[][src]Struct openssl::bn::BigNumRef

pub struct BigNumRef(_);

Reference to a BigNum

Methods

impl BigNumRef[src]

pub fn clear(&mut self)[src]

Erases the memory used by this BigNum, resetting its value to 0.

This can be used to destroy sensitive data such as keys when they are no longer needed.

OpenSSL documentation at BN_clear

pub fn add_word(&mut self, w: u32) -> Result<(), ErrorStack>[src]

Adds a u32 to self.

OpenSSL documentation at BN_add_word

pub fn sub_word(&mut self, w: u32) -> Result<(), ErrorStack>[src]

Subtracts a u32 from self.

OpenSSL documentation at BN_sub_word

pub fn mul_word(&mut self, w: u32) -> Result<(), ErrorStack>[src]

Multiplies a u32 by self.

OpenSSL documentation at BN_mul_word

pub fn div_word(&mut self, w: u32) -> Result<u64, ErrorStack>[src]

Divides self by a u32, returning the remainder.

OpenSSL documentation at BN_div_word

pub fn mod_word(&self, w: u32) -> Result<u64, ErrorStack>[src]

Returns the result of self modulo w.

OpenSSL documentation at BN_mod_word

pub fn rand_range(&self, rnd: &mut BigNumRef) -> Result<(), ErrorStack>[src]

Places a cryptographically-secure pseudo-random nonnegative number less than self in rnd.

OpenSSL documentation at BN_rand_range

pub fn pseudo_rand_range(&self, rnd: &mut BigNumRef) -> Result<(), ErrorStack>[src]

The cryptographically weak counterpart to rand_in_range.

OpenSSL documentation at BN_pseudo_rand_range

pub fn set_bit(&mut self, n: i32) -> Result<(), ErrorStack>[src]

Sets bit n. Equivalent to self |= (1 << n).

When setting a bit outside of self, it is expanded.

OpenSSL documentation at BN_set_bit

pub fn clear_bit(&mut self, n: i32) -> Result<(), ErrorStack>[src]

Clears bit n, setting it to 0. Equivalent to self &= ~(1 << n).

When clearing a bit outside of self, an error is returned.

OpenSSL documentation at BN_clear_bit

pub fn is_bit_set(&self, n: i32) -> bool[src]

Returns true if the nth bit of self is set to 1, false otherwise.

OpenSSL documentation at BN_is_bit_set

pub fn mask_bits(&mut self, n: i32) -> Result<(), ErrorStack>[src]

Truncates self to the lowest n bits.

An error occurs if self is already shorter than n bits.

OpenSSL documentation at BN_mask_bits

pub fn lshift1(&mut self, a: &BigNumRef) -> Result<(), ErrorStack>[src]

Places a << 1 in self. Equivalent to self * 2.

OpenSSL documentation at BN_lshift1

pub fn rshift1(&mut self, a: &BigNumRef) -> Result<(), ErrorStack>[src]

Places a >> 1 in self. Equivalent to self / 2.

OpenSSL documentation at BN_rshift1

pub fn checked_add(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef
) -> Result<(), ErrorStack>
[src]

Places a + b in self. core::ops::Add is also implemented for BigNumRef.

OpenSSL documentation at BN_add

pub fn checked_sub(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef
) -> Result<(), ErrorStack>
[src]

Places a - b in self. core::ops::Sub is also implemented for BigNumRef.

OpenSSL documentation at BN_sub

pub fn lshift(&mut self, a: &BigNumRef, n: i32) -> Result<(), ErrorStack>[src]

Places a << n in self. Equivalent to a * 2 ^ n.

OpenSSL documentation at BN_lshift

pub fn rshift(&mut self, a: &BigNumRef, n: i32) -> Result<(), ErrorStack>[src]

Places a >> n in self. Equivalent to a / 2 ^ n.

OpenSSL documentation at BN_rshift

pub fn to_owned(&self) -> Result<BigNum, ErrorStack>[src]

Creates a new BigNum with the same value.

OpenSSL documentation at BN_dup

pub fn set_negative(&mut self, negative: bool)[src]

Sets the sign of self. Pass true to set self to a negative. False sets self positive.

pub fn ucmp(&self, oth: &BigNumRef) -> Ordering[src]

Compare the absolute values of self and oth.

OpenSSL documentation at BN_ucmp

Examples

let s = -BigNum::from_u32(8).unwrap();
let o = BigNum::from_u32(8).unwrap();

assert_eq!(s.ucmp(&o), Ordering::Equal);

pub fn is_negative(&self) -> bool[src]

Returns true if self is negative.

pub fn num_bits(&self) -> i32[src]

Returns the number of significant bits in self.

OpenSSL documentation at BN_num_bits

pub fn num_bytes(&self) -> i32[src]

Returns the size of self in bytes. Implemented natively.

pub fn rand(
    &mut self,
    bits: i32,
    msb: MsbOption,
    odd: bool
) -> Result<(), ErrorStack>
[src]

Generates a cryptographically strong pseudo-random BigNum, placing it in self.

Parameters

  • bits: Length of the number in bits.
  • msb: The desired properties of the most significant bit. See constants.
  • odd: If true, the generated number will be odd.

Examples

use openssl::bn::{BigNum, MsbOption};
use openssl::error::ErrorStack;

fn generate_random() -> Result< BigNum, ErrorStack > {
   let mut big = BigNum::new()?;

   // Generates a 128-bit odd random number
   big.rand(128, MsbOption::MAYBE_ZERO, true);
   Ok((big))
}

OpenSSL documentation at BN_rand

pub fn pseudo_rand(
    &mut self,
    bits: i32,
    msb: MsbOption,
    odd: bool
) -> Result<(), ErrorStack>
[src]

The cryptographically weak counterpart to rand. Not suitable for key generation.

OpenSSL documentation at BN_psuedo_rand

pub fn generate_prime(
    &mut self,
    bits: i32,
    safe: bool,
    add: Option<&BigNumRef>,
    rem: Option<&BigNumRef>
) -> Result<(), ErrorStack>
[src]

Generates a prime number, placing it in self.

Parameters

  • bits: The length of the prime in bits (lower bound).
  • safe: If true, returns a "safe" prime p so that (p-1)/2 is also prime.
  • add/rem: If add is set to Some(add), p % add == rem will hold, where p is the generated prime and rem is 1 if not specified (None).

Examples

use openssl::bn::BigNum;
use openssl::error::ErrorStack;

fn generate_weak_prime() -> Result< BigNum, ErrorStack > {
   let mut big = BigNum::new()?;

   // Generates a 128-bit simple prime number
   big.generate_prime(128, false, None, None);
   Ok((big))
}

OpenSSL documentation at BN_generate_prime_ex

pub fn checked_mul(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a * b in self. core::ops::Mul is also implemented for BigNumRef.

OpenSSL documentation at BN_mul

pub fn checked_div(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a / b in self. The remainder is discarded. core::ops::Div is also implemented for BigNumRef.

OpenSSL documentation at BN_div

pub fn checked_rem(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a % b in self.

OpenSSL documentation at BN_div

pub fn div_rem(
    &mut self,
    rem: &mut BigNumRef,
    a: &BigNumRef,
    b: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a / b in self and a % b in rem.

OpenSSL documentation at BN_div

pub fn sqr(
    &mut self,
    a: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of in self.

OpenSSL documentation at BN_sqr

pub fn nnmod(
    &mut self,
    a: &BigNumRef,
    m: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a mod m in self. As opposed to div_rem the result is non-negative.

OpenSSL documentation at BN_nnmod

pub fn mod_add(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    m: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of (a + b) mod m in self.

OpenSSL documentation at BN_mod_add

pub fn mod_sub(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    m: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of (a - b) mod m in self.

OpenSSL documentation at BN_mod_sub

pub fn mod_mul(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    m: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of (a * b) mod m in self.

OpenSSL documentation at BN_mod_mul

pub fn mod_sqr(
    &mut self,
    a: &BigNumRef,
    m: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a² mod m in self.

OpenSSL documentation at BN_mod_sqr

pub fn exp(
    &mut self,
    a: &BigNumRef,
    p: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a^p in self.

OpenSSL documentation at BN_exp

pub fn mod_exp(
    &mut self,
    a: &BigNumRef,
    p: &BigNumRef,
    m: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the result of a^p mod m in self.

OpenSSL documentation at BN_mod_exp

pub fn mod_inverse(
    &mut self,
    a: &BigNumRef,
    n: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the inverse of a modulo n in self.

pub fn gcd(
    &mut self,
    a: &BigNumRef,
    b: &BigNumRef,
    ctx: &mut BigNumContextRef
) -> Result<(), ErrorStack>
[src]

Places the greatest common denominator of a and b in self.

OpenSSL documentation at BN_gcd

pub fn is_prime(
    &self,
    checks: i32,
    ctx: &mut BigNumContextRef
) -> Result<bool, ErrorStack>
[src]

Checks whether self is prime.

Performs a Miller-Rabin probabilistic primality test with checks iterations.

OpenSSL documentation at BN_is_prime_ex

Return Value

Returns true if self is prime with an error probability of less than 0.25 ^ checks.

pub fn is_prime_fasttest(
    &self,
    checks: i32,
    ctx: &mut BigNumContextRef,
    do_trial_division: bool
) -> Result<bool, ErrorStack>
[src]

Checks whether self is prime with optional trial division.

If do_trial_division is true, first performs trial division by a number of small primes. Then, like is_prime, performs a Miller-Rabin probabilistic primality test with checks iterations.

OpenSSL documentation at BN_is_prime_fasttest_ex

Return Value

Returns true if self is prime with an error probability of less than 0.25 ^ checks.

pub fn to_vec(&self) -> Vec<u8>[src]

Returns a big-endian byte vector representation of the absolute value of self.

self can be recreated by using from_slice.

let s = -BigNum::from_u32(4543).unwrap();
let r = BigNum::from_u32(4543).unwrap();

let s_vec = s.to_vec();
assert_eq!(BigNum::from_slice(&s_vec).unwrap(), r);

pub fn to_dec_str(&self) -> Result<OpensslString, ErrorStack>[src]

Returns a decimal string representation of self.

let s = -BigNum::from_u32(12345).unwrap();

assert_eq!(&**s.to_dec_str().unwrap(), "-12345");

pub fn to_hex_str(&self) -> Result<OpensslString, ErrorStack>[src]

Returns a hexadecimal string representation of self.

let s = -BigNum::from_u32(0x99ff).unwrap();

assert_eq!(&**s.to_hex_str().unwrap(), "-99FF");

pub fn to_asn1_integer(&self) -> Result<Asn1Integer, ErrorStack>[src]

Returns an Asn1Integer containing the value of self.

Trait Implementations

impl<'a, 'b> Add<&'b BigNum> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the + operator.

impl<'a, 'b> Add<&'b BigNumRef> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the + operator.

impl<'a, 'b> Add<&'b BigNumRef> for &'a BigNum[src]

type Output = BigNum

The resulting type after applying the + operator.

impl AsRef<BigNumRef> for BigNum[src]

impl Borrow<BigNumRef> for BigNum[src]

impl Debug for BigNumRef[src]

impl Display for BigNumRef[src]

impl<'a, 'b> Div<&'b BigNum> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the / operator.

impl<'a, 'b> Div<&'b BigNumRef> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the / operator.

impl<'a, 'b> Div<&'b BigNumRef> for &'a BigNum[src]

type Output = BigNum

The resulting type after applying the / operator.

impl Eq for BigNumRef[src]

impl ForeignTypeRef for BigNumRef[src]

type CType = BIGNUM

The raw C type.

impl<'a, 'b> Mul<&'b BigNum> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the * operator.

impl<'a, 'b> Mul<&'b BigNumRef> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the * operator.

impl<'a, 'b> Mul<&'b BigNumRef> for &'a BigNum[src]

type Output = BigNum

The resulting type after applying the * operator.

impl<'a> Neg for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the - operator.

impl Ord for BigNumRef[src]

impl PartialEq<BigNum> for BigNumRef[src]

impl PartialEq<BigNumRef> for BigNumRef[src]

impl PartialEq<BigNumRef> for BigNum[src]

impl PartialOrd<BigNum> for BigNumRef[src]

impl PartialOrd<BigNumRef> for BigNumRef[src]

impl PartialOrd<BigNumRef> for BigNum[src]

impl<'a, 'b> Rem<&'b BigNum> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the % operator.

impl<'a, 'b> Rem<&'b BigNumRef> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the % operator.

impl<'a, 'b> Rem<&'b BigNumRef> for &'a BigNum[src]

type Output = BigNum

The resulting type after applying the % operator.

impl Send for BigNumRef[src]

impl<'a> Shl<i32> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the << operator.

impl<'a> Shr<i32> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the >> operator.

impl<'a, 'b> Sub<&'b BigNum> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the - operator.

impl<'a, 'b> Sub<&'b BigNumRef> for &'a BigNumRef[src]

type Output = BigNum

The resulting type after applying the - operator.

impl<'a, 'b> Sub<&'b BigNumRef> for &'a BigNum[src]

type Output = BigNum

The resulting type after applying the - operator.

impl Sync for BigNumRef[src]

Auto Trait Implementations

impl !RefUnwindSafe for BigNumRef

impl Unpin for BigNumRef

impl UnwindSafe for BigNumRef

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> ToString for T where
    T: Display + ?Sized
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.