1 /* gc-libgcrypt.c --- Crypto wrappers around Libgcrypt for GC.
2 * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Simon Josefsson
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, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 /* Note: This file is only built if GC uses Libgcrypt. */
31 /* Get libgcrypt API. */
46 err = gcry_control (GCRYCTL_ANY_INITIALIZATION_P);
47 if (err == GPG_ERR_NO_ERROR)
49 if (gcry_control (GCRYCTL_DISABLE_SECMEM, NULL, 0))
52 if (gcry_check_version (GCRYPT_VERSION) == NULL)
55 err = gcry_control (GCRYCTL_INITIALIZATION_FINISHED, NULL, 0);
56 if (err != GPG_ERR_NO_ERROR)
69 #ifdef GNULIB_GC_RANDOM
74 gc_nonce (char *data, size_t datalen)
76 gcry_create_nonce ((unsigned char *) data, datalen);
81 gc_pseudo_random (char *data, size_t datalen)
83 gcry_randomize ((unsigned char *) data, datalen, GCRY_STRONG_RANDOM);
88 gc_random (char *data, size_t datalen)
90 gcry_randomize ((unsigned char *) data, datalen, GCRY_VERY_STRONG_RANDOM);
96 /* Memory allocation. */
99 gc_set_allocators (gc_malloc_t func_malloc,
100 gc_malloc_t secure_malloc,
101 gc_secure_check_t secure_check,
102 gc_realloc_t func_realloc, gc_free_t func_free)
104 gcry_set_allocation_handler (func_malloc, secure_malloc, secure_check,
105 func_realloc, func_free);
111 gc_cipher_open (Gc_cipher alg, Gc_cipher_mode mode,
112 gc_cipher_handle * outhandle)
114 int gcryalg, gcrymode;
120 gcryalg = GCRY_CIPHER_RIJNDAEL;
124 gcryalg = GCRY_CIPHER_RIJNDAEL;
128 gcryalg = GCRY_CIPHER_RIJNDAEL256;
132 gcryalg = GCRY_CIPHER_3DES;
136 gcryalg = GCRY_CIPHER_DES;
141 gcryalg = GCRY_CIPHER_ARCFOUR;
145 gcryalg = GCRY_CIPHER_RFC2268_40;
150 gcryalg = GCRY_CIPHER_CAMELLIA128;
154 gcryalg = GCRY_CIPHER_CAMELLIA256;
159 return GC_INVALID_CIPHER;
165 gcrymode = GCRY_CIPHER_MODE_ECB;
169 gcrymode = GCRY_CIPHER_MODE_CBC;
173 gcrymode = GCRY_CIPHER_MODE_STREAM;
177 return GC_INVALID_CIPHER;
180 err = gcry_cipher_open ((gcry_cipher_hd_t *) outhandle,
181 gcryalg, gcrymode, 0);
182 if (gcry_err_code (err))
183 return GC_INVALID_CIPHER;
189 gc_cipher_setkey (gc_cipher_handle handle, size_t keylen, const char *key)
193 err = gcry_cipher_setkey ((gcry_cipher_hd_t) handle, key, keylen);
194 if (gcry_err_code (err))
195 return GC_INVALID_CIPHER;
201 gc_cipher_setiv (gc_cipher_handle handle, size_t ivlen, const char *iv)
205 err = gcry_cipher_setiv ((gcry_cipher_hd_t) handle, iv, ivlen);
206 if (gcry_err_code (err))
207 return GC_INVALID_CIPHER;
213 gc_cipher_encrypt_inline (gc_cipher_handle handle, size_t len, char *data)
215 if (gcry_cipher_encrypt ((gcry_cipher_hd_t) handle,
216 data, len, NULL, len) != 0)
217 return GC_INVALID_CIPHER;
223 gc_cipher_decrypt_inline (gc_cipher_handle handle, size_t len, char *data)
225 if (gcry_cipher_decrypt ((gcry_cipher_hd_t) handle,
226 data, len, NULL, len) != 0)
227 return GC_INVALID_CIPHER;
233 gc_cipher_close (gc_cipher_handle handle)
235 gcry_cipher_close (handle);
242 typedef struct _gc_hash_ctx {
247 char hash[GC_MD2_DIGEST_SIZE];
248 struct md2_ctx md2Context;
253 gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
256 int gcryalg = 0, gcrymode = 0;
260 ctx = calloc (sizeof (*ctx), 1);
262 return GC_MALLOC_ERROR;
270 gcryalg = GCRY_MD_NONE;
274 gcryalg = GCRY_MD_MD4;
278 gcryalg = GCRY_MD_MD5;
282 gcryalg = GCRY_MD_SHA1;
286 gcryalg = GCRY_MD_SHA256;
290 gcryalg = GCRY_MD_SHA384;
294 gcryalg = GCRY_MD_SHA512;
298 gcryalg = GCRY_MD_SHA224;
302 gcryalg = GCRY_MD_RMD160;
306 rc = GC_INVALID_HASH;
316 gcrymode = GCRY_MD_FLAG_HMAC;
320 rc = GC_INVALID_HASH;
323 if (rc == GC_OK && gcryalg != GCRY_MD_NONE)
325 err = gcry_md_open (&ctx->gch, gcryalg, gcrymode);
326 if (gcry_err_code (err))
327 rc = GC_INVALID_HASH;
339 gc_hash_clone (gc_hash_handle handle, gc_hash_handle * outhandle)
341 _gc_hash_ctx *in = handle;
345 *outhandle = out = calloc (sizeof (*out), 1);
347 return GC_MALLOC_ERROR;
349 memcpy (out, in, sizeof (*out));
351 err = gcry_md_copy (&out->gch, in->gch);
355 return GC_INVALID_HASH;
362 gc_hash_digest_length (Gc_hash hash)
369 len = GC_MD2_DIGEST_SIZE;
373 len = GC_MD4_DIGEST_SIZE;
377 len = GC_MD5_DIGEST_SIZE;
381 len = GC_RMD160_DIGEST_SIZE;
385 len = GC_SHA1_DIGEST_SIZE;
389 len = GC_SHA256_DIGEST_SIZE;
393 len = GC_SHA384_DIGEST_SIZE;
397 len = GC_SHA512_DIGEST_SIZE;
401 len = GC_SHA224_DIGEST_SIZE;
412 gc_hash_hmac_setkey (gc_hash_handle handle, size_t len, const char *key)
414 _gc_hash_ctx *ctx = handle;
416 if (ctx->alg != GC_MD2)
418 gcry_md_setkey (ctx->gch, key, len);
422 gc_hash_write (gc_hash_handle handle, size_t len, const char *data)
424 _gc_hash_ctx *ctx = handle;
427 if (ctx->alg == GC_MD2)
428 md2_process_bytes (data, len, &ctx->md2Context);
431 gcry_md_write (ctx->gch, data, len);
435 gc_hash_read (gc_hash_handle handle)
437 _gc_hash_ctx *ctx = handle;
441 if (ctx->alg == GC_MD2)
443 md2_finish_ctx (&ctx->md2Context, ctx->hash);
449 gcry_md_final (ctx->gch);
450 digest = gcry_md_read (ctx->gch, 0);
457 gc_hash_close (gc_hash_handle handle)
459 _gc_hash_ctx *ctx = handle;
462 if (ctx->alg != GC_MD2)
464 gcry_md_close (ctx->gch);
470 gc_hash_buffer (Gc_hash hash, const void *in, size_t inlen, char *resbuf)
478 md2_buffer (in, inlen, resbuf);
485 gcryalg = GCRY_MD_MD4;
491 gcryalg = GCRY_MD_MD5;
495 #ifdef GNULIB_GC_SHA1
497 gcryalg = GCRY_MD_SHA1;
501 #ifdef GNULIB_GC_SHA256
503 gcryalg = GCRY_MD_SHA256;
507 #ifdef GNULIB_GC_SHA384
509 gcryalg = GCRY_MD_SHA384;
513 #ifdef GNULIB_GC_SHA512
515 gcryalg = GCRY_MD_SHA512;
519 #ifdef GNULIB_GC_SHA224
521 gcryalg = GCRY_MD_SHA224;
525 #ifdef GNULIB_GC_RMD160
527 gcryalg = GCRY_MD_RMD160;
532 return GC_INVALID_HASH;
535 gcry_md_hash_buffer (gcryalg, resbuf, in, inlen);
540 /* One-call interface. */
544 gc_md2 (const void *in, size_t inlen, void *resbuf)
546 md2_buffer (in, inlen, resbuf);
553 gc_md4 (const void *in, size_t inlen, void *resbuf)
555 size_t outlen = gcry_md_get_algo_dlen (GCRY_MD_MD4);
560 assert (outlen == GC_MD4_DIGEST_SIZE);
562 err = gcry_md_open (&hd, GCRY_MD_MD4, 0);
563 if (err != GPG_ERR_NO_ERROR)
564 return GC_INVALID_HASH;
566 gcry_md_write (hd, in, inlen);
568 p = gcry_md_read (hd, GCRY_MD_MD4);
572 return GC_INVALID_HASH;
575 memcpy (resbuf, p, outlen);
585 gc_md5 (const void *in, size_t inlen, void *resbuf)
587 size_t outlen = gcry_md_get_algo_dlen (GCRY_MD_MD5);
592 assert (outlen == GC_MD5_DIGEST_SIZE);
594 err = gcry_md_open (&hd, GCRY_MD_MD5, 0);
595 if (err != GPG_ERR_NO_ERROR)
596 return GC_INVALID_HASH;
598 gcry_md_write (hd, in, inlen);
600 p = gcry_md_read (hd, GCRY_MD_MD5);
604 return GC_INVALID_HASH;
607 memcpy (resbuf, p, outlen);
615 #ifdef GNULIB_GC_SHA1
617 gc_sha1 (const void *in, size_t inlen, void *resbuf)
619 size_t outlen = gcry_md_get_algo_dlen (GCRY_MD_SHA1);
624 assert (outlen == GC_SHA1_DIGEST_SIZE);
626 err = gcry_md_open (&hd, GCRY_MD_SHA1, 0);
627 if (err != GPG_ERR_NO_ERROR)
628 return GC_INVALID_HASH;
630 gcry_md_write (hd, in, inlen);
632 p = gcry_md_read (hd, GCRY_MD_SHA1);
636 return GC_INVALID_HASH;
639 memcpy (resbuf, p, outlen);
647 #ifdef GNULIB_GC_HMAC_MD5
649 gc_hmac_md5 (const void *key, size_t keylen,
650 const void *in, size_t inlen, char *resbuf)
652 size_t hlen = gcry_md_get_algo_dlen (GCRY_MD_MD5);
659 err = gcry_md_open (&mdh, GCRY_MD_MD5, GCRY_MD_FLAG_HMAC);
660 if (err != GPG_ERR_NO_ERROR)
661 return GC_INVALID_HASH;
663 err = gcry_md_setkey (mdh, key, keylen);
664 if (err != GPG_ERR_NO_ERROR)
667 return GC_INVALID_HASH;
670 gcry_md_write (mdh, in, inlen);
672 hash = gcry_md_read (mdh, GCRY_MD_MD5);
676 return GC_INVALID_HASH;
679 memcpy (resbuf, hash, hlen);
687 #ifdef GNULIB_GC_HMAC_SHA1
689 gc_hmac_sha1 (const void *key, size_t keylen,
690 const void *in, size_t inlen, char *resbuf)
692 size_t hlen = gcry_md_get_algo_dlen (GCRY_MD_SHA1);
697 assert (hlen == GC_SHA1_DIGEST_SIZE);
699 err = gcry_md_open (&mdh, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC);
700 if (err != GPG_ERR_NO_ERROR)
701 return GC_INVALID_HASH;
703 err = gcry_md_setkey (mdh, key, keylen);
704 if (err != GPG_ERR_NO_ERROR)
707 return GC_INVALID_HASH;
710 gcry_md_write (mdh, in, inlen);
712 hash = gcry_md_read (mdh, GCRY_MD_SHA1);
716 return GC_INVALID_HASH;
719 memcpy (resbuf, hash, hlen);