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Commit | Line | Data |
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d3819813 | 1 | /* |
7bf7a6d0 | 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved. |
3e575651 | 3 | * |
7bf7a6d0 MTL |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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 | |
3e575651 SL |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
7bf7a6d0 | 11 | #include "internal/cryptlib.h" |
3e575651 SL |
12 | #include <openssl/pkcs12.h> |
13 | #include <openssl/bn.h> | |
14 | ||
15 | /* Uncomment out this line to get debugging info about key generation */ | |
d3819813 | 16 | /* |
7bf7a6d0 | 17 | * #define OPENSSL_DEBUG_KEYGEN |
d3819813 | 18 | */ |
7bf7a6d0 | 19 | #ifdef OPENSSL_DEBUG_KEYGEN |
d3819813 | 20 | # include <openssl/bio.h> |
3e575651 | 21 | extern BIO *bio_err; |
d3819813 | 22 | void h__dump(unsigned char *p, int len); |
3e575651 SL |
23 | #endif |
24 | ||
25 | /* PKCS12 compatible key/IV generation */ | |
26 | #ifndef min | |
d3819813 | 27 | # define min(a,b) ((a) < (b) ? (a) : (b)) |
3e575651 SL |
28 | #endif |
29 | ||
30 | int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt, | |
d3819813 MTL |
31 | int saltlen, int id, int iter, int n, |
32 | unsigned char *out, const EVP_MD *md_type) | |
3e575651 | 33 | { |
d3819813 MTL |
34 | int ret; |
35 | unsigned char *unipass; | |
36 | int uniplen; | |
37 | ||
38 | if (!pass) { | |
39 | unipass = NULL; | |
40 | uniplen = 0; | |
41 | } else if (!OPENSSL_asc2uni(pass, passlen, &unipass, &uniplen)) { | |
42 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC, ERR_R_MALLOC_FAILURE); | |
43 | return 0; | |
44 | } | |
45 | ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen, | |
46 | id, iter, n, out, md_type); | |
47 | if (ret <= 0) | |
48 | return 0; | |
7bf7a6d0 MTL |
49 | OPENSSL_clear_free(unipass, uniplen); |
50 | return ret; | |
51 | } | |
52 | ||
53 | int PKCS12_key_gen_utf8(const char *pass, int passlen, unsigned char *salt, | |
54 | int saltlen, int id, int iter, int n, | |
55 | unsigned char *out, const EVP_MD *md_type) | |
56 | { | |
57 | int ret; | |
58 | unsigned char *unipass; | |
59 | int uniplen; | |
60 | ||
61 | if (!pass) { | |
62 | unipass = NULL; | |
63 | uniplen = 0; | |
64 | } else if (!OPENSSL_utf82uni(pass, passlen, &unipass, &uniplen)) { | |
65 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UTF8, ERR_R_MALLOC_FAILURE); | |
66 | return 0; | |
d3819813 | 67 | } |
7bf7a6d0 MTL |
68 | ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen, |
69 | id, iter, n, out, md_type); | |
70 | if (ret <= 0) | |
71 | return 0; | |
72 | OPENSSL_clear_free(unipass, uniplen); | |
d3819813 | 73 | return ret; |
3e575651 SL |
74 | } |
75 | ||
76 | int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt, | |
d3819813 MTL |
77 | int saltlen, int id, int iter, int n, |
78 | unsigned char *out, const EVP_MD *md_type) | |
3e575651 | 79 | { |
7bf7a6d0 | 80 | unsigned char *B = NULL, *D = NULL, *I = NULL, *p = NULL, *Ai = NULL; |
d3819813 MTL |
81 | int Slen, Plen, Ilen, Ijlen; |
82 | int i, j, u, v; | |
83 | int ret = 0; | |
7bf7a6d0 MTL |
84 | BIGNUM *Ij = NULL, *Bpl1 = NULL; /* These hold Ij and B + 1 */ |
85 | EVP_MD_CTX *ctx = NULL; | |
86 | #ifdef OPENSSL_DEBUG_KEYGEN | |
d3819813 MTL |
87 | unsigned char *tmpout = out; |
88 | int tmpn = n; | |
3e575651 SL |
89 | #endif |
90 | ||
7bf7a6d0 MTL |
91 | ctx = EVP_MD_CTX_new(); |
92 | if (ctx == NULL) | |
93 | goto err; | |
3e575651 | 94 | |
7bf7a6d0 | 95 | #ifdef OPENSSL_DEBUG_KEYGEN |
d3819813 MTL |
96 | fprintf(stderr, "KEYGEN DEBUG\n"); |
97 | fprintf(stderr, "ID %d, ITER %d\n", id, iter); | |
98 | fprintf(stderr, "Password (length %d):\n", passlen); | |
99 | h__dump(pass, passlen); | |
100 | fprintf(stderr, "Salt (length %d):\n", saltlen); | |
101 | h__dump(salt, saltlen); | |
3e575651 | 102 | #endif |
d3819813 MTL |
103 | v = EVP_MD_block_size(md_type); |
104 | u = EVP_MD_size(md_type); | |
7bf7a6d0 MTL |
105 | if (u < 0 || v <= 0) |
106 | goto err; | |
d3819813 MTL |
107 | D = OPENSSL_malloc(v); |
108 | Ai = OPENSSL_malloc(u); | |
109 | B = OPENSSL_malloc(v + 1); | |
110 | Slen = v * ((saltlen + v - 1) / v); | |
111 | if (passlen) | |
112 | Plen = v * ((passlen + v - 1) / v); | |
113 | else | |
114 | Plen = 0; | |
115 | Ilen = Slen + Plen; | |
116 | I = OPENSSL_malloc(Ilen); | |
117 | Ij = BN_new(); | |
118 | Bpl1 = BN_new(); | |
7bf7a6d0 MTL |
119 | if (D == NULL || Ai == NULL || B == NULL || I == NULL || Ij == NULL |
120 | || Bpl1 == NULL) | |
d3819813 MTL |
121 | goto err; |
122 | for (i = 0; i < v; i++) | |
123 | D[i] = id; | |
124 | p = I; | |
125 | for (i = 0; i < Slen; i++) | |
126 | *p++ = salt[i % saltlen]; | |
127 | for (i = 0; i < Plen; i++) | |
128 | *p++ = pass[i % passlen]; | |
129 | for (;;) { | |
7bf7a6d0 MTL |
130 | if (!EVP_DigestInit_ex(ctx, md_type, NULL) |
131 | || !EVP_DigestUpdate(ctx, D, v) | |
132 | || !EVP_DigestUpdate(ctx, I, Ilen) | |
133 | || !EVP_DigestFinal_ex(ctx, Ai, NULL)) | |
d3819813 MTL |
134 | goto err; |
135 | for (j = 1; j < iter; j++) { | |
7bf7a6d0 MTL |
136 | if (!EVP_DigestInit_ex(ctx, md_type, NULL) |
137 | || !EVP_DigestUpdate(ctx, Ai, u) | |
138 | || !EVP_DigestFinal_ex(ctx, Ai, NULL)) | |
d3819813 MTL |
139 | goto err; |
140 | } | |
141 | memcpy(out, Ai, min(n, u)); | |
142 | if (u >= n) { | |
7bf7a6d0 | 143 | #ifdef OPENSSL_DEBUG_KEYGEN |
d3819813 MTL |
144 | fprintf(stderr, "Output KEY (length %d)\n", tmpn); |
145 | h__dump(tmpout, tmpn); | |
3e575651 | 146 | #endif |
d3819813 MTL |
147 | ret = 1; |
148 | goto end; | |
149 | } | |
150 | n -= u; | |
151 | out += u; | |
152 | for (j = 0; j < v; j++) | |
153 | B[j] = Ai[j % u]; | |
154 | /* Work out B + 1 first then can use B as tmp space */ | |
155 | if (!BN_bin2bn(B, v, Bpl1)) | |
156 | goto err; | |
157 | if (!BN_add_word(Bpl1, 1)) | |
158 | goto err; | |
159 | for (j = 0; j < Ilen; j += v) { | |
160 | if (!BN_bin2bn(I + j, v, Ij)) | |
161 | goto err; | |
162 | if (!BN_add(Ij, Ij, Bpl1)) | |
163 | goto err; | |
164 | if (!BN_bn2bin(Ij, B)) | |
165 | goto err; | |
166 | Ijlen = BN_num_bytes(Ij); | |
167 | /* If more than 2^(v*8) - 1 cut off MSB */ | |
168 | if (Ijlen > v) { | |
169 | if (!BN_bn2bin(Ij, B)) | |
170 | goto err; | |
171 | memcpy(I + j, B + 1, v); | |
3e575651 | 172 | #ifndef PKCS12_BROKEN_KEYGEN |
d3819813 MTL |
173 | /* If less than v bytes pad with zeroes */ |
174 | } else if (Ijlen < v) { | |
175 | memset(I + j, 0, v - Ijlen); | |
176 | if (!BN_bn2bin(Ij, I + j + v - Ijlen)) | |
177 | goto err; | |
3e575651 | 178 | #endif |
d3819813 MTL |
179 | } else if (!BN_bn2bin(Ij, I + j)) |
180 | goto err; | |
181 | } | |
182 | } | |
3e575651 | 183 | |
d3819813 MTL |
184 | err: |
185 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, ERR_R_MALLOC_FAILURE); | |
3e575651 | 186 | |
d3819813 MTL |
187 | end: |
188 | OPENSSL_free(Ai); | |
189 | OPENSSL_free(B); | |
190 | OPENSSL_free(D); | |
191 | OPENSSL_free(I); | |
192 | BN_free(Ij); | |
193 | BN_free(Bpl1); | |
7bf7a6d0 | 194 | EVP_MD_CTX_free(ctx); |
d3819813 | 195 | return ret; |
3e575651 | 196 | } |
d3819813 | 197 | |
7bf7a6d0 | 198 | #ifdef OPENSSL_DEBUG_KEYGEN |
d3819813 | 199 | void h__dump(unsigned char *p, int len) |
3e575651 | 200 | { |
d3819813 MTL |
201 | for (; len--; p++) |
202 | fprintf(stderr, "%02X", *p); | |
203 | fprintf(stderr, "\n"); | |
3e575651 SL |
204 | } |
205 | #endif |