diff options
Diffstat (limited to 'providers')
| -rw-r--r-- | providers/implementations/macs/cmac_prov.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/providers/implementations/macs/cmac_prov.c b/providers/implementations/macs/cmac_prov.c index fc9f911beb..ba89616398 100644 --- a/providers/implementations/macs/cmac_prov.c +++ b/providers/implementations/macs/cmac_prov.c @@ -101,8 +101,12 @@ static void *cmac_dup(void *vsrc) static size_t cmac_size(void *vmacctx) { struct cmac_data_st *macctx = vmacctx; + const EVP_CIPHER_CTX *cipherctx = CMAC_CTX_get0_cipher_ctx(macctx->ctx); - return EVP_CIPHER_CTX_get_block_size(CMAC_CTX_get0_cipher_ctx(macctx->ctx)); + if (EVP_CIPHER_CTX_get0_cipher(cipherctx) == NULL) + return 0; + + return EVP_CIPHER_CTX_get_block_size(cipherctx); } static int cmac_setkey(struct cmac_data_st *macctx, |