x509-verification: drop cryptography-key-parsing dependency (#14272)

Move the Pkcs1RsaPublicKey ASN.1 struct into cryptography-x509::common
(next to SubjectPublicKeyInfo, where it naturally belongs) so that
cryptography-x509-verification no longer depends on
cryptography-key-parsing.

This removes the transitive dependency on openssl-sys, making
cryptography-x509-verification usable with alternative crypto backends
(e.g. aws-lc-rs) without requiring OpenSSL headers or libraries.

Author: edef1c

Cargo.lock

@@ -4,11 +4,7 @@
 
 use crate::{KeyParsingError, KeyParsingResult, KeySerializationResult};
 
-#[derive(asn1::Asn1Read, asn1::Asn1Write)]
-pub struct Pkcs1RsaPublicKey<'a> {
-    pub n: asn1::BigUint<'a>,
-    pub e: asn1::BigUint<'a>,
-}
+use cryptography_x509::common::Pkcs1RsaPublicKey;
 
 // RFC 8017, Section A.1.2
 #[derive(asn1::Asn1Read, asn1::Asn1Write)]

src/rust/cryptography-key-parsing/src/rsa.rs

@@ -10,7 +10,6 @@ license.workspace = true
 [dependencies]
 asn1.workspace = true
 cryptography-x509 = { path = "../cryptography-x509" }
-cryptography-key-parsing = { path = "../cryptography-key-parsing" }
 
 [dev-dependencies]
 pem.workspace = true

src/rust/cryptography-x509-verification/Cargo.toml

@@ -9,8 +9,8 @@ use std::ops::{Deref, Range};
 use std::sync::{Arc, LazyLock};
 
 use asn1::ObjectIdentifier;
-use cryptography_key_parsing::rsa::Pkcs1RsaPublicKey;
 use cryptography_x509::certificate::Certificate;
+use cryptography_x509::common::Pkcs1RsaPublicKey;
 use cryptography_x509::common::{
     AlgorithmIdentifier, AlgorithmParameters, EcParameters, RsaPssParameters, Time,
     PSS_SHA256_HASH_ALG, PSS_SHA256_MASK_GEN_ALG, PSS_SHA384_HASH_ALG, PSS_SHA384_MASK_GEN_ALG,

src/rust/cryptography-x509-verification/src/policy/mod.rs

@@ -192,6 +192,12 @@ pub struct SubjectPublicKeyInfo<'a> {
     pub subject_public_key: asn1::BitString<'a>,
 }
 
+#[derive(asn1::Asn1Read, asn1::Asn1Write)]
+pub struct Pkcs1RsaPublicKey<'a> {
+    pub n: asn1::BigUint<'a>,
+    pub e: asn1::BigUint<'a>,
+}
+
 #[derive(asn1::Asn1Read, asn1::Asn1Write, PartialEq, Eq, Hash, Clone)]
 pub struct AttributeTypeValue<'a> {
     pub type_id: asn1::ObjectIdentifier,