diff options
Diffstat (limited to 'contrib/pgcrypto/pgp.c')
| -rw-r--r-- | contrib/pgcrypto/pgp.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/contrib/pgcrypto/pgp.c b/contrib/pgcrypto/pgp.c new file mode 100644 index 0000000..8a6a6c2 --- /dev/null +++ b/contrib/pgcrypto/pgp.c @@ -0,0 +1,360 @@ +/* + * pgp.c + * Various utility stuff. + * + * Copyright (c) 2005 Marko Kreen + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * contrib/pgcrypto/pgp.c + */ + +#include "postgres.h" + +#include "pgp.h" +#include "px.h" + +/* + * Defaults. + */ +static int def_cipher_algo = PGP_SYM_AES_128; +static int def_s2k_cipher_algo = -1; +static int def_s2k_mode = PGP_S2K_ISALTED; +static int def_s2k_count = -1; +static int def_s2k_digest_algo = PGP_DIGEST_SHA1; +static int def_compress_algo = PGP_COMPR_NONE; +static int def_compress_level = 6; +static int def_disable_mdc = 0; +static int def_use_sess_key = 0; +static int def_text_mode = 0; +static int def_unicode_mode = 0; +static int def_convert_crlf = 0; + +struct digest_info +{ + const char *name; + int code; +}; + +struct cipher_info +{ + const char *name; + int code; + const char *int_name; + int key_len; + int block_len; +}; + +static const struct digest_info digest_list[] = { + {"md5", PGP_DIGEST_MD5}, + {"sha1", PGP_DIGEST_SHA1}, + {"sha-1", PGP_DIGEST_SHA1}, + {"ripemd160", PGP_DIGEST_RIPEMD160}, + {"sha256", PGP_DIGEST_SHA256}, + {"sha384", PGP_DIGEST_SHA384}, + {"sha512", PGP_DIGEST_SHA512}, + {NULL, 0} +}; + +static const struct cipher_info cipher_list[] = { + {"3des", PGP_SYM_DES3, "3des-ecb", 192 / 8, 64 / 8}, + {"cast5", PGP_SYM_CAST5, "cast5-ecb", 128 / 8, 64 / 8}, + {"bf", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8}, + {"blowfish", PGP_SYM_BLOWFISH, "bf-ecb", 128 / 8, 64 / 8}, + {"aes", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8}, + {"aes128", PGP_SYM_AES_128, "aes-ecb", 128 / 8, 128 / 8}, + {"aes192", PGP_SYM_AES_192, "aes-ecb", 192 / 8, 128 / 8}, + {"aes256", PGP_SYM_AES_256, "aes-ecb", 256 / 8, 128 / 8}, + {"twofish", PGP_SYM_TWOFISH, "twofish-ecb", 256 / 8, 128 / 8}, + {NULL, 0, NULL} +}; + +static const struct cipher_info * +get_cipher_info(int code) +{ + const struct cipher_info *i; + + for (i = cipher_list; i->name; i++) + if (i->code == code) + return i; + return NULL; +} + +int +pgp_get_digest_code(const char *name) +{ + const struct digest_info *i; + + for (i = digest_list; i->name; i++) + if (pg_strcasecmp(i->name, name) == 0) + return i->code; + return PXE_PGP_UNSUPPORTED_HASH; +} + +int +pgp_get_cipher_code(const char *name) +{ + const struct cipher_info *i; + + for (i = cipher_list; i->name; i++) + if (pg_strcasecmp(i->name, name) == 0) + return i->code; + return PXE_PGP_UNSUPPORTED_CIPHER; +} + +const char * +pgp_get_digest_name(int code) +{ + const struct digest_info *i; + + for (i = digest_list; i->name; i++) + if (i->code == code) + return i->name; + return NULL; +} + +int +pgp_get_cipher_key_size(int code) +{ + const struct cipher_info *i = get_cipher_info(code); + + if (i != NULL) + return i->key_len; + return 0; +} + +int +pgp_get_cipher_block_size(int code) +{ + const struct cipher_info *i = get_cipher_info(code); + + if (i != NULL) + return i->block_len; + return 0; +} + +int +pgp_load_cipher(int code, PX_Cipher **res) +{ + int err; + const struct cipher_info *i = get_cipher_info(code); + + if (i == NULL) + return PXE_PGP_CORRUPT_DATA; + + err = px_find_cipher(i->int_name, res); + if (err == 0) + return 0; + + return PXE_PGP_UNSUPPORTED_CIPHER; +} + +int +pgp_load_digest(int code, PX_MD **res) +{ + int err; + const char *name = pgp_get_digest_name(code); + + if (name == NULL) + return PXE_PGP_CORRUPT_DATA; + + err = px_find_digest(name, res); + if (err == 0) + return 0; + + return PXE_PGP_UNSUPPORTED_HASH; +} + +int +pgp_init(PGP_Context **ctx_p) +{ + PGP_Context *ctx; + + ctx = palloc0(sizeof *ctx); + + ctx->cipher_algo = def_cipher_algo; + ctx->s2k_cipher_algo = def_s2k_cipher_algo; + ctx->s2k_mode = def_s2k_mode; + ctx->s2k_count = def_s2k_count; + ctx->s2k_digest_algo = def_s2k_digest_algo; + ctx->compress_algo = def_compress_algo; + ctx->compress_level = def_compress_level; + ctx->disable_mdc = def_disable_mdc; + ctx->use_sess_key = def_use_sess_key; + ctx->unicode_mode = def_unicode_mode; + ctx->convert_crlf = def_convert_crlf; + ctx->text_mode = def_text_mode; + + *ctx_p = ctx; + return 0; +} + +int +pgp_free(PGP_Context *ctx) +{ + if (ctx->pub_key) + pgp_key_free(ctx->pub_key); + px_memset(ctx, 0, sizeof *ctx); + pfree(ctx); + return 0; +} + +int +pgp_disable_mdc(PGP_Context *ctx, int disable) +{ + ctx->disable_mdc = disable ? 1 : 0; + return 0; +} + +int +pgp_set_sess_key(PGP_Context *ctx, int use) +{ + ctx->use_sess_key = use ? 1 : 0; + return 0; +} + +int +pgp_set_convert_crlf(PGP_Context *ctx, int doit) +{ + ctx->convert_crlf = doit ? 1 : 0; + return 0; +} + +int +pgp_set_s2k_mode(PGP_Context *ctx, int mode) +{ + int err = PXE_OK; + + switch (mode) + { + case PGP_S2K_SIMPLE: + case PGP_S2K_SALTED: + case PGP_S2K_ISALTED: + ctx->s2k_mode = mode; + break; + default: + err = PXE_ARGUMENT_ERROR; + break; + } + return err; +} + +int +pgp_set_s2k_count(PGP_Context *ctx, int count) +{ + if (ctx->s2k_mode == PGP_S2K_ISALTED && count >= 1024 && count <= 65011712) + { + ctx->s2k_count = count; + return PXE_OK; + } + return PXE_ARGUMENT_ERROR; +} + +int +pgp_set_compress_algo(PGP_Context *ctx, int algo) +{ + switch (algo) + { + case PGP_COMPR_NONE: + case PGP_COMPR_ZIP: + case PGP_COMPR_ZLIB: + case PGP_COMPR_BZIP2: + ctx->compress_algo = algo; + return 0; + } + return PXE_ARGUMENT_ERROR; +} + +int +pgp_set_compress_level(PGP_Context *ctx, int level) +{ + if (level >= 0 && level <= 9) + { + ctx->compress_level = level; + return 0; + } + return PXE_ARGUMENT_ERROR; +} + +int +pgp_set_text_mode(PGP_Context *ctx, int mode) +{ + ctx->text_mode = mode; + return 0; +} + +int +pgp_set_cipher_algo(PGP_Context *ctx, const char *name) +{ + int code = pgp_get_cipher_code(name); + + if (code < 0) + return code; + ctx->cipher_algo = code; + return 0; +} + +int +pgp_set_s2k_cipher_algo(PGP_Context *ctx, const char *name) +{ + int code = pgp_get_cipher_code(name); + + if (code < 0) + return code; + ctx->s2k_cipher_algo = code; + return 0; +} + +int +pgp_set_s2k_digest_algo(PGP_Context *ctx, const char *name) +{ + int code = pgp_get_digest_code(name); + + if (code < 0) + return code; + ctx->s2k_digest_algo = code; + return 0; +} + +int +pgp_get_unicode_mode(PGP_Context *ctx) +{ + return ctx->unicode_mode; +} + +int +pgp_set_unicode_mode(PGP_Context *ctx, int mode) +{ + ctx->unicode_mode = mode ? 1 : 0; + return 0; +} + +int +pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int len) +{ + if (key == NULL || len < 1) + return PXE_ARGUMENT_ERROR; + ctx->sym_key = key; + ctx->sym_key_len = len; + return 0; +} |