From 3e121542d8b7ab5201c47bbd3ba5611a23c54759 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Parm=C3=A9nides=20GV?= Date: Wed, 11 Jun 2014 11:56:59 +0200 Subject: Correctly connects to millipede. Location keyword on android.cfg isn't supported, EIP corresponding code has been commented out. I think we should support it in ics-openvpn, so that we can show the location instead of the server name. I've updated all opensssl, openvpn, etc. subprojects from rev 813 of ics-openvpn, and jni too. --- app/openssl/crypto/srp/srp_vfy.c | 658 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 658 insertions(+) create mode 100644 app/openssl/crypto/srp/srp_vfy.c (limited to 'app/openssl/crypto/srp/srp_vfy.c') diff --git a/app/openssl/crypto/srp/srp_vfy.c b/app/openssl/crypto/srp/srp_vfy.c new file mode 100644 index 00000000..4a3d13ed --- /dev/null +++ b/app/openssl/crypto/srp/srp_vfy.c @@ -0,0 +1,658 @@ +/* crypto/srp/srp_vfy.c */ +/* Written by Christophe Renou (christophe.renou@edelweb.fr) with + * the precious help of Peter Sylvester (peter.sylvester@edelweb.fr) + * for the EdelKey project and contributed to the OpenSSL project 2004. + */ +/* ==================================================================== + * Copyright (c) 2004 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +#ifndef OPENSSL_NO_SRP +#include "cryptlib.h" +#include "srp_lcl.h" +#include +#include +#include +#include +#include + +#define SRP_RANDOM_SALT_LEN 20 +#define MAX_LEN 2500 + +static char b64table[] = + "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./"; + +/* the following two conversion routines have been inspired by code from Stanford */ + +/* + * Convert a base64 string into raw byte array representation. + */ +static int t_fromb64(unsigned char *a, const char *src) + { + char *loc; + int i, j; + int size; + + while(*src && (*src == ' ' || *src == '\t' || *src == '\n')) + ++src; + size = strlen(src); + i = 0; + while(i < size) + { + loc = strchr(b64table, src[i]); + if(loc == (char *) 0) break; + else a[i] = loc - b64table; + ++i; + } + size = i; + i = size - 1; + j = size; + while(1) + { + a[j] = a[i]; + if(--i < 0) break; + a[j] |= (a[i] & 3) << 6; + --j; + a[j] = (unsigned char) ((a[i] & 0x3c) >> 2); + if(--i < 0) break; + a[j] |= (a[i] & 0xf) << 4; + --j; + a[j] = (unsigned char) ((a[i] & 0x30) >> 4); + if(--i < 0) break; + a[j] |= (a[i] << 2); + + a[--j] = 0; + if(--i < 0) break; + } + while(a[j] == 0 && j <= size) ++j; + i = 0; + while (j <= size) a[i++] = a[j++]; + return i; + } + + +/* + * Convert a raw byte string into a null-terminated base64 ASCII string. + */ +static char *t_tob64(char *dst, const unsigned char *src, int size) + { + int c, pos = size % 3; + unsigned char b0 = 0, b1 = 0, b2 = 0, notleading = 0; + char *olddst = dst; + + switch(pos) + { + case 1: + b2 = src[0]; + break; + case 2: + b1 = src[0]; + b2 = src[1]; + break; + } + + while(1) + { + c = (b0 & 0xfc) >> 2; + if(notleading || c != 0) + { + *dst++ = b64table[c]; + notleading = 1; + } + c = ((b0 & 3) << 4) | ((b1 & 0xf0) >> 4); + if(notleading || c != 0) + { + *dst++ = b64table[c]; + notleading = 1; + } + c = ((b1 & 0xf) << 2) | ((b2 & 0xc0) >> 6); + if(notleading || c != 0) + { + *dst++ = b64table[c]; + notleading = 1; + } + c = b2 & 0x3f; + if(notleading || c != 0) + { + *dst++ = b64table[c]; + notleading = 1; + } + if(pos >= size) break; + else + { + b0 = src[pos++]; + b1 = src[pos++]; + b2 = src[pos++]; + } + } + + *dst++ = '\0'; + return olddst; + } + +static void SRP_user_pwd_free(SRP_user_pwd *user_pwd) + { + if (user_pwd == NULL) + return; + BN_free(user_pwd->s); + BN_clear_free(user_pwd->v); + OPENSSL_free(user_pwd->id); + OPENSSL_free(user_pwd->info); + OPENSSL_free(user_pwd); + } + +static SRP_user_pwd *SRP_user_pwd_new() + { + SRP_user_pwd *ret = OPENSSL_malloc(sizeof(SRP_user_pwd)); + if (ret == NULL) + return NULL; + ret->N = NULL; + ret->g = NULL; + ret->s = NULL; + ret->v = NULL; + ret->id = NULL ; + ret->info = NULL; + return ret; + } + +static void SRP_user_pwd_set_gN(SRP_user_pwd *vinfo, const BIGNUM *g, + const BIGNUM *N) + { + vinfo->N = N; + vinfo->g = g; + } + +static int SRP_user_pwd_set_ids(SRP_user_pwd *vinfo, const char *id, + const char *info) + { + if (id != NULL && NULL == (vinfo->id = BUF_strdup(id))) + return 0; + return (info == NULL || NULL != (vinfo->info = BUF_strdup(info))) ; + } + +static int SRP_user_pwd_set_sv(SRP_user_pwd *vinfo, const char *s, + const char *v) + { + unsigned char tmp[MAX_LEN]; + int len; + + if (strlen(s) > MAX_LEN || strlen(v) > MAX_LEN) + return 0; + len = t_fromb64(tmp, v); + if (NULL == (vinfo->v = BN_bin2bn(tmp, len, NULL)) ) + return 0; + len = t_fromb64(tmp, s); + return ((vinfo->s = BN_bin2bn(tmp, len, NULL)) != NULL) ; + } + +static int SRP_user_pwd_set_sv_BN(SRP_user_pwd *vinfo, BIGNUM *s, BIGNUM *v) + { + vinfo->v = v; + vinfo->s = s; + return (vinfo->s != NULL && vinfo->v != NULL) ; + } + +SRP_VBASE *SRP_VBASE_new(char *seed_key) + { + SRP_VBASE *vb = (SRP_VBASE *) OPENSSL_malloc(sizeof(SRP_VBASE)); + + if (vb == NULL) + return NULL; + if (!(vb->users_pwd = sk_SRP_user_pwd_new_null()) || + !(vb->gN_cache = sk_SRP_gN_cache_new_null())) + { + OPENSSL_free(vb); + return NULL; + } + vb->default_g = NULL; + vb->default_N = NULL; + vb->seed_key = NULL; + if ((seed_key != NULL) && + (vb->seed_key = BUF_strdup(seed_key)) == NULL) + { + sk_SRP_user_pwd_free(vb->users_pwd); + sk_SRP_gN_cache_free(vb->gN_cache); + OPENSSL_free(vb); + return NULL; + } + return vb; + } + + +int SRP_VBASE_free(SRP_VBASE *vb) + { + sk_SRP_user_pwd_pop_free(vb->users_pwd,SRP_user_pwd_free); + sk_SRP_gN_cache_free(vb->gN_cache); + OPENSSL_free(vb->seed_key); + OPENSSL_free(vb); + return 0; + } + + +static SRP_gN_cache *SRP_gN_new_init(const char *ch) + { + unsigned char tmp[MAX_LEN]; + int len; + + SRP_gN_cache *newgN = (SRP_gN_cache *)OPENSSL_malloc(sizeof(SRP_gN_cache)); + if (newgN == NULL) + return NULL; + + if ((newgN->b64_bn = BUF_strdup(ch)) == NULL) + goto err; + + len = t_fromb64(tmp, ch); + if ((newgN->bn = BN_bin2bn(tmp, len, NULL))) + return newgN; + + OPENSSL_free(newgN->b64_bn); +err: + OPENSSL_free(newgN); + return NULL; + } + + +static void SRP_gN_free(SRP_gN_cache *gN_cache) + { + if (gN_cache == NULL) + return; + OPENSSL_free(gN_cache->b64_bn); + BN_free(gN_cache->bn); + OPENSSL_free(gN_cache); + } + +static SRP_gN *SRP_get_gN_by_id(const char *id, STACK_OF(SRP_gN) *gN_tab) + { + int i; + + SRP_gN *gN; + if (gN_tab != NULL) + for(i = 0; i < sk_SRP_gN_num(gN_tab); i++) + { + gN = sk_SRP_gN_value(gN_tab, i); + if (gN && (id == NULL || strcmp(gN->id,id)==0)) + return gN; + } + + return SRP_get_default_gN(id); + } + +static BIGNUM *SRP_gN_place_bn(STACK_OF(SRP_gN_cache) *gN_cache, char *ch) + { + int i; + if (gN_cache == NULL) + return NULL; + + /* search if we have already one... */ + for(i = 0; i < sk_SRP_gN_cache_num(gN_cache); i++) + { + SRP_gN_cache *cache = sk_SRP_gN_cache_value(gN_cache, i); + if (strcmp(cache->b64_bn,ch)==0) + return cache->bn; + } + { /* it is the first time that we find it */ + SRP_gN_cache *newgN = SRP_gN_new_init(ch); + if (newgN) + { + if (sk_SRP_gN_cache_insert(gN_cache,newgN,0)>0) + return newgN->bn; + SRP_gN_free(newgN); + } + } + return NULL; + } + +/* this function parses verifier file. Format is: + * string(index):base64(N):base64(g):0 + * string(username):base64(v):base64(salt):int(index) + */ + + +int SRP_VBASE_init(SRP_VBASE *vb, char *verifier_file) + { + int error_code ; + STACK_OF(SRP_gN) *SRP_gN_tab = sk_SRP_gN_new_null(); + char *last_index = NULL; + int i; + char **pp; + + SRP_gN *gN = NULL; + SRP_user_pwd *user_pwd = NULL ; + + TXT_DB *tmpdb = NULL; + BIO *in = BIO_new(BIO_s_file()); + + error_code = SRP_ERR_OPEN_FILE; + + if (in == NULL || BIO_read_filename(in,verifier_file) <= 0) + goto err; + + error_code = SRP_ERR_VBASE_INCOMPLETE_FILE; + + if ((tmpdb =TXT_DB_read(in,DB_NUMBER)) == NULL) + goto err; + + error_code = SRP_ERR_MEMORY; + + + if (vb->seed_key) + { + last_index = SRP_get_default_gN(NULL)->id; + } + for (i = 0; i < sk_OPENSSL_PSTRING_num(tmpdb->data); i++) + { + pp = sk_OPENSSL_PSTRING_value(tmpdb->data,i); + if (pp[DB_srptype][0] == DB_SRP_INDEX) + { + /*we add this couple in the internal Stack */ + + if ((gN = (SRP_gN *)OPENSSL_malloc(sizeof(SRP_gN))) == NULL) + goto err; + + if (!(gN->id = BUF_strdup(pp[DB_srpid])) + || !(gN->N = SRP_gN_place_bn(vb->gN_cache,pp[DB_srpverifier])) + || !(gN->g = SRP_gN_place_bn(vb->gN_cache,pp[DB_srpsalt])) + || sk_SRP_gN_insert(SRP_gN_tab,gN,0) == 0) + goto err; + + gN = NULL; + + if (vb->seed_key != NULL) + { + last_index = pp[DB_srpid]; + } + } + else if (pp[DB_srptype][0] == DB_SRP_VALID) + { + /* it is a user .... */ + SRP_gN *lgN; + if ((lgN = SRP_get_gN_by_id(pp[DB_srpgN],SRP_gN_tab))!=NULL) + { + error_code = SRP_ERR_MEMORY; + if ((user_pwd = SRP_user_pwd_new()) == NULL) + goto err; + + SRP_user_pwd_set_gN(user_pwd,lgN->g,lgN->N); + if (!SRP_user_pwd_set_ids(user_pwd, pp[DB_srpid],pp[DB_srpinfo])) + goto err; + + error_code = SRP_ERR_VBASE_BN_LIB; + if (!SRP_user_pwd_set_sv(user_pwd, pp[DB_srpsalt],pp[DB_srpverifier])) + goto err; + + if (sk_SRP_user_pwd_insert(vb->users_pwd, user_pwd, 0) == 0) + goto err; + user_pwd = NULL; /* abandon responsability */ + } + } + } + + if (last_index != NULL) + { + /* this means that we want to simulate a default user */ + + if (((gN = SRP_get_gN_by_id(last_index,SRP_gN_tab))==NULL)) + { + error_code = SRP_ERR_VBASE_BN_LIB; + goto err; + } + vb->default_g = gN->g ; + vb->default_N = gN->N ; + gN = NULL ; + } + error_code = SRP_NO_ERROR; + + err: + /* there may be still some leaks to fix, if this fails, the application terminates most likely */ + + if (gN != NULL) + { + OPENSSL_free(gN->id); + OPENSSL_free(gN); + } + + SRP_user_pwd_free(user_pwd); + + if (tmpdb) TXT_DB_free(tmpdb); + if (in) BIO_free_all(in); + + sk_SRP_gN_free(SRP_gN_tab); + + return error_code; + + } + + +SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username) + { + int i; + SRP_user_pwd *user; + unsigned char digv[SHA_DIGEST_LENGTH]; + unsigned char digs[SHA_DIGEST_LENGTH]; + EVP_MD_CTX ctxt; + + if (vb == NULL) + return NULL; + for(i = 0; i < sk_SRP_user_pwd_num(vb->users_pwd); i++) + { + user = sk_SRP_user_pwd_value(vb->users_pwd, i); + if (strcmp(user->id,username)==0) + return user; + } + if ((vb->seed_key == NULL) || + (vb->default_g == NULL) || + (vb->default_N == NULL)) + return NULL; + +/* if the user is unknown we set parameters as well if we have a seed_key */ + + if ((user = SRP_user_pwd_new()) == NULL) + return NULL; + + SRP_user_pwd_set_gN(user,vb->default_g,vb->default_N); + + if (!SRP_user_pwd_set_ids(user,username,NULL)) + goto err; + + RAND_pseudo_bytes(digv, SHA_DIGEST_LENGTH); + EVP_MD_CTX_init(&ctxt); + EVP_DigestInit_ex(&ctxt, EVP_sha1(), NULL); + EVP_DigestUpdate(&ctxt, vb->seed_key, strlen(vb->seed_key)); + EVP_DigestUpdate(&ctxt, username, strlen(username)); + EVP_DigestFinal_ex(&ctxt, digs, NULL); + EVP_MD_CTX_cleanup(&ctxt); + if (SRP_user_pwd_set_sv_BN(user, BN_bin2bn(digs,SHA_DIGEST_LENGTH,NULL), BN_bin2bn(digv,SHA_DIGEST_LENGTH, NULL))) + return user; + +err: SRP_user_pwd_free(user); + return NULL; + } + + +/* + create a verifier (*salt,*verifier,g and N are in base64) +*/ +char *SRP_create_verifier(const char *user, const char *pass, char **salt, + char **verifier, const char *N, const char *g) + { + int len; + char * result=NULL; + char *vf; + BIGNUM *N_bn = NULL, *g_bn = NULL, *s = NULL, *v = NULL; + unsigned char tmp[MAX_LEN]; + unsigned char tmp2[MAX_LEN]; + char * defgNid = NULL; + + if ((user == NULL)|| + (pass == NULL)|| + (salt == NULL)|| + (verifier == NULL)) + goto err; + + if (N) + { + if (!(len = t_fromb64(tmp, N))) goto err; + N_bn = BN_bin2bn(tmp, len, NULL); + if (!(len = t_fromb64(tmp, g))) goto err; + g_bn = BN_bin2bn(tmp, len, NULL); + defgNid = "*"; + } + else + { + SRP_gN * gN = SRP_get_gN_by_id(g, NULL) ; + if (gN == NULL) + goto err; + N_bn = gN->N; + g_bn = gN->g; + defgNid = gN->id; + } + + if (*salt == NULL) + { + RAND_pseudo_bytes(tmp2, SRP_RANDOM_SALT_LEN); + + s = BN_bin2bn(tmp2, SRP_RANDOM_SALT_LEN, NULL); + } + else + { + if (!(len = t_fromb64(tmp2, *salt))) + goto err; + s = BN_bin2bn(tmp2, len, NULL); + } + + + if(!SRP_create_verifier_BN(user, pass, &s, &v, N_bn, g_bn)) goto err; + + BN_bn2bin(v,tmp); + if (((vf = OPENSSL_malloc(BN_num_bytes(v)*2)) == NULL)) + goto err; + t_tob64(vf, tmp, BN_num_bytes(v)); + + *verifier = vf; + if (*salt == NULL) + { + char *tmp_salt; + + if ((tmp_salt = OPENSSL_malloc(SRP_RANDOM_SALT_LEN * 2)) == NULL) + { + OPENSSL_free(vf); + goto err; + } + t_tob64(tmp_salt, tmp2, SRP_RANDOM_SALT_LEN); + *salt = tmp_salt; + } + + result=defgNid; + +err: + if(N) + { + BN_free(N_bn); + BN_free(g_bn); + } + return result; + } + +/* + create a verifier (*salt,*verifier,g and N are BIGNUMs) +*/ +int SRP_create_verifier_BN(const char *user, const char *pass, BIGNUM **salt, BIGNUM **verifier, BIGNUM *N, BIGNUM *g) + { + int result=0; + BIGNUM *x = NULL; + BN_CTX *bn_ctx = BN_CTX_new(); + unsigned char tmp2[MAX_LEN]; + + if ((user == NULL)|| + (pass == NULL)|| + (salt == NULL)|| + (verifier == NULL)|| + (N == NULL)|| + (g == NULL)|| + (bn_ctx == NULL)) + goto err; + + srp_bn_print(N); + srp_bn_print(g); + + if (*salt == NULL) + { + RAND_pseudo_bytes(tmp2, SRP_RANDOM_SALT_LEN); + + *salt = BN_bin2bn(tmp2,SRP_RANDOM_SALT_LEN,NULL); + } + + x = SRP_Calc_x(*salt,user,pass); + + *verifier = BN_new(); + if(*verifier == NULL) goto err; + + if (!BN_mod_exp(*verifier,g,x,N,bn_ctx)) + { + BN_clear_free(*verifier); + goto err; + } + + srp_bn_print(*verifier); + + result=1; + +err: + + BN_clear_free(x); + BN_CTX_free(bn_ctx); + return result; + } + + + +#endif -- cgit v1.2.3