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d02b48c6 | 1 | /* crypto/pem/pem_seal.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
ae5c8664 | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
ae5c8664 | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
ae5c8664 | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
ae5c8664 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
ae5c8664 | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
ae5c8664 | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
ae5c8664 | 59 | #include <openssl/opensslconf.h> /* for OPENSSL_NO_RSA */ |
cf1b7d96 | 60 | #ifndef OPENSSL_NO_RSA |
ae5c8664 MC |
61 | # include <stdio.h> |
62 | # include "cryptlib.h" | |
63 | # include <openssl/evp.h> | |
64 | # include <openssl/rand.h> | |
65 | # include <openssl/objects.h> | |
66 | # include <openssl/x509.h> | |
67 | # include <openssl/pem.h> | |
68 | # include <openssl/rsa.h> | |
d02b48c6 | 69 | |
6b691a5c | 70 | int PEM_SealInit(PEM_ENCODE_SEAL_CTX *ctx, EVP_CIPHER *type, EVP_MD *md_type, |
ae5c8664 MC |
71 | unsigned char **ek, int *ekl, unsigned char *iv, |
72 | EVP_PKEY **pubk, int npubk) | |
73 | { | |
74 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
75 | int ret = -1; | |
76 | int i, j, max = 0; | |
77 | char *s = NULL; | |
78 | ||
79 | for (i = 0; i < npubk; i++) { | |
80 | if (pubk[i]->type != EVP_PKEY_RSA) { | |
81 | PEMerr(PEM_F_PEM_SEALINIT, PEM_R_PUBLIC_KEY_NO_RSA); | |
82 | goto err; | |
83 | } | |
84 | j = RSA_size(pubk[i]->pkey.rsa); | |
85 | if (j > max) | |
86 | max = j; | |
87 | } | |
88 | s = (char *)OPENSSL_malloc(max * 2); | |
89 | if (s == NULL) { | |
90 | PEMerr(PEM_F_PEM_SEALINIT, ERR_R_MALLOC_FAILURE); | |
91 | goto err; | |
92 | } | |
93 | ||
94 | EVP_EncodeInit(&ctx->encode); | |
95 | ||
96 | EVP_MD_CTX_init(&ctx->md); | |
97 | if (!EVP_SignInit(&ctx->md, md_type)) | |
98 | goto err; | |
99 | ||
100 | EVP_CIPHER_CTX_init(&ctx->cipher); | |
101 | ret = EVP_SealInit(&ctx->cipher, type, ek, ekl, iv, pubk, npubk); | |
102 | if (ret <= 0) | |
103 | goto err; | |
104 | ||
105 | /* base64 encode the keys */ | |
106 | for (i = 0; i < npubk; i++) { | |
107 | j = EVP_EncodeBlock((unsigned char *)s, ek[i], | |
108 | RSA_size(pubk[i]->pkey.rsa)); | |
109 | ekl[i] = j; | |
110 | memcpy(ek[i], s, j + 1); | |
111 | } | |
112 | ||
113 | ret = npubk; | |
114 | err: | |
115 | if (s != NULL) | |
116 | OPENSSL_free(s); | |
117 | OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); | |
118 | return (ret); | |
119 | } | |
d02b48c6 | 120 | |
6b691a5c | 121 | void PEM_SealUpdate(PEM_ENCODE_SEAL_CTX *ctx, unsigned char *out, int *outl, |
ae5c8664 MC |
122 | unsigned char *in, int inl) |
123 | { | |
124 | unsigned char buffer[1600]; | |
125 | int i, j; | |
126 | ||
127 | *outl = 0; | |
128 | EVP_SignUpdate(&ctx->md, in, inl); | |
129 | for (;;) { | |
130 | if (inl <= 0) | |
131 | break; | |
132 | if (inl > 1200) | |
133 | i = 1200; | |
134 | else | |
135 | i = inl; | |
136 | EVP_EncryptUpdate(&ctx->cipher, buffer, &j, in, i); | |
137 | EVP_EncodeUpdate(&ctx->encode, out, &j, buffer, j); | |
138 | *outl += j; | |
139 | out += j; | |
140 | in += i; | |
141 | inl -= i; | |
142 | } | |
143 | } | |
d02b48c6 | 144 | |
6b691a5c | 145 | int PEM_SealFinal(PEM_ENCODE_SEAL_CTX *ctx, unsigned char *sig, int *sigl, |
ae5c8664 MC |
146 | unsigned char *out, int *outl, EVP_PKEY *priv) |
147 | { | |
148 | unsigned char *s = NULL; | |
149 | int ret = 0, j; | |
150 | unsigned int i; | |
151 | ||
152 | if (priv->type != EVP_PKEY_RSA) { | |
153 | PEMerr(PEM_F_PEM_SEALFINAL, PEM_R_PUBLIC_KEY_NO_RSA); | |
154 | goto err; | |
155 | } | |
156 | i = RSA_size(priv->pkey.rsa); | |
157 | if (i < 100) | |
158 | i = 100; | |
159 | s = (unsigned char *)OPENSSL_malloc(i * 2); | |
160 | if (s == NULL) { | |
161 | PEMerr(PEM_F_PEM_SEALFINAL, ERR_R_MALLOC_FAILURE); | |
162 | goto err; | |
163 | } | |
164 | ||
165 | if (!EVP_EncryptFinal_ex(&ctx->cipher, s, (int *)&i)) | |
166 | goto err; | |
167 | EVP_EncodeUpdate(&ctx->encode, out, &j, s, i); | |
168 | *outl = j; | |
169 | out += j; | |
170 | EVP_EncodeFinal(&ctx->encode, out, &j); | |
171 | *outl += j; | |
172 | ||
173 | if (!EVP_SignFinal(&ctx->md, s, &i, priv)) | |
174 | goto err; | |
175 | *sigl = EVP_EncodeBlock(sig, s, i); | |
176 | ||
177 | ret = 1; | |
178 | err: | |
179 | EVP_MD_CTX_cleanup(&ctx->md); | |
180 | EVP_CIPHER_CTX_cleanup(&ctx->cipher); | |
181 | if (s != NULL) | |
182 | OPENSSL_free(s); | |
183 | return (ret); | |
184 | } | |
185 | #else /* !OPENSSL_NO_RSA */ | |
752d706a BL |
186 | |
187 | # if PEDANTIC | |
ae5c8664 | 188 | static void *dummy = &dummy; |
752d706a BL |
189 | # endif |
190 | ||
f5d7a031 | 191 | #endif |