diff options
Diffstat (limited to 'src/ltc/misc/pbes/pbes1.c')
| -rw-r--r-- | src/ltc/misc/pbes/pbes1.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/ltc/misc/pbes/pbes1.c b/src/ltc/misc/pbes/pbes1.c new file mode 100644 index 00000000..45b1a464 --- /dev/null +++ b/src/ltc/misc/pbes/pbes1.c @@ -0,0 +1,127 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ +#include "tomcrypt_private.h" + +#ifdef LTC_PBES + +static int _pkcs_5_alg1_wrap(const unsigned char *password, unsigned long password_len, + const unsigned char *salt, unsigned long salt_len, + int iteration_count, int hash_idx, + unsigned char *out, unsigned long *outlen) +{ + LTC_UNUSED_PARAM(salt_len); + return pkcs_5_alg1(password, password_len, salt, iteration_count, hash_idx, out, outlen); +} + +static int _pkcs_12_wrap(const unsigned char *password, unsigned long password_len, + const unsigned char *salt, unsigned long salt_len, + int iteration_count, int hash_idx, + unsigned char *out, unsigned long *outlen) +{ + int err; + /* convert password to unicode/utf16-be */ + unsigned long pwlen = password_len * 2; + unsigned char* pw; + if (*outlen < 32) return CRYPT_INVALID_ARG; + pw = XMALLOC(pwlen + 2); + if (pw == NULL) return CRYPT_MEM; + if ((err = pkcs12_utf8_to_utf16(password, password_len, pw, &pwlen) != CRYPT_OK)) goto LBL_ERROR; + pw[pwlen++] = 0; + pw[pwlen++] = 0; + /* derive KEY */ + if ((err = pkcs12_kdf(hash_idx, pw, pwlen, salt, salt_len, iteration_count, 1, out, 24)) != CRYPT_OK) goto LBL_ERROR; + /* derive IV */ + if ((err = pkcs12_kdf(hash_idx, pw, pwlen, salt, salt_len, iteration_count, 2, out+24, 8)) != CRYPT_OK) goto LBL_ERROR; + + *outlen = 32; +LBL_ERROR: + zeromem(pw, pwlen); + XFREE(pw); + return err; +} + +static const pbes_properties _pbes1_types[] = { + { _pkcs_5_alg1_wrap, "md2", "des", 8, 8 }, + { _pkcs_5_alg1_wrap, "md2", "rc2", 8, 8 }, + { _pkcs_5_alg1_wrap, "md5", "des", 8, 8 }, + { _pkcs_5_alg1_wrap, "md5", "rc2", 8, 8 }, + { _pkcs_5_alg1_wrap, "sha1", "des", 8, 8 }, + { _pkcs_5_alg1_wrap, "sha1", "rc2", 8, 8 }, + { _pkcs_12_wrap, "sha1", "3des", 24, 8 }, +}; + +typedef struct { + const pbes_properties *data; + const char *oid; +} oid_to_pbes; + +static const oid_to_pbes _pbes1_list[] = { + { &_pbes1_types[0], "1.2.840.113549.1.5.1" }, /* http://www.oid-info.com/get/1.2.840.113549.1.5.1 pbeWithMD2AndDES-CBC */ + { &_pbes1_types[1], "1.2.840.113549.1.5.4" }, /* http://www.oid-info.com/get/1.2.840.113549.1.5.4 pbeWithMD2AndRC2-CBC */ + { &_pbes1_types[2], "1.2.840.113549.1.5.3" }, /* http://www.oid-info.com/get/1.2.840.113549.1.5.3 pbeWithMD5AndDES-CBC */ + { &_pbes1_types[3], "1.2.840.113549.1.5.6" }, /* http://www.oid-info.com/get/1.2.840.113549.1.5.6 pbeWithMD5AndRC2-CBC */ + { &_pbes1_types[4], "1.2.840.113549.1.5.10" }, /* http://www.oid-info.com/get/1.2.840.113549.1.5.10 pbeWithSHA1AndDES-CBC */ + { &_pbes1_types[5], "1.2.840.113549.1.5.11" }, /* http://www.oid-info.com/get/1.2.840.113549.1.5.11 pbeWithSHA1AndRC2-CBC */ + { &_pbes1_types[6], "1.2.840.113549.1.12.1.3" }, /* http://www.oid-info.com/get/1.2.840.113549.1.12.1.3 pbeWithSHAAnd3-KeyTripleDES-CBC */ + { 0 }, +}; + +static int _pbes1_from_oid(const ltc_asn1_list *oid, pbes_properties *res) +{ + unsigned int i; + for (i = 0; _pbes1_list[i].data != NULL; ++i) { + if (pk_oid_cmp_with_asn1(_pbes1_list[i].oid, oid) == CRYPT_OK) { + if (res != NULL) *res = *_pbes1_list[i].data; + return CRYPT_OK; + } + } + return CRYPT_INVALID_ARG; +} + +/** + Extract PBES1 parameters + + @param s The start of the sequence with potential PBES1 parameters + @param res Pointer to where the extracted parameters should be stored + @return CRYPT_OK on success +*/ +int pbes1_extract(const ltc_asn1_list *s, pbes_arg *res) +{ + int err; + + LTC_ARGCHK(s != NULL); + LTC_ARGCHK(res != NULL); + + if ((err = _pbes1_from_oid(s, &res->type)) != CRYPT_OK) return err; + + if (!LTC_ASN1_IS_TYPE(s->next, LTC_ASN1_SEQUENCE) || + !LTC_ASN1_IS_TYPE(s->next->child, LTC_ASN1_OCTET_STRING) || + !LTC_ASN1_IS_TYPE(s->next->child->next, LTC_ASN1_INTEGER)) { + return CRYPT_INVALID_PACKET; + } + /* PBES1: encrypted pkcs8 - pbeWithMD5AndDES-CBC: + * 0:d=0 hl=4 l= 329 cons: SEQUENCE + * 4:d=1 hl=2 l= 27 cons: SEQUENCE + * 6:d=2 hl=2 l= 9 prim: OBJECT :pbeWithMD5AndDES-CBC (== 1.2.840.113549.1.5.3) (== *s) + * 17:d=2 hl=2 l= 14 cons: SEQUENCE (== *lalgparam) + * 19:d=3 hl=2 l= 8 prim: OCTET STRING [HEX DUMP]:8EDF749A06CCDE51 (== salt) + * 29:d=3 hl=2 l= 2 prim: INTEGER :0800 (== iterations) + * 33:d=1 hl=4 l= 296 prim: OCTET STRING :bytes (== encrypted data) + */ + res->salt = s->next->child; + res->iterations = mp_get_int(s->next->child->next->data); + + return CRYPT_OK; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |