mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2025-03-17 17:37:39 +00:00
Fix size macros and its documentation
Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
This commit is contained in:
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fbd9f1e683
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e86bdcaa11
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@ -145,8 +145,7 @@
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*
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* See also #PSA_AEAD_TAG_LENGTH(\p alg).
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*/
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#define PSA_AEAD_TAG_MAX_SIZE \
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(PSA_ALG_AEAD_TAG_LENGTH_MASK >> PSA_AEAD_TAG_LENGTH_OFFSET)
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#define PSA_AEAD_TAG_MAX_SIZE 16
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/* The maximum size of an RSA key on this implementation, in bits.
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* This is a vendor-specific macro.
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@ -249,6 +248,10 @@
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* insufficient buffer size. Depending on the algorithm, the actual size of
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* the ciphertext may be smaller.
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*
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* \warning This macro may evaluate its arguments multiple times or
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* zero times, so you should not pass arguments that contain
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* side effects.
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*
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* \param alg An AEAD algorithm
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_AEAD(\p alg) is true).
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@ -272,6 +275,9 @@
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* If the size of the ciphertext buffer is at least this large, it is guaranteed
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* that psa_aead_encrypt() will not fail due to an insufficient buffer size.
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*
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* \note This macro returns a compile-time constant if its arguments are
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* compile-time constants.
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*
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* See also #PSA_AEAD_ENCRYPT_OUTPUT_SIZE(\p alg, \p plaintext_length).
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*
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* \param plaintext_length Size of the plaintext in bytes.
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@ -291,6 +297,10 @@
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* insufficient buffer size. Depending on the algorithm, the actual size of
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* the plaintext may be smaller.
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*
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* \warning This macro may evaluate its arguments multiple times or
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* zero times, so you should not pass arguments that contain
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* side effects.
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*
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* \param alg An AEAD algorithm
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_AEAD(\p alg) is true).
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@ -380,6 +390,10 @@
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* insufficient buffer size. The actual size of the output may be smaller
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* in any given call.
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*
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* \warning This macro may evaluate its arguments multiple times or
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* zero times, so you should not pass arguments that contain
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* side effects.
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*
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* \param alg An AEAD algorithm
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* (\c PSA_ALG_XXX value such that
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* #PSA_ALG_IS_AEAD(\p alg) is true).
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@ -397,11 +411,9 @@
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* capable of this. So for modes based on a block cipher, allow the
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* implementation to delay the output until it has a full block. */
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#define PSA_AEAD_UPDATE_OUTPUT_SIZE(alg, input_length) \
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(PSA_AEAD_TAG_LENGTH(alg) != 0 ? \
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(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
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PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)) : \
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(input_length)) : \
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0)
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(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
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PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)) : \
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(input_length)) : \
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/** A sufficient output buffer size for psa_aead_update(), for any of the
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* supported key types and AEAD algorithms.
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@ -573,10 +585,12 @@
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/** A sufficient output buffer size for psa_asymmetric_encrypt(), for any
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* supported asymmetric encryption.
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*
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* This macro assumes that RSA is the only supported asymmetric encryption.
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*
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* See also #PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(\p key_type, \p key_bits, \p alg).
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*/
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#define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE \
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(PSA_BITS_TO_BYTES(PSA_MAX_KEY_BITS))
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(PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
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/** Sufficient output buffer size for psa_asymmetric_decrypt().
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*
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@ -612,10 +626,12 @@
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/** A sufficient output buffer size for psa_asymmetric_decrypt(), for any
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* supported asymmetric decryption.
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*
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* This macro assumes that RSA is the only supported asymmetric encryption.
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*
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* See also #PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(\p key_type, \p key_bits, \p alg).
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*/
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#define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE \
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(PSA_BITS_TO_BYTES(PSA_MAX_KEY_BITS))
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(PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
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/* Maximum size of the ASN.1 encoding of an INTEGER with the specified
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* number of bits.
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@ -783,9 +799,9 @@
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* This macro returns a compile-time constant if its arguments are
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* compile-time constants.
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*
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* \warning This function can evaluate its arguments multiple times or
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* zero times. Providing arguments that have side effects will
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* result in implementation-specific behavior, and is non-portable.
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* \warning This macro may evaluate its arguments multiple times or
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* zero times, so you should not pass arguments that contain
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* side effects.
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*
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* The following code illustrates how to allocate enough memory to export
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* a public key by querying the key type and size at runtime.
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@ -793,19 +809,16 @@
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* psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
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* psa_status_t status;
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* status = psa_get_key_attributes(key, &attributes);
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* if (status != PSA_SUCCESS)
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* handle_error(...);
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* if (status != PSA_SUCCESS) handle_error(...);
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* psa_key_type_t key_type = psa_get_key_type(&attributes);
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* size_t key_bits = psa_get_key_bits(&attributes);
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* size_t buffer_size = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits);
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* psa_reset_key_attributes(&attributes);
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* uint8_t *buffer = malloc(buffer_size);
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* if (buffer == NULL)
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* handle_error(...);
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* if (buffer == NULL) handle_error(...);
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* size_t buffer_length;
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* status = psa_export_public_key(key, buffer, buffer_size, &buffer_length);
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* if (status != PSA_SUCCESS)
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* handle_error(...);
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* if (status != PSA_SUCCESS) handle_error(...);
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* \endcode
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*
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* \param key_type A public key or key pair key type.
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@ -827,10 +840,9 @@
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* \p #PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(\p key_type),
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* \p key_bits).
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*/
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#define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
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((key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
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(key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
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PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
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#define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
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(PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
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PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
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0)
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/** Sufficient buffer size for exporting any asymmetric key pair.
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@ -842,17 +854,11 @@
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*
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* See also #PSA_EXPORT_KEY_OUTPUT_SIZE(\p key_type, \p key_bits).
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*/
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#define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
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(PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) ? \
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(PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) ? \
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PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) : \
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PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS)) : \
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(PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) ? \
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PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS) : \
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PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_MAX_KEY_BITS)))
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#define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
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(PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
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PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
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PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
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/** Sufficient buffer size for exporting any asymmetric public key.
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*
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@ -864,26 +870,20 @@
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*
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* See also #PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(\p key_type, \p key_bits).
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*/
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#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
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(PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) ? \
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(PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) ? \
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PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) : \
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PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS)) : \
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(PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) ? \
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PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS) : \
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PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_MAX_KEY_BITS)))
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#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
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(PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
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PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
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PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
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PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
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/** Sufficient output buffer size for psa_raw_key_agreement().
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*
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* This macro returns a compile-time constant if its arguments are
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* compile-time constants.
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*
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* \warning This function can evaluate its arguments multiple times or
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* zero times. Providing arguments that have side effects will
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* result in implementation-specific behavior, and is non-portable.
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* \warning This macro may evaluate its arguments multiple times or
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* zero times, so you should not pass arguments that contain
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* side effects.
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*
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* See also #PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE.
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*
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@ -899,9 +899,10 @@
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* a sensible size or 0. If the parameters are not valid,
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* the return value is unspecified.
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*/
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/* FFDH is not yet supported in PSA. */
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#define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits) \
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(PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? \
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2 * PSA_BITS_TO_BYTES(key_bits) : \
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PSA_BITS_TO_BYTES(key_bits) : \
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0)
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/** Maximum size of the output from psa_raw_key_agreement().
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@ -914,7 +915,7 @@
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* See also #PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(\p key_type, \p key_bits).
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*/
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#define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE \
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(2 * PSA_BITS_TO_BYTES(key_bits))
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(PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS))
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/** The default IV size for a cipher algorithm, in bytes.
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*
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@ -968,9 +969,9 @@
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*
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* See also #PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(\p input_length).
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*
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* \warning This function can evaluate its arguments multiple times or
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* zero times. Providing arguments that have side effects will
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* result in implementation-specific behavior, and is non-portable.
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* \warning This macro may evaluate its arguments multiple times or
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* zero times, so you should not pass arguments that contain
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* side effects.
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*
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* \param key_type A symmetric key type that is compatible with algorithm
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* alg.
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@ -981,18 +982,16 @@
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* \return A sufficient output size for the specified key type and
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* algorithm. If the key type or cipher algorithm is not
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* recognized, or the parameters are incompatible,
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* return 0. An implementation can return either 0 or
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* a correct size for a key type and cipher algorithm
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* that it recognizes, but does not support.
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* return 0.
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*/
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#define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
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(PSA_ALG_IS_CIPHER(alg) && \
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((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
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(alg == PSA_ALG_CBC_PKCS7 ? \
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PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
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(input_length) + PSA_CIPHER_IV_LENGTH(key_type, alg)) : \
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(input_length) + PSA_CIPHER_IV_LENGTH(key_type, alg) ) : \
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0)
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#define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
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(alg == PSA_ALG_CBC_PKCS7 ? \
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PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
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(input_length) + PSA_CIPHER_IV_LENGTH((key_type), \
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(alg))) : \
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(PSA_ALG_IS_CIPHER(alg) ? \
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(input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
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0))
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/** A sufficient output buffer size for psa_cipher_encrypt(), for any of the
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* supported key types and cipher algorithms.
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* for a key type and cipher algorithm that it recognizes,
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* but does not support.
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*/
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#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
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(PSA_ALG_IS_CIPHER(alg) && \
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((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
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(input_length) + PSA_CIPHER_IV_LENGTH(key_type, alg) : \
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#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
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(PSA_ALG_IS_CIPHER(alg) ? \
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(((alg) == PSA_ALG_CBC_PKCS7 || \
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(alg) == PSA_ALG_CBC_NO_PADDING || \
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(alg) == PSA_ALG_ECB_NO_PADDING) ? \
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PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
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input_length) : \
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(input_length)) : \
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0)
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/** A sufficient output buffer size for psa_cipher_update(), for any of the
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* for a key type and cipher algorithm that it recognizes,
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* but does not support.
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*/
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#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
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(PSA_ALG_IS_CIPHER(alg) && \
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((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
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(alg == PSA_ALG_CBC_PKCS7 ? \
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PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
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0) : \
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#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
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(PSA_ALG_IS_CIPHER(alg) ? \
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(alg == PSA_ALG_CBC_PKCS7 ? \
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PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
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0) : \
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0)
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/** A sufficient ciphertext buffer size for psa_cipher_finish(), for any of the
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