1 /* fipe/evp/fips_enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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 :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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
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.]
59 #define OPENSSL_FIPSAPI
63 #include <openssl/evp.h>
64 #include <openssl/err.h>
65 #include <openssl/fips.h>
67 void FIPS_cipher_ctx_init(EVP_CIPHER_CTX *ctx)
69 memset(ctx,0,sizeof(EVP_CIPHER_CTX));
70 /* ctx->cipher=NULL; */
73 EVP_CIPHER_CTX *FIPS_cipher_ctx_new(void)
75 EVP_CIPHER_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
77 FIPS_cipher_ctx_init(ctx);
81 /* The purpose of these is to trap programs that attempt to use non FIPS
82 * algorithms in FIPS mode and ignore the errors.
85 static int bad_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
86 const unsigned char *iv, int enc)
87 { FIPS_ERROR_IGNORED("Cipher init"); return 0;}
89 static int bad_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
90 const unsigned char *in, size_t inl)
91 { FIPS_ERROR_IGNORED("Cipher update"); return 0;}
93 /* NB: no cleanup because it is allowed after failed init */
95 static int bad_set_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
96 { FIPS_ERROR_IGNORED("Cipher set_asn1"); return 0;}
97 static int bad_get_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
98 { FIPS_ERROR_IGNORED("Cipher get_asn1"); return 0;}
99 static int bad_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
100 { FIPS_ERROR_IGNORED("Cipher ctrl"); return 0;}
102 static const EVP_CIPHER bad_cipher =
119 int FIPS_cipherinit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
120 const unsigned char *key, const unsigned char *iv, int enc)
122 if(FIPS_selftest_failed())
124 FIPSerr(FIPS_F_FIPS_CIPHERINIT,FIPS_R_FIPS_SELFTEST_FAILED);
125 ctx->cipher = &bad_cipher;
138 /* Only FIPS ciphers allowed */
139 if (FIPS_mode() && !(cipher->flags & EVP_CIPH_FLAG_FIPS) &&
140 !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
142 EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_DISABLED_FOR_FIPS);
143 ctx->cipher = &bad_cipher;
146 /* Ensure a context left lying around from last time is cleared
147 * (the previous check attempted to avoid this if the same
148 * ENGINE and EVP_CIPHER could be used). */
149 FIPS_cipher_ctx_cleanup(ctx);
151 /* Restore encrypt field: it is zeroed by cleanup */
155 if (ctx->cipher->ctx_size)
157 ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
158 if (!ctx->cipher_data)
160 EVPerr(EVP_F_FIPS_CIPHERINIT, ERR_R_MALLOC_FAILURE);
166 ctx->cipher_data = NULL;
168 ctx->key_len = cipher->key_len;
170 if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
172 if(!FIPS_cipher_ctx_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
174 EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
179 else if(!ctx->cipher)
181 EVPerr(EVP_F_FIPS_CIPHERINIT, EVP_R_NO_CIPHER_SET);
184 /* we assume block size is a power of 2 in *cryptUpdate */
185 OPENSSL_assert(ctx->cipher->block_size == 1
186 || ctx->cipher->block_size == 8
187 || ctx->cipher->block_size == 16);
189 if(!(M_EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
190 switch(M_EVP_CIPHER_CTX_mode(ctx)) {
192 case EVP_CIPH_STREAM_CIPHER:
193 case EVP_CIPH_ECB_MODE:
196 case EVP_CIPH_CFB_MODE:
197 case EVP_CIPH_OFB_MODE:
202 case EVP_CIPH_CBC_MODE:
204 OPENSSL_assert(M_EVP_CIPHER_CTX_iv_length(ctx) <=
205 (int)sizeof(ctx->iv));
206 if(iv) memcpy(ctx->oiv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
207 memcpy(ctx->iv, ctx->oiv, M_EVP_CIPHER_CTX_iv_length(ctx));
210 case EVP_CIPH_CTR_MODE:
211 /* Don't reuse IV for CTR mode */
213 memcpy(ctx->iv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
222 if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
223 if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
227 ctx->block_mask=ctx->cipher->block_size-1;
231 void FIPS_cipher_ctx_free(EVP_CIPHER_CTX *ctx)
235 FIPS_cipher_ctx_cleanup(ctx);
240 int FIPS_cipher_ctx_cleanup(EVP_CIPHER_CTX *c)
242 if (c->cipher != NULL)
244 if(c->cipher->cleanup && !c->cipher->cleanup(c))
246 /* Cleanse cipher context data */
248 OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
251 OPENSSL_free(c->cipher_data);
252 memset(c,0,sizeof(EVP_CIPHER_CTX));
256 int FIPS_cipher_ctx_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
260 EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
263 FIPS_selftest_check();
265 if(!ctx->cipher->ctrl) {
266 EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
270 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
272 EVPerr(EVP_F_FIPS_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
279 int FIPS_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
280 const unsigned char *in, unsigned int inl)
282 FIPS_selftest_check();
283 return ctx->cipher->do_cipher(ctx,out,in,inl);