diff options
| author | Dimitri Staessens <[email protected]> | 2022-02-25 18:44:12 +0100 |
|---|---|---|
| committer | Sander Vrijders <[email protected]> | 2022-03-03 12:00:54 +0100 |
| commit | f535637a394eecca1af182fb09b175b53e9fbf1f (patch) | |
| tree | f0598166eeac5ff9f1c197c7ee3103703ddc1fd5 /src/lib/crypt.c | |
| parent | f5d642a06f9c1a58197313b32f6b213a152e446f (diff) | |
| download | ouroboros-f535637a394eecca1af182fb09b175b53e9fbf1f.tar.gz ouroboros-f535637a394eecca1af182fb09b175b53e9fbf1f.zip | |
lib: Encrypt bare FRCP messages on encrypted flows
Bare FRCP messages (ACKs without data, Rendez-vous packets) were not
encrypted on encrypted flows, causing the receiver to fail decryption.
Signed-off-by: Dimitri Staessens <[email protected]>
Signed-off-by: Sander Vrijders <[email protected]>
Diffstat (limited to 'src/lib/crypt.c')
| -rw-r--r-- | src/lib/crypt.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/src/lib/crypt.c b/src/lib/crypt.c index 043eae13..e19981bc 100644 --- a/src/lib/crypt.c +++ b/src/lib/crypt.c @@ -217,8 +217,7 @@ static int openssl_encrypt(struct flow * f, in = shm_du_buff_head(sdb); in_sz = shm_du_buff_tail(sdb) - in; - if (in_sz == 0) - return 0; + assert(in_sz > 0); if (random_buffer(iv, IVSZ) < 0) goto fail_iv; @@ -229,11 +228,7 @@ static int openssl_encrypt(struct flow * f, EVP_CIPHER_CTX_reset(f->ctx); - ret = EVP_EncryptInit_ex(f->ctx, - EVP_aes_256_cbc(), - NULL, - f->key, - iv); + ret = EVP_EncryptInit_ex(f->ctx, EVP_aes_256_cbc(), NULL, f->key, iv); if (ret != 1) goto fail_encrypt_init; @@ -287,13 +282,17 @@ static int openssl_decrypt(struct flow * f, int in_sz; int tmp_sz; + in = shm_du_buff_head(sdb); + in_sz = shm_du_buff_tail(sdb) - in; + if (in_sz < IVSZ) + return -ECRYPT; + in = shm_du_buff_head_release(sdb, IVSZ); memcpy(iv, in, IVSZ); in = shm_du_buff_head(sdb); - - in_sz = shm_du_buff_tail(sdb) - shm_du_buff_head(sdb); + in_sz = shm_du_buff_tail(sdb) - in; out = malloc(in_sz); if (out == NULL) @@ -301,11 +300,7 @@ static int openssl_decrypt(struct flow * f, EVP_CIPHER_CTX_reset(f->ctx); - ret = EVP_DecryptInit_ex(f->ctx, - EVP_aes_256_cbc(), - NULL, - f->key, - iv); + ret = EVP_DecryptInit_ex(f->ctx, EVP_aes_256_cbc(), NULL, f->key, iv); if (ret != 1) goto fail_decrypt_init; |