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ima-evm-utils: Convert read_priv_key to EVP_PKEY API

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Introduce read_priv_pkey() to read keys using EVP_PKEY, and change
read_priv_key() to be wrapper for it.

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Acked-by: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Vitaly Chikunov 2019-07-03 18:50:08 +03:00 committed by Mimi Zohar
parent 71c1be47e7
commit 3df7b5d779
1 changed files with 22 additions and 5 deletions
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27
src/libimaevm.c
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@ -753,10 +753,10 @@ void calc_keyid_v2(uint32_t *keyid, char *str, RSA *key)
free(pkey);
}
static RSA *read_priv_key(const char *keyfile, const char *keypass)
static EVP_PKEY *read_priv_pkey(const char *keyfile, const char *keypass)
{
FILE *fp;
RSA *key;
EVP_PKEY *pkey;
fp = fopen(keyfile, "r");
if (!fp) {
@ -764,15 +764,32 @@ static RSA *read_priv_key(const char *keyfile, const char *keypass)
return NULL;
}
ERR_load_crypto_strings();
key = PEM_read_RSAPrivateKey(fp, NULL, NULL, (void *)keypass);
if (!key) {
pkey = PEM_read_PrivateKey(fp, NULL, NULL, (void *)keypass);
if (!pkey) {
char str[256];
ERR_error_string(ERR_get_error(), str);
log_err("PEM_read_RSAPrivateKey() failed: %s\n", str);
log_err("PEM_read_PrivateKey() failed: %s\n", str);
}
fclose(fp);
return pkey;
}
static RSA *read_priv_key(const char *keyfile, const char *keypass)
{
EVP_PKEY *pkey;
RSA *key;
pkey = read_priv_pkey(keyfile, keypass);
if (!pkey)
return NULL;
key = EVP_PKEY_get1_RSA(pkey);
EVP_PKEY_free(pkey);
if (!key) {
log_err("read_priv_key: unsupported key type\n");
return NULL;
}
return key;
}