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lib/rsa: Use the 'keyfile' argument from mkimage 

Keys can be derived from keydir, and the "key-name-hint" property of
the FIT. They can also be specified ad-literam via 'keyfile'. Update
the RSA signing path to use the appropriate one.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Alexandru Gagniuc 2021-02-19 12:45:18 -06:00 committed by Tom Rini
parent 36bfcb62b3
commit 824ee745fb
1 changed files with 26 additions and 8 deletions
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34
lib/rsa/rsa-sign.c
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@ -210,14 +210,20 @@ static int rsa_get_pub_key(const char *keydir, const char *name,
* @return 0 if ok, -ve on error (in which case *rsap will be set to NULL)
*/
static int rsa_pem_get_priv_key(const char *keydir, const char *name,
RSA **rsap)
const char *keyfile, RSA **rsap)
{
char path[1024];
RSA *rsa;
FILE *f;
*rsap = NULL;
snprintf(path, sizeof(path), "%s/%s.key", keydir, name);
if (keydir && name)
snprintf(path, sizeof(path), "%s/%s.key", keydir, name);
else if (keyfile)
snprintf(path, sizeof(path), "%s", keyfile);
else
return -EINVAL;
f = fopen(path, "r");
if (!f) {
fprintf(stderr, "Couldn't open RSA private key: '%s': %s\n",
@ -247,6 +253,7 @@ static int rsa_pem_get_priv_key(const char *keydir, const char *name,
* @return 0 if ok, -ve on error (in which case *rsap will be set to NULL)
*/
static int rsa_engine_get_priv_key(const char *keydir, const char *name,
const char *keyfile,
ENGINE *engine, RSA **rsap)
{
const char *engine_id;
@ -260,6 +267,10 @@ static int rsa_engine_get_priv_key(const char *keydir, const char *name,
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),
@ -274,14 +285,19 @@ static int rsa_engine_get_priv_key(const char *keydir, const char *name,
"pkcs11:object=%s;type=private",
name);
} else if (engine_id) {
if (keydir)
if (keydir && name)
snprintf(key_id, sizeof(key_id),
"%s%s",
keydir, name);
else
else if (keydir)
snprintf(key_id, sizeof(key_id),
"%s",
name);
else if (keyfile)
snprintf(key_id, sizeof(key_id), "%s", keyfile);
else
return -EINVAL;
} else {
fprintf(stderr, "Engine not supported\n");
return -ENOTSUP;
@ -319,11 +335,12 @@ err_rsa:
* @return 0 if ok, -ve on error (in which case *rsap will be set to NULL)
*/
static int rsa_get_priv_key(const char *keydir, const char *name,
ENGINE *engine, RSA **rsap)
const char *keyfile, ENGINE *engine, RSA **rsap)
{
if (engine)
return rsa_engine_get_priv_key(keydir, name, engine, rsap);
return rsa_pem_get_priv_key(keydir, name, rsap);
return rsa_engine_get_priv_key(keydir, name, keyfile, engine,
rsap);
return rsa_pem_get_priv_key(keydir, name, keyfile, rsap);
}
static int rsa_init(void)
@ -534,7 +551,8 @@ int rsa_sign(struct image_sign_info *info,
goto err_engine;
}
ret = rsa_get_priv_key(info->keydir, info->keyname, e, &rsa);
ret = rsa_get_priv_key(info->keydir, info->keyname, info->keyfile,
e, &rsa);
if (ret)
goto err_priv;
ret = rsa_sign_with_key(rsa, info->padding, info->checksum, region,