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-rw-r--r--openssl/engines/ccgost/gost_crypt.c614
1 files changed, 614 insertions, 0 deletions
diff --git a/openssl/engines/ccgost/gost_crypt.c b/openssl/engines/ccgost/gost_crypt.c
new file mode 100644
index 000000000..eb11f0e32
--- /dev/null
+++ b/openssl/engines/ccgost/gost_crypt.c
@@ -0,0 +1,614 @@
+/**********************************************************************
+ * 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,j);
+ 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 = params->value.sequence->data;
+ struct ossl_gost_cipher_ctx *c=ctx->cipher_data;
+ if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE)
+ {
+ return ret;
+ }
+
+ 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,0,16);
+ 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;
+ }
+
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