Aws lc s2n bignum update 2024 03 06 (#1478)

This pulls the latest changes in s2n-bignum which are:
- Performance improvement in curve25519_x25519{_bytes}.s
- Copyright updates (adds MIT-0)

Details of the performance improvement in x25519 is as follows, which is
also described in the message of corresponding commit:
```
This completely changes the implementation of ARM curve25519_x25519 and curve25519_x25519_byte (not the _alt forms, which remain faster on their target microarchitectures) to a base-25.5 unsaturated version with interleaved integer and SIMD operations, the inner loop closely following Emil Lenngren's implementation described in the paper

  https://github.com/Emill/X25519-AArch64/blob/master/X25519_AArch64.pdf

and available here:

  https://github.com/Emill/X25519-AArch64

A version of this code was generated by SLOTHY from the reorganized implementation by Abdulrahman, Becker, Kannwischer and Klein here:

 https://github.com/slothy-optimizer/slothy/blob/main/paper/clean/neon/X25519-AArch64-simple.s

as described in the associated paper

  https://eprint.iacr.org/2022/1303.pdf

with some additional annotations for use in the formal proof. The final modular inverse computation reverts to the usual saturated representation and s2n-bignum's divstep-based inverse function.
```

`./tool/bssl speed -filter 25519` shows 74% speedup on Graviton 2
(c6g.16xlarge):
```
Did 13000 Curve25519 arbitrary point multiplication operations in 1010330us (12867.1 ops/sec)
->
Did 23000 Curve25519 arbitrary point multiplication operations in 1028533us (22361.9 ops/sec)
```

Also, this commit updates `delegate.go` to deal with the condition (eq, ne, ...) of `fcsel` .

third_party/s2n-bignum/arm/curve25519/bignum_mod_n25519.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Reduce modulo basepoint order, z := x mod n_25519

third_party/s2n-bignum/arm/curve25519/bignum_neg_p25519.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Negate modulo p_25519, z := (-x) mod p_25519, assuming x reduced

third_party/s2n-bignum/arm/curve25519/curve25519_x25519_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // The x25519 function for curve25519

third_party/s2n-bignum/arm/curve25519/curve25519_x25519_byte_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // The x25519 function for curve25519 (byte array arguments)

third_party/s2n-bignum/arm/curve25519/curve25519_x25519base.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // The x25519 function for curve25519 on base element 9

third_party/s2n-bignum/arm/curve25519/curve25519_x25519base_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // The x25519 function for curve25519 on base element 9

third_party/s2n-bignum/arm/curve25519/curve25519_x25519base_byte.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // The x25519 function for curve25519 on base element 9 (byte array arguments)

third_party/s2n-bignum/arm/curve25519/curve25519_x25519base_byte_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // The x25519 function for curve25519 on base element 9 (byte array arguments)

third_party/s2n-bignum/arm/curve25519/edwards25519_decode.S

@@ -1,11 +1,11 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Decode compressed 256-bit form of edwards25519 point
 // Input c[32] (bytes); output function return and z[8]
 //
-// extern uint64_t edwards25519_decode(uint64_t z[static 8],uint8_t c[static 32]);
+// extern uint64_t edwards25519_decode(uint64_t z[static 8], const uint8_t c[static 32]);
 //
 // This interprets the input byte string as a little-endian number
 // representing a point (x,y) on the edwards25519 curve, encoded as

third_party/s2n-bignum/arm/curve25519/edwards25519_decode_alt.S

@@ -1,11 +1,11 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Decode compressed 256-bit form of edwards25519 point
 // Input c[32] (bytes); output function return and z[8]
 //
-// extern uint64_t edwards25519_decode_alt(uint64_t z[static 8],uint8_t c[static 32]);
+// extern uint64_t edwards25519_decode_alt(uint64_t z[static 8], const uint8_t c[static 32]);
 //
 // This interprets the input byte string as a little-endian number
 // representing a point (x,y) on the edwards25519 curve, encoded as

third_party/s2n-bignum/arm/curve25519/edwards25519_encode.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Encode edwards25519 point into compressed form as 256-bit number

third_party/s2n-bignum/arm/curve25519/edwards25519_scalarmulbase.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Scalar multiplication for the edwards25519 standard basepoint

third_party/s2n-bignum/arm/curve25519/edwards25519_scalarmulbase_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Scalar multiplication for the edwards25519 standard basepoint

third_party/s2n-bignum/arm/curve25519/edwards25519_scalarmuldouble.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Double scalar multiplication for edwards25519, fresh and base point

third_party/s2n-bignum/arm/curve25519/edwards25519_scalarmuldouble_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Double scalar multiplication for edwards25519, fresh and base point

third_party/s2n-bignum/arm/fastmul/bignum_emontredc_8n.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Extended Montgomery reduce in 8-digit blocks, results in input-output buffer

third_party/s2n-bignum/arm/fastmul/bignum_kmul_16_32.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Multiply z := x * y

third_party/s2n-bignum/arm/fastmul/bignum_kmul_32_64.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Multiply z := x * y

third_party/s2n-bignum/arm/fastmul/bignum_ksqr_16_32.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Square, z := x^2

third_party/s2n-bignum/arm/fastmul/bignum_ksqr_32_64.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Square, z := x^2

third_party/s2n-bignum/arm/generic/bignum_ge.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Compare bignums, x >= y

third_party/s2n-bignum/arm/generic/bignum_mul.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Multiply z := x * y

third_party/s2n-bignum/arm/generic/bignum_optsub.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Optionally subtract, z := x - y (if p nonzero) or z := x (if p zero)

third_party/s2n-bignum/arm/generic/bignum_sqr.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Square z := x^2

third_party/s2n-bignum/arm/p384/Makefile

@@ -1,6 +1,6 @@
 #############################################################################
 # Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-# SPDX-License-Identifier: Apache-2.0 OR ISC
+# SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 #############################################################################
 
 # If actually on an ARM8 machine, just use the GNU assembler (as). Otherwise

third_party/s2n-bignum/arm/p384/bignum_add_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Add modulo p_384, z := (x + y) mod p_384, assuming x and y reduced

third_party/s2n-bignum/arm/p384/bignum_bigendian_6.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Convert 6-digit (384-bit) bignum to/from big-endian form

third_party/s2n-bignum/arm/p384/bignum_cmul_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Multiply by a single word modulo p_384, z := (c * x) mod p_384, assuming

third_party/s2n-bignum/arm/p384/bignum_deamont_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Convert from almost-Montgomery form, z := (x / 2^384) mod p_384

third_party/s2n-bignum/arm/p384/bignum_demont_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Convert from Montgomery form z := (x / 2^384) mod p_384, assuming x reduced

third_party/s2n-bignum/arm/p384/bignum_double_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Double modulo p_384, z := (2 * x) mod p_384, assuming x reduced

third_party/s2n-bignum/arm/p384/bignum_half_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Halve modulo p_384, z := (x / 2) mod p_384, assuming x reduced

third_party/s2n-bignum/arm/p384/bignum_littleendian_6.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Convert 6-digit (384-bit) bignum to/from little-endian form

third_party/s2n-bignum/arm/p384/bignum_mod_n384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Reduce modulo group order, z := x mod n_384

third_party/s2n-bignum/arm/p384/bignum_mod_n384_6.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Reduce modulo group order, z := x mod n_384

third_party/s2n-bignum/arm/p384/bignum_mod_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Reduce modulo field characteristic, z := x mod p_384

third_party/s2n-bignum/arm/p384/bignum_mod_p384_6.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Reduce modulo field characteristic, z := x mod p_384

third_party/s2n-bignum/arm/p384/bignum_montmul_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Montgomery multiply, z := (x * y / 2^384) mod p_384

third_party/s2n-bignum/arm/p384/bignum_montmul_p384_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Montgomery multiply, z := (x * y / 2^384) mod p_384

third_party/s2n-bignum/arm/p384/bignum_montsqr_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Montgomery square, z := (x^2 / 2^384) mod p_384

third_party/s2n-bignum/arm/p384/bignum_montsqr_p384_alt.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Montgomery square, z := (x^2 / 2^384) mod p_384

third_party/s2n-bignum/arm/p384/bignum_mux_6.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // 384-bit multiplex/select z := x (if p nonzero) or z := y (if p zero)

third_party/s2n-bignum/arm/p384/bignum_neg_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Negate modulo p_384, z := (-x) mod p_384, assuming x reduced

third_party/s2n-bignum/arm/p384/bignum_nonzero_6.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // 384-bit nonzeroness test, returning 1 if x is nonzero, 0 if x is zero

third_party/s2n-bignum/arm/p384/bignum_optneg_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Optionally negate modulo p_384, z := (-x) mod p_384 (if p nonzero) or

third_party/s2n-bignum/arm/p384/bignum_sub_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Subtract modulo p_384, z := (x - y) mod p_384

third_party/s2n-bignum/arm/p384/bignum_tomont_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Convert to Montgomery form z := (2^384 * x) mod p_384

third_party/s2n-bignum/arm/p384/bignum_triple_p384.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Triple modulo p_384, z := (3 * x) mod p_384

third_party/s2n-bignum/arm/p384/p384_montjadd.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Point addition on NIST curve P-384 in Montgomery-Jacobian coordinates

third_party/s2n-bignum/arm/p384/p384_montjdouble.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Point doubling on NIST curve P-384 in Montgomery-Jacobian coordinates

third_party/s2n-bignum/arm/p384/p384_montjmixadd.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Point mixed addition on NIST curve P-384 in Montgomery-Jacobian coordinates

third_party/s2n-bignum/arm/p521/Makefile

@@ -1,6 +1,6 @@
 #############################################################################
 # Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-# SPDX-License-Identifier: Apache-2.0 OR ISC
+# SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 #############################################################################
 
 # If actually on an ARM8 machine, just use the GNU assembler (as). Otherwise

third_party/s2n-bignum/arm/p521/bignum_add_p521.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Add modulo p_521, z := (x + y) mod p_521, assuming x and y reduced

third_party/s2n-bignum/arm/p521/bignum_cmul_p521.S

@@ -1,5 +1,5 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0 OR ISC
+// SPDX-License-Identifier: Apache-2.0 OR ISC OR MIT-0
 
 // ----------------------------------------------------------------------------
 // Multiply by a single word modulo p_521, z := (c * x) mod p_521, assuming