X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fpem%2Fpem_lib.c;h=f1df0a40b165d634fe08b27bb351f5f9f1a23895;hp=49db780bedf676f3d7b08cc209f747e4360b3991;hb=HEAD;hpb=a0e7c8eede26b29b09057f48b8e51f46f8811ddd diff --git a/crypto/pem/pem_lib.c b/crypto/pem/pem_lib.c index 49db780bed..9d8ad35ad3 100644 --- a/crypto/pem/pem_lib.c +++ b/crypto/pem/pem_lib.c @@ -1,63 +1,19 @@ -/* crypto/pem/pem_lib.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * 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 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 acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS 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 AUTHOR OR 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. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ +/* We need to use some engine deprecated APIs */ +#define OPENSSL_SUPPRESS_DEPRECATED + #include -#include "cryptlib.h" +#include "crypto/ctype.h" +#include +#include "internal/cryptlib.h" #include #include #include @@ -65,709 +21,1015 @@ #include #include #include -#ifndef OPENSSL_NO_DES +#include "crypto/asn1.h" #include -#endif +#include -const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT; +#define MIN_LENGTH 4 -#define MIN_LENGTH 4 - -static int load_iv(unsigned char **fromp,unsigned char *to, int num); +static int load_iv(char **fromp, unsigned char *to, int num); static int check_pem(const char *nm, const char *name); +int ossl_pem_check_suffix(const char *pem_str, const char *suffix); -int PEM_def_callback(char *buf, int num, int w, void *key) - { -#ifdef OPENSSL_NO_FP_API - /* We should not ever call the default callback routine from - * windows. */ - PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); - return(-1); -#else - int i,j; - const char *prompt; - if(key) { - i=strlen(key); - i=(i > num)?num:i; - memcpy(buf,key,i); - return(i); - } - - prompt=EVP_get_pw_prompt(); - if (prompt == NULL) - prompt="Enter PEM pass phrase:"; - - for (;;) - { - i=EVP_read_pw_string(buf,num,prompt,w); - if (i != 0) - { - PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD); - memset(buf,0,(unsigned int)num); - return(-1); - } - j=strlen(buf); - if (j < MIN_LENGTH) - { - fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH); - } - else - break; - } - return(j); -#endif - } +int PEM_def_callback(char *buf, int num, int rwflag, void *userdata) +{ + int i, min_len; + const char *prompt; + + /* We assume that the user passes a default password as userdata */ + if (userdata) { + i = strlen(userdata); + i = (i > num) ? num : i; + memcpy(buf, userdata, i); + return i; + } + + prompt = EVP_get_pw_prompt(); + if (prompt == NULL) + prompt = "Enter PEM pass phrase:"; + + /* + * rwflag == 0 means decryption + * rwflag == 1 means encryption + * + * We assume that for encryption, we want a minimum length, while for + * decryption, we cannot know any minimum length, so we assume zero. + */ + min_len = rwflag ? MIN_LENGTH : 0; + + i = EVP_read_pw_string_min(buf, min_len, num, prompt, rwflag); + if (i != 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_PROBLEMS_GETTING_PASSWORD); + memset(buf, 0, (unsigned int)num); + return -1; + } + return strlen(buf); +} void PEM_proc_type(char *buf, int type) - { - const char *str; - - if (type == PEM_TYPE_ENCRYPTED) - str="ENCRYPTED"; - else if (type == PEM_TYPE_MIC_CLEAR) - str="MIC-CLEAR"; - else if (type == PEM_TYPE_MIC_ONLY) - str="MIC-ONLY"; - else - str="BAD-TYPE"; - - BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE); - BUF_strlcat(buf,str,PEM_BUFSIZE); - BUF_strlcat(buf,"\n",PEM_BUFSIZE); - } - -void PEM_dek_info(char *buf, const char *type, int len, char *str) - { - static const unsigned char map[17]="0123456789ABCDEF"; - long i; - int j; - - BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE); - BUF_strlcat(buf,type,PEM_BUFSIZE); - BUF_strlcat(buf,",",PEM_BUFSIZE); - j=strlen(buf); - if (j + (len * 2) + 1 > PEM_BUFSIZE) - return; - for (i=0; i>4)&0x0f]; - buf[j+i*2+1]=map[(str[i] )&0x0f]; - } - buf[j+i*2]='\n'; - buf[j+i*2+1]='\0'; - } - -#ifndef OPENSSL_NO_FP_API -char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x, - pem_password_cb *cb, void *u) - { - BIO *b; - char *ret; - - if ((b=BIO_new(BIO_s_file())) == NULL) - { - PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB); - return(0); - } - BIO_set_fp(b,fp,BIO_NOCLOSE); - ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u); - BIO_free(b); - return(ret); - } -#endif - -static int check_pem(const char *nm, const char *name) { - /* Normal matching nm and name */ - if (!strcmp(nm,name)) return 1; - - /* Make PEM_STRING_EVP_PKEY match any private key */ - - if(!strcmp(nm,PEM_STRING_PKCS8) && - !strcmp(name,PEM_STRING_EVP_PKEY)) return 1; - - if(!strcmp(nm,PEM_STRING_PKCS8INF) && - !strcmp(name,PEM_STRING_EVP_PKEY)) return 1; + const char *str; + char *p = buf + strlen(buf); + + if (type == PEM_TYPE_ENCRYPTED) + str = "ENCRYPTED"; + else if (type == PEM_TYPE_MIC_CLEAR) + str = "MIC-CLEAR"; + else if (type == PEM_TYPE_MIC_ONLY) + str = "MIC-ONLY"; + else + str = "BAD-TYPE"; + + BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str); +} - if(!strcmp(nm,PEM_STRING_RSA) && - !strcmp(name,PEM_STRING_EVP_PKEY)) return 1; +void PEM_dek_info(char *buf, const char *type, int len, const char *str) +{ + long i; + char *p = buf + strlen(buf); + int j = PEM_BUFSIZE - (size_t)(p - buf), n; + + n = BIO_snprintf(p, j, "DEK-Info: %s,", type); + if (n > 0) { + j -= n; + p += n; + for (i = 0; i < len; i++) { + n = BIO_snprintf(p, j, "%02X", 0xff & str[i]); + if (n <= 0) + return; + j -= n; + p += n; + } + if (j > 1) + strcpy(p, "\n"); + } +} - if(!strcmp(nm,PEM_STRING_DSA) && - !strcmp(name,PEM_STRING_EVP_PKEY)) return 1; +#ifndef OPENSSL_NO_STDIO +void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, + pem_password_cb *cb, void *u) +{ + BIO *b; + void *ret; + + if ((b = BIO_new(BIO_s_file())) == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); + return 0; + } + BIO_set_fp(b, fp, BIO_NOCLOSE); + ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); + BIO_free(b); + return ret; +} +#endif - if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) && - !strcmp(name,PEM_STRING_EVP_PKEY)) return 1; - /* Permit older strings */ +static int check_pem(const char *nm, const char *name) +{ + /* Normal matching nm and name */ + if (strcmp(nm, name) == 0) + return 1; + + /* Make PEM_STRING_EVP_PKEY match any private key */ + + if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) { + int slen; + const EVP_PKEY_ASN1_METHOD *ameth; + if (strcmp(nm, PEM_STRING_PKCS8) == 0) + return 1; + if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) + return 1; + slen = ossl_pem_check_suffix(nm, "PRIVATE KEY"); + if (slen > 0) { + /* + * NB: ENGINE implementations won't contain a deprecated old + * private key decode function so don't look for them. + */ + ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); + if (ameth && ameth->old_priv_decode) + return 1; + } + return 0; + } + + if (strcmp(name, PEM_STRING_PARAMETERS) == 0) { + int slen; + const EVP_PKEY_ASN1_METHOD *ameth; + slen = ossl_pem_check_suffix(nm, "PARAMETERS"); + if (slen > 0) { + ENGINE *e; + ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); + if (ameth) { + int r; + if (ameth->param_decode) + r = 1; + else + r = 0; +#ifndef OPENSSL_NO_ENGINE + ENGINE_finish(e); +#endif + return r; + } + } + return 0; + } + /* If reading DH parameters handle X9.42 DH format too */ + if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0 + && strcmp(name, PEM_STRING_DHPARAMS) == 0) + return 1; + + /* Permit older strings */ + + if (strcmp(nm, PEM_STRING_X509_OLD) == 0 + && strcmp(name, PEM_STRING_X509) == 0) + return 1; + + if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0 + && strcmp(name, PEM_STRING_X509_REQ) == 0) + return 1; + + /* Allow normal certs to be read as trusted certs */ + if (strcmp(nm, PEM_STRING_X509) == 0 + && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) + return 1; + + if (strcmp(nm, PEM_STRING_X509_OLD) == 0 + && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) + return 1; + + /* Some CAs use PKCS#7 with CERTIFICATE headers */ + if (strcmp(nm, PEM_STRING_X509) == 0 + && strcmp(name, PEM_STRING_PKCS7) == 0) + return 1; + + if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0 + && strcmp(name, PEM_STRING_PKCS7) == 0) + return 1; + +#ifndef OPENSSL_NO_CMS + if (strcmp(nm, PEM_STRING_X509) == 0 + && strcmp(name, PEM_STRING_CMS) == 0) + return 1; + /* Allow CMS to be read from PKCS#7 headers */ + if (strcmp(nm, PEM_STRING_PKCS7) == 0 + && strcmp(name, PEM_STRING_CMS) == 0) + return 1; +#endif - if(!strcmp(nm,PEM_STRING_X509_OLD) && - !strcmp(name,PEM_STRING_X509)) return 1; + return 0; +} - if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) && - !strcmp(name,PEM_STRING_X509_REQ)) return 1; +#define PEM_FREE(p, flags, num) \ + pem_free((p), (flags), (num), OPENSSL_FILE, OPENSSL_LINE) +static void pem_free(void *p, unsigned int flags, size_t num, + const char *file, int line) +{ + if (flags & PEM_FLAG_SECURE) + CRYPTO_secure_clear_free(p, num, file, line); + else + CRYPTO_free(p, file, line); +} - /* Allow normal certs to be read as trusted certs */ - if(!strcmp(nm,PEM_STRING_X509) && - !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; +#define PEM_MALLOC(num, flags) \ + pem_malloc((num), (flags), OPENSSL_FILE, OPENSSL_LINE) +static void *pem_malloc(int num, unsigned int flags, + const char *file, int line) +{ + return (flags & PEM_FLAG_SECURE) ? CRYPTO_secure_malloc(num, file, line) + : CRYPTO_malloc(num, file, line); - if(!strcmp(nm,PEM_STRING_X509_OLD) && - !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; +} - /* Some CAs use PKCS#7 with CERTIFICATE headers */ - if(!strcmp(nm, PEM_STRING_X509) && - !strcmp(name, PEM_STRING_PKCS7)) return 1; +static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen, + char **pnm, const char *name, BIO *bp, + pem_password_cb *cb, void *u, + unsigned int flags) +{ + EVP_CIPHER_INFO cipher; + char *nm = NULL, *header = NULL; + unsigned char *data = NULL; + long len = 0; + int ret = 0; + + do { + PEM_FREE(nm, flags, 0); + PEM_FREE(header, flags, 0); + PEM_FREE(data, flags, len); + if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) { + if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) + ERR_add_error_data(2, "Expecting: ", name); + return 0; + } + } while (!check_pem(nm, name)); + if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) + goto err; + if (!PEM_do_header(&cipher, data, &len, cb, u)) + goto err; + + *pdata = data; + *plen = len; + + if (pnm != NULL) + *pnm = nm; + + ret = 1; + + err: + if (!ret || pnm == NULL) + PEM_FREE(nm, flags, 0); + PEM_FREE(header, flags, 0); + if (!ret) + PEM_FREE(data, flags, len); + return ret; +} - return 0; +int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, + const char *name, BIO *bp, pem_password_cb *cb, + void *u) { + return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, + PEM_FLAG_EAY_COMPATIBLE); } -int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp, - pem_password_cb *cb, void *u) - { - EVP_CIPHER_INFO cipher; - char *nm=NULL,*header=NULL; - unsigned char *data=NULL; - long len; - int ret = 0; - - for (;;) - { - if (!PEM_read_bio(bp,&nm,&header,&data,&len)) { - if(ERR_GET_REASON(ERR_peek_error()) == - PEM_R_NO_START_LINE) - ERR_add_error_data(2, "Expecting: ", name); - return 0; - } - if(check_pem(nm, name)) break; - OPENSSL_free(nm); - OPENSSL_free(header); - OPENSSL_free(data); - } - if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err; - if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err; - - *pdata = data; - *plen = len; - - if (pnm) - *pnm = nm; - - ret = 1; +int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm, + const char *name, BIO *bp, pem_password_cb *cb, + void *u) { + return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, + PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE); +} -err: - if (!ret || !pnm) OPENSSL_free(nm); - OPENSSL_free(header); - if (!ret) OPENSSL_free(data); - return ret; - } - -#ifndef OPENSSL_NO_FP_API -int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x, - const EVP_CIPHER *enc, unsigned char *kstr, int klen, - pem_password_cb *callback, void *u) - { - BIO *b; - int ret; - - if ((b=BIO_new(BIO_s_file())) == NULL) - { - PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB); - return(0); - } - BIO_set_fp(b,fp,BIO_NOCLOSE); - ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u); - BIO_free(b); - return(ret); - } +#ifndef OPENSSL_NO_STDIO +int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, + const void *x, const EVP_CIPHER *enc, + const unsigned char *kstr, int klen, + pem_password_cb *callback, void *u) +{ + BIO *b; + int ret; + + if ((b = BIO_new(BIO_s_file())) == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); + return 0; + } + BIO_set_fp(b, fp, BIO_NOCLOSE); + ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); + BIO_free(b); + return ret; +} #endif -int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x, - const EVP_CIPHER *enc, unsigned char *kstr, int klen, - pem_password_cb *callback, void *u) - { - EVP_CIPHER_CTX ctx; - int dsize=0,i,j,ret=0; - unsigned char *p,*data=NULL; - const char *objstr=NULL; - char buf[PEM_BUFSIZE]; - unsigned char key[EVP_MAX_KEY_LENGTH]; - unsigned char iv[EVP_MAX_IV_LENGTH]; - - if (enc != NULL) - { - objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc)); - if (objstr == NULL) - { - PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER); - goto err; - } - } - - if ((dsize=i2d(x,NULL)) < 0) - { - PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB); - dsize=0; - goto err; - } - /* dzise + 8 bytes are needed */ - /* actually it needs the cipher block size extra... */ - data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20); - if (data == NULL) - { - PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE); - goto err; - } - p=data; - i=i2d(x,&p); - - if (enc != NULL) - { - if (kstr == NULL) - { - if (callback == NULL) - klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u); - else - klen=(*callback)(buf,PEM_BUFSIZE,1,u); - if (klen <= 0) - { - PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY); - goto err; - } +int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, + const void *x, const EVP_CIPHER *enc, + const unsigned char *kstr, int klen, + pem_password_cb *callback, void *u) +{ + EVP_CIPHER_CTX *ctx = NULL; + int dsize = 0, i = 0, j = 0, ret = 0; + unsigned char *p, *data = NULL; + const char *objstr = NULL; + char buf[PEM_BUFSIZE]; + unsigned char key[EVP_MAX_KEY_LENGTH]; + unsigned char iv[EVP_MAX_IV_LENGTH]; + + if (enc != NULL) { + objstr = EVP_CIPHER_get0_name(enc); + if (objstr == NULL || EVP_CIPHER_get_iv_length(enc) == 0 + || EVP_CIPHER_get_iv_length(enc) > (int)sizeof(iv) + /* + * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n" + * fits into buf + */ + || strlen(objstr) + 23 + 2 * EVP_CIPHER_get_iv_length(enc) + 13 + > sizeof(buf)) { + ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_CIPHER); + goto err; + } + } + + if ((dsize = i2d(x, NULL)) <= 0) { + ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB); + dsize = 0; + goto err; + } + /* dsize + 8 bytes are needed */ + /* actually it needs the cipher block size extra... */ + data = OPENSSL_malloc((unsigned int)dsize + 20); + if (data == NULL) + goto err; + p = data; + i = i2d(x, &p); + + if (enc != NULL) { + if (kstr == NULL) { + if (callback == NULL) + klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); + else + klen = (*callback) (buf, PEM_BUFSIZE, 1, u); + if (klen <= 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_READ_KEY); + goto err; + } #ifdef CHARSET_EBCDIC - /* Convert the pass phrase from EBCDIC */ - ebcdic2ascii(buf, buf, klen); + /* Convert the pass phrase from EBCDIC */ + ebcdic2ascii(buf, buf, klen); #endif - kstr=(unsigned char *)buf; - } - RAND_add(data,i,0);/* put in the RSA key. */ - OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); - if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */ - goto err; - /* The 'iv' is used as the iv and as a salt. It is - * NOT taken from the BytesToKey function */ - EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL); - - if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE); - - OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf); - - buf[0]='\0'; - PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); - PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv); - /* k=strlen(buf); */ - - EVP_CIPHER_CTX_init(&ctx); - EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv); - EVP_EncryptUpdate(&ctx,data,&j,data,i); - EVP_EncryptFinal_ex(&ctx,&(data[j]),&i); - EVP_CIPHER_CTX_cleanup(&ctx); - i+=j; - ret=1; - } - else - { - ret=1; - buf[0]='\0'; - } - i=PEM_write_bio(bp,name,buf,data,i); - if (i <= 0) ret=0; -err: - OPENSSL_cleanse(key,sizeof(key)); - OPENSSL_cleanse(iv,sizeof(iv)); - OPENSSL_cleanse((char *)&ctx,sizeof(ctx)); - OPENSSL_cleanse(buf,PEM_BUFSIZE); - if (data != NULL) - { - OPENSSL_cleanse(data,(unsigned int)dsize); - OPENSSL_free(data); - } - return(ret); - } + kstr = (unsigned char *)buf; + } + /* Generate a salt */ + if (RAND_bytes(iv, EVP_CIPHER_get_iv_length(enc)) <= 0) + goto err; + /* + * The 'iv' is used as the iv and as a salt. It is NOT taken from + * the BytesToKey function + */ + if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) + goto err; + + if (kstr == (unsigned char *)buf) + OPENSSL_cleanse(buf, PEM_BUFSIZE); + + buf[0] = '\0'; + PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); + PEM_dek_info(buf, objstr, EVP_CIPHER_get_iv_length(enc), (char *)iv); + /* k=strlen(buf); */ + + ret = 1; + if ((ctx = EVP_CIPHER_CTX_new()) == NULL + || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv) + || !EVP_EncryptUpdate(ctx, data, &j, data, i) + || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i)) + ret = 0; + if (ret == 0) + goto err; + i += j; + } else { + ret = 1; + buf[0] = '\0'; + } + i = PEM_write_bio(bp, name, buf, data, i); + if (i <= 0) + ret = 0; + err: + OPENSSL_cleanse(key, sizeof(key)); + OPENSSL_cleanse(iv, sizeof(iv)); + EVP_CIPHER_CTX_free(ctx); + OPENSSL_cleanse(buf, PEM_BUFSIZE); + OPENSSL_clear_free(data, (unsigned int)dsize); + return ret; +} int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, - pem_password_cb *callback,void *u) - { - int i,j,o,klen; - long len; - EVP_CIPHER_CTX ctx; - unsigned char key[EVP_MAX_KEY_LENGTH]; - char buf[PEM_BUFSIZE]; - - len= *plen; - - if (cipher->cipher == NULL) return(1); - if (callback == NULL) - klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u); - else - klen=callback(buf,PEM_BUFSIZE,0,u); - if (klen <= 0) - { - PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ); - return(0); - } + pem_password_cb *callback, void *u) +{ + int ok; + int keylen; + long len = *plen; + int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */ + EVP_CIPHER_CTX *ctx; + unsigned char key[EVP_MAX_KEY_LENGTH]; + char buf[PEM_BUFSIZE]; + +#if LONG_MAX > INT_MAX + /* Check that we did not truncate the length */ + if (len > INT_MAX) { + ERR_raise(ERR_LIB_PEM, PEM_R_HEADER_TOO_LONG); + return 0; + } +#endif + + if (cipher->cipher == NULL) + return 1; + if (callback == NULL) + keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); + else + keylen = callback(buf, PEM_BUFSIZE, 0, u); + if (keylen < 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ); + return 0; + } #ifdef CHARSET_EBCDIC - /* Convert the pass phrase from EBCDIC */ - ebcdic2ascii(buf, buf, klen); + /* Convert the pass phrase from EBCDIC */ + ebcdic2ascii(buf, buf, keylen); #endif - EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), - (unsigned char *)buf,klen,1,key,NULL); - - j=(int)len; - EVP_CIPHER_CTX_init(&ctx); - EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0])); - EVP_DecryptUpdate(&ctx,data,&i,data,j); - o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j); - EVP_CIPHER_CTX_cleanup(&ctx); - OPENSSL_cleanse((char *)buf,sizeof(buf)); - OPENSSL_cleanse((char *)key,sizeof(key)); - j+=i; - if (!o) - { - PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT); - return(0); - } - *plen=j; - return(1); - } + if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), + (unsigned char *)buf, keylen, 1, key, NULL)) + return 0; + + ctx = EVP_CIPHER_CTX_new(); + if (ctx == NULL) + return 0; + + ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); + if (ok) + ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen); + if (ok) { + /* Squirrel away the length of data decrypted so far. */ + *plen = ilen; + ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen); + } + if (ok) + *plen += ilen; + else + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_DECRYPT); + + EVP_CIPHER_CTX_free(ctx); + OPENSSL_cleanse((char *)buf, sizeof(buf)); + OPENSSL_cleanse((char *)key, sizeof(key)); + return ok; +} +/* + * This implements a very limited PEM header parser that does not support the + * full grammar of rfc1421. In particular, folded headers are not supported, + * nor is additional whitespace. + * + * A robust implementation would make use of a library that turns the headers + * into a BIO from which one folded line is read at a time, and is then split + * into a header label and content. We would then parse the content of the + * headers we care about. This is overkill for just this limited use-case, but + * presumably we also parse rfc822-style headers for S/MIME, so a common + * abstraction might well be more generally useful. + */ +#define PROC_TYPE "Proc-Type:" +#define ENCRYPTED "ENCRYPTED" +#define DEK_INFO "DEK-Info:" int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) - { - int o; - const EVP_CIPHER *enc=NULL; - char *p,c; - - cipher->cipher=NULL; - if ((header == NULL) || (*header == '\0') || (*header == '\n')) - return(1); - if (strncmp(header,"Proc-Type: ",11) != 0) - { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); } - header+=11; - if (*header != '4') return(0); header++; - if (*header != ',') return(0); header++; - if (strncmp(header,"ENCRYPTED",9) != 0) - { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); } - for (; (*header != '\n') && (*header != '\0'); header++) - ; - if (*header == '\0') - { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); } - header++; - if (strncmp(header,"DEK-Info: ",10) != 0) - { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); } - header+=10; - - p=header; - for (;;) - { - c= *header; -#ifndef CHARSET_EBCDIC - if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || - ((c >= '0') && (c <= '9')))) - break; -#else - if (!( isupper(c) || (c == '-') || - isdigit(c))) - break; +{ + const EVP_CIPHER *enc = NULL; + int ivlen; + char *dekinfostart, c; + + cipher->cipher = NULL; + memset(cipher->iv, 0, sizeof(cipher->iv)); + if ((header == NULL) || (*header == '\0') || (*header == '\n')) + return 1; + + if (!CHECK_AND_SKIP_PREFIX(header, PROC_TYPE)) { + ERR_raise(ERR_LIB_PEM, PEM_R_NOT_PROC_TYPE); + return 0; + } + header += strspn(header, " \t"); + + if (*header++ != '4' || *header++ != ',') + return 0; + header += strspn(header, " \t"); + + /* We expect "ENCRYPTED" followed by optional white-space + line break */ + if (!CHECK_AND_SKIP_PREFIX(header, ENCRYPTED) || + strspn(header, " \t\r\n") == 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_NOT_ENCRYPTED); + return 0; + } + header += strspn(header, " \t\r"); + if (*header++ != '\n') { + ERR_raise(ERR_LIB_PEM, PEM_R_SHORT_HEADER); + return 0; + } + + /*- + * https://tools.ietf.org/html/rfc1421#section-4.6.1.3 + * We expect "DEK-Info: algo[,hex-parameters]" + */ + if (!CHECK_AND_SKIP_PREFIX(header, DEK_INFO)) { + ERR_raise(ERR_LIB_PEM, PEM_R_NOT_DEK_INFO); + return 0; + } + header += strspn(header, " \t"); + + /* + * DEK-INFO is a comma-separated combination of algorithm name and optional + * parameters. + */ + dekinfostart = header; + header += strcspn(header, " \t,"); + c = *header; + *header = '\0'; + cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart); + *header = c; + header += strspn(header, " \t"); + + if (enc == NULL) { + ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_ENCRYPTION); + return 0; + } + ivlen = EVP_CIPHER_get_iv_length(enc); + if (ivlen > 0 && *header++ != ',') { + ERR_raise(ERR_LIB_PEM, PEM_R_MISSING_DEK_IV); + return 0; + } else if (ivlen == 0 && *header == ',') { + ERR_raise(ERR_LIB_PEM, PEM_R_UNEXPECTED_DEK_IV); + return 0; + } + + if (!load_iv(&header, cipher->iv, EVP_CIPHER_get_iv_length(enc))) + return 0; + + return 1; +} + +static int load_iv(char **fromp, unsigned char *to, int num) +{ + int v, i; + char *from; + + from = *fromp; + for (i = 0; i < num; i++) + to[i] = 0; + num *= 2; + for (i = 0; i < num; i++) { + v = OPENSSL_hexchar2int(*from); + if (v < 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_IV_CHARS); + return 0; + } + from++; + to[i / 2] |= v << (long)((!(i & 1)) * 4); + } + + *fromp = from; + return 1; +} + +#ifndef OPENSSL_NO_STDIO +int PEM_write(FILE *fp, const char *name, const char *header, + const unsigned char *data, long len) +{ + BIO *b; + int ret; + + if ((b = BIO_new(BIO_s_file())) == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); + return 0; + } + BIO_set_fp(b, fp, BIO_NOCLOSE); + ret = PEM_write_bio(b, name, header, data, len); + BIO_free(b); + return ret; +} #endif - header++; - } - *header='\0'; - o=OBJ_sn2nid(p); - cipher->cipher=enc=EVP_get_cipherbyname(p); - *header=c; - header++; - - if (enc == NULL) - { - PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION); - return(0); - } - if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),enc->iv_len)) return(0); - - return(1); - } - -static int load_iv(unsigned char **fromp, unsigned char *to, int num) - { - int v,i; - unsigned char *from; - - from= *fromp; - for (i=0; i= '0') && (*from <= '9')) - v= *from-'0'; - else if ((*from >= 'A') && (*from <= 'F')) - v= *from-'A'+10; - else if ((*from >= 'a') && (*from <= 'f')) - v= *from-'a'+10; - else - { - PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS); - return(0); - } - from++; - to[i/2]|=v<<(long)((!(i&1))*4); - } - - *fromp=from; - return(1); - } - -#ifndef OPENSSL_NO_FP_API -int PEM_write(FILE *fp, char *name, char *header, unsigned char *data, - long len) - { - BIO *b; - int ret; - - if ((b=BIO_new(BIO_s_file())) == NULL) - { - PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB); - return(0); - } - BIO_set_fp(b,fp,BIO_NOCLOSE); - ret=PEM_write_bio(b, name, header, data,len); - BIO_free(b); - return(ret); + +int PEM_write_bio(BIO *bp, const char *name, const char *header, + const unsigned char *data, long len) +{ + int nlen, n, i, j, outl; + unsigned char *buf = NULL; + EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); + int reason = 0; + int retval = 0; + + if (ctx == NULL) { + reason = ERR_R_EVP_LIB; + goto err; + } + + EVP_EncodeInit(ctx); + nlen = strlen(name); + + if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || + (BIO_write(bp, name, nlen) != nlen) || + (BIO_write(bp, "-----\n", 6) != 6)) { + reason = ERR_R_BIO_LIB; + goto err; + } + + i = header != NULL ? strlen(header) : 0; + if (i > 0) { + if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) { + reason = ERR_R_BIO_LIB; + goto err; } + } + + buf = OPENSSL_malloc(PEM_BUFSIZE * 8); + if (buf == NULL) + goto err; + + i = j = 0; + while (len > 0) { + n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); + if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n)) { + reason = ERR_R_EVP_LIB; + goto err; + } + if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) { + reason = ERR_R_BIO_LIB; + goto err; + } + i += outl; + len -= n; + j += n; + } + EVP_EncodeFinal(ctx, buf, &outl); + if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) { + reason = ERR_R_BIO_LIB; + goto err; + } + if ((BIO_write(bp, "-----END ", 9) != 9) || + (BIO_write(bp, name, nlen) != nlen) || + (BIO_write(bp, "-----\n", 6) != 6)) { + reason = ERR_R_BIO_LIB; + goto err; + } + retval = i + outl; + + err: + if (retval == 0 && reason != 0) + ERR_raise(ERR_LIB_PEM, reason); + EVP_ENCODE_CTX_free(ctx); + OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); + return retval; +} + +#ifndef OPENSSL_NO_STDIO +int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, + long *len) +{ + BIO *b; + int ret; + + if ((b = BIO_new(BIO_s_file())) == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); + return 0; + } + BIO_set_fp(b, fp, BIO_NOCLOSE); + ret = PEM_read_bio(b, name, header, data, len); + BIO_free(b); + return ret; +} #endif -int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data, - long len) - { - int nlen,n,i,j,outl; - unsigned char *buf = NULL; - EVP_ENCODE_CTX ctx; - int reason=ERR_R_BUF_LIB; - - EVP_EncodeInit(&ctx); - nlen=strlen(name); - - if ( (BIO_write(bp,"-----BEGIN ",11) != 11) || - (BIO_write(bp,name,nlen) != nlen) || - (BIO_write(bp,"-----\n",6) != 6)) - goto err; - - i=strlen(header); - if (i > 0) - { - if ( (BIO_write(bp,header,i) != i) || - (BIO_write(bp,"\n",1) != 1)) - goto err; - } - - buf = OPENSSL_malloc(PEM_BUFSIZE*8); - if (buf == NULL) - { - reason=ERR_R_MALLOC_FAILURE; - goto err; - } - - i=j=0; - while (len > 0) - { - n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len); - EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n); - if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl)) - goto err; - i+=outl; - len-=n; - j+=n; - } - EVP_EncodeFinal(&ctx,buf,&outl); - if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err; - OPENSSL_free(buf); - buf = NULL; - if ( (BIO_write(bp,"-----END ",9) != 9) || - (BIO_write(bp,name,nlen) != nlen) || - (BIO_write(bp,"-----\n",6) != 6)) - goto err; - return(i+outl); +/* Some helpers for PEM_read_bio_ex(). */ +static int sanitize_line(char *linebuf, int len, unsigned int flags, int first_call) +{ + int i; + if (first_call) { + /* Other BOMs imply unsupported multibyte encoding, + * so don't strip them and let the error raise */ + const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF}; + + if (len > 3 && memcmp(linebuf, utf8_bom, 3) == 0) { + memmove(linebuf, linebuf + 3, len - 3); + linebuf[len - 3] = 0; + len -= 3; + } + } + + if (flags & PEM_FLAG_EAY_COMPATIBLE) { + /* Strip trailing whitespace */ + while ((len >= 0) && (linebuf[len] <= ' ')) + len--; + /* Go back to whitespace before applying uniform line ending. */ + len++; + } else if (flags & PEM_FLAG_ONLY_B64) { + for (i = 0; i < len; ++i) { + if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n' + || linebuf[i] == '\r') + break; + } + len = i; + } else { + /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip + * control characters in-place and let everything through. */ + for (i = 0; i < len; ++i) { + if (linebuf[i] == '\n' || linebuf[i] == '\r') + break; + if (ossl_iscntrl(linebuf[i])) + linebuf[i] = ' '; + } + len = i; + } + /* The caller allocated LINESIZE+1, so this is safe. */ + linebuf[len++] = '\n'; + linebuf[len] = '\0'; + return len; +} + +#define LINESIZE 255 +/* Note trailing spaces for begin and end. */ +#define BEGINSTR "-----BEGIN " +#define ENDSTR "-----END " +#define TAILSTR "-----\n" +#define BEGINLEN ((int)(sizeof(BEGINSTR) - 1)) +#define ENDLEN ((int)(sizeof(ENDSTR) - 1)) +#define TAILLEN ((int)(sizeof(TAILSTR) - 1)) +static int get_name(BIO *bp, char **name, unsigned int flags) +{ + char *linebuf; + int ret = 0; + int len; + int first_call = 1; + + /* + * Need to hold trailing NUL (accounted for by BIO_gets() and the newline + * that will be added by sanitize_line() (the extra '1'). + */ + linebuf = PEM_MALLOC(LINESIZE + 1, flags); + if (linebuf == NULL) + return 0; + + do { + len = BIO_gets(bp, linebuf, LINESIZE); + + if (len <= 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_NO_START_LINE); + goto err; + } + + /* Strip trailing garbage and standardize ending. */ + len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64, first_call); + first_call = 0; + + /* Allow leading empty or non-matching lines. */ + } while (!HAS_PREFIX(linebuf, BEGINSTR) + || len < TAILLEN + || !HAS_PREFIX(linebuf + len - TAILLEN, TAILSTR)); + linebuf[len - TAILLEN] = '\0'; + len = len - BEGINLEN - TAILLEN + 1; + *name = PEM_MALLOC(len, flags); + if (*name == NULL) + goto err; + memcpy(*name, linebuf + BEGINLEN, len); + ret = 1; + err: - if (buf) - OPENSSL_free(buf); - PEMerr(PEM_F_PEM_WRITE_BIO,reason); - return(0); - } + PEM_FREE(linebuf, flags, LINESIZE + 1); + return ret; +} -#ifndef OPENSSL_NO_FP_API -int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, - long *len) - { - BIO *b; - int ret; - - if ((b=BIO_new(BIO_s_file())) == NULL) - { - PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB); - return(0); - } - BIO_set_fp(b,fp,BIO_NOCLOSE); - ret=PEM_read_bio(b, name, header, data,len); - BIO_free(b); - return(ret); +/* Keep track of how much of a header we've seen. */ +enum header_status { + MAYBE_HEADER, + IN_HEADER, + POST_HEADER +}; + +/** + * Extract the optional PEM header, with details on the type of content and + * any encryption used on the contents, and the bulk of the data from the bio. + * The end of the header is marked by a blank line; if the end-of-input marker + * is reached prior to a blank line, there is no header. + * + * The header and data arguments are BIO** since we may have to swap them + * if there is no header, for efficiency. + * + * We need the name of the PEM-encoded type to verify the end string. + */ +static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name, + unsigned int flags) +{ + BIO *tmp = *header; + char *linebuf, *p; + int len, ret = 0, end = 0, prev_partial_line_read = 0, partial_line_read = 0; + /* 0 if not seen (yet), 1 if reading header, 2 if finished header */ + enum header_status got_header = MAYBE_HEADER; + unsigned int flags_mask; + size_t namelen; + + /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline + * that will be added by sanitize_line() (the extra '1'). */ + linebuf = PEM_MALLOC(LINESIZE + 1, flags); + if (linebuf == NULL) + return 0; + + while(1) { + flags_mask = ~0u; + len = BIO_gets(bp, linebuf, LINESIZE); + if (len <= 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); + goto err; } -#endif -int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, - long *len) - { - EVP_ENCODE_CTX ctx; - int end=0,i,k,bl=0,hl=0,nohead=0; - char buf[256]; - BUF_MEM *nameB; - BUF_MEM *headerB; - BUF_MEM *dataB,*tmpB; - - nameB=BUF_MEM_new(); - headerB=BUF_MEM_new(); - dataB=BUF_MEM_new(); - if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) - { - PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); - return(0); - } - - buf[254]='\0'; - for (;;) - { - i=BIO_gets(bp,buf,254); - - if (i <= 0) - { - PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE); - goto err; - } - - while ((i >= 0) && (buf[i] <= ' ')) i--; - buf[++i]='\n'; buf[++i]='\0'; - - if (strncmp(buf,"-----BEGIN ",11) == 0) - { - i=strlen(&(buf[11])); - - if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0) - continue; - if (!BUF_MEM_grow(nameB,i+9)) - { - PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); - goto err; - } - memcpy(nameB->data,&(buf[11]),i-6); - nameB->data[i-6]='\0'; - break; - } - } - hl=0; - if (!BUF_MEM_grow(headerB,256)) - { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } - headerB->data[0]='\0'; - for (;;) - { - i=BIO_gets(bp,buf,254); - if (i <= 0) break; - - while ((i >= 0) && (buf[i] <= ' ')) i--; - buf[++i]='\n'; buf[++i]='\0'; - - if (buf[0] == '\n') break; - if (!BUF_MEM_grow(headerB,hl+i+9)) - { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } - if (strncmp(buf,"-----END ",9) == 0) - { - nohead=1; - break; - } - memcpy(&(headerB->data[hl]),buf,i); - headerB->data[hl+i]='\0'; - hl+=i; - } - - bl=0; - if (!BUF_MEM_grow(dataB,1024)) - { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } - dataB->data[0]='\0'; - if (!nohead) - { - for (;;) - { - i=BIO_gets(bp,buf,254); - if (i <= 0) break; - - while ((i >= 0) && (buf[i] <= ' ')) i--; - buf[++i]='\n'; buf[++i]='\0'; - - if (i != 65) end=1; - if (strncmp(buf,"-----END ",9) == 0) - break; - if (i > 65) break; - if (!BUF_MEM_grow_clean(dataB,i+bl+9)) - { - PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); - goto err; - } - memcpy(&(dataB->data[bl]),buf,i); - dataB->data[bl+i]='\0'; - bl+=i; - if (end) - { - buf[0]='\0'; - i=BIO_gets(bp,buf,254); - if (i <= 0) break; - - while ((i >= 0) && (buf[i] <= ' ')) i--; - buf[++i]='\n'; buf[++i]='\0'; - - break; - } - } - } - else - { - tmpB=headerB; - headerB=dataB; - dataB=tmpB; - bl=hl; - } - i=strlen(nameB->data); - if ( (strncmp(buf,"-----END ",9) != 0) || - (strncmp(nameB->data,&(buf[9]),i) != 0) || - (strncmp(&(buf[9+i]),"-----\n",6) != 0)) - { - PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE); - goto err; - } - - EVP_DecodeInit(&ctx); - i=EVP_DecodeUpdate(&ctx, - (unsigned char *)dataB->data,&bl, - (unsigned char *)dataB->data,bl); - if (i < 0) - { - PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE); - goto err; - } - i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k); - if (i < 0) - { - PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE); - goto err; - } - bl+=k; - - if (bl == 0) goto err; - *name=nameB->data; - *header=headerB->data; - *data=(unsigned char *)dataB->data; - *len=bl; - OPENSSL_free(nameB); - OPENSSL_free(headerB); - OPENSSL_free(dataB); - return(1); + /* + * Check if line has been read completely or if only part of the line + * has been read. Keep the previous value to ignore newlines that + * appear due to reading a line up until the char before the newline. + */ + prev_partial_line_read = partial_line_read; + partial_line_read = len == LINESIZE-1 && linebuf[LINESIZE-2] != '\n'; + + if (got_header == MAYBE_HEADER) { + if (memchr(linebuf, ':', len) != NULL) + got_header = IN_HEADER; + } + if (HAS_PREFIX(linebuf, ENDSTR) || got_header == IN_HEADER) + flags_mask &= ~PEM_FLAG_ONLY_B64; + len = sanitize_line(linebuf, len, flags & flags_mask, 0); + + /* Check for end of header. */ + if (linebuf[0] == '\n') { + /* + * If previous line has been read only partially this newline is a + * regular newline at the end of a line and not an empty line. + */ + if (!prev_partial_line_read) { + if (got_header == POST_HEADER) { + /* Another blank line is an error. */ + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); + goto err; + } + got_header = POST_HEADER; + tmp = *data; + } + continue; + } + + /* Check for end of stream (which means there is no header). */ + p = linebuf; + if (CHECK_AND_SKIP_PREFIX(p, ENDSTR)) { + namelen = strlen(name); + if (strncmp(p, name, namelen) != 0 || + !HAS_PREFIX(p + namelen, TAILSTR)) { + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); + goto err; + } + if (got_header == MAYBE_HEADER) { + *header = *data; + *data = tmp; + } + break; + } else if (end) { + /* Malformed input; short line not at end of data. */ + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); + goto err; + } + /* + * Else, a line of text -- could be header or data; we don't + * know yet. Just pass it through. + */ + if (BIO_puts(tmp, linebuf) < 0) + goto err; + /* + * Only encrypted files need the line length check applied. + */ + if (got_header == POST_HEADER) { + /* 65 includes the trailing newline */ + if (len > 65) + goto err; + if (len < 65) + end = 1; + } + } + + ret = 1; err: - BUF_MEM_free(nameB); - BUF_MEM_free(headerB); - BUF_MEM_free(dataB); - return(0); - } + PEM_FREE(linebuf, flags, LINESIZE + 1); + return ret; +} + +/** + * Read in PEM-formatted data from the given BIO. + * + * By nature of the PEM format, all content must be printable ASCII (except + * for line endings). Other characters are malformed input and will be rejected. + */ +int PEM_read_bio_ex(BIO *bp, char **name_out, char **header, + unsigned char **data, long *len_out, unsigned int flags) +{ + EVP_ENCODE_CTX *ctx = NULL; + const BIO_METHOD *bmeth; + BIO *headerB = NULL, *dataB = NULL; + char *name = NULL; + int len, taillen, headerlen, ret = 0; + BUF_MEM *buf_mem; + + *len_out = 0; + *name_out = *header = NULL; + *data = NULL; + if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) { + /* These two are mutually incompatible; bail out. */ + ERR_raise(ERR_LIB_PEM, ERR_R_PASSED_INVALID_ARGUMENT); + goto end; + } + bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem(); + + headerB = BIO_new(bmeth); + dataB = BIO_new(bmeth); + if (headerB == NULL || dataB == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_BIO_LIB); + goto end; + } + + if (!get_name(bp, &name, flags)) + goto end; + if (!get_header_and_data(bp, &headerB, &dataB, name, flags)) + goto end; + + BIO_get_mem_ptr(dataB, &buf_mem); + len = buf_mem->length; + + /* There was no data in the PEM file */ + if (len == 0) + goto end; + + ctx = EVP_ENCODE_CTX_new(); + if (ctx == NULL) { + ERR_raise(ERR_LIB_PEM, ERR_R_EVP_LIB); + goto end; + } + + EVP_DecodeInit(ctx); + if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len, + (unsigned char*)buf_mem->data, len) < 0 + || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]), + &taillen) < 0) { + ERR_raise(ERR_LIB_PEM, PEM_R_BAD_BASE64_DECODE); + goto end; + } + len += taillen; + buf_mem->length = len; + + headerlen = BIO_get_mem_data(headerB, NULL); + *header = PEM_MALLOC(headerlen + 1, flags); + *data = PEM_MALLOC(len, flags); + if (*header == NULL || *data == NULL) + goto out_free; + if (headerlen != 0 && BIO_read(headerB, *header, headerlen) != headerlen) + goto out_free; + (*header)[headerlen] = '\0'; + if (BIO_read(dataB, *data, len) != len) + goto out_free; + *len_out = len; + *name_out = name; + name = NULL; + ret = 1; + goto end; + +out_free: + PEM_FREE(*header, flags, 0); + *header = NULL; + PEM_FREE(*data, flags, 0); + *data = NULL; +end: + EVP_ENCODE_CTX_free(ctx); + PEM_FREE(name, flags, 0); + BIO_free(headerB); + BIO_free(dataB); + return ret; +} + +int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, + long *len) +{ + return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE); +} + +/* + * Check pem string and return prefix length. If for example the pem_str == + * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the + * string "RSA". + */ + +int ossl_pem_check_suffix(const char *pem_str, const char *suffix) +{ + int pem_len = strlen(pem_str); + int suffix_len = strlen(suffix); + const char *p; + if (suffix_len + 1 >= pem_len) + return 0; + p = pem_str + pem_len - suffix_len; + if (strcmp(p, suffix)) + return 0; + p--; + if (*p != ' ') + return 0; + return p - pem_str; +}