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Author SHA1 Message Date
xuxt
f5b7da921a RC证书解析部分代码 (#2) 
Co-authored-by: xiuting.xu <xiutingxt.xu@gmail.com>
Reviewed-on: #2
Reviewed-by: yuyr <yuyr@zgclab.edu.cn>
Co-authored-by: xuxt <xuxt@zgclab.edu.cn>
Co-committed-by: xuxt <xuxt@zgclab.edu.cn>
 2026-02-03 10:01:32 +08:00
5 changed files with 520 additions and 393 deletions
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3
Cargo.toml
View File

@ -10,3 +10,6 @@ thiserror = "2.0.18"
time = "0.3.45"
x509-parser = { version = "0.18.0", features = ["verify"] }
url = "2.5.8"
asn1-rs = "0.7.1"
asn1-rs-derive = "0.6.0"
asn1 = "0.23.0"

3
src/data_model/oids.rs
View File

@ -11,3 +11,6 @@ pub const OID_AD_OCSP: &str = "1.3.6.1.5.5.7.48.1";
pub const OID_SUBJECT_INFO_ACCESS: &str = "1.3.6.1.5.5.7.1.11";
pub const OID_CERTIFICATE_POLICIES: &str = "2.5.29.32";
pub const OID_SHA256_WITH_RSA_ENCRYPTION: &str = "1.2.840.113549.1.1.11";
pub const OID_IP_ADDRESS_BLOCKS: &str = "1.3.6.1.5.5.7.1.7";
pub const OID_AS_IDENTIFIERS: &str = "1.3.6.1.5.5.7.1.8";
pub const OID_RPKI_CP: &str = "1.3.6.1.5.5.7.14.2";

900
src/data_model/rc.rs
View File

@ -1,3 +1,4 @@
use asn1::{parse, BitString};
use der_parser::asn1_rs::Tag;
use der_parser::num_bigint::BigUint;
use url::Url;
@ -5,9 +6,11 @@ use time::OffsetDateTime;
use x509_parser::x509::AlgorithmIdentifier;
use x509_parser::prelude::{Validity, KeyUsage, X509Certificate, FromDer,
X509Version, X509Extension, ParsedExtension,
CRLDistributionPoints, DistributionPointName, GeneralName};
DistributionPointName, GeneralName};
use crate::data_model::crl::CrlDecodeError;
use crate::data_model::resources::ip_resources::IPAddrBlocks;
use crate::data_model::resources::ip_resources::{Afi, IPAddrBlocks, IPAddress, IPAddressChoice,
IPAddressOrRange, IPAddressPrefix, IPAddressRange,
IPAddressFamily};
use crate::data_model::resources::as_resources::ASIdentifiers;
use crate::data_model::oids;
@ -127,393 +130,510 @@ pub enum ResourceCertError {
#[error("Empty AuthorityInfoAccess!")]
EmptyAuthorityInfoAccess,
#[error("Certificate Policies must exists one policy")]
CertificatePoliciesTooMany,
#[error("Certificate Policies invalid")]
CertificatePoliciesInvalid,
}
// impl ResourceCert{
// pub fn from_der(cert_der: &[u8]) -> Result<Self, ResourceCertError> {
// let (rem, x509_rc) = X509Certificate::from_der(cert_der)
// .map_err(|e| ResourceCertError::ParseCert(e.to_string()))?;
//
// if !rem.is_empty() {
// return Err(ResourceCertError::TrailingBytes(rem.len()));
// }
//
// // 校验
// parse_and_validate_cert(x509_rc)
// }
//
//
//
// }
//
// fn parse_and_validate_cert(x509_rc: X509Certificate) -> Result<ResourceCert, ResourceCertError> {
// ///逐个校验RC的内容, 如果有任何一个校验失败, 则返回错误
//
// // 1. 版本号必须是V3
// let version = match x509_rc.version() {
// X509Version::V3 => X509Version::V3,
// v => {
// return Err(ResourceCertError::InvalidVersion(v.0));
// }
// };
//
// // 2.校验签名算法
// // 2.1. 校验外层的签名算法与里层的一致
// let outer = &x509_rc.signature_algorithm;
// let inner = &x509_rc.tbs_certificate.signature;
//
// if outer.algorithm != inner.algorithm || outer.parameters != inner.parameters {
// return Err(ResourceCertError::SignatureAlgorithmMismatch);
// }
// //2.2 RPKI的签名算法必须是rsaWithSHA256
// let signature_algorithm = &x509_rc.signature_algorithm;
// if signature_algorithm.algorithm.to_id_string() != oids::OID_SHA256_WITH_RSA_ENCRYPTION {
// return Err(ResourceCertError::UnsupportedSignatureAlgorithm);
// }
// validate_sig_params(signature_algorithm)?;
//
// // 3. 校验Validity
// let validity = x509_rc.validity();
// validate_validity(validity, OffsetDateTime::now_utc())?;
//
// // 4. SubjectPublicKeyInfo
// let subject_public_key_info = x509_rc.tbs_certificate.subject_pki;
//
// let extensions = parse_and_validate_extensions(x509_rc.extensions())?;
//
// Ok(ResourceCert {
// cert_der: x509_rc.to_der().to_vec(),
// version: version.0,
// serial_number: x509_rc.serial(),
// signature_algorithm_oid: signature_algorithm.algorithm.to_id_string(),
// issuer_dn: x509_rc.issuer().to_string(),
// subject_dn: x509_rc.subject().to_string(),
// validity,
// subject_public_key_info: SubjectPublicKeyInfo {
// // algorithm_oid: x509_rc.tbs_certificate.subject_pki.algorithm.algorithm.to_id_string(),
// // subject_public_key: x509_rc.tbs_certificate.subject_pki.subject_public_key.unused_bits,
// },
// extensions,
// })
//
//
// }
//
// fn validate_sig_params(sig: &AlgorithmIdentifier<'_>) -> Result<(), CrlDecodeError> {
// match sig.parameters.as_ref() {
// None => Ok(()),
// Some(p) if p.tag() == Tag::Null => Ok(()),
// Some(_p) => Err(CrlDecodeError::InvalidSignatureAlgorithmParameters),
// }
// }
//
// fn validate_validity(
// validity: &Validity,
// now: OffsetDateTime,
// ) -> Result<(), ResourceCertError> {
// let not_before = validity.not_before.to_datetime();
// let not_after = validity.not_after.to_datetime();
//
// if not_after < not_before {
// return Err(ResourceCertError::InvalidValidityRange);
// }
//
// if now < not_before {
// return Err(ResourceCertError::NotYetValid);
// }
//
// if now > not_after {
// return Err(ResourceCertError::Expired);
// }
//
// Ok(())
// }
//
//
// pub fn parse_and_validate_extensions(
// exts: &[X509Extension<'_>],
// ) -> Result<RcExtension, ResourceCertError> {
// let mut basic_constraints = None;
// let mut ip_addr_blocks = None;
// let mut as_identifiers = None;
// let mut ski = None;
// let mut aki = None;
// let mut crl_dp = None;
// let mut aia = None;
// let mut sia = None;
// let mut key_usage = None;
// let mut extended_key_usage = None;
// let mut certificate_policies = None;
//
// for ext in exts {
// let oid = ext.oid.to_id_string();
// let critical = ext.critical;
// match oid.as_str() {
// oids::OID_BASIC_CONSTRAINTS => {
// if basic_constraints.is_some() {
// return Err(ResourceCertError::DuplicateExtension("basicConstraints".into()));
// }
// if !critical {
// return Err(ResourceCertError::CriticalError("basicConstraints".into(), "critical".into()));
// }
// let bc = parse_basic_constraints(ext)?;
// basic_constraints = Some(bc);
// }
// oids::OID_SUBJECT_KEY_IDENTIFIER => {
// if ski.is_some() {
// return Err(ResourceCertError::DuplicateExtension("subjectKeyIdentifier".into()));
// }
// if critical {
// return Err(ResourceCertError::CriticalError("subjectKeyIdentifier".into(), "non-critical".into()));
// }
// let s = parse_subject_key_identifier(ext)?;
// ski = Some(s);
// }
// oids::OID_AUTHORITY_KEY_IDENTIFIER => {
// if aki.is_some() {
// return Err(ResourceCertError::DuplicateExtension("authorityKeyIdentifier".into()));
// }
// if critical {
// return Err(ResourceCertError::CriticalError("authorityKeyIdentifier".into(), "non-critical".into()));
// }
// let a = parse_authority_key_identifier(ext)?;
// aki = Some(a);
// }
// oids::OID_KEY_USAGE => {
// if key_usage.is_some() {
// return Err(ResourceCertError::DuplicateExtension("keyUsage".into()));
// }
// if !critical {
// return Err(ResourceCertError::CriticalError("keyUsage".into(), "critical".into()));
// }
// let ku = parse_key_usage(ext)?;
// key_usage = Some(ku);
// }
// oids::OID_EXTENDED_KEY_USAGE => {
// if extended_key_usage.is_some() {
// return Err(ResourceCertError::DuplicateExtension("extendedKeyUsage".into()));
// }
// if critical {
// return Err(ResourceCertError::CriticalError("extendedKeyUsage".into(), "non-critical".into()));
// }
// let eku = oids::OID_EXTENDED_KEY_USAGE;
// }
// oids::OID_CRL_DISTRIBUTION_POINTS => {
// if crl_dp.is_some() {
// return Err(ResourceCertError::DuplicateExtension("crlDistributionPoints".into()));
// }
// if critical {
// return Err(ResourceCertError::CriticalError("crlDistributionPoints".into(), "non-critical".into()));
// }
// let cdp = parse_crl_distribution_points(ext)?;
// crl_dp = Some(cdp);
// }
// oids::OID_AUTHORITY_INFO_ACCESS => {
// if aia.is_some() {
// return Err(ResourceCertError::DuplicateExtension("authorityInfoAccess".into()));
// }
// if critical {
// return Err(ResourceCertError::CriticalError("authorityInfoAccess".into(), "non-critical".into()));
// }
// let p_aia = parse_authority_info_access(ext)?;
// aia = Some(p_aia);
// }
// oids::OID_SUBJECT_INFO_ACCESS => {
// if sia.is_some() {
// return Err(ResourceCertError::DuplicateExtension("subjectInfoAccess".into()));
// }
// if critical {
// return Err(ResourceCertError::CriticalError("subjectInfoAccess".into(), "non-critical".into()));
// }
// let p_sia = parse_subject_info_access(ext)?;
// sia = Some(p_sia);
// }
// oids::OID_CERTIFICATE_POLICIES => {
// if certificate_policies.is_some() {
// return Err(ResourceCertError::DuplicateExtension("certificatePolicies".into()));
// }
// if !critical {
// return Err(ResourceCertError::CriticalError("certificatePolicies".into(), "critical".into()));
// }
// let p_cp = parse_certificate_policies(ext)?;
// certificate_policies = Some(p_cp);
// }
// }
//
//
// }
// Ok(RcExtension {
// basic_constraints,
// ip_addr_blocks,
// as_identifiers,
// subject_key_id: ski,
// authority_key_id: aki,
// crl_distribution_points: crl_dp,
// authority_info_access: aia,
// })
// }
//
// fn parse_basic_constraints(ext: &X509Extension<'_>) -> Result<bool, ResourceCertError> {
// let ParsedExtension::BasicConstraints(bc) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert("basicConstraints parse failed".into()));
// };
// Ok(bc.ca)
// }
//
// fn parse_subject_key_identifier(ext: &X509Extension<'_>) -> Result<Vec<u8>, ResourceCertError> {
// let ParsedExtension::SubjectKeyIdentifier(s) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert("subjectKeyIdentifier parse failed".into()));
// };
// Ok(s.0.to_vec())
// }
//
// fn parse_authority_key_identifier(ext: &X509Extension<'_>) -> Result<Vec<u8>, ResourceCertError> {
// let ParsedExtension::AuthorityKeyIdentifier(aki) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert("authorityKeyIdentifier parse failed".into()));
// };
// let key_id = aki
// .key_identifier
// .as_ref()
// .ok_or(ResourceCertError::MissingParameter("key_identifier".into()))?;
//
// if aki.authority_cert_issuer.is_some() {
// return Err(ResourceCertError::UnexceptedParameter("authority_cert_issuer".into()));
// }
// if aki.authority_cert_serial.is_some() {
// return Err(ResourceCertError::UnexceptedParameter("authority_cert_serial".into()));
// }
//
//
// Ok(key_id.0.to_vec())
// }
//
// fn parse_key_usage(ext: &X509Extension<'_>) -> Result<KeyUsage, ResourceCertError> {
// let ParsedExtension::KeyUsage(ku) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert("keyUsage parse failed".into()));
// };
// Ok(ku.clone())
// }
//
// fn parse_crl_distribution_points(ext: &X509Extension<'_>) -> Result<Vec<Url>, ResourceCertError> {
// let ParsedExtension::CRLDistributionPoints(cdp) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert("crlDistributionPoints parse failed".into()));
// };
// let mut urls = Vec::new();
// for point in cdp.points.iter() {
// if point.reasons.is_some() {
// return Err(ResourceCertError::UnexceptedParameter("reasons".into()));
// }
// if point.crl_issuer.is_some() {
// return Err(ResourceCertError::UnexceptedParameter("crl_issuer".into()));
// }
//
// let dp_name = point.distribution_point.as_ref()
// .ok_or(ResourceCertError::MissingParameter("distribution_point".into()))?;
// match dp_name {
// DistributionPointName::FullName(names) => {
// for name in names {
// match name {
// GeneralName::URI(uri) => {
// let url = Url::parse(uri)
// .map_err(|_| ResourceCertError::InvalidUri(uri.to_string()))?;
// urls.push(url);
// }
// _ => {
// return Err(ResourceCertError::UnsupportedGeneralName("distribution_point".into()));
// }
// }
// }
//
// }
// DistributionPointName::NameRelativeToCRLIssuer(_) => {
// return Err(ResourceCertError::UnsupportedCrlDistributionPoint);
// }
// }
// }
// if urls.is_empty() {
// return Err(ResourceCertError::MissingParameter("distribution_point".into()));
// }
// Ok(urls)
// }
//
// fn parse_authority_info_access(
// ext: &X509Extension<'_>,
// ) -> Result<Vec<AccessDescription>, ResourceCertError> {
// let ParsedExtension::AuthorityInfoAccess(aia) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert(
// "authorityInfoAccess parse failed".into(),
// ));
// };
//
// let mut access_descriptions = Vec::new();
//
// for access in &aia.accessdescs {
// let access_method_oid = access.access_method.to_id_string();
//
// let uri = match &access.access_location {
// GeneralName::URI(uri) => uri,
// _ => {
// return Err(ResourceCertError::InvalidAccessLocationType);
// }
// };
//
// let url = Url::parse(uri)
// .map_err(|_| ResourceCertError::InvalidUri(uri.to_string()))?;
//
// access_descriptions.push(AccessDescription {
// access_method_oid,
// access_location: url,
// });
// }
//
// if access_descriptions.is_empty() {
// return Err(ResourceCertError::EmptyAuthorityInfoAccess);
// }
//
// Ok(access_descriptions)
// }
//
// fn parse_subject_info_access(ext: &X509Extension<'_>) -> Result<Vec<AccessDescription>, ResourceCertError> {
// let ParsedExtension::SubjectInfoAccess(sia) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert(
// "subjectInfoAccess parse failed".into(),
// ));
// };
// let mut access_descriptions = Vec::new();
//
// for access in &sia.accessdescs {
// let access_method_oid = access.access_method.to_id_string();
//
// // accessLocation: MUST be URI in RPKI
// let uri = match &access.access_location {
// GeneralName::URI(uri) => uri,
// _ => {
// return Err(ResourceCertError::InvalidAccessLocationType);
// }
// };
//
// let url = Url::parse(uri)
// .map_err(|_| ResourceCertError::InvalidUri(uri.to_string()))?;
//
// access_descriptions.push(AccessDescription {
// access_method_oid,
// access_location: url,
// });
// }
//
// if access_descriptions.is_empty() {
// return Err(ResourceCertError::EmptyAuthorityInfoAccess);
// }
//
// Ok(access_descriptions)
// }
//
// fn parse_certificate_policies(ext: &X509Extension<'_>) -> Result<Vec<PolicyInformation>, ResourceCertError> {
// let ParsedExtension::CertificatePolicies(cp) = ext.parsed_extension() else {
// return Err(ResourceCertError::ParseCert(
// "certificatePolicies parse failed".into(),
// ));
// };
// let mut policies = Vec::new();
//
// }
impl ResourceCert{
pub fn from_der(cert_der: &[u8]) -> Result<Self, ResourceCertError> {
let (rem, x509_rc) = X509Certificate::from_der(cert_der)
.map_err(|e| ResourceCertError::ParseCert(e.to_string()))?;
if !rem.is_empty() {
return Err(ResourceCertError::TrailingBytes(rem.len()));
}
// 校验
parse_and_validate_cert(x509_rc)
}
}
fn parse_and_validate_cert(x509_rc: X509Certificate) -> Result<ResourceCert, ResourceCertError> {
///逐个校验RC的内容, 如果有任何一个校验失败, 则返回错误
// 1. 版本号必须是V3
let version = match x509_rc.version() {
X509Version::V3 => X509Version::V3,
v => {
return Err(ResourceCertError::InvalidVersion(v.0));
}
};
// 2.校验签名算法
// 2.1. 校验外层的签名算法与里层的一致
let outer = &x509_rc.signature_algorithm;
let inner = &x509_rc.tbs_certificate.signature;
if outer.algorithm != inner.algorithm || outer.parameters != inner.parameters {
return Err(ResourceCertError::SignatureAlgorithmMismatch);
}
//2.2 RPKI的签名算法必须是rsaWithSHA256
let signature_algorithm = &x509_rc.signature_algorithm;
if signature_algorithm.algorithm.to_id_string() != oids::OID_SHA256_WITH_RSA_ENCRYPTION {
return Err(ResourceCertError::UnsupportedSignatureAlgorithm);
}
validate_sig_params(signature_algorithm)?;
// 3. 校验Validity
let validity = x509_rc.validity();
validate_validity(validity, OffsetDateTime::now_utc())?;
// 4. SubjectPublicKeyInfo
let subject_public_key_info = x509_rc.tbs_certificate.subject_pki;
let extensions = parse_and_validate_extensions(x509_rc.extensions())?;
// TODO
Ok(ResourceCert {
})
}
fn validate_sig_params(sig: &AlgorithmIdentifier<'_>) -> Result<(), CrlDecodeError> {
match sig.parameters.as_ref() {
None => Ok(()),
Some(p) if p.tag() == Tag::Null => Ok(()),
Some(_p) => Err(CrlDecodeError::InvalidSignatureAlgorithmParameters),
}
}
fn validate_validity(
validity: &Validity,
now: OffsetDateTime,
) -> Result<(), ResourceCertError> {
let not_before = validity.not_before.to_datetime();
let not_after = validity.not_after.to_datetime();
if not_after < not_before {
return Err(ResourceCertError::InvalidValidityRange);
}
if now < not_before {
return Err(ResourceCertError::NotYetValid);
}
if now > not_after {
return Err(ResourceCertError::Expired);
}
Ok(())
}
pub fn parse_and_validate_extensions(
exts: &[X509Extension<'_>],
) -> Result<RcExtension, ResourceCertError> {
let mut basic_constraints = None;
let mut ip_addr_blocks = None;
let mut as_identifiers = None;
let mut ski = None;
let mut aki = None;
let mut crl_dp = None;
let mut aia = None;
let mut sia = None;
let mut key_usage = None;
let mut extended_key_usage = None;
let mut certificate_policies = None;
for ext in exts {
let oid = ext.oid.to_id_string();
let critical = ext.critical;
match oid.as_str() {
oids::OID_BASIC_CONSTRAINTS => {
if basic_constraints.is_some() {
return Err(ResourceCertError::DuplicateExtension("basicConstraints".into()));
}
if !critical {
return Err(ResourceCertError::CriticalError("basicConstraints".into(), "critical".into()));
}
let bc = parse_basic_constraints(ext)?;
basic_constraints = Some(bc);
}
oids::OID_SUBJECT_KEY_IDENTIFIER => {
if ski.is_some() {
return Err(ResourceCertError::DuplicateExtension("subjectKeyIdentifier".into()));
}
if critical {
return Err(ResourceCertError::CriticalError("subjectKeyIdentifier".into(), "non-critical".into()));
}
let s = parse_subject_key_identifier(ext)?;
ski = Some(s);
}
oids::OID_AUTHORITY_KEY_IDENTIFIER => {
if aki.is_some() {
return Err(ResourceCertError::DuplicateExtension("authorityKeyIdentifier".into()));
}
if critical {
return Err(ResourceCertError::CriticalError("authorityKeyIdentifier".into(), "non-critical".into()));
}
let a = parse_authority_key_identifier(ext)?;
aki = Some(a);
}
oids::OID_KEY_USAGE => {
if key_usage.is_some() {
return Err(ResourceCertError::DuplicateExtension("keyUsage".into()));
}
if !critical {
return Err(ResourceCertError::CriticalError("keyUsage".into(), "critical".into()));
}
let ku = parse_key_usage(ext)?;
key_usage = Some(ku);
}
oids::OID_EXTENDED_KEY_USAGE => {
if extended_key_usage.is_some() {
return Err(ResourceCertError::DuplicateExtension("extendedKeyUsage".into()));
}
if critical {
return Err(ResourceCertError::CriticalError("extendedKeyUsage".into(), "non-critical".into()));
}
let eku = oids::OID_EXTENDED_KEY_USAGE;
}
oids::OID_CRL_DISTRIBUTION_POINTS => {
if crl_dp.is_some() {
return Err(ResourceCertError::DuplicateExtension("crlDistributionPoints".into()));
}
if critical {
return Err(ResourceCertError::CriticalError("crlDistributionPoints".into(), "non-critical".into()));
}
let cdp = parse_crl_distribution_points(ext)?;
crl_dp = Some(cdp);
}
oids::OID_AUTHORITY_INFO_ACCESS => {
if aia.is_some() {
return Err(ResourceCertError::DuplicateExtension("authorityInfoAccess".into()));
}
if critical {
return Err(ResourceCertError::CriticalError("authorityInfoAccess".into(), "non-critical".into()));
}
let p_aia = parse_authority_info_access(ext)?;
aia = Some(p_aia);
}
oids::OID_SUBJECT_INFO_ACCESS => {
if sia.is_some() {
return Err(ResourceCertError::DuplicateExtension("subjectInfoAccess".into()));
}
if critical {
return Err(ResourceCertError::CriticalError("subjectInfoAccess".into(), "non-critical".into()));
}
let p_sia = parse_subject_info_access(ext)?;
sia = Some(p_sia);
}
oids::OID_CERTIFICATE_POLICIES => {
if certificate_policies.is_some() {
return Err(ResourceCertError::DuplicateExtension("certificatePolicies".into()));
}
if !critical {
return Err(ResourceCertError::CriticalError("certificatePolicies".into(), "critical".into()));
}
let p_cp = parse_certificate_policies(ext)?;
certificate_policies = Some(p_cp);
}
oids::OID_IP_ADDRESS_BLOCKS => {
if ip_addr_blocks.is_some() {
return Err(ResourceCertError::DuplicateExtension("ipAddressBlocks".into()));
}
if !critical {
return Err(ResourceCertError::CriticalError("ipAddressBlocks".into(), "critical".into()));
}
let p_ip = parse_ip_address_blocks(ext)?;
ip_addr_blocks = Some(p_ip);
}
oids::OID_AS_IDENTIFIERS => {
if as_identifiers.is_some() {
return Err(ResourceCertError::DuplicateExtension("asIdentifiers".into()));
}
if !critical {
return Err(ResourceCertError::CriticalError("asIdentifiers".into(), "critical".into()));
}
let p_as = parse_as_identifiers(ext)?;
as_identifiers = Some(p_as);
}
}
}
// TODO:
Ok(RcExtension {
}
}
fn parse_basic_constraints(ext: &X509Extension<'_>) -> Result<bool, ResourceCertError> {
let ParsedExtension::BasicConstraints(bc) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert("basicConstraints parse failed".into()));
};
Ok(bc.ca)
}
fn parse_subject_key_identifier(ext: &X509Extension<'_>) -> Result<Vec<u8>, ResourceCertError> {
let ParsedExtension::SubjectKeyIdentifier(s) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert("subjectKeyIdentifier parse failed".into()));
};
Ok(s.0.to_vec())
}
fn parse_authority_key_identifier(ext: &X509Extension<'_>) -> Result<Vec<u8>, ResourceCertError> {
let ParsedExtension::AuthorityKeyIdentifier(aki) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert("authorityKeyIdentifier parse failed".into()));
};
let key_id = aki
.key_identifier
.as_ref()
.ok_or(ResourceCertError::MissingParameter("key_identifier".into()))?;
if aki.authority_cert_issuer.is_some() {
return Err(ResourceCertError::UnexceptedParameter("authority_cert_issuer".into()));
}
if aki.authority_cert_serial.is_some() {
return Err(ResourceCertError::UnexceptedParameter("authority_cert_serial".into()));
}
Ok(key_id.0.to_vec())
}
fn parse_key_usage(ext: &X509Extension<'_>) -> Result<KeyUsage, ResourceCertError> {
let ParsedExtension::KeyUsage(ku) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert("keyUsage parse failed".into()));
};
Ok(ku.clone())
}
fn parse_crl_distribution_points(ext: &X509Extension<'_>) -> Result<Vec<Url>, ResourceCertError> {
let ParsedExtension::CRLDistributionPoints(cdp) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert("crlDistributionPoints parse failed".into()));
};
let mut urls = Vec::new();
for point in cdp.points.iter() {
if point.reasons.is_some() {
return Err(ResourceCertError::UnexceptedParameter("reasons".into()));
}
if point.crl_issuer.is_some() {
return Err(ResourceCertError::UnexceptedParameter("crl_issuer".into()));
}
let dp_name = point.distribution_point.as_ref()
.ok_or(ResourceCertError::MissingParameter("distribution_point".into()))?;
match dp_name {
DistributionPointName::FullName(names) => {
for name in names {
match name {
GeneralName::URI(uri) => {
let url = Url::parse(uri)
.map_err(|_| ResourceCertError::InvalidUri(uri.to_string()))?;
urls.push(url);
}
_ => {
return Err(ResourceCertError::UnsupportedGeneralName("distribution_point".into()));
}
}
}
}
DistributionPointName::NameRelativeToCRLIssuer(_) => {
return Err(ResourceCertError::UnsupportedCrlDistributionPoint);
}
}
}
if urls.is_empty() {
return Err(ResourceCertError::MissingParameter("distribution_point".into()));
}
Ok(urls)
}
fn parse_authority_info_access(
ext: &X509Extension<'_>,
) -> Result<Vec<AccessDescription>, ResourceCertError> {
let ParsedExtension::AuthorityInfoAccess(aia) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert(
"authorityInfoAccess parse failed".into(),
));
};
let mut access_descriptions = Vec::new();
for access in &aia.accessdescs {
let access_method_oid = access.access_method.to_id_string();
let uri = match &access.access_location {
GeneralName::URI(uri) => uri,
_ => {
return Err(ResourceCertError::InvalidAccessLocationType);
}
};
let url = Url::parse(uri)
.map_err(|_| ResourceCertError::InvalidUri(uri.to_string()))?;
access_descriptions.push(AccessDescription {
access_method_oid,
access_location: url,
});
}
if access_descriptions.is_empty() {
return Err(ResourceCertError::EmptyAuthorityInfoAccess);
}
Ok(access_descriptions)
}
fn parse_subject_info_access(ext: &X509Extension<'_>) -> Result<Vec<AccessDescription>, ResourceCertError> {
let ParsedExtension::SubjectInfoAccess(sia) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert(
"subjectInfoAccess parse failed".into(),
));
};
let mut access_descriptions = Vec::new();
for access in &sia.accessdescs {
let access_method_oid = access.access_method.to_id_string();
// accessLocation: MUST be URI in RPKI
let uri = match &access.access_location {
GeneralName::URI(uri) => uri,
_ => {
return Err(ResourceCertError::InvalidAccessLocationType);
}
};
let url = Url::parse(uri)
.map_err(|_| ResourceCertError::InvalidUri(uri.to_string()))?;
access_descriptions.push(AccessDescription {
access_method_oid,
access_location: url,
});
}
if access_descriptions.is_empty() {
return Err(ResourceCertError::EmptyAuthorityInfoAccess);
}
Ok(access_descriptions)
}
fn parse_certificate_policies(ext: &X509Extension<'_>) -> Result<Vec<PolicyInformation>, ResourceCertError> {
let ParsedExtension::CertificatePolicies(cp) = ext.parsed_extension() else {
return Err(ResourceCertError::ParseCert(
"certificatePolicies parse failed".into(),
));
};
let mut policies = Vec::new();
if cp.len() > 1 {
return Err(ResourceCertError::CertificatePoliciesTooMany);
}
let policy_info = cp.first().unwrap();
let policy_id = policy_info.policy_id.to_id_string();
if policy_id != oids::OID_RPKI_CP {
return Err(ResourceCertError::CertificatePoliciesInvalid);
}
let policy_info = PolicyInformation{
policy_oid: policy_id,
};
policies.push(policy_info);
Ok(policies)
}
fn bitstring_to_ip(b: &BitString, afi: &Afi) -> Result<IPAddress, ResourceCertError> {
let bytes = b.as_bytes();
let ip = match afi {
Afi::Ipv4 => {
if bytes.len() != 4 { return Err(ResourceCertError::ParseCert("IPv4 length mismatch".into())); }
u32::from_be_bytes([bytes[0], bytes[1], bytes[2], bytes[3]]) as u128
},
Afi::Ipv6 => {
if bytes.len() != 16 { return Err(ResourceCertError::ParseCert("IPv6 length mismatch".into())); }
u128::from_be_bytes([
bytes[0], bytes[1], bytes[2], bytes[3],
bytes[4], bytes[5], bytes[6], bytes[7],
bytes[8], bytes[9], bytes[10], bytes[11],
bytes[12], bytes[13], bytes[14], bytes[15],
])
},
};
Ok(IPAddress(ip))
}
fn parse_ip_address_blocks(ext: &X509Extension<'_>) -> Result<IPAddrBlocks, ResourceCertError> {
let ip_blocks_der = ext.value;
let ips = parse(ip_blocks_der, |p| {
// 顶层 SEQUENCE OF IPAddressFamily
let mut ip_families = Vec::new();
p.read_sequence_of(|p2| {
// 每个 IPAddressFamily 是 SEQUENCE { addressFamily OCTET STRING, ipAddressChoice }
p2.read_sequence(|p3| {
let address_family_bytes = p3.read_element::<&[u8]>()?;
let afi = match address_family_bytes {
[0,1] => Afi::Ipv4,
[0,2] => Afi::Ipv6,
_ => return Err(asn1::ParseError::new(asn1::ParseErrorKind::InvalidValue)),
};
// 解析 IPAddressChoice
let ip_address_choice = {
let peek_tag = p3.peek_tag()?;
match peek_tag.tag_number() {
5 => IPAddressChoice::Inherit, // NULL
16 => { // SEQUENCE OF IPAddressOrRange
let ranges = p3.read_sequence_of(|p4| {
// 解析 IPAddressOrRange CHOICE
let peek = p4.peek_tag()?.tag_number();
if peek == 16 { // SEQUENCE -> AddressPrefix
let (addr_bytes, prefix_len): (&[u8], u8) = p4.read_sequence(|p5| {
let addr = p5.read_element::<BitString>()?.as_bytes();
let prefix_len = addr.len() as u8 * 8; // 简化：用字节长度推前缀
Ok((addr, prefix_len))
})?;
Ok(IPAddressOrRange::AddressPrefix(IPAddressPrefix{
address: bitstring_to_ip(addr_bytes, &afi)?,
prefix_length: prefix_len,
}))
} else {
// AddressRange
let (min_bytes, max_bytes) = p4.read_sequence(|p5| {
let min = p5.read_element::<BitString>()?.as_bytes();
let max = p5.read_element::<BitString>()?.as_bytes();
Ok((min, max))
})?;
Ok(IPAddressOrRange::AddressRange(IPAddressRange{
min: bitstring_to_ip(min_bytes, &afi)?,
max: bitstring_to_ip(max_bytes, &afi)?,
}))
}
})?;
IPAddressChoice::AddressOrRange(ranges)
}
_ => return Err(asn1::ParseError::new(asn1::ParseErrorKind::InvalidValue)),
}
};
ip_families.push(IPAddressFamily {
address_family: afi,
ip_address_choice,
});
Ok(())
})
})?;
Ok(IPAddrBlocks { ips: ip_families })
}).map_err(|_| ResourceCertError::ParseCert("Failed to parse IPAddrBlocks DER".into()))?;
Ok(ips)
}
fn parse_as_identifiers(ext: &X509Extension<'_>) -> Result<Vec<AsIdentifier>, ResourceCertError> {
let as_identifiers_der = ext.value;
// TODO: 解析 ASIdentifiers DER
}

3
src/data_model/resources/ip_resources.rs
View File

@ -1,7 +1,7 @@
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct IPAddrBlocks {
ips: Vec<IPAddressFamily>
pub ips: Vec<IPAddressFamily>
}
@ -44,3 +44,4 @@ pub struct IPAddressRange {
#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct IPAddress(u128);