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Gilles Peskine 0e5faf6407 mbedtls_mpi_sub_abs: check the range of the result when it happens 
The function mbedtls_mpi_sub_abs first checked that A >= B and then
performed the subtraction, relying on the fact that A >= B to
guarantee that the carry propagation would stop, and not taking
advantage of the fact that the carry when subtracting two numbers can
only be 0 or 1. This made the carry propagation code a little hard to
follow.

Write an ad hoc loop for the carry propagation, checking the size of
the result. This makes termination obvious.

The initial check that A >= B is no longer needed, since the function
now checks that the carry propagation terminates, which is equivalent.
This is a slight performance gain.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-06-08 22:50:35 +02:00
..
.gitignore
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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
mbedtls_mpi_sub_abs: check the range of the result when it happens
2020-06-08 22:50:35 +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_wrap.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
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_curves.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
entropy_poll.c
Add support for midipix, a POSIX layer for Microsoft Windows
2020-05-20 18:14:45 +00:00
entropy.c
Merge pull request #323 from yanesca/iotcrypt-942-initialise-return-values
2019-12-19 10:24:22 +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
Remove crypto C files
2019-08-15 15:44:50 +01:00
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
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
md.c
Fix "same actions in two cases of a switch statement" warning
2020-04-20 13:56:09 +03:00
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_wrap.c
Remove mbedtls_psa_translate_ecc_group
2020-01-31 10:15:32 +01:00
pk.c
pk: USE_PSA_CRYPTO: don't translate via the TLS ID
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_util.c
Check for zero length and NULL buffer pointer.
2019-09-04 11:31:35 +01:00
platform.c
Initialise return values to an error
2019-12-03 16:07:18 +00:00
poly1305.c
Initialise return values to an error
2019-12-03 16:07:18 +00:00
psa_crypto_core.h
Rename internal macro to pass check-names.sh
2019-08-08 10:58:09 +02:00
psa_crypto_invasive.h
…
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_crypto.c
psa: Define mbedtls_ecc_group_to_psa() inline
2020-05-05 12:41:48 +01:00
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_internal.c
Remove crypto C files
2019-08-15 15:44:50 +01:00
rsa.c
Final review comments
2020-01-28 14:43:52 -05:00
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_features.c
Declare MBEDTLS_TEST_HOOKS in config.h
2020-03-24 22:56:45 +01:00
version.c
…
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
x509.c
fix mbedtls_x509_dn_gets to escape non-ASCII characters
2020-05-21 01:56:55 +09:00
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