Add parameter validation for the GCM module
This commit is contained in:
k-stachowiak
parent
54b789aa74
commit
8ffc92a1e8
6 changed files with 263 additions and 34 deletions
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@ -85,7 +85,7 @@ mbedtls_gcm_context;
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* cipher, nor set the key. For this purpose, use
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* mbedtls_gcm_setkey().
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*
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* \param ctx The GCM context to initialize.
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* \param ctx The GCM context to initialize. This must not be \c NULL.
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*/
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void mbedtls_gcm_init( mbedtls_gcm_context *ctx );
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@ -93,9 +93,10 @@ void mbedtls_gcm_init( mbedtls_gcm_context *ctx );
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* \brief This function associates a GCM context with a
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* cipher algorithm and a key.
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*
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* \param ctx The GCM context to initialize.
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* \param ctx The GCM context. This must be initialized.
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* \param cipher The 128-bit block cipher to use.
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* \param key The encryption key.
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* \param key The encryption key. This must be a readable buffer of at
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* least \p keybits bits.
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* \param keybits The key size in bits. Valid options are:
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* <ul><li>128 bits</li>
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* <li>192 bits</li>
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@ -122,7 +123,8 @@ int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
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* authentic. You should use this function to perform encryption
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* only. For decryption, use mbedtls_gcm_auth_decrypt() instead.
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*
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* \param ctx The GCM context to use for encryption or decryption.
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* \param ctx The GCM context to use for encryption or decryption. This
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* must be initialized.
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* \param mode The operation to perform:
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* - #MBEDTLS_GCM_ENCRYPT to perform authenticated encryption.
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* The ciphertext is written to \p output and the
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@ -136,21 +138,28 @@ int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
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* calling this function in decryption mode.
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* \param length The length of the input data, which is equal to the length
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* of the output data.
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* \param iv The initialization vector.
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* \param iv The initialization vector. This must be a readable buffer of
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* at least \p iv_len Bytes.
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* \param iv_len The length of the IV.
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* \param add The buffer holding the additional data.
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* \param add The buffer holding the additional data. If \p add_len is
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* greater than zero, this must be of at least that size in
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* Bytes.
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* \param add_len The length of the additional data.
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* \param input The buffer holding the input data. Its size is \b length.
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* \param output The buffer for holding the output data. It must have room
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* for \b length bytes.
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* \param input The buffer holding the input data. If \p length is greater
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* than zero, this must be a readable buffer of at least that
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* size in Bytes.
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* \param output The buffer for holding the output data. If \p length is greater
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* than zero, this must be a writable buffer of at least that
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* size in Bytes.
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* \param tag_len The length of the tag to generate.
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* \param tag The buffer for holding the tag.
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* \param tag The buffer for holding the tag. This must be a readable
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* buffer of at least \p tag_len Bytes.
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*
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* \return \c 0 if the encryption or decryption was performed
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* successfully. Note that in #MBEDTLS_GCM_DECRYPT mode,
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* this does not indicate that the data is authentic.
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* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths are not valid or
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* a cipher-specific error code if the encryption
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* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
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* not valid or a cipher-specific error code if the encryption
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* or decryption failed.
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*/
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int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
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@ -173,23 +182,31 @@ int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
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* input buffer. If the buffers overlap, the output buffer
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* must trail at least 8 Bytes behind the input buffer.
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*
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* \param ctx The GCM context.
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* \param ctx The GCM context. This must be initialized.
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* \param length The length of the ciphertext to decrypt, which is also
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* the length of the decrypted plaintext.
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* \param iv The initialization vector.
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* \param iv The initialization vector. This must be a readable buffer
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* of at least \p iv_len Bytes.
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* \param iv_len The length of the IV.
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* \param add The buffer holding the additional data.
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* \param add The buffer holding the additional data. If \p add_len is
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* greater than zero, this must be of at least that size in
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* Bytes.
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* \param add_len The length of the additional data.
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* \param tag The buffer holding the tag to verify.
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* \param tag The buffer holding the tag to verify. This must be a
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* readable buffer of at least \p tag_len Bytes.
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* \param tag_len The length of the tag to verify.
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* \param input The buffer holding the ciphertext. Its size is \b length.
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* \param output The buffer for holding the decrypted plaintext. It must
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* have room for \b length bytes.
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* \param input The buffer holding the ciphertext. If \p length is greater
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* than zero, this must be a readable buffer of at least that
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* size.
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* \param output The buffer for holding the decrypted plaintext. If \p length
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* is greater than zero, this must be a writable buffer of at
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* least that size.
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*
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* \return \c 0 if successful and authenticated.
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* \return #MBEDTLS_ERR_GCM_AUTH_FAILED if the tag does not match.
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* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths are not valid or
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* a cipher-specific error code if the decryption failed.
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* \return #MBEDTLS_ERR_GCM_BAD_INPUT if the lengths or pointers are
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* not valid or a cipher-specific error code if the decryption
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* failed.
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*/
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int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
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size_t length,
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@ -206,15 +223,16 @@ int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
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* \brief This function starts a GCM encryption or decryption
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* operation.
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*
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* \param ctx The GCM context.
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* \param ctx The GCM context. This must be initialized.
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* \param mode The operation to perform: #MBEDTLS_GCM_ENCRYPT or
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* #MBEDTLS_GCM_DECRYPT.
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* \param iv The initialization vector.
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* \param iv The initialization vector. This must be a readable buffer of
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* at least \p iv_len Bytes.
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* \param iv_len The length of the IV.
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* \param add The buffer holding the additional data, or NULL
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* if \p add_len is 0.
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* \param add_len The length of the additional data. If 0,
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* \p add is NULL.
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* \p add may be NULL.
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*
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* \return \c 0 on success.
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*/
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@ -237,11 +255,15 @@ int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
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* input buffer. If the buffers overlap, the output buffer
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* must trail at least 8 Bytes behind the input buffer.
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*
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* \param ctx The GCM context.
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* \param ctx The GCM context. This must be initialized.
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* \param length The length of the input data. This must be a multiple of
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* 16 except in the last call before mbedtls_gcm_finish().
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* \param input The buffer holding the input data.
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* \param output The buffer for holding the output data.
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* \param input The buffer holding the input data. If \p length is greater
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* than zero, this must be a readable buffer of at least that
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* size in Bytes.
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* \param output The buffer for holding the output data. If \p length is
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* greater than zero, this must be a writable buffer of at
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* least that size in Bytes.
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*
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* \return \c 0 on success.
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* \return #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
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@ -258,9 +280,11 @@ int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
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* It wraps up the GCM stream, and generates the
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* tag. The tag can have a maximum length of 16 Bytes.
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*
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* \param ctx The GCM context.
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* \param tag The buffer for holding the tag.
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* \param tag_len The length of the tag to generate. Must be at least four.
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* \param ctx The GCM context. This must be initialized.
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* \param tag The buffer for holding the tag. This must be a readable
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* buffer of at least \p tag_len Bytes.
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* \param tag_len The length of the tag to generate. This must be at least
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* four.
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*
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* \return \c 0 on success.
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* \return #MBEDTLS_ERR_GCM_BAD_INPUT on failure.
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@ -273,7 +297,8 @@ int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
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* \brief This function clears a GCM context and the underlying
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* cipher sub-context.
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*
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* \param ctx The GCM context to clear.
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* \param ctx The GCM context to clear. If this is \c NULL, the call has
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* no effect.
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*/
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void mbedtls_gcm_free( mbedtls_gcm_context *ctx );
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@ -57,6 +57,12 @@
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#if !defined(MBEDTLS_GCM_ALT)
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/* Parameter validation macros */
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#define GCM_VALIDATE_RET( cond ) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_GCM_BAD_INPUT )
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#define GCM_VALIDATE( cond ) \
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MBEDTLS_INTERNAL_VALIDATE( cond )
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/*
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* 32-bit integer manipulation macros (big endian)
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*/
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@ -85,6 +91,7 @@
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*/
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void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
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{
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GCM_VALIDATE( ctx != NULL );
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memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
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}
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@ -164,6 +171,10 @@ int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
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int ret;
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const mbedtls_cipher_info_t *cipher_info;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( key != NULL );
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GCM_VALIDATE_RET( keybits == 128 || keybits == 192 || keybits == 256 );
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cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB );
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if( cipher_info == NULL )
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return( MBEDTLS_ERR_GCM_BAD_INPUT );
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@ -274,6 +285,10 @@ int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
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const unsigned char *p;
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size_t use_len, olen = 0;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( iv != NULL );
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GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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/* IV and AD are limited to 2^64 bits, so 2^61 bytes */
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/* IV is not allowed to be zero length */
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if( iv_len == 0 ||
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@ -356,6 +371,10 @@ int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
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unsigned char *out_p = output;
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size_t use_len, olen = 0;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( length == 0 || input != NULL );
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GCM_VALIDATE_RET( length == 0 || output != NULL );
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if( output > input && (size_t) ( output - input ) < length )
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return( MBEDTLS_ERR_GCM_BAD_INPUT );
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@ -409,8 +428,14 @@ int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
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{
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unsigned char work_buf[16];
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size_t i;
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uint64_t orig_len = ctx->len * 8;
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uint64_t orig_add_len = ctx->add_len * 8;
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uint64_t orig_len;
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uint64_t orig_add_len;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( tag != NULL );
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orig_len = ctx->len * 8;
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orig_add_len = ctx->add_len * 8;
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if( tag_len > 16 || tag_len < 4 )
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return( MBEDTLS_ERR_GCM_BAD_INPUT );
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@ -452,6 +477,13 @@ int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
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{
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int ret;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( iv != NULL );
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GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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GCM_VALIDATE_RET( length == 0 || input != NULL );
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GCM_VALIDATE_RET( length == 0 || output != NULL );
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GCM_VALIDATE_RET( tag != NULL );
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if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
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return( ret );
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@ -480,6 +512,13 @@ int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
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size_t i;
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int diff;
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GCM_VALIDATE_RET( ctx != NULL );
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GCM_VALIDATE_RET( iv != NULL );
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GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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GCM_VALIDATE_RET( tag != NULL );
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GCM_VALIDATE_RET( length == 0 || input != NULL );
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GCM_VALIDATE_RET( length == 0 || output != NULL );
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if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
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iv, iv_len, add, add_len,
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input, output, tag_len, check_tag ) ) != 0 )
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@ -502,6 +541,9 @@ int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
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void mbedtls_gcm_free( mbedtls_gcm_context *ctx )
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{
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if( ctx == NULL ) {
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return;
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}
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mbedtls_cipher_free( &ctx->cipher_ctx );
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_gcm_context ) );
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}
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@ -92,6 +92,7 @@ add_test_suite(gcm gcm.aes128_de)
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add_test_suite(gcm gcm.aes192_de)
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add_test_suite(gcm gcm.aes256_de)
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add_test_suite(gcm gcm.camellia)
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add_test_suite(gcm gcm.misc)
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add_test_suite(hkdf)
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add_test_suite(hmac_drbg hmac_drbg.misc)
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add_test_suite(hmac_drbg hmac_drbg.no_reseed)
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@ -632,4 +632,3 @@ int hexcmp( uint8_t * a, uint8_t * b, uint32_t a_len, uint32_t b_len )
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}
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return ret;
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}
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@ -103,6 +103,166 @@ exit:
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}
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/* END_CASE */
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/* BEGIN_CASE depends_on:MBEDTLS_CHECK_PARAMS:!MBEDTLS_PARAM_FAILED_ALT */
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void gcm_invalid_param( )
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{
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mbedtls_gcm_context ctx;
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unsigned char valid_buffer[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };
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mbedtls_cipher_id_t valid_cipher = MBEDTLS_CIPHER_ID_AES;
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int valid_mode = MBEDTLS_GCM_ENCRYPT;
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int valid_len = sizeof(valid_buffer);
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int valid_bitlen = 128, invalid_bitlen = 1;
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mbedtls_gcm_init( &ctx );
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/* mbedtls_gcm_init() */
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TEST_INVALID_PARAM( mbedtls_gcm_init( NULL ) );
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/* mbedtls_gcm_setkey */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_setkey( NULL, valid_cipher, valid_buffer, valid_bitlen ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_setkey( &ctx, valid_cipher, NULL, valid_bitlen ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_setkey( &ctx, valid_cipher, valid_buffer, invalid_bitlen ) );
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/* mbedtls_gcm_crypt_and_tag() */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_crypt_and_tag( NULL, valid_mode, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_len, valid_buffer ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_crypt_and_tag( &ctx, valid_mode, valid_len,
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NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_len, valid_buffer ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_crypt_and_tag( &ctx, valid_mode, valid_len,
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valid_buffer, valid_len,
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NULL, valid_len,
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valid_buffer, valid_buffer,
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valid_len, valid_buffer ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_crypt_and_tag( &ctx, valid_mode, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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NULL, valid_buffer,
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valid_len, valid_buffer ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_crypt_and_tag( &ctx, valid_mode, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, NULL,
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valid_len, valid_buffer ) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_crypt_and_tag( &ctx, valid_mode, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer,
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valid_len, NULL ) );
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/* mbedtls_gcm_auth_decrypt() */
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_auth_decrypt( NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer) );
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TEST_INVALID_PARAM_RET(
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MBEDTLS_ERR_GCM_BAD_INPUT,
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mbedtls_gcm_auth_decrypt( &ctx, valid_len,
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NULL, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_len,
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valid_buffer, valid_buffer) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_auth_decrypt( &ctx, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
NULL, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_buffer) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_auth_decrypt( &ctx, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
NULL, valid_len,
|
||||
valid_buffer, valid_buffer) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_auth_decrypt( &ctx, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
NULL, valid_buffer) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_auth_decrypt( &ctx, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, NULL) );
|
||||
|
||||
/* mbedtls_gcm_starts() */
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_starts( NULL, valid_mode,
|
||||
valid_buffer, valid_len,
|
||||
valid_buffer, valid_len ) );
|
||||
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_starts( &ctx, valid_mode,
|
||||
NULL, valid_len,
|
||||
valid_buffer, valid_len ) );
|
||||
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_starts( &ctx, valid_mode,
|
||||
valid_buffer, valid_len,
|
||||
NULL, valid_len ) );
|
||||
|
||||
/* mbedtls_gcm_update() */
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_update( NULL, valid_len,
|
||||
valid_buffer, valid_buffer ) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_update( &ctx, valid_len,
|
||||
NULL, valid_buffer ) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_update( &ctx, valid_len,
|
||||
valid_buffer, NULL ) );
|
||||
|
||||
/* mbedtls_gcm_finish() */
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_finish( NULL, valid_buffer, valid_len ) );
|
||||
TEST_INVALID_PARAM_RET(
|
||||
MBEDTLS_ERR_GCM_BAD_INPUT,
|
||||
mbedtls_gcm_finish( &ctx, NULL, valid_len ) );
|
||||
|
||||
exit:
|
||||
mbedtls_gcm_free( &ctx );
|
||||
}
|
||||
/* END_CASE */
|
||||
|
||||
/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
|
||||
void gcm_selftest( )
|
||||
{
|
||||
|
|
|
|||
2
tests/suites/test_suite_gcm.misc.data
Normal file
2
tests/suites/test_suite_gcm.misc.data
Normal file
|
|
@ -0,0 +1,2 @@
|
|||
GCM - Invalid parameters
|
||||
gcm_invalid_param:
|
||||
Loading…
Reference in a new issue