/rust/registry/src/index.crates.io-1949cf8c6b5b557f/openssl-0.10.62/src/util.rs

Source
use crate::error::ErrorStack;
use foreign_types::{ForeignType, ForeignTypeRef};
use libc::{c_char, c_int, c_void};
use std::any::Any;
use std::panic::{self, AssertUnwindSafe};
use std::slice;

/// Wraps a user-supplied callback and a slot for panics thrown inside the callback (while FFI
/// frames are on the stack).
///
/// When dropped, checks if the callback has panicked, and resumes unwinding if so.
pub struct CallbackState<F> {
    /// The user callback. Taken out of the `Option` when called.
    cb: Option<F>,
    /// If the callback panics, we place the panic object here, to be re-thrown once OpenSSL
    /// returns.
    panic: Option<Box<dyn Any + Send + 'static>>,
}

impl<F> CallbackState<F> {
    pub fn new(callback: F) -> Self {
        CallbackState {
            cb: Some(callback),
            panic: None,
        }
    }
}

impl<F> Drop for CallbackState<F> {
    fn drop(&mut self) {
        if let Some(panic) = self.panic.take() {
            panic::resume_unwind(panic);
        }
    }
}

/// Password callback function, passed to private key loading functions.
///
/// `cb_state` is expected to be a pointer to a `CallbackState`.
pub unsafe extern "C" fn invoke_passwd_cb<F>(
    buf: *mut c_char,
    size: c_int,
    _rwflag: c_int,
    cb_state: *mut c_void,
) -> c_int
where
    F: FnOnce(&mut [u8]) -> Result<usize, ErrorStack>,
{
    let callback = &mut *(cb_state as *mut CallbackState<F>);

    let result = panic::catch_unwind(AssertUnwindSafe(|| {
        let pass_slice = slice::from_raw_parts_mut(buf as *mut u8, size as usize);
        callback.cb.take().unwrap()(pass_slice)
    }));

    match result {
        Ok(Ok(len)) => len as c_int,
        Ok(Err(_)) => {
            // FIXME restore error stack
            0
        }
        Err(err) => {
            callback.panic = Some(err);
            0
        }
    }
}

pub trait ForeignTypeExt: ForeignType {
    unsafe fn from_ptr_opt(ptr: *mut Self::CType) -> Option<Self> {
        if ptr.is_null() {
            None
        } else {
            Some(Self::from_ptr(ptr))
        }
    }
}
impl<FT: ForeignType> ForeignTypeExt for FT {}

pub trait ForeignTypeRefExt: ForeignTypeRef {
    unsafe fn from_const_ptr<'a>(ptr: *const Self::CType) -> &'a Self {
        Self::from_ptr(ptr as *mut Self::CType)
    }

    unsafe fn from_const_ptr_opt<'a>(ptr: *const Self::CType) -> Option<&'a Self> {
        if ptr.is_null() {
            None
        } else {
            Some(Self::from_const_ptr(ptr as *mut Self::CType))
        }
    }
}
impl<FT: ForeignTypeRef> ForeignTypeRefExt for FT {}

Line	Count	Source
1		use crate::error::ErrorStack;
2		use foreign_types::{ForeignType, ForeignTypeRef};
3		use libc::{c_char, c_int, c_void};
4		use std::any::Any;
5		use std::panic::{self, AssertUnwindSafe};
6		use std::slice;
7
8		/// Wraps a user-supplied callback and a slot for panics thrown inside the callback (while FFI
9		/// frames are on the stack).
10		///
11		/// When dropped, checks if the callback has panicked, and resumes unwinding if so.
12		pub struct CallbackState<F> {
13		/// The user callback. Taken out of the `Option` when called.
14		cb: Option<F>,
15		/// If the callback panics, we place the panic object here, to be re-thrown once OpenSSL
16		/// returns.
17		panic: Option<Box<dyn Any + Send + 'static>>,
18		}
19
20		impl<F> CallbackState<F> {
21	0	pub fn new(callback: F) -> Self {
22	0	CallbackState {
23	0	cb: Some(callback),
24	0	panic: None,
25	0	}
26	0	}
27		}
28
29		impl<F> Drop for CallbackState<F> {
30	0	fn drop(&mut self) {
31	0	if let Some(panic) = self.panic.take() {
32	0	panic::resume_unwind(panic);
33	0	}
34	0	}
35		}
36
37		/// Password callback function, passed to private key loading functions.
38		///
39		/// `cb_state` is expected to be a pointer to a `CallbackState`.
40	0	pub unsafe extern "C" fn invoke_passwd_cb<F>(
41	0	buf: *mut c_char,
42	0	size: c_int,
43	0	_rwflag: c_int,
44	0	cb_state: *mut c_void,
45	0	) -> c_int
46	0	where
47	0	F: FnOnce(&mut [u8]) -> Result<usize, ErrorStack>,
48		{
49	0	let callback = &mut (cb_state as mut CallbackState<F>);
50
51	0	let result = panic::catch_unwind(AssertUnwindSafe(\|\| {
52	0	let pass_slice = slice::from_raw_parts_mut(buf as *mut u8, size as usize);
53	0	callback.cb.take().unwrap()(pass_slice)
54	0	}));
55
56	0	match result {
57	0	Ok(Ok(len)) => len as c_int,
58		Ok(Err(_)) => {
59		// FIXME restore error stack
60	0	0
61		}
62	0	Err(err) => {
63	0	callback.panic = Some(err);
64	0	0
65		}
66		}
67	0	}
68
69		pub trait ForeignTypeExt: ForeignType {
70	0	unsafe fn from_ptr_opt(ptr: *mut Self::CType) -> Option<Self> {
71	0	if ptr.is_null() {
72	0	None
73		} else {
74	0	Some(Self::from_ptr(ptr))
75		}
76	0	} Unexecuted instantiation: <openssl::stack::Stack<openssl::x509::GeneralName> as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::stack::Stack<openssl::x509::AccessDescription> as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::stack::Stack<openssl::x509::DistPoint> as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::pkey::PKey<openssl::pkey::Private> as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::stack::Stack<openssl::x509::X509> as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1Object as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::x509::GeneralName as openssl::util::ForeignTypeExt>::from_ptr_opt Unexecuted instantiation: <openssl::x509::X509 as openssl::util::ForeignTypeExt>::from_ptr_opt
77		}
78		impl<FT: ForeignType> ForeignTypeExt for FT {}
79
80		pub trait ForeignTypeRefExt: ForeignTypeRef {
81	0	unsafe fn from_const_ptr<'a>(ptr: *const Self::CType) -> &'a Self {
82	0	Self::from_ptr(ptr as *mut Self::CType)
83	0	} Unexecuted instantiation: <openssl::pkey::PKeyRef<openssl::pkey::Private> as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::stack::StackRef<openssl::srtp::SrtpProtectionProfile> as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::stack::StackRef<openssl::x509::X509> as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::ssl::SslCipherRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::ssl::SslSessionRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::srtp::SrtpProtectionProfileRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::asn1::Asn1TimeRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::asn1::Asn1ObjectRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::asn1::Asn1IntegerRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::asn1::Asn1BitStringRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::asn1::Asn1OctetStringRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::X509NameRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::X509PurposeRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::X509AlgorithmRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::X509NameEntryRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::X509Ref as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::ec::EcPointRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::bn::BigNumRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::asn1::Asn1GeneralizedTimeRef as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::store::X509LookupMethodRef<openssl::x509::store::File> as openssl::util::ForeignTypeRefExt>::from_const_ptr Unexecuted instantiation: <openssl::x509::store::X509LookupMethodRef<openssl::x509::store::HashDir> as openssl::util::ForeignTypeRefExt>::from_const_ptr
84
85	0	unsafe fn from_const_ptr_opt<'a>(ptr: *const Self::CType) -> Option<&'a Self> {
86	0	if ptr.is_null() {
87	0	None
88		} else {
89	0	Some(Self::from_const_ptr(ptr as *mut Self::CType))
90		}
91	0	} Unexecuted instantiation: <openssl::pkey::PKeyRef<openssl::pkey::Private> as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::stack::StackRef<openssl::srtp::SrtpProtectionProfile> as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::stack::StackRef<openssl::x509::X509> as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::ssl::SslCipherRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::ssl::SslSessionRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::srtp::SrtpProtectionProfileRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1TimeRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1ObjectRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1IntegerRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1BitStringRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1OctetStringRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::x509::X509NameRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::x509::X509AlgorithmRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::x509::X509NameEntryRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::x509::X509Ref as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt Unexecuted instantiation: <openssl::asn1::Asn1GeneralizedTimeRef as openssl::util::ForeignTypeRefExt>::from_const_ptr_opt
92		}
93		impl<FT: ForeignTypeRef> ForeignTypeRefExt for FT {}

Coverage Report

Created: 2026-09-28 06:12