mirror of
https://github.com/openssl/openssl.git
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302 lines
7.9 KiB
C
302 lines
7.9 KiB
C
/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include "internal/refcount.h"
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#include <openssl/asn1.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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#include "crypto/asn1.h"
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#include "crypto/x509.h"
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#include "x509_local.h"
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int X509_set_version(X509 *x, long version)
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{
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if (x == NULL)
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return 0;
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if (version == X509_get_version(x))
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return 1; /* avoid needless modification even re-allocation */
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if (version == X509_VERSION_1) {
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ASN1_INTEGER_free(x->cert_info.version);
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x->cert_info.version = NULL;
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x->cert_info.enc.modified = 1;
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return 1;
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}
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if (x->cert_info.version == NULL) {
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if ((x->cert_info.version = ASN1_INTEGER_new()) == NULL)
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return 0;
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}
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if (!ASN1_INTEGER_set(x->cert_info.version, version))
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return 0;
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x->cert_info.enc.modified = 1;
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return 1;
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}
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int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial)
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{
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ASN1_INTEGER *in;
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if (x == NULL)
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return 0;
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in = &x->cert_info.serialNumber;
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if (in != serial)
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return ASN1_STRING_copy(in, serial);
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x->cert_info.enc.modified = 1;
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return 1;
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}
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int X509_set_issuer_name(X509 *x, const X509_NAME *name)
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{
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if (x == NULL || !X509_NAME_set(&x->cert_info.issuer, name))
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return 0;
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x->cert_info.enc.modified = 1;
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return 1;
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}
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int X509_set_subject_name(X509 *x, const X509_NAME *name)
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{
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if (x == NULL || !X509_NAME_set(&x->cert_info.subject, name))
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return 0;
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x->cert_info.enc.modified = 1;
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return 1;
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}
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int ossl_x509_set1_time(int *modified, ASN1_TIME **ptm, const ASN1_TIME *tm)
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{
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ASN1_TIME *new;
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if (*ptm == tm)
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return 1;
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new = ASN1_STRING_dup(tm);
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if (tm != NULL && new == NULL)
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return 0;
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ASN1_TIME_free(*ptm);
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*ptm = new;
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if (modified != NULL)
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*modified = 1;
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return 1;
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}
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int X509_set1_notBefore(X509 *x, const ASN1_TIME *tm)
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{
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if (x == NULL || tm == NULL)
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return 0;
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return ossl_x509_set1_time(&x->cert_info.enc.modified,
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&x->cert_info.validity.notBefore, tm);
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}
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int X509_set1_notAfter(X509 *x, const ASN1_TIME *tm)
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{
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if (x == NULL || tm == NULL)
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return 0;
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return ossl_x509_set1_time(&x->cert_info.enc.modified,
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&x->cert_info.validity.notAfter, tm);
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}
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int X509_set_pubkey(X509 *x, EVP_PKEY *pkey)
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{
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if (x == NULL)
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return 0;
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if (!X509_PUBKEY_set(&(x->cert_info.key), pkey))
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return 0;
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x->cert_info.enc.modified = 1;
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return 1;
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}
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int X509_up_ref(X509 *x)
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{
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int i;
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if (CRYPTO_UP_REF(&x->references, &i) <= 0)
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return 0;
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REF_PRINT_COUNT("X509", x);
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REF_ASSERT_ISNT(i < 2);
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return i > 1;
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}
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long X509_get_version(const X509 *x)
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{
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return ASN1_INTEGER_get(x->cert_info.version);
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}
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const ASN1_TIME *X509_get0_notBefore(const X509 *x)
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{
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return x->cert_info.validity.notBefore;
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}
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const ASN1_TIME *X509_get0_notAfter(const X509 *x)
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{
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return x->cert_info.validity.notAfter;
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}
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ASN1_TIME *X509_getm_notBefore(const X509 *x)
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{
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return x->cert_info.validity.notBefore;
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}
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ASN1_TIME *X509_getm_notAfter(const X509 *x)
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{
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return x->cert_info.validity.notAfter;
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}
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int X509_get_signature_type(const X509 *x)
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{
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return EVP_PKEY_type(OBJ_obj2nid(x->sig_alg.algorithm));
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}
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X509_PUBKEY *X509_get_X509_PUBKEY(const X509 *x)
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{
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return x->cert_info.key;
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}
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const STACK_OF(X509_EXTENSION) *X509_get0_extensions(const X509 *x)
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{
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return x->cert_info.extensions;
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}
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void X509_get0_uids(const X509 *x, const ASN1_BIT_STRING **piuid,
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const ASN1_BIT_STRING **psuid)
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{
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if (piuid != NULL)
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*piuid = x->cert_info.issuerUID;
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if (psuid != NULL)
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*psuid = x->cert_info.subjectUID;
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}
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const X509_ALGOR *X509_get0_tbs_sigalg(const X509 *x)
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{
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return &x->cert_info.signature;
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}
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int X509_SIG_INFO_get(const X509_SIG_INFO *siginf, int *mdnid, int *pknid,
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int *secbits, uint32_t *flags)
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{
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if (mdnid != NULL)
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*mdnid = siginf->mdnid;
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if (pknid != NULL)
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*pknid = siginf->pknid;
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if (secbits != NULL)
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*secbits = siginf->secbits;
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if (flags != NULL)
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*flags = siginf->flags;
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return (siginf->flags & X509_SIG_INFO_VALID) != 0;
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}
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void X509_SIG_INFO_set(X509_SIG_INFO *siginf, int mdnid, int pknid,
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int secbits, uint32_t flags)
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{
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siginf->mdnid = mdnid;
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siginf->pknid = pknid;
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siginf->secbits = secbits;
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siginf->flags = flags;
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}
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int X509_get_signature_info(X509 *x, int *mdnid, int *pknid, int *secbits,
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uint32_t *flags)
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{
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X509_check_purpose(x, -1, -1);
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return X509_SIG_INFO_get(&x->siginf, mdnid, pknid, secbits, flags);
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}
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/* Modify *siginf according to alg and sig. Return 1 on success, else 0. */
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static int x509_sig_info_init(X509_SIG_INFO *siginf, const X509_ALGOR *alg,
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const ASN1_STRING *sig, const EVP_PKEY *pubkey)
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{
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int pknid, mdnid;
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const EVP_MD *md;
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const EVP_PKEY_ASN1_METHOD *ameth;
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siginf->mdnid = NID_undef;
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siginf->pknid = NID_undef;
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siginf->secbits = -1;
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siginf->flags = 0;
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if (!OBJ_find_sigid_algs(OBJ_obj2nid(alg->algorithm), &mdnid, &pknid)
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|| pknid == NID_undef) {
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ERR_raise(ERR_LIB_X509, X509_R_UNKNOWN_SIGID_ALGS);
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return 0;
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}
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siginf->mdnid = mdnid;
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siginf->pknid = pknid;
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switch (mdnid) {
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case NID_undef:
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/* If we have one, use a custom handler for this algorithm */
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ameth = EVP_PKEY_asn1_find(NULL, pknid);
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if (ameth != NULL && ameth->siginf_set != NULL
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&& ameth->siginf_set(siginf, alg, sig))
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break;
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if (pubkey != NULL) {
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int secbits;
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secbits = EVP_PKEY_get_security_bits(pubkey);
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if (secbits != 0) {
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siginf->secbits = secbits;
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break;
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}
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}
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ERR_raise(ERR_LIB_X509, X509_R_ERROR_USING_SIGINF_SET);
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return 0;
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/*
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* SHA1 and MD5 are known to be broken. Reduce security bits so that
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* they're no longer accepted at security level 1.
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* The real values don't really matter as long as they're lower than 80,
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* which is our security level 1.
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*/
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case NID_sha1:
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/*
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* https://eprint.iacr.org/2020/014 puts a chosen-prefix attack
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* for SHA1 at2^63.4
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*/
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siginf->secbits = 63;
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break;
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case NID_md5:
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/*
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* https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
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* puts a chosen-prefix attack for MD5 at 2^39.
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*/
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siginf->secbits = 39;
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break;
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case NID_id_GostR3411_94:
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/*
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* There is a collision attack on GOST R 34.11-94 at 2^105, see
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* https://link.springer.com/chapter/10.1007%2F978-3-540-85174-5_10
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*/
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siginf->secbits = 105;
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break;
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default:
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/* Security bits: half number of bits in digest */
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if ((md = EVP_get_digestbynid(mdnid)) == NULL) {
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ERR_raise(ERR_LIB_X509, X509_R_ERROR_GETTING_MD_BY_NID);
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return 0;
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}
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siginf->secbits = EVP_MD_get_size(md) * 4;
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break;
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}
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switch (mdnid) {
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case NID_sha1:
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case NID_sha256:
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case NID_sha384:
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case NID_sha512:
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siginf->flags |= X509_SIG_INFO_TLS;
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}
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siginf->flags |= X509_SIG_INFO_VALID;
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return 1;
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}
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/* Returns 1 on success, 0 on failure */
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int ossl_x509_init_sig_info(X509 *x)
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{
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return x509_sig_info_init(&x->siginf, &x->sig_alg, &x->signature,
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X509_PUBKEY_get0(x->cert_info.key));
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}
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