1 /* gc-gnulib.c --- Common gnulib internal crypto interface functions
2 * Copyright (C) 2002-2016 Free Software Foundation, Inc.
4 * This file is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published
6 * by the Free Software Foundation; either version 2, or (at your
7 * option) any later version.
9 * This file is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this file; if not, see <http://www.gnu.org/licenses/>.
19 /* Note: This file is only built if GC uses internal functions. */
30 #ifdef GNULIB_GC_RANDOM
32 # include <sys/types.h>
33 # include <sys/stat.h>
51 #if defined(GNULIB_GC_HMAC_MD5) || defined(GNULIB_GC_HMAC_SHA1) || defined(GNULIB_GC_HMAC_SHA256) || defined(GNULIB_GC_HMAC_SHA512)
56 #ifdef GNULIB_GC_ARCFOUR
59 #ifdef GNULIB_GC_ARCTWO
65 #ifdef GNULIB_GC_RIJNDAEL
66 # include "rijndael-api-fst.h"
69 #ifdef GNULIB_GC_RANDOM
70 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
72 # include <wincrypt.h>
73 HCRYPTPROV g_hProv = 0;
74 # ifndef PROV_INTEL_SEC
75 # define PROV_INTEL_SEC 22
77 # ifndef CRYPT_VERIFY_CONTEXT
78 # define CRYPT_VERIFY_CONTEXT 0xF0000000
86 #ifdef GNULIB_GC_RANDOM
87 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
89 CryptReleaseContext (g_hProv, 0);
91 /* There is no need to create a container for just random data, so
92 we can use CRYPT_VERIFY_CONTEXT (one call) see:
93 http://blogs.msdn.com/dangriff/archive/2003/11/19/51709.aspx */
95 /* We first try to use the Intel PIII RNG if drivers are present */
96 if (!CryptAcquireContext (&g_hProv, NULL, NULL,
97 PROV_INTEL_SEC, CRYPT_VERIFY_CONTEXT))
99 /* not a PIII or no drivers available, use default RSA CSP */
100 if (!CryptAcquireContext (&g_hProv, NULL, NULL,
101 PROV_RSA_FULL, CRYPT_VERIFY_CONTEXT))
102 return GC_RANDOM_ERROR;
113 #ifdef GNULIB_GC_RANDOM
114 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
117 CryptReleaseContext (g_hProv, 0);
126 #ifdef GNULIB_GC_RANDOM
131 randomize (int level, char *data, size_t datalen)
133 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
135 return GC_RANDOM_ERROR;
136 CryptGenRandom (g_hProv, (DWORD) datalen, data);
146 device = NAME_OF_NONCE_DEVICE;
150 device = NAME_OF_PSEUDO_RANDOM_DEVICE;
154 device = NAME_OF_RANDOM_DEVICE;
158 if (strcmp (device, "no") == 0)
159 return GC_RANDOM_ERROR;
161 fd = open (device, O_RDONLY);
163 return GC_RANDOM_ERROR;
169 tmp = read (fd, data, datalen);
173 int save_errno = errno;
176 return GC_RANDOM_ERROR;
181 while (len < datalen);
185 return GC_RANDOM_ERROR;
192 gc_nonce (char *data, size_t datalen)
194 return randomize (0, data, datalen);
198 gc_pseudo_random (char *data, size_t datalen)
200 return randomize (1, data, datalen);
204 gc_random (char *data, size_t datalen)
206 return randomize (2, data, datalen);
211 /* Memory allocation. */
214 gc_set_allocators (gc_malloc_t func_malloc,
215 gc_malloc_t secure_malloc,
216 gc_secure_check_t secure_check,
217 gc_realloc_t func_realloc, gc_free_t func_free)
224 typedef struct _gc_cipher_ctx
228 #ifdef GNULIB_GC_ARCTWO
229 arctwo_context arctwoContext;
230 char arctwoIV[ARCTWO_BLOCK_SIZE];
232 #ifdef GNULIB_GC_ARCFOUR
233 arcfour_context arcfourContext;
236 gl_des_ctx desContext;
238 #ifdef GNULIB_GC_RIJNDAEL
239 rijndaelKeyInstance aesEncKey;
240 rijndaelKeyInstance aesDecKey;
241 rijndaelCipherInstance aesContext;
246 gc_cipher_open (Gc_cipher alg, Gc_cipher_mode mode,
247 gc_cipher_handle * outhandle)
252 ctx = calloc (sizeof (*ctx), 1);
254 return GC_MALLOC_ERROR;
261 #ifdef GNULIB_GC_ARCTWO
270 rc = GC_INVALID_CIPHER;
275 #ifdef GNULIB_GC_ARCFOUR
284 rc = GC_INVALID_CIPHER;
297 rc = GC_INVALID_CIPHER;
302 #ifdef GNULIB_GC_RIJNDAEL
313 rc = GC_INVALID_CIPHER;
319 rc = GC_INVALID_CIPHER;
331 gc_cipher_setkey (gc_cipher_handle handle, size_t keylen, const char *key)
333 _gc_cipher_ctx *ctx = handle;
337 #ifdef GNULIB_GC_ARCTWO
339 arctwo_setkey (&ctx->arctwoContext, keylen, key);
343 #ifdef GNULIB_GC_ARCFOUR
346 arcfour_setkey (&ctx->arcfourContext, key, keylen);
353 return GC_INVALID_CIPHER;
354 gl_des_setkey (&ctx->desContext, key);
358 #ifdef GNULIB_GC_RIJNDAEL
365 char keyMaterial[RIJNDAEL_MAX_KEY_SIZE + 1];
367 for (i = 0; i < keylen; i++)
368 sprintf (&keyMaterial[2 * i], "%02x", key[i] & 0xFF);
370 rc = rijndaelMakeKey (&ctx->aesEncKey, RIJNDAEL_DIR_ENCRYPT,
371 keylen * 8, keyMaterial);
373 return GC_INVALID_CIPHER;
375 rc = rijndaelMakeKey (&ctx->aesDecKey, RIJNDAEL_DIR_DECRYPT,
376 keylen * 8, keyMaterial);
378 return GC_INVALID_CIPHER;
380 rc = rijndaelCipherInit (&ctx->aesContext, RIJNDAEL_MODE_ECB, NULL);
382 return GC_INVALID_CIPHER;
388 return GC_INVALID_CIPHER;
395 gc_cipher_setiv (gc_cipher_handle handle, size_t ivlen, const char *iv)
397 _gc_cipher_ctx *ctx = handle;
401 #ifdef GNULIB_GC_ARCTWO
403 if (ivlen != ARCTWO_BLOCK_SIZE)
404 return GC_INVALID_CIPHER;
405 memcpy (ctx->arctwoIV, iv, ivlen);
409 #ifdef GNULIB_GC_RIJNDAEL
416 /* Doesn't use IV. */
423 char ivMaterial[2 * RIJNDAEL_MAX_IV_SIZE + 1];
425 for (i = 0; i < ivlen; i++)
426 sprintf (&ivMaterial[2 * i], "%02x", iv[i] & 0xFF);
428 rc = rijndaelCipherInit (&ctx->aesContext, RIJNDAEL_MODE_CBC,
431 return GC_INVALID_CIPHER;
436 return GC_INVALID_CIPHER;
442 return GC_INVALID_CIPHER;
449 gc_cipher_encrypt_inline (gc_cipher_handle handle, size_t len, char *data)
451 _gc_cipher_ctx *ctx = handle;
455 #ifdef GNULIB_GC_ARCTWO
460 arctwo_encrypt (&ctx->arctwoContext, data, data, len);
464 for (; len >= ARCTWO_BLOCK_SIZE; len -= ARCTWO_BLOCK_SIZE,
465 data += ARCTWO_BLOCK_SIZE)
468 for (i = 0; i < ARCTWO_BLOCK_SIZE; i++)
469 data[i] ^= ctx->arctwoIV[i];
470 arctwo_encrypt (&ctx->arctwoContext, data, data,
472 memcpy (ctx->arctwoIV, data, ARCTWO_BLOCK_SIZE);
477 return GC_INVALID_CIPHER;
482 #ifdef GNULIB_GC_ARCFOUR
485 arcfour_stream (&ctx->arcfourContext, data, data, len);
491 for (; len >= 8; len -= 8, data += 8)
492 gl_des_ecb_encrypt (&ctx->desContext, data, data);
496 #ifdef GNULIB_GC_RIJNDAEL
503 nblocks = rijndaelBlockEncrypt (&ctx->aesContext, &ctx->aesEncKey,
504 data, 8 * len, data);
506 return GC_INVALID_CIPHER;
512 return GC_INVALID_CIPHER;
519 gc_cipher_decrypt_inline (gc_cipher_handle handle, size_t len, char *data)
521 _gc_cipher_ctx *ctx = handle;
525 #ifdef GNULIB_GC_ARCTWO
530 arctwo_decrypt (&ctx->arctwoContext, data, data, len);
534 for (; len >= ARCTWO_BLOCK_SIZE; len -= ARCTWO_BLOCK_SIZE,
535 data += ARCTWO_BLOCK_SIZE)
537 char tmpIV[ARCTWO_BLOCK_SIZE];
539 memcpy (tmpIV, data, ARCTWO_BLOCK_SIZE);
540 arctwo_decrypt (&ctx->arctwoContext, data, data,
542 for (i = 0; i < ARCTWO_BLOCK_SIZE; i++)
543 data[i] ^= ctx->arctwoIV[i];
544 memcpy (ctx->arctwoIV, tmpIV, ARCTWO_BLOCK_SIZE);
549 return GC_INVALID_CIPHER;
554 #ifdef GNULIB_GC_ARCFOUR
557 arcfour_stream (&ctx->arcfourContext, data, data, len);
563 for (; len >= 8; len -= 8, data += 8)
564 gl_des_ecb_decrypt (&ctx->desContext, data, data);
568 #ifdef GNULIB_GC_RIJNDAEL
575 nblocks = rijndaelBlockDecrypt (&ctx->aesContext, &ctx->aesDecKey,
576 data, 8 * len, data);
578 return GC_INVALID_CIPHER;
584 return GC_INVALID_CIPHER;
591 gc_cipher_close (gc_cipher_handle handle)
593 _gc_cipher_ctx *ctx = handle;
602 #define MAX_DIGEST_SIZE 20
604 typedef struct _gc_hash_ctx
608 char hash[MAX_DIGEST_SIZE];
610 struct md2_ctx md2Context;
613 struct md4_ctx md4Context;
616 struct md5_ctx md5Context;
618 #ifdef GNULIB_GC_SHA1
619 struct sha1_ctx sha1Context;
624 gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
630 return GC_INVALID_HASH;
632 ctx = calloc (sizeof (*ctx), 1);
634 return GC_MALLOC_ERROR;
643 md2_init_ctx (&ctx->md2Context);
649 md4_init_ctx (&ctx->md4Context);
655 md5_init_ctx (&ctx->md5Context);
659 #ifdef GNULIB_GC_SHA1
661 sha1_init_ctx (&ctx->sha1Context);
666 rc = GC_INVALID_HASH;
679 gc_hash_clone (gc_hash_handle handle, gc_hash_handle * outhandle)
681 _gc_hash_ctx *in = handle;
684 *outhandle = out = calloc (sizeof (*out), 1);
686 return GC_MALLOC_ERROR;
688 memcpy (out, in, sizeof (*out));
694 gc_hash_digest_length (Gc_hash hash)
701 len = GC_MD2_DIGEST_SIZE;
705 len = GC_MD4_DIGEST_SIZE;
709 len = GC_MD5_DIGEST_SIZE;
713 len = GC_RMD160_DIGEST_SIZE;
717 len = GC_SHA1_DIGEST_SIZE;
728 gc_hash_write (gc_hash_handle handle, size_t len, const char *data)
730 _gc_hash_ctx *ctx = handle;
736 md2_process_bytes (data, len, &ctx->md2Context);
742 md4_process_bytes (data, len, &ctx->md4Context);
748 md5_process_bytes (data, len, &ctx->md5Context);
752 #ifdef GNULIB_GC_SHA1
754 sha1_process_bytes (data, len, &ctx->sha1Context);
764 gc_hash_read (gc_hash_handle handle)
766 _gc_hash_ctx *ctx = handle;
767 const char *ret = NULL;
773 md2_finish_ctx (&ctx->md2Context, ctx->hash);
780 md4_finish_ctx (&ctx->md4Context, ctx->hash);
787 md5_finish_ctx (&ctx->md5Context, ctx->hash);
792 #ifdef GNULIB_GC_SHA1
794 sha1_finish_ctx (&ctx->sha1Context, ctx->hash);
807 gc_hash_close (gc_hash_handle handle)
809 _gc_hash_ctx *ctx = handle;
815 gc_hash_buffer (Gc_hash hash, const void *in, size_t inlen, char *resbuf)
821 md2_buffer (in, inlen, resbuf);
827 md4_buffer (in, inlen, resbuf);
833 md5_buffer (in, inlen, resbuf);
837 #ifdef GNULIB_GC_SHA1
839 sha1_buffer (in, inlen, resbuf);
844 return GC_INVALID_HASH;
852 gc_md2 (const void *in, size_t inlen, void *resbuf)
854 md2_buffer (in, inlen, resbuf);
861 gc_md4 (const void *in, size_t inlen, void *resbuf)
863 md4_buffer (in, inlen, resbuf);
870 gc_md5 (const void *in, size_t inlen, void *resbuf)
872 md5_buffer (in, inlen, resbuf);
877 #ifdef GNULIB_GC_SHA1
879 gc_sha1 (const void *in, size_t inlen, void *resbuf)
881 sha1_buffer (in, inlen, resbuf);
886 #ifdef GNULIB_GC_HMAC_MD5
888 gc_hmac_md5 (const void *key, size_t keylen,
889 const void *in, size_t inlen, char *resbuf)
891 hmac_md5 (key, keylen, in, inlen, resbuf);
896 #ifdef GNULIB_GC_HMAC_SHA1
898 gc_hmac_sha1 (const void *key, size_t keylen,
899 const void *in, size_t inlen, char *resbuf)
901 hmac_sha1 (key, keylen, in, inlen, resbuf);
906 #ifdef GNULIB_GC_HMAC_SHA256
908 gc_hmac_sha256 (const void *key, size_t keylen,
909 const void *in, size_t inlen, char *resbuf)
911 hmac_sha256 (key, keylen, in, inlen, resbuf);
916 #ifdef GNULIB_GC_HMAC_SHA512
918 gc_hmac_sha512 (const void *key, size_t keylen,
919 const void *in, size_t inlen, char *resbuf)
921 hmac_sha512 (key, keylen, in, inlen, resbuf);