Annotation of embedaddon/strongswan/src/libstrongswan/plugins/openssl/openssl_util.h, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 2008 Tobias Brunner
3: * HSR Hochschule fuer Technik Rapperswil
4: *
5: * This program is free software; you can redistribute it and/or modify it
6: * under the terms of the GNU General Public License as published by the
7: * Free Software Foundation; either version 2 of the License, or (at your
8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9: *
10: * This program is distributed in the hope that it will be useful, but
11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13: * for more details.
14: */
15:
16: /**
17: * @defgroup openssl_util openssl_util
18: * @{ @ingroup openssl_p
19: */
20:
21: #ifndef OPENSSL_UTIL_H_
22: #define OPENSSL_UTIL_H_
23:
24: #include <library.h>
25:
26: #ifdef X509_NAME
27: /* from <wincrypt.h> */
28: # undef X509_NAME
29: #endif
30:
31: #include <openssl/bn.h>
32: #include <openssl/asn1.h>
33:
34: /**
35: * Returns the length in bytes of a field element
36: */
37: #define EC_FIELD_ELEMENT_LEN(group) ((EC_GROUP_get_degree(group) + 7) / 8)
38:
39: /**
40: * Creates a hash of a given type of a chunk of data.
41: *
42: * Note: this function allocates memory for the hash
43: *
44: * @param hash_type NID of the hash
45: * @param data the chunk of data to hash
46: * @param hash chunk that contains the hash
47: * @return TRUE on success, FALSE otherwise
48: */
49: bool openssl_hash_chunk(int hash_type, chunk_t data, chunk_t *hash);
50:
51: /**
52: * Concatenates two bignums into a chunk, thereby enforcing the length of
53: * a single BIGNUM, if necessary, by pre-pending it with zeros.
54: *
55: * Note: this function allocates memory for the chunk
56: *
57: * @param len the length of a single BIGNUM
58: * @param a first BIGNUM
59: * @param b second BIGNUM
60: * @param chunk resulting chunk
61: * @return TRUE on success, FALSE otherwise
62: */
63: bool openssl_bn_cat(const int len, const BIGNUM *a, const BIGNUM *b,
64: chunk_t *chunk);
65:
66: /**
67: * Splits a chunk into two bignums of equal binary length.
68: *
69: * @param chunk a chunk that contains the two BIGNUMs
70: * @param a first BIGNUM
71: * @param b second BIGNUM
72: * @return TRUE on success, FALSE otherwise
73: */
74: bool openssl_bn_split(chunk_t chunk, BIGNUM *a, BIGNUM *b);
75:
76: /**
77: * Exports the given bignum (assumed to be a positive number) to a chunk in
78: * two's complement format (i.e. a zero byte is added if the MSB is set).
79: *
80: * @param bn the BIGNUM to export
81: * @param chunk the chunk (data gets allocated)
82: * @return TRUE on success, FALSE otherwise
83: */
84: bool openssl_bn2chunk(const BIGNUM *bn, chunk_t *chunk);
85:
86: /**
87: * Allocate a chunk using the i2d function of a given object
88: *
89: * @param type type of the object
90: * @param obj object to convert to DER
91: * @returns allocated chunk of the object, or chunk_empty
92: */
93: #define openssl_i2chunk(type, obj) ({ \
94: unsigned char *ptr = NULL; \
95: int len = i2d_##type(obj, &ptr); \
96: len < 0 ? chunk_empty : chunk_create(ptr, len);})
97:
98: /**
99: * Convert an OpenSSL ASN1_OBJECT to a chunk.
100: *
101: * @param asn1 asn1 object to convert
102: * @return chunk, pointing into asn1 object
103: */
104: chunk_t openssl_asn1_obj2chunk(const ASN1_OBJECT *asn1);
105:
106: /**
107: * Convert an OpenSSL ASN1_STRING to a chunk.
108: *
109: * @param asn1 asn1 string to convert
110: * @return chunk, pointing into asn1 string
111: */
112: chunk_t openssl_asn1_str2chunk(const ASN1_STRING *asn1);
113:
114: /**
115: * Convert an openssl X509_NAME to a identification_t of type ID_DER_ASN1_DN.
116: *
117: * @param name name to convert
118: * @return identification_t, NULL on error
119: */
120: identification_t *openssl_x509_name2id(X509_NAME *name);
121:
122: /**
123: * Check if an ASN1 oid is a an OID known by libstrongswan.
124: *
125: * @param obj openssl ASN1 object
126: * @returns OID, as defined in <asn1/oid.h>
127: */
128: int openssl_asn1_known_oid(const ASN1_OBJECT *obj);
129:
130: /**
131: * Convert an OpenSSL ASN1_TIME to a time_t.
132: *
133: * @param time openssl ASN1_TIME
134: * @returns time_t, 0 on error
135: */
136: time_t openssl_asn1_to_time(const ASN1_TIME *time);
137:
138: /**
139: * Compatibility macros
140: */
141: #ifdef OPENSSL_IS_BORINGSSL
142: #define EVP_PKEY_base_id(p) EVP_PKEY_type(p->type)
143: #endif
144:
145: /**
146: * Macros to define fallback getters/setters to access keys (BIGNUM*) for types
147: * that were made opaque with OpenSSL 1.1.0.
148: */
149: #define OPENSSL_KEY_FALLBACK(...) VA_ARGS_DISPATCH(OPENSSL_KEY_FALLBACK, __VA_ARGS__)(__VA_ARGS__)
150: #define OPENSSL_KEY_FALLBACK3(type, k1, k2) \
151: __attribute__((unused)) \
152: static inline void type##_get0(const type *o, const BIGNUM **k1, const BIGNUM **k2) { \
153: if (k1) *k1 = o->k1; \
154: if (k2) *k2 = o->k2; } \
155: __attribute__((unused)) \
156: static inline int type##_set0(type *o, BIGNUM *k1, BIGNUM *k2) { \
157: if (k1) { BN_clear_free(o->k1); o->k1 = k1; } \
158: if (k2) { BN_clear_free(o->k2); o->k2 = k2; } \
159: return 1; }
160: #define OPENSSL_KEY_FALLBACK4(type, name, k1, k2) \
161: __attribute__((unused)) \
162: static inline void type##_get0_##name(const type *o, const BIGNUM **k1, const BIGNUM **k2) { \
163: if (k1) *k1 = o->k1; \
164: if (k2) *k2 = o->k2; } \
165: __attribute__((unused)) \
166: static inline int type##_set0_##name(type *o, BIGNUM *k1, BIGNUM *k2) { \
167: if (k1) { BN_clear_free(o->k1); o->k1 = k1; } \
168: if (k2) { BN_clear_free(o->k2); o->k2 = k2; } \
169: return 1; }
170: #define OPENSSL_KEY_FALLBACK5(type, name, k1, k2, k3) \
171: __attribute__((unused)) \
172: static inline void type##_get0_##name(const type *o, const BIGNUM **k1, const BIGNUM **k2, const BIGNUM **k3) { \
173: if (k1) *k1 = o->k1; \
174: if (k2) *k2 = o->k2; \
175: if (k3) *k3 = o->k3; } \
176: __attribute__((unused)) \
177: static inline int type##_set0_##name(type *o, BIGNUM *k1, BIGNUM *k2, BIGNUM *k3) { \
178: if (k1) { BN_clear_free(o->k1); o->k1 = k1; } \
179: if (k2) { BN_clear_free(o->k2); o->k2 = k2; } \
180: if (k3) { BN_clear_free(o->k3); o->k3 = k3; } \
181: return 1; }
182:
183: #endif /** OPENSSL_UTIL_H_ @}*/
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