X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fpkcs7%2Fpk7_smime.c;h=a5104f8d05af7d826c5dd4c01e52ae3b9294499e;hb=4672acfa7d56a38daef2415ec2c5bc5e1f00f49e;hp=c8cd5a7f73eb370ecd3c6f9d3c55b4f1e5b599dd;hpb=f50c11ca40132a556880d11172694dfec6b90ad2;p=oweals%2Fopenssl.git

diff --git a/crypto/pkcs7/pk7_smime.c b/crypto/pkcs7/pk7_smime.c
index c8cd5a7f73..a5104f8d05 100644
--- a/crypto/pkcs7/pk7_smime.c
+++ b/crypto/pkcs7/pk7_smime.c
@@ -1,9 +1,9 @@
 /* pk7_smime.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
  */
 /* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2004 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
@@ -63,86 +63,205 @@
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 
+static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
+
 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 		  BIO *data, int flags)
 {
 	PKCS7 *p7;
-	PKCS7_SIGNER_INFO *si;
-	BIO *p7bio;
-	STACK_OF(X509_ALGOR) *smcap;
 	int i;
 
-	if(!X509_check_private_key(signcert, pkey)) {
-		PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
-                return NULL;
-	}
-
-	if(!(p7 = PKCS7_new())) {
+	if(!(p7 = PKCS7_new()))
+		{
 		PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
 		return NULL;
-	}
+		}
 
-	PKCS7_set_type(p7, NID_pkcs7_signed);
+	if (!PKCS7_set_type(p7, NID_pkcs7_signed))
+		goto err;
 
-	PKCS7_content_new(p7, NID_pkcs7_data);
+	if (!PKCS7_content_new(p7, NID_pkcs7_data))
+		goto err;
+
+    	if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags))
+		{
+		PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
+		goto err;
+		}
+
+	if(!(flags & PKCS7_NOCERTS))
+		{
+		for(i = 0; i < sk_X509_num(certs); i++)
+			{
+			if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
+				goto err;
+			}
+		}
+
+	if(flags & PKCS7_DETACHED)
+		PKCS7_set_detached(p7, 1);
+
+	if (flags & (PKCS7_STREAM|PKCS7_PARTIAL))
+		return p7;
+
+	if (PKCS7_final(p7, data, flags))
+		return p7;
+
+	err:
+	PKCS7_free(p7);
+	return NULL;
+}
+
+int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
+	{
+	BIO *p7bio;
+	int ret = 0;
+	if (!(p7bio = PKCS7_dataInit(p7, NULL)))
+		{
+		PKCS7err(PKCS7_F_PKCS7_FINAL,ERR_R_MALLOC_FAILURE);
+		return 0;
+		}
+
+	SMIME_crlf_copy(data, p7bio, flags);
+
+	(void)BIO_flush(p7bio);
+
+
+        if (!PKCS7_dataFinal(p7,p7bio))
+		{
+		PKCS7err(PKCS7_F_PKCS7_FINAL,PKCS7_R_PKCS7_DATASIGN);
+		goto err;
+		}
+
+	ret = 1;
+
+	err:
+	BIO_free_all(p7bio);
+
+	return ret;
 
-    	if (!(si = PKCS7_add_signature(p7,signcert,pkey,EVP_sha1()))) {
-		PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
-		return NULL;
 	}
 
-	if(!(flags & PKCS7_NOCERTS)) {
-		PKCS7_add_certificate(p7, signcert);
-		if(certs) for(i = 0; i < sk_X509_num(certs); i++)
-			PKCS7_add_certificate(p7, sk_X509_value(certs, i));
+/* Check to see if a cipher exists and if so add S/MIME capabilities */
+
+static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
+	{
+	if (EVP_get_cipherbynid(nid))
+		return PKCS7_simple_smimecap(sk, nid, arg);
+	return 1;
 	}
 
-	if(!(p7bio = PKCS7_dataInit(p7, NULL))) {
-		PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
-		return NULL;
+static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
+	{
+	if (EVP_get_digestbynid(nid))
+		return PKCS7_simple_smimecap(sk, nid, arg);
+	return 1;
 	}
 
+PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
+					EVP_PKEY *pkey, const EVP_MD *md,
+					int flags)
+	{
+	PKCS7_SIGNER_INFO *si = NULL;
+	STACK_OF(X509_ALGOR) *smcap = NULL;
+	if(!X509_check_private_key(signcert, pkey))
+		{
+		PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+			PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
+                return NULL;
+		}
+
+    	if (!(si = PKCS7_add_signature(p7,signcert,pkey, md)))
+		{
+		PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+				PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
+		return NULL;
+		}
 
-	SMIME_crlf_copy(data, p7bio, flags);
+	if(!(flags & PKCS7_NOCERTS))
+		{
+		if (!PKCS7_add_certificate(p7, signcert))
+			goto err;
+		}
 
-	if(!(flags & PKCS7_NOATTR)) {
-		PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
-				V_ASN1_OBJECT, OBJ_nid2obj(NID_pkcs7_data));
+	if(!(flags & PKCS7_NOATTR))
+		{
+		if (!PKCS7_add_attrib_content_type(si, NULL))
+			goto err;
 		/* Add SMIMECapabilities */
 		if(!(flags & PKCS7_NOSMIMECAP))
-		{
-		if(!(smcap = sk_X509_ALGOR_new(NULL))) {
-			PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
-			return NULL;
+			{
+			if(!(smcap = sk_X509_ALGOR_new_null()))
+				{
+				PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+					ERR_R_MALLOC_FAILURE);
+				goto err;
+				}
+			if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
+			|| !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
+			|| !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
+				|| !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
+				|| !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
+			|| !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
+				|| !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
+				|| !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
+				|| !add_cipher_smcap(smcap, NID_des_cbc, -1)
+				|| !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
+				|| !PKCS7_add_attrib_smimecap (si, smcap))
+				goto err;
+			sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
+			smcap = NULL;
+			}
+		if (flags & PKCS7_REUSE_DIGEST)
+			{
+			if (!pkcs7_copy_existing_digest(p7, si))
+				goto err;
+			if (!(flags & PKCS7_PARTIAL) &&
+					!PKCS7_SIGNER_INFO_sign(si))
+				goto err;
+			}
 		}
-#ifndef NO_DES
-		PKCS7_simple_smimecap (smcap, NID_des_ede3_cbc, -1);
-#endif
-#ifndef NO_RC2
-		PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 128);
-		PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 64);
-#endif
-#ifndef NO_DES
-		PKCS7_simple_smimecap (smcap, NID_des_cbc, -1);
-#endif
-#ifndef NO_RC2
-		PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 40);
-#endif
-		PKCS7_add_attrib_smimecap (si, smcap);
+	return si;
+	err:
+	if (smcap)
 		sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
-		}
+	return NULL;
 	}
 
-	if(flags & PKCS7_DETACHED)PKCS7_set_detached(p7, 1);
+/* Search for a digest matching SignerInfo digest type and if found
+ * copy across.
+ */
 
-        if (!PKCS7_dataFinal(p7,p7bio)) {
-		PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_DATASIGN);
-		return NULL;
-	}
+static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
+	{
+	int i;
+	STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+	PKCS7_SIGNER_INFO *sitmp;
+	ASN1_OCTET_STRING *osdig = NULL;
+	sinfos = PKCS7_get_signer_info(p7);
+	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
+		{
+		sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
+		if (si == sitmp)
+			break;
+		if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
+			continue;
+		if (!OBJ_cmp(si->digest_alg->algorithm,
+				sitmp->digest_alg->algorithm))
+			{
+			osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
+			break;
+			}
 
-        BIO_free_all(p7bio);
-	return p7;
-}
+		}
+
+	if (osdig)
+		return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
+
+	PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
+			PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
+	return 0;
+	}
 
 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 					BIO *indata, BIO *out, int flags)
@@ -153,9 +272,9 @@ int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 	PKCS7_SIGNER_INFO *si;
 	X509_STORE_CTX cert_ctx;
 	char buf[4096];
-	int i, j=0, k;
+	int i, j=0, k, ret = 0;
 	BIO *p7bio;
-	BIO *tmpout;
+	BIO *tmpin, *tmpout;
 
 	if(!p7) {
 		PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_INVALID_NULL_POINTER);
@@ -172,12 +291,17 @@ int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 		PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT);
 		return 0;
 	}
+#if 0
+	/* NB: this test commented out because some versions of Netscape
+	 * illegally include zero length content when signing data.
+	 */
 
 	/* Check for data and content: two sets of data */
 	if(!PKCS7_get_detached(p7) && indata) {
 				PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AND_DATA_PRESENT);
 		return 0;
 	}
+#endif
 
 	sinfos = PKCS7_get_signer_info(p7);
 
@@ -196,11 +320,21 @@ int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 	if (!(flags & PKCS7_NOVERIFY)) for (k = 0; k < sk_X509_num(signers); k++) {
 		signer = sk_X509_value (signers, k);
 		if (!(flags & PKCS7_NOCHAIN)) {
-			X509_STORE_CTX_init(&cert_ctx, store, signer,
-							p7->d.sign->cert);
-			X509_STORE_CTX_set_purpose(&cert_ctx,
-						X509_PURPOSE_SMIME_SIGN);
-		} else X509_STORE_CTX_init (&cert_ctx, store, signer, NULL);
+			if(!X509_STORE_CTX_init(&cert_ctx, store, signer,
+							p7->d.sign->cert))
+				{
+				PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
+				sk_X509_free(signers);
+				return 0;
+				}
+			X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
+		} else if(!X509_STORE_CTX_init (&cert_ctx, store, signer, NULL)) {
+			PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
+			sk_X509_free(signers);
+			return 0;
+		}
+		if (!(flags & PKCS7_NOCRL))
+			X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
 		i = X509_verify_cert(&cert_ctx);
 		if (i <= 0) j = X509_STORE_CTX_get_error(&cert_ctx);
 		X509_STORE_CTX_cleanup(&cert_ctx);
@@ -214,13 +348,38 @@ int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 		/* Check for revocation status here */
 	}
 
-	p7bio=PKCS7_dataInit(p7,indata);
+	/* Performance optimization: if the content is a memory BIO then
+	 * store its contents in a temporary read only memory BIO. This
+	 * avoids potentially large numbers of slow copies of data which will
+	 * occur when reading from a read write memory BIO when signatures
+	 * are calculated.
+	 */
+
+	if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM))
+		{
+		char *ptr;
+		long len;
+		len = BIO_get_mem_data(indata, &ptr);
+		tmpin = BIO_new_mem_buf(ptr, len);
+		if (tmpin == NULL)
+			{
+			PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
+			return 0;
+			}
+		}
+	else
+		tmpin = indata;
+		
+
+	if (!(p7bio=PKCS7_dataInit(p7,tmpin)))
+		goto err;
 
 	if(flags & PKCS7_TEXT) {
 		if(!(tmpout = BIO_new(BIO_s_mem()))) {
 			PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
 			goto err;
 		}
+		BIO_set_mem_eof_return(tmpout, 0);
 	} else tmpout = out;
 
 	/* We now have to 'read' from p7bio to calculate digests etc. */
@@ -253,18 +412,19 @@ int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
 		}
 	}
 
-	sk_X509_free(signers);
-	if(indata) BIO_pop(p7bio);
-	BIO_free_all(p7bio);
-
-	return 1;
+	ret = 1;
 
 	err:
+	
+	if (tmpin == indata)
+		{
+		if (indata) BIO_pop(p7bio);
+		}
+	BIO_free_all(p7bio);
 
 	sk_X509_free(signers);
-	BIO_free(p7bio);
 
-	return 0;
+	return ret;
 }
 
 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
@@ -285,10 +445,6 @@ STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
 		PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE);
 		return NULL;
 	}
-	if(!(signers = sk_X509_new(NULL))) {
-		PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
-		return NULL;
-	}
 
 	/* Collect all the signers together */
 
@@ -299,6 +455,11 @@ STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
 		return 0;
 	}
 
+	if(!(signers = sk_X509_new_null())) {
+		PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
+		return NULL;
+	}
+
 	for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
 	{
 	    si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
@@ -317,7 +478,10 @@ STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
 			return 0;
 	    }
 
-	    sk_X509_push(signers, signer);
+	    if (!sk_X509_push(signers, signer)) {
+		sk_X509_free(signers);
+		return NULL;
+	    }
 	}
 	return signers;
 }
@@ -325,7 +489,7 @@ STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
 
 /* Build a complete PKCS#7 enveloped data */
 
-PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, EVP_CIPHER *cipher,
+PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
 								int flags)
 {
 	PKCS7 *p7;
@@ -337,8 +501,9 @@ PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, EVP_CIPHER *cipher,
 		return NULL;
 	}
 
-	PKCS7_set_type(p7, NID_pkcs7_enveloped);
-	if(!PKCS7_set_cipher(p7, cipher)) {
+	if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
+		goto err;
+	if (!PKCS7_set_cipher(p7, cipher)) {
 		PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_ERROR_SETTING_CIPHER);
 		goto err;
 	}
@@ -352,26 +517,15 @@ PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, EVP_CIPHER *cipher,
 		}
 	}
 
-	if(!(p7bio = PKCS7_dataInit(p7, NULL))) {
-		PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE);
-		goto err;
-	}
-
-	SMIME_crlf_copy(in, p7bio, flags);
-
-	BIO_flush(p7bio);
-
-        if (!PKCS7_dataFinal(p7,p7bio)) {
-		PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_PKCS7_DATAFINAL_ERROR);
-		goto err;
-	}
-        BIO_free_all(p7bio);
+	if (flags & PKCS7_STREAM)
+		return p7;
 
-	return p7;
+	if (PKCS7_final(p7, in, flags))
+		return p7;
 
 	err:
 
-	BIO_free(p7bio);
+	BIO_free_all(p7bio);
 	PKCS7_free(p7);
 	return NULL;
 
@@ -393,7 +547,7 @@ int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
 		return 0;
 	}
 
-	if(!X509_check_private_key(cert, pkey)) {
+	if(cert && !X509_check_private_key(cert, pkey)) {
 		PKCS7err(PKCS7_F_PKCS7_DECRYPT,
 				PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
 		return 0;
@@ -409,22 +563,44 @@ int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
 		/* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
 		if(!(tmpbuf = BIO_new(BIO_f_buffer()))) {
 			PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
+			BIO_free_all(tmpmem);
 			return 0;
 		}
 		if(!(bread = BIO_push(tmpbuf, tmpmem))) {
 			PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
+			BIO_free_all(tmpbuf);
+			BIO_free_all(tmpmem);
 			return 0;
 		}
 		ret = SMIME_text(bread, data);
+		if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER)
+			{
+			if (!BIO_get_cipher_status(tmpmem))
+				ret = 0;
+			}
 		BIO_free_all(bread);
 		return ret;
 	} else {
 		for(;;) {
 			i = BIO_read(tmpmem, buf, sizeof(buf));
-			if(i <= 0) break;
-			BIO_write(data, buf, i);
+			if(i <= 0)
+				{
+				ret = 1;
+				if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER)
+					{
+					if (!BIO_get_cipher_status(tmpmem))
+						ret = 0;
+					}
+					
+				break;
+				}
+			if (BIO_write(data, buf, i) != i)
+				{
+				ret = 0;
+				break;
+				}
 		}
 		BIO_free_all(tmpmem);
-		return 1;
+		return ret;
 	}
 }