1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <assert.h> 32 33 /* mbedTLS headers */ 34 #include <polarssl/memory_buffer_alloc.h> 35 36 /* 37 * mbedTLS heap 38 */ 39 #if (MBEDTLS_KEY_ALG_ID == MBEDTLS_ECDSA) 40 #define MBEDTLS_HEAP_SIZE (14*1024) 41 #elif (MBEDTLS_KEY_ALG_ID == MBEDTLS_RSA) 42 #define MBEDTLS_HEAP_SIZE (8*1024) 43 #endif 44 static unsigned char heap[MBEDTLS_HEAP_SIZE]; 45 46 /* 47 * mbedTLS initialization function 48 * 49 * Return: 0 = success, Otherwise = error 50 */ 51 void mbedtls_init(void) 52 { 53 static int ready; 54 int rc; 55 56 if (!ready) { 57 /* Initialize the mbedTLS heap */ 58 rc = memory_buffer_alloc_init(heap, MBEDTLS_HEAP_SIZE); 59 if (rc == 0) { 60 ready = 1; 61 } else { 62 assert(0); 63 } 64 } 65 } 66