When the initialisation vector is randomly generated, its value shall be stored in the FIT together with the encrypted data. The changes allow to store the IV in the FIT also in the case where the key is not stored in the DTB but retrieved somewhere else at runtime.
Signed-off-by: Paul HENRYS paul.henrys_ext@softathome.com --- lib/aes/aes-encrypt.c | 7 +++++++ tools/image-host.c | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/lib/aes/aes-encrypt.c b/lib/aes/aes-encrypt.c index e74e35eaa28..90e1407b4f0 100644 --- a/lib/aes/aes-encrypt.c +++ b/lib/aes/aes-encrypt.c @@ -84,6 +84,13 @@ int image_aes_add_cipher_data(struct image_cipher_info *info, void *keydest, char name[128]; int ret = 0;
+ if (!keydest && !info->ivname) { + /* At least, store the IV in the FIT image */ + ret = fdt_setprop(fit, node_noffset, "iv", + info->iv, info->cipher->iv_len); + goto done; + } + /* Either create or overwrite the named cipher node */ parent = fdt_subnode_offset(keydest, 0, FIT_CIPHER_NODENAME); if (parent == -FDT_ERR_NOTFOUND) { diff --git a/tools/image-host.c b/tools/image-host.c index 49ce7436bb9..3424b8d9a1d 100644 --- a/tools/image-host.c +++ b/tools/image-host.c @@ -535,7 +535,7 @@ fit_image_process_cipher(const char *keydir, void *keydest, void *fit, * size values * And, if needed, write the iv in the FIT file */ - if (keydest) { + if (keydest || (!keydest && !info.ivname)) { ret = info.cipher->add_cipher_data(&info, keydest, fit, node_noffset); if (ret) { fprintf(stderr,