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00001 /* 00002 * pgp.h 00003 * OpenPGP implementation. 00004 * 00005 * Copyright (c) 2005 Marko Kreen 00006 * All rights reserved. 00007 * 00008 * Redistribution and use in source and binary forms, with or without 00009 * modification, are permitted provided that the following conditions 00010 * are met: 00011 * 1. Redistributions of source code must retain the above copyright 00012 * notice, this list of conditions and the following disclaimer. 00013 * 2. Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in the 00015 * documentation and/or other materials provided with the distribution. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * contrib/pgcrypto/pgp.h 00030 */ 00031 00032 enum PGP_S2K_TYPE 00033 { 00034 PGP_S2K_SIMPLE = 0, 00035 PGP_S2K_SALTED = 1, 00036 PGP_S2K_ISALTED = 3 00037 }; 00038 00039 enum PGP_PKT_TYPE 00040 { 00041 PGP_PKT_RESERVED = 0, 00042 PGP_PKT_PUBENCRYPTED_SESSKEY = 1, 00043 PGP_PKT_SIGNATURE = 2, 00044 PGP_PKT_SYMENCRYPTED_SESSKEY = 3, 00045 PGP_PKT_SECRET_KEY = 5, 00046 PGP_PKT_PUBLIC_KEY = 6, 00047 PGP_PKT_SECRET_SUBKEY = 7, 00048 PGP_PKT_COMPRESSED_DATA = 8, 00049 PGP_PKT_SYMENCRYPTED_DATA = 9, 00050 PGP_PKT_MARKER = 10, 00051 PGP_PKT_LITERAL_DATA = 11, 00052 PGP_PKT_TRUST = 12, 00053 PGP_PKT_USER_ID = 13, 00054 PGP_PKT_PUBLIC_SUBKEY = 14, 00055 PGP_PKT_USER_ATTR = 17, 00056 PGP_PKT_SYMENCRYPTED_DATA_MDC = 18, 00057 PGP_PKT_MDC = 19, 00058 PGP_PKT_PRIV_61 = 61 /* occurs in gpg secring */ 00059 }; 00060 00061 enum PGP_PUB_ALGO_TYPE 00062 { 00063 PGP_PUB_RSA_ENCRYPT_SIGN = 1, 00064 PGP_PUB_RSA_ENCRYPT = 2, 00065 PGP_PUB_RSA_SIGN = 3, 00066 PGP_PUB_ELG_ENCRYPT = 16, 00067 PGP_PUB_DSA_SIGN = 17 00068 }; 00069 00070 enum PGP_SYMENC_TYPE 00071 { 00072 PGP_SYM_PLAIN = 0, /* ?? */ 00073 PGP_SYM_IDEA = 1, /* obsolete, PGP 2.6 compat */ 00074 PGP_SYM_DES3 = 2, /* must */ 00075 PGP_SYM_CAST5 = 3, /* should */ 00076 PGP_SYM_BLOWFISH = 4, 00077 PGP_SYM_SAFER_SK128 = 5, /* obsolete */ 00078 PGP_SYM_DES_SK = 6, /* obsolete */ 00079 PGP_SYM_AES_128 = 7, /* should */ 00080 PGP_SYM_AES_192 = 8, 00081 PGP_SYM_AES_256 = 9, 00082 PGP_SYM_TWOFISH = 10 00083 }; 00084 00085 enum PGP_COMPR_TYPE 00086 { 00087 PGP_COMPR_NONE = 0, /* must */ 00088 PGP_COMPR_ZIP = 1, /* should */ 00089 PGP_COMPR_ZLIB = 2, 00090 PGP_COMPR_BZIP2 = 3 00091 }; 00092 00093 enum PGP_DIGEST_TYPE 00094 { 00095 PGP_DIGEST_MD5 = 1, /* should, deprecated */ 00096 PGP_DIGEST_SHA1 = 2, /* must */ 00097 PGP_DIGEST_RIPEMD160 = 3, 00098 PGP_DIGEST_XSHA = 4, /* obsolete */ 00099 PGP_DIGEST_MD2 = 5, /* obsolete */ 00100 PGP_DIGEST_TIGER192 = 6, /* obsolete */ 00101 PGP_DIGEST_HAVAL5_160 = 7, /* obsolete */ 00102 PGP_DIGEST_SHA256 = 8, 00103 PGP_DIGEST_SHA384 = 9, 00104 PGP_DIGEST_SHA512 = 10 00105 }; 00106 00107 #define PGP_MAX_KEY (256/8) 00108 #define PGP_MAX_BLOCK (256/8) 00109 #define PGP_MAX_DIGEST (512/8) 00110 #define PGP_S2K_SALT 8 00111 00112 typedef struct PGP_MPI PGP_MPI; 00113 typedef struct PGP_PubKey PGP_PubKey; 00114 typedef struct PGP_Context PGP_Context; 00115 typedef struct PGP_S2K PGP_S2K; 00116 00117 struct PGP_S2K 00118 { 00119 uint8 mode; 00120 uint8 digest_algo; 00121 uint8 salt[8]; 00122 uint8 iter; 00123 /* calculated: */ 00124 uint8 key[PGP_MAX_KEY]; 00125 uint8 key_len; 00126 }; 00127 00128 00129 struct PGP_Context 00130 { 00131 /* 00132 * parameters 00133 */ 00134 PGP_S2K s2k; 00135 int s2k_mode; 00136 int s2k_digest_algo; 00137 int s2k_cipher_algo; 00138 int cipher_algo; 00139 int compress_algo; 00140 int compress_level; 00141 int disable_mdc; 00142 int use_sess_key; 00143 int text_mode; 00144 int convert_crlf; 00145 int unicode_mode; 00146 00147 /* 00148 * internal variables 00149 */ 00150 int mdc_checked; 00151 int corrupt_prefix; 00152 int in_mdc_pkt; 00153 int use_mdcbuf_filter; 00154 PX_MD *mdc_ctx; 00155 00156 PGP_PubKey *pub_key; /* ctx owns it */ 00157 const uint8 *sym_key; /* ctx does not own it */ 00158 int sym_key_len; 00159 00160 /* 00161 * read or generated data 00162 */ 00163 uint8 sess_key[PGP_MAX_KEY]; 00164 unsigned sess_key_len; 00165 }; 00166 00167 struct PGP_MPI 00168 { 00169 uint8 *data; 00170 int bits; 00171 int bytes; 00172 }; 00173 00174 struct PGP_PubKey 00175 { 00176 uint8 ver; 00177 uint8 time[4]; 00178 uint8 algo; 00179 00180 /* public part */ 00181 union 00182 { 00183 struct 00184 { 00185 PGP_MPI *p; 00186 PGP_MPI *g; 00187 PGP_MPI *y; 00188 } elg; 00189 struct 00190 { 00191 PGP_MPI *n; 00192 PGP_MPI *e; 00193 } rsa; 00194 struct 00195 { 00196 PGP_MPI *p; 00197 PGP_MPI *q; 00198 PGP_MPI *g; 00199 PGP_MPI *y; 00200 } dsa; 00201 } pub; 00202 00203 /* secret part */ 00204 union 00205 { 00206 struct 00207 { 00208 PGP_MPI *x; 00209 } elg; 00210 struct 00211 { 00212 PGP_MPI *d; 00213 PGP_MPI *p; 00214 PGP_MPI *q; 00215 PGP_MPI *u; 00216 } rsa; 00217 struct 00218 { 00219 PGP_MPI *x; 00220 } dsa; 00221 } sec; 00222 00223 uint8 key_id[8]; 00224 int can_encrypt; 00225 }; 00226 00227 int pgp_init(PGP_Context **ctx); 00228 int pgp_encrypt(PGP_Context *ctx, MBuf *src, MBuf *dst); 00229 int pgp_decrypt(PGP_Context *ctx, MBuf *src, MBuf *dst); 00230 int pgp_free(PGP_Context *ctx); 00231 00232 int pgp_get_digest_code(const char *name); 00233 int pgp_get_cipher_code(const char *name); 00234 const char *pgp_get_digest_name(int code); 00235 const char *pgp_get_cipher_name(int code); 00236 00237 int pgp_set_cipher_algo(PGP_Context *ctx, const char *name); 00238 int pgp_set_s2k_mode(PGP_Context *ctx, int type); 00239 int pgp_set_s2k_cipher_algo(PGP_Context *ctx, const char *name); 00240 int pgp_set_s2k_digest_algo(PGP_Context *ctx, const char *name); 00241 int pgp_set_convert_crlf(PGP_Context *ctx, int doit); 00242 int pgp_disable_mdc(PGP_Context *ctx, int disable); 00243 int pgp_set_sess_key(PGP_Context *ctx, int use); 00244 int pgp_set_compress_algo(PGP_Context *ctx, int algo); 00245 int pgp_set_compress_level(PGP_Context *ctx, int level); 00246 int pgp_set_text_mode(PGP_Context *ctx, int mode); 00247 int pgp_set_unicode_mode(PGP_Context *ctx, int mode); 00248 int pgp_get_unicode_mode(PGP_Context *ctx); 00249 00250 int pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int klen); 00251 int pgp_set_pubkey(PGP_Context *ctx, MBuf *keypkt, 00252 const uint8 *key, int klen, int pubtype); 00253 00254 int pgp_get_keyid(MBuf *pgp_data, char *dst); 00255 00256 /* internal functions */ 00257 00258 int pgp_load_digest(int c, PX_MD **res); 00259 int pgp_load_cipher(int c, PX_Cipher **res); 00260 int pgp_get_cipher_key_size(int c); 00261 int pgp_get_cipher_block_size(int c); 00262 00263 int pgp_s2k_fill(PGP_S2K *s2k, int mode, int digest_algo); 00264 int pgp_s2k_read(PullFilter *src, PGP_S2K *s2k); 00265 int pgp_s2k_process(PGP_S2K *s2k, int cipher, const uint8 *key, int klen); 00266 00267 typedef struct PGP_CFB PGP_CFB; 00268 int 00269 pgp_cfb_create(PGP_CFB **ctx_p, int algo, 00270 const uint8 *key, int key_len, int recync, uint8 *iv); 00271 void pgp_cfb_free(PGP_CFB *ctx); 00272 int pgp_cfb_encrypt(PGP_CFB *ctx, const uint8 *data, int len, uint8 *dst); 00273 int pgp_cfb_decrypt(PGP_CFB *ctx, const uint8 *data, int len, uint8 *dst); 00274 00275 int pgp_armor_encode(const uint8 *src, unsigned len, uint8 *dst); 00276 int pgp_armor_decode(const uint8 *src, unsigned len, uint8 *dst); 00277 unsigned pgp_armor_enc_len(unsigned len); 00278 unsigned pgp_armor_dec_len(unsigned len); 00279 00280 int pgp_compress_filter(PushFilter **res, PGP_Context *ctx, PushFilter *dst); 00281 int pgp_decompress_filter(PullFilter **res, PGP_Context *ctx, PullFilter *src); 00282 00283 int pgp_key_alloc(PGP_PubKey **pk_p); 00284 void pgp_key_free(PGP_PubKey *pk); 00285 int _pgp_read_public_key(PullFilter *pkt, PGP_PubKey **pk_p); 00286 00287 int pgp_parse_pubenc_sesskey(PGP_Context *ctx, PullFilter *pkt); 00288 int pgp_create_pkt_reader(PullFilter **pf_p, PullFilter *src, int len, 00289 int pkttype, PGP_Context *ctx); 00290 int pgp_parse_pkt_hdr(PullFilter *src, uint8 *tag, int *len_p, 00291 int allow_ctx); 00292 00293 int pgp_skip_packet(PullFilter *pkt); 00294 int pgp_expect_packet_end(PullFilter *pkt); 00295 00296 int pgp_write_pubenc_sesskey(PGP_Context *ctx, PushFilter *dst); 00297 int pgp_create_pkt_writer(PushFilter *dst, int tag, PushFilter **res_p); 00298 00299 int pgp_mpi_alloc(int bits, PGP_MPI **mpi); 00300 int pgp_mpi_create(uint8 *data, int bits, PGP_MPI **mpi); 00301 int pgp_mpi_free(PGP_MPI *mpi); 00302 int pgp_mpi_read(PullFilter *src, PGP_MPI **mpi); 00303 int pgp_mpi_write(PushFilter *dst, PGP_MPI *n); 00304 int pgp_mpi_hash(PX_MD *md, PGP_MPI *n); 00305 unsigned pgp_mpi_cksum(unsigned cksum, PGP_MPI *n); 00306 00307 int pgp_elgamal_encrypt(PGP_PubKey *pk, PGP_MPI *m, 00308 PGP_MPI **c1, PGP_MPI **c2); 00309 int pgp_elgamal_decrypt(PGP_PubKey *pk, PGP_MPI *c1, PGP_MPI *c2, 00310 PGP_MPI **m); 00311 int pgp_rsa_encrypt(PGP_PubKey *pk, PGP_MPI *m, PGP_MPI **c); 00312 int pgp_rsa_decrypt(PGP_PubKey *pk, PGP_MPI *c, PGP_MPI **m); 00313 00314 extern struct PullFilterOps pgp_decrypt_filter;
1.7.1