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In mpi_montmul, an auxiliary function for modular exponentiation (mbedtls_mpi_mod_exp) that performs Montgomery multiplication, the last step is a conditional subtraction to force the result into the correct range. The current implementation uses a branch and therefore may leak information about secret data to an adversary who can observe what branch is taken through a side channel. Avoid this potential leak by always doing the same subtraction and doing a contant-trace conditional assignment to set the result. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com> |
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| .. | ||
| .gitignore | ||
| aes.c | ||
| aesni.c | ||
| arc4.c | ||
| asn1parse.c | ||
| asn1write.c | ||
| base64.c | ||
| bignum.c | ||
| blowfish.c | ||
| camellia.c | ||
| ccm.c | ||
| certs.c | ||
| cipher.c | ||
| cipher_wrap.c | ||
| cmac.c | ||
| CMakeLists.txt | ||
| ctr_drbg.c | ||
| debug.c | ||
| des.c | ||
| dhm.c | ||
| ecdh.c | ||
| ecdsa.c | ||
| ecjpake.c | ||
| ecp.c | ||
| ecp_curves.c | ||
| entropy.c | ||
| entropy_poll.c | ||
| error.c | ||
| gcm.c | ||
| havege.c | ||
| hmac_drbg.c | ||
| Makefile | ||
| md.c | ||
| md2.c | ||
| md4.c | ||
| md5.c | ||
| md_wrap.c | ||
| memory_buffer_alloc.c | ||
| net_sockets.c | ||
| oid.c | ||
| padlock.c | ||
| pem.c | ||
| pk.c | ||
| pk_wrap.c | ||
| pkcs5.c | ||
| pkcs11.c | ||
| pkcs12.c | ||
| pkparse.c | ||
| pkwrite.c | ||
| platform.c | ||
| ripemd160.c | ||
| rsa.c | ||
| rsa_internal.c | ||
| sha1.c | ||
| sha256.c | ||
| sha512.c | ||
| ssl_cache.c | ||
| ssl_ciphersuites.c | ||
| ssl_cli.c | ||
| ssl_cookie.c | ||
| ssl_srv.c | ||
| ssl_ticket.c | ||
| ssl_tls.c | ||
| threading.c | ||
| timing.c | ||
| version.c | ||
| version_features.c | ||
| x509.c | ||
| x509_create.c | ||
| x509_crl.c | ||
| x509_crt.c | ||
| x509_csr.c | ||
| x509write_crt.c | ||
| x509write_csr.c | ||
| xtea.c | ||