1 /* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 * 5 * Host-side misc functions for verified boot. 6 */ 7 8 #ifndef VBOOT_REFERENCE_UTIL_MISC_H_ 9 #define VBOOT_REFERENCE_UTIL_MISC_H_ 10 11 #include "vboot_struct.h" 12 struct rsa_st; 13 14 /* Prints the sha1sum of the given VbPublicKey to stdout. */ 15 void PrintPubKeySha1Sum(VbPublicKey* key); 16 17 /* 18 * Our packed RSBPublicKey buffer (historically in files ending with ".keyb", 19 * but also the part of VbPublicKey and struct vb2_packed_key that is 20 * referenced by .key_offset) has this binary format: 21 * 22 * struct { 23 * uint32_t nwords; // size of RSA key in 32-bit words 24 * uint32_t N0inv; // -1 / N[0] mod 2^32 25 * uint32_t modulus[nwords]; // modulus as a little endian array 26 * uint32_t R2[nwords]; // R^2 as little endian array 27 * }; 28 * 29 * This function allocates and extracts that binary structure directly 30 * from the RSA private key, rather than from a file. 31 * 32 * @param rsa_private_key RSA private key (duh) 33 * @param keyb_data Pointer to newly allocated binary blob 34 * @param keyb_size Size of newly allocated binary blob 35 * 36 * @return 0 on success, non-zero if unable to allocate enough memory. 37 */ 38 int vb_keyb_from_rsa(struct rsa_st *rsa_private_key, 39 uint8_t **keyb_data, uint32_t *keyb_size); 40 41 #endif /* VBOOT_REFERENCE_UTIL_MISC_H_ */ 42
