[SCM] Samba Shared Repository - branch master updated
Andreas Schneider
asn at samba.org
Fri Sep 26 18:39:02 UTC 2025
The branch, master has been updated
via 11299ccee30 lib:crypto: Use gnutls_cipher_decrypt3() if possible
via 9742093bf3c lib:crypto: Use gnutls_cipher_encrypt3() if possible
from ebff8568d2a s3/rpc_server/samr: fix CID 1509008 - time_t truncation
https://git.samba.org/?p=samba.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit 11299ccee304e5632197506689ffbb282b7eb11f
Author: Andreas Schneider <asn at samba.org>
Date: Wed Sep 10 10:12:02 2025 +0200
lib:crypto: Use gnutls_cipher_decrypt3() if possible
Signed-off-by: Andreas Schneider <asn at samba.org>
Reviewed-by: Stefan Metzmacher <metze at samba.org>
Autobuild-User(master): Andreas Schneider <asn at cryptomilk.org>
Autobuild-Date(master): Fri Sep 26 18:38:57 UTC 2025 on atb-devel-224
commit 9742093bf3c3434cf2819d13429386780de8f174
Author: Andreas Schneider <asn at samba.org>
Date: Wed Sep 10 10:07:40 2025 +0200
lib:crypto: Use gnutls_cipher_encrypt3() if possible
Signed-off-by: Andreas Schneider <asn at samba.org>
Reviewed-by: Stefan Metzmacher <metze at samba.org>
-----------------------------------------------------------------------
Summary of changes:
lib/crypto/gnutls_aead_aes_256_cbc_hmac_sha512.c | 97 ++++++++++++++++++------
wscript_configure_system_gnutls | 3 +
2 files changed, 78 insertions(+), 22 deletions(-)
Changeset truncated at 500 lines:
diff --git a/lib/crypto/gnutls_aead_aes_256_cbc_hmac_sha512.c b/lib/crypto/gnutls_aead_aes_256_cbc_hmac_sha512.c
index 2e37dcd23aa..97f09f827ba 100644
--- a/lib/crypto/gnutls_aead_aes_256_cbc_hmac_sha512.c
+++ b/lib/crypto/gnutls_aead_aes_256_cbc_hmac_sha512.c
@@ -108,8 +108,10 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(TALLOC_CTX *mem_ctx,
uint8_t version_byte = SAMR_AES_VERSION_BYTE;
uint8_t version_byte_len = SAMR_AES_VERSION_BYTE_LEN;
uint8_t auth_data[hmac_size];
+#ifndef HAVE_GNUTLS_CIPHER_ENCRYPT3
DATA_BLOB padded_plaintext;
size_t padding;
+#endif
NTSTATUS status;
int rc;
@@ -124,16 +126,61 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(TALLOC_CTX *mem_ctx,
return NT_STATUS_INVALID_PARAMETER;
}
- /*
- * PKCS#7 padding
- *
- * TODO: Use gnutls_cipher_encrypt3()
- */
-
if (plaintext->length + aes_block_size < plaintext->length) {
return NT_STATUS_INVALID_BUFFER_SIZE;
}
+ status = calculate_enc_key(cek, key_salt, enc_key_data);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ rc = gnutls_cipher_init(&cipher_hnd, cipher_algo, &enc_key, &iv_datum);
+ if (rc < 0) {
+ BURN_DATA(enc_key_data);
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ENCRYPTION_FAILED);
+ }
+
+#ifdef HAVE_GNUTLS_CIPHER_ENCRYPT3
+ /* Figure out the size for the cipher text */
+ rc = gnutls_cipher_encrypt3(cipher_hnd,
+ plaintext->data,
+ plaintext->length,
+ NULL,
+ &cipher_text_len,
+ GNUTLS_CIPHER_PADDING_PKCS7);
+ if (rc < 0) {
+ BURN_DATA(enc_key_data);
+ gnutls_cipher_deinit(cipher_hnd);
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ENCRYPTION_FAILED);
+ }
+
+ cipher_text = talloc_size(mem_ctx, cipher_text_len);
+ if (cipher_text == NULL) {
+ BURN_DATA(enc_key_data);
+ gnutls_cipher_deinit(cipher_hnd);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ rc = gnutls_cipher_encrypt3(cipher_hnd,
+ plaintext->data,
+ plaintext->length,
+ cipher_text,
+ &cipher_text_len,
+ GNUTLS_CIPHER_PADDING_PKCS7);
+ gnutls_cipher_deinit(cipher_hnd);
+ BURN_DATA(enc_key_data);
+ if (rc < 0) {
+ TALLOC_FREE(cipher_text);
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ENCRYPTION_FAILED);
+ }
+#else /* HAVE_GNUTLS_CIPHER_ENCRYPT3 */
+ /*
+ * PKCS#7 padding
+ */
padded_plaintext.length =
aes_block_size * (plaintext->length / aes_block_size) +
aes_block_size;
@@ -143,6 +190,8 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(TALLOC_CTX *mem_ctx,
padded_plaintext =
data_blob_talloc(mem_ctx, NULL, padded_plaintext.length);
if (padded_plaintext.data == NULL) {
+ BURN_DATA(enc_key_data);
+ gnutls_cipher_deinit(cipher_hnd);
return NT_STATUS_NO_MEMORY;
}
@@ -150,6 +199,8 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(TALLOC_CTX *mem_ctx,
cipher_text_len = padded_plaintext.length;
cipher_text = talloc_size(mem_ctx, cipher_text_len);
if (cipher_text == NULL) {
+ BURN_DATA(enc_key_data);
+ gnutls_cipher_deinit(cipher_hnd);
data_blob_free(&padded_plaintext);
return NT_STATUS_NO_MEMORY;
}
@@ -157,22 +208,6 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(TALLOC_CTX *mem_ctx,
memcpy(padded_plaintext.data, plaintext->data, plaintext->length);
memset(padded_plaintext.data + plaintext->length, padding, padding);
- status = calculate_enc_key(cek, key_salt, enc_key_data);
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_clear_free(&padded_plaintext);
- return status;
- }
-
- /* Encrypt plaintext */
- rc = gnutls_cipher_init(&cipher_hnd, cipher_algo, &enc_key, &iv_datum);
- if (rc < 0) {
- data_blob_clear_free(&padded_plaintext);
- BURN_DATA(enc_key_data);
- TALLOC_FREE(cipher_text);
- return gnutls_error_to_ntstatus(rc,
- NT_STATUS_ENCRYPTION_FAILED);
- }
-
rc = gnutls_cipher_encrypt2(cipher_hnd,
padded_plaintext.data,
padded_plaintext.length,
@@ -186,6 +221,7 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_encrypt(TALLOC_CTX *mem_ctx,
return gnutls_error_to_ntstatus(rc,
NT_STATUS_ENCRYPTION_FAILED);
}
+#endif /* HAVE_GNUTLS_CIPHER_ENCRYPT3 */
/* Calculate mac key */
status = calculate_mac_key(cek, mac_salt, mac_key_data);
@@ -277,8 +313,10 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_decrypt(TALLOC_CTX *mem_ctx,
uint8_t version_byte = SAMR_AES_VERSION_BYTE;
uint8_t version_byte_len = SAMR_AES_VERSION_BYTE_LEN;
uint8_t auth_data[hmac_size];
+#ifndef HAVE_GNUTLS_CIPHER_ENCRYPT3
uint8_t padding;
size_t i;
+#endif
NTSTATUS status;
bool equal;
int rc;
@@ -355,6 +393,20 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_decrypt(TALLOC_CTX *mem_ctx,
NT_STATUS_DECRYPTION_FAILED);
}
+#ifdef HAVE_GNUTLS_CIPHER_ENCRYPT3
+ rc = gnutls_cipher_decrypt3(cipher_hnd,
+ ciphertext->data,
+ ciphertext->length,
+ pplaintext->data,
+ &pplaintext->length,
+ GNUTLS_CIPHER_PADDING_PKCS7);
+ gnutls_cipher_deinit(cipher_hnd);
+ if (rc < 0) {
+ data_blob_clear_free(pplaintext);
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_DECRYPTION_FAILED);
+ }
+#else /* HAVE_GNUTLS_CIPHER_ENCRYPT3 */
rc = gnutls_cipher_decrypt2(cipher_hnd,
ciphertext->data,
ciphertext->length,
@@ -394,6 +446,7 @@ samba_gnutls_aead_aes_256_cbc_hmac_sha512_decrypt(TALLOC_CTX *mem_ctx,
}
pplaintext->length -= padding;
+#endif /* HAVE_GNUTLS_CIPHER_ENCRYPT3 */
return NT_STATUS_OK;
}
diff --git a/wscript_configure_system_gnutls b/wscript_configure_system_gnutls
index 09c22ef5a9f..7c54a30e048 100644
--- a/wscript_configure_system_gnutls
+++ b/wscript_configure_system_gnutls
@@ -42,6 +42,9 @@ if (gnutls_version >= parse_version('3.7.2')):
conf.msg('Defined HAVE_GNUTLS_CB_TLS_SERVER_END_POINT', '1')
conf.DEFINE('HAVE_GNUTLS_CB_TLS_SERVER_END_POINT', 1)
+# This is available since 3.7.7
+conf.CHECK_FUNCS_IN('gnutls_cipher_encrypt3', 'gnutls')
+
# Check if gnutls has fips mode support
# gnutls_fips140_mode_enabled() is available since 3.3.0
fragment = '''
--
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