+++ /dev/null
-/*
- * Copyright (c) 2007-2008,2010 Apple Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#include <stdlib.h>
-#include <string.h> // memcpy
-
-#include <CommonCrypto/CommonDigest.h>
-#include <CommonCrypto/CommonDigestSPI.h>
-
-#include <corecrypto/ccn.h>
-
-#include "p12pbegen.h"
-
-static uint8_t *concatenate_to_blocksize(const uint8_t *data, size_t data_length,
- size_t blocksize, size_t *blocklength)
-{
- size_t block_length = blocksize * ((data_length + blocksize - 1) / blocksize);
- uint8_t *block_ptr, *block;
- block_ptr = block = malloc(block_length);
- if (!block_ptr)
- return NULL;
- while (block_ptr < block + block_length) {
- size_t bytes_to_move = block + block_length - block_ptr;
- memcpy(block_ptr, data, bytes_to_move > data_length ? data_length : bytes_to_move);
- block_ptr += data_length;
- }
- *blocklength = block_length;
- return block;
-}
-
-int p12_pbe_gen(CFStringRef passphrase, uint8_t *salt_ptr, size_t salt_length,
- unsigned iter_count, P12_PBE_ID pbe_id, uint8_t *data, size_t length)
-{
- unsigned int hash_blocksize = CC_SHA1_BLOCK_BYTES;
- unsigned int hash_outputsize = CC_SHA1_DIGEST_LENGTH;
-
- if (!passphrase)
- return -1;
-
- /* generate diversifier block */
- unsigned char diversifier[hash_blocksize];
- memset(diversifier, pbe_id, sizeof(diversifier));
-
- /* convert passphrase to BE UTF16 and append double null */
- CFDataRef passphrase_be_unicode = CFStringCreateExternalRepresentation(kCFAllocatorDefault, passphrase, kCFStringEncodingUTF16BE, '\0');
- if (!passphrase_be_unicode)
- return -1;
- uint8_t null_termination[2] = { 0, 0 };
- CFMutableDataRef passphrase_be_unicode_null_term = CFDataCreateMutableCopy(NULL, 0, passphrase_be_unicode);
- CFRelease(passphrase_be_unicode);
- if (!passphrase_be_unicode_null_term)
- return -1;
- CFDataAppendBytes(passphrase_be_unicode_null_term, null_termination, sizeof(null_termination));
-
- /* generate passphrase block */
- uint8_t *passphrase_data = NULL;
- size_t passphrase_data_len = 0;
- size_t passphrase_length = CFDataGetLength(passphrase_be_unicode_null_term);
- const unsigned char *passphrase_ptr = CFDataGetBytePtr(passphrase_be_unicode_null_term);
- passphrase_data = concatenate_to_blocksize(passphrase_ptr, passphrase_length, hash_blocksize, &passphrase_data_len);
- CFRelease(passphrase_be_unicode_null_term);
- if (!passphrase_data)
- return -1;
-
- /* generate salt block */
- uint8_t *salt_data = NULL;
- size_t salt_data_len = 0;
- if (salt_length)
- salt_data = concatenate_to_blocksize(salt_ptr, salt_length, hash_blocksize, &salt_data_len);
- if (!salt_data){
- free(passphrase_data);
- return -1;
- }
- /* generate S||P block */
- size_t I_length = salt_data_len + passphrase_data_len;
- uint8_t *I_data = malloc(I_length);
- if (!I_data){
- free(salt_data);
- free(passphrase_data);
- return -1;
- }
- memcpy(I_data + 0, salt_data, salt_data_len);
- memcpy(I_data + salt_data_len, passphrase_data, passphrase_data_len);
- free(salt_data);
- free(passphrase_data);
-
- /* round up output buffer to multiple of hash block size and allocate */
- size_t hash_output_blocks = (length + hash_outputsize - 1) / hash_outputsize;
- size_t temp_buf_size = hash_output_blocks * hash_outputsize;
- uint8_t *temp_buf = malloc(temp_buf_size);
- uint8_t *cursor = temp_buf;
- if (!temp_buf){
- free(I_data);
- return -1;
- }
- /* 64 bits cast(s): worst case here is we dont hash all the data and incorectly derive the wrong key,
- when the passphrase + salt are over 2^32 bytes long */
- /* loop over output in hash_output_size increments */
- while (cursor < temp_buf + temp_buf_size) {
- CC_SHA1_CTX ctx;
- CC_SHA1_Init(&ctx);
- CC_SHA1_Update(&ctx, diversifier, (CC_LONG)sizeof(diversifier));
- assert(I_length<=UINT32_MAX); /* debug check. Correct as long as CC_LONG is uint32_t */
- CC_SHA1_Update(&ctx, I_data, (CC_LONG)I_length);
- CC_SHA1_Final(cursor, &ctx);
-
- /* run block through SHA-1 for iteration count */
- unsigned int i;
- for (i = 1; /*first round done above*/ i < iter_count; i++)
- CCDigest(kCCDigestSHA1, cursor, hash_outputsize, cursor);
-
- /*
- * b) Concatenate copies of A[i] to create a string B of
- * length v bits (the final copy of A[i]i may be truncated
- * to create B).
- */
- size_t A_i_len = 0;
- uint8_t *A_i = concatenate_to_blocksize(cursor,
- hash_outputsize, hash_blocksize, &A_i_len);
- if (!A_i){
- free(I_data);
- free(temp_buf);
- return -1;
- }
- /*
- * c) Treating I as a concatenation I[0], I[1], ...,
- * I[k-1] of v-bit blocks, where k = ceil(s/v) + ceil(p/v),
- * modify I by setting I[j]=(I[j]+B+1) mod (2 ** v)
- * for each j.
- */
-
- /* tmp1 = B+1 */
-
- const cc_size tmp_n = ccn_nof_size(A_i_len + 1) > ccn_nof_size(hash_blocksize) ? ccn_nof_size(A_i_len + 1) : ccn_nof_size(hash_blocksize);
- cc_unit tmp1[tmp_n];
- ccn_read_uint(tmp_n, tmp1, A_i_len, A_i);
- ccn_add1(tmp_n, tmp1, tmp1, 1);
-
- free(A_i);
-
- cc_unit tmp2[tmp_n];
- unsigned int j;
- for (j = 0; j < I_length; j+=hash_blocksize) {
- /* tempg = I[j]; */
- ccn_read_uint(tmp_n, tmp2, hash_blocksize, I_data + j);
- /* tempg += tmp1 */
- ccn_add(tmp_n, tmp2, tmp2, tmp1);
-
- /* I[j] = tempg mod 2**v
- Just clear all the high bits above 2**v
- In practice at most it rolled over by 1 bit, since all we did was add so
- we should only clear one bit at most.
- */
- size_t bitSize;
- const size_t hash_blocksize_bits = hash_blocksize * 8;
- while ((bitSize = ccn_bitlen(tmp_n, tmp2)) > hash_blocksize_bits)
- {
- ccn_set_bit(tmp2, bitSize - 1, 0);
- }
-
- ccn_write_uint_padded(tmp_n, tmp2, hash_blocksize, I_data + j);
- }
-
- cursor += hash_outputsize;
- }
-
- /*
- * 7. Concatenate A[1], A[2], ..., A[c] together to form a
- * pseudo-random bit string, A.
- *
- * 8. Use the first n bits of A as the output of this entire
- * process.
- */
- memmove(data, temp_buf, length);
- free(temp_buf);
- free(I_data);
- return 0;
-}
-
-#if 0
-bool test()
-{
- //smeg => 0073006D006500670000
- CFStringRef password = CFSTR("smeg");
- //Salt (length 8):
- unsigned char salt_bytes[] = { 0x0A, 0x58, 0xCF, 0x64, 0x53, 0x0D, 0x82, 0x3F };
- CFDataRef salt = CFDataCreate(NULL, salt_bytes, sizeof(salt_bytes));
- // ID 1, ITER 1
- // Output KEY (length 24)
- unsigned char correct_result[] = { 0x8A, 0xAA, 0xE6, 0x29, 0x7B, 0x6C, 0xB0, 0x46, 0x42, 0xAB, 0x5B, 0x07, 0x78, 0x51, 0x28, 0x4E, 0xB7, 0x12, 0x8F, 0x1A, 0x2A, 0x7F, 0xBC, 0xA3 };
- unsigned char result[24];
- p12PbeGen(password, salt, 1, PBE_ID_Key, result, sizeof(result));
- if (memcmp(correct_result, result, sizeof(correct_result))) {
- printf("test failure\n");
- return false;
- }
- return true;
-}
-
-bool test2()
-{
- CFStringRef password = CFSTR("queeg");
- unsigned char salt_bytes[] = { 0x05,0xDE,0xC9,0x59,0xAC,0xFF,0x72,0xF7 };
- CFDataRef salt = CFDataCreate(NULL, salt_bytes, sizeof(salt_bytes));
- unsigned char correct_result[] = { 0xED,0x20,0x34,0xE3,0x63,0x28,0x83,0x0F,0xF0,0x9D,0xF1,0xE1,0xA0,0x7D,0xD3,0x57,0x18,0x5D,0xAC,0x0D,0x4F,0x9E,0xB3,0xD4 };
- unsigned char result[24];
- p12PbeGen(password, salt, 1000, PBE_ID_Key, result, sizeof(result));
- if (memcmp(correct_result, result, sizeof(correct_result))) {
- printf("test failure\n");
- return false;
- }
- return true;
-}
-
-int main(int argc, char *argv[])
-{
- test();
- test2();
-}
-
-#endif
-
-/* http://www.drh-consultancy.demon.co.uk/test.txt
-
- Test Vectors set 1.
-
- Password: smeg
-
-KEYGEN DEBUG
-ID 1, ITER 1
-Password (length 10):
-0073006D006500670000
-Salt (length 8):
-0A58CF64530D823F
-ID 1, ITER 1
-Output KEY (length 24)
-8AAAE6297B6CB04642AB5B077851284EB7128F1A2A7FBCA3
-
-KEYGEN DEBUG
-ID 2, ITER 1
-Password (length 10):
-0073006D006500670000
-Salt (length 8):
-0A58CF64530D823F
-ID 2, ITER 1
-Output KEY (length 8)
-79993DFE048D3B76
-
-KEYGEN DEBUG
-ID 1, ITER 1
-Password (length 10):
-0073006D006500670000
-Salt (length 8):
-642B99AB44FB4B1F
-ID 1, ITER 1
-Output KEY (length 24)
-F3A95FEC48D7711E985CFE67908C5AB79FA3D7C5CAA5D966
-
-KEYGEN DEBUG
-ID 2, ITER 1
-Password (length 10):
-0073006D006500670000
-Salt (length 8):
-642B99AB44FB4B1F
-ID 2, ITER 1
-Output KEY (length 8)
-C0A38D64A79BEA1D
-
-KEYGEN DEBUG
-ID 3, ITER 1
-Password (length 10):
-0073006D006500670000
-Salt (length 8):
-3D83C0E4546AC140
-ID 3, ITER 1
-Output KEY (length 20)
-8D967D88F6CAA9D714800AB3D48051D63F73A312
-
-Test Vectors set 2.
-Password: queeg
-
-KEYGEN DEBUG
-ID 1, ITER 1000
-Password (length 12):
-007100750065006500670000
-Salt (length 8):
-05DEC959ACFF72F7
-ID 1, ITER 1000
-Output KEY (length 24)
-ED2034E36328830FF09DF1E1A07DD357185DAC0D4F9EB3D4
-
-KEYGEN DEBUG
-ID 2, ITER 1000
-Password (length 12):
-007100750065006500670000
-Salt (length 8):
-05DEC959ACFF72F7
-ID 2, ITER 1000
-Output KEY (length 8)
-11DEDAD7758D4860
-
-KEYGEN DEBUG
-ID 1, ITER 1000
-Password (length 12):
-007100750065006500670000
-Salt (length 8):
-1682C0FC5B3F7EC5
-ID 1, ITER 1000
-Output KEY (length 24)
-483DD6E919D7DE2E8E648BA8F862F3FBFBDC2BCB2C02957F
-
-KEYGEN DEBUG
-ID 2, ITER 1000
-Password (length 12):
-007100750065006500670000
-Salt (length 8):
-1682C0FC5B3F7EC5
-ID 2, ITER 1000
-Output KEY (length 8)
-9D461D1B00355C50
-
-KEYGEN DEBUG
-ID 3, ITER 1000
-Password (length 12):
-007100750065006500670000
-Salt (length 8):
-263216FCC2FAB31C
-ID 3, ITER 1000
-Output KEY (length 20)
-5EC4C7A80DF652294C3925B6489A7AB857C83476
-*/
-
projects / apple / security.git / blobdiff