65
66
/* PKCS#5 v2.0 password based encryption structures */
67
68
ASN1_SEQUENCE(PBE2PARAM) = {
68
ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
69
ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
69
ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
70
ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
70
71
} ASN1_SEQUENCE_END(PBE2PARAM)
72
73
IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
74
75
ASN1_SEQUENCE(PBKDF2PARAM) = {
75
ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
76
ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
77
ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
78
ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
76
ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
77
ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
78
ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
79
ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
79
80
} ASN1_SEQUENCE_END(PBKDF2PARAM)
81
82
IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
83
/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
84
* yes I know this is horrible!
85
* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: yes I know
86
* this is horrible! Extended version to allow application supplied PRF NID
90
X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
91
unsigned char *salt, int saltlen,
92
unsigned char *aiv, int prf_nid)
94
X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
97
unsigned char iv[EVP_MAX_IV_LENGTH];
98
PBE2PARAM *pbe2 = NULL;
101
alg_nid = EVP_CIPHER_type(cipher);
102
if (alg_nid == NID_undef) {
103
ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
104
ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
107
obj = OBJ_nid2obj(alg_nid);
109
if (!(pbe2 = PBE2PARAM_new()))
112
/* Setup the AlgorithmIdentifier for the encryption scheme */
113
scheme = pbe2->encryption;
115
scheme->algorithm = obj;
116
if (!(scheme->parameter = ASN1_TYPE_new()))
119
/* Create random IV */
120
if (EVP_CIPHER_iv_length(cipher)) {
122
memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
123
else if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
127
EVP_CIPHER_CTX_init(&ctx);
129
/* Dummy cipherinit to just setup the IV, and PRF */
130
if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0))
132
if (EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
133
ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
134
EVP_CIPHER_CTX_cleanup(&ctx);
138
* If prf NID unspecified see if cipher has a preference. An error is OK
139
* here: just means use default PRF.
141
if ((prf_nid == -1) &&
142
EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) {
144
prf_nid = NID_hmacWithSHA1;
146
EVP_CIPHER_CTX_cleanup(&ctx);
148
/* If its RC2 then we'd better setup the key length */
150
if (alg_nid == NID_rc2_cbc)
151
keylen = EVP_CIPHER_key_length(cipher);
157
X509_ALGOR_free(pbe2->keyfunc);
159
pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen);
164
/* Now set up top level AlgorithmIdentifier */
166
if (!(ret = X509_ALGOR_new()))
168
if (!(ret->parameter = ASN1_TYPE_new()))
171
ret->algorithm = OBJ_nid2obj(NID_pbes2);
173
/* Encode PBE2PARAM into parameter */
175
if (!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM),
176
&ret->parameter->value.sequence))
178
ret->parameter->type = V_ASN1_SEQUENCE;
180
PBE2PARAM_free(pbe2);
186
ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ERR_R_MALLOC_FAILURE);
189
PBE2PARAM_free(pbe2);
190
/* Note 'scheme' is freed as part of pbe2 */
191
X509_ALGOR_free(kalg);
192
X509_ALGOR_free(ret);
87
198
X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
88
unsigned char *salt, int saltlen)
90
X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
93
unsigned char iv[EVP_MAX_IV_LENGTH];
94
PBKDF2PARAM *kdf = NULL;
95
PBE2PARAM *pbe2 = NULL;
96
ASN1_OCTET_STRING *osalt = NULL;
99
alg_nid = EVP_CIPHER_type(cipher);
100
if(alg_nid == NID_undef) {
101
ASN1err(ASN1_F_PKCS5_PBE2_SET,
102
ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
105
obj = OBJ_nid2obj(alg_nid);
107
if(!(pbe2 = PBE2PARAM_new())) goto merr;
109
/* Setup the AlgorithmIdentifier for the encryption scheme */
110
scheme = pbe2->encryption;
112
scheme->algorithm = obj;
113
if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
115
/* Create random IV */
116
if (EVP_CIPHER_iv_length(cipher) &&
117
RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
120
EVP_CIPHER_CTX_init(&ctx);
122
/* Dummy cipherinit to just setup the IV */
123
EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0);
124
if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
125
ASN1err(ASN1_F_PKCS5_PBE2_SET,
126
ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
127
EVP_CIPHER_CTX_cleanup(&ctx);
130
EVP_CIPHER_CTX_cleanup(&ctx);
132
if(!(kdf = PBKDF2PARAM_new())) goto merr;
133
if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr;
135
if (!saltlen) saltlen = PKCS5_SALT_LEN;
136
if (!(osalt->data = OPENSSL_malloc (saltlen))) goto merr;
137
osalt->length = saltlen;
138
if (salt) memcpy (osalt->data, salt, saltlen);
139
else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr;
141
if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
142
if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr;
144
/* Now include salt in kdf structure */
145
kdf->salt->value.octet_string = osalt;
146
kdf->salt->type = V_ASN1_OCTET_STRING;
149
/* If its RC2 then we'd better setup the key length */
151
if(alg_nid == NID_rc2_cbc) {
152
if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr;
153
if(!ASN1_INTEGER_set (kdf->keylength,
154
EVP_CIPHER_key_length(cipher))) goto merr;
157
/* prf can stay NULL because we are using hmacWithSHA1 */
159
/* Now setup the PBE2PARAM keyfunc structure */
161
pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
163
/* Encode PBKDF2PARAM into parameter of pbe2 */
165
if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
167
if(!ASN1_pack_string_of(PBKDF2PARAM, kdf, i2d_PBKDF2PARAM,
168
&pbe2->keyfunc->parameter->value.sequence)) goto merr;
169
pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
171
PBKDF2PARAM_free(kdf);
174
/* Now set up top level AlgorithmIdentifier */
176
if(!(ret = X509_ALGOR_new())) goto merr;
177
if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
179
ret->algorithm = OBJ_nid2obj(NID_pbes2);
181
/* Encode PBE2PARAM into parameter */
183
if(!ASN1_pack_string_of(PBE2PARAM, pbe2, i2d_PBE2PARAM,
184
&ret->parameter->value.sequence)) goto merr;
185
ret->parameter->type = V_ASN1_SEQUENCE;
187
PBE2PARAM_free(pbe2);
193
ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE);
196
PBE2PARAM_free(pbe2);
197
/* Note 'scheme' is freed as part of pbe2 */
198
M_ASN1_OCTET_STRING_free(osalt);
199
PBKDF2PARAM_free(kdf);
200
X509_ALGOR_free(kalg);
201
X509_ALGOR_free(ret);
199
unsigned char *salt, int saltlen)
201
return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
204
X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
205
int prf_nid, int keylen)
207
X509_ALGOR *keyfunc = NULL;
208
PBKDF2PARAM *kdf = NULL;
209
ASN1_OCTET_STRING *osalt = NULL;
211
if (!(kdf = PBKDF2PARAM_new()))
213
if (!(osalt = M_ASN1_OCTET_STRING_new()))
216
kdf->salt->value.octet_string = osalt;
217
kdf->salt->type = V_ASN1_OCTET_STRING;
220
saltlen = PKCS5_SALT_LEN;
221
if (!(osalt->data = OPENSSL_malloc(saltlen)))
224
osalt->length = saltlen;
227
memcpy(osalt->data, salt, saltlen);
228
else if (RAND_pseudo_bytes(osalt->data, saltlen) < 0)
232
iter = PKCS5_DEFAULT_ITER;
234
if (!ASN1_INTEGER_set(kdf->iter, iter))
237
/* If have a key len set it up */
240
if (!(kdf->keylength = M_ASN1_INTEGER_new()))
242
if (!ASN1_INTEGER_set(kdf->keylength, keylen))
246
/* prf can stay NULL if we are using hmacWithSHA1 */
247
if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) {
248
kdf->prf = X509_ALGOR_new();
251
X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), V_ASN1_NULL, NULL);
254
/* Finally setup the keyfunc structure */
256
keyfunc = X509_ALGOR_new();
260
keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
262
/* Encode PBKDF2PARAM into parameter of pbe2 */
264
if (!(keyfunc->parameter = ASN1_TYPE_new()))
267
if (!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
268
&keyfunc->parameter->value.sequence))
270
keyfunc->parameter->type = V_ASN1_SEQUENCE;
272
PBKDF2PARAM_free(kdf);
276
ASN1err(ASN1_F_PKCS5_PBKDF2_SET, ERR_R_MALLOC_FAILURE);
277
PBKDF2PARAM_free(kdf);
278
X509_ALGOR_free(keyfunc);