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Introduce specific error for ver/cfg mismatch on deserialization

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This commit introduces a new SSL error code

  `MBEDTLS_ERR_SSL_VERSION_MISMATCH`

which can be used to indicate operation failure due to a
mismatch of version or configuration.

It is put to use in the implementation of `mbedtls_ssl_session_load()`
to signal the attempt to de-serialize a session which has been serialized
in a build of Mbed TLS using a different version or configuration.
This commit is contained in:
Hanno Becker
2019-06-03 12:58:39 +01:00
committed by Jarno Lamsa
parent fe1275e3fe
commit f9b3303eb9
5 changed files with 9 additions and 3 deletions
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4
include/mbedtls/ssl.h
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@ -127,6 +127,7 @@
#define MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS -0x6500 /**< The asynchronous operation is not completed yet. */
#define MBEDTLS_ERR_SSL_EARLY_MESSAGE -0x6480 /**< Internal-only message signaling that a message arrived early. */
#define MBEDTLS_ERR_SSL_UNEXPECTED_CID -0x6000 /**< An encrypted DTLS-frame with an unexpected CID was received. */
#define MBEDTLS_ERR_SSL_VERSION_MISMATCH -0x5F00 /**< An operation failed due to an unexpected version or configuration. */
#define MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS -0x7000 /**< A cryptographic operation is in progress. Try again later. */
/*
@ -2382,6 +2383,9 @@ int mbedtls_ssl_set_session( mbedtls_ssl_context *ssl, const mbedtls_ssl_session
* \return \c 0 if successful.
* \return #MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed.
* \return #MBEDTLS_ERR_SSL_BAD_INPUT_DATA if input data is invalid.
* \return #MBEDTLS_ERR_SSL_VERSION_MISMATCH if the serialized data
* was generated in a different version or configuration of
* Mbed TLS.
* \return Another negative value for other kinds of errors (for
* example, unsupported features in the embedded certificate).
*/