3 * Various utility stuff.
5 * Copyright (c) 2005 Marko Kreen
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * contrib/pgcrypto/pgp.c
40 static int def_cipher_algo = PGP_SYM_AES_128;
41 static int def_s2k_cipher_algo = -1;
42 static int def_s2k_mode = PGP_S2K_ISALTED;
43 static int def_s2k_count = -1;
44 static int def_s2k_digest_algo = PGP_DIGEST_SHA1;
45 static int def_compress_algo = PGP_COMPR_NONE;
46 static int def_compress_level = 6;
47 static int def_disable_mdc = 0;
48 static int def_use_sess_key = 0;
49 static int def_text_mode = 0;
50 static int def_unicode_mode = 0;
51 static int def_convert_crlf = 0;
68 static const struct digest_info digest_list[] = {
69 {"md5", PGP_DIGEST_MD5},
70 {"sha1", PGP_DIGEST_SHA1},
71 {"sha-1", PGP_DIGEST_SHA1},
72 {"ripemd160", PGP_DIGEST_RIPEMD160},
73 {"sha256", PGP_DIGEST_SHA256},
74 {"sha384", PGP_DIGEST_SHA384},
75 {"sha512", PGP_DIGEST_SHA512},
79 static const struct cipher_info cipher_list[] = {
80 {"3des", PGP_SYM_DES3, "3des-ecb", 192 / 8, 64 / 8},
81 {"cast5", PGP_SYM_CAST5, "cast5-ecb", 128 / 8, 64 / 8},
82 {"bf", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8},
83 {"blowfish", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8},
84 {"aes", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8},
85 {"aes128", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8},
86 {"aes192", PGP_SYM_AES_192, "aes-ecb", 192 / 8, 128 / 8},
87 {"aes256", PGP_SYM_AES_256, "aes-ecb", 256 / 8, 128 / 8},
88 {"twofish", PGP_SYM_TWOFISH, "twofish-ecb", 256 / 8, 128 / 8},
92 static const struct cipher_info *
93 get_cipher_info(int code)
95 const struct cipher_info *i;
97 for (i = cipher_list; i->name; i++)
104 pgp_get_digest_code(const char *name)
106 const struct digest_info *i;
108 for (i = digest_list; i->name; i++)
109 if (pg_strcasecmp(i->name, name) == 0)
111 return PXE_PGP_UNSUPPORTED_HASH;
115 pgp_get_cipher_code(const char *name)
117 const struct cipher_info *i;
119 for (i = cipher_list; i->name; i++)
120 if (pg_strcasecmp(i->name, name) == 0)
122 return PXE_PGP_UNSUPPORTED_CIPHER;
126 pgp_get_digest_name(int code)
128 const struct digest_info *i;
130 for (i = digest_list; i->name; i++)
137 pgp_get_cipher_name(int code)
139 const struct cipher_info *i = get_cipher_info(code);
147 pgp_get_cipher_key_size(int code)
149 const struct cipher_info *i = get_cipher_info(code);
157 pgp_get_cipher_block_size(int code)
159 const struct cipher_info *i = get_cipher_info(code);
167 pgp_load_cipher(int code, PX_Cipher **res)
170 const struct cipher_info *i = get_cipher_info(code);
173 return PXE_PGP_CORRUPT_DATA;
175 err = px_find_cipher(i->int_name, res);
179 return PXE_PGP_UNSUPPORTED_CIPHER;
183 pgp_load_digest(int code, PX_MD **res)
186 const char *name = pgp_get_digest_name(code);
189 return PXE_PGP_CORRUPT_DATA;
191 err = px_find_digest(name, res);
195 return PXE_PGP_UNSUPPORTED_HASH;
199 pgp_init(PGP_Context **ctx_p)
203 ctx = px_alloc(sizeof *ctx);
204 memset(ctx, 0, sizeof *ctx);
206 ctx->cipher_algo = def_cipher_algo;
207 ctx->s2k_cipher_algo = def_s2k_cipher_algo;
208 ctx->s2k_mode = def_s2k_mode;
209 ctx->s2k_count = def_s2k_count;
210 ctx->s2k_digest_algo = def_s2k_digest_algo;
211 ctx->compress_algo = def_compress_algo;
212 ctx->compress_level = def_compress_level;
213 ctx->disable_mdc = def_disable_mdc;
214 ctx->use_sess_key = def_use_sess_key;
215 ctx->unicode_mode = def_unicode_mode;
216 ctx->convert_crlf = def_convert_crlf;
217 ctx->text_mode = def_text_mode;
224 pgp_free(PGP_Context *ctx)
227 pgp_key_free(ctx->pub_key);
228 px_memset(ctx, 0, sizeof *ctx);
234 pgp_disable_mdc(PGP_Context *ctx, int disable)
236 ctx->disable_mdc = disable ? 1 : 0;
241 pgp_set_sess_key(PGP_Context *ctx, int use)
243 ctx->use_sess_key = use ? 1 : 0;
248 pgp_set_convert_crlf(PGP_Context *ctx, int doit)
250 ctx->convert_crlf = doit ? 1 : 0;
255 pgp_set_s2k_mode(PGP_Context *ctx, int mode)
263 case PGP_S2K_ISALTED:
264 ctx->s2k_mode = mode;
267 err = PXE_ARGUMENT_ERROR;
274 pgp_set_s2k_count(PGP_Context *ctx, int count)
276 if (ctx->s2k_mode == PGP_S2K_ISALTED && count >= 1024 && count <= 65011712)
278 ctx->s2k_count = count;
281 return PXE_ARGUMENT_ERROR;
285 pgp_set_compress_algo(PGP_Context *ctx, int algo)
292 case PGP_COMPR_BZIP2:
293 ctx->compress_algo = algo;
296 return PXE_ARGUMENT_ERROR;
300 pgp_set_compress_level(PGP_Context *ctx, int level)
302 if (level >= 0 && level <= 9)
304 ctx->compress_level = level;
307 return PXE_ARGUMENT_ERROR;
311 pgp_set_text_mode(PGP_Context *ctx, int mode)
313 ctx->text_mode = mode;
318 pgp_set_cipher_algo(PGP_Context *ctx, const char *name)
320 int code = pgp_get_cipher_code(name);
324 ctx->cipher_algo = code;
329 pgp_set_s2k_cipher_algo(PGP_Context *ctx, const char *name)
331 int code = pgp_get_cipher_code(name);
335 ctx->s2k_cipher_algo = code;
340 pgp_set_s2k_digest_algo(PGP_Context *ctx, const char *name)
342 int code = pgp_get_digest_code(name);
346 ctx->s2k_digest_algo = code;
351 pgp_get_unicode_mode(PGP_Context *ctx)
353 return ctx->unicode_mode;
357 pgp_set_unicode_mode(PGP_Context *ctx, int mode)
359 ctx->unicode_mode = mode ? 1 : 0;
364 pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int len)
366 if (key == NULL || len < 1)
367 return PXE_ARGUMENT_ERROR;
369 ctx->sym_key_len = len;