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Commit | Line | Data |
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0f113f3e | 1 | /* |
f0efeea2 | 2 | * Copyright 1999-2019 The OpenSSL Project Authors. All Rights Reserved. |
97e4a932 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
97e4a932 | 8 | */ |
62867571 | 9 | |
97e4a932 DSH |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
b39fc560 | 12 | #include "internal/cryptlib.h" |
5a285add DM |
13 | #include <openssl/x509.h> |
14 | #include <openssl/evp.h> | |
15 | #include <openssl/kdf.h> | |
16 | #include <openssl/hmac.h> | |
3a9b3d2d | 17 | #include <openssl/trace.h> |
7707526b | 18 | #include <openssl/core_names.h> |
25f2138b | 19 | #include "crypto/evp.h" |
706457b7 | 20 | #include "evp_local.h" |
97e4a932 | 21 | |
856640b5 | 22 | int PKCS5_PBKDF2_HMAC(const char *pass, int passlen, |
0f113f3e MC |
23 | const unsigned char *salt, int saltlen, int iter, |
24 | const EVP_MD *digest, int keylen, unsigned char *out) | |
25 | { | |
fa013b65 | 26 | const char *empty = ""; |
7707526b P |
27 | int rv = 1, mode = 1; |
28 | EVP_KDF *kdf; | |
5a285add | 29 | EVP_KDF_CTX *kctx; |
7707526b P |
30 | const char *mdname = EVP_MD_name(digest); |
31 | OSSL_PARAM params[6], *p = params; | |
0f113f3e | 32 | |
5a285add | 33 | /* Keep documented behaviour. */ |
fa013b65 PB |
34 | if (pass == NULL) { |
35 | pass = empty; | |
0f113f3e | 36 | passlen = 0; |
fa013b65 | 37 | } else if (passlen == -1) { |
0f113f3e | 38 | passlen = strlen(pass); |
fa013b65 | 39 | } |
5a285add DM |
40 | if (salt == NULL && saltlen == 0) |
41 | salt = (unsigned char *)empty; | |
42 | ||
64115f05 | 43 | kdf = EVP_KDF_fetch(NULL, OSSL_KDF_NAME_PBKDF2, NULL); |
7707526b P |
44 | kctx = EVP_KDF_CTX_new(kdf); |
45 | EVP_KDF_free(kdf); | |
5a285add | 46 | if (kctx == NULL) |
0f113f3e | 47 | return 0; |
7707526b P |
48 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD, |
49 | (char *)pass, (size_t)passlen); | |
50 | *p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_PKCS5, &mode); | |
51 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, | |
52 | (unsigned char *)salt, saltlen); | |
53 | *p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_ITER, &iter); | |
54 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, | |
55 | (char *)mdname, strlen(mdname) + 1); | |
56 | *p = OSSL_PARAM_construct_end(); | |
57 | if (EVP_KDF_CTX_set_params(kctx, params) != 1 | |
5a285add DM |
58 | || EVP_KDF_derive(kctx, out, keylen) != 1) |
59 | rv = 0; | |
60 | ||
61 | EVP_KDF_CTX_free(kctx); | |
62 | ||
3a9b3d2d RL |
63 | OSSL_TRACE_BEGIN(PKCS5V2) { |
64 | BIO_printf(trc_out, "Password:\n"); | |
65 | BIO_hex_string(trc_out, | |
66 | 0, passlen, pass, passlen); | |
67 | BIO_printf(trc_out, "\n"); | |
68 | BIO_printf(trc_out, "Salt:\n"); | |
69 | BIO_hex_string(trc_out, | |
70 | 0, saltlen, salt, saltlen); | |
71 | BIO_printf(trc_out, "\n"); | |
72 | BIO_printf(trc_out, "Iteration count %d\n", iter); | |
73 | BIO_printf(trc_out, "Key:\n"); | |
74 | BIO_hex_string(trc_out, | |
75 | 0, keylen, out, keylen); | |
76 | BIO_printf(trc_out, "\n"); | |
77 | } OSSL_TRACE_END(PKCS5V2); | |
5a285add | 78 | return rv; |
0f113f3e | 79 | } |
856640b5 DSH |
80 | |
81 | int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen, | |
0f113f3e MC |
82 | const unsigned char *salt, int saltlen, int iter, |
83 | int keylen, unsigned char *out) | |
84 | { | |
85 | return PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, EVP_sha1(), | |
86 | keylen, out); | |
87 | } | |
88 | ||
0f113f3e MC |
89 | /* |
90 | * Now the key derivation function itself. This is a bit evil because it has | |
91 | * to check the ASN1 parameters are valid: and there are quite a few of | |
92 | * them... | |
97e4a932 DSH |
93 | */ |
94 | ||
95 | int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen, | |
0f113f3e MC |
96 | ASN1_TYPE *param, const EVP_CIPHER *c, |
97 | const EVP_MD *md, int en_de) | |
97e4a932 | 98 | { |
0f113f3e MC |
99 | PBE2PARAM *pbe2 = NULL; |
100 | const EVP_CIPHER *cipher; | |
d6c5462e | 101 | EVP_PBE_KEYGEN *kdf; |
0f113f3e MC |
102 | |
103 | int rv = 0; | |
104 | ||
e93c8748 DSH |
105 | pbe2 = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBE2PARAM), param); |
106 | if (pbe2 == NULL) { | |
0f113f3e MC |
107 | EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); |
108 | goto err; | |
109 | } | |
110 | ||
111 | /* See if we recognise the key derivation function */ | |
d6c5462e | 112 | if (!EVP_PBE_find(EVP_PBE_TYPE_KDF, OBJ_obj2nid(pbe2->keyfunc->algorithm), |
dccd20d1 | 113 | NULL, NULL, &kdf)) { |
0f113f3e MC |
114 | EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, |
115 | EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION); | |
116 | goto err; | |
117 | } | |
118 | ||
119 | /* | |
120 | * lets see if we recognise the encryption algorithm. | |
121 | */ | |
122 | ||
123 | cipher = EVP_get_cipherbyobj(pbe2->encryption->algorithm); | |
124 | ||
125 | if (!cipher) { | |
126 | EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_CIPHER); | |
127 | goto err; | |
128 | } | |
129 | ||
130 | /* Fixup cipher based on AlgorithmIdentifier */ | |
131 | if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de)) | |
132 | goto err; | |
133 | if (EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) { | |
134 | EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_CIPHER_PARAMETER_ERROR); | |
135 | goto err; | |
136 | } | |
d6c5462e | 137 | rv = kdf(ctx, pass, passlen, pbe2->keyfunc->parameter, NULL, NULL, en_de); |
0f113f3e MC |
138 | err: |
139 | PBE2PARAM_free(pbe2); | |
140 | return rv; | |
3d63b396 DSH |
141 | } |
142 | ||
0f113f3e MC |
143 | int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, |
144 | int passlen, ASN1_TYPE *param, | |
145 | const EVP_CIPHER *c, const EVP_MD *md, int en_de) | |
3d63b396 | 146 | { |
0f113f3e | 147 | unsigned char *salt, key[EVP_MAX_KEY_LENGTH]; |
ea053ec9 | 148 | int saltlen, iter, t; |
0f113f3e MC |
149 | int rv = 0; |
150 | unsigned int keylen = 0; | |
151 | int prf_nid, hmac_md_nid; | |
152 | PBKDF2PARAM *kdf = NULL; | |
153 | const EVP_MD *prfmd; | |
154 | ||
155 | if (EVP_CIPHER_CTX_cipher(ctx) == NULL) { | |
156 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_NO_CIPHER_SET); | |
157 | goto err; | |
158 | } | |
159 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
cbe29648 | 160 | OPENSSL_assert(keylen <= sizeof(key)); |
0f113f3e MC |
161 | |
162 | /* Decode parameter */ | |
163 | ||
e93c8748 | 164 | kdf = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM), param); |
0f113f3e | 165 | |
e93c8748 | 166 | if (kdf == NULL) { |
0f113f3e MC |
167 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_DECODE_ERROR); |
168 | goto err; | |
169 | } | |
170 | ||
ea053ec9 P |
171 | t = EVP_CIPHER_CTX_key_length(ctx); |
172 | if (t < 0) { | |
173 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_INVALID_KEY_LENGTH); | |
174 | goto err; | |
175 | } | |
176 | keylen = t; | |
0f113f3e MC |
177 | |
178 | /* Now check the parameters of the kdf */ | |
179 | ||
180 | if (kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)) { | |
181 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_KEYLENGTH); | |
182 | goto err; | |
183 | } | |
184 | ||
185 | if (kdf->prf) | |
186 | prf_nid = OBJ_obj2nid(kdf->prf->algorithm); | |
187 | else | |
188 | prf_nid = NID_hmacWithSHA1; | |
189 | ||
190 | if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0)) { | |
191 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF); | |
192 | goto err; | |
193 | } | |
194 | ||
195 | prfmd = EVP_get_digestbynid(hmac_md_nid); | |
196 | if (prfmd == NULL) { | |
197 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF); | |
198 | goto err; | |
199 | } | |
200 | ||
201 | if (kdf->salt->type != V_ASN1_OCTET_STRING) { | |
202 | EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_SALT_TYPE); | |
203 | goto err; | |
204 | } | |
205 | ||
206 | /* it seems that its all OK */ | |
207 | salt = kdf->salt->value.octet_string->data; | |
208 | saltlen = kdf->salt->value.octet_string->length; | |
209 | iter = ASN1_INTEGER_get(kdf->iter); | |
210 | if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, prfmd, | |
211 | keylen, key)) | |
212 | goto err; | |
213 | rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de); | |
214 | err: | |
215 | OPENSSL_cleanse(key, keylen); | |
216 | PBKDF2PARAM_free(kdf); | |
217 | return rv; | |
97e4a932 | 218 | } |