+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013, Google Inc.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include "mkimage.h"
+#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <image.h>
#include <time.h>
+#include <u-boot/fdt-libcrypto.h>
+#include <openssl/bn.h>
+#include <openssl/ec.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
-
-#if OPENSSL_VERSION_NUMBER >= 0x10000000L
-#define HAVE_ERR_REMOVE_THREAD_STATE
-#endif
+#include <openssl/engine.h>
static int rsa_err(const char *msg)
{
}
/**
- * rsa_get_pub_key() - read a public key from a .crt file
+ * rsa_pem_get_pub_key() - read a public key from a .crt file
*
* @keydir: Directory containins the key
* @name Name of key file (will have a .crt extension)
- * @rsap Returns RSA object, or NULL on failure
- * @return 0 if ok, -ve on error (in which case *rsap will be set to NULL)
+ * @evpp Returns EVP_PKEY object, or NULL on failure
+ * @return 0 if ok, -ve on error (in which case *evpp will be set to NULL)
*/
-static int rsa_get_pub_key(const char *keydir, const char *name, RSA **rsap)
+static int rsa_pem_get_pub_key(const char *keydir, const char *name, EVP_PKEY **evpp)
{
char path[1024];
- EVP_PKEY *key;
+ EVP_PKEY *key = NULL;
X509 *cert;
- RSA *rsa;
FILE *f;
int ret;
- *rsap = NULL;
+ if (!evpp)
+ return -EINVAL;
+
+ *evpp = NULL;
snprintf(path, sizeof(path), "%s/%s.crt", keydir, name);
f = fopen(path, "r");
if (!f) {
goto err_pubkey;
}
- /* Convert to a RSA_style key. */
- rsa = EVP_PKEY_get1_RSA(key);
- if (!rsa) {
- rsa_err("Couldn't convert to a RSA style key");
- goto err_rsa;
- }
fclose(f);
- EVP_PKEY_free(key);
+ *evpp = key;
X509_free(cert);
- *rsap = rsa;
return 0;
-err_rsa:
- EVP_PKEY_free(key);
err_pubkey:
X509_free(cert);
err_cert:
}
/**
- * rsa_get_priv_key() - read a private key from a .key file
+ * rsa_engine_get_pub_key() - read a public key from given engine
*
- * @keydir: Directory containins the key
+ * @keydir: Key prefix
+ * @name Name of key
+ * @engine Engine to use
+ * @evpp Returns EVP_PKEY object, or NULL on failure
+ * @return 0 if ok, -ve on error (in which case *evpp will be set to NULL)
+ */
+static int rsa_engine_get_pub_key(const char *keydir, const char *name,
+ ENGINE *engine, EVP_PKEY **evpp)
+{
+ const char *engine_id;
+ char key_id[1024];
+ EVP_PKEY *key = NULL;
+
+ if (!evpp)
+ return -EINVAL;
+
+ *evpp = NULL;
+
+ engine_id = ENGINE_get_id(engine);
+
+ if (engine_id && !strcmp(engine_id, "pkcs11")) {
+ if (keydir)
+ if (strstr(keydir, "object="))
+ snprintf(key_id, sizeof(key_id),
+ "pkcs11:%s;type=public",
+ keydir);
+ else
+ snprintf(key_id, sizeof(key_id),
+ "pkcs11:%s;object=%s;type=public",
+ keydir, name);
+ else
+ snprintf(key_id, sizeof(key_id),
+ "pkcs11:object=%s;type=public",
+ name);
+ } else if (engine_id) {
+ if (keydir)
+ snprintf(key_id, sizeof(key_id),
+ "%s%s",
+ keydir, name);
+ else
+ snprintf(key_id, sizeof(key_id),
+ "%s",
+ name);
+ } else {
+ fprintf(stderr, "Engine not supported\n");
+ return -ENOTSUP;
+ }
+
+ key = ENGINE_load_public_key(engine, key_id, NULL, NULL);
+ if (!key)
+ return rsa_err("Failure loading public key from engine");
+
+ *evpp = key;
+
+ return 0;
+}
+
+/**
+ * rsa_get_pub_key() - read a public key
+ *
+ * @keydir: Directory containing the key (PEM file) or key prefix (engine)
+ * @name Name of key file (will have a .crt extension)
+ * @engine Engine to use
+ * @evpp Returns EVP_PKEY object, or NULL on failure
+ * @return 0 if ok, -ve on error (in which case *evpp will be set to NULL)
+ */
+static int rsa_get_pub_key(const char *keydir, const char *name,
+ ENGINE *engine, EVP_PKEY **evpp)
+{
+ if (engine)
+ return rsa_engine_get_pub_key(keydir, name, engine, evpp);
+ return rsa_pem_get_pub_key(keydir, name, evpp);
+}
+
+/**
+ * rsa_pem_get_priv_key() - read a private key from a .key file
+ *
+ * @keydir: Directory containing the key
* @name Name of key file (will have a .key extension)
- * @rsap Returns RSA object, or NULL on failure
- * @return 0 if ok, -ve on error (in which case *rsap will be set to NULL)
+ * @evpp Returns EVP_PKEY object, or NULL on failure
+ * @return 0 if ok, -ve on error (in which case *evpp will be set to NULL)
*/
-static int rsa_get_priv_key(const char *keydir, const char *name, RSA **rsap)
+static int rsa_pem_get_priv_key(const char *keydir, const char *name,
+ const char *keyfile, EVP_PKEY **evpp)
{
- char path[1024];
- RSA *rsa;
- FILE *f;
+ char path[1024] = {0};
+ FILE *f = NULL;
+
+ if (!evpp)
+ return -EINVAL;
+
+ *evpp = NULL;
+ if (keydir && name)
+ snprintf(path, sizeof(path), "%s/%s.key", keydir, name);
+ else if (keyfile)
+ snprintf(path, sizeof(path), "%s", keyfile);
+ else
+ return -EINVAL;
- *rsap = NULL;
- snprintf(path, sizeof(path), "%s/%s.key", keydir, name);
f = fopen(path, "r");
if (!f) {
fprintf(stderr, "Couldn't open RSA private key: '%s': %s\n",
return -ENOENT;
}
- rsa = PEM_read_RSAPrivateKey(f, 0, NULL, path);
- if (!rsa) {
+ if (!PEM_read_PrivateKey(f, evpp, NULL, path)) {
rsa_err("Failure reading private key");
fclose(f);
return -EPROTO;
}
fclose(f);
- *rsap = rsa;
return 0;
}
+/**
+ * rsa_engine_get_priv_key() - read a private key from given engine
+ *
+ * @keydir: Key prefix
+ * @name Name of key
+ * @engine Engine to use
+ * @evpp Returns EVP_PKEY object, or NULL on failure
+ * @return 0 if ok, -ve on error (in which case *evpp will be set to NULL)
+ */
+static int rsa_engine_get_priv_key(const char *keydir, const char *name,
+ const char *keyfile,
+ ENGINE *engine, EVP_PKEY **evpp)
+{
+ const char *engine_id;
+ char key_id[1024];
+ EVP_PKEY *key = NULL;
+
+ if (!evpp)
+ return -EINVAL;
+
+ engine_id = ENGINE_get_id(engine);
+
+ if (engine_id && !strcmp(engine_id, "pkcs11")) {
+ if (!keydir && !name) {
+ fprintf(stderr, "Please use 'keydir' with PKCS11\n");
+ return -EINVAL;
+ }
+ if (keydir)
+ if (strstr(keydir, "object="))
+ snprintf(key_id, sizeof(key_id),
+ "pkcs11:%s;type=private",
+ keydir);
+ else
+ snprintf(key_id, sizeof(key_id),
+ "pkcs11:%s;object=%s;type=private",
+ keydir, name);
+ else
+ snprintf(key_id, sizeof(key_id),
+ "pkcs11:object=%s;type=private",
+ name);
+ } else if (engine_id) {
+ if (keydir && name)
+ snprintf(key_id, sizeof(key_id),
+ "%s%s",
+ keydir, name);
+ else if (name)
+ snprintf(key_id, sizeof(key_id),
+ "%s",
+ name ? name : "");
+ else if (keyfile)
+ snprintf(key_id, sizeof(key_id), "%s", keyfile);
+ else
+ return -EINVAL;
+
+ } else {
+ fprintf(stderr, "Engine not supported\n");
+ return -ENOTSUP;
+ }
+
+ key = ENGINE_load_private_key(engine, key_id, NULL, NULL);
+ if (!key)
+ return rsa_err("Failure loading private key from engine");
+
+ *evpp = key;
+
+ return 0;
+}
+
+/**
+ * rsa_get_priv_key() - read a private key
+ *
+ * @keydir: Directory containing the key (PEM file) or key prefix (engine)
+ * @name Name of key
+ * @engine Engine to use for signing
+ * @evpp Returns EVP_PKEY object, or NULL on failure
+ * @return 0 if ok, -ve on error (in which case *evpp will be set to NULL)
+ */
+static int rsa_get_priv_key(const char *keydir, const char *name,
+ const char *keyfile, ENGINE *engine, EVP_PKEY **evpp)
+{
+ if (engine)
+ return rsa_engine_get_priv_key(keydir, name, keyfile, engine,
+ evpp);
+ return rsa_pem_get_priv_key(keydir, name, keyfile, evpp);
+}
+
static int rsa_init(void)
{
int ret;
- ret = SSL_library_init();
+ ret = OPENSSL_init_ssl(0, NULL);
if (!ret) {
fprintf(stderr, "Failure to init SSL library\n");
return -1;
}
- SSL_load_error_strings();
- OpenSSL_add_all_algorithms();
- OpenSSL_add_all_digests();
- OpenSSL_add_all_ciphers();
+ return 0;
+}
+
+static int rsa_engine_init(const char *engine_id, ENGINE **pe)
+{
+ const char *key_pass;
+ ENGINE *e;
+ int ret;
+
+ ENGINE_load_builtin_engines();
+
+ e = ENGINE_by_id(engine_id);
+ if (!e) {
+ fprintf(stderr, "Engine isn't available\n");
+ return -1;
+ }
+
+ if (!ENGINE_init(e)) {
+ fprintf(stderr, "Couldn't initialize engine\n");
+ ret = -1;
+ goto err_engine_init;
+ }
+
+ if (!ENGINE_set_default_RSA(e)) {
+ fprintf(stderr, "Couldn't set engine as default for RSA\n");
+ ret = -1;
+ goto err_set_rsa;
+ }
+
+ key_pass = getenv("MKIMAGE_SIGN_PIN");
+ if (key_pass) {
+ if (!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0)) {
+ fprintf(stderr, "Couldn't set PIN\n");
+ ret = -1;
+ goto err_set_pin;
+ }
+ }
+
+ *pe = e;
return 0;
+
+err_set_pin:
+err_set_rsa:
+ ENGINE_finish(e);
+err_engine_init:
+ ENGINE_free(e);
+ return ret;
}
-static void rsa_remove(void)
+static void rsa_engine_remove(ENGINE *e)
{
- CRYPTO_cleanup_all_ex_data();
- ERR_free_strings();
-#ifdef HAVE_ERR_REMOVE_THREAD_STATE
- ERR_remove_thread_state(NULL);
-#else
- ERR_remove_state(0);
-#endif
- EVP_cleanup();
+ if (e) {
+ ENGINE_finish(e);
+ ENGINE_free(e);
+ }
}
-static int rsa_sign_with_key(RSA *rsa, struct checksum_algo *checksum_algo,
+static int rsa_sign_with_key(EVP_PKEY *pkey, struct padding_algo *padding_algo,
+ struct checksum_algo *checksum_algo,
const struct image_region region[], int region_count,
uint8_t **sigp, uint *sig_size)
{
- EVP_PKEY *key;
+ EVP_PKEY_CTX *ckey;
EVP_MD_CTX *context;
- int size, ret = 0;
+ int ret = 0;
+ size_t size;
uint8_t *sig;
int i;
- key = EVP_PKEY_new();
- if (!key)
- return rsa_err("EVP_PKEY object creation failed");
-
- if (!EVP_PKEY_set1_RSA(key, rsa)) {
- ret = rsa_err("EVP key setup failed");
- goto err_set;
- }
-
- size = EVP_PKEY_size(key);
+ size = EVP_PKEY_size(pkey);
sig = malloc(size);
if (!sig) {
- fprintf(stderr, "Out of memory for signature (%d bytes)\n",
+ fprintf(stderr, "Out of memory for signature (%zu bytes)\n",
size);
ret = -ENOMEM;
goto err_alloc;
goto err_create;
}
EVP_MD_CTX_init(context);
- if (!EVP_SignInit(context, checksum_algo->calculate_sign())) {
+
+ ckey = EVP_PKEY_CTX_new(pkey, NULL);
+ if (!ckey) {
+ ret = rsa_err("EVP key context creation failed");
+ goto err_create;
+ }
+
+ if (EVP_DigestSignInit(context, &ckey,
+ checksum_algo->calculate_sign(),
+ NULL, pkey) <= 0) {
ret = rsa_err("Signer setup failed");
goto err_sign;
}
+#ifdef CONFIG_FIT_RSASSA_PSS
+ if (padding_algo && !strcmp(padding_algo->name, "pss")) {
+ if (EVP_PKEY_CTX_set_rsa_padding(ckey,
+ RSA_PKCS1_PSS_PADDING) <= 0) {
+ ret = rsa_err("Signer padding setup failed");
+ goto err_sign;
+ }
+ }
+#endif /* CONFIG_FIT_RSASSA_PSS */
+
for (i = 0; i < region_count; i++) {
- if (!EVP_SignUpdate(context, region[i].data, region[i].size)) {
+ if (!EVP_DigestSignUpdate(context, region[i].data,
+ region[i].size)) {
ret = rsa_err("Signing data failed");
goto err_sign;
}
}
- if (!EVP_SignFinal(context, sig, sig_size, key)) {
+ if (!EVP_DigestSignFinal(context, sig, &size)) {
ret = rsa_err("Could not obtain signature");
goto err_sign;
}
- EVP_MD_CTX_cleanup(context);
+
+ EVP_MD_CTX_reset(context);
EVP_MD_CTX_destroy(context);
- EVP_PKEY_free(key);
- debug("Got signature: %d bytes, expected %d\n", *sig_size, size);
+ debug("Got signature: %zu bytes, expected %d\n", size, EVP_PKEY_size(pkey));
*sigp = sig;
*sig_size = size;
err_create:
free(sig);
err_alloc:
-err_set:
- EVP_PKEY_free(key);
return ret;
}
const struct image_region region[], int region_count,
uint8_t **sigp, uint *sig_len)
{
- RSA *rsa;
+ EVP_PKEY *pkey = NULL;
+ ENGINE *e = NULL;
int ret;
ret = rsa_init();
if (ret)
return ret;
- ret = rsa_get_priv_key(info->keydir, info->keyname, &rsa);
+ if (info->engine_id) {
+ ret = rsa_engine_init(info->engine_id, &e);
+ if (ret)
+ return ret;
+ }
+
+ ret = rsa_get_priv_key(info->keydir, info->keyname, info->keyfile,
+ e, &pkey);
if (ret)
goto err_priv;
- ret = rsa_sign_with_key(rsa, info->algo->checksum, region,
+ ret = rsa_sign_with_key(pkey, info->padding, info->checksum, region,
region_count, sigp, sig_len);
if (ret)
goto err_sign;
- RSA_free(rsa);
- rsa_remove();
+ EVP_PKEY_free(pkey);
+ if (info->engine_id)
+ rsa_engine_remove(e);
return ret;
err_sign:
- RSA_free(rsa);
+ EVP_PKEY_free(pkey);
err_priv:
- rsa_remove();
+ if (info->engine_id)
+ rsa_engine_remove(e);
+ return ret;
+}
+
+/*
+ * rsa_get_exponent(): - Get the public exponent from an RSA key
+ */
+static int rsa_get_exponent(RSA *key, uint64_t *e)
+{
+ int ret;
+ BIGNUM *bn_te;
+ const BIGNUM *key_e;
+ uint64_t te;
+
+ ret = -EINVAL;
+ bn_te = NULL;
+
+ if (!e)
+ goto cleanup;
+
+ RSA_get0_key(key, NULL, &key_e, NULL);
+ if (BN_num_bits(key_e) > 64)
+ goto cleanup;
+
+ *e = BN_get_word(key_e);
+
+ if (BN_num_bits(key_e) < 33) {
+ ret = 0;
+ goto cleanup;
+ }
+
+ bn_te = BN_dup(key_e);
+ if (!bn_te)
+ goto cleanup;
+
+ if (!BN_rshift(bn_te, bn_te, 32))
+ goto cleanup;
+
+ if (!BN_mask_bits(bn_te, 32))
+ goto cleanup;
+
+ te = BN_get_word(bn_te);
+ te <<= 32;
+ *e |= te;
+ ret = 0;
+
+cleanup:
+ if (bn_te)
+ BN_free(bn_te);
+
return ret;
}
/*
* rsa_get_params(): - Get the important parameters of an RSA public key
*/
-int rsa_get_params(RSA *key, uint32_t *n0_invp, BIGNUM **modulusp,
- BIGNUM **r_squaredp)
+int rsa_get_params(RSA *key, uint64_t *exponent, uint32_t *n0_invp,
+ BIGNUM **modulusp, BIGNUM **r_squaredp)
{
BIGNUM *big1, *big2, *big32, *big2_32;
BIGNUM *n, *r, *r_squared, *tmp;
+ const BIGNUM *key_n;
BN_CTX *bn_ctx = BN_CTX_new();
int ret = 0;
return -ENOMEM;
}
- if (!BN_copy(n, key->n) || !BN_set_word(big1, 1L) ||
+ if (0 != rsa_get_exponent(key, exponent))
+ ret = -1;
+
+ RSA_get0_key(key, &key_n, NULL, NULL);
+ if (!BN_copy(n, key_n) || !BN_set_word(big1, 1L) ||
!BN_set_word(big2, 2L) || !BN_set_word(big32, 32L))
ret = -1;
return ret;
}
-static int fdt_add_bignum(void *blob, int noffset, const char *prop_name,
- BIGNUM *num, int num_bits)
-{
- int nwords = num_bits / 32;
- int size;
- uint32_t *buf, *ptr;
- BIGNUM *tmp, *big2, *big32, *big2_32;
- BN_CTX *ctx;
- int ret;
-
- tmp = BN_new();
- big2 = BN_new();
- big32 = BN_new();
- big2_32 = BN_new();
- if (!tmp || !big2 || !big32 || !big2_32) {
- fprintf(stderr, "Out of memory (bignum)\n");
- return -ENOMEM;
- }
- ctx = BN_CTX_new();
- if (!tmp) {
- fprintf(stderr, "Out of memory (bignum context)\n");
- return -ENOMEM;
- }
- BN_set_word(big2, 2L);
- BN_set_word(big32, 32L);
- BN_exp(big2_32, big2, big32, ctx); /* B = 2^32 */
-
- size = nwords * sizeof(uint32_t);
- buf = malloc(size);
- if (!buf) {
- fprintf(stderr, "Out of memory (%d bytes)\n", size);
- return -ENOMEM;
- }
-
- /* Write out modulus as big endian array of integers */
- for (ptr = buf + nwords - 1; ptr >= buf; ptr--) {
- BN_mod(tmp, num, big2_32, ctx); /* n = N mod B */
- *ptr = cpu_to_fdt32(BN_get_word(tmp));
- BN_rshift(num, num, 32); /* N = N/B */
- }
-
- ret = fdt_setprop(blob, noffset, prop_name, buf, size);
- if (ret) {
- fprintf(stderr, "Failed to write public key to FIT\n");
- return -ENOSPC;
- }
- free(buf);
- BN_free(tmp);
- BN_free(big2);
- BN_free(big32);
- BN_free(big2_32);
-
- return ret;
-}
-
int rsa_add_verify_data(struct image_sign_info *info, void *keydest)
{
BIGNUM *modulus, *r_squared;
+ uint64_t exponent;
uint32_t n0_inv;
int parent, node;
char name[100];
int ret;
int bits;
RSA *rsa;
+ EVP_PKEY *pkey = NULL;
+ ENGINE *e = NULL;
debug("%s: Getting verification data\n", __func__);
- ret = rsa_get_pub_key(info->keydir, info->keyname, &rsa);
+ if (info->engine_id) {
+ ret = rsa_engine_init(info->engine_id, &e);
+ if (ret)
+ return ret;
+ }
+ ret = rsa_get_pub_key(info->keydir, info->keyname, e, &pkey);
if (ret)
- return ret;
- ret = rsa_get_params(rsa, &n0_inv, &modulus, &r_squared);
+ goto err_get_pub_key;
+
+ rsa = EVP_PKEY_get0_RSA(pkey);
+ ret = rsa_get_params(rsa, &exponent, &n0_inv, &modulus, &r_squared);
if (ret)
- return ret;
+ goto err_get_params;
bits = BN_num_bits(modulus);
parent = fdt_subnode_offset(keydest, 0, FIT_SIG_NODENAME);
if (parent == -FDT_ERR_NOTFOUND) {
}
if (!ret) {
- ret = fdt_setprop_string(keydest, node, "key-name-hint",
- info->keyname);
+ ret = fdt_setprop_string(keydest, node, FIT_KEY_HINT,
+ info->keyname);
}
if (!ret)
ret = fdt_setprop_u32(keydest, node, "rsa,num-bits", bits);
if (!ret)
ret = fdt_setprop_u32(keydest, node, "rsa,n0-inverse", n0_inv);
if (!ret) {
+ ret = fdt_setprop_u64(keydest, node, "rsa,exponent", exponent);
+ }
+ if (!ret) {
ret = fdt_add_bignum(keydest, node, "rsa,modulus", modulus,
bits);
}
}
if (!ret) {
ret = fdt_setprop_string(keydest, node, FIT_ALGO_PROP,
- info->algo->name);
+ info->name);
}
- if (info->require_keys) {
- ret = fdt_setprop_string(keydest, node, "required",
+ if (!ret && info->require_keys) {
+ ret = fdt_setprop_string(keydest, node, FIT_KEY_REQUIRED,
info->require_keys);
}
done:
BN_free(modulus);
BN_free(r_squared);
if (ret)
- return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
+ ret = ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
+err_get_params:
+ EVP_PKEY_free(pkey);
+err_get_pub_key:
+ if (info->engine_id)
+ rsa_engine_remove(e);
- return 0;
+ return ret;
}
projects / platform / kernel / u-boot.git / blobdiff