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/* Copyright 2020 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Hash and signature algorithm parsing helpers for host utilities.
*/
#include "2common.h"
#include "2crypto.h"
#include "2rsa.h"
#include "2sha.h"
#include "2sysincludes.h"
/*
* These two need to be exported for host/lib/crypto.c, but they also need to be
* in .rodata to make coreboot XIP stages happy. We know they are immutable but
* there is no C language way to guarantee that, so we have to manually force
* the compiler to place them in .rodata. Also inject custom section flags so
* they are only allocatable (a) but not writeable (w).
*/
#ifndef CHROMEOS_ENVIRONMENT
__attribute__((section(".rodata.vb2_sig_names,\"a\"\n# ")))
#endif
const char *vb2_sig_names[VB2_SIG_ALG_COUNT] = {
[VB2_SIG_NONE] = "none",
[VB2_SIG_RSA1024] = "RSA1024",
[VB2_SIG_RSA2048] = "RSA2048",
[VB2_SIG_RSA4096] = "RSA4096",
[VB2_SIG_RSA8192] = "RSA8192",
[VB2_SIG_RSA2048_EXP3] = "RSA2048EXP3",
[VB2_SIG_RSA3072_EXP3] = "RSA3072EXP3",
};
#ifndef CHROMEOS_ENVIRONMENT
__attribute__((section(".rodata.vb2_hash_names,\"a\"\n# ")))
#endif
const char *vb2_hash_names[VB2_HASH_ALG_COUNT] = {
[VB2_HASH_NONE] = "none",
#if VB2_SUPPORT_SHA1
[VB2_HASH_SHA1] = VB2_SHA1_ALG_NAME,
#endif
#if VB2_SUPPORT_SHA256
[VB2_HASH_SHA224] = VB2_SHA224_ALG_NAME,
[VB2_HASH_SHA256] = VB2_SHA256_ALG_NAME,
#endif
#if VB2_SUPPORT_SHA512
[VB2_HASH_SHA384] = VB2_SHA384_ALG_NAME,
[VB2_HASH_SHA512] = VB2_SHA512_ALG_NAME,
#endif
};
/* The others are internal to this file. */
static const char *crypto_names[] = {
#if VB2_SUPPORT_SHA1
[VB2_ALG_RSA1024_SHA1] = "RSA1024 SHA1",
[VB2_ALG_RSA2048_SHA1] = "RSA2048 SHA1",
[VB2_ALG_RSA4096_SHA1] = "RSA4096 SHA1",
[VB2_ALG_RSA8192_SHA1] = "RSA8192 SHA1",
[VB2_ALG_RSA2048_EXP3_SHA1] = "RSA2048 EXP3 SHA1",
[VB2_ALG_RSA3072_EXP3_SHA1] = "RSA3072 EXP3 SHA1",
#endif
#if VB2_SUPPORT_SHA256
[VB2_ALG_RSA1024_SHA256] = "RSA1024 SHA256",
[VB2_ALG_RSA2048_SHA256] = "RSA2048 SHA256",
[VB2_ALG_RSA4096_SHA256] = "RSA4096 SHA256",
[VB2_ALG_RSA8192_SHA256] = "RSA8192 SHA256",
[VB2_ALG_RSA2048_EXP3_SHA256] = "RSA2048 EXP3 SHA256",
[VB2_ALG_RSA3072_EXP3_SHA256] = "RSA3072 EXP3 SHA256",
#endif
#if VB2_SUPPORT_SHA512
[VB2_ALG_RSA1024_SHA512] = "RSA1024 SHA512",
[VB2_ALG_RSA2048_SHA512] = "RSA2048 SHA512",
[VB2_ALG_RSA4096_SHA512] = "RSA4096 SHA512",
[VB2_ALG_RSA8192_SHA512] = "RSA8192 SHA512",
[VB2_ALG_RSA2048_EXP3_SHA512] = "RSA2048 EXP3 SHA512",
[VB2_ALG_RSA3072_EXP3_SHA512] = "RSA3072 EXP3 SHA512",
#endif
};
static const char *crypto_filenames[] = {
#if VB2_SUPPORT_SHA1
[VB2_ALG_RSA1024_SHA1] = "rsa1024",
[VB2_ALG_RSA2048_SHA1] = "rsa2048",
[VB2_ALG_RSA4096_SHA1] = "rsa4096",
[VB2_ALG_RSA8192_SHA1] = "rsa8192",
[VB2_ALG_RSA2048_EXP3_SHA1] = "rsa2048_exp3",
[VB2_ALG_RSA3072_EXP3_SHA1] = "rsa3072_exp3",
#endif
#if VB2_SUPPORT_SHA256
[VB2_ALG_RSA1024_SHA256] = "rsa1024",
[VB2_ALG_RSA2048_SHA256] = "rsa2048",
[VB2_ALG_RSA4096_SHA256] = "rsa4096",
[VB2_ALG_RSA8192_SHA256] = "rsa8192",
[VB2_ALG_RSA2048_EXP3_SHA256] = "rsa2048_exp3",
[VB2_ALG_RSA3072_EXP3_SHA256] = "rsa3072_exp3",
#endif
#if VB2_SUPPORT_SHA512
[VB2_ALG_RSA1024_SHA512] = "rsa1024",
[VB2_ALG_RSA2048_SHA512] = "rsa2048",
[VB2_ALG_RSA4096_SHA512] = "rsa4096",
[VB2_ALG_RSA8192_SHA512] = "rsa8192",
[VB2_ALG_RSA2048_EXP3_SHA512] = "rsa2048_exp3",
[VB2_ALG_RSA3072_EXP3_SHA512] = "rsa3072_exp3",
#endif
};
static const uint8_t crypto_to_sig[] = {
#if VB2_SUPPORT_SHA1
[VB2_ALG_RSA1024_SHA1] = VB2_SIG_RSA1024,
[VB2_ALG_RSA2048_SHA1] = VB2_SIG_RSA2048,
[VB2_ALG_RSA4096_SHA1] = VB2_SIG_RSA4096,
[VB2_ALG_RSA8192_SHA1] = VB2_SIG_RSA8192,
[VB2_ALG_RSA2048_EXP3_SHA1] = VB2_SIG_RSA2048_EXP3,
[VB2_ALG_RSA3072_EXP3_SHA1] = VB2_SIG_RSA3072_EXP3,
#endif
#if VB2_SUPPORT_SHA256
[VB2_ALG_RSA1024_SHA256] = VB2_SIG_RSA1024,
[VB2_ALG_RSA2048_SHA256] = VB2_SIG_RSA2048,
[VB2_ALG_RSA4096_SHA256] = VB2_SIG_RSA4096,
[VB2_ALG_RSA8192_SHA256] = VB2_SIG_RSA8192,
[VB2_ALG_RSA2048_EXP3_SHA256] = VB2_SIG_RSA2048_EXP3,
[VB2_ALG_RSA3072_EXP3_SHA256] = VB2_SIG_RSA3072_EXP3,
#endif
#if VB2_SUPPORT_SHA512
[VB2_ALG_RSA1024_SHA512] = VB2_SIG_RSA1024,
[VB2_ALG_RSA2048_SHA512] = VB2_SIG_RSA2048,
[VB2_ALG_RSA4096_SHA512] = VB2_SIG_RSA4096,
[VB2_ALG_RSA8192_SHA512] = VB2_SIG_RSA8192,
[VB2_ALG_RSA2048_EXP3_SHA512] = VB2_SIG_RSA2048_EXP3,
[VB2_ALG_RSA3072_EXP3_SHA512] = VB2_SIG_RSA3072_EXP3,
#endif
};
static const uint8_t crypto_to_hash[] = {
#if VB2_SUPPORT_SHA1
[VB2_ALG_RSA1024_SHA1] = VB2_HASH_SHA1,
[VB2_ALG_RSA2048_SHA1] = VB2_HASH_SHA1,
[VB2_ALG_RSA4096_SHA1] = VB2_HASH_SHA1,
[VB2_ALG_RSA8192_SHA1] = VB2_HASH_SHA1,
[VB2_ALG_RSA2048_EXP3_SHA1] = VB2_HASH_SHA1,
[VB2_ALG_RSA3072_EXP3_SHA1] = VB2_HASH_SHA1,
#endif
#if VB2_SUPPORT_SHA256
[VB2_ALG_RSA1024_SHA256] = VB2_HASH_SHA256,
[VB2_ALG_RSA2048_SHA256] = VB2_HASH_SHA256,
[VB2_ALG_RSA4096_SHA256] = VB2_HASH_SHA256,
[VB2_ALG_RSA8192_SHA256] = VB2_HASH_SHA256,
[VB2_ALG_RSA2048_EXP3_SHA256] = VB2_HASH_SHA256,
[VB2_ALG_RSA3072_EXP3_SHA256] = VB2_HASH_SHA256,
#endif
#if VB2_SUPPORT_SHA512
[VB2_ALG_RSA1024_SHA512] = VB2_HASH_SHA512,
[VB2_ALG_RSA2048_SHA512] = VB2_HASH_SHA512,
[VB2_ALG_RSA4096_SHA512] = VB2_HASH_SHA512,
[VB2_ALG_RSA8192_SHA512] = VB2_HASH_SHA512,
[VB2_ALG_RSA2048_EXP3_SHA512] = VB2_HASH_SHA512,
[VB2_ALG_RSA3072_EXP3_SHA512] = VB2_HASH_SHA512,
#endif
};
#if VB2_SUPPORT_SHA512
_Static_assert(ARRAY_SIZE(crypto_names) == VB2_ALG_COUNT, "");
_Static_assert(ARRAY_SIZE(crypto_filenames) == VB2_ALG_COUNT, "");
_Static_assert(ARRAY_SIZE(crypto_to_sig) == VB2_ALG_COUNT, "");
_Static_assert(ARRAY_SIZE(crypto_to_hash) == VB2_ALG_COUNT, "");
#endif
const char *vb2_get_hash_algorithm_name(enum vb2_hash_algorithm hash_alg)
{ if (hash_alg < ARRAY_SIZE(vb2_hash_names) && vb2_hash_names[hash_alg])
return vb2_hash_names[hash_alg];
else
return VB2_INVALID_ALG_NAME;
}
const char *vb2_get_sig_algorithm_name(enum vb2_signature_algorithm sig_alg)
{
if (sig_alg < ARRAY_SIZE(vb2_sig_names) && vb2_sig_names[sig_alg])
return vb2_sig_names[sig_alg];
else
return VB2_INVALID_ALG_NAME;
}
const char *vb2_get_crypto_algorithm_name(enum vb2_crypto_algorithm alg)
{
if (alg < ARRAY_SIZE(crypto_names) && crypto_names[alg])
return crypto_names[alg];
else
return VB2_INVALID_ALG_NAME;
}
const char *vb2_get_crypto_algorithm_file(enum vb2_crypto_algorithm alg)
{
if (alg < ARRAY_SIZE(crypto_filenames) && crypto_filenames[alg])
return crypto_filenames[alg];
else
return VB2_INVALID_ALG_NAME;
}
enum vb2_signature_algorithm vb2_crypto_to_signature(
enum vb2_crypto_algorithm algorithm)
{
if (algorithm < ARRAY_SIZE(crypto_to_sig))
return crypto_to_sig[algorithm];
else
return VB2_SIG_INVALID;
}
enum vb2_hash_algorithm vb2_crypto_to_hash(enum vb2_crypto_algorithm algorithm)
{
if (algorithm < ARRAY_SIZE(crypto_to_hash))
return crypto_to_hash[algorithm];
else
return VB2_HASH_INVALID;
}
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