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X.509: Make algo identifiers text instead of enum

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Make the identifier public key and digest algorithm fields text instead of
enum.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
David Howells 2016-03-03 21:49:27 +00:00
parent d43de6c780
commit 4e8ae72a75
12 changed files with 61 additions and 97 deletions
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14
crypto/asymmetric_keys/mscode_parser.c
View file

@ -86,25 +86,25 @@ int mscode_note_digest_algo(void *context, size_t hdrlen,
oid = look_up_OID(value, vlen);
switch (oid) {
case OID_md4:
ctx->digest_algo = HASH_ALGO_MD4;
ctx->digest_algo = "md4";
break;
case OID_md5:
ctx->digest_algo = HASH_ALGO_MD5;
ctx->digest_algo = "md5";
break;
case OID_sha1:
ctx->digest_algo = HASH_ALGO_SHA1;
ctx->digest_algo = "sha1";
break;
case OID_sha256:
ctx->digest_algo = HASH_ALGO_SHA256;
ctx->digest_algo = "sha256";
break;
case OID_sha384:
ctx->digest_algo = HASH_ALGO_SHA384;
ctx->digest_algo = "sha384";
break;
case OID_sha512:
ctx->digest_algo = HASH_ALGO_SHA512;
ctx->digest_algo = "sha512";
break;
case OID_sha224:
ctx->digest_algo = HASH_ALGO_SHA224;
ctx->digest_algo = "sha224";
break;
case OID__NR:

18
crypto/asymmetric_keys/pkcs7_parser.c
View file

@ -218,25 +218,25 @@ int pkcs7_sig_note_digest_algo(void *context, size_t hdrlen,
switch (ctx->last_oid) {
case OID_md4:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_MD4;
ctx->sinfo->sig.hash_algo = "md4";
break;
case OID_md5:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_MD5;
ctx->sinfo->sig.hash_algo = "md5";
break;
case OID_sha1:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA1;
ctx->sinfo->sig.hash_algo = "sha1";
break;
case OID_sha256:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA256;
ctx->sinfo->sig.hash_algo = "sha256";
break;
case OID_sha384:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA384;
ctx->sinfo->sig.hash_algo = "sha384";
break;
case OID_sha512:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA512;
ctx->sinfo->sig.hash_algo = "sha512";
break;
case OID_sha224:
ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA224;
ctx->sinfo->sig.hash_algo = "sha224";
default:
printk("Unsupported digest algo: %u\n", ctx->last_oid);
return -ENOPKG;
@ -255,7 +255,7 @@ int pkcs7_sig_note_pkey_algo(void *context, size_t hdrlen,
switch (ctx->last_oid) {
case OID_rsaEncryption:
ctx->sinfo->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->sinfo->sig.pkey_algo = "rsa";
break;
default:
printk("Unsupported pkey algo: %u\n", ctx->last_oid);
@ -615,8 +615,6 @@ int pkcs7_sig_note_signature(void *context, size_t hdrlen,
{
struct pkcs7_parse_context *ctx = context;
BUG_ON(ctx->sinfo->sig.pkey_algo != PKEY_ALGO_RSA);
ctx->sinfo->sig.s = kmemdup(value, vlen, GFP_KERNEL);
if (!ctx->sinfo->sig.s)
return -ENOMEM;

8
crypto/asymmetric_keys/pkcs7_verify.c
View file

@ -31,17 +31,15 @@ static int pkcs7_digest(struct pkcs7_message *pkcs7,
void *digest;
int ret;
kenter(",%u,%u", sinfo->index, sinfo->sig.pkey_hash_algo);
kenter(",%u,%s", sinfo->index, sinfo->sig.hash_algo);
if (sinfo->sig.pkey_hash_algo >= PKEY_HASH__LAST ||
!hash_algo_name[sinfo->sig.pkey_hash_algo])
if (!sinfo->sig.hash_algo)
return -ENOPKG;
/* Allocate the hashing algorithm we're going to need and find out how
* big the hash operational data will be.
*/
tfm = crypto_alloc_shash(hash_algo_name[sinfo->sig.pkey_hash_algo],
0, 0);
tfm = crypto_alloc_shash(sinfo->sig.hash_algo, 0, 0);
if (IS_ERR(tfm))
return (PTR_ERR(tfm) == -ENOENT) ? -ENOPKG : PTR_ERR(tfm);

24
crypto/asymmetric_keys/public_key.c
View file

@ -24,19 +24,6 @@
MODULE_LICENSE("GPL");
const char *const pkey_algo_name[PKEY_ALGO__LAST] = {
[PKEY_ALGO_DSA] = "dsa",
[PKEY_ALGO_RSA] = "rsa",
};
EXPORT_SYMBOL_GPL(pkey_algo_name);
const char *const pkey_id_type_name[PKEY_ID_TYPE__LAST] = {
[PKEY_ID_PGP] = "PGP",
[PKEY_ID_X509] = "X509",
[PKEY_ID_PKCS7] = "PKCS#7",
};
EXPORT_SYMBOL_GPL(pkey_id_type_name);
/*
* Provide a part of a description of the key for /proc/keys.
*/
@ -46,9 +33,7 @@ static void public_key_describe(const struct key *asymmetric_key,
struct public_key *key = asymmetric_key->payload.data[asym_crypto];
if (key)
seq_printf(m, "%s.%s",
pkey_id_type_name[key->id_type],
pkey_algo_name[key->pkey_algo]);
seq_printf(m, "%s.%s", key->id_type, key->pkey_algo);
}
/*
@ -103,15 +88,14 @@ int public_key_verify_signature(const struct public_key *pkey,
BUG_ON(!sig->digest);
BUG_ON(!sig->s);
alg_name = pkey_algo_name[sig->pkey_algo];
if (sig->pkey_algo == PKEY_ALGO_RSA) {
alg_name = sig->pkey_algo;
if (strcmp(sig->pkey_algo, "rsa") == 0) {
/* The data wangled by the RSA algorithm is typically padded
* and encoded in some manner, such as EMSA-PKCS1-1_5 [RFC3447
* sec 8.2].
*/
if (snprintf(alg_name_buf, CRYPTO_MAX_ALG_NAME,
"pkcs1pad(rsa,%s)",
hash_algo_name[sig->pkey_hash_algo]
"pkcs1pad(rsa,%s)", sig->hash_algo
) >= CRYPTO_MAX_ALG_NAME)
return -EINVAL;
alg_name = alg_name_buf;

4
crypto/asymmetric_keys/verify_pefile.c
View file

@ -328,12 +328,12 @@ static int pefile_digest_pe(const void *pebuf, unsigned int pelen,
void *digest;
int ret;
kenter(",%u", ctx->digest_algo);
kenter(",%s", ctx->digest_algo);
/* Allocate the hashing algorithm we're going to need and find out how
* big the hash operational data will be.
*/
tfm = crypto_alloc_shash(hash_algo_name[ctx->digest_algo], 0, 0);
tfm = crypto_alloc_shash(ctx->digest_algo, 0, 0);
if (IS_ERR(tfm))
return (PTR_ERR(tfm) == -ENOENT) ? -ENOPKG : PTR_ERR(tfm);

2
crypto/asymmetric_keys/verify_pefile.h
View file

@ -28,7 +28,7 @@ struct pefile_context {
/* PKCS#7 MS Individual Code Signing content */
const void *digest; /* Digest */
unsigned digest_len; /* Digest length */
enum hash_algo digest_algo; /* Digest algorithm */
const char *digest_algo; /* Digest algorithm */
};
#define kenter(FMT, ...) \

26
crypto/asymmetric_keys/x509_cert_parser.c
View file

@ -188,33 +188,33 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
return -ENOPKG; /* Unsupported combination */
case OID_md4WithRSAEncryption:
ctx->cert->sig.pkey_hash_algo = HASH_ALGO_MD5;
ctx->cert->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->cert->sig.hash_algo = "md4";
ctx->cert->sig.pkey_algo = "rsa";
break;
case OID_sha1WithRSAEncryption:
ctx->cert->sig.pkey_hash_algo = HASH_ALGO_SHA1;
ctx->cert->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->cert->sig.hash_algo = "sha1";
ctx->cert->sig.pkey_algo = "rsa";
break;
case OID_sha256WithRSAEncryption:
ctx->cert->sig.pkey_hash_algo = HASH_ALGO_SHA256;
ctx->cert->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->cert->sig.hash_algo = "sha256";
ctx->cert->sig.pkey_algo = "rsa";
break;
case OID_sha384WithRSAEncryption:
ctx->cert->sig.pkey_hash_algo = HASH_ALGO_SHA384;
ctx->cert->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->cert->sig.hash_algo = "sha384";
ctx->cert->sig.pkey_algo = "rsa";
break;
case OID_sha512WithRSAEncryption:
ctx->cert->sig.pkey_hash_algo = HASH_ALGO_SHA512;
ctx->cert->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->cert->sig.hash_algo = "sha512";
ctx->cert->sig.pkey_algo = "rsa";
break;
case OID_sha224WithRSAEncryption:
ctx->cert->sig.pkey_hash_algo = HASH_ALGO_SHA224;
ctx->cert->sig.pkey_algo = PKEY_ALGO_RSA;
ctx->cert->sig.hash_algo = "sha224";
ctx->cert->sig.pkey_algo = "rsa";
break;
}
@ -396,7 +396,7 @@ int x509_extract_key_data(void *context, size_t hdrlen,
if (ctx->last_oid != OID_rsaEncryption)
return -ENOPKG;
ctx->cert->pub->pkey_algo = PKEY_ALGO_RSA;
ctx->cert->pub->pkey_algo = "rsa";
/* Discard the BIT STRING metadata */
ctx->key = value + 1;

17
crypto/asymmetric_keys/x509_public_key.c
View file

@ -176,7 +176,7 @@ int x509_get_sig_params(struct x509_certificate *cert)
/* Allocate the hashing algorithm we're going to need and find out how
* big the hash operational data will be.
*/
tfm = crypto_alloc_shash(hash_algo_name[cert->sig.pkey_hash_algo], 0, 0);
tfm = crypto_alloc_shash(cert->sig.hash_algo, 0, 0);
if (IS_ERR(tfm)) {
if (PTR_ERR(tfm) == -ENOENT) {
cert->unsupported_crypto = true;
@ -291,21 +291,20 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
pr_devel("Cert Issuer: %s\n", cert->issuer);
pr_devel("Cert Subject: %s\n", cert->subject);
if (cert->pub->pkey_algo >= PKEY_ALGO__LAST ||
cert->sig.pkey_algo >= PKEY_ALGO__LAST ||
cert->sig.pkey_hash_algo >= PKEY_HASH__LAST ||
!hash_algo_name[cert->sig.pkey_hash_algo]) {
if (!cert->pub->pkey_algo ||
!cert->sig.pkey_algo ||
!cert->sig.hash_algo) {
ret = -ENOPKG;
goto error_free_cert;
}
pr_devel("Cert Key Algo: %s\n", pkey_algo_name[cert->pub->pkey_algo]);
pr_devel("Cert Key Algo: %s\n", cert->pub->pkey_algo);
pr_devel("Cert Valid period: %lld-%lld\n", cert->valid_from, cert->valid_to);
pr_devel("Cert Signature: %s + %s\n",
pkey_algo_name[cert->sig.pkey_algo],
hash_algo_name[cert->sig.pkey_hash_algo]);
cert->sig.pkey_algo,
cert->sig.hash_algo);
cert->pub->id_type = PKEY_ID_X509;
cert->pub->id_type = "X509";
/* Check the signature on the key if it appears to be self-signed */
if ((!cert->akid_skid && !cert->akid_id) ||

30
include/crypto/public_key.h
View file

@ -14,28 +14,6 @@
#ifndef _LINUX_PUBLIC_KEY_H
#define _LINUX_PUBLIC_KEY_H
#include <crypto/hash_info.h>
enum pkey_algo {
PKEY_ALGO_DSA,
PKEY_ALGO_RSA,
PKEY_ALGO__LAST
};
extern const char *const pkey_algo_name[PKEY_ALGO__LAST];
/* asymmetric key implementation supports only up to SHA224 */
#define PKEY_HASH__LAST (HASH_ALGO_SHA224 + 1)
enum pkey_id_type {
PKEY_ID_PGP, /* OpenPGP generated key ID */
PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */
PKEY_ID_PKCS7, /* Signature in PKCS#7 message */
PKEY_ID_TYPE__LAST
};
extern const char *const pkey_id_type_name[PKEY_ID_TYPE__LAST];
/*
* The use to which an asymmetric key is being put.
*/
@ -59,8 +37,8 @@ extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
struct public_key {
void *key;
u32 keylen;
enum pkey_algo pkey_algo : 8;
enum pkey_id_type id_type : 8;
const char *id_type;
const char *pkey_algo;
};
extern void public_key_destroy(void *payload);
@ -73,8 +51,8 @@ struct public_key_signature {
u32 s_size; /* Number of bytes in signature */
u8 *digest;
u8 digest_size; /* Number of bytes in digest */
enum pkey_algo pkey_algo : 8;
enum hash_algo pkey_hash_algo : 8;
const char *pkey_algo;
const char *hash_algo;
};
extern struct asymmetric_key_subtype public_key_subtype;

6
kernel/module_signing.c
View file

@ -16,6 +16,12 @@
#include <crypto/public_key.h>
#include "module-internal.h"
enum pkey_id_type {
PKEY_ID_PGP, /* OpenPGP generated key ID */
PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */
PKEY_ID_PKCS7, /* Signature in PKCS#7 message */
};
/*
* Module signature information block.
*

7
security/integrity/digsig_asymmetric.c
View file

@ -16,6 +16,7 @@
#include <linux/ratelimit.h>
#include <linux/key-type.h>
#include <crypto/public_key.h>
#include <crypto/hash_info.h>
#include <keys/asymmetric-type.h>
#include <keys/system_keyring.h>
@ -94,7 +95,7 @@ int asymmetric_verify(struct key *keyring, const char *sig,
if (siglen != __be16_to_cpu(hdr->sig_size))
return -EBADMSG;
if (hdr->hash_algo >= PKEY_HASH__LAST)
if (hdr->hash_algo >= HASH_ALGO__LAST)
return -ENOPKG;
key = request_asymmetric_key(keyring, __be32_to_cpu(hdr->keyid));
@ -103,8 +104,8 @@ int asymmetric_verify(struct key *keyring, const char *sig,
memset(&pks, 0, sizeof(pks));
pks.pkey_algo = PKEY_ALGO_RSA;
pks.pkey_hash_algo = hdr->hash_algo;
pks.pkey_algo = "rsa";
pks.hash_algo = hash_algo_name[hdr->hash_algo];
pks.digest = (u8 *)data;
pks.digest_size = datalen;
pks.s = hdr->sig;

2
security/integrity/integrity.h
View file

@ -94,7 +94,7 @@ struct ima_digest_data {
struct signature_v2_hdr {
uint8_t type; /* xattr type */
uint8_t version; /* signature format version */
uint8_t hash_algo; /* Digest algorithm [enum pkey_hash_algo] */
uint8_t hash_algo; /* Digest algorithm [enum hash_algo] */
uint32_t keyid; /* IMA key identifier - not X509/PGP specific */
uint16_t sig_size; /* signature size */
uint8_t sig[0]; /* signature payload */