diff options
| -rw-r--r-- | src/config.c | 8 | ||||
| -rw-r--r-- | src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c | 13 | ||||
| -rw-r--r-- | src/crypto/cipher/blowfish_ctr/builtin/blowfish_ctr.c | 13 | ||||
| -rw-r--r-- | src/crypto/cipher/null/memcpy/null_memcpy.c | 14 | ||||
| -rw-r--r-- | src/crypto/mac/ghash/builtin/ghash_builtin.c | 7 | ||||
| -rw-r--r-- | src/fastd.h | 16 | ||||
| -rw-r--r-- | src/methods/cipher_test/cipher_test.c | 41 | ||||
| -rw-r--r-- | src/methods/generic_gcm/generic_gcm.c | 47 | ||||
| -rw-r--r-- | src/methods/generic_gmac/generic_gmac.c | 67 | ||||
| -rw-r--r-- | src/methods/generic_poly1305/generic_poly1305.c | 41 | ||||
| -rw-r--r-- | src/methods/null/null.c | 12 | ||||
| -rw-r--r-- | src/methods/xsalsa20_poly1305/xsalsa20_poly1305.c | 20 | ||||
| -rw-r--r-- | src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.c | 2 |
13 files changed, 94 insertions, 207 deletions
diff --git a/src/config.c b/src/config.c index 9f8fab7..5e5c131 100644 --- a/src/config.c +++ b/src/config.c @@ -488,10 +488,10 @@ static void configure_method_parameters(fastd_context_t *ctx, fastd_config_t *co const fastd_method_t *method = fastd_method_get_by_name(method_name->str); conf->max_packet_size = max_size_t(conf->max_packet_size, method->max_packet_size(ctx)); - conf->min_encrypt_head_space = max_size_t(conf->min_encrypt_head_space, method->min_encrypt_head_space(ctx)); - conf->min_decrypt_head_space = max_size_t(conf->min_decrypt_head_space, method->min_decrypt_head_space(ctx)); - conf->min_encrypt_tail_space = max_size_t(conf->min_encrypt_tail_space, method->min_encrypt_tail_space(ctx)); - conf->min_decrypt_tail_space = max_size_t(conf->min_decrypt_tail_space, method->min_decrypt_tail_space(ctx)); + conf->min_encrypt_head_space = max_size_t(conf->min_encrypt_head_space, method->min_encrypt_head_space); + conf->min_decrypt_head_space = max_size_t(conf->min_decrypt_head_space, method->min_decrypt_head_space); + conf->min_encrypt_tail_space = max_size_t(conf->min_encrypt_tail_space, method->min_encrypt_tail_space); + conf->min_decrypt_tail_space = max_size_t(conf->min_decrypt_tail_space, method->min_decrypt_tail_space); } conf->min_encrypt_head_space = alignto(conf->min_encrypt_head_space, 16); diff --git a/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c b/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c index 5cb4bc7..7c75b7d 100644 --- a/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c +++ b/src/crypto/cipher/aes128_ctr/nacl/cipher_aes128_ctr_nacl.c @@ -37,10 +37,6 @@ static fastd_cipher_context_t* aes128_ctr_initialize(fastd_context_t *ctx UNUSED return NULL; } -static size_t aes128_ctr_key_length(fastd_context_t *ctx UNUSED, const fastd_cipher_context_t *cctx UNUSED) { - return 16; -} - static fastd_cipher_state_t* aes128_ctr_init_state(fastd_context_t *ctx, const fastd_cipher_context_t *cctx UNUSED, const uint8_t *key) { fastd_block128_t k; memcpy(k.b, key, sizeof(fastd_block128_t)); @@ -55,10 +51,6 @@ static fastd_cipher_state_t* aes128_ctr_init_state(fastd_context_t *ctx, const f return state; } -static size_t aes128_ctr_iv_length(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state UNUSED) { - return 16; -} - static bool aes128_ctr_crypt(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv) { crypto_stream_aes128ctr_xor_afternm(out->b, in->b, len, iv, state->d); return true; @@ -76,13 +68,12 @@ static void aes128_ctr_free(fastd_context_t *ctx UNUSED, fastd_cipher_context_t const fastd_cipher_t fastd_cipher_aes128_ctr_nacl = { .name = "nacl", + .key_length = 16, + .iv_length = 16, .initialize = aes128_ctr_initialize, - - .key_length = aes128_ctr_key_length, .init_state = aes128_ctr_init_state, - .iv_length = aes128_ctr_iv_length, .crypt = aes128_ctr_crypt, .free_state = aes128_ctr_free_state, diff --git a/src/crypto/cipher/blowfish_ctr/builtin/blowfish_ctr.c b/src/crypto/cipher/blowfish_ctr/builtin/blowfish_ctr.c index d874e72..d657694 100644 --- a/src/crypto/cipher/blowfish_ctr/builtin/blowfish_ctr.c +++ b/src/crypto/cipher/blowfish_ctr/builtin/blowfish_ctr.c @@ -179,10 +179,6 @@ static fastd_cipher_context_t* blowfish_ctr_initialize(fastd_context_t *ctx UNUS return NULL; } -static size_t blowfish_ctr_key_length(fastd_context_t *ctx UNUSED, const fastd_cipher_context_t *cctx UNUSED) { - return 56; -} - static inline void bf_ntohl(uint32_t *v, size_t len) { size_t i; @@ -243,10 +239,6 @@ static fastd_cipher_state_t* blowfish_ctr_init_state(fastd_context_t *ctx UNUSED return state; } -static size_t blowfish_ctr_iv_length(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state UNUSED) { - return 8; -} - static bool blowfish_ctr_crypt(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv) { register uint32_t ctr[2]; register uint32_t block[2]; @@ -283,13 +275,12 @@ static void blowfish_ctr_free(fastd_context_t *ctx UNUSED, fastd_cipher_context_ const fastd_cipher_t fastd_cipher_blowfish_ctr_builtin = { .name = "builtin", + .key_length = 56, + .iv_length = 8, .initialize = blowfish_ctr_initialize, - - .key_length = blowfish_ctr_key_length, .init_state = blowfish_ctr_init_state, - .iv_length = blowfish_ctr_iv_length, .crypt = blowfish_ctr_crypt, .free_state = blowfish_ctr_free_state, diff --git a/src/crypto/cipher/null/memcpy/null_memcpy.c b/src/crypto/cipher/null/memcpy/null_memcpy.c index e3b86ca..c260ffb 100644 --- a/src/crypto/cipher/null/memcpy/null_memcpy.c +++ b/src/crypto/cipher/null/memcpy/null_memcpy.c @@ -31,19 +31,10 @@ static fastd_cipher_context_t* null_initialize(fastd_context_t *ctx UNUSED) { return NULL; } -static size_t null_key_length(fastd_context_t *ctx UNUSED, const fastd_cipher_context_t *cctx UNUSED) { - return 0; -} - - static fastd_cipher_state_t* null_init_state(fastd_context_t *ctx UNUSED, const fastd_cipher_context_t *cctx UNUSED, const uint8_t *key UNUSED) { return NULL; } -static size_t null_iv_length(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state UNUSED) { - return 0; -} - static bool null_memcpy(fastd_context_t *ctx UNUSED, const fastd_cipher_state_t *state UNUSED, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv UNUSED) { memcpy(out, in, len); return true; @@ -57,13 +48,12 @@ static void null_free(fastd_context_t *ctx UNUSED, fastd_cipher_context_t *cctx const fastd_cipher_t fastd_cipher_null_memcpy = { .name = "memcpy", + .key_length = 0, + .iv_length = 0, .initialize = null_initialize, - - .key_length = null_key_length, .init_state = null_init_state, - .iv_length = null_iv_length, .crypt = null_memcpy, .free_state = null_free_state, diff --git a/src/crypto/mac/ghash/builtin/ghash_builtin.c b/src/crypto/mac/ghash/builtin/ghash_builtin.c index a243b2a..8793627 100644 --- a/src/crypto/mac/ghash/builtin/ghash_builtin.c +++ b/src/crypto/mac/ghash/builtin/ghash_builtin.c @@ -65,10 +65,6 @@ static fastd_mac_context_t* ghash_initialize(fastd_context_t *ctx UNUSED) { return NULL; } -static size_t ghash_key_length(fastd_context_t *ctx UNUSED, const fastd_mac_context_t *cctx UNUSED) { - return sizeof(fastd_block128_t); -} - static fastd_mac_state_t* ghash_init_state(fastd_context_t *ctx UNUSED, const fastd_mac_context_t *mctx UNUSED, const uint8_t *key) { fastd_mac_state_t *state = malloc(sizeof(fastd_mac_state_t)); @@ -137,10 +133,9 @@ static void ghash_free(fastd_context_t *ctx UNUSED, fastd_mac_context_t *mctx UN const fastd_mac_t fastd_mac_ghash_builtin = { .name = "builtin", + .key_length = sizeof(fastd_block128_t), .initialize = ghash_initialize, - - .key_length = ghash_key_length, .init_state = ghash_init_state, .hash = ghash_hash, diff --git a/src/fastd.h b/src/fastd.h index 5354871..2536e71 100644 --- a/src/fastd.h +++ b/src/fastd.h @@ -82,10 +82,10 @@ struct fastd_method { bool (*provides)(const char *name); size_t (*max_packet_size)(fastd_context_t *ctx); - size_t (*min_encrypt_head_space)(fastd_context_t *ctx); - size_t (*min_decrypt_head_space)(fastd_context_t *ctx); - size_t (*min_encrypt_tail_space)(fastd_context_t *ctx); - size_t (*min_decrypt_tail_space)(fastd_context_t *ctx); + size_t min_encrypt_head_space; + size_t min_decrypt_head_space; + size_t min_encrypt_tail_space; + size_t min_decrypt_tail_space; size_t (*key_length)(fastd_context_t *ctx, const char *name); fastd_method_session_state_t* (*session_init)(fastd_context_t *ctx, const char *name, const uint8_t *secret, bool initiator); @@ -102,13 +102,12 @@ struct fastd_method { struct fastd_cipher { const char *name; + size_t key_length; + size_t iv_length; fastd_cipher_context_t* (*initialize)(fastd_context_t *ctx); - - size_t (*key_length)(fastd_context_t *ctx, const fastd_cipher_context_t *cctx); fastd_cipher_state_t* (*init_state)(fastd_context_t *ctx, const fastd_cipher_context_t *cctx, const uint8_t *key); - size_t (*iv_length)(fastd_context_t *ctx, const fastd_cipher_state_t *state); bool (*crypt)(fastd_context_t *ctx, const fastd_cipher_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv); void (*free_state)(fastd_context_t *ctx, fastd_cipher_state_t *state); @@ -117,10 +116,9 @@ struct fastd_cipher { struct fastd_mac { const char *name; + size_t key_length; fastd_mac_context_t* (*initialize)(fastd_context_t *ctx); - - size_t (*key_length)(fastd_context_t *ctx, const fastd_mac_context_t *mctx); fastd_mac_state_t* (*init_state)(fastd_context_t *ctx, const fastd_mac_context_t *mctx, const uint8_t *key); bool (*hash)(fastd_context_t *ctx, const fastd_mac_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t n_blocks); diff --git a/src/methods/cipher_test/cipher_test.c b/src/methods/cipher_test/cipher_test.c index 9f0b600..050e2a5 100644 --- a/src/methods/cipher_test/cipher_test.c +++ b/src/methods/cipher_test/cipher_test.c @@ -34,7 +34,6 @@ struct fastd_method_session_state { const fastd_cipher_t *cipher; const fastd_cipher_context_t *cipher_ctx; fastd_cipher_state_t *cipher_state; - size_t ivlen; }; @@ -70,22 +69,13 @@ static size_t method_max_packet_size(fastd_context_t *ctx) { } -static size_t method_min_head_space(fastd_context_t *ctx UNUSED) { - return 0; -} - -static size_t method_min_tail_space(fastd_context_t *ctx UNUSED) { - return (sizeof(fastd_block128_t)-1); -} - - static size_t method_key_length(fastd_context_t *ctx, const char *name) { const fastd_cipher_t *cipher = NULL; const fastd_cipher_context_t *cctx; if (!cipher_get(ctx, name, &cipher, &cctx)) exit_bug(ctx, "cipher-test: can't get cipher key length"); - return cipher->key_length(ctx, cctx); + return cipher->key_length; } static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, const char *name, const uint8_t *secret, bool initiator) { @@ -97,7 +87,6 @@ static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, c exit_bug(ctx, "cipher-test: can't instanciate cipher"); session->cipher_state = session->cipher->init_state(ctx, session->cipher_ctx, secret); - session->ivlen = session->cipher->iv_length(ctx, session->cipher_state); pr_warn(ctx, "using cipher-test method; this method must be used for testing and benchmarks only"); @@ -134,11 +123,11 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast if (tail_len) memset(in.data+in.len, 0, tail_len); - uint8_t nonce[session->ivlen]; - if (session->ivlen) { - memset(nonce, 0, session->ivlen); - memcpy(nonce, session->common.send_nonce, min_size_t(COMMON_NONCEBYTES, session->ivlen)); - nonce[session->ivlen-1] = 1; + uint8_t nonce[session->cipher->iv_length]; + if (session->cipher->iv_length) { + memset(nonce, 0, session->cipher->iv_length); + memcpy(nonce, session->common.send_nonce, min_size_t(COMMON_NONCEBYTES, session->cipher->iv_length)); + nonce[session->cipher->iv_length-1] = 1; } int n_blocks = block_count(in.len, sizeof(fastd_block128_t)); @@ -177,11 +166,11 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho if (common_nonce[COMMON_NONCEBYTES]) /* flags */ return false; - uint8_t nonce[session->ivlen]; - if (session->ivlen) { - memset(nonce, 0, session->ivlen); - memcpy(nonce, common_nonce, min_size_t(COMMON_NONCEBYTES, session->ivlen)); - nonce[session->ivlen-1] = 1; + uint8_t nonce[session->cipher->iv_length]; + if (session->cipher->iv_length) { + memset(nonce, 0, session->cipher->iv_length); + memcpy(nonce, common_nonce, min_size_t(COMMON_NONCEBYTES, session->cipher->iv_length)); + nonce[session->cipher->iv_length-1] = 1; } int64_t age; @@ -219,10 +208,10 @@ const fastd_method_t fastd_method_cipher_test = { .provides = method_provides, .max_packet_size = method_max_packet_size, - .min_encrypt_head_space = method_min_head_space, - .min_decrypt_head_space = method_min_head_space, - .min_encrypt_tail_space = method_min_tail_space, - .min_decrypt_tail_space = method_min_tail_space, + .min_encrypt_head_space = 0, + .min_decrypt_head_space = 0, + .min_encrypt_tail_space = sizeof(fastd_block128_t)-1, + .min_decrypt_tail_space = sizeof(fastd_block128_t)-1, .key_length = method_key_length, .session_init = method_session_init, diff --git a/src/methods/generic_gcm/generic_gcm.c b/src/methods/generic_gcm/generic_gcm.c index 9c31ec4..a35a6c9 100644 --- a/src/methods/generic_gcm/generic_gcm.c +++ b/src/methods/generic_gcm/generic_gcm.c @@ -34,7 +34,6 @@ struct fastd_method_session_state { const fastd_cipher_t *cipher; const fastd_cipher_context_t *cipher_ctx; fastd_cipher_state_t *cipher_state; - size_t ivlen; const fastd_mac_t *ghash; const fastd_mac_context_t *ghash_ctx; @@ -77,30 +76,13 @@ static size_t method_max_packet_size(fastd_context_t *ctx) { } -static size_t method_min_encrypt_head_space(fastd_context_t *ctx UNUSED) { - return sizeof(fastd_block128_t); -} - -static size_t method_min_decrypt_head_space(fastd_context_t *ctx UNUSED) { - return 0; -} - -static size_t method_min_encrypt_tail_space(fastd_context_t *ctx UNUSED) { - return (sizeof(fastd_block128_t)-1); -} - -static size_t method_min_decrypt_tail_space(fastd_context_t *ctx UNUSED) { - return (2*sizeof(fastd_block128_t)-1); -} - - static size_t method_key_length(fastd_context_t *ctx, const char *name) { const fastd_cipher_t *cipher = NULL; const fastd_cipher_context_t *cctx; if (!cipher_get(ctx, name, &cipher, &cctx)) exit_bug(ctx, "generic-gcm: can't get cipher key length"); - return cipher->key_length(ctx, cctx); + return cipher->key_length; } static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, const char *name, const uint8_t *secret, bool initiator) { @@ -116,12 +98,11 @@ static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, c static const fastd_block128_t zeroblock = {}; fastd_block128_t H; - session->ivlen = session->cipher->iv_length(ctx, session->cipher_state); - if (session->ivlen <= COMMON_NONCEBYTES) + if (session->cipher->iv_length <= COMMON_NONCEBYTES) exit_bug(ctx, "generic-gcm: iv_length to small"); - uint8_t zeroiv[session->ivlen]; - memset(zeroiv, 0, session->ivlen); + uint8_t zeroiv[session->cipher->iv_length]; + memset(zeroiv, 0, session->cipher->iv_length); session->cipher->crypt(ctx, session->cipher_state, &H, &zeroblock, sizeof(fastd_block128_t), zeroiv); @@ -185,10 +166,10 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast if (tail_len) memset(in.data+in.len, 0, tail_len); - uint8_t nonce[session->ivlen]; - memset(nonce, 0, session->ivlen); + uint8_t nonce[session->cipher->iv_length]; + memset(nonce, 0, session->cipher->iv_length); memcpy(nonce, session->common.send_nonce, COMMON_NONCEBYTES); - nonce[session->ivlen-1] = 1; + nonce[session->cipher->iv_length-1] = 1; int n_blocks = block_count(in.len, sizeof(fastd_block128_t)); @@ -238,10 +219,10 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho if (((const uint8_t*)in.data)[COMMON_NONCEBYTES]) /* flags */ return false; - uint8_t nonce[session->ivlen]; - memset(nonce, 0, session->ivlen); + uint8_t nonce[session->cipher->iv_length]; + memset(nonce, 0, session->cipher->iv_length); memcpy(nonce, in.data, COMMON_NONCEBYTES); - nonce[session->ivlen-1] = 1; + nonce[session->cipher->iv_length-1] = 1; int64_t age; if (!fastd_method_is_nonce_valid(ctx, &session->common, nonce, &age)) @@ -290,10 +271,10 @@ const fastd_method_t fastd_method_generic_gcm = { .provides = method_provides, .max_packet_size = method_max_packet_size, - .min_encrypt_head_space = method_min_encrypt_head_space, - .min_decrypt_head_space = method_min_decrypt_head_space, - .min_encrypt_tail_space = method_min_encrypt_tail_space, - .min_decrypt_tail_space = method_min_decrypt_tail_space, + .min_encrypt_head_space = sizeof(fastd_block128_t), + .min_decrypt_head_space = 0, + .min_encrypt_tail_space = sizeof(fastd_block128_t)-1, + .min_decrypt_tail_space = 2*sizeof(fastd_block128_t)-1, .key_length = method_key_length, .session_init = method_session_init, diff --git a/src/methods/generic_gmac/generic_gmac.c b/src/methods/generic_gmac/generic_gmac.c index c3ad0e6..71ee898 100644 --- a/src/methods/generic_gmac/generic_gmac.c +++ b/src/methods/generic_gmac/generic_gmac.c @@ -36,12 +36,10 @@ struct fastd_method_session_state { const fastd_cipher_t *cipher; const fastd_cipher_context_t *cipher_ctx; fastd_cipher_state_t *cipher_state; - size_t ivlen; const fastd_cipher_t *gmac_cipher; const fastd_cipher_context_t *gmac_cipher_ctx; fastd_cipher_state_t *gmac_cipher_state; - size_t gmac_ivlen; const fastd_mac_t *ghash; const fastd_mac_context_t *ghash_ctx; @@ -93,19 +91,6 @@ static size_t method_max_packet_size(fastd_context_t *ctx) { } -static size_t method_min_head_space(fastd_context_t *ctx UNUSED) { - return 0; -} - -static size_t method_min_encrypt_tail_space(fastd_context_t *ctx UNUSED) { - return (sizeof(fastd_block128_t)-1); -} - -static size_t method_min_decrypt_tail_space(fastd_context_t *ctx UNUSED) { - return (2*sizeof(fastd_block128_t)-1); -} - - static size_t method_key_length(fastd_context_t *ctx, const char *name) { const fastd_cipher_t *cipher = NULL; const fastd_cipher_context_t *cctx; @@ -116,7 +101,7 @@ static size_t method_key_length(fastd_context_t *ctx, const char *name) { if (!cipher_get(ctx, name, &cipher, &cctx, &gmac_cipher, &gmac_cctx)) exit_bug(ctx, "generic-gmac: can't get cipher key length"); - return cipher->key_length(ctx, cctx) + gmac_cipher->key_length(ctx, gmac_cctx); + return cipher->key_length + gmac_cipher->key_length; } static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, const char *name, const uint8_t *secret, bool initiator) { @@ -128,19 +113,17 @@ static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, c exit_bug(ctx, "generic-gmac: can't instanciate cipher"); session->cipher_state = session->cipher->init_state(ctx, session->cipher_ctx, secret); - session->ivlen = session->cipher->iv_length(ctx, session->cipher_state); - if (session->ivlen && session->ivlen <= COMMON_NONCEBYTES) + if (session->cipher->iv_length && session->cipher->iv_length <= COMMON_NONCEBYTES) exit_bug(ctx, "generic-gmac: iv_length to small"); - session->gmac_cipher_state = session->gmac_cipher->init_state(ctx, session->gmac_cipher_ctx, secret + session->cipher->key_length(ctx, session->cipher_ctx)); - session->gmac_ivlen = session->gmac_cipher->iv_length(ctx, session->gmac_cipher_state); - if (session->gmac_ivlen <= COMMON_NONCEBYTES) - exit_bug(ctx, "generic-gmac: gmac cipher iv_length to small"); + session->gmac_cipher_state = session->gmac_cipher->init_state(ctx, session->gmac_cipher_ctx, secret + session->cipher->key_length); + if (session->gmac_cipher->iv_length <= COMMON_NONCEBYTES) + exit_bug(ctx, "generic-gmac: GMAC cipher iv_length to small"); fastd_block128_t H; - uint8_t zeroiv[session->gmac_ivlen]; - memset(zeroiv, 0, session->gmac_ivlen); + uint8_t zeroiv[session->gmac_cipher->iv_length]; + memset(zeroiv, 0, session->gmac_cipher->iv_length); session->gmac_cipher->crypt(ctx, session->gmac_cipher_state, &H, &ZERO_BLOCK, sizeof(fastd_block128_t), zeroiv); @@ -201,19 +184,19 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast fastd_block128_t *outblocks = out->data; fastd_block128_t sig; - uint8_t gmac_nonce[session->gmac_ivlen]; - memset(gmac_nonce, 0, session->gmac_ivlen); + uint8_t gmac_nonce[session->gmac_cipher->iv_length]; + memset(gmac_nonce, 0, session->gmac_cipher->iv_length); memcpy(gmac_nonce, session->common.send_nonce, COMMON_NONCEBYTES); - gmac_nonce[session->gmac_ivlen-1] = 1; + gmac_nonce[session->gmac_cipher->iv_length-1] = 1; bool ok = session->gmac_cipher->crypt(ctx, session->gmac_cipher_state, outblocks, &ZERO_BLOCK, sizeof(fastd_block128_t), gmac_nonce); if (ok) { - uint8_t nonce[session->ivlen]; - if (session->ivlen) { - memset(nonce, 0, session->ivlen); + uint8_t nonce[session->cipher->iv_length]; + if (session->cipher->iv_length) { + memset(nonce, 0, session->cipher->iv_length); memcpy(nonce, session->common.send_nonce, COMMON_NONCEBYTES); - nonce[session->ivlen-1] = 1; + nonce[session->cipher->iv_length-1] = 1; } ok = session->cipher->crypt(ctx, session->cipher_state, outblocks+1, inblocks, n_blocks*sizeof(fastd_block128_t), nonce); @@ -263,16 +246,16 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho if (!fastd_method_is_nonce_valid(ctx, &session->common, common_nonce, &age)) return false; - uint8_t gmac_nonce[session->gmac_ivlen]; - memset(gmac_nonce, 0, session->gmac_ivlen); + uint8_t gmac_nonce[session->gmac_cipher->iv_length]; + memset(gmac_nonce, 0, session->gmac_cipher->iv_length); memcpy(gmac_nonce, common_nonce, COMMON_NONCEBYTES); - gmac_nonce[session->gmac_ivlen-1] = 1; + gmac_nonce[session->gmac_cipher->iv_length-1] = 1; - uint8_t nonce[session->ivlen]; - if (session->ivlen) { - memset(nonce, 0, session->ivlen); + uint8_t nonce[session->cipher->iv_length]; + if (session->cipher->iv_length) { + memset(nonce, 0, session->cipher->iv_length); memcpy(nonce, common_nonce, COMMON_NONCEBYTES); - nonce[session->ivlen-1] = 1; + nonce[session->cipher->iv_length-1] = 1; } fastd_buffer_push_head(ctx, &in, COMMON_HEADBYTES); @@ -321,10 +304,10 @@ const fastd_method_t fastd_method_generic_gmac = { .provides = method_provides, .max_packet_size = method_max_packet_size, - .min_encrypt_head_space = method_min_head_space, - .min_decrypt_head_space = method_min_head_space, - .min_encrypt_tail_space = method_min_encrypt_tail_space, - .min_decrypt_tail_space = method_min_decrypt_tail_space, + .min_encrypt_head_space = 0, + .min_decrypt_head_space = 0, + .min_encrypt_tail_space = sizeof(fastd_block128_t)-1, + .min_decrypt_tail_space = 2*sizeof(fastd_block128_t)-1, .key_length = method_key_length, .session_init = method_session_init, diff --git a/src/methods/generic_poly1305/generic_poly1305.c b/src/methods/generic_poly1305/generic_poly1305.c index fdad118..588e294 100644 --- a/src/methods/generic_poly1305/generic_poly1305.c +++ b/src/methods/generic_poly1305/generic_poly1305.c @@ -30,7 +30,7 @@ #include <crypto_onetimeauth_poly1305.h> -#define AUTHBLOCKS (block_count(crypto_onetimeauth_poly1305_KEYBYTES, sizeof(fastd_block128_t))) +#define AUTHBLOCKS 2 struct fastd_method_session_state { @@ -39,7 +39,6 @@ struct fastd_method_session_state { const fastd_cipher_t *cipher; const fastd_cipher_context_t *cipher_ctx; fastd_cipher_state_t *cipher_state; - size_t ivlen; }; @@ -74,26 +73,13 @@ static size_t method_max_packet_size(fastd_context_t *ctx) { return (fastd_max_packet_size(ctx) + COMMON_HEADBYTES + crypto_onetimeauth_poly1305_BYTES); } -static size_t method_min_encrypt_head_space(fastd_context_t *ctx UNUSED) { - return AUTHBLOCKS*sizeof(fastd_block128_t); -} - -static size_t method_min_decrypt_head_space(fastd_context_t *ctx UNUSED) { - return AUTHBLOCKS*sizeof(fastd_block128_t) - crypto_onetimeauth_poly1305_BYTES; -} - -static size_t method_min_tail_space(fastd_context_t *ctx UNUSED) { - return (sizeof(fastd_block128_t)-1); -} - - static size_t method_key_length(fastd_context_t *ctx, const char *name) { const fastd_cipher_t *cipher = NULL; const fastd_cipher_context_t *cctx; if (!cipher_get(ctx, name, &cipher, &cctx)) exit_bug(ctx, "generic-poly1305: can't get cipher key length"); - return cipher->key_length(ctx, cctx); + return cipher->key_length; } static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, const char *name, const uint8_t *secret, bool initiator) { @@ -106,8 +92,7 @@ static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, c session->cipher_state = session->cipher->init_state(ctx, session->cipher_ctx, secret); - session->ivlen = session->cipher->iv_length(ctx, session->cipher_state); - if (session->ivlen <= COMMON_NONCEBYTES) + if (session->cipher->iv_length <= COMMON_NONCEBYTES) exit_bug(ctx, "generic-poly1305: iv_length to small"); return session; @@ -146,10 +131,10 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast if (tail_len) memset(in.data+in.len, 0, tail_len); - uint8_t nonce[session->ivlen]; - memset(nonce, 0, session->ivlen); + uint8_t nonce[session->cipher->iv_length]; + memset(nonce, 0, session->cipher->iv_length); memcpy(nonce, session->common.send_nonce, COMMON_NONCEBYTES); - nonce[session->ivlen-1] = 1; + nonce[session->cipher->iv_length-1] = 1; int n_blocks = block_count(in.len, sizeof(fastd_block128_t)); @@ -193,10 +178,10 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho if (((const uint8_t*)in.data)[COMMON_NONCEBYTES]) /* flags */ return false; - uint8_t nonce[session->ivlen]; - memset(nonce, 0, session->ivlen); + uint8_t nonce[session->cipher->iv_length]; + memset(nonce, 0, session->cipher->iv_length); memcpy(nonce, in.data, COMMON_NONCEBYTES); - nonce[session->ivlen-1] = 1; + nonce[session->cipher->iv_length-1] = 1; int64_t age; if (!fastd_method_is_nonce_valid(ctx, &session->common, nonce, &age)) @@ -255,10 +240,10 @@ const fastd_method_t fastd_method_generic_poly1305 = { .provides = method_provides, .max_packet_size = method_max_packet_size, - .min_encrypt_head_space = method_min_encrypt_head_space, - .min_decrypt_head_space = method_min_decrypt_head_space, - .min_encrypt_tail_space = method_min_tail_space, - .min_decrypt_tail_space = method_min_tail_space, + .min_encrypt_head_space = AUTHBLOCKS*sizeof(fastd_block128_t), + .min_decrypt_head_space = AUTHBLOCKS*sizeof(fastd_block128_t) - crypto_onetimeauth_poly1305_BYTES, + .min_encrypt_tail_space = sizeof(fastd_block128_t)-1, + .min_decrypt_tail_space = sizeof(fastd_block128_t)-1, .key_length = method_key_length, .session_init = method_session_init, diff --git a/src/methods/null/null.c b/src/methods/null/null.c index 6874124..1b50cfb 100644 --- a/src/methods/null/null.c +++ b/src/methods/null/null.c @@ -41,10 +41,6 @@ static size_t method_max_packet_size(fastd_context_t *ctx) { return fastd_max_packet_size(ctx); } -static size_t method_min_head_tail_space(fastd_context_t *ctx UNUSED) { - return 0; -} - static size_t method_key_length(fastd_context_t *ctx UNUSED, const char *name UNUSED) { return 0; } @@ -91,10 +87,10 @@ const fastd_method_t fastd_method_null = { .provides = method_provides, .max_packet_size = method_max_packet_size, - .min_encrypt_head_space = method_min_head_tail_space, - .min_decrypt_head_space = method_min_head_tail_space, - .min_encrypt_tail_space = method_min_head_tail_space, - .min_decrypt_tail_space = method_min_head_tail_space, + .min_encrypt_head_space = 0, + .min_decrypt_head_space = 0, + .min_encrypt_tail_space = 0, + .min_decrypt_tail_space = 0, .key_length = method_key_length, .session_init = method_session_init, diff --git a/src/methods/xsalsa20_poly1305/xsalsa20_poly1305.c b/src/methods/xsalsa20_poly1305/xsalsa20_poly1305.c index 01c623a..f55db76 100644 --- a/src/methods/xsalsa20_poly1305/xsalsa20_poly1305.c +++ b/src/methods/xsalsa20_poly1305/xsalsa20_poly1305.c @@ -45,18 +45,6 @@ static size_t method_max_packet_size(fastd_context_t *ctx) { return (fastd_max_packet_size(ctx) + COMMON_HEADBYTES + crypto_secretbox_xsalsa20poly1305_ZEROBYTES - crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES); } -static size_t method_min_encrypt_head_space(fastd_context_t *ctx UNUSED) { - return crypto_secretbox_xsalsa20poly1305_ZEROBYTES; -} - -static size_t method_min_decrypt_head_space(fastd_context_t *ctx UNUSED) { - return (crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES - COMMON_HEADBYTES); -} - -static size_t method_min_tail_space(fastd_context_t *ctx UNUSED) { - return 0; -} - static size_t method_key_length(fastd_context_t *ctx UNUSED, const char *name UNUSED) { return crypto_secretbox_xsalsa20poly1305_KEYBYTES; @@ -173,10 +161,10 @@ const fastd_method_t fastd_method_xsalsa20_poly1305 = { .provides = method_provides, .max_packet_size = method_max_packet_size, - .min_encrypt_head_space = method_min_encrypt_head_space, - .min_decrypt_head_space = method_min_decrypt_head_space, - .min_encrypt_tail_space = method_min_tail_space, - .min_decrypt_tail_space = method_min_tail_space, + .min_encrypt_head_space = crypto_secretbox_xsalsa20poly1305_ZEROBYTES, + .min_decrypt_head_space = crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES - COMMON_HEADBYTES, + .min_encrypt_tail_space = 0, + .min_decrypt_tail_space = 0, .key_length = method_key_length, .session_init = method_session_init, diff --git a/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.c b/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.c index 8b79d64..0b3b049 100644 --- a/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.c +++ b/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.c @@ -180,7 +180,7 @@ static void protocol_send(fastd_context_t *ctx, fastd_peer_t *peer, fastd_buffer } void fastd_protocol_ec25519_fhmqvc_send_empty(fastd_context_t *ctx, fastd_peer_t *peer, protocol_session_t *session) { - session_send(ctx, peer, fastd_buffer_alloc(ctx, 0, alignto(session->method->min_encrypt_head_space(ctx), 8), session->method->min_encrypt_tail_space(ctx)), session); + session_send(ctx, peer, fastd_buffer_alloc(ctx, 0, alignto(session->method->min_encrypt_head_space, 8), session->method->min_encrypt_tail_space), session); } const fastd_protocol_t fastd_protocol_ec25519_fhmqvc = { |