341 lines
9.6 KiB
C
341 lines
9.6 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Tests for firmware image library.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "2common.h"
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#include "2rsa.h"
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#include "2sysincludes.h"
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#include "host_common.h"
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#include "host_key2.h"
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#include "host_signature2.h"
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#include "test_common.h"
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#include "util_misc.h"
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#include "vb21_common.h"
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static const uint8_t test_data[] = "This is some test data to sign.";
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static const uint32_t test_size = sizeof(test_data);
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static void test_unpack_key(const struct vb21_packed_key *key)
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{
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struct vb2_public_key pubk;
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struct vb21_packed_key *key2;
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uint32_t size = key->c.total_size;
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/* Make a copy of the key for testing */
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key2 = (struct vb21_packed_key *)malloc(size);
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memcpy(key2, key, size);
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TEST_SUCC(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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"vb21_unpack_key() ok");
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memcpy(key2, key, size);
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key2->key_offset += 4;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_COMMON_MEMBER_SIZE,
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"vb21_unpack_key() buffer too small");
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memcpy(key2, key, size);
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key2->c.fixed_size += size;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_COMMON_FIXED_SIZE,
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"vb21_unpack_key() buffer too small for desc");
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memcpy(key2, key, size);
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key2->c.desc_size = 0;
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TEST_SUCC(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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"vb21_unpack_key() no desc");
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TEST_EQ(strcmp(pubk.desc, ""), 0, " empty desc string");
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memcpy(key2, key, size);
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key2->c.magic++;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_UNPACK_KEY_MAGIC,
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"vb21_unpack_key() bad magic");
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memcpy(key2, key, size);
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key2->c.struct_version_major++;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_UNPACK_KEY_STRUCT_VERSION,
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"vb21_unpack_key() bad major version");
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/*
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* Minor version changes are ok. Note that this test assumes that the
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* source key struct version is the highest actually known to the
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* reader. If the reader does know about minor version + 1 and that
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* adds fields, this test will likely fail. But at that point, we
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* should have already added a test for minor version compatibility to
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* handle both old and new struct versions, so someone will have
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* noticed this comment.
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*/
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memcpy(key2, key, size);
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key2->c.struct_version_minor++;
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TEST_SUCC(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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"vb21_unpack_key() minor version change ok");
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memcpy(key2, key, size);
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key2->sig_alg = VB2_SIG_INVALID;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_UNPACK_KEY_SIG_ALGORITHM,
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"vb21_unpack_key() bad sig algorithm");
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memcpy(key2, key, size);
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key2->hash_alg = VB2_HASH_INVALID;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_UNPACK_KEY_HASH_ALGORITHM,
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"vb21_unpack_key() bad hash algorithm");
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memcpy(key2, key, size);
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key2->key_size -= 4;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_UNPACK_KEY_SIZE,
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"vb21_unpack_key() invalid size");
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memcpy(key2, key, size);
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key2->key_offset--;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_COMMON_MEMBER_UNALIGNED,
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"vb21_unpack_key() unaligned data");
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memcpy(key2, key, size);
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*(uint32_t *)((uint8_t *)key2 + key2->key_offset) /= 2;
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TEST_EQ(vb21_unpack_key(&pubk, (uint8_t *)key2, size),
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VB2_ERROR_UNPACK_KEY_ARRAY_SIZE,
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"vb21_unpack_key() invalid key array size");
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free(key2);
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}
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static void test_verify_signature(const struct vb21_signature *sig)
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{
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struct vb21_signature *sig2;
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uint8_t *buf2;
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uint32_t size;
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/* Make a copy of the signature */
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size = sig->c.total_size;
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buf2 = malloc(size);
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sig2 = (struct vb21_signature *)buf2;
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memcpy(buf2, sig, size);
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TEST_SUCC(vb21_verify_signature(sig2, size), "verify_sig ok");
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sig2->c.magic = VB21_MAGIC_PACKED_KEY;
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_SIG_MAGIC,
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"verify_sig magic");
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memcpy(buf2, sig, size);
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sig2->c.total_size += 4;
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_COMMON_TOTAL_SIZE,
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"verify_sig common header");
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memcpy(buf2, sig, size);
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sig2->c.struct_version_minor++;
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TEST_SUCC(vb21_verify_signature(sig2, size), "verify_sig minor ver");
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sig2->c.struct_version_major++;
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_SIG_VERSION,
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"verify_sig major ver");
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memcpy(buf2, sig, size);
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sig2->c.fixed_size -= 4;
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sig2->c.desc_size += 4;
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_SIG_HEADER_SIZE,
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"verify_sig header size");
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memcpy(buf2, sig, size);
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sig2->sig_size += 4;
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_COMMON_MEMBER_SIZE,
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"verify_sig sig size");
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memcpy(buf2, sig, size);
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sig2->sig_alg = VB2_SIG_INVALID;
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_SIG_ALGORITHM,
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"verify_sig sig alg");
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memcpy(buf2, sig, size);
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sig2->sig_alg = (sig2->sig_alg == VB2_SIG_NONE ?
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VB2_SIG_RSA1024 : VB2_SIG_NONE);
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TEST_EQ(vb21_verify_signature(sig2, size), VB2_ERROR_SIG_SIZE,
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"verify_sig sig size");
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free(buf2);
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}
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static void test_verify_data(const struct vb2_public_key *pubk_orig,
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const struct vb21_signature *sig)
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{
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uint8_t workbuf[VB2_VERIFY_DATA_WORKBUF_BYTES]
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__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
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struct vb2_workbuf wb;
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struct vb2_public_key pubk;
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struct vb21_signature *sig2;
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uint8_t *buf2;
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uint32_t size;
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vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
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pubk = *pubk_orig;
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/* Allocate signature copy for tests */
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size = sig->c.total_size;
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buf2 = malloc(size);
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sig2 = (struct vb21_signature *)buf2;
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memcpy(buf2, sig, size);
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pubk.sig_alg = VB2_SIG_INVALID;
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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VB2_ERROR_VDATA_ALGORITHM, "vb21_verify_data() bad sig alg");
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pubk = *pubk_orig;
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memcpy(buf2, sig, size);
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pubk.hash_alg = VB2_HASH_INVALID;
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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VB2_ERROR_VDATA_DIGEST_SIZE,
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"vb21_verify_data() bad hash alg");
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pubk = *pubk_orig;
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vb2_workbuf_init(&wb, workbuf, 4);
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memcpy(buf2, sig, size);
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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VB2_ERROR_VDATA_WORKBUF_DIGEST,
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"vb21_verify_data() workbuf too small");
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vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
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memcpy(buf2, sig, size);
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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0, "vb21_verify_data() ok");
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memcpy(buf2, sig, size);
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sig2->sig_size -= 16;
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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VB2_ERROR_VDATA_SIG_SIZE, "vb21_verify_data() wrong sig size");
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memcpy(buf2, sig, size);
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TEST_EQ(vb21_verify_data(test_data, test_size - 1, sig2, &pubk, &wb),
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VB2_ERROR_VDATA_SIZE, "vb21_verify_data() wrong data size");
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memcpy(buf2, sig, size);
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sig2->hash_alg = (sig2->hash_alg == VB2_HASH_SHA1 ?
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VB2_HASH_SHA256 : VB2_HASH_SHA1);
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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VB2_ERROR_VDATA_ALGORITHM_MISMATCH,
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"vb21_verify_data() alg mismatch");
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memcpy(buf2, sig, size);
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buf2[sig2->sig_offset] ^= 0x5A;
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TEST_EQ(vb21_verify_data(test_data, test_size, sig2, &pubk, &wb),
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VB2_ERROR_RSA_PADDING, "vb21_verify_data() wrong sig");
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free(buf2);
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}
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static int test_algorithm(int key_algorithm, const char *keys_dir)
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{
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char filename[1024];
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enum vb2_signature_algorithm sig_alg =
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vb2_crypto_to_signature(key_algorithm);
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enum vb2_hash_algorithm hash_alg = vb2_crypto_to_hash(key_algorithm);
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struct vb2_private_key *prik = NULL;
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struct vb21_signature *sig2 = NULL;
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struct vb2_public_key *pubk;
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uint8_t *pubk_buf = 0;
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uint8_t *keyb_data = 0;
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uint32_t keyb_size;
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struct vb21_packed_key *key2 = NULL;
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printf("***Testing algorithm: %s\n",
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vb2_get_crypto_algorithm_name(key_algorithm));
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snprintf(filename, sizeof(filename), "%s/key_%s.pem",
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keys_dir,
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vb2_get_crypto_algorithm_file(key_algorithm));
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TEST_SUCC(vb2_private_key_read_pem(&prik, filename),
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"Read private key");
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prik->hash_alg = hash_alg;
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prik->sig_alg = sig_alg;
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vb2_private_key_set_desc(prik, "private key");
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/* Create the public key */
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TEST_SUCC(vb2_public_key_alloc(&pubk, sig_alg), "Allocate public key");
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/* Extract the keyb blob */
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TEST_SUCC(vb_keyb_from_rsa(prik->rsa_private_key,
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&keyb_data, &keyb_size),
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"Extract public key");
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/*
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* Copy the keyb blob to the public key's buffer, because that's
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* where vb2_unpack_key_data() and vb2_public_key_pack() expect
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* to find it.
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*/
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pubk_buf = vb2_public_key_packed_data(pubk);
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memcpy(pubk_buf, keyb_data, keyb_size);
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/* Fill in the internal struct pointers */
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TEST_SUCC(vb2_unpack_key_data(pubk, pubk_buf, keyb_size),
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"unpack public key blob");
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pubk->hash_alg = hash_alg;
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vb2_public_key_set_desc(pubk, "public key");
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TEST_SUCC(vb21_public_key_pack(&key2, pubk), "Pack public key");
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/* Calculate good signatures */
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TEST_SUCC(vb21_sign_data(&sig2, test_data, test_size, prik, ""),
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"Make test signature");
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test_unpack_key(key2);
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test_verify_data(pubk, sig2);
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test_verify_signature(sig2);
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free(keyb_data);
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free(key2);
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free(sig2);
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vb2_private_key_free(prik);
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vb2_public_key_free(pubk);
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return 0;
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}
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/* Test only the algorithms we use */
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const int key_algs[] = {
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VB2_ALG_RSA2048_SHA256,
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VB2_ALG_RSA4096_SHA256,
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VB2_ALG_RSA8192_SHA512,
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};
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int main(int argc, char *argv[]) {
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if (argc == 2) {
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int i;
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for (i = 0; i < ARRAY_SIZE(key_algs); i++) {
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if (test_algorithm(key_algs[i], argv[1]))
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return 1;
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}
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} else if (argc == 3 && !strcasecmp(argv[2], "--all")) {
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/* Test all the algorithms */
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int alg;
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for (alg = 0; alg < VB2_ALG_COUNT; alg++) {
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if (test_algorithm(alg, argv[1]))
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return 1;
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}
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} else {
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fprintf(stderr, "Usage: %s <keys_dir> [--all]", argv[0]);
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return -1;
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}
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return gTestSuccess ? 0 : 255;
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}
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