1 files changed, 65 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/montmulf.h b/security/nss/lib/freebl/mpi/montmulf.h
new file mode 100644
index 000000000..69bed4acb
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+++ b/security/nss/lib/freebl/mpi/montmulf.h
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*  The functions that are to be called from outside of the .s file have the
+ *  following interfaces and array size requirements:
+ */
+
+void conv_i32_to_d32(double *d32, unsigned int *i32, int len);
+
+/*  Converts an array of int's to an array of doubles, so that each double
+ *  corresponds to an int.  len is the number of items converted.
+ *  Does not allocate the output array.
+ *  The pointers d32 and i32 should point to arrays of size at least  len
+ *  (doubles and unsigned ints, respectively)
+ */
+
+void conv_i32_to_d16(double *d16, unsigned int *i32, int len);
+
+/*  Converts an array of int's to an array of doubles so that each element
+ *  of the int array is converted to a pair of doubles, the first one
+ *  corresponding to the lower (least significant) 16 bits of the int and
+ *  the second one corresponding to the upper (most significant) 16 bits of
+ *  the 32-bit int. len is the number of ints converted.
+ *  Does not allocate the output array.
+ *  The pointer d16 should point to an array of doubles of size at least
+ *  2*len and i32 should point an array of ints of size at least  len
+ */
+
+void conv_i32_to_d32_and_d16(double *d32, double *d16,
+                             unsigned int *i32, int len);
+
+/*  Does the above two conversions together, it is much faster than doing
+ *  both of those in succession
+ */
+
+void mont_mulf_noconv(unsigned int *result,
+                      double *dm1, double *dm2, double *dt,
+                      double *dn, unsigned int *nint,
+                      int nlen, double dn0);
+
+/*  Does the Montgomery multiplication of the numbers stored in the arrays
+ *  pointed to by dm1 and dm2, writing the result to the array pointed to by
+ *  result. It uses the array pointed to by dt as a temporary work area.
+ *  nint should point to the modulus in the array-of-integers representation,
+ *  dn should point to its array-of-doubles as obtained as a result of the
+ *  function call   conv_i32_to_d32(dn, nint, nlen);
+ *  nlen is the length of the array containing the modulus.
+ *  The representation used for dm1 is the one that is a result of the function
+ *  call   conv_i32_to_d32(dm1, m1, nlen), the representation for dm2 is the
+ *  result of the function call   conv_i32_to_d16(dm2, m2, nlen).
+ *  Note that m1 and m2 should both be of length nlen, so they should be
+ *  padded with 0's if necessary before the conversion. The result comes in
+ *  this form (int representation, padded with 0's).
+ *  dn0 is the value of the 16 least significant bits of n0'.
+ *  The function does not allocate memory for any of the arrays, so the
+ *  pointers should point to arrays with the following minimal sizes:
+ *  result - nlen+1
+ *  dm1    - nlen
+ *  dm2    - 2*nlen+1  ( the +1 is necessary for technical reasons )
+ *  dt     - 4*nlen+2
+ *  dn     - nlen
+ *  nint   - nlen
+ *  No two arrays should point to overlapping areas of memory.
+ */