/** * \file pkwrite.h * * \brief Internal defines shared by the PK write module */ /* * Copyright The Mbed TLS Contributors * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ #ifndef MBEDTLS_PK_WRITE_H #define MBEDTLS_PK_WRITE_H #include "mbedtls/build_info.h" #include "mbedtls/pk.h" #if defined(MBEDTLS_USE_PSA_CRYPTO) #include "psa/crypto.h" #endif /* MBEDTLS_USE_PSA_CRYPTO */ /* * Max sizes of key per types. Shown as tag + len (+ content). */ #if defined(MBEDTLS_RSA_C) /* * RSA public keys: * SubjectPublicKeyInfo ::= SEQUENCE { 1 + 3 * algorithm AlgorithmIdentifier, 1 + 1 (sequence) * + 1 + 1 + 9 (rsa oid) * + 1 + 1 (params null) * subjectPublicKey BIT STRING } 1 + 3 + (1 + below) * RSAPublicKey ::= SEQUENCE { 1 + 3 * modulus INTEGER, -- n 1 + 3 + MPI_MAX + 1 * publicExponent INTEGER -- e 1 + 3 + MPI_MAX + 1 * } */ #define MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES … /* * RSA private keys: * RSAPrivateKey ::= SEQUENCE { 1 + 3 * version Version, 1 + 1 + 1 * modulus INTEGER, 1 + 3 + MPI_MAX + 1 * publicExponent INTEGER, 1 + 3 + MPI_MAX + 1 * privateExponent INTEGER, 1 + 3 + MPI_MAX + 1 * prime1 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 * prime2 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 * exponent1 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 * exponent2 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 * coefficient INTEGER, 1 + 3 + MPI_MAX / 2 + 1 * otherPrimeInfos OtherPrimeInfos OPTIONAL 0 (not supported) * } */ #define MBEDTLS_MPI_MAX_SIZE_2 … #define MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES … #else /* MBEDTLS_RSA_C */ #define MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES … #define MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES … #endif /* MBEDTLS_RSA_C */ #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) /* Find the maximum number of bytes necessary to store an EC point. When USE_PSA * is defined this means looking for the maximum between PSA and built-in * supported curves. */ #if defined(MBEDTLS_USE_PSA_CRYPTO) #define MBEDTLS_PK_MAX_ECC_BYTES … #else /* MBEDTLS_USE_PSA_CRYPTO */ #define MBEDTLS_PK_MAX_ECC_BYTES … #endif /* MBEDTLS_USE_PSA_CRYPTO */ /* * EC public keys: * SubjectPublicKeyInfo ::= SEQUENCE { 1 + 2 * algorithm AlgorithmIdentifier, 1 + 1 (sequence) * + 1 + 1 + 7 (ec oid) * + 1 + 1 + 9 (namedCurve oid) * subjectPublicKey BIT STRING 1 + 2 + 1 [1] * + 1 (point format) [1] * + 2 * ECP_MAX (coords) [1] * } */ #define MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES … /* * EC private keys: * ECPrivateKey ::= SEQUENCE { 1 + 2 * version INTEGER , 1 + 1 + 1 * privateKey OCTET STRING, 1 + 1 + ECP_MAX * parameters [0] ECParameters OPTIONAL, 1 + 1 + (1 + 1 + 9) * publicKey [1] BIT STRING OPTIONAL 1 + 2 + [1] above * } */ #define MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES … #else /* MBEDTLS_PK_HAVE_ECC_KEYS */ #define MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES … #define MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES … #endif /* MBEDTLS_PK_HAVE_ECC_KEYS */ /* Define the maximum available public key DER length based on the supported * key types (EC and/or RSA). */ #if (MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES > MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES) #define MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE … #else #define MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE … #endif #endif /* MBEDTLS_PK_WRITE_H */
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