32 lines
827 B
Rust
32 lines
827 B
Rust
use crate::error::ErrorStack;
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use crate::{cvt_0i, cvt_p, ffi};
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use foreign_types::ForeignType;
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foreign_type_and_impl_send_sync! {
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type CType = ffi::EVP_HPKE_KEY;
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fn drop = ffi::EVP_HPKE_KEY_free;
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pub struct HpkeKey;
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}
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impl HpkeKey {
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/// Allocates and initializes a key with the `EVP_HPKE_KEY` type using the
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/// `EVP_hpke_x25519_hkdf_sha256` KEM algorithm.
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pub fn dhkem_p256_sha256(pkey: &[u8]) -> Result<HpkeKey, ErrorStack> {
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unsafe {
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ffi::init();
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let hpke = cvt_p(ffi::EVP_HPKE_KEY_new()).map(|p| HpkeKey::from_ptr(p))?;
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cvt_0i(ffi::EVP_HPKE_KEY_init(
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hpke.as_ptr(),
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ffi::EVP_hpke_x25519_hkdf_sha256(),
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pkey.as_ptr(),
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pkey.len(),
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))?;
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Ok(hpke)
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}
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}
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}
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