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 int FIPS_cipherinit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
82 const unsigned char *key, const unsigned char *iv, int enc)
94 /* Ensure a context left lying around from last time is cleared
95 * (the previous check attempted to avoid this if the same
96 * ENGINE and EVP_CIPHER could be used). */
97 FIPS_cipher_ctx_cleanup(ctx);
99 /* Restore encrypt field: it is zeroed by cleanup */
103 if (ctx->cipher->ctx_size)
105 ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
106 if (!ctx->cipher_data)
108 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
114 ctx->cipher_data = NULL;
116 ctx->key_len = cipher->key_len;
118 if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
120 if(!FIPS_cipher_ctx_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
122 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
127 else if(!ctx->cipher)
129 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
132 /* we assume block size is a power of 2 in *cryptUpdate */
133 OPENSSL_assert(ctx->cipher->block_size == 1
134 || ctx->cipher->block_size == 8
135 || ctx->cipher->block_size == 16);
137 if(!(M_EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
138 switch(M_EVP_CIPHER_CTX_mode(ctx)) {
140 case EVP_CIPH_STREAM_CIPHER:
141 case EVP_CIPH_ECB_MODE:
144 case EVP_CIPH_CFB_MODE:
145 case EVP_CIPH_OFB_MODE:
150 case EVP_CIPH_CBC_MODE:
152 OPENSSL_assert(M_EVP_CIPHER_CTX_iv_length(ctx) <=
153 (int)sizeof(ctx->iv));
154 if(iv) memcpy(ctx->oiv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
155 memcpy(ctx->iv, ctx->oiv, M_EVP_CIPHER_CTX_iv_length(ctx));
158 case EVP_CIPH_CTR_MODE:
159 /* Don't reuse IV for CTR mode */
161 memcpy(ctx->iv, iv, M_EVP_CIPHER_CTX_iv_length(ctx));
170 if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
171 if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
175 ctx->block_mask=ctx->cipher->block_size-1;
179 void FIPS_cipher_ctx_free(EVP_CIPHER_CTX *ctx)
183 FIPS_cipher_ctx_cleanup(ctx);
188 int FIPS_cipher_ctx_cleanup(EVP_CIPHER_CTX *c)
190 if (c->cipher != NULL)
192 if(c->cipher->cleanup && !c->cipher->cleanup(c))
194 /* Cleanse cipher context data */
196 OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
199 OPENSSL_free(c->cipher_data);
200 memset(c,0,sizeof(EVP_CIPHER_CTX));
204 int FIPS_cipher_ctx_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
208 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
212 if(!ctx->cipher->ctrl) {
213 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
217 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
219 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
226 int FIPS_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
227 const unsigned char *in, unsigned int inl)
229 return ctx->cipher->do_cipher(ctx,out,in,inl);