155714Skris/* crypto/evp/evp_lib.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/evp.h> 6255714Skris#include <openssl/objects.h> 6355714Skris 6455714Skrisint EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 6555714Skris { 6655714Skris int ret; 6755714Skris 6855714Skris if (c->cipher->set_asn1_parameters != NULL) 6955714Skris ret=c->cipher->set_asn1_parameters(c,type); 70194206Ssimon else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) 71194206Ssimon ret=EVP_CIPHER_set_asn1_iv(c, type); 7255714Skris else 73160814Ssimon ret=-1; 7455714Skris return(ret); 7555714Skris } 7655714Skris 7755714Skrisint EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 7855714Skris { 7955714Skris int ret; 8055714Skris 8155714Skris if (c->cipher->get_asn1_parameters != NULL) 8255714Skris ret=c->cipher->get_asn1_parameters(c,type); 83194206Ssimon else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) 84194206Ssimon ret=EVP_CIPHER_get_asn1_iv(c, type); 8555714Skris else 86160814Ssimon ret=-1; 8755714Skris return(ret); 8855714Skris } 8955714Skris 9055714Skrisint EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 9155714Skris { 92160814Ssimon int i=0; 93160814Ssimon unsigned int l; 9455714Skris 9555714Skris if (type != NULL) 9655714Skris { 9755714Skris l=EVP_CIPHER_CTX_iv_length(c); 98160814Ssimon OPENSSL_assert(l <= sizeof(c->iv)); 9955714Skris i=ASN1_TYPE_get_octetstring(type,c->oiv,l); 100160814Ssimon if (i != (int)l) 10155714Skris return(-1); 10255714Skris else if (i > 0) 10355714Skris memcpy(c->iv,c->oiv,l); 10455714Skris } 10555714Skris return(i); 10655714Skris } 10755714Skris 10855714Skrisint EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 10955714Skris { 110160814Ssimon int i=0; 111160814Ssimon unsigned int j; 11255714Skris 11355714Skris if (type != NULL) 11455714Skris { 11555714Skris j=EVP_CIPHER_CTX_iv_length(c); 116160814Ssimon OPENSSL_assert(j <= sizeof(c->iv)); 11755714Skris i=ASN1_TYPE_set_octetstring(type,c->oiv,j); 11855714Skris } 11955714Skris return(i); 12055714Skris } 12155714Skris 12255714Skris/* Convert the various cipher NIDs and dummies to a proper OID NID */ 12355714Skrisint EVP_CIPHER_type(const EVP_CIPHER *ctx) 12455714Skris{ 12555714Skris int nid; 12659191Skris ASN1_OBJECT *otmp; 12755714Skris nid = EVP_CIPHER_nid(ctx); 12855714Skris 12955714Skris switch(nid) { 13055714Skris 13155714Skris case NID_rc2_cbc: 13255714Skris case NID_rc2_64_cbc: 13355714Skris case NID_rc2_40_cbc: 13455714Skris 13555714Skris return NID_rc2_cbc; 13655714Skris 13755714Skris case NID_rc4: 13855714Skris case NID_rc4_40: 13955714Skris 14055714Skris return NID_rc4; 14155714Skris 142142425Snectar case NID_aes_128_cfb128: 143142425Snectar case NID_aes_128_cfb8: 144142425Snectar case NID_aes_128_cfb1: 145142425Snectar 146142425Snectar return NID_aes_128_cfb128; 147142425Snectar 148142425Snectar case NID_aes_192_cfb128: 149142425Snectar case NID_aes_192_cfb8: 150142425Snectar case NID_aes_192_cfb1: 151142425Snectar 152142425Snectar return NID_aes_192_cfb128; 153142425Snectar 154142425Snectar case NID_aes_256_cfb128: 155142425Snectar case NID_aes_256_cfb8: 156142425Snectar case NID_aes_256_cfb1: 157142425Snectar 158142425Snectar return NID_aes_256_cfb128; 159142425Snectar 160142425Snectar case NID_des_cfb64: 161142425Snectar case NID_des_cfb8: 162142425Snectar case NID_des_cfb1: 163142425Snectar 164142425Snectar return NID_des_cfb64; 165142425Snectar 166205128Ssimon case NID_des_ede3_cfb64: 167205128Ssimon case NID_des_ede3_cfb8: 168205128Ssimon case NID_des_ede3_cfb1: 169205128Ssimon 170205128Ssimon return NID_des_cfb64; 171205128Ssimon 17255714Skris default: 17359191Skris /* Check it has an OID and it is valid */ 17459191Skris otmp = OBJ_nid2obj(nid); 17559191Skris if(!otmp || !otmp->data) nid = NID_undef; 17659191Skris ASN1_OBJECT_free(otmp); 17755714Skris return nid; 17855714Skris } 17955714Skris} 18055714Skris 181167612Ssimonint EVP_CIPHER_block_size(const EVP_CIPHER *e) 182167612Ssimon { 183167612Ssimon return e->block_size; 184167612Ssimon } 185167612Ssimon 186167612Ssimonint EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) 187167612Ssimon { 188167612Ssimon return ctx->cipher->block_size; 189167612Ssimon } 190167612Ssimon 191238405Sjkimint EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) 192238405Sjkim { 193238405Sjkim return ctx->cipher->do_cipher(ctx,out,in,inl); 194238405Sjkim } 195238405Sjkim 196167612Ssimonconst EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) 197167612Ssimon { 198167612Ssimon return ctx->cipher; 199167612Ssimon } 200167612Ssimon 201167612Ssimonunsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) 202167612Ssimon { 203167612Ssimon return cipher->flags; 204167612Ssimon } 205167612Ssimon 206238405Sjkimunsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx) 207238405Sjkim { 208238405Sjkim return ctx->cipher->flags; 209238405Sjkim } 210238405Sjkim 211167612Ssimonvoid *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) 212167612Ssimon { 213167612Ssimon return ctx->app_data; 214167612Ssimon } 215167612Ssimon 216167612Ssimonvoid EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) 217167612Ssimon { 218167612Ssimon ctx->app_data = data; 219167612Ssimon } 220167612Ssimon 221167612Ssimonint EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) 222167612Ssimon { 223167612Ssimon return cipher->iv_len; 224167612Ssimon } 225167612Ssimon 226238405Sjkimint EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) 227238405Sjkim { 228238405Sjkim return ctx->cipher->iv_len; 229238405Sjkim } 230238405Sjkim 231167612Ssimonint EVP_CIPHER_key_length(const EVP_CIPHER *cipher) 232167612Ssimon { 233167612Ssimon return cipher->key_len; 234167612Ssimon } 235167612Ssimon 236167612Ssimonint EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) 237167612Ssimon { 238167617Ssimon return ctx->key_len; 239167612Ssimon } 240167612Ssimon 241238405Sjkimint EVP_CIPHER_nid(const EVP_CIPHER *cipher) 242238405Sjkim { 243238405Sjkim return cipher->nid; 244238405Sjkim } 245238405Sjkim 246167612Ssimonint EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) 247167612Ssimon { 248167612Ssimon return ctx->cipher->nid; 249167612Ssimon } 250167612Ssimon 251167612Ssimonint EVP_MD_block_size(const EVP_MD *md) 252167612Ssimon { 253167612Ssimon return md->block_size; 254167612Ssimon } 255167612Ssimon 256167612Ssimonint EVP_MD_type(const EVP_MD *md) 257167612Ssimon { 258167612Ssimon return md->type; 259167612Ssimon } 260167612Ssimon 261167612Ssimonint EVP_MD_pkey_type(const EVP_MD *md) 262167612Ssimon { 263167612Ssimon return md->pkey_type; 264167612Ssimon } 265167612Ssimon 266167612Ssimonint EVP_MD_size(const EVP_MD *md) 267167612Ssimon { 268238405Sjkim if (!md) 269238405Sjkim { 270238405Sjkim EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); 271238405Sjkim return -1; 272238405Sjkim } 273167612Ssimon return md->md_size; 274167612Ssimon } 275167612Ssimon 276238405Sjkimunsigned long EVP_MD_flags(const EVP_MD *md) 277167612Ssimon { 278238405Sjkim return md->flags; 279238405Sjkim } 280238405Sjkim 281238405Sjkimconst EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) 282238405Sjkim { 283238405Sjkim if (!ctx) 284238405Sjkim return NULL; 285167612Ssimon return ctx->digest; 286167612Ssimon } 287167612Ssimon 288167612Ssimonvoid EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) 289167612Ssimon { 290167612Ssimon ctx->flags |= flags; 291167612Ssimon } 292167612Ssimon 293167612Ssimonvoid EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) 294167612Ssimon { 295167612Ssimon ctx->flags &= ~flags; 296167612Ssimon } 297167612Ssimon 298167612Ssimonint EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) 299167612Ssimon { 300167612Ssimon return (ctx->flags & flags); 301167612Ssimon } 302194206Ssimon 303194206Ssimonvoid EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) 304194206Ssimon { 305194206Ssimon ctx->flags |= flags; 306194206Ssimon } 307194206Ssimon 308194206Ssimonvoid EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) 309194206Ssimon { 310194206Ssimon ctx->flags &= ~flags; 311194206Ssimon } 312194206Ssimon 313194206Ssimonint EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) 314194206Ssimon { 315194206Ssimon return (ctx->flags & flags); 316194206Ssimon } 317