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 /**
  * \file psa/crypto_sizes.h
  *
  * \brief PSA cryptography module: Mbed TLS buffer size macros
  *
  * \note This file may not be included directly. Applications must
  * include psa/crypto.h.
  *
  * This file contains the definitions of macros that are useful to
  * compute buffer sizes. The signatures and semantics of these macros
  * are standardized, but the definitions are not, because they depend on
  * the available algorithms and, in some cases, on permitted tolerances
  * on buffer sizes.
  *
  * In implementations with isolation between the application and the
  * cryptography module, implementers should take care to ensure that
  * the definitions that are exposed to applications match what the
  * module implements.
  *
  * Macros that compute sizes whose values do not depend on the
  * implementation are in crypto.h.
  */
 /*
  *  Copyright The Mbed TLS Contributors
  *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
  */
 
 #ifndef PSA_CRYPTO_SIZES_H
 #define PSA_CRYPTO_SIZES_H
 
 /*
  * Include the build-time configuration information header. Here, we do not
  * include `"mbedtls/build_info.h"` directly but `"psa/build_info.h"`, which
  * is basically just an alias to it. This is to ease the maintenance of the
  * TF-PSA-Crypto repository which has a different build system and
  * configuration.
  */
 #include "psa/build_info.h"
 
 #define PSA_BITS_TO_BYTES(bits) (((bits) + 7u) / 8u)
 #define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8u)
 #define PSA_MAX_OF_THREE(a, b, c) ((a) <= (b) ? (b) <= (c) ? \
                                    (c) : (b) : (a) <= (c) ? (c) : (a))
 
 #define PSA_ROUND_UP_TO_MULTIPLE(block_size, length) \
     (((length) + (block_size) - 1) / (block_size) * (block_size))
 
 /** The size of the output of psa_hash_finish(), in bytes.
  *
  * This is also the hash size that psa_hash_verify() expects.
  *
  * \param alg   A hash algorithm (\c PSA_ALG_XXX value such that
  *              #PSA_ALG_IS_HASH(\p alg) is true), or an HMAC algorithm
  *              (#PSA_ALG_HMAC(\c hash_alg) where \c hash_alg is a
  *              hash algorithm).
  *
  * \return The hash size for the specified hash algorithm.
  *         If the hash algorithm is not recognized, return 0.
  */
 #define PSA_HASH_LENGTH(alg)                                        \
     (                                                               \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16u :           \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20u :     \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20u :         \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 28u :       \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 32u :       \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 48u :       \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 64u :       \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 28u :   \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 32u :   \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 28u :      \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 32u :      \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 48u :      \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 64u :      \
         0u)
 
 /** The input block size of a hash algorithm, in bytes.
  *
  * Hash algorithms process their input data in blocks. Hash operations will
  * retain any partial blocks until they have enough input to fill the block or
  * until the operation is finished.
  * This affects the output from psa_hash_suspend().
  *
  * \param alg   A hash algorithm (\c PSA_ALG_XXX value such that
  *              PSA_ALG_IS_HASH(\p alg) is true).
  *
  * \return      The block size in bytes for the specified hash algorithm.
  *              If the hash algorithm is not recognized, return 0.
  *              An implementation can return either 0 or the correct size for a
  *              hash algorithm that it recognizes, but does not support.
  */
 #define PSA_HASH_BLOCK_LENGTH(alg)                                  \
     (                                                               \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 64u :           \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 64u :     \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 64u :         \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_224 ? 64u :       \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_256 ? 64u :       \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_384 ? 128u :      \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512 ? 128u :      \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_224 ? 128u :  \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_512_256 ? 128u :  \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_224 ? 144u :     \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_256 ? 136u :     \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_384 ? 104u :     \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA3_512 ? 72u :      \
         0u)
 
 /** \def PSA_HASH_MAX_SIZE
  *
  * Maximum size of a hash.
  *
  * This macro expands to a compile-time constant integer. This value
  * is the maximum size of a hash in bytes.
  */
 /* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-224,
  * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
  * HMAC-SHA3-512. */
 /* Note: PSA_HASH_MAX_SIZE should be kept in sync with MBEDTLS_MD_MAX_SIZE,
  * see the note on MBEDTLS_MD_MAX_SIZE for details. */
 #if defined(PSA_WANT_ALG_SHA3_224)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 144u
 #elif defined(PSA_WANT_ALG_SHA3_256)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 136u
 #elif defined(PSA_WANT_ALG_SHA_512)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128u
 #elif defined(PSA_WANT_ALG_SHA_384)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 128u
 #elif defined(PSA_WANT_ALG_SHA3_384)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 104u
 #elif defined(PSA_WANT_ALG_SHA3_512)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 72u
 #elif defined(PSA_WANT_ALG_SHA_256)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
 #elif defined(PSA_WANT_ALG_SHA_224)
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
 #else /* SHA-1 or smaller */
 #define PSA_HMAC_MAX_HASH_BLOCK_SIZE 64u
 #endif
 
 #if defined(PSA_WANT_ALG_SHA_512) || defined(PSA_WANT_ALG_SHA3_512)
 #define PSA_HASH_MAX_SIZE 64u
 #elif defined(PSA_WANT_ALG_SHA_384) || defined(PSA_WANT_ALG_SHA3_384)
 #define PSA_HASH_MAX_SIZE 48u
 #elif defined(PSA_WANT_ALG_SHA_256) || defined(PSA_WANT_ALG_SHA3_256)
 #define PSA_HASH_MAX_SIZE 32u
 #elif defined(PSA_WANT_ALG_SHA_224) || defined(PSA_WANT_ALG_SHA3_224)
 #define PSA_HASH_MAX_SIZE 28u
 #else /* SHA-1 or smaller */
 #define PSA_HASH_MAX_SIZE 20u
 #endif
 
 /** \def PSA_MAC_MAX_SIZE
  *
  * Maximum size of a MAC.
  *
  * This macro expands to a compile-time constant integer. This value
  * is the maximum size of a MAC in bytes.
  */
 /* All non-HMAC MACs have a maximum size that's smaller than the
  * minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */
 /* Note that the encoding of truncated MAC algorithms limits this value
  * to 64 bytes.
  */
 #define PSA_MAC_MAX_SIZE PSA_HASH_MAX_SIZE
 
 /** The length of a tag for an AEAD algorithm, in bytes.
  *
  * This macro can be used to allocate a buffer of sufficient size to store the
  * tag output from psa_aead_finish().
  *
  * See also #PSA_AEAD_TAG_MAX_SIZE.
  *
  * \param key_type            The type of the AEAD key.
  * \param key_bits            The size of the AEAD key in bits.
  * \param alg                 An AEAD algorithm
  *                            (\c PSA_ALG_XXX value such that
  *                            #PSA_ALG_IS_AEAD(\p alg) is true).
  *
  * \return                    The tag length for the specified algorithm and key.
  *                            If the AEAD algorithm does not have an identified
  *                            tag that can be distinguished from the rest of
  *                            the ciphertext, return 0.
  *                            If the key type or AEAD algorithm is not
  *                            recognized, or the parameters are incompatible,
  *                            return 0.
  */
 #define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg)                        \
     (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ?                            \
      PSA_ALG_AEAD_GET_TAG_LENGTH(alg) :                                     \
      ((void) (key_bits), 0u))
 
 /** The maximum tag size for all supported AEAD algorithms, in bytes.
  *
  * See also #PSA_AEAD_TAG_LENGTH(\p key_type, \p key_bits, \p alg).
  */
 #define PSA_AEAD_TAG_MAX_SIZE       16u
 
 /* The maximum size of an RSA key on this implementation, in bits.
  * This is a vendor-specific macro.
  *
  * Mbed TLS does not set a hard limit on the size of RSA keys: any key
  * whose parameters fit in a bignum is accepted. However large keys can
  * induce a large memory usage and long computation times. Unlike other
  * auxiliary macros in this file and in crypto.h, which reflect how the
  * library is configured, this macro defines how the library is
  * configured. This implementation refuses to import or generate an
  * RSA key whose size is larger than the value defined here.
  *
  * Note that an implementation may set different size limits for different
  * operations, and does not need to accept all key sizes up to the limit. */
 #define PSA_VENDOR_RSA_MAX_KEY_BITS 4096u
 
 /* The minimum size of an RSA key on this implementation, in bits.
  * This is a vendor-specific macro.
  *
  * Limits RSA key generation to a minimum due to avoid accidental misuse.
  * This value cannot be less than 128 bits.
  */
 #if defined(MBEDTLS_RSA_GEN_KEY_MIN_BITS)
 #define PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS MBEDTLS_RSA_GEN_KEY_MIN_BITS
 #else
 #define PSA_VENDOR_RSA_GENERATE_MIN_KEY_BITS 1024
 #endif
 
 /* The maximum size of an DH key on this implementation, in bits.
  * This is a vendor-specific macro.*/
 #if defined(PSA_WANT_DH_RFC7919_8192)
 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 8192u
 #elif defined(PSA_WANT_DH_RFC7919_6144)
 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 6144u
 #elif defined(PSA_WANT_DH_RFC7919_4096)
 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 4096u
 #elif defined(PSA_WANT_DH_RFC7919_3072)
 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 3072u
 #elif defined(PSA_WANT_DH_RFC7919_2048)
 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 2048u
 #else
 #define PSA_VENDOR_FFDH_MAX_KEY_BITS 0u
 #endif
 
 /* The maximum size of an ECC key on this implementation, in bits.
  * This is a vendor-specific macro. */
 #if defined(PSA_WANT_ECC_SECP_R1_521)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 521u
 #elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_512)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 512u
 #elif defined(PSA_WANT_ECC_MONTGOMERY_448)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 448u
 #elif defined(PSA_WANT_ECC_SECP_R1_384)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 384u
 #elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_384)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 384u
 #elif defined(PSA_WANT_ECC_SECP_R1_256)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
 #elif defined(PSA_WANT_ECC_SECP_K1_256)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
 #elif defined(PSA_WANT_ECC_BRAINPOOL_P_R1_256)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 256u
 #elif defined(PSA_WANT_ECC_MONTGOMERY_255)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 255u
 #elif defined(PSA_WANT_ECC_SECP_R1_224)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 224u
 #elif defined(PSA_WANT_ECC_SECP_K1_224)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 224u
 #elif defined(PSA_WANT_ECC_SECP_R1_192)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 192u
 #elif defined(PSA_WANT_ECC_SECP_K1_192)
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 192u
 #else
 #define PSA_VENDOR_ECC_MAX_CURVE_BITS 0u
 #endif
 
 /** This macro returns the maximum supported length of the PSK for the
  * TLS-1.2 PSK-to-MS key derivation
  * (#PSA_ALG_TLS12_PSK_TO_MS(\c hash_alg)).
  *
  * The maximum supported length does not depend on the chosen hash algorithm.
  *
  * Quoting RFC 4279, Sect 5.3:
  * TLS implementations supporting these ciphersuites MUST support
  * arbitrary PSK identities up to 128 octets in length, and arbitrary
  * PSKs up to 64 octets in length.  Supporting longer identities and
  * keys is RECOMMENDED.
  *
  * Therefore, no implementation should define a value smaller than 64
  * for #PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE.
  */
 #define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128u
 
 /* The expected size of input passed to psa_tls12_ecjpake_to_pms_input,
  * which is expected to work with P-256 curve only. */
 #define PSA_TLS12_ECJPAKE_TO_PMS_INPUT_SIZE 65u
 
 /* The size of a serialized K.X coordinate to be used in
  * psa_tls12_ecjpake_to_pms_input. This function only accepts the P-256
  * curve. */
 #define PSA_TLS12_ECJPAKE_TO_PMS_DATA_SIZE 32u
 
 /* The maximum number of iterations for PBKDF2 on this implementation, in bits.
  * This is a vendor-specific macro. This can be configured if necessary */
 #define PSA_VENDOR_PBKDF2_MAX_ITERATIONS 0xffffffffU
 
 /** The maximum size of a block cipher. */
 #define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16u
 
 /** The size of the output of psa_mac_sign_finish(), in bytes.
  *
  * This is also the MAC size that psa_mac_verify_finish() expects.
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type      The type of the MAC key.
  * \param key_bits      The size of the MAC key in bits.
  * \param alg           A MAC algorithm (\c PSA_ALG_XXX value such that
  *                      #PSA_ALG_IS_MAC(\p alg) is true).
  *
  * \return              The MAC size for the specified algorithm with
  *                      the specified key parameters.
  * \return              0 if the MAC algorithm is not recognized.
  * \return              Either 0 or the correct size for a MAC algorithm that
  *                      the implementation recognizes, but does not support.
  * \return              Unspecified if the key parameters are not consistent
  *                      with the algorithm.
  */
 #define PSA_MAC_LENGTH(key_type, key_bits, alg)                                   \
     ((alg) & PSA_ALG_MAC_TRUNCATION_MASK ? PSA_MAC_TRUNCATED_LENGTH(alg) :        \
      PSA_ALG_IS_HMAC(alg) ? PSA_HASH_LENGTH(PSA_ALG_HMAC_GET_HASH(alg)) :         \
      PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
      ((void) (key_type), (void) (key_bits), 0u))
 
 /** The maximum size of the output of psa_aead_encrypt(), in bytes.
  *
  * If the size of the ciphertext buffer is at least this large, it is
  * guaranteed that psa_aead_encrypt() will not fail due to an
  * insufficient buffer size. Depending on the algorithm, the actual size of
  * the ciphertext may be smaller.
  *
  * See also #PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(\p plaintext_length).
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type            A symmetric key type that is
  *                            compatible with algorithm \p alg.
  * \param alg                 An AEAD algorithm
  *                            (\c PSA_ALG_XXX value such that
  *                            #PSA_ALG_IS_AEAD(\p alg) is true).
  * \param plaintext_length    Size of the plaintext in bytes.
  *
  * \return                    The AEAD ciphertext size for the specified
  *                            algorithm.
  *                            If the key type or AEAD algorithm is not
  *                            recognized, or the parameters are incompatible,
  *                            return 0.
  */
 #define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
     (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ?                      \
      (plaintext_length) + PSA_ALG_AEAD_GET_TAG_LENGTH(alg) :          \
      0u)
 
 /** A sufficient output buffer size for psa_aead_encrypt(), for any of the
  *  supported key types and AEAD algorithms.
  *
  * If the size of the ciphertext buffer is at least this large, it is guaranteed
  * that psa_aead_encrypt() will not fail due to an insufficient buffer size.
  *
  * \note This macro returns a compile-time constant if its arguments are
  *       compile-time constants.
  *
  * See also #PSA_AEAD_ENCRYPT_OUTPUT_SIZE(\p key_type, \p alg,
  * \p plaintext_length).
  *
  * \param plaintext_length    Size of the plaintext in bytes.
  *
  * \return                    A sufficient output buffer size for any of the
  *                            supported key types and AEAD algorithms.
  *
  */
 #define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length)          \
     ((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)
 
 
 /** The maximum size of the output of psa_aead_decrypt(), in bytes.
  *
  * If the size of the plaintext buffer is at least this large, it is
  * guaranteed that psa_aead_decrypt() will not fail due to an
  * insufficient buffer size. Depending on the algorithm, the actual size of
  * the plaintext may be smaller.
  *
  * See also #PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(\p ciphertext_length).
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type            A symmetric key type that is
  *                            compatible with algorithm \p alg.
  * \param alg                 An AEAD algorithm
  *                            (\c PSA_ALG_XXX value such that
  *                            #PSA_ALG_IS_AEAD(\p alg) is true).
  * \param ciphertext_length   Size of the plaintext in bytes.
  *
  * \return                    The AEAD ciphertext size for the specified
  *                            algorithm.
  *                            If the key type or AEAD algorithm is not
  *                            recognized, or the parameters are incompatible,
  *                            return 0.
  */
 #define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
     (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 &&                      \
      (ciphertext_length) > PSA_ALG_AEAD_GET_TAG_LENGTH(alg) ?      \
      (ciphertext_length) - PSA_ALG_AEAD_GET_TAG_LENGTH(alg) :      \
      0u)
 
 /** A sufficient output buffer size for psa_aead_decrypt(), for any of the
  *  supported key types and AEAD algorithms.
  *
  * If the size of the plaintext buffer is at least this large, it is guaranteed
  * that psa_aead_decrypt() will not fail due to an insufficient buffer size.
  *
  * \note This macro returns a compile-time constant if its arguments are
  *       compile-time constants.
  *
  * See also #PSA_AEAD_DECRYPT_OUTPUT_SIZE(\p key_type, \p alg,
  * \p ciphertext_length).
  *
  * \param ciphertext_length   Size of the ciphertext in bytes.
  *
  * \return                    A sufficient output buffer size for any of the
  *                            supported key types and AEAD algorithms.
  *
  */
 #define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length)     \
     (ciphertext_length)
 
 /** The default nonce size for an AEAD algorithm, in bytes.
  *
  * This macro can be used to allocate a buffer of sufficient size to
  * store the nonce output from #psa_aead_generate_nonce().
  *
  * See also #PSA_AEAD_NONCE_MAX_SIZE.
  *
  * \note This is not the maximum size of nonce supported as input to
  *       #psa_aead_set_nonce(), #psa_aead_encrypt() or #psa_aead_decrypt(),
  *       just the default size that is generated by #psa_aead_generate_nonce().
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type  A symmetric key type that is compatible with
  *                  algorithm \p alg.
  *
  * \param alg       An AEAD algorithm (\c PSA_ALG_XXX value such that
  *                  #PSA_ALG_IS_AEAD(\p alg) is true).
  *
  * \return The default nonce size for the specified key type and algorithm.
  *         If the key type or AEAD algorithm is not recognized,
  *         or the parameters are incompatible, return 0.
  */
 #define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
     (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 ? \
      MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CCM) ? 13u : \
      MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_GCM) ? 12u : \
      0u : \
      (key_type) == PSA_KEY_TYPE_CHACHA20 && \
      MBEDTLS_PSA_ALG_AEAD_EQUAL(alg, PSA_ALG_CHACHA20_POLY1305) ? 12u : \
      0u)
 
 /** The maximum default nonce size among all supported pairs of key types and
  *  AEAD algorithms, in bytes.
  *
  * This is equal to or greater than any value that #PSA_AEAD_NONCE_LENGTH()
  * may return.
  *
  * \note This is not the maximum size of nonce supported as input to
  *       #psa_aead_set_nonce(), #psa_aead_encrypt() or #psa_aead_decrypt(),
  *       just the largest size that may be generated by
  *       #psa_aead_generate_nonce().
  */
 #define PSA_AEAD_NONCE_MAX_SIZE 13u
 
 /** A sufficient output buffer size for psa_aead_update().
  *
  * If the size of the output buffer is at least this large, it is
  * guaranteed that psa_aead_update() will not fail due to an
  * insufficient buffer size. The actual size of the output may be smaller
  * in any given call.
  *
  * See also #PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(\p input_length).
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type            A symmetric key type that is
  *                            compatible with algorithm \p alg.
  * \param alg                 An AEAD algorithm
  *                            (\c PSA_ALG_XXX value such that
  *                            #PSA_ALG_IS_AEAD(\p alg) is true).
  * \param input_length        Size of the input in bytes.
  *
  * \return                    A sufficient output buffer size for the specified
  *                            algorithm.
  *                            If the key type or AEAD algorithm is not
  *                            recognized, or the parameters are incompatible,
  *                            return 0.
  */
 /* For all the AEAD modes defined in this specification, it is possible
  * to emit output without delay. However, hardware may not always be
  * capable of this. So for modes based on a block cipher, allow the
  * implementation to delay the output until it has a full block. */
 #define PSA_AEAD_UPDATE_OUTPUT_SIZE(key_type, alg, input_length)                             \
     (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ?                                             \
      PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ?                                              \
      PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), (input_length)) : \
      (input_length) : \
      0u)
 
 /** A sufficient output buffer size for psa_aead_update(), for any of the
  *  supported key types and AEAD algorithms.
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_aead_update() will not fail due to an insufficient buffer size.
  *
  * See also #PSA_AEAD_UPDATE_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
  *
  * \param input_length      Size of the input in bytes.
  */
 #define PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(input_length)                           \
     (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)))
 
 /** A sufficient ciphertext buffer size for psa_aead_finish().
  *
  * If the size of the ciphertext buffer is at least this large, it is
  * guaranteed that psa_aead_finish() will not fail due to an
  * insufficient ciphertext buffer size. The actual size of the output may
  * be smaller in any given call.
  *
  * See also #PSA_AEAD_FINISH_OUTPUT_MAX_SIZE.
  *
  * \param key_type            A symmetric key type that is
                               compatible with algorithm \p alg.
  * \param alg                 An AEAD algorithm
  *                            (\c PSA_ALG_XXX value such that
  *                            #PSA_ALG_IS_AEAD(\p alg) is true).
  *
  * \return                    A sufficient ciphertext buffer size for the
  *                            specified algorithm.
  *                            If the key type or AEAD algorithm is not
  *                            recognized, or the parameters are incompatible,
  *                            return 0.
  */
 #define PSA_AEAD_FINISH_OUTPUT_SIZE(key_type, alg) \
     (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 &&  \
      PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ?    \
      PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
      0u)
 
 /** A sufficient ciphertext buffer size for psa_aead_finish(), for any of the
  *  supported key types and AEAD algorithms.
  *
  * See also #PSA_AEAD_FINISH_OUTPUT_SIZE(\p key_type, \p alg).
  */
 #define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE     (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
 
 /** A sufficient plaintext buffer size for psa_aead_verify().
  *
  * If the size of the plaintext buffer is at least this large, it is
  * guaranteed that psa_aead_verify() will not fail due to an
  * insufficient plaintext buffer size. The actual size of the output may
  * be smaller in any given call.
  *
  * See also #PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE.
  *
  * \param key_type            A symmetric key type that is
  *                            compatible with algorithm \p alg.
  * \param alg                 An AEAD algorithm
  *                            (\c PSA_ALG_XXX value such that
  *                            #PSA_ALG_IS_AEAD(\p alg) is true).
  *
  * \return                    A sufficient plaintext buffer size for the
  *                            specified algorithm.
  *                            If the key type or AEAD algorithm is not
  *                            recognized, or the parameters are incompatible,
  *                            return 0.
  */
 #define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \
     (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 &&  \
      PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ?    \
      PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
      0u)
 
 /** A sufficient plaintext buffer size for psa_aead_verify(), for any of the
  *  supported key types and AEAD algorithms.
  *
  * See also #PSA_AEAD_VERIFY_OUTPUT_SIZE(\p key_type, \p alg).
  */
 #define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE     (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
 
 #define PSA_RSA_MINIMUM_PADDING_SIZE(alg)                         \
     (PSA_ALG_IS_RSA_OAEP(alg) ?                                   \
      2u * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1u :   \
      11u /*PKCS#1v1.5*/)
 
 /**
  * \brief ECDSA signature size for a given curve bit size
  *
  * \param curve_bits    Curve size in bits.
  * \return              Signature size in bytes.
  *
  * \note This macro returns a compile-time constant if its argument is one.
  */
 #define PSA_ECDSA_SIGNATURE_SIZE(curve_bits)    \
     (PSA_BITS_TO_BYTES(curve_bits) * 2u)
 
 /** Sufficient signature buffer size for psa_sign_hash().
  *
  * This macro returns a sufficient buffer size for a signature using a key
  * of the specified type and size, with the specified algorithm.
  * Note that the actual size of the signature may be smaller
  * (some algorithms produce a variable-size signature).
  *
  * \warning This function may call its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type  An asymmetric key type (this may indifferently be a
  *                  key pair type or a public key type).
  * \param key_bits  The size of the key in bits.
  * \param alg       The signature algorithm.
  *
  * \return If the parameters are valid and supported, return
  *         a buffer size in bytes that guarantees that
  *         psa_sign_hash() will not fail with
  *         #PSA_ERROR_BUFFER_TOO_SMALL.
  *         If the parameters are a valid combination that is not supported,
  *         return either a sensible size or 0.
  *         If the parameters are not valid, the
  *         return value is unspecified.
  */
 #define PSA_SIGN_OUTPUT_SIZE(key_type, key_bits, alg)        \
     (PSA_KEY_TYPE_IS_RSA(key_type) ? ((void) alg, PSA_BITS_TO_BYTES(key_bits)) : \
      PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_ECDSA_SIGNATURE_SIZE(key_bits) : \
      ((void) alg, 0u))
 
 #define PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE     \
     PSA_ECDSA_SIGNATURE_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
 
 /** \def PSA_SIGNATURE_MAX_SIZE
  *
  * Maximum size of an asymmetric signature.
  *
  * This macro expands to a compile-time constant integer. This value
  * is the maximum size of a signature in bytes.
  */
 #define PSA_SIGNATURE_MAX_SIZE      1
 
 #if (defined(PSA_WANT_ALG_ECDSA) || defined(PSA_WANT_ALG_DETERMINISTIC_ECDSA)) && \
     (PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE > PSA_SIGNATURE_MAX_SIZE)
 #undef PSA_SIGNATURE_MAX_SIZE
 #define PSA_SIGNATURE_MAX_SIZE      PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE
 #endif
 #if (defined(PSA_WANT_ALG_RSA_PKCS1V15_SIGN) || defined(PSA_WANT_ALG_RSA_PSS)) && \
     (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_SIGNATURE_MAX_SIZE)
 #undef PSA_SIGNATURE_MAX_SIZE
 #define PSA_SIGNATURE_MAX_SIZE      PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS)
 #endif
 
 /** Sufficient output buffer size for psa_asymmetric_encrypt().
  *
  * This macro returns a sufficient buffer size for a ciphertext produced using
  * a key of the specified type and size, with the specified algorithm.
  * Note that the actual size of the ciphertext may be smaller, depending
  * on the algorithm.
  *
  * \warning This function may call its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type  An asymmetric key type (this may indifferently be a
  *                  key pair type or a public key type).
  * \param key_bits  The size of the key in bits.
  * \param alg       The asymmetric encryption algorithm.
  *
  * \return If the parameters are valid and supported, return
  *         a buffer size in bytes that guarantees that
  *         psa_asymmetric_encrypt() will not fail with
  *         #PSA_ERROR_BUFFER_TOO_SMALL.
  *         If the parameters are a valid combination that is not supported,
  *         return either a sensible size or 0.
  *         If the parameters are not valid, the
  *         return value is unspecified.
  */
 #define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(key_type, key_bits, alg)     \
     (PSA_KEY_TYPE_IS_RSA(key_type) ?                                    \
      ((void) alg, PSA_BITS_TO_BYTES(key_bits)) :                         \
      0u)
 
 /** A sufficient output buffer size for psa_asymmetric_encrypt(), for any
  *  supported asymmetric encryption.
  *
  * See also #PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(\p key_type, \p key_bits, \p alg).
  */
 /* This macro assumes that RSA is the only supported asymmetric encryption. */
 #define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE          \
     (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
 
 /** Sufficient output buffer size for psa_asymmetric_decrypt().
  *
  * This macro returns a sufficient buffer size for a plaintext produced using
  * a key of the specified type and size, with the specified algorithm.
  * Note that the actual size of the plaintext may be smaller, depending
  * on the algorithm.
  *
  * \warning This function may call its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type  An asymmetric key type (this may indifferently be a
  *                  key pair type or a public key type).
  * \param key_bits  The size of the key in bits.
  * \param alg       The asymmetric encryption algorithm.
  *
  * \return If the parameters are valid and supported, return
  *         a buffer size in bytes that guarantees that
  *         psa_asymmetric_decrypt() will not fail with
  *         #PSA_ERROR_BUFFER_TOO_SMALL.
  *         If the parameters are a valid combination that is not supported,
  *         return either a sensible size or 0.
  *         If the parameters are not valid, the
  *         return value is unspecified.
  */
 #define PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg)     \
     (PSA_KEY_TYPE_IS_RSA(key_type) ?                                    \
      PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) :  \
      0u)
 
 /** A sufficient output buffer size for psa_asymmetric_decrypt(), for any
  *  supported asymmetric decryption.
  *
  * This macro assumes that RSA is the only supported asymmetric encryption.
  *
  * See also #PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(\p key_type, \p key_bits, \p alg).
  */
 #define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE          \
     (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
 
 /* Maximum size of the ASN.1 encoding of an INTEGER with the specified
  * number of bits.
  *
  * This definition assumes that bits <= 2^19 - 9 so that the length field
  * is at most 3 bytes. The length of the encoding is the length of the
  * bit string padded to a whole number of bytes plus:
  * - 1 type byte;
  * - 1 to 3 length bytes;
  * - 0 to 1 bytes of leading 0 due to the sign bit.
  */
 #define PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(bits)      \
     ((bits) / 8u + 5u)
 
 /* Maximum size of the export encoding of an RSA public key.
  * Assumes that the public exponent is less than 2^32.
  *
  * RSAPublicKey  ::=  SEQUENCE  {
  *    modulus            INTEGER,    -- n
  *    publicExponent     INTEGER  }  -- e
  *
  * - 4 bytes of SEQUENCE overhead;
  * - n : INTEGER;
  * - 7 bytes for the public exponent.
  */
 #define PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits)        \
     (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) + 11u)
 
 /* Maximum size of the export encoding of an RSA key pair.
  * Assumes that the public exponent is less than 2^32 and that the size
  * difference between the two primes is at most 1 bit.
  *
  * RSAPrivateKey ::= SEQUENCE {
  *     version           Version,  -- 0
  *     modulus           INTEGER,  -- N-bit
  *     publicExponent    INTEGER,  -- 32-bit
  *     privateExponent   INTEGER,  -- N-bit
  *     prime1            INTEGER,  -- N/2-bit
  *     prime2            INTEGER,  -- N/2-bit
  *     exponent1         INTEGER,  -- N/2-bit
  *     exponent2         INTEGER,  -- N/2-bit
  *     coefficient       INTEGER,  -- N/2-bit
  * }
  *
  * - 4 bytes of SEQUENCE overhead;
  * - 3 bytes of version;
  * - 7 half-size INTEGERs plus 2 full-size INTEGERs,
  *   overapproximated as 9 half-size INTEGERS;
  * - 7 bytes for the public exponent.
  */
 #define PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits)   \
     (9u * PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE((key_bits) / 2u + 1u) + 14u)
 
 /* Maximum size of the export encoding of a DSA public key.
  *
  * SubjectPublicKeyInfo  ::=  SEQUENCE  {
  *      algorithm            AlgorithmIdentifier,
  *      subjectPublicKey     BIT STRING  } -- contains DSAPublicKey
  * AlgorithmIdentifier  ::=  SEQUENCE  {
  *      algorithm               OBJECT IDENTIFIER,
  *      parameters              Dss-Params  } -- SEQUENCE of 3 INTEGERs
  * DSAPublicKey  ::=  INTEGER -- public key, Y
  *
  * - 3 * 4 bytes of SEQUENCE overhead;
  * - 1 + 1 + 7 bytes of algorithm (DSA OID);
  * - 4 bytes of BIT STRING overhead;
  * - 3 full-size INTEGERs (p, g, y);
  * - 1 + 1 + 32 bytes for 1 sub-size INTEGER (q <= 256 bits).
  */
 #define PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits)        \
     (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3u + 59u)
 
 /* Maximum size of the export encoding of a DSA key pair.
  *
  * DSAPrivateKey ::= SEQUENCE {
  *     version             Version,  -- 0
  *     prime               INTEGER,  -- p
  *     subprime            INTEGER,  -- q
  *     generator           INTEGER,  -- g
  *     public              INTEGER,  -- y
  *     private             INTEGER,  -- x
  * }
  *
  * - 4 bytes of SEQUENCE overhead;
  * - 3 bytes of version;
  * - 3 full-size INTEGERs (p, g, y);
  * - 2 * (1 + 1 + 32) bytes for 2 sub-size INTEGERs (q, x <= 256 bits).
  */
 #define PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits)   \
     (PSA_KEY_EXPORT_ASN1_INTEGER_MAX_SIZE(key_bits) * 3u + 75u)
 
 /* Maximum size of the export encoding of an ECC public key.
  *
  * The representation of an ECC public key is:
  *      - The byte 0x04;
  *      - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
  *      - `y_P` as a `ceiling(m/8)`-byte string, big-endian;
  *      - where m is the bit size associated with the curve.
  *
  * - 1 byte + 2 * point size.
  */
 #define PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits)        \
     (2u * PSA_BITS_TO_BYTES(key_bits) + 1u)
 
 /* Maximum size of the export encoding of an ECC key pair.
  *
  * An ECC key pair is represented by the secret value.
  */
 #define PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits)   \
     (PSA_BITS_TO_BYTES(key_bits))
 
 /* Maximum size of the export encoding of an DH key pair.
  *
  * An DH key pair is represented by the secret value.
  */
 #define PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(key_bits)   \
     (PSA_BITS_TO_BYTES(key_bits))
 
 /* Maximum size of the export encoding of an DH public key.
  */
 #define PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(key_bits)   \
     (PSA_BITS_TO_BYTES(key_bits))
 
 /** Sufficient output buffer size for psa_export_key() or
  * psa_export_public_key().
  *
  * This macro returns a compile-time constant if its arguments are
  * compile-time constants.
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * The following code illustrates how to allocate enough memory to export
  * a key by querying the key type and size at runtime.
  * \code{c}
  * psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
  * psa_status_t status;
  * status = psa_get_key_attributes(key, &attributes);
  * if (status != PSA_SUCCESS) handle_error(...);
  * psa_key_type_t key_type = psa_get_key_type(&attributes);
  * size_t key_bits = psa_get_key_bits(&attributes);
  * size_t buffer_size = PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits);
  * psa_reset_key_attributes(&attributes);
  * uint8_t *buffer = malloc(buffer_size);
  * if (buffer == NULL) handle_error(...);
  * size_t buffer_length;
  * status = psa_export_key(key, buffer, buffer_size, &buffer_length);
  * if (status != PSA_SUCCESS) handle_error(...);
  * \endcode
  *
  * \param key_type  A supported key type.
  * \param key_bits  The size of the key in bits.
  *
  * \return If the parameters are valid and supported, return
  *         a buffer size in bytes that guarantees that
  *         psa_export_key() or psa_export_public_key() will not fail with
  *         #PSA_ERROR_BUFFER_TOO_SMALL.
  *         If the parameters are a valid combination that is not supported,
  *         return either a sensible size or 0.
  *         If the parameters are not valid, the return value is unspecified.
  */
 #define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits)                                              \
     (PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) :                         \
      PSA_KEY_TYPE_IS_DH(key_type) ? PSA_BITS_TO_BYTES(key_bits) :                                   \
      (key_type) == PSA_KEY_TYPE_RSA_KEY_PAIR ? PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(key_bits) :     \
      (key_type) == PSA_KEY_TYPE_RSA_PUBLIC_KEY ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
      (key_type) == PSA_KEY_TYPE_DSA_KEY_PAIR ? PSA_KEY_EXPORT_DSA_KEY_PAIR_MAX_SIZE(key_bits) :     \
      (key_type) == PSA_KEY_TYPE_DSA_PUBLIC_KEY ? PSA_KEY_EXPORT_DSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
      PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(key_bits) :      \
      PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) :  \
      0u)
 
 /** Sufficient output buffer size for psa_export_public_key().
  *
  * This macro returns a compile-time constant if its arguments are
  * compile-time constants.
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * The following code illustrates how to allocate enough memory to export
  * a public key by querying the key type and size at runtime.
  * \code{c}
  * psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
  * psa_status_t status;
  * status = psa_get_key_attributes(key, &attributes);
  * if (status != PSA_SUCCESS) handle_error(...);
  * psa_key_type_t key_type = psa_get_key_type(&attributes);
  * size_t key_bits = psa_get_key_bits(&attributes);
  * size_t buffer_size = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits);
  * psa_reset_key_attributes(&attributes);
  * uint8_t *buffer = malloc(buffer_size);
  * if (buffer == NULL) handle_error(...);
  * size_t buffer_length;
  * status = psa_export_public_key(key, buffer, buffer_size, &buffer_length);
  * if (status != PSA_SUCCESS) handle_error(...);
  * \endcode
  *
  * \param key_type      A public key or key pair key type.
  * \param key_bits      The size of the key in bits.
  *
  * \return              If the parameters are valid and supported, return
  *                      a buffer size in bytes that guarantees that
  *                      psa_export_public_key() will not fail with
  *                      #PSA_ERROR_BUFFER_TOO_SMALL.
  *                      If the parameters are a valid combination that is not
  *                      supported, return either a sensible size or 0.
  *                      If the parameters are not valid,
  *                      the return value is unspecified.
  *
  *                      If the parameters are valid and supported,
  *                      return the same result as
  *                      #PSA_EXPORT_KEY_OUTPUT_SIZE(
  *                          \p #PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(\p key_type),
  *                          \p key_bits).
  */
 #define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits)                           \
     (PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
      PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
      PSA_KEY_TYPE_IS_DH(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
      0u)
 
 /** Sufficient buffer size for exporting any asymmetric key pair.
  *
  * This macro expands to a compile-time constant integer. This value is
  * a sufficient buffer size when calling psa_export_key() to export any
  * asymmetric key pair, regardless of the exact key type and key size.
  *
  * See also #PSA_EXPORT_KEY_OUTPUT_SIZE(\p key_type, \p key_bits).
  */
 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE            1
 
 #if defined(PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_BASIC) && \
     (PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
      PSA_EXPORT_KEY_PAIR_MAX_SIZE)
 #undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE    \
     PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
 #endif
 #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) && \
     (PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
      PSA_EXPORT_KEY_PAIR_MAX_SIZE)
 #undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE    \
     PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
 #endif
 #if defined(PSA_WANT_KEY_TYPE_DH_KEY_PAIR_BASIC) && \
     (PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS) > \
      PSA_EXPORT_KEY_PAIR_MAX_SIZE)
 #undef PSA_EXPORT_KEY_PAIR_MAX_SIZE
 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE    \
     PSA_KEY_EXPORT_FFDH_KEY_PAIR_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS)
 #endif
 
 /** Sufficient buffer size for exporting any asymmetric public key.
  *
  * This macro expands to a compile-time constant integer. This value is
  * a sufficient buffer size when calling psa_export_key() or
  * psa_export_public_key() to export any asymmetric public key,
  * regardless of the exact key type and key size.
  *
  * See also #PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(\p key_type, \p key_bits).
  */
 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE            1
 
 #if defined(PSA_WANT_KEY_TYPE_ECC_PUBLIC_KEY) && \
     (PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
      PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
 #undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE    \
     PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)
 #endif
 #if defined(PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY) && \
     (PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
      PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
 #undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE    \
     PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS)
 #endif
 #if defined(PSA_WANT_KEY_TYPE_DH_PUBLIC_KEY) && \
     (PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS) > \
      PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
 #undef PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
 #define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE    \
     PSA_KEY_EXPORT_FFDH_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_FFDH_MAX_KEY_BITS)
 #endif
 
 /** Sufficient output buffer size for psa_raw_key_agreement().
  *
  * This macro returns a compile-time constant if its arguments are
  * compile-time constants.
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * See also #PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE.
  *
  * \param key_type      A supported key type.
  * \param key_bits      The size of the key in bits.
  *
  * \return              If the parameters are valid and supported, return
  *                      a buffer size in bytes that guarantees that
  *                      psa_raw_key_agreement() will not fail with
  *                      #PSA_ERROR_BUFFER_TOO_SMALL.
  *                      If the parameters are a valid combination that
  *                      is not supported, return either a sensible size or 0.
  *                      If the parameters are not valid,
  *                      the return value is unspecified.
  */
 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits)   \
     ((PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) || \
       PSA_KEY_TYPE_IS_DH_KEY_PAIR(key_type)) ? PSA_BITS_TO_BYTES(key_bits) : 0u)
 
 /** Maximum size of the output from psa_raw_key_agreement().
  *
  * This macro expands to a compile-time constant integer. This value is the
  * maximum size of the output any raw key agreement algorithm, in bytes.
  *
  * See also #PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(\p key_type, \p key_bits).
  */
 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE       1
 
 #if defined(PSA_WANT_ALG_ECDH) && \
     (PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS) > PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE)
 #undef PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE
 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE    PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS)
 #endif
 #if defined(PSA_WANT_ALG_FFDH) && \
     (PSA_BITS_TO_BYTES(PSA_VENDOR_FFDH_MAX_KEY_BITS) > PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE)
 #undef PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE
 #define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE    PSA_BITS_TO_BYTES(PSA_VENDOR_FFDH_MAX_KEY_BITS)
 #endif
 
 /** The default IV size for a cipher algorithm, in bytes.
  *
  * The IV that is generated as part of a call to #psa_cipher_encrypt() is always
  * the default IV length for the algorithm.
  *
  * This macro can be used to allocate a buffer of sufficient size to
  * store the IV output from #psa_cipher_generate_iv() when using
  * a multi-part cipher operation.
  *
  * See also #PSA_CIPHER_IV_MAX_SIZE.
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type  A symmetric key type that is compatible with algorithm \p alg.
  *
  * \param alg       A cipher algorithm (\c PSA_ALG_XXX value such that #PSA_ALG_IS_CIPHER(\p alg) is true).
  *
  * \return The default IV size for the specified key type and algorithm.
  *         If the algorithm does not use an IV, return 0.
  *         If the key type or cipher algorithm is not recognized,
  *         or the parameters are incompatible, return 0.
  */
 #define PSA_CIPHER_IV_LENGTH(key_type, alg) \
     (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
      ((alg) == PSA_ALG_CTR || \
       (alg) == PSA_ALG_CFB || \
       (alg) == PSA_ALG_OFB || \
       (alg) == PSA_ALG_XTS || \
       (alg) == PSA_ALG_CBC_NO_PADDING || \
       (alg) == PSA_ALG_CBC_PKCS7) ? PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
      (key_type) == PSA_KEY_TYPE_CHACHA20 && \
      (alg) == PSA_ALG_STREAM_CIPHER ? 12u : \
      (alg) == PSA_ALG_CCM_STAR_NO_TAG ? 13u : \
      0u)
 
 /** The maximum IV size for all supported cipher algorithms, in bytes.
  *
  * See also #PSA_CIPHER_IV_LENGTH().
  */
 #define PSA_CIPHER_IV_MAX_SIZE 16u
 
 /** The maximum size of the output of psa_cipher_encrypt(), in bytes.
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_cipher_encrypt() will not fail due to an insufficient buffer size.
  * Depending on the algorithm, the actual size of the output might be smaller.
  *
  * See also #PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(\p input_length).
  *
  * \warning This macro may evaluate its arguments multiple times or
  *          zero times, so you should not pass arguments that contain
  *          side effects.
  *
  * \param key_type      A symmetric key type that is compatible with algorithm
  *                      alg.
  * \param alg           A cipher algorithm (\c PSA_ALG_XXX value such that
  *                      #PSA_ALG_IS_CIPHER(\p alg) is true).
  * \param input_length  Size of the input in bytes.
  *
  * \return              A sufficient output size for the specified key type and
  *                      algorithm. If the key type or cipher algorithm is not
  *                      recognized, or the parameters are incompatible,
  *                      return 0.
  */
 #define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length)     \
     (alg == PSA_ALG_CBC_PKCS7 ?                                         \
      (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ?                    \
       PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
                                (input_length) + 1u) +                   \
       PSA_CIPHER_IV_LENGTH((key_type), (alg)) : 0u) :                   \
      (PSA_ALG_IS_CIPHER(alg) ?                                          \
       (input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) :        \
       0u))
 
 /** A sufficient output buffer size for psa_cipher_encrypt(), for any of the
  *  supported key types and cipher algorithms.
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_cipher_encrypt() will not fail due to an insufficient buffer size.
  *
  * See also #PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
  *
  * \param input_length  Size of the input in bytes.
  *
  */
 #define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length)                \
     (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE,          \
                               (input_length) + 1u) +                    \
      PSA_CIPHER_IV_MAX_SIZE)
 
 /** The maximum size of the output of psa_cipher_decrypt(), in bytes.
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_cipher_decrypt() will not fail due to an insufficient buffer size.
  * Depending on the algorithm, the actual size of the output might be smaller.
  *
  * See also #PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(\p input_length).
  *
  * \param key_type      A symmetric key type that is compatible with algorithm
  *                      alg.
  * \param alg           A cipher algorithm (\c PSA_ALG_XXX value such that
  *                      #PSA_ALG_IS_CIPHER(\p alg) is true).
  * \param input_length  Size of the input in bytes.
  *
  * \return              A sufficient output size for the specified key type and
  *                      algorithm. If the key type or cipher algorithm is not
  *                      recognized, or the parameters are incompatible,
  *                      return 0.
  */
 #define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length)     \
     (PSA_ALG_IS_CIPHER(alg) &&                                          \
      ((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
      (input_length) :                                                   \
      0u)
 
 /** A sufficient output buffer size for psa_cipher_decrypt(), for any of the
  *  supported key types and cipher algorithms.
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_cipher_decrypt() will not fail due to an insufficient buffer size.
  *
  * See also #PSA_CIPHER_DECRYPT_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
  *
  * \param input_length  Size of the input in bytes.
  */
 #define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length)    \
     (input_length)
 
 /** A sufficient output buffer size for psa_cipher_update().
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_cipher_update() will not fail due to an insufficient buffer size.
  * The actual size of the output might be smaller in any given call.
  *
  * See also #PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(\p input_length).
  *
  * \param key_type      A symmetric key type that is compatible with algorithm
  *                      alg.
  * \param alg           A cipher algorithm (PSA_ALG_XXX value such that
  *                      #PSA_ALG_IS_CIPHER(\p alg) is true).
  * \param input_length  Size of the input in bytes.
  *
  * \return              A sufficient output size for the specified key type and
  *                      algorithm. If the key type or cipher algorithm is not
  *                      recognized, or the parameters are incompatible, return 0.
  */
 #define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length)      \
     (PSA_ALG_IS_CIPHER(alg) ?                                           \
      (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ?                    \
       (((alg) == PSA_ALG_CBC_PKCS7      ||                              \
         (alg) == PSA_ALG_CBC_NO_PADDING ||                              \
         (alg) == PSA_ALG_ECB_NO_PADDING) ?                              \
        PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
                                 input_length) :                         \
        (input_length)) : 0u) :                                          \
      0u)
 
 /** A sufficient output buffer size for psa_cipher_update(), for any of the
  *  supported key types and cipher algorithms.
  *
  * If the size of the output buffer is at least this large, it is guaranteed
  * that psa_cipher_update() will not fail due to an insufficient buffer size.
  *
  * See also #PSA_CIPHER_UPDATE_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
  *
  * \param input_length  Size of the input in bytes.
  */
 #define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length)     \
     (PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, input_length))
 
 /** A sufficient ciphertext buffer size for psa_cipher_finish().
  *
  * If the size of the ciphertext buffer is at least this large, it is
  * guaranteed that psa_cipher_finish() will not fail due to an insufficient
  * ciphertext buffer size. The actual size of the output might be smaller in
  * any given call.
  *
  * See also #PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE().
  *
  * \param key_type      A symmetric key type that is compatible with algorithm
  *                      alg.
  * \param alg           A cipher algorithm (PSA_ALG_XXX value such that
  *                      #PSA_ALG_IS_CIPHER(\p alg) is true).
  * \return              A sufficient output size for the specified key type and
  *                      algorithm. If the key type or cipher algorithm is not
  *                      recognized, or the parameters are incompatible, return 0.
  */
 #define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg)    \
     (PSA_ALG_IS_CIPHER(alg) ?                           \
      (alg == PSA_ALG_CBC_PKCS7 ?                        \
       PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) :         \
       0u) :                                             \
      0u)
 
 /** A sufficient ciphertext buffer size for psa_cipher_finish(), for any of the
  *  supported key types and cipher algorithms.
  *
  * See also #PSA_CIPHER_FINISH_OUTPUT_SIZE(\p key_type, \p alg).
  */
 #define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE           \
     (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
 
 #endif /* PSA_CRYPTO_SIZES_H */

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