mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-07 03:46:41 +07:00
cf75446e69
Fix printk format warning in x509_cert_parser.c: crypto/asymmetric_keys/x509_cert_parser.c: In function 'x509_note_OID': crypto/asymmetric_keys/x509_cert_parser.c:113:3: warning: format '%zu' expects type 'size_t', but argument 2 has type 'long unsigned int' Builds cleanly on i386 and x86_64. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: David Howells <dhowells@redhat.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: linux-crypto@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
497 lines
12 KiB
C
497 lines
12 KiB
C
/* X.509 certificate parser
|
|
*
|
|
* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "X.509: "fmt
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/err.h>
|
|
#include <linux/oid_registry.h>
|
|
#include "public_key.h"
|
|
#include "x509_parser.h"
|
|
#include "x509-asn1.h"
|
|
#include "x509_rsakey-asn1.h"
|
|
|
|
struct x509_parse_context {
|
|
struct x509_certificate *cert; /* Certificate being constructed */
|
|
unsigned long data; /* Start of data */
|
|
const void *cert_start; /* Start of cert content */
|
|
const void *key; /* Key data */
|
|
size_t key_size; /* Size of key data */
|
|
enum OID last_oid; /* Last OID encountered */
|
|
enum OID algo_oid; /* Algorithm OID */
|
|
unsigned char nr_mpi; /* Number of MPIs stored */
|
|
u8 o_size; /* Size of organizationName (O) */
|
|
u8 cn_size; /* Size of commonName (CN) */
|
|
u8 email_size; /* Size of emailAddress */
|
|
u16 o_offset; /* Offset of organizationName (O) */
|
|
u16 cn_offset; /* Offset of commonName (CN) */
|
|
u16 email_offset; /* Offset of emailAddress */
|
|
};
|
|
|
|
/*
|
|
* Free an X.509 certificate
|
|
*/
|
|
void x509_free_certificate(struct x509_certificate *cert)
|
|
{
|
|
if (cert) {
|
|
public_key_destroy(cert->pub);
|
|
kfree(cert->issuer);
|
|
kfree(cert->subject);
|
|
kfree(cert->fingerprint);
|
|
kfree(cert->authority);
|
|
kfree(cert);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Parse an X.509 certificate
|
|
*/
|
|
struct x509_certificate *x509_cert_parse(const void *data, size_t datalen)
|
|
{
|
|
struct x509_certificate *cert;
|
|
struct x509_parse_context *ctx;
|
|
long ret;
|
|
|
|
ret = -ENOMEM;
|
|
cert = kzalloc(sizeof(struct x509_certificate), GFP_KERNEL);
|
|
if (!cert)
|
|
goto error_no_cert;
|
|
cert->pub = kzalloc(sizeof(struct public_key), GFP_KERNEL);
|
|
if (!cert->pub)
|
|
goto error_no_ctx;
|
|
ctx = kzalloc(sizeof(struct x509_parse_context), GFP_KERNEL);
|
|
if (!ctx)
|
|
goto error_no_ctx;
|
|
|
|
ctx->cert = cert;
|
|
ctx->data = (unsigned long)data;
|
|
|
|
/* Attempt to decode the certificate */
|
|
ret = asn1_ber_decoder(&x509_decoder, ctx, data, datalen);
|
|
if (ret < 0)
|
|
goto error_decode;
|
|
|
|
/* Decode the public key */
|
|
ret = asn1_ber_decoder(&x509_rsakey_decoder, ctx,
|
|
ctx->key, ctx->key_size);
|
|
if (ret < 0)
|
|
goto error_decode;
|
|
|
|
kfree(ctx);
|
|
return cert;
|
|
|
|
error_decode:
|
|
kfree(ctx);
|
|
error_no_ctx:
|
|
x509_free_certificate(cert);
|
|
error_no_cert:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
/*
|
|
* Note an OID when we find one for later processing when we know how
|
|
* to interpret it.
|
|
*/
|
|
int x509_note_OID(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
|
|
ctx->last_oid = look_up_OID(value, vlen);
|
|
if (ctx->last_oid == OID__NR) {
|
|
char buffer[50];
|
|
sprint_oid(value, vlen, buffer, sizeof(buffer));
|
|
pr_debug("Unknown OID: [%lu] %s\n",
|
|
(unsigned long)value - ctx->data, buffer);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Save the position of the TBS data so that we can check the signature over it
|
|
* later.
|
|
*/
|
|
int x509_note_tbs_certificate(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
|
|
pr_debug("x509_note_tbs_certificate(,%zu,%02x,%ld,%zu)!\n",
|
|
hdrlen, tag, (unsigned long)value - ctx->data, vlen);
|
|
|
|
ctx->cert->tbs = value - hdrlen;
|
|
ctx->cert->tbs_size = vlen + hdrlen;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Record the public key algorithm
|
|
*/
|
|
int x509_note_pkey_algo(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
|
|
pr_debug("PubKey Algo: %u\n", ctx->last_oid);
|
|
|
|
switch (ctx->last_oid) {
|
|
case OID_md2WithRSAEncryption:
|
|
case OID_md3WithRSAEncryption:
|
|
default:
|
|
return -ENOPKG; /* Unsupported combination */
|
|
|
|
case OID_md4WithRSAEncryption:
|
|
ctx->cert->sig_hash_algo = PKEY_HASH_MD5;
|
|
ctx->cert->sig_pkey_algo = PKEY_ALGO_RSA;
|
|
break;
|
|
|
|
case OID_sha1WithRSAEncryption:
|
|
ctx->cert->sig_hash_algo = PKEY_HASH_SHA1;
|
|
ctx->cert->sig_pkey_algo = PKEY_ALGO_RSA;
|
|
break;
|
|
|
|
case OID_sha256WithRSAEncryption:
|
|
ctx->cert->sig_hash_algo = PKEY_HASH_SHA256;
|
|
ctx->cert->sig_pkey_algo = PKEY_ALGO_RSA;
|
|
break;
|
|
|
|
case OID_sha384WithRSAEncryption:
|
|
ctx->cert->sig_hash_algo = PKEY_HASH_SHA384;
|
|
ctx->cert->sig_pkey_algo = PKEY_ALGO_RSA;
|
|
break;
|
|
|
|
case OID_sha512WithRSAEncryption:
|
|
ctx->cert->sig_hash_algo = PKEY_HASH_SHA512;
|
|
ctx->cert->sig_pkey_algo = PKEY_ALGO_RSA;
|
|
break;
|
|
|
|
case OID_sha224WithRSAEncryption:
|
|
ctx->cert->sig_hash_algo = PKEY_HASH_SHA224;
|
|
ctx->cert->sig_pkey_algo = PKEY_ALGO_RSA;
|
|
break;
|
|
}
|
|
|
|
ctx->algo_oid = ctx->last_oid;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Note the whereabouts and type of the signature.
|
|
*/
|
|
int x509_note_signature(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
|
|
pr_debug("Signature type: %u size %zu\n", ctx->last_oid, vlen);
|
|
|
|
if (ctx->last_oid != ctx->algo_oid) {
|
|
pr_warn("Got cert with pkey (%u) and sig (%u) algorithm OIDs\n",
|
|
ctx->algo_oid, ctx->last_oid);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ctx->cert->sig = value;
|
|
ctx->cert->sig_size = vlen;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Note some of the name segments from which we'll fabricate a name.
|
|
*/
|
|
int x509_extract_name_segment(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
|
|
switch (ctx->last_oid) {
|
|
case OID_commonName:
|
|
ctx->cn_size = vlen;
|
|
ctx->cn_offset = (unsigned long)value - ctx->data;
|
|
break;
|
|
case OID_organizationName:
|
|
ctx->o_size = vlen;
|
|
ctx->o_offset = (unsigned long)value - ctx->data;
|
|
break;
|
|
case OID_email_address:
|
|
ctx->email_size = vlen;
|
|
ctx->email_offset = (unsigned long)value - ctx->data;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Fabricate and save the issuer and subject names
|
|
*/
|
|
static int x509_fabricate_name(struct x509_parse_context *ctx, size_t hdrlen,
|
|
unsigned char tag,
|
|
char **_name, size_t vlen)
|
|
{
|
|
const void *name, *data = (const void *)ctx->data;
|
|
size_t namesize;
|
|
char *buffer;
|
|
|
|
if (*_name)
|
|
return -EINVAL;
|
|
|
|
/* Empty name string if no material */
|
|
if (!ctx->cn_size && !ctx->o_size && !ctx->email_size) {
|
|
buffer = kmalloc(1, GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
buffer[0] = 0;
|
|
goto done;
|
|
}
|
|
|
|
if (ctx->cn_size && ctx->o_size) {
|
|
/* Consider combining O and CN, but use only the CN if it is
|
|
* prefixed by the O, or a significant portion thereof.
|
|
*/
|
|
namesize = ctx->cn_size;
|
|
name = data + ctx->cn_offset;
|
|
if (ctx->cn_size >= ctx->o_size &&
|
|
memcmp(data + ctx->cn_offset, data + ctx->o_offset,
|
|
ctx->o_size) == 0)
|
|
goto single_component;
|
|
if (ctx->cn_size >= 7 &&
|
|
ctx->o_size >= 7 &&
|
|
memcmp(data + ctx->cn_offset, data + ctx->o_offset, 7) == 0)
|
|
goto single_component;
|
|
|
|
buffer = kmalloc(ctx->o_size + 2 + ctx->cn_size + 1,
|
|
GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
memcpy(buffer,
|
|
data + ctx->o_offset, ctx->o_size);
|
|
buffer[ctx->o_size + 0] = ':';
|
|
buffer[ctx->o_size + 1] = ' ';
|
|
memcpy(buffer + ctx->o_size + 2,
|
|
data + ctx->cn_offset, ctx->cn_size);
|
|
buffer[ctx->o_size + 2 + ctx->cn_size] = 0;
|
|
goto done;
|
|
|
|
} else if (ctx->cn_size) {
|
|
namesize = ctx->cn_size;
|
|
name = data + ctx->cn_offset;
|
|
} else if (ctx->o_size) {
|
|
namesize = ctx->o_size;
|
|
name = data + ctx->o_offset;
|
|
} else {
|
|
namesize = ctx->email_size;
|
|
name = data + ctx->email_offset;
|
|
}
|
|
|
|
single_component:
|
|
buffer = kmalloc(namesize + 1, GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
memcpy(buffer, name, namesize);
|
|
buffer[namesize] = 0;
|
|
|
|
done:
|
|
*_name = buffer;
|
|
ctx->cn_size = 0;
|
|
ctx->o_size = 0;
|
|
ctx->email_size = 0;
|
|
return 0;
|
|
}
|
|
|
|
int x509_note_issuer(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->issuer, vlen);
|
|
}
|
|
|
|
int x509_note_subject(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->subject, vlen);
|
|
}
|
|
|
|
/*
|
|
* Extract the data for the public key algorithm
|
|
*/
|
|
int x509_extract_key_data(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
|
|
if (ctx->last_oid != OID_rsaEncryption)
|
|
return -ENOPKG;
|
|
|
|
/* There seems to be an extraneous 0 byte on the front of the data */
|
|
ctx->cert->pkey_algo = PKEY_ALGO_RSA;
|
|
ctx->key = value + 1;
|
|
ctx->key_size = vlen - 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Extract a RSA public key value
|
|
*/
|
|
int rsa_extract_mpi(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
MPI mpi;
|
|
|
|
if (ctx->nr_mpi >= ARRAY_SIZE(ctx->cert->pub->mpi)) {
|
|
pr_err("Too many public key MPIs in certificate\n");
|
|
return -EBADMSG;
|
|
}
|
|
|
|
mpi = mpi_read_raw_data(value, vlen);
|
|
if (!mpi)
|
|
return -ENOMEM;
|
|
|
|
ctx->cert->pub->mpi[ctx->nr_mpi++] = mpi;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Process certificate extensions that are used to qualify the certificate.
|
|
*/
|
|
int x509_process_extension(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
const unsigned char *v = value;
|
|
char *f;
|
|
int i;
|
|
|
|
pr_debug("Extension: %u\n", ctx->last_oid);
|
|
|
|
if (ctx->last_oid == OID_subjectKeyIdentifier) {
|
|
/* Get hold of the key fingerprint */
|
|
if (vlen < 3)
|
|
return -EBADMSG;
|
|
if (v[0] != ASN1_OTS || v[1] != vlen - 2)
|
|
return -EBADMSG;
|
|
v += 2;
|
|
vlen -= 2;
|
|
|
|
f = kmalloc(vlen * 2 + 1, GFP_KERNEL);
|
|
if (!f)
|
|
return -ENOMEM;
|
|
for (i = 0; i < vlen; i++)
|
|
sprintf(f + i * 2, "%02x", v[i]);
|
|
pr_debug("fingerprint %s\n", f);
|
|
ctx->cert->fingerprint = f;
|
|
return 0;
|
|
}
|
|
|
|
if (ctx->last_oid == OID_authorityKeyIdentifier) {
|
|
/* Get hold of the CA key fingerprint */
|
|
if (vlen < 5)
|
|
return -EBADMSG;
|
|
if (v[0] != (ASN1_SEQ | (ASN1_CONS << 5)) ||
|
|
v[1] != vlen - 2 ||
|
|
v[2] != (ASN1_CONT << 6) ||
|
|
v[3] != vlen - 4)
|
|
return -EBADMSG;
|
|
v += 4;
|
|
vlen -= 4;
|
|
|
|
f = kmalloc(vlen * 2 + 1, GFP_KERNEL);
|
|
if (!f)
|
|
return -ENOMEM;
|
|
for (i = 0; i < vlen; i++)
|
|
sprintf(f + i * 2, "%02x", v[i]);
|
|
pr_debug("authority %s\n", f);
|
|
ctx->cert->authority = f;
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Record a certificate time.
|
|
*/
|
|
static int x509_note_time(struct tm *tm, size_t hdrlen,
|
|
unsigned char tag,
|
|
const unsigned char *value, size_t vlen)
|
|
{
|
|
const unsigned char *p = value;
|
|
|
|
#define dec2bin(X) ((X) - '0')
|
|
#define DD2bin(P) ({ unsigned x = dec2bin(P[0]) * 10 + dec2bin(P[1]); P += 2; x; })
|
|
|
|
if (tag == ASN1_UNITIM) {
|
|
/* UTCTime: YYMMDDHHMMSSZ */
|
|
if (vlen != 13)
|
|
goto unsupported_time;
|
|
tm->tm_year = DD2bin(p);
|
|
if (tm->tm_year >= 50)
|
|
tm->tm_year += 1900;
|
|
else
|
|
tm->tm_year += 2000;
|
|
} else if (tag == ASN1_GENTIM) {
|
|
/* GenTime: YYYYMMDDHHMMSSZ */
|
|
if (vlen != 15)
|
|
goto unsupported_time;
|
|
tm->tm_year = DD2bin(p) * 100 + DD2bin(p);
|
|
} else {
|
|
goto unsupported_time;
|
|
}
|
|
|
|
tm->tm_year -= 1900;
|
|
tm->tm_mon = DD2bin(p) - 1;
|
|
tm->tm_mday = DD2bin(p);
|
|
tm->tm_hour = DD2bin(p);
|
|
tm->tm_min = DD2bin(p);
|
|
tm->tm_sec = DD2bin(p);
|
|
|
|
if (*p != 'Z')
|
|
goto unsupported_time;
|
|
|
|
return 0;
|
|
|
|
unsupported_time:
|
|
pr_debug("Got unsupported time [tag %02x]: '%*.*s'\n",
|
|
tag, (int)vlen, (int)vlen, value);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
int x509_note_not_before(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
return x509_note_time(&ctx->cert->valid_from, hdrlen, tag, value, vlen);
|
|
}
|
|
|
|
int x509_note_not_after(void *context, size_t hdrlen,
|
|
unsigned char tag,
|
|
const void *value, size_t vlen)
|
|
{
|
|
struct x509_parse_context *ctx = context;
|
|
return x509_note_time(&ctx->cert->valid_to, hdrlen, tag, value, vlen);
|
|
}
|