Remove psa_key_derivation from the official API
Keep it defined as an implementation-specific extension until the
tests are updated.
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 2217b95..0e842e5 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -2231,59 +2231,6 @@
psa_key_derivation_step_t step,
psa_key_handle_t handle);
-/** Set up a key derivation operation.
- *
- * A key derivation algorithm takes three inputs: a secret input \p key and
- * two non-secret inputs \p label and p salt.
- * The result of this function is a byte generator which can
- * be used to produce keys and other cryptographic material.
- *
- * The role of \p label and \p salt is as follows:
- * - For HKDF (#PSA_ALG_HKDF), \p salt is the salt used in the "extract" step
- * and \p label is the info string used in the "expand" step.
- *
- * \param[in,out] generator The generator object to set up. It must have
- * been initialized as per the documentation for
- * #psa_crypto_generator_t and not yet in use.
- * \param handle Handle to the secret key.
- * \param alg The key derivation algorithm to compute
- * (\c PSA_ALG_XXX value such that
- * #PSA_ALG_IS_KEY_DERIVATION(\p alg) is true).
- * \param[in] salt Salt to use.
- * \param salt_length Size of the \p salt buffer in bytes.
- * \param[in] label Label to use.
- * \param label_length Size of the \p label buffer in bytes.
- * \param capacity The maximum number of bytes that the
- * generator will be able to provide.
- *
- * \retval #PSA_SUCCESS
- * Success.
- * \retval #PSA_ERROR_INVALID_HANDLE
- * \retval #PSA_ERROR_EMPTY_SLOT
- * \retval #PSA_ERROR_NOT_PERMITTED
- * \retval #PSA_ERROR_INVALID_ARGUMENT
- * \c key is not compatible with \c alg,
- * or \p capacity is too large for the specified algorithm and key.
- * \retval #PSA_ERROR_NOT_SUPPORTED
- * \c alg is not supported or is not a key derivation algorithm.
- * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
- * \retval #PSA_ERROR_COMMUNICATION_FAILURE
- * \retval #PSA_ERROR_HARDWARE_FAILURE
- * \retval #PSA_ERROR_TAMPERING_DETECTED
- * \retval #PSA_ERROR_BAD_STATE
- * The library has not been previously initialized by psa_crypto_init().
- * It is implementation-dependent whether a failure to initialize
- * results in this error code.
- */
-psa_status_t psa_key_derivation(psa_crypto_generator_t *generator,
- psa_key_handle_t handle,
- psa_algorithm_t alg,
- const uint8_t *salt,
- size_t salt_length,
- const uint8_t *label,
- size_t label_length,
- size_t capacity);
-
/** Perform a key agreement and use the shared secret as input to a key
* derivation.
*
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index 7f08857..7d89fbf 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -120,6 +120,62 @@
psa_status_t mbedtls_psa_inject_entropy(const unsigned char *seed,
size_t seed_size);
+/** Set up a key derivation operation.
+ *
+ * FIMXE This function is no longer part of the official API. Its prototype
+ * is only kept around for the sake of tests that haven't been updated yet.
+ *
+ * A key derivation algorithm takes three inputs: a secret input \p key and
+ * two non-secret inputs \p label and p salt.
+ * The result of this function is a byte generator which can
+ * be used to produce keys and other cryptographic material.
+ *
+ * The role of \p label and \p salt is as follows:
+ * - For HKDF (#PSA_ALG_HKDF), \p salt is the salt used in the "extract" step
+ * and \p label is the info string used in the "expand" step.
+ *
+ * \param[in,out] generator The generator object to set up. It must have
+ * been initialized as per the documentation for
+ * #psa_crypto_generator_t and not yet in use.
+ * \param handle Handle to the secret key.
+ * \param alg The key derivation algorithm to compute
+ * (\c PSA_ALG_XXX value such that
+ * #PSA_ALG_IS_KEY_DERIVATION(\p alg) is true).
+ * \param[in] salt Salt to use.
+ * \param salt_length Size of the \p salt buffer in bytes.
+ * \param[in] label Label to use.
+ * \param label_length Size of the \p label buffer in bytes.
+ * \param capacity The maximum number of bytes that the
+ * generator will be able to provide.
+ *
+ * \retval #PSA_SUCCESS
+ * Success.
+ * \retval #PSA_ERROR_INVALID_HANDLE
+ * \retval #PSA_ERROR_EMPTY_SLOT
+ * \retval #PSA_ERROR_NOT_PERMITTED
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ * \c key is not compatible with \c alg,
+ * or \p capacity is too large for the specified algorithm and key.
+ * \retval #PSA_ERROR_NOT_SUPPORTED
+ * \c alg is not supported or is not a key derivation algorithm.
+ * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_TAMPERING_DETECTED
+ * \retval #PSA_ERROR_BAD_STATE
+ * The library has not been previously initialized by psa_crypto_init().
+ * It is implementation-dependent whether a failure to initialize
+ * results in this error code.
+ */
+psa_status_t psa_key_derivation(psa_crypto_generator_t *generator,
+ psa_key_handle_t handle,
+ psa_algorithm_t alg,
+ const uint8_t *salt,
+ size_t salt_length,
+ const uint8_t *label,
+ size_t label_length,
+ size_t capacity);
+
#ifdef __cplusplus
}