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MD API deprecation: ChangeLog updates

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Use the updated names for the new functions (xxx_ret instead of xxx_ext).

List the new deprecations in the appropriate sections.

Credit the independent report of the misuse of zeroizing to reset a
hash context in entropy.c.
This commit is contained in:
Gilles Peskine 2018-01-22 14:55:20 +01:00
parent 3e28d70813
commit 0a96910e55
1 changed files with 19 additions and 14 deletions
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33
ChangeLog
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@ -40,6 +40,11 @@ New deprecations
(e.g., signing with a public key).
* Direct manipulation of structure fields of RSA contexts is deprecated.
Users are advised to use the extended RSA API instead.
* Deprecate usage of message digest functions that return void
(mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update,
mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is
any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions
that can return an error code.
API Changes
* Extend RSA interface by multiple functions allowing structure-
@ -51,19 +56,14 @@ API Changes
purpose or CRT and/or blinding.
* The configuration option MBEDTLS_RSA_ALT can be used to define alternative
implementations of the RSA interface declared in rsa.h.
* The following functions in the MD2, MD4, MD5, SHA1, SHA256 and SHA512
modules have been deprecated and replaced as shown below. The new
functions change the return type from void to int to allow returning error
codes when using MBEDTLS_<MODULE>_ALT.
mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ext()
mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ext()
mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ext()
* The following functions in the message digest modules (MD2, MD4, MD5,
SHA1, SHA256, SHA512) have been deprecated and replaced as shown below.
The new functions change the return type from void to int to allow
returning error codes when using MBEDTLS_<MODULE>_ALT.
mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret()
mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret()
mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret()
mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process()
The type of the function pointers in the mbedtls_md_info_t struct have
also been modified taking into account the functions return code. Every
usage of the deprecated functions was updated. Furthermore, the MD return
codes are checked for error after every usage, except in the ssl_tls.c
module.
Bugfix
* Fix ssl_parse_record_header() to silently discard invalid DTLS records
@ -118,8 +118,9 @@ Bugfix
mbedtls_sha512_starts() in the mbedtls_entropy_init() function.
* Fix the entropy.c module to ensure that mbedtls_sha256_init() or
mbedtls_sha512_init() is called before operating on the relevant context
structure. Also, ensure that message digest contexts are freed when
calling mbedtls_entropy_free().
structure. Do not assume that zeroizing a context is a correct way to
reset it. Found independently by ccli8 on Github.
* In mbedtls_entropy_free(), properly free the message digest context.
Changes
* Extend cert_write example program by options to set the CRT version
@ -132,6 +133,10 @@ Changes
* Only run AES-192 self-test if AES-192 is available. Fixes #963.
* Tighten the RSA PKCS#1 v1.5 signature verification code and remove the
undeclared dependency of the RSA module on the ASN.1 module.
* Update all internal usage of deprecated message digest functions to the
new ones with return codes. In particular, this modifies the
mbedtls_md_info_t structure. Propagate errors from these functions
everywhere except some locations in the ssl_tls.c module.
= mbed TLS 2.6.0 branch released 2017-08-10