PasswordCrypt.c 7.83 KB
Newer Older
1 2 3 4
#include <efi.h>
#include <efilib.h>
#include <Library/BaseCryptLib.h>
#include <openssl/sha.h>
5
#include <openssl/md5.h>
6
#include <openssl/des.h>
7
#include "PasswordCrypt.h"
8
#include "crypt_blowfish.h"
9

10 11
#define TRAD_DES_HASH_SIZE 13 /* (64/6+1) + (12/6) */
#define BSDI_DES_HASH_SIZE 20 /* (64/6+1) + (24/6) + 4 + 1 */
12
#define BLOWFISH_HASH_SIZE 31 /* 184/6+1 */
13 14 15 16

UINT16 get_hash_size (const UINT16 method)
{
	switch (method) {
17 18
	case TRADITIONAL_DES:
		return TRAD_DES_HASH_SIZE;
19
	case EXTEND_BSDI_DES:
20
		return BSDI_DES_HASH_SIZE;
21 22 23 24 25 26 27
	case MD5_BASED:
		return MD5_DIGEST_LENGTH;
	case SHA256_BASED:
		return SHA256_DIGEST_LENGTH;
	case SHA512_BASED:
		return SHA512_DIGEST_LENGTH;
	case BLOWFISH_BASED:
28
		return BLOWFISH_HASH_SIZE;
29 30 31 32 33
	}

	return 0;
}

34 35 36 37 38 39 40 41 42 43 44 45 46 47
static EFI_STATUS trad_des_crypt (const char *key, const char *salt, UINT8 *hash)
{
	char result[TRAD_DES_HASH_SIZE + 1];
	char *ret;

	ret = DES_fcrypt(key, salt, result);
	if (ret) {
		CopyMem(hash, result, TRAD_DES_HASH_SIZE);
		return EFI_SUCCESS;
	}

	return EFI_UNSUPPORTED;
}

48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
static const char md5_salt_prefix[] = "$1$";

static EFI_STATUS md5_crypt (const char *key,  UINT32 key_len,
			     const char *salt, UINT32 salt_size,
			     UINT8 *hash)
{
	MD5_CTX ctx, alt_ctx;
	UINT8 alt_result[MD5_DIGEST_LENGTH];
	UINTN cnt;

	MD5_Init(&ctx);
	MD5_Update(&ctx, key, key_len);
	MD5_Update(&ctx, md5_salt_prefix, sizeof(md5_salt_prefix) - 1);
	MD5_Update(&ctx, salt, salt_size);

	MD5_Init(&alt_ctx);
	MD5_Update(&alt_ctx, key, key_len);
	MD5_Update(&alt_ctx, salt, salt_size);
	MD5_Update(&alt_ctx, key, key_len);
	MD5_Final(alt_result, &alt_ctx);

	for (cnt = key_len; cnt > 16; cnt -= 16)
		MD5_Update(&ctx, alt_result, 16);
	MD5_Update(&ctx, alt_result, cnt);

	*alt_result = '\0';

	for (cnt = key_len; cnt > 0; cnt >>= 1) {
		if ((cnt & 1) != 0) {
			MD5_Update(&ctx, alt_result, 1);
		} else {
			MD5_Update(&ctx, key, 1);
		}
	}
	MD5_Final(alt_result, &ctx);

	for (cnt = 0; cnt < 1000; ++cnt) {
		MD5_Init(&ctx);

		if ((cnt & 1) != 0)
			MD5_Update(&ctx, key, key_len);
		else
			MD5_Update(&ctx, alt_result, 16);

		if (cnt % 3 != 0)
			MD5_Update(&ctx, salt, salt_size);

		if (cnt % 7 != 0)
			MD5_Update(&ctx, key, key_len);

		if ((cnt & 1) != 0)
			MD5_Update(&ctx, alt_result, 16);
		else
			MD5_Update(&ctx, key, key_len);

		MD5_Final(alt_result, &ctx);
	}

	CopyMem(hash, alt_result, MD5_DIGEST_LENGTH);

	return EFI_SUCCESS;
}

111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
static EFI_STATUS sha256_crypt (const char *key,  UINT32 key_len,
				const char *salt, UINT32 salt_size,
				const UINT32 rounds, UINT8 *hash)
{
	SHA256_CTX ctx, alt_ctx;
	UINT8 alt_result[SHA256_DIGEST_SIZE];
	UINT8 tmp_result[SHA256_DIGEST_SIZE];
	UINT8 *cp, *p_bytes, *s_bytes;
	UINTN cnt;

	SHA256_Init(&ctx);
	SHA256_Update(&ctx, key, key_len);
	SHA256_Update(&ctx, salt, salt_size);

	SHA256_Init(&alt_ctx);
	SHA256_Update(&alt_ctx, key, key_len);
	SHA256_Update(&alt_ctx, salt, salt_size);
	SHA256_Update(&alt_ctx, key, key_len);
	SHA256_Final(alt_result, &alt_ctx);

	for (cnt = key_len; cnt > 32; cnt -= 32)
		SHA256_Update(&ctx, alt_result, 32);
	SHA256_Update(&ctx, alt_result, cnt);

	for (cnt = key_len; cnt > 0; cnt >>= 1) {
		if ((cnt & 1) != 0) {
			SHA256_Update(&ctx, alt_result, 32);
		} else {
			SHA256_Update(&ctx, key, key_len);
		}
	}
	SHA256_Final(alt_result, &ctx);

	SHA256_Init(&alt_ctx);
	for (cnt = 0; cnt < key_len; ++cnt)
		SHA256_Update(&alt_ctx, key, key_len);
	SHA256_Final(tmp_result, &alt_ctx);

	cp = p_bytes = AllocatePool(key_len);
	for (cnt = key_len; cnt >= 32; cnt -= 32) {
		CopyMem(cp, tmp_result, 32);
		cp += 32;
	}
	CopyMem(cp, tmp_result, cnt);

	SHA256_Init(&alt_ctx);
157
	for (cnt = 0; cnt < 16ul + alt_result[0]; ++cnt)
158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197
		SHA256_Update(&alt_ctx, salt, salt_size);
	SHA256_Final(tmp_result, &alt_ctx);

	cp = s_bytes = AllocatePool(salt_size);
	for (cnt = salt_size; cnt >= 32; cnt -= 32) {
		CopyMem(cp, tmp_result, 32);
		cp += 32;
	}
	CopyMem(cp, tmp_result, cnt);

	for (cnt = 0; cnt < rounds; ++cnt) {
		SHA256_Init(&ctx);

		if ((cnt & 1) != 0)
			SHA256_Update(&ctx, p_bytes, key_len);
		else
			SHA256_Update(&ctx, alt_result, 32);

		if (cnt % 3 != 0)
			SHA256_Update(&ctx, s_bytes, salt_size);

		if (cnt % 7 != 0)
			SHA256_Update(&ctx, p_bytes, key_len);

		if ((cnt & 1) != 0)
			SHA256_Update(&ctx, alt_result, 32);
		else
			SHA256_Update(&ctx, p_bytes, key_len);

		SHA256_Final(alt_result, &ctx);
	}

	CopyMem(hash, alt_result, SHA256_DIGEST_SIZE);

	FreePool(p_bytes);
	FreePool(s_bytes);

	return EFI_SUCCESS;
}

198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
static EFI_STATUS sha512_crypt (const char *key,  UINT32 key_len,
				const char *salt, UINT32 salt_size,
				const UINT32 rounds, UINT8 *hash)
{
	SHA512_CTX ctx, alt_ctx;
	UINT8 alt_result[SHA512_DIGEST_LENGTH];
	UINT8 tmp_result[SHA512_DIGEST_LENGTH];
	UINT8 *cp, *p_bytes, *s_bytes;
	UINTN cnt;

	SHA512_Init(&ctx);
	SHA512_Update(&ctx, key, key_len);
	SHA512_Update(&ctx, salt, salt_size);

	SHA512_Init(&alt_ctx);
	SHA512_Update(&alt_ctx, key, key_len);
	SHA512_Update(&alt_ctx, salt, salt_size);
	SHA512_Update(&alt_ctx, key, key_len);

	SHA512_Final(alt_result, &alt_ctx);

	for (cnt = key_len; cnt > 64; cnt -= 64)
		SHA512_Update(&ctx, alt_result, 64);
	SHA512_Update(&ctx, alt_result, cnt);

	for (cnt = key_len; cnt > 0; cnt >>= 1) {
		if ((cnt & 1) != 0) {
			SHA512_Update(&ctx, alt_result, 64);
		} else {
			SHA512_Update(&ctx, key, key_len);
		}
	}
	SHA512_Final(alt_result, &ctx);

	SHA512_Init(&alt_ctx);
	for (cnt = 0; cnt < key_len; ++cnt)
		SHA512_Update(&alt_ctx, key, key_len);
	SHA512_Final(tmp_result, &alt_ctx);

	cp = p_bytes = AllocatePool(key_len);
	for (cnt = key_len; cnt >= 64; cnt -= 64) {
		CopyMem(cp, tmp_result, 64);
		cp += 64;
	}
	CopyMem(cp, tmp_result, cnt);

	SHA512_Init(&alt_ctx);
245
	for (cnt = 0; cnt < 16ul + alt_result[0]; ++cnt)
246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
		SHA512_Update(&alt_ctx, salt, salt_size);
	SHA512_Final(tmp_result, &alt_ctx);

	cp = s_bytes = AllocatePool(salt_size);
	for (cnt = salt_size; cnt >= 64; cnt -= 64) {
		CopyMem(cp, tmp_result, 64);
		cp += 64;
	}
	CopyMem(cp, tmp_result, cnt);

	for (cnt = 0; cnt < rounds; ++cnt) {
		SHA512_Init(&ctx);

		if ((cnt & 1) != 0)
			SHA512_Update(&ctx, p_bytes, key_len);
		else
			SHA512_Update(&ctx, alt_result, 64);

		if (cnt % 3 != 0)
			SHA512_Update(&ctx, s_bytes, salt_size);

		if (cnt % 7 != 0)
			SHA512_Update(&ctx, p_bytes, key_len);

		if ((cnt & 1) != 0)
			SHA512_Update(&ctx, alt_result, 64);
		else
			SHA512_Update(&ctx, p_bytes, key_len);

		SHA512_Final(alt_result, &ctx);
	}

	CopyMem(hash, alt_result, SHA512_DIGEST_LENGTH);

	FreePool(p_bytes);
	FreePool(s_bytes);

	return EFI_SUCCESS;
}

286 287 288 289 290 291 292 293 294 295 296 297 298 299 300
#define BF_RESULT_SIZE (7 + 22 + 31 + 1)

static EFI_STATUS blowfish_crypt (const char *key, const char *salt, UINT8 *hash)
{
	char *retval, result[BF_RESULT_SIZE];

	retval = crypt_blowfish_rn (key, salt, result, BF_RESULT_SIZE);
	if (!retval)
		return EFI_UNSUPPORTED;

	CopyMem(hash, result + 7 + 22, BF_RESULT_SIZE);

	return EFI_SUCCESS;
}

301 302 303 304 305 306 307 308 309
EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
			   const PASSWORD_CRYPT *pw_crypt, UINT8 *hash)
{
	EFI_STATUS status;

	if (!pw_crypt)
		return EFI_INVALID_PARAMETER;

	switch (pw_crypt->method) {
310 311 312
	case TRADITIONAL_DES:
		status = trad_des_crypt (password, (char *)pw_crypt->salt, hash);
		break;
313 314 315
	case EXTEND_BSDI_DES:
		status = EFI_UNSUPPORTED;
		break;
316 317 318 319
	case MD5_BASED:
		status = md5_crypt (password, pw_length, (char *)pw_crypt->salt,
				    pw_crypt->salt_size, hash);
		break;
320 321 322 323 324 325
	case SHA256_BASED:
		status = sha256_crypt(password, pw_length, (char *)pw_crypt->salt,
				      pw_crypt->salt_size, pw_crypt->iter_count,
				      hash);
		break;
	case SHA512_BASED:
326 327 328 329
		status = sha512_crypt(password, pw_length, (char *)pw_crypt->salt,
				      pw_crypt->salt_size, pw_crypt->iter_count,
				      hash);
		break;
330
	case BLOWFISH_BASED:
331 332 333 334 335
		if (pw_crypt->salt_size != (7 + 22 + 1)) {
			status = EFI_INVALID_PARAMETER;
			break;
		}
		status = blowfish_crypt(password, (char *)pw_crypt->salt, hash);
336 337 338 339 340 341 342
		break;
	default:
		return EFI_INVALID_PARAMETER;
	}

	return status;
}