diff options
Diffstat (limited to 'deps/openssl/openssl/engines/ccgost/gost_crypt.c')
| -rw-r--r-- | deps/openssl/openssl/engines/ccgost/gost_crypt.c | 617 |
1 files changed, 617 insertions, 0 deletions
diff --git a/deps/openssl/openssl/engines/ccgost/gost_crypt.c b/deps/openssl/openssl/engines/ccgost/gost_crypt.c new file mode 100644 index 0000000000..cde58c0e9b --- /dev/null +++ b/deps/openssl/openssl/engines/ccgost/gost_crypt.c @@ -0,0 +1,617 @@ +/********************************************************************** + * gost_crypt.c * + * Copyright (c) 2005-2006 Cryptocom LTD * + * This file is distributed under the same license as OpenSSL * + * * + * OpenSSL interface to GOST 28147-89 cipher functions * + * Requires OpenSSL 0.9.9 for compilation * + **********************************************************************/ +#include <string.h> +#include "gost89.h" +#include <openssl/rand.h> +#include "e_gost_err.h" +#include "gost_lcl.h" +static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); +static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); +/* Handles block of data in CFB mode */ +static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl); +/* Handles block of data in CNT mode */ +static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl); +/* Cleanup function */ +static int gost_cipher_cleanup(EVP_CIPHER_CTX *); +/* set/get cipher parameters */ +static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx,ASN1_TYPE *params); +static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx,ASN1_TYPE *params); +/* Control function */ +static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx,int type,int arg,void *ptr); + +EVP_CIPHER cipher_gost = + { + NID_id_Gost28147_89, + 1,/*block_size*/ + 32,/*key_size*/ + 8,/*iv_len */ + EVP_CIPH_CFB_MODE| EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV| EVP_CIPH_RAND_KEY | EVP_CIPH_ALWAYS_CALL_INIT, + gost_cipher_init, + gost_cipher_do_cfb, + gost_cipher_cleanup, + sizeof(struct ossl_gost_cipher_ctx),/* ctx_size */ + gost89_set_asn1_parameters, + gost89_get_asn1_parameters, + gost_cipher_ctl, + NULL, + }; + +EVP_CIPHER cipher_gost_cpacnt = + { + NID_gost89_cnt, + 1,/*block_size*/ + 32,/*key_size*/ + 8,/*iv_len */ + EVP_CIPH_OFB_MODE| EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV| EVP_CIPH_RAND_KEY | EVP_CIPH_ALWAYS_CALL_INIT, + gost_cipher_init_cpa, + gost_cipher_do_cnt, + gost_cipher_cleanup, + sizeof(struct ossl_gost_cipher_ctx), /* ctx_size */ + gost89_set_asn1_parameters, + gost89_get_asn1_parameters, + gost_cipher_ctl, + NULL, + }; + +/* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */ +/* Init functions which set specific parameters */ +static int gost_imit_init_cpa(EVP_MD_CTX *ctx); +/* process block of data */ +static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count); +/* Return computed value */ +static int gost_imit_final(EVP_MD_CTX *ctx,unsigned char *md); +/* Copies context */ +static int gost_imit_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from); +static int gost_imit_cleanup(EVP_MD_CTX *ctx); +/* Control function, knows how to set MAC key.*/ +static int gost_imit_ctrl(EVP_MD_CTX *ctx,int type, int arg, void *ptr); + +EVP_MD imit_gost_cpa = + { + NID_id_Gost28147_89_MAC, + NID_undef, + 4, + 0, + gost_imit_init_cpa, + gost_imit_update, + gost_imit_final, + gost_imit_copy, + gost_imit_cleanup, + NULL, + NULL, + {0,0,0,0,0}, + 8, + sizeof(struct ossl_gost_imit_ctx), + gost_imit_ctrl + }; + +/* + * Correspondence between gost parameter OIDs and substitution blocks + * NID field is filed by register_gost_NID function in engine.c + * upon engine initialization + */ + +struct gost_cipher_info gost_cipher_list[]= + { +/* NID */ /* Subst block */ /* Key meshing*/ +/*{NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},*/ + {NID_id_Gost28147_89_cc,&GostR3411_94_CryptoProParamSet,0}, + {NID_id_Gost28147_89_CryptoPro_A_ParamSet,&Gost28147_CryptoProParamSetA,1}, + {NID_id_Gost28147_89_CryptoPro_B_ParamSet,&Gost28147_CryptoProParamSetB,1}, + {NID_id_Gost28147_89_CryptoPro_C_ParamSet,&Gost28147_CryptoProParamSetC,1}, + {NID_id_Gost28147_89_CryptoPro_D_ParamSet,&Gost28147_CryptoProParamSetD,1}, + {NID_id_Gost28147_89_TestParamSet,&Gost28147_TestParamSet,1}, + {NID_undef,NULL,0} + }; + +/* get encryption parameters from crypto network settings + FIXME For now we use environment var CRYPT_PARAMS as place to + store these settings. Actually, it is better to use engine control command, read from configuration file to set them */ +const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj) + { + int nid; + struct gost_cipher_info *param; + if (!obj) + { + const char * params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS); + if (!params || !strlen(params)) + return &gost_cipher_list[1]; + + nid = OBJ_txt2nid(params); + if (nid == NID_undef) + { + GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, + GOST_R_INVALID_CIPHER_PARAM_OID); + return NULL; + } + } + else + { + nid= OBJ_obj2nid(obj); + } + for (param=gost_cipher_list;param->sblock!=NULL && param->nid!=nid; + param++); + if (!param->sblock) + { + GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,GOST_R_INVALID_CIPHER_PARAMS); + return NULL; + } + return param; + } + +/* Sets cipher param from paramset NID. */ +static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c,int nid) + { + const struct gost_cipher_info *param; + param=get_encryption_params((nid==NID_undef?NULL:OBJ_nid2obj(nid))); + if (!param) return 0; + + c->paramNID = param->nid; + c->key_meshing=param->key_meshing; + c->count=0; + gost_init(&(c->cctx), param->sblock); + return 1; + } + +/* Initializes EVP_CIPHER_CTX by paramset NID */ +static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc, int paramNID,int mode) + { + struct ossl_gost_cipher_ctx *c=ctx->cipher_data; + if (ctx->app_data == NULL) + { + if (!gost_cipher_set_param(c,paramNID)) return 0; + ctx->app_data = ctx->cipher_data; + } + if (key) gost_key(&(c->cctx),key); + if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); + memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); + return 1; + } + +static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + struct ossl_gost_cipher_ctx *c=ctx->cipher_data; + gost_init(&(c->cctx),&Gost28147_CryptoProParamSetA); + c->key_meshing=1; + c->count=0; + if(key) gost_key(&(c->cctx),key); + if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); + memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); + return 1; + } + +/* Initializes EVP_CIPHER_CTX with default values */ +int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + return gost_cipher_init_param(ctx,key,iv,enc,NID_undef,EVP_CIPH_CFB_MODE); + } +/* Wrapper around gostcrypt function from gost89.c which perform + * key meshing when nesseccary + */ +static void gost_crypt_mesh (void *ctx,unsigned char *iv,unsigned char *buf) + { + struct ossl_gost_cipher_ctx *c = ctx; + if (c->count&&c->key_meshing && c->count%1024==0) + { + cryptopro_key_meshing(&(c->cctx),iv); + } + gostcrypt(&(c->cctx),iv,buf); + c->count+=8; + } + +static void gost_cnt_next (void *ctx, unsigned char *iv, unsigned char *buf) + { + struct ossl_gost_cipher_ctx *c = ctx; + word32 g,go; + unsigned char buf1[8]; + if (c->count && c->key_meshing && c->count %1024 ==0) + { + cryptopro_key_meshing(&(c->cctx),iv); + } + if (c->count==0) + { + gostcrypt(&(c->cctx),iv,buf1); + } + else + { + memcpy(buf1,iv,8); + } + g = buf1[0]|(buf1[1]<<8)|(buf1[2]<<16)|(buf1[3]<<24); + g += 0x01010101; + buf1[0]=(unsigned char)(g&0xff); + buf1[1]=(unsigned char)((g>>8)&0xff); + buf1[2]=(unsigned char)((g>>16)&0xff); + buf1[3]=(unsigned char)((g>>24)&0xff); + g = buf1[4]|(buf1[5]<<8)|(buf1[6]<<16)|(buf1[7]<<24); + go = g; + g += 0x01010104; + if (go > g) /* overflow*/ + g++; + buf1[4]=(unsigned char)(g&0xff); + buf1[5]=(unsigned char)((g>>8)&0xff); + buf1[6]=(unsigned char)((g>>16)&0xff); + buf1[7]=(unsigned char)((g>>24)&0xff); + memcpy(iv,buf1,8); + gostcrypt(&(c->cctx),buf1,buf); + c->count +=8; + } + +/* GOST encryption in CFB mode */ +int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) + { + const unsigned char *in_ptr=in; + unsigned char *out_ptr=out; + size_t i=0; + size_t j=0; +/* process partial block if any */ + if (ctx->num) + { + for (j=ctx->num,i=0;j<8 && i<inl;j++,i++,in_ptr++,out_ptr++) + { + if (!ctx->encrypt) ctx->buf[j+8]=*in_ptr; + *out_ptr=ctx->buf[j]^(*in_ptr); + if (ctx->encrypt) ctx->buf[j+8]=*out_ptr; + } + if (j==8) + { + memcpy(ctx->iv,ctx->buf+8,8); + ctx->num=0; + } + else + { + ctx->num=j; + return 1; + } + } + + for (;i+8<inl;i+=8,in_ptr+=8,out_ptr+=8) + { + /*block cipher current iv */ + gost_crypt_mesh(ctx->cipher_data,ctx->iv,ctx->buf); + /*xor next block of input text with it and output it*/ + /*output this block */ + if (!ctx->encrypt) memcpy(ctx->iv,in_ptr,8); + for (j=0;j<8;j++) + { + out_ptr[j]=ctx->buf[j]^in_ptr[j]; + } + /* Encrypt */ + /* Next iv is next block of cipher text*/ + if (ctx->encrypt) memcpy(ctx->iv,out_ptr,8); + } +/* Process rest of buffer */ + if (i<inl) + { + gost_crypt_mesh(ctx->cipher_data,ctx->iv,ctx->buf); + if (!ctx->encrypt) memcpy(ctx->buf+8,in_ptr,inl-i); + for (j=0;i<inl;j++,i++) + { + out_ptr[j]=ctx->buf[j]^in_ptr[j]; + } + ctx->num = j; + if (ctx->encrypt) memcpy(ctx->buf+8,out_ptr,j); + } + else + { + ctx->num = 0; + } + return 1; + } + +static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) + { + const unsigned char *in_ptr=in; + unsigned char *out_ptr=out; + size_t i=0; + size_t j; +/* process partial block if any */ + if (ctx->num) + { + for (j=ctx->num,i=0;j<8 && i<inl;j++,i++,in_ptr++,out_ptr++) + { + *out_ptr=ctx->buf[j]^(*in_ptr); + } + if (j==8) + { + ctx->num=0; + } + else + { + ctx->num=j; + return 1; + } + } + + for (;i+8<inl;i+=8,in_ptr+=8,out_ptr+=8) + { + /*block cipher current iv */ + /* Encrypt */ + gost_cnt_next(ctx->cipher_data,ctx->iv,ctx->buf); + /*xor next block of input text with it and output it*/ + /*output this block */ + for (j=0;j<8;j++) + { + out_ptr[j]=ctx->buf[j]^in_ptr[j]; + } + } +/* Process rest of buffer */ + if (i<inl) + { + gost_cnt_next(ctx->cipher_data,ctx->iv,ctx->buf); + for (j=0;i<inl;j++,i++) + { + out_ptr[j]=ctx->buf[j]^in_ptr[j]; + } + ctx->num = j; + } + else + { + ctx->num = 0; + } + return 1; + } + +/* Cleaning up of EVP_CIPHER_CTX */ +int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx) + { + gost_destroy(&((struct ossl_gost_cipher_ctx *)ctx->cipher_data)->cctx); + ctx->app_data = NULL; + return 1; + } + +/* Control function for gost cipher */ +int gost_cipher_ctl(EVP_CIPHER_CTX *ctx,int type,int arg,void *ptr) + { + switch (type) + { + case EVP_CTRL_RAND_KEY: + { + if (RAND_bytes((unsigned char *)ptr,ctx->key_len)<=0) + { + GOSTerr(GOST_F_GOST_CIPHER_CTL,GOST_R_RANDOM_GENERATOR_ERROR); + return -1; + } + break; + } + case EVP_CTRL_PBE_PRF_NID: + if (ptr) { + *((int *)ptr)= NID_id_HMACGostR3411_94; + return 1; + } else { + return 0; + } + + default: + GOSTerr(GOST_F_GOST_CIPHER_CTL,GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND); + return -1; + } + return 1; + } + +/* Set cipher parameters from ASN1 structure */ +int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx,ASN1_TYPE *params) + { + int len=0; + unsigned char *buf=NULL; + unsigned char *p=NULL; + struct ossl_gost_cipher_ctx *c = ctx->cipher_data; + GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new(); + ASN1_OCTET_STRING *os = NULL; + if (!gcp) + { + GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, GOST_R_NO_MEMORY); + return 0; + } + if (!ASN1_OCTET_STRING_set(gcp->iv, ctx->iv, ctx->cipher->iv_len)) + { + GOST_CIPHER_PARAMS_free(gcp); + GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, GOST_R_NO_MEMORY); + return 0; + } + ASN1_OBJECT_free(gcp->enc_param_set); + gcp->enc_param_set = OBJ_nid2obj(c->paramNID); + + len = i2d_GOST_CIPHER_PARAMS(gcp, NULL); + p = buf = (unsigned char*)OPENSSL_malloc(len); + if (!buf) + { + GOST_CIPHER_PARAMS_free(gcp); + GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, GOST_R_NO_MEMORY); + return 0; + } + i2d_GOST_CIPHER_PARAMS(gcp, &p); + GOST_CIPHER_PARAMS_free(gcp); + + os = ASN1_OCTET_STRING_new(); + + if(!os || !ASN1_OCTET_STRING_set(os, buf, len)) + { + OPENSSL_free(buf); + GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, GOST_R_NO_MEMORY); + return 0; + } + OPENSSL_free(buf); + + ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os); + return 1; + } + +/* Store parameters into ASN1 structure */ +int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx,ASN1_TYPE *params) + { + int ret = -1; + int len; + GOST_CIPHER_PARAMS *gcp = NULL; + unsigned char *p; + struct ossl_gost_cipher_ctx *c=ctx->cipher_data; + if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) + { + return ret; + } + + p = params->value.sequence->data; + + gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p, + params->value.sequence->length); + + len = gcp->iv->length; + if (len != ctx->cipher->iv_len) + { + GOST_CIPHER_PARAMS_free(gcp); + GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, + GOST_R_INVALID_IV_LENGTH); + return -1; + } + if (!gost_cipher_set_param(c,OBJ_obj2nid(gcp->enc_param_set))) + { + GOST_CIPHER_PARAMS_free(gcp); + return -1; + } + memcpy(ctx->oiv, gcp->iv->data, len); + + GOST_CIPHER_PARAMS_free(gcp); + + return 1; + } + + +int gost_imit_init_cpa(EVP_MD_CTX *ctx) + { + struct ossl_gost_imit_ctx *c = ctx->md_data; + memset(c->buffer,0,sizeof(c->buffer)); + memset(c->partial_block,0,sizeof(c->partial_block)); + c->count = 0; + c->bytes_left=0; + c->key_meshing=1; + gost_init(&(c->cctx),&Gost28147_CryptoProParamSetA); + return 1; + } + +static void mac_block_mesh(struct ossl_gost_imit_ctx *c,const unsigned char *data) + { + unsigned char buffer[8]; + /* We are using local buffer for iv because CryptoPro doesn't + * interpret internal state of MAC algorithm as iv during keymeshing + * (but does initialize internal state from iv in key transport + */ + if (c->key_meshing&& c->count && c->count %1024 ==0) + { + cryptopro_key_meshing(&(c->cctx),buffer); + } + mac_block(&(c->cctx),c->buffer,data); + c->count +=8; + } + +int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count) + { + struct ossl_gost_imit_ctx *c = ctx->md_data; + const unsigned char *p = data; + size_t bytes = count,i; + if (!(c->key_set)) { + GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET); + return 0; + } + if (c->bytes_left) + { + for (i=c->bytes_left;i<8&&bytes>0;bytes--,i++,p++) + { + c->partial_block[i]=*p; + } + if (i==8) + { + mac_block_mesh(c,c->partial_block); + } + else + { + c->bytes_left = i; + return 1; + } + } + while (bytes>8) + { + mac_block_mesh(c,p); + p+=8; + bytes-=8; + } + if (bytes>0) + { + memcpy(c->partial_block,p,bytes); + } + c->bytes_left=bytes; + return 1; + } + +int gost_imit_final(EVP_MD_CTX *ctx,unsigned char *md) + { + struct ossl_gost_imit_ctx *c = ctx->md_data; + if (!c->key_set) { + GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET); + return 0; + } + if (c->bytes_left) + { + int i; + for (i=c->bytes_left;i<8;i++) + { + c->partial_block[i]=0; + } + mac_block_mesh(c,c->partial_block); + } + get_mac(c->buffer,32,md); + return 1; + } + +int gost_imit_ctrl(EVP_MD_CTX *ctx,int type, int arg, void *ptr) + { + switch (type) + { + case EVP_MD_CTRL_KEY_LEN: + *((unsigned int*)(ptr)) = 32; + return 1; + case EVP_MD_CTRL_SET_KEY: + { + if (arg!=32) { + GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_LENGTH); + return 0; + } + + gost_key(&(((struct ossl_gost_imit_ctx*)(ctx->md_data))->cctx),ptr) ; + ((struct ossl_gost_imit_ctx*)(ctx->md_data))->key_set = 1; + return 1; + + } + default: + return 0; + } + } + +int gost_imit_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from) + { + memcpy(to->md_data,from->md_data,sizeof(struct ossl_gost_imit_ctx)); + return 1; + } + +/* Clean up imit ctx */ +int gost_imit_cleanup(EVP_MD_CTX *ctx) + { + memset(ctx->md_data,0,sizeof(struct ossl_gost_imit_ctx)); + return 1; + } + |