Struct SslOptions

pub struct SslOptions(/* private fields */);

Options controlling the behavior of an SslContext.

Implementations

impl SslOptions

pub const DONT_INSERT_EMPTY_FRAGMENTS: SslOptions = _

Disables a countermeasure against an SSLv3/TLSv1.0 vulnerability affecting CBC ciphers.

pub const ALL: SslOptions = _

A “reasonable default” set of options which enables compatibility flags.

pub const NO_QUERY_MTU: SslOptions = _

Do not query the MTU.

Only affects DTLS connections.

pub const COOKIE_EXCHANGE: SslOptions = _

Enables Cookie Exchange as described in RFC 4347 Section 4.2.1.

Only affects DTLS connections.

pub const NO_TICKET: SslOptions = _

Disables the use of session tickets for session resumption.

pub const NO_SESSION_RESUMPTION_ON_RENEGOTIATION: SslOptions = _

Always start a new session when performing a renegotiation on the server side.

pub const NO_COMPRESSION: SslOptions = _

Disables the use of TLS compression.

pub const ALLOW_UNSAFE_LEGACY_RENEGOTIATION: SslOptions = _

Allow legacy insecure renegotiation with servers or clients that do not support secure renegotiation.

pub const SINGLE_ECDH_USE: SslOptions = _

Creates a new key for each session when using ECDHE.

This is always enabled in OpenSSL 1.1.0.

pub const SINGLE_DH_USE: SslOptions = _

Creates a new key for each session when using DHE.

This is always enabled in OpenSSL 1.1.0.

pub const CIPHER_SERVER_PREFERENCE: SslOptions = _

Use the server’s preferences rather than the client’s when selecting a cipher.

This has no effect on the client side.

pub const TLS_ROLLBACK_BUG: SslOptions = _

Disables version rollback attach detection.

pub const NO_SSLV2: SslOptions = _

Disables the use of SSLv2.

pub const NO_SSLV3: SslOptions = _

Disables the use of SSLv3.

pub const NO_TLSV1: SslOptions = _

Disables the use of TLSv1.0.

pub const NO_TLSV1_1: SslOptions = _

Disables the use of TLSv1.1.

pub const NO_TLSV1_2: SslOptions = _

Disables the use of TLSv1.2.

pub const NO_TLSV1_3: SslOptions = _

Disables the use of TLSv1.3.

Requires OpenSSL 1.1.1 or LibreSSL 3.4.0 or newer.

pub const NO_DTLSV1: SslOptions = _

Disables the use of DTLSv1.0

Requires OpenSSL 1.0.2 or LibreSSL 3.3.2 or newer.

pub const NO_DTLSV1_2: SslOptions = _

Disables the use of DTLSv1.2.

Requires OpenSSL 1.0.2 or LibreSSL 3.3.2 or newer.

pub const NO_SSL_MASK: SslOptions = _

Disables the use of all (D)TLS protocol versions.

This can be used as a mask when whitelisting protocol versions.

Requires OpenSSL 1.0.2 or newer.

Examples

Only support TLSv1.2:

use openssl::ssl::SslOptions;

let options = SslOptions::NO_SSL_MASK & !SslOptions::NO_TLSV1_2;

pub const NO_RENEGOTIATION: SslOptions = _

Disallow all renegotiation in TLSv1.2 and earlier.

Requires OpenSSL 1.1.0h or newer.

pub const ENABLE_MIDDLEBOX_COMPAT: SslOptions = _

Enable TLSv1.3 Compatibility mode.

Requires OpenSSL 1.1.1 or newer. This is on by default in 1.1.1, but a future version may have this disabled by default.

pub const PRIORITIZE_CHACHA: SslOptions = _

Prioritize ChaCha ciphers when preferred by clients.

Temporarily reprioritize ChaCha20-Poly1305 ciphers to the top of the server cipher list if a ChaCha20-Poly1305 cipher is at the top of the client cipher list. This helps those clients (e.g. mobile) use ChaCha20-Poly1305 if that cipher is anywhere in the server cipher list; but still allows other clients to use AES and other ciphers.

Requires enable SslOptions::CIPHER_SERVER_PREFERENCE. Requires OpenSSL 1.1.1 or newer.

impl SslOptions

pub const fn empty() -> SslOptions

Get a flags value with all bits unset.

pub const fn all() -> SslOptions

Get a flags value with all known bits set.

pub const fn bits(&self) -> u64

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u64) -> Option<SslOptions>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u64) -> SslOptions

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u64) -> SslOptions

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<SslOptions>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: SslOptions) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

pub const fn contains(&self, other: SslOptions) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

pub fn insert(&mut self, other: SslOptions)

The bitwise or (|) of the bits in two flags values.

pub fn remove(&mut self, other: SslOptions)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: SslOptions)

The bitwise exclusive-or (^) of the bits in two flags values.

pub fn set(&mut self, other: SslOptions, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: SslOptions) -> SslOptions

The bitwise and (&) of the bits in two flags values.

pub const fn union(self, other: SslOptions) -> SslOptions

The bitwise or (|) of the bits in two flags values.

pub const fn difference(self, other: SslOptions) -> SslOptions

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: SslOptions) -> SslOptions

The bitwise exclusive-or (^) of the bits in two flags values.

pub const fn complement(self) -> SslOptions

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl SslOptions

pub const fn iter(&self) -> Iter<SslOptions>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<SslOptions>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

Trait Implementations

impl Binary for SslOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl BitAnd for SslOptions

fn bitand(self, other: SslOptions) -> SslOptions

The bitwise and (&) of the bits in two flags values.

type Output = SslOptions

The resulting type after applying the & operator.

impl BitAndAssign for SslOptions

fn bitand_assign(&mut self, other: SslOptions)

The bitwise and (&) of the bits in two flags values.

impl BitOr for SslOptions

fn bitor(self, other: SslOptions) -> SslOptions

The bitwise or (|) of the bits in two flags values.

type Output = SslOptions

The resulting type after applying the | operator.

impl BitOrAssign for SslOptions

fn bitor_assign(&mut self, other: SslOptions)

The bitwise or (|) of the bits in two flags values.

impl BitXor for SslOptions

fn bitxor(self, other: SslOptions) -> SslOptions

The bitwise exclusive-or (^) of the bits in two flags values.

type Output = SslOptions

The resulting type after applying the ^ operator.

impl BitXorAssign for SslOptions

fn bitxor_assign(&mut self, other: SslOptions)

The bitwise exclusive-or (^) of the bits in two flags values.

impl Clone for SslOptions

fn clone(&self) -> SslOptions

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SslOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Extend<SslOptions> for SslOptions

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = SslOptions>,

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for SslOptions

const FLAGS: &'static [Flag<SslOptions>] = _

The set of defined flags.

type Bits = u64

The underlying bits type.

fn bits(&self) -> u64

Get the underlying bits value.

fn from_bits_retain(bits: u64) -> SslOptions

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in two flags values.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call Flags::insert when value is true or Flags::remove when value is false.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl FromIterator<SslOptions> for SslOptions

fn from_iter<T>(iterator: T) -> SslOptions

where T: IntoIterator<Item = SslOptions>,

The bitwise or (|) of the bits in each flags value.

impl Hash for SslOptions

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntoIterator for SslOptions

type Item = SslOptions

The type of the elements being iterated over.

type IntoIter = Iter<SslOptions>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <SslOptions as IntoIterator>::IntoIter

Creates an iterator from a value.

impl LowerHex for SslOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Not for SslOptions

fn not(self) -> SslOptions

The bitwise negation (!) of the bits in a flags value, truncating the result.

type Output = SslOptions

The resulting type after applying the ! operator.

impl Octal for SslOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Ord for SslOptions

fn cmp(&self, other: &SslOptions) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SslOptions

fn eq(&self, other: &SslOptions) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for SslOptions

fn partial_cmp(&self, other: &SslOptions) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Sub for SslOptions

fn sub(self, other: SslOptions) -> SslOptions

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = SslOptions

The resulting type after applying the - operator.

impl SubAssign for SslOptions

fn sub_assign(&mut self, other: SslOptions)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl UpperHex for SslOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for SslOptions

impl Eq for SslOptions

impl StructuralPartialEq for SslOptions