summaryrefslogtreecommitdiffstats
path: root/crypto/asymmetric_keys
diff options
context:
space:
mode:
Diffstat (limited to 'crypto/asymmetric_keys')
-rw-r--r--crypto/asymmetric_keys/asym_tpm.c102
-rw-r--r--crypto/asymmetric_keys/pkcs7_verify.c33
-rw-r--r--crypto/asymmetric_keys/public_key.c1
-rw-r--r--crypto/asymmetric_keys/verify_pefile.c4
4 files changed, 80 insertions, 60 deletions
diff --git a/crypto/asymmetric_keys/asym_tpm.c b/crypto/asymmetric_keys/asym_tpm.c
index 76d2ce3a1b5b..378b18b9bc34 100644
--- a/crypto/asymmetric_keys/asym_tpm.c
+++ b/crypto/asymmetric_keys/asym_tpm.c
@@ -13,7 +13,7 @@
#include <crypto/sha.h>
#include <asm/unaligned.h>
#include <keys/asymmetric-subtype.h>
-#include <keys/trusted.h>
+#include <keys/trusted_tpm.h>
#include <crypto/asym_tpm_subtype.h>
#include <crypto/public_key.h>
@@ -21,10 +21,6 @@
#define TPM_ORD_LOADKEY2 65
#define TPM_ORD_UNBIND 30
#define TPM_ORD_SIGN 60
-#define TPM_LOADKEY2_SIZE 59
-#define TPM_FLUSHSPECIFIC_SIZE 18
-#define TPM_UNBIND_SIZE 63
-#define TPM_SIGN_SIZE 63
#define TPM_RT_KEY 0x00000001
@@ -68,16 +64,13 @@ static int tpm_loadkey2(struct tpm_buf *tb,
return ret;
/* build the request buffer */
- INIT_BUF(tb);
- store16(tb, TPM_TAG_RQU_AUTH1_COMMAND);
- store32(tb, TPM_LOADKEY2_SIZE + keybloblen);
- store32(tb, TPM_ORD_LOADKEY2);
- store32(tb, keyhandle);
- storebytes(tb, keyblob, keybloblen);
- store32(tb, authhandle);
- storebytes(tb, nonceodd, TPM_NONCE_SIZE);
- store8(tb, cont);
- storebytes(tb, authdata, SHA1_DIGEST_SIZE);
+ tpm_buf_reset(tb, TPM_TAG_RQU_AUTH1_COMMAND, TPM_ORD_LOADKEY2);
+ tpm_buf_append_u32(tb, keyhandle);
+ tpm_buf_append(tb, keyblob, keybloblen);
+ tpm_buf_append_u32(tb, authhandle);
+ tpm_buf_append(tb, nonceodd, TPM_NONCE_SIZE);
+ tpm_buf_append_u8(tb, cont);
+ tpm_buf_append(tb, authdata, SHA1_DIGEST_SIZE);
ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE);
if (ret < 0) {
@@ -101,12 +94,9 @@ static int tpm_loadkey2(struct tpm_buf *tb,
*/
static int tpm_flushspecific(struct tpm_buf *tb, uint32_t handle)
{
- INIT_BUF(tb);
- store16(tb, TPM_TAG_RQU_COMMAND);
- store32(tb, TPM_FLUSHSPECIFIC_SIZE);
- store32(tb, TPM_ORD_FLUSHSPECIFIC);
- store32(tb, handle);
- store32(tb, TPM_RT_KEY);
+ tpm_buf_reset(tb, TPM_TAG_RQU_COMMAND, TPM_ORD_FLUSHSPECIFIC);
+ tpm_buf_append_u32(tb, handle);
+ tpm_buf_append_u32(tb, TPM_RT_KEY);
return trusted_tpm_send(tb->data, MAX_BUF_SIZE);
}
@@ -155,17 +145,14 @@ static int tpm_unbind(struct tpm_buf *tb,
return ret;
/* build the request buffer */
- INIT_BUF(tb);
- store16(tb, TPM_TAG_RQU_AUTH1_COMMAND);
- store32(tb, TPM_UNBIND_SIZE + bloblen);
- store32(tb, TPM_ORD_UNBIND);
- store32(tb, keyhandle);
- store32(tb, bloblen);
- storebytes(tb, blob, bloblen);
- store32(tb, authhandle);
- storebytes(tb, nonceodd, TPM_NONCE_SIZE);
- store8(tb, cont);
- storebytes(tb, authdata, SHA1_DIGEST_SIZE);
+ tpm_buf_reset(tb, TPM_TAG_RQU_AUTH1_COMMAND, TPM_ORD_UNBIND);
+ tpm_buf_append_u32(tb, keyhandle);
+ tpm_buf_append_u32(tb, bloblen);
+ tpm_buf_append(tb, blob, bloblen);
+ tpm_buf_append_u32(tb, authhandle);
+ tpm_buf_append(tb, nonceodd, TPM_NONCE_SIZE);
+ tpm_buf_append_u8(tb, cont);
+ tpm_buf_append(tb, authdata, SHA1_DIGEST_SIZE);
ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE);
if (ret < 0) {
@@ -241,17 +228,14 @@ static int tpm_sign(struct tpm_buf *tb,
return ret;
/* build the request buffer */
- INIT_BUF(tb);
- store16(tb, TPM_TAG_RQU_AUTH1_COMMAND);
- store32(tb, TPM_SIGN_SIZE + bloblen);
- store32(tb, TPM_ORD_SIGN);
- store32(tb, keyhandle);
- store32(tb, bloblen);
- storebytes(tb, blob, bloblen);
- store32(tb, authhandle);
- storebytes(tb, nonceodd, TPM_NONCE_SIZE);
- store8(tb, cont);
- storebytes(tb, authdata, SHA1_DIGEST_SIZE);
+ tpm_buf_reset(tb, TPM_TAG_RQU_AUTH1_COMMAND, TPM_ORD_SIGN);
+ tpm_buf_append_u32(tb, keyhandle);
+ tpm_buf_append_u32(tb, bloblen);
+ tpm_buf_append(tb, blob, bloblen);
+ tpm_buf_append_u32(tb, authhandle);
+ tpm_buf_append(tb, nonceodd, TPM_NONCE_SIZE);
+ tpm_buf_append_u8(tb, cont);
+ tpm_buf_append(tb, authdata, SHA1_DIGEST_SIZE);
ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE);
if (ret < 0) {
@@ -486,6 +470,7 @@ static int tpm_key_encrypt(struct tpm_key *tk,
if (ret < 0)
goto error_free_tfm;
+ ret = -ENOMEM;
req = akcipher_request_alloc(tfm, GFP_KERNEL);
if (!req)
goto error_free_tfm;
@@ -519,7 +504,7 @@ static int tpm_key_decrypt(struct tpm_key *tk,
struct kernel_pkey_params *params,
const void *in, void *out)
{
- struct tpm_buf *tb;
+ struct tpm_buf tb;
uint32_t keyhandle;
uint8_t srkauth[SHA1_DIGEST_SIZE];
uint8_t keyauth[SHA1_DIGEST_SIZE];
@@ -533,14 +518,14 @@ static int tpm_key_decrypt(struct tpm_key *tk,
if (strcmp(params->encoding, "pkcs1"))
return -ENOPKG;
- tb = kzalloc(sizeof(*tb), GFP_KERNEL);
- if (!tb)
- return -ENOMEM;
+ r = tpm_buf_init(&tb, 0, 0);
+ if (r)
+ return r;
/* TODO: Handle a non-all zero SRK authorization */
memset(srkauth, 0, sizeof(srkauth));
- r = tpm_loadkey2(tb, SRKHANDLE, srkauth,
+ r = tpm_loadkey2(&tb, SRKHANDLE, srkauth,
tk->blob, tk->blob_len, &keyhandle);
if (r < 0) {
pr_devel("loadkey2 failed (%d)\n", r);
@@ -550,16 +535,16 @@ static int tpm_key_decrypt(struct tpm_key *tk,
/* TODO: Handle a non-all zero key authorization */
memset(keyauth, 0, sizeof(keyauth));
- r = tpm_unbind(tb, keyhandle, keyauth,
+ r = tpm_unbind(&tb, keyhandle, keyauth,
in, params->in_len, out, params->out_len);
if (r < 0)
pr_devel("tpm_unbind failed (%d)\n", r);
- if (tpm_flushspecific(tb, keyhandle) < 0)
+ if (tpm_flushspecific(&tb, keyhandle) < 0)
pr_devel("flushspecific failed (%d)\n", r);
error:
- kzfree(tb);
+ tpm_buf_destroy(&tb);
pr_devel("<==%s() = %d\n", __func__, r);
return r;
}
@@ -643,7 +628,7 @@ static int tpm_key_sign(struct tpm_key *tk,
struct kernel_pkey_params *params,
const void *in, void *out)
{
- struct tpm_buf *tb;
+ struct tpm_buf tb;
uint32_t keyhandle;
uint8_t srkauth[SHA1_DIGEST_SIZE];
uint8_t keyauth[SHA1_DIGEST_SIZE];
@@ -681,15 +666,14 @@ static int tpm_key_sign(struct tpm_key *tk,
goto error_free_asn1_wrapped;
}
- r = -ENOMEM;
- tb = kzalloc(sizeof(*tb), GFP_KERNEL);
- if (!tb)
+ r = tpm_buf_init(&tb, 0, 0);
+ if (r)
goto error_free_asn1_wrapped;
/* TODO: Handle a non-all zero SRK authorization */
memset(srkauth, 0, sizeof(srkauth));
- r = tpm_loadkey2(tb, SRKHANDLE, srkauth,
+ r = tpm_loadkey2(&tb, SRKHANDLE, srkauth,
tk->blob, tk->blob_len, &keyhandle);
if (r < 0) {
pr_devel("loadkey2 failed (%d)\n", r);
@@ -699,15 +683,15 @@ static int tpm_key_sign(struct tpm_key *tk,
/* TODO: Handle a non-all zero key authorization */
memset(keyauth, 0, sizeof(keyauth));
- r = tpm_sign(tb, keyhandle, keyauth, in, in_len, out, params->out_len);
+ r = tpm_sign(&tb, keyhandle, keyauth, in, in_len, out, params->out_len);
if (r < 0)
pr_devel("tpm_sign failed (%d)\n", r);
- if (tpm_flushspecific(tb, keyhandle) < 0)
+ if (tpm_flushspecific(&tb, keyhandle) < 0)
pr_devel("flushspecific failed (%d)\n", r);
error_free_tb:
- kzfree(tb);
+ tpm_buf_destroy(&tb);
error_free_asn1_wrapped:
kfree(asn1_wrapped);
pr_devel("<==%s() = %d\n", __func__, r);
diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
index 11bee67fa9cc..ce49820caa97 100644
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -12,6 +12,7 @@
#include <linux/err.h>
#include <linux/asn1.h>
#include <crypto/hash.h>
+#include <crypto/hash_info.h>
#include <crypto/public_key.h>
#include "pkcs7_parser.h"
@@ -29,6 +30,10 @@ static int pkcs7_digest(struct pkcs7_message *pkcs7,
kenter(",%u,%s", sinfo->index, sinfo->sig->hash_algo);
+ /* The digest was calculated already. */
+ if (sig->digest)
+ return 0;
+
if (!sinfo->sig->hash_algo)
return -ENOPKG;
@@ -117,6 +122,34 @@ error_no_desc:
return ret;
}
+int pkcs7_get_digest(struct pkcs7_message *pkcs7, const u8 **buf, u32 *len,
+ enum hash_algo *hash_algo)
+{
+ struct pkcs7_signed_info *sinfo = pkcs7->signed_infos;
+ int i, ret;
+
+ /*
+ * This function doesn't support messages with more than one signature.
+ */
+ if (sinfo == NULL || sinfo->next != NULL)
+ return -EBADMSG;
+
+ ret = pkcs7_digest(pkcs7, sinfo);
+ if (ret)
+ return ret;
+
+ *buf = sinfo->sig->digest;
+ *len = sinfo->sig->digest_size;
+
+ for (i = 0; i < HASH_ALGO__LAST; i++)
+ if (!strcmp(hash_algo_name[i], sinfo->sig->hash_algo)) {
+ *hash_algo = i;
+ break;
+ }
+
+ return 0;
+}
+
/*
* Find the key (X.509 certificate) to use to verify a PKCS#7 message. PKCS#7
* uses the issuer's name and the issuing certificate serial number for
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 364b9df9d631..d7f43d4ea925 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -184,6 +184,7 @@ static int software_key_eds_op(struct kernel_pkey_params *params,
if (IS_ERR(tfm))
return PTR_ERR(tfm);
+ ret = -ENOMEM;
req = akcipher_request_alloc(tfm, GFP_KERNEL);
if (!req)
goto error_free_tfm;
diff --git a/crypto/asymmetric_keys/verify_pefile.c b/crypto/asymmetric_keys/verify_pefile.c
index 3b303fe2f061..cc9dbcecaaca 100644
--- a/crypto/asymmetric_keys/verify_pefile.c
+++ b/crypto/asymmetric_keys/verify_pefile.c
@@ -96,7 +96,7 @@ static int pefile_parse_binary(const void *pebuf, unsigned int pelen,
if (!ddir->certs.virtual_address || !ddir->certs.size) {
pr_debug("Unsigned PE binary\n");
- return -EKEYREJECTED;
+ return -ENODATA;
}
chkaddr(ctx->header_size, ddir->certs.virtual_address,
@@ -403,6 +403,8 @@ error_no_desc:
* (*) 0 if at least one signature chain intersects with the keys in the trust
* keyring, or:
*
+ * (*) -ENODATA if there is no signature present.
+ *
* (*) -ENOPKG if a suitable crypto module couldn't be found for a check on a
* chain.
*
OpenPOWER on IntegriCloud