libssh/tests/unittests/torture_pki_rsa.c

#include "config.h"

#define LIBSSH_STATIC

#include <sys/stat.h>
#include <fcntl.h>

#include "torture.h"
#include "torture_pki.h"
#include "torture_key.h"
#include "pki.c"

#define LIBSSH_RSA_TESTKEY "libssh_testkey.id_rsa"
#define LIBSSH_RSA_TESTKEY_PASSPHRASE "libssh_testkey_passphrase.id_rsa"

const unsigned char RSA_HASH[] = "12345678901234567890";
const unsigned char SHA256_HASH[] = "12345678901234567890123456789012";
const unsigned char SHA512_HASH[] = "1234567890123456789012345678901234567890"
                                    "123456789012345678901234";

static int setup_rsa_key(void **state)
{
    (void) state; /* unused */

    unlink(LIBSSH_RSA_TESTKEY);
    unlink(LIBSSH_RSA_TESTKEY_PASSPHRASE);
    unlink(LIBSSH_RSA_TESTKEY ".pub");
    unlink(LIBSSH_RSA_TESTKEY "-cert.pub");

    torture_write_file(LIBSSH_RSA_TESTKEY,
                       torture_get_testkey(SSH_KEYTYPE_RSA, 0, 0));
    torture_write_file(LIBSSH_RSA_TESTKEY_PASSPHRASE,
                       torture_get_testkey(SSH_KEYTYPE_RSA, 0, 1));
    torture_write_file(LIBSSH_RSA_TESTKEY ".pub",
                       torture_get_testkey_pub(SSH_KEYTYPE_RSA, 0));
    torture_write_file(LIBSSH_RSA_TESTKEY "-cert.pub",
                       torture_get_testkey_pub(SSH_KEYTYPE_RSA_CERT01, 0));

    return 0;
}

static int setup_rsa_openssh_key(void **state)
{
    (void) state; /* unused */

    unlink(LIBSSH_RSA_TESTKEY);
    unlink(LIBSSH_RSA_TESTKEY_PASSPHRASE);
    unlink(LIBSSH_RSA_TESTKEY ".pub");
    unlink(LIBSSH_RSA_TESTKEY "-cert.pub");

    torture_write_file(LIBSSH_RSA_TESTKEY,
                       torture_get_openssh_testkey(SSH_KEYTYPE_RSA, 0, 0));
    torture_write_file(LIBSSH_RSA_TESTKEY_PASSPHRASE,
                       torture_get_openssh_testkey(SSH_KEYTYPE_RSA, 0, 1));
    torture_write_file(LIBSSH_RSA_TESTKEY ".pub",
                       torture_get_testkey_pub(SSH_KEYTYPE_RSA, 0));
    torture_write_file(LIBSSH_RSA_TESTKEY "-cert.pub",
                       torture_get_testkey_pub(SSH_KEYTYPE_RSA_CERT01, 0));

    return 0;
}

static int teardown(void **state) {
    (void) state; /* unused */

    unlink(LIBSSH_RSA_TESTKEY);
    unlink(LIBSSH_RSA_TESTKEY_PASSPHRASE);
    unlink(LIBSSH_RSA_TESTKEY ".pub");
    unlink(LIBSSH_RSA_TESTKEY "-cert.pub");

    return 0;
}

static void torture_pki_rsa_import_pubkey_file(void **state)
{
    ssh_key pubkey = NULL;
    int rc;

    (void)state;

    /* The key doesn't have the hostname as comment after the key */
    rc = ssh_pki_import_pubkey_file(LIBSSH_RSA_TESTKEY ".pub", &pubkey);
    assert_return_code(rc, errno);
    assert_non_null(pubkey);

    ssh_key_free(pubkey);
}

static void torture_pki_rsa_import_pubkey_from_openssh_privkey(void **state)
{
    ssh_key pubkey = NULL;
    int rc;

    (void)state;

    /* The key doesn't have the hostname as comment after the key */
    rc = ssh_pki_import_pubkey_file(LIBSSH_RSA_TESTKEY_PASSPHRASE, &pubkey);
    assert_return_code(rc, errno);
    assert_non_null(pubkey);

    ssh_key_free(pubkey);
}

static void torture_pki_rsa_import_privkey_base64_NULL_key(void **state)
{
    int rc;
    const char *passphrase = torture_get_testkey_passphrase();

    (void) state; /* unused */

    /* test if it returns -1 if key is NULL */
    rc = ssh_pki_import_privkey_base64(torture_get_testkey(SSH_KEYTYPE_RSA, 0, 0),
                                       passphrase,
                                       NULL,
                                       NULL,
                                       NULL);
    assert_true(rc == -1);

}

static void torture_pki_rsa_import_privkey_base64_NULL_str(void **state)
{
    int rc;
    ssh_key key = NULL;
    const char *passphrase = torture_get_testkey_passphrase();

    (void) state; /* unused */

    /* test if it returns -1 if key_str is NULL */
    rc = ssh_pki_import_privkey_base64(NULL, passphrase, NULL, NULL, &key);
    assert_true(rc == -1);

    ssh_key_free(key);
}

static void torture_pki_rsa_import_privkey_base64(void **state)
{
    int rc;
    char *key_str = NULL;
    ssh_key key = NULL;
    const char *passphrase = torture_get_testkey_passphrase();
    enum ssh_keytypes_e type;

    (void) state; /* unused */

    key_str = torture_pki_read_file(LIBSSH_RSA_TESTKEY);
    assert_true(key_str != NULL);

    rc = ssh_pki_import_privkey_base64(key_str, passphrase, NULL, NULL, &key);
    assert_true(rc == 0);

    type = ssh_key_type(key);
    assert_true(type == SSH_KEYTYPE_RSA);

    rc = ssh_key_is_private(key);
    assert_true(rc == 1);

    rc = ssh_key_is_public(key);
    assert_true(rc == 1);

    free(key_str);
    ssh_key_free(key);
}

static void torture_pki_rsa_publickey_from_privatekey(void **state)
{
    int rc;
    ssh_key key = NULL;
    ssh_key pubkey = NULL;
    const char *passphrase = NULL;

    (void) state; /* unused */

    rc = ssh_pki_import_privkey_base64(torture_get_testkey(SSH_KEYTYPE_RSA, 0, 0),
                                       passphrase,
                                       NULL,
                                       NULL,
                                       &key);
    assert_true(rc == 0);

    rc = ssh_key_is_private(key);
    assert_true(rc == 1);

    rc = ssh_pki_export_privkey_to_pubkey(key, &pubkey);
    assert_true(rc == SSH_OK);

    ssh_key_free(key);
    ssh_key_free(pubkey);
}

static void torture_pki_rsa_copy_cert_to_privkey(void **state)
{
    /*
     * Tests copying a cert loaded into a public key to a private key.
     * The function is encryption type agnostic, no need to run this against
     * all supported key types.
     */
    int rc;
    const char *passphrase = torture_get_testkey_passphrase();
    ssh_key pubkey = NULL;
    ssh_key privkey = NULL;
    ssh_key cert = NULL;

    (void) state; /* unused */

    rc = ssh_pki_import_cert_file(LIBSSH_RSA_TESTKEY "-cert.pub", &cert);
    assert_true(rc == SSH_OK);

    rc = ssh_pki_import_pubkey_file(LIBSSH_RSA_TESTKEY ".pub", &pubkey);
    assert_true(rc == SSH_OK);

    rc = ssh_pki_import_privkey_base64(torture_get_testkey(SSH_KEYTYPE_RSA, 0, 0),
                                       passphrase,
                                       NULL,
                                       NULL,
                                       &privkey);
    assert_true(rc == SSH_OK);

    /* Basic sanity. */
    rc = ssh_pki_copy_cert_to_privkey(NULL, privkey);
    assert_true(rc == SSH_ERROR);

    rc = ssh_pki_copy_cert_to_privkey(pubkey, NULL);
    assert_true(rc == SSH_ERROR);

    /* A public key doesn't have a cert, copy should fail. */
    assert_true(pubkey->cert == NULL);
    rc = ssh_pki_copy_cert_to_privkey(pubkey, privkey);
    assert_true(rc == SSH_ERROR);

    /* Copying the cert to non-cert keys should work fine. */
    rc = ssh_pki_copy_cert_to_privkey(cert, pubkey);
    assert_true(rc == SSH_OK);
    rc = ssh_pki_copy_cert_to_privkey(cert, privkey);
    assert_true(rc == SSH_OK);

    /* The private key's cert is already set, another copy should fail. */
    rc = ssh_pki_copy_cert_to_privkey(cert, privkey);
    assert_true(rc == SSH_ERROR);

    ssh_key_free(cert);
    ssh_key_free(privkey);
    ssh_key_free(pubkey);
}

static void torture_pki_rsa_import_cert_file(void **state) {
    int rc;
    ssh_key cert = NULL;
    enum ssh_keytypes_e type;

    (void) state; /* unused */

    rc = ssh_pki_import_cert_file(LIBSSH_RSA_TESTKEY "-cert.pub", &cert);
    assert_true(rc == 0);

    type = ssh_key_type(cert);
    assert_true(type == SSH_KEYTYPE_RSA_CERT01);

    rc = ssh_key_is_public(cert);
    assert_true(rc == 1);

    ssh_key_free(cert);
}

static void torture_pki_rsa_publickey_base64(void **state)
{
    enum ssh_keytypes_e type;
    char *b64_key = NULL, *key_buf = NULL, *p = NULL;
    const char *q = NULL;
    ssh_key key = NULL;
    int rc;

    (void) state; /* unused */

    key_buf = strdup(torture_get_testkey_pub(SSH_KEYTYPE_RSA, 0));
    assert_true(key_buf != NULL);

    q = p = key_buf;
    while (*p != ' ') p++;
    *p = '\0';

    type = ssh_key_type_from_name(q);
    assert_true(type == SSH_KEYTYPE_RSA);

    q = ++p;
    while (*p != ' ') p++;
    *p = '\0';

    rc = ssh_pki_import_pubkey_base64(q, type, &key);
    assert_true(rc == 0);

    rc = ssh_pki_export_pubkey_base64(key, &b64_key);
    assert_true(rc == 0);

    assert_string_equal(q, b64_key);

    free(b64_key);
    free(key_buf);
    ssh_key_free(key);
}

static void torture_pki_rsa_generate_pubkey_from_privkey(void **state) {
    char pubkey_generated[4096] = {0};
    ssh_key privkey = NULL;
    ssh_key pubkey = NULL;
    int rc;
    int len;

    (void) state; /* unused */

    /* remove the public key, generate it from the private key and write it. */
    unlink(LIBSSH_RSA_TESTKEY ".pub");

    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY,
                                     NULL,
                                     NULL,
                                     NULL,
                                     &privkey);
    assert_true(rc == 0);

    rc = ssh_pki_export_privkey_to_pubkey(privkey, &pubkey);
    assert_true(rc == SSH_OK);

    rc = ssh_pki_export_pubkey_file(pubkey, LIBSSH_RSA_TESTKEY ".pub");
    assert_true(rc == 0);

    rc = torture_read_one_line(LIBSSH_RSA_TESTKEY ".pub",
                               pubkey_generated,
                               sizeof(pubkey_generated));
    assert_true(rc == 0);

    len = torture_pubkey_len(torture_get_testkey_pub(SSH_KEYTYPE_RSA, 0));
    assert_memory_equal(torture_get_testkey_pub(SSH_KEYTYPE_RSA, 0),
                        pubkey_generated,
                        len);

    ssh_key_free(privkey);
    ssh_key_free(pubkey);
}

static void torture_pki_rsa_duplicate_key(void **state)
{
    int rc;
    char *b64_key = NULL;
    char *b64_key_gen = NULL;
    ssh_key pubkey = NULL;
    ssh_key privkey = NULL;
    ssh_key privkey_dup = NULL;

    (void) state;

    rc = ssh_pki_import_pubkey_file(LIBSSH_RSA_TESTKEY ".pub", &pubkey);
    assert_true(rc == 0);
    assert_non_null(pubkey);

    rc = ssh_pki_export_pubkey_base64(pubkey, &b64_key);
    assert_true(rc == 0);
    ssh_key_free(pubkey);

    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY,
                                     NULL,
                                     NULL,
                                     NULL,
                                     &privkey);
    assert_true(rc == 0);
    assert_non_null(privkey);

    privkey_dup = ssh_key_dup(privkey);
    assert_non_null(privkey_dup);

    rc = ssh_pki_export_privkey_to_pubkey(privkey, &pubkey);
    assert_true(rc == SSH_OK);
    assert_non_null(pubkey);

    rc = ssh_pki_export_pubkey_base64(pubkey, &b64_key_gen);
    assert_true(rc == 0);
    assert_non_null(b64_key_gen);

    assert_string_equal(b64_key, b64_key_gen);

    rc = ssh_key_cmp(privkey, privkey_dup, SSH_KEY_CMP_PRIVATE);
    assert_true(rc == 0);

    ssh_key_free(pubkey);
    ssh_key_free(privkey);
    ssh_key_free(privkey_dup);
    ssh_string_free_char(b64_key);
    ssh_string_free_char(b64_key_gen);
}

static void torture_pki_rsa_generate_key(void **state)
{
    int rc;
    ssh_key key = NULL;
    ssh_signature sign = NULL;
    ssh_session session=ssh_new();
    (void) state;

    rc = ssh_pki_generate(SSH_KEYTYPE_RSA, 1024, &key);
    assert_true(rc == SSH_OK);
    assert_true(key != NULL);
    sign = pki_do_sign(key, RSA_HASH, 20);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session,sign,key,RSA_HASH,20);
    assert_true(rc == SSH_OK);
    ssh_signature_free(sign);
    ssh_key_free(key);
    key=NULL;

    rc = ssh_pki_generate(SSH_KEYTYPE_RSA, 2048, &key);
    assert_true(rc == SSH_OK);
    assert_true(key != NULL);
    sign = pki_do_sign(key, RSA_HASH, 20);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session,sign,key,RSA_HASH,20);
    assert_true(rc == SSH_OK);
    ssh_signature_free(sign);
    ssh_key_free(key);
    key=NULL;

    rc = ssh_pki_generate(SSH_KEYTYPE_RSA, 4096, &key);
    assert_true(rc == SSH_OK);
    assert_true(key != NULL);
    sign = pki_do_sign(key, RSA_HASH, 20);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session,sign,key,RSA_HASH,20);
    assert_true(rc == SSH_OK);
    ssh_signature_free(sign);
    ssh_key_free(key);
    key=NULL;

    ssh_free(session);
}

static void torture_pki_rsa_sha2(void **state)
{
    int rc;
    ssh_key key = NULL;
    ssh_signature sign;
    ssh_session session=ssh_new();
    (void) state;

    assert_non_null(session);

    /* Setup */
    rc = ssh_pki_generate(SSH_KEYTYPE_RSA, 2048, &key);
    assert_true(rc == SSH_OK);
    assert_true(key != NULL);

    /* Sign using automatic digest */
    sign = pki_do_sign_hash(key, RSA_HASH, 20, SSH_DIGEST_AUTO);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session, sign, key, RSA_HASH, 20);
    assert_ssh_return_code(session, rc);
    ssh_signature_free(sign);

    /* Sign using old SHA1 digest */
    sign = pki_do_sign_hash(key, RSA_HASH, 20, SSH_DIGEST_SHA1);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session, sign, key, RSA_HASH, 20);
    assert_ssh_return_code(session, rc);
    ssh_signature_free(sign);

    /* Sign using new SHA256 digest */
    sign = pki_do_sign_hash(key, SHA256_HASH, 32, SSH_DIGEST_SHA256);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session, sign, key, SHA256_HASH, 32);
    assert_ssh_return_code(session, rc);
    ssh_signature_free(sign);

    /* Sign using rsa-sha2-512 algorithm */
    sign = pki_do_sign_hash(key, SHA512_HASH, 64, SSH_DIGEST_SHA512);
    assert_true(sign != NULL);
    rc = pki_signature_verify(session, sign, key, SHA512_HASH, 64);
    assert_ssh_return_code(session, rc);
    ssh_signature_free(sign);

    /* Cleanup */
    ssh_key_free(key);
    ssh_free(session);
}

#ifdef HAVE_LIBCRYPTO
static void torture_pki_rsa_write_privkey(void **state)
{
    ssh_key origkey = NULL;
    ssh_key privkey = NULL;
    int rc;

    (void) state; /* unused */

    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY,
                                     NULL,
                                     NULL,
                                     NULL,
                                     &origkey);
    assert_true(rc == 0);
    assert_non_null(origkey);

    unlink(LIBSSH_RSA_TESTKEY);

    rc = ssh_pki_export_privkey_file(origkey,
                                     NULL,
                                     NULL,
                                     NULL,
                                     LIBSSH_RSA_TESTKEY);
    assert_true(rc == 0);

    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY,
                                     NULL,
                                     NULL,
                                     NULL,
                                     &privkey);
    assert_true(rc == 0);
    assert_non_null(privkey);

    rc = ssh_key_cmp(origkey, privkey, SSH_KEY_CMP_PRIVATE);
    assert_true(rc == 0);

    ssh_key_free(origkey);
    ssh_key_free(privkey);

    /* Test with passphrase */
    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY_PASSPHRASE,
                                     torture_get_testkey_passphrase(),
                                     NULL,
                                     NULL,
                                     &origkey);
    assert_true(rc == 0);
    assert_non_null(origkey);

    unlink(LIBSSH_RSA_TESTKEY_PASSPHRASE);
    rc = ssh_pki_export_privkey_file(origkey,
                                     torture_get_testkey_passphrase(),
                                     NULL,
                                     NULL,
                                     LIBSSH_RSA_TESTKEY_PASSPHRASE);
    assert_true(rc == 0);

    /* Test with invalid passphrase */
    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY_PASSPHRASE,
                                     "invalid secret",
                                     NULL,
                                     NULL,
                                     &privkey);
    assert_true(rc == SSH_ERROR);

    rc = ssh_pki_import_privkey_file(LIBSSH_RSA_TESTKEY_PASSPHRASE,
                                     torture_get_testkey_passphrase(),
                                     NULL,
                                     NULL,
                                     &privkey);
    assert_true(rc == 0);
    assert_non_null(privkey);

    rc = ssh_key_cmp(origkey, privkey, SSH_KEY_CMP_PRIVATE);
    assert_true(rc == 0);

    ssh_key_free(origkey);
    ssh_key_free(privkey);
}
#endif /* HAVE_LIBCRYPTO */

static void torture_pki_rsa_import_privkey_base64_passphrase(void **state)
{
    int rc;
    ssh_key key = NULL;
    const char *passphrase = torture_get_testkey_passphrase();

    (void) state; /* unused */


    rc = ssh_pki_import_privkey_base64(torture_get_testkey(SSH_KEYTYPE_RSA, 0, 1),
                                       passphrase,
                                       NULL,
                                       NULL,
                                       &key);
    assert_return_code(rc, errno);

    rc = ssh_key_is_private(key);
    assert_true(rc == 1);

    ssh_key_free(key);
    key = NULL;

    /* test if it returns -1 if passphrase is wrong */
    rc = ssh_pki_import_privkey_base64(torture_get_testkey(SSH_KEYTYPE_RSA, 0, 1),
                                       "wrong passphrase !!",
                                       NULL,
                                       NULL,
                                       &key);
    assert_true(rc == -1);
    ssh_key_free(key);
    key = NULL;

#ifndef HAVE_LIBCRYPTO
    /* test if it returns -1 if passphrase is NULL */
    /* libcrypto asks for a passphrase, so skip this test */
    rc = ssh_pki_import_privkey_base64(torture_get_testkey(SSH_KEYTYPE_RSA, 0, 1),
                                       NULL,
                                       NULL,
                                       NULL,
                                       &key);
    assert_true(rc == -1);
    ssh_key_free(key);
    key = NULL;
#endif
}

static void
torture_pki_rsa_import_openssh_privkey_base64_passphrase(void **state)
{
    int rc;
    ssh_key key = NULL;
    const char *passphrase = torture_get_testkey_passphrase();
    const char *keystring = NULL;

    (void) state; /* unused */

    keystring = torture_get_openssh_testkey(SSH_KEYTYPE_RSA, 0, 1);
    assert_true(keystring != NULL);

    rc = ssh_pki_import_privkey_base64(keystring,
                                       passphrase,
                                       NULL,
                                       NULL,
                                       &key);
    assert_return_code(rc, errno);

    rc = ssh_key_is_private(key);
    assert_true(rc == 1);

    ssh_key_free(key);
    key = NULL;

    /* test if it returns -1 if passphrase is wrong */
    rc = ssh_pki_import_privkey_base64(keystring,
                                       "wrong passphrase !!",
                                       NULL,
                                       NULL,
                                       &key);
    assert_true(rc == -1);
    ssh_key_free(key);
    key = NULL;

    /* test if it returns -1 if passphrase is NULL */
    /* libcrypto asks for a passphrase, so skip this test */
    rc = ssh_pki_import_privkey_base64(keystring,
                                       NULL,
                                       NULL,
                                       NULL,
                                       &key);
    assert_true(rc == -1);
    ssh_key_free(key);
    key = NULL;
}

int torture_run_tests(void) {
    int rc;
    struct CMUnitTest tests[] = {
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_pubkey_file,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_pubkey_from_openssh_privkey,
                                        setup_rsa_openssh_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_privkey_base64_NULL_key,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_privkey_base64_NULL_str,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_privkey_base64,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_privkey_base64,
                                        setup_rsa_openssh_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_publickey_from_privatekey,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test(torture_pki_rsa_import_privkey_base64_passphrase),
        cmocka_unit_test(torture_pki_rsa_import_openssh_privkey_base64_passphrase),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_copy_cert_to_privkey,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_import_cert_file,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_publickey_base64,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_generate_pubkey_from_privkey,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test_setup_teardown(torture_pki_rsa_duplicate_key,
                                        setup_rsa_key,
                                        teardown),
        cmocka_unit_test(torture_pki_rsa_generate_key),
#ifdef HAVE_LIBCRYPTO
        cmocka_unit_test_setup_teardown(torture_pki_rsa_write_privkey,
                                        setup_rsa_key,
                                        teardown),
#endif /* HAVE_LIBCRYPTO */
        cmocka_unit_test(torture_pki_rsa_sha2),
    };

    ssh_init();
    torture_filter_tests(tests);
    rc = cmocka_run_group_tests(tests, NULL, NULL);
    ssh_finalize();
    return rc;
}