155714Skris/* crypto/pem/pem_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. 8296341Sdelphij * 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). 15296341Sdelphij * 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. 22296341Sdelphij * 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 :-). 37296341Sdelphij * 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)" 40296341Sdelphij * 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. 52296341Sdelphij * 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> 60238405Sjkim#include <ctype.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/buffer.h> 6355714Skris#include <openssl/objects.h> 6455714Skris#include <openssl/evp.h> 6555714Skris#include <openssl/rand.h> 6655714Skris#include <openssl/x509.h> 6755714Skris#include <openssl/pem.h> 6855714Skris#include <openssl/pkcs12.h> 69238405Sjkim#include "asn1_locl.h" 70109998Smarkm#ifndef OPENSSL_NO_DES 71296341Sdelphij# include <openssl/des.h> 7255714Skris#endif 73238405Sjkim#ifndef OPENSSL_NO_ENGINE 74296341Sdelphij# include <openssl/engine.h> 75238405Sjkim#endif 7655714Skris 77296341Sdelphijconst char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT; 7855714Skris 79296341Sdelphij#define MIN_LENGTH 4 8055714Skris 81296341Sdelphijstatic int load_iv(char **fromp, unsigned char *to, int num); 8259191Skrisstatic int check_pem(const char *nm, const char *name); 83238405Sjkimint pem_check_suffix(const char *pem_str, const char *suffix); 8455714Skris 85109998Smarkmint PEM_def_callback(char *buf, int num, int w, void *key) 86296341Sdelphij{ 87109998Smarkm#ifdef OPENSSL_NO_FP_API 88296341Sdelphij /* 89296341Sdelphij * We should not ever call the default callback routine from windows. 90296341Sdelphij */ 91296341Sdelphij PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 92296341Sdelphij return (-1); 9355714Skris#else 94296341Sdelphij int i, j; 95296341Sdelphij const char *prompt; 96296341Sdelphij if (key) { 97296341Sdelphij i = strlen(key); 98296341Sdelphij i = (i > num) ? num : i; 99296341Sdelphij memcpy(buf, key, i); 100296341Sdelphij return (i); 101296341Sdelphij } 10255714Skris 103296341Sdelphij prompt = EVP_get_pw_prompt(); 104296341Sdelphij if (prompt == NULL) 105296341Sdelphij prompt = "Enter PEM pass phrase:"; 10655714Skris 107296341Sdelphij for (;;) { 108296341Sdelphij i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w); 109296341Sdelphij if (i != 0) { 110296341Sdelphij PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); 111296341Sdelphij memset(buf, 0, (unsigned int)num); 112296341Sdelphij return (-1); 113296341Sdelphij } 114296341Sdelphij j = strlen(buf); 115296341Sdelphij if (j < MIN_LENGTH) { 116296341Sdelphij fprintf(stderr, 117296341Sdelphij "phrase is too short, needs to be at least %d chars\n", 118296341Sdelphij MIN_LENGTH); 119296341Sdelphij } else 120296341Sdelphij break; 121296341Sdelphij } 122296341Sdelphij return (j); 12355714Skris#endif 124296341Sdelphij} 12555714Skris 12655714Skrisvoid PEM_proc_type(char *buf, int type) 127296341Sdelphij{ 128296341Sdelphij const char *str; 12955714Skris 130296341Sdelphij if (type == PEM_TYPE_ENCRYPTED) 131296341Sdelphij str = "ENCRYPTED"; 132296341Sdelphij else if (type == PEM_TYPE_MIC_CLEAR) 133296341Sdelphij str = "MIC-CLEAR"; 134296341Sdelphij else if (type == PEM_TYPE_MIC_ONLY) 135296341Sdelphij str = "MIC-ONLY"; 136296341Sdelphij else 137296341Sdelphij str = "BAD-TYPE"; 13855714Skris 139296341Sdelphij BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE); 140296341Sdelphij BUF_strlcat(buf, str, PEM_BUFSIZE); 141296341Sdelphij BUF_strlcat(buf, "\n", PEM_BUFSIZE); 142296341Sdelphij} 143296341Sdelphij 14455714Skrisvoid PEM_dek_info(char *buf, const char *type, int len, char *str) 145296341Sdelphij{ 146296341Sdelphij static const unsigned char map[17] = "0123456789ABCDEF"; 147296341Sdelphij long i; 148296341Sdelphij int j; 14955714Skris 150296341Sdelphij BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE); 151296341Sdelphij BUF_strlcat(buf, type, PEM_BUFSIZE); 152296341Sdelphij BUF_strlcat(buf, ",", PEM_BUFSIZE); 153296341Sdelphij j = strlen(buf); 154296341Sdelphij if (j + (len * 2) + 1 > PEM_BUFSIZE) 155296341Sdelphij return; 156296341Sdelphij for (i = 0; i < len; i++) { 157296341Sdelphij buf[j + i * 2] = map[(str[i] >> 4) & 0x0f]; 158296341Sdelphij buf[j + i * 2 + 1] = map[(str[i]) & 0x0f]; 159296341Sdelphij } 160296341Sdelphij buf[j + i * 2] = '\n'; 161296341Sdelphij buf[j + i * 2 + 1] = '\0'; 162296341Sdelphij} 16355714Skris 164109998Smarkm#ifndef OPENSSL_NO_FP_API 165160814Ssimonvoid *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, 166296341Sdelphij pem_password_cb *cb, void *u) 167296341Sdelphij{ 168296341Sdelphij BIO *b; 169296341Sdelphij void *ret; 17055714Skris 171296341Sdelphij if ((b = BIO_new(BIO_s_file())) == NULL) { 172296341Sdelphij PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB); 173296341Sdelphij return (0); 174296341Sdelphij } 175296341Sdelphij BIO_set_fp(b, fp, BIO_NOCLOSE); 176296341Sdelphij ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); 177296341Sdelphij BIO_free(b); 178296341Sdelphij return (ret); 179296341Sdelphij} 18055714Skris#endif 18155714Skris 18259191Skrisstatic int check_pem(const char *nm, const char *name) 18359191Skris{ 184296341Sdelphij /* Normal matching nm and name */ 185296341Sdelphij if (!strcmp(nm, name)) 186296341Sdelphij return 1; 18759191Skris 188296341Sdelphij /* Make PEM_STRING_EVP_PKEY match any private key */ 18959191Skris 190296341Sdelphij if (!strcmp(name, PEM_STRING_EVP_PKEY)) { 191296341Sdelphij int slen; 192296341Sdelphij const EVP_PKEY_ASN1_METHOD *ameth; 193296341Sdelphij if (!strcmp(nm, PEM_STRING_PKCS8)) 194296341Sdelphij return 1; 195296341Sdelphij if (!strcmp(nm, PEM_STRING_PKCS8INF)) 196296341Sdelphij return 1; 197296341Sdelphij slen = pem_check_suffix(nm, "PRIVATE KEY"); 198296341Sdelphij if (slen > 0) { 199296341Sdelphij /* 200296341Sdelphij * NB: ENGINE implementations wont contain a deprecated old 201296341Sdelphij * private key decode function so don't look for them. 202296341Sdelphij */ 203296341Sdelphij ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); 204296341Sdelphij if (ameth && ameth->old_priv_decode) 205296341Sdelphij return 1; 206296341Sdelphij } 207296341Sdelphij return 0; 208296341Sdelphij } 20959191Skris 210296341Sdelphij if (!strcmp(name, PEM_STRING_PARAMETERS)) { 211296341Sdelphij int slen; 212296341Sdelphij const EVP_PKEY_ASN1_METHOD *ameth; 213296341Sdelphij slen = pem_check_suffix(nm, "PARAMETERS"); 214296341Sdelphij if (slen > 0) { 215296341Sdelphij ENGINE *e; 216296341Sdelphij ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); 217296341Sdelphij if (ameth) { 218296341Sdelphij int r; 219296341Sdelphij if (ameth->param_decode) 220296341Sdelphij r = 1; 221296341Sdelphij else 222296341Sdelphij r = 0; 223238405Sjkim#ifndef OPENSSL_NO_ENGINE 224296341Sdelphij if (e) 225296341Sdelphij ENGINE_finish(e); 226238405Sjkim#endif 227296341Sdelphij return r; 228296341Sdelphij } 229296341Sdelphij } 230296341Sdelphij return 0; 231296341Sdelphij } 23259191Skris 233296341Sdelphij /* Permit older strings */ 23459191Skris 235296341Sdelphij if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509)) 236296341Sdelphij return 1; 23759191Skris 238296341Sdelphij if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) && 239296341Sdelphij !strcmp(name, PEM_STRING_X509_REQ)) 240296341Sdelphij return 1; 24159191Skris 242296341Sdelphij /* Allow normal certs to be read as trusted certs */ 243296341Sdelphij if (!strcmp(nm, PEM_STRING_X509) && 244296341Sdelphij !strcmp(name, PEM_STRING_X509_TRUSTED)) 245296341Sdelphij return 1; 24659191Skris 247296341Sdelphij if (!strcmp(nm, PEM_STRING_X509_OLD) && 248296341Sdelphij !strcmp(name, PEM_STRING_X509_TRUSTED)) 249296341Sdelphij return 1; 25059191Skris 251296341Sdelphij /* Some CAs use PKCS#7 with CERTIFICATE headers */ 252296341Sdelphij if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7)) 253296341Sdelphij return 1; 25459191Skris 255296341Sdelphij if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && 256296341Sdelphij !strcmp(name, PEM_STRING_PKCS7)) 257296341Sdelphij return 1; 258194206Ssimon 259238405Sjkim#ifndef OPENSSL_NO_CMS 260296341Sdelphij if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_CMS)) 261296341Sdelphij return 1; 262296341Sdelphij /* Allow CMS to be read from PKCS#7 headers */ 263296341Sdelphij if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS)) 264296341Sdelphij return 1; 265238405Sjkim#endif 266238405Sjkim 267296341Sdelphij return 0; 26859191Skris} 26959191Skris 270296341Sdelphijint PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, 271296341Sdelphij const char *name, BIO *bp, pem_password_cb *cb, 272296341Sdelphij void *u) 273296341Sdelphij{ 274296341Sdelphij EVP_CIPHER_INFO cipher; 275296341Sdelphij char *nm = NULL, *header = NULL; 276296341Sdelphij unsigned char *data = NULL; 277296341Sdelphij long len; 278296341Sdelphij int ret = 0; 27955714Skris 280296341Sdelphij for (;;) { 281296341Sdelphij if (!PEM_read_bio(bp, &nm, &header, &data, &len)) { 282296341Sdelphij if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) 283296341Sdelphij ERR_add_error_data(2, "Expecting: ", name); 284296341Sdelphij return 0; 285296341Sdelphij } 286296341Sdelphij if (check_pem(nm, name)) 287296341Sdelphij break; 288296341Sdelphij OPENSSL_free(nm); 289296341Sdelphij OPENSSL_free(header); 290296341Sdelphij OPENSSL_free(data); 291296341Sdelphij } 292296341Sdelphij if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 293296341Sdelphij goto err; 294296341Sdelphij if (!PEM_do_header(&cipher, data, &len, cb, u)) 295296341Sdelphij goto err; 296109998Smarkm 297296341Sdelphij *pdata = data; 298296341Sdelphij *plen = len; 299109998Smarkm 300296341Sdelphij if (pnm) 301296341Sdelphij *pnm = nm; 302109998Smarkm 303296341Sdelphij ret = 1; 304109998Smarkm 305296341Sdelphij err: 306296341Sdelphij if (!ret || !pnm) 307296341Sdelphij OPENSSL_free(nm); 308296341Sdelphij OPENSSL_free(header); 309296341Sdelphij if (!ret) 310296341Sdelphij OPENSSL_free(data); 311296341Sdelphij return ret; 312296341Sdelphij} 31355714Skris 314109998Smarkm#ifndef OPENSSL_NO_FP_API 315160814Ssimonint PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, 316296341Sdelphij void *x, const EVP_CIPHER *enc, unsigned char *kstr, 317296341Sdelphij int klen, pem_password_cb *callback, void *u) 318296341Sdelphij{ 319296341Sdelphij BIO *b; 320296341Sdelphij int ret; 32155714Skris 322296341Sdelphij if ((b = BIO_new(BIO_s_file())) == NULL) { 323296341Sdelphij PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB); 324296341Sdelphij return (0); 325296341Sdelphij } 326296341Sdelphij BIO_set_fp(b, fp, BIO_NOCLOSE); 327296341Sdelphij ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); 328296341Sdelphij BIO_free(b); 329296341Sdelphij return (ret); 330296341Sdelphij} 33155714Skris#endif 33255714Skris 333160814Ssimonint PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, 334296341Sdelphij void *x, const EVP_CIPHER *enc, unsigned char *kstr, 335296341Sdelphij int klen, pem_password_cb *callback, void *u) 336296341Sdelphij{ 337296341Sdelphij EVP_CIPHER_CTX ctx; 338296341Sdelphij int dsize = 0, i, j, ret = 0; 339296341Sdelphij unsigned char *p, *data = NULL; 340296341Sdelphij const char *objstr = NULL; 341296341Sdelphij char buf[PEM_BUFSIZE]; 342296341Sdelphij unsigned char key[EVP_MAX_KEY_LENGTH]; 343296341Sdelphij unsigned char iv[EVP_MAX_IV_LENGTH]; 34455714Skris 345296341Sdelphij if (enc != NULL) { 346296341Sdelphij objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 347296341Sdelphij if (objstr == NULL) { 348296341Sdelphij PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); 349296341Sdelphij goto err; 350296341Sdelphij } 351296341Sdelphij } 35255714Skris 353296341Sdelphij if ((dsize = i2d(x, NULL)) < 0) { 354296341Sdelphij PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB); 355296341Sdelphij dsize = 0; 356296341Sdelphij goto err; 357296341Sdelphij } 358296341Sdelphij /* dzise + 8 bytes are needed */ 359296341Sdelphij /* actually it needs the cipher block size extra... */ 360296341Sdelphij data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20); 361296341Sdelphij if (data == NULL) { 362296341Sdelphij PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); 363296341Sdelphij goto err; 364296341Sdelphij } 365296341Sdelphij p = data; 366296341Sdelphij i = i2d(x, &p); 367296341Sdelphij 368296341Sdelphij if (enc != NULL) { 369296341Sdelphij if (kstr == NULL) { 370296341Sdelphij if (callback == NULL) 371296341Sdelphij klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); 372296341Sdelphij else 373296341Sdelphij klen = (*callback) (buf, PEM_BUFSIZE, 1, u); 374296341Sdelphij if (klen <= 0) { 375296341Sdelphij PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY); 376296341Sdelphij goto err; 377296341Sdelphij } 37855714Skris#ifdef CHARSET_EBCDIC 379296341Sdelphij /* Convert the pass phrase from EBCDIC */ 380296341Sdelphij ebcdic2ascii(buf, buf, klen); 38155714Skris#endif 382296341Sdelphij kstr = (unsigned char *)buf; 383296341Sdelphij } 384296341Sdelphij RAND_add(data, i, 0); /* put in the RSA key. */ 385296341Sdelphij OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); 386296341Sdelphij if (RAND_pseudo_bytes(iv, enc->iv_len) < 0) /* Generate a salt */ 387296341Sdelphij goto err; 388296341Sdelphij /* 389296341Sdelphij * The 'iv' is used as the iv and as a salt. It is NOT taken from 390296341Sdelphij * the BytesToKey function 391296341Sdelphij */ 392296341Sdelphij if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) 393296341Sdelphij goto err; 39455714Skris 395296341Sdelphij if (kstr == (unsigned char *)buf) 396296341Sdelphij OPENSSL_cleanse(buf, PEM_BUFSIZE); 39755714Skris 398296341Sdelphij OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <= 399296341Sdelphij sizeof buf); 400109998Smarkm 401296341Sdelphij buf[0] = '\0'; 402296341Sdelphij PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 403296341Sdelphij PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 404296341Sdelphij /* k=strlen(buf); */ 405109998Smarkm 406296341Sdelphij EVP_CIPHER_CTX_init(&ctx); 407296341Sdelphij ret = 1; 408296341Sdelphij if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) 409296341Sdelphij || !EVP_EncryptUpdate(&ctx, data, &j, data, i) 410296341Sdelphij || !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i)) 411296341Sdelphij ret = 0; 412296341Sdelphij EVP_CIPHER_CTX_cleanup(&ctx); 413296341Sdelphij if (ret == 0) 414296341Sdelphij goto err; 415296341Sdelphij i += j; 416296341Sdelphij } else { 417296341Sdelphij ret = 1; 418296341Sdelphij buf[0] = '\0'; 419296341Sdelphij } 420296341Sdelphij i = PEM_write_bio(bp, name, buf, data, i); 421296341Sdelphij if (i <= 0) 422296341Sdelphij ret = 0; 423296341Sdelphij err: 424296341Sdelphij OPENSSL_cleanse(key, sizeof(key)); 425296341Sdelphij OPENSSL_cleanse(iv, sizeof(iv)); 426296341Sdelphij OPENSSL_cleanse((char *)&ctx, sizeof(ctx)); 427296341Sdelphij OPENSSL_cleanse(buf, PEM_BUFSIZE); 428296341Sdelphij if (data != NULL) { 429296341Sdelphij OPENSSL_cleanse(data, (unsigned int)dsize); 430296341Sdelphij OPENSSL_free(data); 431296341Sdelphij } 432296341Sdelphij return (ret); 433296341Sdelphij} 43455714Skris 43555714Skrisint PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, 436296341Sdelphij pem_password_cb *callback, void *u) 437296341Sdelphij{ 438296341Sdelphij int i = 0, j, o, klen; 439296341Sdelphij long len; 440296341Sdelphij EVP_CIPHER_CTX ctx; 441296341Sdelphij unsigned char key[EVP_MAX_KEY_LENGTH]; 442296341Sdelphij char buf[PEM_BUFSIZE]; 44355714Skris 444296341Sdelphij len = *plen; 44555714Skris 446296341Sdelphij if (cipher->cipher == NULL) 447296341Sdelphij return (1); 448296341Sdelphij if (callback == NULL) 449296341Sdelphij klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); 450296341Sdelphij else 451296341Sdelphij klen = callback(buf, PEM_BUFSIZE, 0, u); 452296341Sdelphij if (klen <= 0) { 453296341Sdelphij PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); 454296341Sdelphij return (0); 455296341Sdelphij } 45655714Skris#ifdef CHARSET_EBCDIC 457296341Sdelphij /* Convert the pass phrase from EBCDIC */ 458296341Sdelphij ebcdic2ascii(buf, buf, klen); 45955714Skris#endif 46055714Skris 461296341Sdelphij if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), 462296341Sdelphij (unsigned char *)buf, klen, 1, key, NULL)) 463296341Sdelphij return 0; 46455714Skris 465296341Sdelphij j = (int)len; 466296341Sdelphij EVP_CIPHER_CTX_init(&ctx); 467296341Sdelphij o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); 468296341Sdelphij if (o) 469296341Sdelphij o = EVP_DecryptUpdate(&ctx, data, &i, data, j); 470296341Sdelphij if (o) 471296341Sdelphij o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j); 472296341Sdelphij EVP_CIPHER_CTX_cleanup(&ctx); 473296341Sdelphij OPENSSL_cleanse((char *)buf, sizeof(buf)); 474296341Sdelphij OPENSSL_cleanse((char *)key, sizeof(key)); 475296341Sdelphij j += i; 476296341Sdelphij if (!o) { 477296341Sdelphij PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); 478296341Sdelphij return (0); 479296341Sdelphij } 480296341Sdelphij *plen = j; 481296341Sdelphij return (1); 482296341Sdelphij} 48355714Skris 48455714Skrisint PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) 485296341Sdelphij{ 486296341Sdelphij const EVP_CIPHER *enc = NULL; 487296341Sdelphij char *p, c; 488296341Sdelphij char **header_pp = &header; 48955714Skris 490296341Sdelphij cipher->cipher = NULL; 491296341Sdelphij if ((header == NULL) || (*header == '\0') || (*header == '\n')) 492296341Sdelphij return (1); 493296341Sdelphij if (strncmp(header, "Proc-Type: ", 11) != 0) { 494296341Sdelphij PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); 495296341Sdelphij return (0); 496296341Sdelphij } 497296341Sdelphij header += 11; 498296341Sdelphij if (*header != '4') 499296341Sdelphij return (0); 500296341Sdelphij header++; 501296341Sdelphij if (*header != ',') 502296341Sdelphij return (0); 503296341Sdelphij header++; 504296341Sdelphij if (strncmp(header, "ENCRYPTED", 9) != 0) { 505296341Sdelphij PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); 506296341Sdelphij return (0); 507296341Sdelphij } 508296341Sdelphij for (; (*header != '\n') && (*header != '\0'); header++) ; 509296341Sdelphij if (*header == '\0') { 510296341Sdelphij PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); 511296341Sdelphij return (0); 512296341Sdelphij } 513296341Sdelphij header++; 514296341Sdelphij if (strncmp(header, "DEK-Info: ", 10) != 0) { 515296341Sdelphij PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); 516296341Sdelphij return (0); 517296341Sdelphij } 518296341Sdelphij header += 10; 51955714Skris 520296341Sdelphij p = header; 521296341Sdelphij for (;;) { 522296341Sdelphij c = *header; 52355714Skris#ifndef CHARSET_EBCDIC 524296341Sdelphij if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') || 525296341Sdelphij ((c >= '0') && (c <= '9')))) 526296341Sdelphij break; 52755714Skris#else 528296341Sdelphij if (!(isupper(c) || (c == '-') || isdigit(c))) 529296341Sdelphij break; 53055714Skris#endif 531296341Sdelphij header++; 532296341Sdelphij } 533296341Sdelphij *header = '\0'; 534296341Sdelphij cipher->cipher = enc = EVP_get_cipherbyname(p); 535296341Sdelphij *header = c; 536296341Sdelphij header++; 53755714Skris 538296341Sdelphij if (enc == NULL) { 539296341Sdelphij PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); 540296341Sdelphij return (0); 541296341Sdelphij } 542296341Sdelphij if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len)) 543296341Sdelphij return (0); 54455714Skris 545296341Sdelphij return (1); 546296341Sdelphij} 54755714Skris 548160814Ssimonstatic int load_iv(char **fromp, unsigned char *to, int num) 549296341Sdelphij{ 550296341Sdelphij int v, i; 551296341Sdelphij char *from; 55255714Skris 553296341Sdelphij from = *fromp; 554296341Sdelphij for (i = 0; i < num; i++) 555296341Sdelphij to[i] = 0; 556296341Sdelphij num *= 2; 557296341Sdelphij for (i = 0; i < num; i++) { 558296341Sdelphij if ((*from >= '0') && (*from <= '9')) 559296341Sdelphij v = *from - '0'; 560296341Sdelphij else if ((*from >= 'A') && (*from <= 'F')) 561296341Sdelphij v = *from - 'A' + 10; 562296341Sdelphij else if ((*from >= 'a') && (*from <= 'f')) 563296341Sdelphij v = *from - 'a' + 10; 564296341Sdelphij else { 565296341Sdelphij PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS); 566296341Sdelphij return (0); 567296341Sdelphij } 568296341Sdelphij from++; 569296341Sdelphij to[i / 2] |= v << (long)((!(i & 1)) * 4); 570296341Sdelphij } 57155714Skris 572296341Sdelphij *fromp = from; 573296341Sdelphij return (1); 574296341Sdelphij} 57555714Skris 576109998Smarkm#ifndef OPENSSL_NO_FP_API 57755714Skrisint PEM_write(FILE *fp, char *name, char *header, unsigned char *data, 578296341Sdelphij long len) 579296341Sdelphij{ 580296341Sdelphij BIO *b; 581296341Sdelphij int ret; 58255714Skris 583296341Sdelphij if ((b = BIO_new(BIO_s_file())) == NULL) { 584296341Sdelphij PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB); 585296341Sdelphij return (0); 586296341Sdelphij } 587296341Sdelphij BIO_set_fp(b, fp, BIO_NOCLOSE); 588296341Sdelphij ret = PEM_write_bio(b, name, header, data, len); 589296341Sdelphij BIO_free(b); 590296341Sdelphij return (ret); 591296341Sdelphij} 59255714Skris#endif 59355714Skris 594296341Sdelphijint PEM_write_bio(BIO *bp, const char *name, char *header, 595296341Sdelphij unsigned char *data, long len) 596296341Sdelphij{ 597296341Sdelphij int nlen, n, i, j, outl; 598296341Sdelphij unsigned char *buf = NULL; 599296341Sdelphij EVP_ENCODE_CTX ctx; 600296341Sdelphij int reason = ERR_R_BUF_LIB; 60155714Skris 602296341Sdelphij EVP_EncodeInit(&ctx); 603296341Sdelphij nlen = strlen(name); 60455714Skris 605296341Sdelphij if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || 606296341Sdelphij (BIO_write(bp, name, nlen) != nlen) || 607296341Sdelphij (BIO_write(bp, "-----\n", 6) != 6)) 608296341Sdelphij goto err; 60955714Skris 610296341Sdelphij i = strlen(header); 611296341Sdelphij if (i > 0) { 612296341Sdelphij if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) 613296341Sdelphij goto err; 614296341Sdelphij } 61555714Skris 616296341Sdelphij buf = OPENSSL_malloc(PEM_BUFSIZE * 8); 617296341Sdelphij if (buf == NULL) { 618296341Sdelphij reason = ERR_R_MALLOC_FAILURE; 619296341Sdelphij goto err; 620296341Sdelphij } 621296341Sdelphij 622296341Sdelphij i = j = 0; 623296341Sdelphij while (len > 0) { 624296341Sdelphij n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); 625296341Sdelphij EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n); 626296341Sdelphij if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) 627296341Sdelphij goto err; 628296341Sdelphij i += outl; 629296341Sdelphij len -= n; 630296341Sdelphij j += n; 631296341Sdelphij } 632296341Sdelphij EVP_EncodeFinal(&ctx, buf, &outl); 633296341Sdelphij if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) 634296341Sdelphij goto err; 635296341Sdelphij OPENSSL_cleanse(buf, PEM_BUFSIZE * 8); 636296341Sdelphij OPENSSL_free(buf); 637296341Sdelphij buf = NULL; 638296341Sdelphij if ((BIO_write(bp, "-----END ", 9) != 9) || 639296341Sdelphij (BIO_write(bp, name, nlen) != nlen) || 640296341Sdelphij (BIO_write(bp, "-----\n", 6) != 6)) 641296341Sdelphij goto err; 642296341Sdelphij return (i + outl); 643296341Sdelphij err: 644296341Sdelphij if (buf) { 645296341Sdelphij OPENSSL_cleanse(buf, PEM_BUFSIZE * 8); 646296341Sdelphij OPENSSL_free(buf); 647296341Sdelphij } 648296341Sdelphij PEMerr(PEM_F_PEM_WRITE_BIO, reason); 649296341Sdelphij return (0); 650296341Sdelphij} 651296341Sdelphij 652109998Smarkm#ifndef OPENSSL_NO_FP_API 65355714Skrisint PEM_read(FILE *fp, char **name, char **header, unsigned char **data, 654296341Sdelphij long *len) 655296341Sdelphij{ 656296341Sdelphij BIO *b; 657296341Sdelphij int ret; 65855714Skris 659296341Sdelphij if ((b = BIO_new(BIO_s_file())) == NULL) { 660296341Sdelphij PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB); 661296341Sdelphij return (0); 662296341Sdelphij } 663296341Sdelphij BIO_set_fp(b, fp, BIO_NOCLOSE); 664296341Sdelphij ret = PEM_read_bio(b, name, header, data, len); 665296341Sdelphij BIO_free(b); 666296341Sdelphij return (ret); 667296341Sdelphij} 66855714Skris#endif 66955714Skris 67055714Skrisint PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, 671296341Sdelphij long *len) 672296341Sdelphij{ 673296341Sdelphij EVP_ENCODE_CTX ctx; 674296341Sdelphij int end = 0, i, k, bl = 0, hl = 0, nohead = 0; 675296341Sdelphij char buf[256]; 676296341Sdelphij BUF_MEM *nameB; 677296341Sdelphij BUF_MEM *headerB; 678296341Sdelphij BUF_MEM *dataB, *tmpB; 67955714Skris 680296341Sdelphij nameB = BUF_MEM_new(); 681296341Sdelphij headerB = BUF_MEM_new(); 682296341Sdelphij dataB = BUF_MEM_new(); 683296341Sdelphij if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { 684296341Sdelphij BUF_MEM_free(nameB); 685296341Sdelphij BUF_MEM_free(headerB); 686296341Sdelphij BUF_MEM_free(dataB); 687296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 688296341Sdelphij return (0); 689296341Sdelphij } 69055714Skris 691296341Sdelphij buf[254] = '\0'; 692296341Sdelphij for (;;) { 693296341Sdelphij i = BIO_gets(bp, buf, 254); 69455714Skris 695296341Sdelphij if (i <= 0) { 696296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE); 697296341Sdelphij goto err; 698296341Sdelphij } 69955714Skris 700296341Sdelphij while ((i >= 0) && (buf[i] <= ' ')) 701296341Sdelphij i--; 702296341Sdelphij buf[++i] = '\n'; 703296341Sdelphij buf[++i] = '\0'; 70455714Skris 705296341Sdelphij if (strncmp(buf, "-----BEGIN ", 11) == 0) { 706296341Sdelphij i = strlen(&(buf[11])); 70755714Skris 708296341Sdelphij if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0) 709296341Sdelphij continue; 710296341Sdelphij if (!BUF_MEM_grow(nameB, i + 9)) { 711296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 712296341Sdelphij goto err; 713296341Sdelphij } 714296341Sdelphij memcpy(nameB->data, &(buf[11]), i - 6); 715296341Sdelphij nameB->data[i - 6] = '\0'; 716296341Sdelphij break; 717296341Sdelphij } 718296341Sdelphij } 719296341Sdelphij hl = 0; 720296341Sdelphij if (!BUF_MEM_grow(headerB, 256)) { 721296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 722296341Sdelphij goto err; 723296341Sdelphij } 724296341Sdelphij headerB->data[0] = '\0'; 725296341Sdelphij for (;;) { 726296341Sdelphij i = BIO_gets(bp, buf, 254); 727296341Sdelphij if (i <= 0) 728296341Sdelphij break; 72955714Skris 730296341Sdelphij while ((i >= 0) && (buf[i] <= ' ')) 731296341Sdelphij i--; 732296341Sdelphij buf[++i] = '\n'; 733296341Sdelphij buf[++i] = '\0'; 73455714Skris 735296341Sdelphij if (buf[0] == '\n') 736296341Sdelphij break; 737296341Sdelphij if (!BUF_MEM_grow(headerB, hl + i + 9)) { 738296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 739296341Sdelphij goto err; 740296341Sdelphij } 741296341Sdelphij if (strncmp(buf, "-----END ", 9) == 0) { 742296341Sdelphij nohead = 1; 743296341Sdelphij break; 744296341Sdelphij } 745296341Sdelphij memcpy(&(headerB->data[hl]), buf, i); 746296341Sdelphij headerB->data[hl + i] = '\0'; 747296341Sdelphij hl += i; 748296341Sdelphij } 74955714Skris 750296341Sdelphij bl = 0; 751296341Sdelphij if (!BUF_MEM_grow(dataB, 1024)) { 752296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 753296341Sdelphij goto err; 754296341Sdelphij } 755296341Sdelphij dataB->data[0] = '\0'; 756296341Sdelphij if (!nohead) { 757296341Sdelphij for (;;) { 758296341Sdelphij i = BIO_gets(bp, buf, 254); 759296341Sdelphij if (i <= 0) 760296341Sdelphij break; 76155714Skris 762296341Sdelphij while ((i >= 0) && (buf[i] <= ' ')) 763296341Sdelphij i--; 764296341Sdelphij buf[++i] = '\n'; 765296341Sdelphij buf[++i] = '\0'; 76655714Skris 767296341Sdelphij if (i != 65) 768296341Sdelphij end = 1; 769296341Sdelphij if (strncmp(buf, "-----END ", 9) == 0) 770296341Sdelphij break; 771296341Sdelphij if (i > 65) 772296341Sdelphij break; 773296341Sdelphij if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) { 774296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); 775296341Sdelphij goto err; 776296341Sdelphij } 777296341Sdelphij memcpy(&(dataB->data[bl]), buf, i); 778296341Sdelphij dataB->data[bl + i] = '\0'; 779296341Sdelphij bl += i; 780296341Sdelphij if (end) { 781296341Sdelphij buf[0] = '\0'; 782296341Sdelphij i = BIO_gets(bp, buf, 254); 783296341Sdelphij if (i <= 0) 784296341Sdelphij break; 78555714Skris 786296341Sdelphij while ((i >= 0) && (buf[i] <= ' ')) 787296341Sdelphij i--; 788296341Sdelphij buf[++i] = '\n'; 789296341Sdelphij buf[++i] = '\0'; 79055714Skris 791296341Sdelphij break; 792296341Sdelphij } 793296341Sdelphij } 794296341Sdelphij } else { 795296341Sdelphij tmpB = headerB; 796296341Sdelphij headerB = dataB; 797296341Sdelphij dataB = tmpB; 798296341Sdelphij bl = hl; 799296341Sdelphij } 800296341Sdelphij i = strlen(nameB->data); 801296341Sdelphij if ((strncmp(buf, "-----END ", 9) != 0) || 802296341Sdelphij (strncmp(nameB->data, &(buf[9]), i) != 0) || 803296341Sdelphij (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) { 804296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE); 805296341Sdelphij goto err; 806296341Sdelphij } 80755714Skris 808296341Sdelphij EVP_DecodeInit(&ctx); 809296341Sdelphij i = EVP_DecodeUpdate(&ctx, 810296341Sdelphij (unsigned char *)dataB->data, &bl, 811296341Sdelphij (unsigned char *)dataB->data, bl); 812296341Sdelphij if (i < 0) { 813296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); 814296341Sdelphij goto err; 815296341Sdelphij } 816296341Sdelphij i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k); 817296341Sdelphij if (i < 0) { 818296341Sdelphij PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); 819296341Sdelphij goto err; 820296341Sdelphij } 821296341Sdelphij bl += k; 822238405Sjkim 823296341Sdelphij if (bl == 0) 824296341Sdelphij goto err; 825296341Sdelphij *name = nameB->data; 826296341Sdelphij *header = headerB->data; 827296341Sdelphij *data = (unsigned char *)dataB->data; 828296341Sdelphij *len = bl; 829296341Sdelphij OPENSSL_free(nameB); 830296341Sdelphij OPENSSL_free(headerB); 831296341Sdelphij OPENSSL_free(dataB); 832296341Sdelphij return (1); 833296341Sdelphij err: 834296341Sdelphij BUF_MEM_free(nameB); 835296341Sdelphij BUF_MEM_free(headerB); 836296341Sdelphij BUF_MEM_free(dataB); 837296341Sdelphij return (0); 838296341Sdelphij} 839296341Sdelphij 840296341Sdelphij/* 841296341Sdelphij * Check pem string and return prefix length. If for example the pem_str == 842296341Sdelphij * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the 843296341Sdelphij * string "RSA". 844238405Sjkim */ 845238405Sjkim 846238405Sjkimint pem_check_suffix(const char *pem_str, const char *suffix) 847296341Sdelphij{ 848296341Sdelphij int pem_len = strlen(pem_str); 849296341Sdelphij int suffix_len = strlen(suffix); 850296341Sdelphij const char *p; 851296341Sdelphij if (suffix_len + 1 >= pem_len) 852296341Sdelphij return 0; 853296341Sdelphij p = pem_str + pem_len - suffix_len; 854296341Sdelphij if (strcmp(p, suffix)) 855296341Sdelphij return 0; 856296341Sdelphij p--; 857296341Sdelphij if (*p != ' ') 858296341Sdelphij return 0; 859296341Sdelphij return p - pem_str; 860296341Sdelphij} 861