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mbedtls/library
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Gilles Peskine c097e9ea45 Move carry propagation out of mpi_sub_hlp 
The function mpi_sub_hlp had confusing semantics: although it took a
size parameter, it accessed the limb array d beyond this size, to
propagate the carry. This made the function difficult to understand
and analyze, with a potential buffer overflow if misused (not enough
room to propagate the carry).

Change the function so that it only performs the subtraction within
the specified number of limbs, and returns the carry.

Move the carry propagation out of mpi_sub_hlp and into its caller
mbedtls_mpi_sub_abs. This makes the code of subtraction very slightly
less neat, but not significantly different.

In the one other place where mpi_sub_hlp is used, namely mpi_montmul,
this is a net win because the carry is potentially sensitive data and
the function carefully arranges to not have to propagate it.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-06-08 22:08:21 +02:00
..
.gitignore Split libs with make + general make cleanups 2015-06-25 10:59:56 +02:00
aes.c Fix GCC format-signedness warnings 2020-04-22 16:01:48 +02:00
aesni.c Remove crypto C files 2019-08-15 15:44:50 +01:00
arc4.c Remove crypto C files 2019-08-15 15:44:50 +01:00
aria.c Remove crypto C files 2019-08-15 15:44:50 +01:00
asn1parse.c Replace use of uint8_t by unsigned char in ASN.1 seq traversal API 2020-02-03 10:39:55 +00:00
asn1write.c Merge pull request #323 from yanesca/iotcrypt-942-initialise-return-values 2019-12-19 10:24:22 +00:00
base64.c Remove crypto C files 2019-08-15 15:44:50 +01:00
bignum.c Move carry propagation out of mpi_sub_hlp 2020-06-08 22:08:21 +02:00
blowfish.c Remove crypto C files 2019-08-15 15:44:50 +01:00
camellia.c Remove crypto C files 2019-08-15 15:44:50 +01:00
ccm.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
certs.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
chacha20.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
chachapoly.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
cipher.c Remove redundant block_size validity check 2020-01-21 15:02:14 +01:00
cipher_wrap.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
cmac.c Fix GCC format-signedness warnings 2020-04-22 16:01:48 +02:00
CMakeLists.txt Merge pull request #3147 from gocarlos/gocarlos-patch-1 2020-04-29 17:14:48 +01:00
common.h New header common.h; define MBEDTLS_STATIC_TESTABLE 2020-03-24 22:57:11 +01:00
ctr_drbg.c Merge branch 'development' into development-restricted 2020-01-15 15:55:11 +00:00
debug.c Fix GCC format-signedness warnings 2020-04-22 16:01:48 +02:00
des.c des: Reduce number of self-test iterations 2019-09-04 10:11:45 +01:00
dhm.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
ecdh.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
ecdsa.c Fix incrementing pointer instead of value 2020-01-24 12:11:56 +01:00
ecjpake.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
ecp.c Merge pull request #3209 from aurel32/fix-ecp_double_add_mxz 2020-04-24 09:28:17 +02:00
ecp_curves.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
entropy.c Merge pull request #323 from yanesca/iotcrypt-942-initialise-return-values 2019-12-19 10:24:22 +00:00
entropy_poll.c Add support for midipix, a POSIX layer for Microsoft Windows 2020-05-20 18:14:45 +00:00
error.c Re-generate error.c 2020-05-25 12:23:55 +02:00
gcm.c Merge branch 'development' into development-restricted 2020-01-15 15:55:11 +00:00
havege.c Fix minor type choice inconsistency 2019-06-24 15:45:09 +02:00
hkdf.c hkdf_expand: explicitly initialize t 2020-04-02 19:54:51 +02:00
hmac_drbg.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
Makefile Sort lists in Makefiles and have one item per line 2020-04-17 11:57:50 +02:00
md.c Fix "same actions in two cases of a switch statement" warning 2020-04-20 13:56:09 +03:00
md2.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
md4.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
md5.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
memory_buffer_alloc.c Remove crypto C files 2019-08-15 15:44:50 +01:00
net_sockets.c Add support for midipix, a POSIX layer for Microsoft Windows 2020-05-20 18:14:45 +00:00
nist_kw.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
oid.c Fix GCC format-signedness warnings 2020-04-22 16:01:48 +02:00
padlock.c Remove crypto C files 2019-08-15 15:44:50 +01:00
pem.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
pk.c pk: USE_PSA_CRYPTO: don't translate via the TLS ID 2020-01-31 10:15:32 +01:00
pk_wrap.c Remove mbedtls_psa_translate_ecc_group 2020-01-31 10:15:32 +01:00
pkcs5.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
pkcs11.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
pkcs12.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
pkparse.c Fix pkparse bug wrt MBEDTLS_RSA_ALT 2020-02-18 10:31:29 +01:00
pkwrite.c Change key types to a 16-bit encoding 2020-01-31 10:24:21 +01:00
platform.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
platform_util.c Check for zero length and NULL buffer pointer. 2019-09-04 11:31:35 +01:00
poly1305.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
psa_crypto.c psa: Define mbedtls_ecc_group_to_psa() inline 2020-05-05 12:41:48 +01:00
psa_crypto_core.h Rename internal macro to pass check-names.sh 2019-08-08 10:58:09 +02:00
psa_crypto_invasive.h Add a facility to configure entropy sources 2018-11-23 22:58:38 +01:00
psa_crypto_its.h Add psa_trusted_storage_linux persistent storage support for v1.0.0 APIs 2019-07-23 17:30:37 +01:00
psa_crypto_se.c Update SE support to pass a location when registering a driver 2020-05-11 11:15:26 +02:00
psa_crypto_se.h Update SE support to pass a location when registering a driver 2020-05-11 11:15:26 +02:00
psa_crypto_service_integration.h Add common header for crypto service integration 2019-02-19 15:09:14 +02:00
psa_crypto_slot_management.c Make psa_close_key(0) and psa_destroy_key(0) succeed 2019-10-08 15:57:27 +02:00
psa_crypto_slot_management.h Rename psa_internal_allocate_key_slot to psa_get_empty_key_slot 2019-08-08 10:58:09 +02:00
psa_crypto_storage.c Change key types to a 16-bit encoding 2020-01-31 10:24:21 +01:00
psa_crypto_storage.h Switch storage functions over to psa_core_key_attributes_t 2019-07-31 14:15:27 +02:00
psa_its_file.c Add an input check in psa_its_set 2019-09-05 09:34:34 -04:00
ripemd160.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
rsa.c Final review comments 2020-01-28 14:43:52 -05:00
rsa_internal.c Remove crypto C files 2019-08-15 15:44:50 +01:00
sha1.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
sha256.c Initialise return values to an error 2019-12-03 16:07:18 +00:00
sha512.c Fix some whitespace issues 2020-01-29 09:46:49 +01:00
ssl_cache.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
ssl_ciphersuites.c Rename identifiers containing double-underscore 2020-03-23 17:55:32 +01:00
ssl_cli.c Merge branch 'development-restricted' into prepare-rc-2.22.0-updated 2020-04-09 12:17:11 +02:00
ssl_cookie.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
ssl_msg.c Merge pull request #3163 from AndrzejKurek/variable-buffers-renegotiation 2020-04-09 12:11:02 +01:00
ssl_srv.c Merge pull request #3150 from irwir/fix_ssl_srv 2020-04-22 09:31:00 +02:00
ssl_ticket.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
ssl_tls.c Merge pull request #3312 from sander-visser/cleanup-nullptr-deref 2020-05-11 21:59:07 +02:00
threading.c Remove crypto C files 2019-08-15 15:44:50 +01:00
timing.c Add support for midipix, a POSIX layer for Microsoft Windows 2020-05-20 18:14:45 +00:00
version.c Fix missing void argument declarations #678 2016-11-04 23:05:56 +01:00
version_features.c Declare MBEDTLS_TEST_HOOKS in config.h 2020-03-24 22:56:45 +01:00
x509.c fix mbedtls_x509_dn_gets to escape non-ASCII characters 2020-05-21 01:56:55 +09:00
x509_create.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
x509_crl.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
x509_crt.c Merge remote-tracking branch 'upstream/development' into fix_x509_crt.c 2020-04-27 18:01:08 +03:00
x509_csr.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
x509write_crt.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
x509write_csr.c Revert "Remove unused TLS, NET, and X.509 files" 2020-03-19 13:36:33 +01:00
xtea.c Remove crypto C files 2019-08-15 15:44:50 +01:00