initial commit, 4.5 stable

thirdparty/mbedtls/library/pkwrite.h

@@ -0,0 +1,121 @@
+/**
+ * \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    (38 + 2 * MBEDTLS_MPI_MAX_SIZE)
+
+/*
+ * 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  (MBEDTLS_MPI_MAX_SIZE / 2 + \
+                                 MBEDTLS_MPI_MAX_SIZE % 2)
+#define MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES    (47 + 3 * MBEDTLS_MPI_MAX_SIZE \
+                                             + 5 * MBEDTLS_MPI_MAX_SIZE_2)
+
+#else /* MBEDTLS_RSA_C */
+
+#define MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES   0
+#define MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES   0
+
+#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   (PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS) > \
+                                    MBEDTLS_ECP_MAX_BYTES ? \
+                                    PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS) : \
+                                    MBEDTLS_ECP_MAX_BYTES)
+#else /* MBEDTLS_USE_PSA_CRYPTO */
+#define MBEDTLS_PK_MAX_ECC_BYTES   MBEDTLS_ECP_MAX_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    (30 + 2 * MBEDTLS_PK_MAX_ECC_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    (29 + 3 * MBEDTLS_PK_MAX_ECC_BYTES)
+
+#else /* MBEDTLS_PK_HAVE_ECC_KEYS */
+
+#define MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES   0
+#define MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES   0
+
+#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    MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES
+#else
+#define MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE    MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES
+#endif
+
+#endif /* MBEDTLS_PK_WRITE_H */