x25519_quad257 Union Reference

An X25519 unsigned 257-bit integer. More...

#include <x25519.h>

Data Fields
x25519_t	value
	Big integer value. More...
const union x25519_oct258	oct258
	X25519 unsigned 258-bit integer. More...

Detailed Description

An X25519 unsigned 257-bit integer.

This is an unsigned integer N in the finite field of integers modulo the prime p=2^255-19.

In this representation, N is encoded as any big integer that is in the same congruence class as N (i.e that has the same value as N modulo p) and that lies within the 257-bit range [0,4p-1].

This type can be used as an input for addition, subtraction, or multiplication.

Multiplication will produce an output of this type.

Definition at line 64 of file x25519.h.

Field Documentation

value

x25519_t x25519_quad257::value

Big integer value.

Definition at line 66 of file x25519.h.

Referenced by x25519_add(), x25519_invert_okx(), x25519_key(), x25519_multiply_okx(), and x25519_step().

oct258

const union x25519_oct258 x25519_quad257::oct258

X25519 unsigned 258-bit integer.

Any value in the range [0,4p-1] is automatically also within the range [0,8p-1] and so may be consumed as an unsigned 258-bit integer.

Definition at line 73 of file x25519.h.

Referenced by x25519_add(), x25519_invert_okx(), x25519_step(), and x25519_subtract().

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The documentation for this union was generated from the following file:

• include/ipxe/x25519.h