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Diffstat (limited to 'include/psa/crypto_sizes.h')
| -rw-r--r-- | include/psa/crypto_sizes.h | 1282 |
1 files changed, 0 insertions, 1282 deletions
diff --git a/include/psa/crypto_sizes.h b/include/psa/crypto_sizes.h deleted file mode 100644 index d22bf10..0000000 --- a/include/psa/crypto_sizes.h +++ /dev/null @@ -1,1282 +0,0 @@ -/** - * \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 file. 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 - * PSA cryptography 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. - * - * 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_FFDH_MAX_KEY_BITS 8192u - -/* 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 */ |