  y3 -= alpha64;
+  r3low = r3low_stack;
+
+  y2 -= alpha64;
+  r0low = r0low_stack;
+
+  x5 = h5 - y5;
+  r3lowx0 = r3low * x0;
+  r3high = r3high_stack;
+
+  x4 = h4 - y4;
+  r0lowx6 = r0low * x6;
+  r0high = r0high_stack;
+
+  x3 = h3 - y3;
+  r3highx0 = r3high * x0;
+  sr1low = sr1low_stack;
+
+  x2 = h2 - y2;
+  r0highx6 = r0high * x6;
+  sr1high = sr1high_stack;
+
+  x5 += y3;
+  r0lowx0 = r0low * x0;
+  r1low = r1low_stack;
+
+  h6 = r3lowx0 + r0lowx6;
+  sr1lowx6 = sr1low * x6;
+  r1high = r1high_stack;
+
+  x4 += y2;
+  r0highx0 = r0high * x0;
+  sr2low = sr2low_stack;
+
+  h7 = r3highx0 + r0highx6;
+  sr1highx6 = sr1high * x6;
+  sr2high = sr2high_stack;
+
+  x3 += y1;
+  r1lowx0 = r1low * x0;
+  r2low = r2low_stack;
+
+  h0 = r0lowx0 + sr1lowx6;
+  sr2lowx6 = sr2low * x6;
+  r2high = r2high_stack;
+
+  x2 += y0;
+  r1highx0 = r1high * x0;
+  sr3low = sr3low_stack;
+
+  h1 = r0highx0 + sr1highx6;
+  sr2highx6 = sr2high * x6;
+  sr3high = sr3high_stack;
+
+  x4 += x5;
+  r2lowx0 = r2low * x0;
+  z2 = *(double *) &d2;
+
+  h2 = r1lowx0 + sr2lowx6;
+  sr3lowx6 = sr3low * x6;
+
+  x2 += x3;
+  r2highx0 = r2high * x0;
+  z3 = *(double *) &d3;
+
+  h3 = r1highx0 + sr2highx6;
+  sr3highx6 = sr3high * x6;
+
+  r1highx4 = r1high * x4;
+  z2 -= alpha64;
+
+  h4 = r2lowx0 + sr3lowx6;
+  r1lowx4 = r1low * x4;
+
+  r0highx4 = r0high * x4;
+  z3 -= alpha96;
+
+  h5 = r2highx0 + sr3highx6;
+  r0lowx4 = r0low * x4;
+
+  h7 += r1highx4;
+  sr3highx4 = sr3high * x4;
+
+  h6 += r1lowx4;
+  sr3lowx4 = sr3low * x4;
+
+  h5 += r0highx4;
+  sr2highx4 = sr2high * x4;
+
+  h4 += r0lowx4;
+  sr2lowx4 = sr2low * x4;
+
+  h3 += sr3highx4;
+  r0lowx2 = r0low * x2;
+
+  h2 += sr3lowx4;
+  r0highx2 = r0high * x2;
+
+  h1 += sr2highx4;
+  r1lowx2 = r1low * x2;
+
+  h0 += sr2lowx4;
+  r1highx2 = r1high * x2;
+
+  h2 += r0lowx2;
+  r2lowx2 = r2low * x2;
+
+  h3 += r0highx2;
+  r2highx2 = r2high * x2;
+
+  h4 += r1lowx2;
+  sr3lowx2 = sr3low * x2;
+
+  h5 += r1highx2;
+  sr3highx2 = sr3high * x2;
+  alpha0 = *(double *) (constants + 24);
+
+  m += 16;
+  h6 += r2lowx2;
+
+  l -= 16;
+  h7 += r2highx2;
+
+  z1 = *(double *) &d1;
+  h0 += sr3lowx2;
+
+  z0 = *(double *) &d0;
+  h1 += sr3highx2;
+
+  z1 -= alpha32;
+
+  z0 -= alpha0;
+
+  h5 += z3;
+
+  h3 += z2;
+
+  h1 += z1;
+
+  h0 += z0;
+
+if (l >= 16) goto multiplyaddatleast16bytes;
+
+multiplyaddatmost15bytes:;
+
+  y7 = h7 + alpha130;
+
+  y6 = h6 + alpha130;
+
+  y1 = h1 + alpha32;
+
+  y0 = h0 + alpha32;
+
+  y7 -= alpha130;
+
+  y6 -= alpha130;
+
+  y1 -= alpha32;
+
+  y0 -= alpha32;
+
+  y5 = h5 + alpha96;
+
+  y4 = h4 + alpha96;
+
+  x7 = h7 - y7;
+  y7 *= scale;
+
+  x6 = h6 - y6;
+  y6 *= scale;
+
+  x1 = h1 - y1;
+
+  x0 = h0 - y0;
+
+  y5 -= alpha96;
+
+  y4 -= alpha96;
+
+  x1 += y7;
+
+  x0 += y6;
+
+  x7 += y5;
+
+  x6 += y4;
+
+  y3 = h3 + alpha64;
+
+  y2 = h2 + alpha64;
+
+  x0 += x1;
+
+  x6 += x7;
+
+  y3 -= alpha64;
+  r3low = r3low_stack;
+
+  y2 -= alpha64;
+  r0low = r0low_stack;
+
+  x5 = h5 - y5;
+  r3lowx0 = r3low * x0;
+  r3high = r3high_stack;
+
+  x4 = h4 - y4;
+  r0lowx6 = r0low * x6;
+  r0high = r0high_stack;
+
+  x3 = h3 - y3;
+  r3highx0 = r3high * x0;
+  sr1low = sr1low_stack;
+
+  x2 = h2 - y2;
+  r0highx6 = r0high * x6;
+  sr1high = sr1high_stack;
+
+  x5 += y3;
+  r0lowx0 = r0low * x0;
+  r1low = r1low_stack;
+
+  h6 = r3lowx0 + r0lowx6;
+  sr1lowx6 = sr1low * x6;
+  r1high = r1high_stack;
+
+  x4 += y2;
+  r0highx0 = r0high * x0;
+  sr2low = sr2low_stack;
+
+  h7 = r3highx0 + r0highx6;
+  sr1highx6 = sr1high * x6;
+  sr2high = sr2high_stack;
+
+  x3 += y1;
+  r1lowx0 = r1low * x0;
+  r2low = r2low_stack;
+
+  h0 = r0lowx0 + sr1lowx6;
+  sr2lowx6 = sr2low * x6;
+  r2high = r2high_stack;
+
+  x2 += y0;
+  r1highx0 = r1high * x0;
+  sr3low = sr3low_stack;
+
+  h1 = r0highx0 + sr1highx6;
+  sr2highx6 = sr2high * x6;
+  sr3high = sr3high_stack;
+
+  x4 += x5;
+  r2lowx0 = r2low * x0;
+
+  h2 = r1lowx0 + sr2lowx6;
+  sr3lowx6 = sr3low * x6;
+
+  x2 += x3;
+  r2highx0 = r2high * x0;
+
+  h3 = r1highx0 + sr2highx6;
+  sr3highx6 = sr3high * x6;
+
+  r1highx4 = r1high * x4;
+
+  h4 = r2lowx0 + sr3lowx6;
+  r1lowx4 = r1low * x4;
+
+  r0highx4 = r0high * x4;
+
+  h5 = r2highx0 + sr3highx6;
+  r0lowx4 = r0low * x4;
+
+  h7 += r1highx4;
+  sr3highx4 = sr3high * x4;
+
+  h6 += r1lowx4;
+  sr3lowx4 = sr3low * x4;
+
+  h5 += r0highx4;
+  sr2highx4 = sr2high * x4;
+
+  h4 += r0lowx4;
+  sr2lowx4 = sr2low * x4;
+
+  h3 += sr3highx4;
+  r0lowx2 = r0low * x2;
+
+  h2 += sr3lowx4;
+  r0highx2 = r0high * x2;
+
+  h1 += sr2highx4;
+  r1lowx2 = r1low * x2;
+
+  h0 += sr2lowx4;
+  r1highx2 = r1high * x2;
+
+  h2 += r0lowx2;
+  r2lowx2 = r2low * x2;
+
+  h3 += r0highx2;
+  r2highx2 = r2high * x2;
+
+  h4 += r1lowx2;
+  sr3lowx2 = sr3low * x2;
+
+  h5 += r1highx2;
+  sr3highx2 = sr3high * x2;
+
+  h6 += r2lowx2;
+
+  h7 += r2highx2;
+
+  h0 += sr3lowx2;
+
+  h1 += sr3highx2;
+
+addatmost15bytes:;
+
+if (l == 0) goto nomorebytes;
+
+  lbelow2 = l - 2;
+
+  lbelow3 = l - 3;
+
+  lbelow2 >>= 31;
+  lbelow4 = l - 4;
+
+  m00 = *(uchar *) (m + 0);
+  lbelow3 >>= 31;
+  m += lbelow2;
+
+  m01 = *(uchar *) (m + 1);
+  lbelow4 >>= 31;
+  m += lbelow3;
+
+  m02 = *(uchar *) (m + 2);
+  m += lbelow4;
+  m0 = 2151;
+
+  m03 = *(uchar *) (m + 3);
+  m0 <<= 51;
+  m1 = 2215;
+
+  m0 += m00;
+  m01 &= ~lbelow2;
+
+  m02 &= ~lbelow3;
+  m01 -= lbelow2;
+
+  m01 <<= 8;
+  m03 &= ~lbelow4;
+
+  m0 += m01;
+  lbelow2 -= lbelow3;
+
+  m02 += lbelow2;
+  lbelow3 -= lbelow4;
+
+  m02 <<= 16;
+  m03 += lbelow3;
+
+  m03 <<= 24;
+  m0 += m02;
+
+  m0 += m03;
+  lbelow5 = l - 5;
+
+  lbelow6 = l - 6;
+  lbelow7 = l - 7;
+
+  lbelow5 >>= 31;
+  lbelow8 = l - 8;
+
+  lbelow6 >>= 31;
+  m += lbelow5;
+
+  m10 = *(uchar *) (m + 4);
+  lbelow7 >>= 31;
+  m += lbelow6;
+
+  m11 = *(uchar *) (m + 5);
+  lbelow8 >>= 31;
+  m += lbelow7;
+
+  m12 = *(uchar *) (m + 6);
+  m1 <<= 51;
+  m += lbelow8;
+
+  m13 = *(uchar *) (m + 7);
+  m10 &= ~lbelow5;
+  lbelow4 -= lbelow5;
+
+  m10 += lbelow4;
+  lbelow5 -= lbelow6;
+
+  m11 &= ~lbelow6;
+  m11 += lbelow5;
+
+  m11 <<= 8;
+  m1 += m10;
+
+  m1 += m11;
+  m12 &= ~lbelow7;
+
+  lbelow6 -= lbelow7;
+  m13 &= ~lbelow8;
+
+  m12 += lbelow6;
+  lbelow7 -= lbelow8;
+
+  m12 <<= 16;
+  m13 += lbelow7;
+
+  m13 <<= 24;
+  m1 += m12;
+
+  m1 += m13;
+  m2 = 2279;
+
+  lbelow9 = l - 9;
+  m3 = 2343;
+
+  lbelow10 = l - 10;
+  lbelow11 = l - 11;
+
+  lbelow9 >>= 31;
+  lbelow12 = l - 12;
+
+  lbelow10 >>= 31;
+  m += lbelow9;
+
+  m20 = *(uchar *) (m + 8);
+  lbelow11 >>= 31;
+  m += lbelow10;
+
+  m21 = *(uchar *) (m + 9);
+  lbelow12 >>= 31;
+  m += lbelow11;
+
+  m22 = *(uchar *) (m + 10);
+  m2 <<= 51;
+  m += lbelow12;
+
+  m23 = *(uchar *) (m + 11);
+  m20 &= ~lbelow9;
+  lbelow8 -= lbelow9;
+
+  m20 += lbelow8;
+  lbelow9 -= lbelow10;
+
+  m21 &= ~lbelow10;
+  m21 += lbelow9;
+
+  m21 <<= 8;
+  m2 += m20;
+
+  m2 += m21;
+  m22 &= ~lbelow11;
+
+  lbelow10 -= lbelow11;
+  m23 &= ~lbelow12;
+
+  m22 += lbelow10;
+  lbelow11 -= lbelow12;
+
+  m22 <<= 16;
+  m23 += lbelow11;
+
+  m23 <<= 24;
+  m2 += m22;
+
+  m3 <<= 51;
+  lbelow13 = l - 13;
+
+  lbelow13 >>= 31;
+  lbelow14 = l - 14;
+
+  lbelow14 >>= 31;
+  m += lbelow13;
+  lbelow15 = l - 15;
+
+  m30 = *(uchar *) (m + 12);
+  lbelow15 >>= 31;
+  m += lbelow14;
+
+  m31 = *(uchar *) (m + 13);
+  m += lbelow15;
+  m2 += m23;
+
+  m32 = *(uchar *) (m + 14);
+  m30 &= ~lbelow13;
+  lbelow12 -= lbelow13;
+
+  m30 += lbelow12;
+  lbelow13 -= lbelow14;
+
+  m3 += m30;
+  m31 &= ~lbelow14;
+
+  m31 += lbelow13;
+  m32 &= ~lbelow15;
+
+  m31 <<= 8;
+  lbelow14 -= lbelow15;
+
+  m3 += m31;
+  m32 += lbelow14;
+  d0 = m0;
+
+  m32 <<= 16;
+  m33 = lbelow15 + 1;
+  d1 = m1;
+
+  m33 <<= 24;
+  m3 += m32;
+  d2 = m2;
+
+  m3 += m33;
+  d3 = m3;
+
+  alpha0 = *(double *) (constants + 24);
+
+  z3 = *(double *) &d3;
+
+  z2 = *(double *) &d2;
+
+  z1 = *(double *) &d1;
+
+  z0 = *(double *) &d0;
+
+  z3 -= alpha96;
+
+  z2 -= alpha64;
+
+  z1 -= alpha32;
+
+  z0 -= alpha0;
+
+  h5 += z3;
+
+  h3 += z2;
+
+  h1 += z1;
+
+  h0 += z0;
+
+  y7 = h7 + alpha130;
+
+  y6 = h6 + alpha130;
+
+  y1 = h1 + alpha32;
+
+  y0 = h0 + alpha32;
+
+  y7 -= alpha130;
+
+  y6 -= alpha130;
+
+  y1 -= alpha32;
+
+  y0 -= alpha32;
+
+  y5 = h5 + alpha96;
+
+  y4 = h4 + alpha96;
+
+  x7 = h7 - y7;
+  y7 *= scale;
+
+  x6 = h6 - y6;
+  y6 *= scale;
+
+  x1 = h1 - y1;
+
+  x0 = h0 - y0;
+
+  y5 -= alpha96;
+
+  y4 -= alpha96;
+
+  x1 += y7;
+
+  x0 += y6;
+
+  x7 += y5;
+
+  x6 += y4;
+
+  y3 = h3 + alpha64;
+
+  y2 = h2 + alpha64;
+
+  x0 += x1;
+
+  x6 += x7;
+
+  y3 -= alpha64;
+  r3low = r3low_stack;
+
+  y2 -= alpha64;
+  r0low = r0low_stack;
+
+  x5 = h5 - y5;
+  r3lowx0 = r3low * x0;
+  r3high = r3high_stack;
+
+  x4 = h4 - y4;
+  r0lowx6 = r0low * x6;
+  r0high = r0high_stack;
+
+  x3 = h3 - y3;
+  r3highx0 = r3high * x0;
+  sr1low = sr1low_stack;
+
+  x2 = h2 - y2;
+  r0highx6 = r0high * x6;
+  sr1high = sr1high_stack;
+
+  x5 += y3;
+  r0lowx0 = r0low * x0;
+  r1low = r1low_stack;
+
+  h6 = r3lowx0 + r0lowx6;
+  sr1lowx6 = sr1low * x6;
+  r1high = r1high_stack;
+
+  x4 += y2;
+  r0highx0 = r0high * x0;
+  sr2low = sr2low_stack;
+
+  h7 = r3highx0 + r0highx6;
+  sr1highx6 = sr1high * x6;
+  sr2high = sr2high_stack;
+
+  x3 += y1;
+  r1lowx0 = r1low * x0;
+  r2low = r2low_stack;
+
+  h0 = r0lowx0 + sr1lowx6;
+  sr2lowx6 = sr2low * x6;
+  r2high = r2high_stack;
+
+  x2 += y0;
+  r1highx0 = r1high * x0;
+  sr3low = sr3low_stack;
+
+  h1 = r0highx0 + sr1highx6;
+  sr2highx6 = sr2high * x6;
+  sr3high = sr3high_stack;
+
+  x4 += x5;
+  r2lowx0 = r2low * x0;
+
+  h2 = r1lowx0 + sr2lowx6;
+  sr3lowx6 = sr3low * x6;
+
+  x2 += x3;
+  r2highx0 = r2high * x0;
+
+  h3 = r1highx0 + sr2highx6;
+  sr3highx6 = sr3high * x6;
+
+  r1highx4 = r1high * x4;
+
+  h4 = r2lowx0 + sr3lowx6;
+  r1lowx4 = r1low * x4;
+
+  r0highx4 = r0high * x4;
+
+  h5 = r2highx0 + sr3highx6;
+  r0lowx4 = r0low * x4;
+
+  h7 += r1highx4;
+  sr3highx4 = sr3high * x4;
+
+  h6 += r1lowx4;
+  sr3lowx4 = sr3low * x4;
+
+  h5 += r0highx4;
+  sr2highx4 = sr2high * x4;
+
+  h4 += r0lowx4;
+  sr2lowx4 = sr2low * x4;
+
+  h3 += sr3highx4;
+  r0lowx2 = r0low * x2;
+
+  h2 += sr3lowx4;
+  r0highx2 = r0high * x2;
+
+  h1 += sr2highx4;
+  r1lowx2 = r1low * x2;
+
+  h0 += sr2lowx4;
+  r1highx2 = r1high * x2;
+
+  h2 += r0lowx2;
+  r2lowx2 = r2low * x2;
+
+  h3 += r0highx2;
+  r2highx2 = r2high * x2;
+
+  h4 += r1lowx2;
+  sr3lowx2 = sr3low * x2;
+
+  h5 += r1highx2;
+  sr3highx2 = sr3high * x2;
+
+  h6 += r2lowx2;
+
+  h7 += r2highx2;
+
+  h0 += sr3lowx2;
+
+  h1 += sr3highx2;
+
+
+nomorebytes:;
+
+  offset0 = *(double *) (constants + 104);
+  y7 = h7 + alpha130;
+
+  offset1 = *(double *) (constants + 112);
+  y0 = h0 + alpha32;
+
+  offset2 = *(double *) (constants + 120);
+  y1 = h1 + alpha32;
+
+  offset3 = *(double *) (constants + 128);
+  y2 = h2 + alpha64;
+
+  y7 -= alpha130;
+
+  y3 = h3 + alpha64;
+
+  y4 = h4 + alpha96;
+
+  y5 = h5 + alpha96;
+
+  x7 = h7 - y7;
+  y7 *= scale;
+
+  y0 -= alpha32;
+
+  y1 -= alpha32;
+
+  y2 -= alpha64;
+
+  h6 += x7;
+
+  y3 -= alpha64;
+
+  y4 -= alpha96;
+
+  y5 -= alpha96;
+
+  y6 = h6 + alpha130;
+
+  x0 = h0 - y0;
+
+  x1 = h1 - y1;
+
+  x2 = h2 - y2;
+
+  y6 -= alpha130;
+
+  x0 += y7;
+
+  x3 = h3 - y3;
+
+  x4 = h4 - y4;
+
+  x5 = h5 - y5;
+
+  x6 = h6 - y6;
+
+  y6 *= scale;
+
+  x2 += y0;
+
+  x3 += y1;
+
+  x4 += y2;
+
+  x0 += y6;
+
+  x5 += y3;
+
+  x6 += y4;
+
+  x2 += x3;
+
+  x0 += x1;
+
+  x4 += x5;
+
+  x6 += y5;
+
+  x2 += offset1;
+  *(double *) &d1 = x2;
+
+  x0 += offset0;
+  *(double *) &d0 = x0;
+
+  x4 += offset2;
+  *(double *) &d2 = x4;
+
+  x6 += offset3;
+  *(double *) &d3 = x6;
+
+
+
+
+  f0 = d0;
+
+  f1 = d1;
+  bits32 = -1;
+
+  f2 = d2;
+  bits32 >>= 32;
+
+  f3 = d3;
+  f = f0 >> 32;
+
+  f0 &= bits32;
+  f &= 255;
+
+  f1 += f;
+  g0 = f0 + 5;
+
+  g = g0 >> 32;
+  g0 &= bits32;
+
+  f = f1 >> 32;
+  f1 &= bits32;
+
+  f &= 255;
+  g1 = f1 + g;
+
+  g = g1 >> 32;
+  f2 += f;
+
+  f = f2 >> 32;
+  g1 &= bits32;
+
+  f2 &= bits32;
+  f &= 255;
+
+  f3 += f;
+  g2 = f2 + g;
+
+  g = g2 >> 32;
+  g2 &= bits32;
+
+  f4 = f3 >> 32;
+  f3 &= bits32;
+
+  f4 &= 255;
+  g3 = f3 + g;
+
+  g = g3 >> 32;
+  g3 &= bits32;
+
+  g4 = f4 + g;
+
+  g4 = g4 - 4;
+  s00 = *(uchar *) (s + 0);
+
+  f = (int64) g4 >> 63;
+  s01 = *(uchar *) (s + 1);
+
+  f0 &= f;
+  g0 &= ~f;
+  s02 = *(uchar *) (s + 2);
+
+  f1 &= f;
+  f0 |= g0;
+  s03 = *(uchar *) (s + 3);
+
+  g1 &= ~f;
+  f2 &= f;
+  s10 = *(uchar *) (s + 4);
+
+  f3 &= f;
+  g2 &= ~f;
+  s11 = *(uchar *) (s + 5);
+
+  g3 &= ~f;
+  f1 |= g1;
+  s12 = *(uchar *) (s + 6);
+
+  f2 |= g2;
+  f3 |= g3;
+  s13 = *(uchar *) (s + 7);
+
+  s01 <<= 8;
+  f0 += s00;
+  s20 = *(uchar *) (s + 8);
+
+  s02 <<= 16;
+  f0 += s01;
+  s21 = *(uchar *) (s + 9);
+
+  s03 <<= 24;
+  f0 += s02;
+  s22 = *(uchar *) (s + 10);
+
+  s11 <<= 8;
+  f1 += s10;
+  s23 = *(uchar *) (s + 11);
+
+  s12 <<= 16;
+  f1 += s11;
+  s30 = *(uchar *) (s + 12);
+
+  s13 <<= 24;
+  f1 += s12;
+  s31 = *(uchar *) (s + 13);
+
+  f0 += s03;
+  f1 += s13;
+  s32 = *(uchar *) (s + 14);
+
+  s21 <<= 8;
+  f2 += s20;
+  s33 = *(uchar *) (s + 15);
+
+  s22 <<= 16;
+  f2 += s21;
+
+  s23 <<= 24;
+  f2 += s22;
+
+  s31 <<= 8;
+  f3 += s30;
+
+  s32 <<= 16;
+  f3 += s31;
+
+  s33 <<= 24;
+  f3 += s32;
+
+  f2 += s23;
+  f3 += s33;
+
+  *(uchar *) (out + 0) = f0;
+  f0 >>= 8;
+  *(uchar *) (out + 1) = f0;
+  f0 >>= 8;
+  *(uchar *) (out + 2) = f0;
+  f0 >>= 8;
+  *(uchar *) (out + 3) = f0;
+  f0 >>= 8;
+  f1 += f0;
+
+  *(uchar *) (out + 4) = f1;
+  f1 >>= 8;
+  *(uchar *) (out + 5) = f1;
+  f1 >>= 8;
+  *(uchar *) (out + 6) = f1;
+  f1 >>= 8;
+  *(uchar *) (out + 7) = f1;
+  f1 >>= 8;
+  f2 += f1;
+
+  *(uchar *) (out + 8) = f2;
+  f2 >>= 8;
+  *(uchar *) (out + 9) = f2;
+  f2 >>= 8;
+  *(uchar *) (out + 10) = f2;
+  f2 >>= 8;
+  *(uchar *) (out + 11) = f2;
+  f2 >>= 8;
+  f3 += f2;
+
+  *(uchar *) (out + 12) = f3;
+  f3 >>= 8;
+  *(uchar *) (out + 13) = f3;
+  f3 >>= 8;
+  *(uchar *) (out + 14) = f3;
+  f3 >>= 8;
+  *(uchar *) (out + 15) = f3;
+
+  return 0;
+}
diff --git a/src/libsodium/crypto_onetimeauth/poly1305/53/crypto_onetimeauth.h b/src/libsodium/crypto_onetimeauth/poly1305/53/crypto_onetimeauth.h
new file mode 100644
index 00000000..450e122d
--- /dev/null
+++ b/src/libsodium/crypto_onetimeauth/poly1305/53/crypto_onetimeauth.h
@@ -0,0 +1,14 @@
+#ifndef crypto_onetimeauth_H
+#define crypto_onetimeauth_H
+
+#include "crypto_onetimeauth_poly1305.h"
+
+#define crypto_onetimeauth crypto_onetimeauth_poly1305
+#define crypto_onetimeauth_verify crypto_onetimeauth_poly1305_verify
+#define crypto_onetimeauth_BYTES crypto_onetimeauth_poly1305_BYTES
+#define crypto_onetimeauth_KEYBYTES crypto_onetimeauth_poly1305_KEYBYTES
+#define crypto_onetimeauth_PRIMITIVE "poly1305"
+#define crypto_onetimeauth_IMPLEMENTATION crypto_onetimeauth_poly1305_IMPLEMENTATION
+#define crypto_onetimeauth_VERSION crypto_onetimeauth_poly1305_VERSION
+
+#endif
diff --git a/src/libsodium/crypto_onetimeauth/poly1305/53/verify_poly1305.c b/src/libsodium/crypto_onetimeauth/poly1305/53/verify_poly1305.c
new file mode 100644
index 00000000..c7e063f1
--- /dev/null
+++ b/src/libsodium/crypto_onetimeauth/poly1305/53/verify_poly1305.c
@@ -0,0 +1,9 @@
+#include "crypto_verify_16.h"
+#include "crypto_onetimeauth.h"
+
+int crypto_onetimeauth_verify(const unsigned char *h,const unsigned char *in,unsigned long long inlen,const unsigned char *k)
+{
+  unsigned char correct[16];
+  crypto_onetimeauth(correct,in,inlen,k);
+  return crypto_verify_16(h,correct);
+}