X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=apps%2Fenc.c;h=a64c654d4d2b37d8893bdbc05636b478932e60c5;hp=49cae7579c391a938e08e55646e100fd8506d398;hb=020d67fb89fcd8799350a46b36982a104e0b2d4c;hpb=c04f8cf44a3b204b82f5f1f5d1ad9dbc738459f1

diff --git a/apps/enc.c b/apps/enc.c
index 49cae7579c..a64c654d4d 100644
--- a/apps/enc.c
+++ b/apps/enc.c
@@ -67,7 +67,7 @@
 #include <openssl/x509.h>
 #include <openssl/rand.h>
 #include <openssl/pem.h>
-#include <openssl/engine.h>
+#include <openssl/comp.h>
 #include <ctype.h>
 
 int set_hex(char *in,unsigned char *out,int size);
@@ -79,7 +79,7 @@ int set_hex(char *in,unsigned char *out,int size);
 #define BSIZE	(8*1024)
 #define	PROG	enc_main
 
-void show_ciphers(const OBJ_NAME *name,void *bio_)
+static void show_ciphers(const OBJ_NAME *name,void *bio_)
 	{
 	BIO *bio=bio_;
 	static int n;
@@ -101,9 +101,11 @@ int MAIN(int, char **);
 
 int MAIN(int argc, char **argv)
 	{
+#ifndef OPENSSL_NO_ENGINE
 	ENGINE *e = NULL;
+#endif
 	static const char magic[]="Salted__";
-	char mbuf[8];	/* should be 1 smaller than magic */
+	char mbuf[sizeof magic-1];
 	char *strbuf=NULL;
 	unsigned char *buff=NULL,*bufsize=NULL;
 	int bsize=BSIZE,verbose=0;
@@ -113,14 +115,23 @@ int MAIN(int argc, char **argv)
 	unsigned char salt[PKCS5_SALT_LEN];
 	char *str=NULL, *passarg = NULL, *pass = NULL;
 	char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
+	char *md=NULL;
 	int enc=1,printkey=0,i,base64=0;
+#ifdef ZLIB
+	int do_zlib=0;
+	BIO *bzl = NULL;
+#endif
 	int debug=0,olb64=0,nosalt=0;
 	const EVP_CIPHER *cipher=NULL,*c;
+	EVP_CIPHER_CTX *ctx = NULL;
 	char *inf=NULL,*outf=NULL;
 	BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
-#define PROG_NAME_SIZE  16
-	char pname[PROG_NAME_SIZE];
+#define PROG_NAME_SIZE  39
+	char pname[PROG_NAME_SIZE+1];
+#ifndef OPENSSL_NO_ENGINE
 	char *engine = NULL;
+#endif
+	const EVP_MD *dgst=NULL;
 
 	apps_startup();
 
@@ -128,13 +139,25 @@ int MAIN(int argc, char **argv)
 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 
+	if (!load_config(bio_err, NULL))
+		goto end;
+
 	/* first check the program name */
-	program_name(argv[0],pname,PROG_NAME_SIZE);
+	program_name(argv[0],pname,sizeof pname);
 	if (strcmp(pname,"base64") == 0)
 		base64=1;
+#ifdef ZLIB
+	if (strcmp(pname,"zlib") == 0)
+		do_zlib=1;
+#endif
 
 	cipher=EVP_get_cipherbyname(pname);
+#ifdef ZLIB
+	if (!do_zlib && !base64 && (cipher == NULL)
+				&& (strcmp(pname,"enc") != 0))
+#else
 	if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
+#endif
 		{
 		BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
 		goto bad;
@@ -161,11 +184,13 @@ int MAIN(int argc, char **argv)
 			if (--argc < 1) goto bad;
 			passarg= *(++argv);
 			}
+#ifndef OPENSSL_NO_ENGINE
 		else if (strcmp(*argv,"-engine") == 0)
 			{
 			if (--argc < 1) goto bad;
 			engine= *(++argv);
 			}
+#endif
 		else if	(strcmp(*argv,"-d") == 0)
 			enc=0;
 		else if	(strcmp(*argv,"-p") == 0)
@@ -188,6 +213,10 @@ int MAIN(int argc, char **argv)
 			base64=1;
 		else if	(strcmp(*argv,"-base64") == 0)
 			base64=1;
+#ifdef ZLIB
+		else if	(strcmp(*argv,"-z") == 0)
+			do_zlib=1;
+#endif
 		else if (strcmp(*argv,"-bufsize") == 0)
 			{
 			if (--argc < 1) goto bad;
@@ -214,7 +243,7 @@ int MAIN(int argc, char **argv)
 				goto bad;
 				}
 			buf[0]='\0';
-			fgets(buf,128,infile);
+			fgets(buf,sizeof buf,infile);
 			fclose(infile);
 			i=strlen(buf);
 			if ((i > 0) &&
@@ -245,6 +274,11 @@ int MAIN(int argc, char **argv)
 			if (--argc < 1) goto bad;
 			hiv= *(++argv);
 			}
+		else if (strcmp(*argv,"-md") == 0)
+			{
+			if (--argc < 1) goto bad;
+			md= *(++argv);
+			}
 		else if	((argv[0][0] == '-') &&
 			((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
 			{
@@ -263,12 +297,18 @@ bad:
 			BIO_printf(bio_err,"%-14s encrypt\n","-e");
 			BIO_printf(bio_err,"%-14s decrypt\n","-d");
 			BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
-			BIO_printf(bio_err,"%-14s key is the next argument\n","-k");
-			BIO_printf(bio_err,"%-14s key is the first line of the file argument\n","-kfile");
+			BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
+			BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
+			BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
+			BIO_printf(bio_err,"%-14s   from a passphrase.  One of md2, md5, sha or sha1\n","");
+			BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S");
 			BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
 			BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
 			BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
+			BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad");
+#ifndef OPENSSL_NO_ENGINE
 			BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
+#endif
 
 			BIO_printf(bio_err,"Cipher Types\n");
 			OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
@@ -282,7 +322,20 @@ bad:
 		argv++;
 		}
 
+#ifndef OPENSSL_NO_ENGINE
         e = setup_engine(bio_err, engine, 0);
+#endif
+
+	if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
+		{
+		BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
+		goto end;
+		}
+
+	if (dgst == NULL)
+		{
+		dgst = EVP_md5();
+		}
 
 	if (bufsize != NULL)
 		{
@@ -307,7 +360,7 @@ bad:
 			}
 
 		/* It must be large enough for a base64 encoded line */
-		if (n < 80) n=80;
+		if (base64 && n < 80) n=80;
 
 		bsize=(int)n;
 		if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
@@ -332,12 +385,16 @@ bad:
 		{
 		BIO_set_callback(in,BIO_debug_callback);
 		BIO_set_callback(out,BIO_debug_callback);
-		BIO_set_callback_arg(in,bio_err);
-		BIO_set_callback_arg(out,bio_err);
+		BIO_set_callback_arg(in,(char *)bio_err);
+		BIO_set_callback_arg(out,(char *)bio_err);
 		}
 
 	if (inf == NULL)
+	        {
+		if (bufsize != NULL)
+			setvbuf(stdin, (char *)NULL, _IONBF, 0);
 		BIO_set_fp(in,stdin,BIO_NOCLOSE);
+	        }
 	else
 		{
 		if (BIO_read_filename(in,inf) <= 0)
@@ -361,9 +418,9 @@ bad:
 			{
 			char buf[200];
 
-			sprintf(buf,"enter %s %s password:",
-				OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
-				(enc)?"encryption":"decryption");
+			BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
+				     OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
+				     (enc)?"encryption":"decryption");
 			strbuf[0]='\0';
 			i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
 			if (i == 0)
@@ -388,6 +445,8 @@ bad:
 	if (outf == NULL)
 		{
 		BIO_set_fp(out,stdout,BIO_NOCLOSE);
+		if (bufsize != NULL)
+			setvbuf(stdout, (char *)NULL, _IONBF, 0);
 #ifdef OPENSSL_SYS_VMS
 		{
 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
@@ -407,6 +466,19 @@ bad:
 	rbio=in;
 	wbio=out;
 
+#ifdef ZLIB
+
+	if (do_zlib)
+		{
+		if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
+			goto end;
+		if (enc)
+			wbio=BIO_push(bzl,wbio);
+		else
+			rbio=BIO_push(bzl,rbio);
+		}
+#endif
+
 	if (base64)
 		{
 		if ((b64=BIO_new(BIO_f_base64())) == NULL)
@@ -414,7 +486,7 @@ bad:
 		if (debug)
 			{
 			BIO_set_callback(b64,BIO_debug_callback);
-			BIO_set_callback_arg(b64,bio_err);
+			BIO_set_callback_arg(b64,(char *)bio_err);
 			}
 		if (olb64)
 			BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
@@ -440,12 +512,12 @@ bad:
 			else {
 				if(enc) {
 					if(hsalt) {
-						if(!set_hex(hsalt,salt,PKCS5_SALT_LEN)) {
+						if(!set_hex(hsalt,salt,sizeof salt)) {
 							BIO_printf(bio_err,
 								"invalid hex salt value\n");
 							goto end;
 						}
-					} else if (RAND_pseudo_bytes(salt, PKCS5_SALT_LEN) < 0)
+					} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
 						goto end;
 					/* If -P option then don't bother writing */
 					if((printkey != 2)
@@ -453,14 +525,14 @@ bad:
 							 sizeof magic-1) != sizeof magic-1
 					       || BIO_write(wbio,
 							    (char *)salt,
-							    PKCS5_SALT_LEN) != PKCS5_SALT_LEN)) {
+							    sizeof salt) != sizeof salt)) {
 						BIO_printf(bio_err,"error writing output file\n");
 						goto end;
 					}
 				} else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
 					  || BIO_read(rbio,
 						      (unsigned char *)salt,
-				    PKCS5_SALT_LEN) != PKCS5_SALT_LEN) {
+				    sizeof salt) != sizeof salt) {
 					BIO_printf(bio_err,"error reading input file\n");
 					goto end;
 				} else if(memcmp(mbuf,magic,sizeof magic-1)) {
@@ -471,7 +543,7 @@ bad:
 				sptr = salt;
 			}
 
-			EVP_BytesToKey(cipher,EVP_md5(),sptr,
+			EVP_BytesToKey(cipher,dgst,sptr,
 				(unsigned char *)str,
 				strlen(str),1,key,iv);
 			/* zero the complete buffer or the string
@@ -479,15 +551,23 @@ bad:
 			 * bug picked up by
 			 * Larry J. Hughes Jr. <hughes@indiana.edu> */
 			if (str == strbuf)
-				memset(str,0,SIZE);
+				OPENSSL_cleanse(str,SIZE);
 			else
-				memset(str,0,strlen(str));
+				OPENSSL_cleanse(str,strlen(str));
 			}
 		if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
 			{
 			BIO_printf(bio_err,"invalid hex iv value\n");
 			goto end;
 			}
+		if ((hiv == NULL) && (str == NULL))
+			{
+			/* No IV was explicitly set and no IV was generated
+			 * during EVP_BytesToKey. Hence the IV is undefined,
+			 * making correct decryption impossible. */
+			BIO_printf(bio_err, "iv undefined\n");
+			goto end;
+			}
 		if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
 			{
 			BIO_printf(bio_err,"invalid hex key value\n");
@@ -496,17 +576,35 @@ bad:
 
 		if ((benc=BIO_new(BIO_f_cipher())) == NULL)
 			goto end;
-		BIO_set_cipher(benc,cipher,key,iv,enc);
-		if (nopad)
+
+		/* Since we may be changing parameters work on the encryption
+		 * context rather than calling BIO_set_cipher().
+		 */
+
+		BIO_get_cipher_ctx(benc, &ctx);
+		if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
 			{
-			EVP_CIPHER_CTX *ctx;
-			BIO_get_cipher_ctx(benc, &ctx);
+			BIO_printf(bio_err, "Error setting cipher %s\n",
+				EVP_CIPHER_name(cipher));
+			ERR_print_errors(bio_err);
+			goto end;
+			}
+
+		if (nopad)
 			EVP_CIPHER_CTX_set_padding(ctx, 0);
+
+		if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
+			{
+			BIO_printf(bio_err, "Error setting cipher %s\n",
+				EVP_CIPHER_name(cipher));
+			ERR_print_errors(bio_err);
+			goto end;
 			}
+
 		if (debug)
 			{
 			BIO_set_callback(benc,BIO_debug_callback);
-			BIO_set_callback_arg(benc,bio_err);
+			BIO_set_callback_arg(benc,(char *)bio_err);
 			}
 
 		if (printkey)
@@ -514,7 +612,7 @@ bad:
 			if (!nosalt)
 				{
 				printf("salt=");
-				for (i=0; i<PKCS5_SALT_LEN; i++)
+				for (i=0; i<(int)sizeof(salt); i++)
 					printf("%02X",salt[i]);
 				printf("\n");
 				}
@@ -574,9 +672,12 @@ end:
 	if (out != NULL) BIO_free_all(out);
 	if (benc != NULL) BIO_free(benc);
 	if (b64 != NULL) BIO_free(b64);
+#ifdef ZLIB
+	if (bzl != NULL) BIO_free(bzl);
+#endif
 	if(pass) OPENSSL_free(pass);
 	apps_shutdown();
-	EXIT(ret);
+	OPENSSL_EXIT(ret);
 	}
 
 int set_hex(char *in, unsigned char *out, int size)