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openssl/crypto/pkcs7/pk7_lib.c

Index: openssl/crypto/pkcs7/pk7_lib.c
===================================================================
--- openssl/crypto/pkcs7/pk7_lib.c	(revision 105093)
+++ openssl/crypto/pkcs7/pk7_lib.c	(working copy)
@@ -60,6 +60,7 @@
 #include "cryptlib.h"
 #include <openssl/objects.h>
 #include <openssl/x509.h>
+#include "asn1_locl.h"
 
 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
 	{
@@ -314,7 +315,7 @@
 		*sk=sk_X509_new_null();
 	if (*sk == NULL)
 		{
-		PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,ERR_R_MALLOC_FAILURE);
+		PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE, ERR_R_MALLOC_FAILURE);
 		return 0;
 		}
 	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
@@ -365,13 +366,8 @@
 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 	     const EVP_MD *dgst)
 	{
-	int nid;
-	char is_dsa;
+	int ret;
 
-	if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
-		is_dsa = 1;
-	else
-		is_dsa = 0;
 	/* We now need to add another PKCS7_SIGNER_INFO entry */
 	if (!ASN1_INTEGER_set(p7i->version,1))
 		goto err;
@@ -391,65 +387,55 @@
 	p7i->pkey=pkey;
 
 	/* Set the algorithms */
-	if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
-	else	
-		p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 
-	if (p7i->digest_alg->parameter != NULL)
-		ASN1_TYPE_free(p7i->digest_alg->parameter);
-	if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
-		goto err;
-	p7i->digest_alg->parameter->type=V_ASN1_NULL;
+	X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)),
+				V_ASN1_NULL, NULL);
 
-	if (p7i->digest_enc_alg->parameter != NULL)
-		ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
-	nid = EVP_PKEY_type(pkey->type);
-	if (nid == EVP_PKEY_RSA)
+	if (pkey->ameth && pkey->ameth->pkey_ctrl)
 		{
-		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
-		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
-			goto err;
-		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
+		ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN,
+						0, p7i);
+		if (ret > 0)
+			return 1;
+		if (ret != -2)
+			{
+			PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
+					PKCS7_R_SIGNING_CTRL_FAILURE);
+			return 0;
+			}
 		}
-	else if (nid == EVP_PKEY_DSA)
-		{
-#if 1
-		/* use 'dsaEncryption' OID for compatibility with other software
-		 * (PKCS #7 v1.5 does specify how to handle DSA) ... */
-		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
-#else
-		/* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
-		 * would make more sense. */
-		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
-#endif
-		p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
-		}
-	else if (nid == EVP_PKEY_EC)
-		{
-		p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
-		if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
-			goto err;
-		p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
-		}
-	else
-		return(0);
-
-	return(1);
+	PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
+			PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 err:
-	return(0);
+	return 0;
 	}
 
 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 	     const EVP_MD *dgst)
 	{
-	PKCS7_SIGNER_INFO *si;
+	PKCS7_SIGNER_INFO *si = NULL;
 
+	if (dgst == NULL)
+		{
+		int def_nid;
+		if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
+			goto err;
+		dgst = EVP_get_digestbynid(def_nid);
+		if (dgst == NULL)
+			{
+			PKCS7err(PKCS7_F_PKCS7_ADD_SIGNATURE,
+						PKCS7_R_NO_DEFAULT_DIGEST);
+			goto err;
+			}
+		}
+
 	if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 	if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 	if (!PKCS7_add_signer(p7,si)) goto err;
 	return(si);
 err:
-	PKCS7_SIGNER_INFO_free(si);
+	if (si)
+		PKCS7_SIGNER_INFO_free(si);
 	return(NULL);
 	}
 
@@ -485,6 +471,23 @@
 		return(NULL);
 	}
 
+void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
+					X509_ALGOR **pdig, X509_ALGOR **psig)
+	{
+	if (pk)
+		*pk = si->pkey;
+	if (pdig)
+		*pdig = si->digest_alg;
+	if (psig)
+		*psig = si->digest_enc_alg;
+	}
+
+void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
+	{
+	if (penc)
+		*penc = ri->key_enc_algor;
+	}
+
 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 	{
 	PKCS7_RECIP_INFO *ri;
@@ -492,10 +495,11 @@
 	if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 	if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 	if (!PKCS7_add_recipient_info(p7,ri)) goto err;
-	return(ri);
+	return ri;
 err:
-	PKCS7_RECIP_INFO_free(ri);
-	return(NULL);
+	if (ri)
+		PKCS7_RECIP_INFO_free(ri);
+	return NULL;
 	}
 
 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
@@ -524,6 +528,8 @@
 
 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 	{
+	int ret;
+	EVP_PKEY *pkey = NULL;
 	if (!ASN1_INTEGER_set(p7i->version,0))
 		return 0;
 	if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
@@ -535,14 +541,41 @@
 		M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 		return 0;
 
-	X509_ALGOR_free(p7i->key_enc_algor);
-	if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
-		return 0;
+	pkey = X509_get_pubkey(x509);
 
+	if (!pkey || !pkey->ameth || !pkey->ameth->pkey_ctrl)
+		{
+		PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
+			PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+		goto err;
+		}
+
+	ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT,
+						0, p7i);
+	if (ret == -2)
+		{
+		PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
+			PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+		goto err;
+		}
+	if (ret <= 0)
+		{
+		PKCS7err(PKCS7_F_PKCS7_RECIP_INFO_SET,
+				PKCS7_R_ENCRYPTION_CTRL_FAILURE);
+		goto err;
+		}
+
+	EVP_PKEY_free(pkey);
+
 	CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 	p7i->cert=x509;
 
-	return(1);
+	return 1;
+
+	err:
+	if (pkey)
+		EVP_PKEY_free(pkey);
+	return 0;
 	}
 
 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
@@ -558,7 +591,6 @@
 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 	{
 	int i;
-	ASN1_OBJECT *objtmp;
 	PKCS7_ENC_CONTENT *ec;
 
 	i=OBJ_obj2nid(p7->type);
@@ -581,9 +613,53 @@
 		PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 		return(0);
 	}
-	objtmp = OBJ_nid2obj(i);
 
 	ec->cipher = cipher;
 	return 1;
 	}
 
+int PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
+	{
+	ASN1_OCTET_STRING *os = NULL;
+
+	switch (OBJ_obj2nid(p7->type))
+		{
+		case NID_pkcs7_data:
+		os = p7->d.data;
+		break;
+
+		case NID_pkcs7_signedAndEnveloped:
+		os = p7->d.signed_and_enveloped->enc_data->enc_data;
+		if (os == NULL)
+			{
+			os=M_ASN1_OCTET_STRING_new();
+			p7->d.signed_and_enveloped->enc_data->enc_data=os;
+			}
+		break;
+
+		case NID_pkcs7_enveloped:
+		os = p7->d.enveloped->enc_data->enc_data;
+		if (os == NULL)
+			{
+			os=M_ASN1_OCTET_STRING_new();
+			p7->d.enveloped->enc_data->enc_data=os;
+			}
+		break;
+
+		case NID_pkcs7_signed:
+		os=p7->d.sign->contents->d.data;
+		break;
+
+		default:
+		os = NULL;
+		break;
+		}
+	
+	if (os == NULL)
+		return 0;
+
+	os->flags |= ASN1_STRING_FLAG_NDEF;
+	*boundary = &os->data;
+
+	return 1;
+	}