Signed receipt generation code.

5 files changed, 158 insertions, 0 deletions

diff --git a/crypto/cms/cms.h b/crypto/cms/cms.h
index 22baa3e837..19fde29e93 100644
--- a/crypto/cms/cms.h
+++ b/crypto/cms/cms.h
@@ -140,6 +140,11 @@ int CMS_final(CMS_ContentInfo *cms, BIO *data, int flags);
 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 						BIO *data, unsigned int flags);
 
+CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
+					X509 *signcert, EVP_PKEY *pkey,
+					STACK_OF(X509) *certs,
+					unsigned int flags);
+
 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags);
 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags);
 
@@ -342,6 +347,7 @@ void ERR_load_CMS_strings(void);
 #define CMS_F_CMS_DIGESTALGORITHM_INIT_BIO		 116
 #define CMS_F_CMS_DIGESTEDDATA_DO_FINAL			 117
 #define CMS_F_CMS_DIGEST_VERIFY				 118
+#define CMS_F_CMS_ENCODE_RECEIPT			 161
 #define CMS_F_CMS_ENCRYPT				 119
 #define CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO		 120
 #define CMS_F_CMS_ENCRYPTEDDATA_DECRYPT			 121
@@ -357,6 +363,7 @@ void ERR_load_CMS_strings(void);
 #define CMS_F_CMS_GET0_ENVELOPED			 131
 #define CMS_F_CMS_GET0_REVOCATION_CHOICES		 132
 #define CMS_F_CMS_GET0_SIGNED				 133
+#define CMS_F_CMS_MSGSIGDIGEST_ADD1			 162
 #define CMS_F_CMS_RECEIPTREQUEST_CREATE0		 159
 #define CMS_F_CMS_RECEIPT_VERIFY			 160
 #define CMS_F_CMS_RECIPIENTINFO_DECRYPT			 134
@@ -380,6 +387,7 @@ void ERR_load_CMS_strings(void);
 #define CMS_F_CMS_SIGNERINFO_VERIFY			 152
 #define CMS_F_CMS_SIGNERINFO_VERIFY_CERT		 153
 #define CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT		 154
+#define CMS_F_CMS_SIGN_RECEIPT				 163
 #define CMS_F_CMS_STREAM				 155
 #define CMS_F_CMS_UNCOMPRESS				 156
 #define CMS_F_CMS_VERIFY				 157
@@ -427,6 +435,7 @@ void ERR_load_CMS_strings(void);
 #define CMS_R_NO_DEFAULT_DIGEST				 128
 #define CMS_R_NO_DIGEST_SET				 129
 #define CMS_R_NO_KEY					 130
+#define CMS_R_NO_KEY_OR_CERT				 174
 #define CMS_R_NO_MATCHING_DIGEST			 131
 #define CMS_R_NO_MATCHING_RECIPIENT			 132
 #define CMS_R_NO_MATCHING_SIGNATURE			 166
diff --git a/crypto/cms/cms_err.c b/crypto/cms/cms_err.c
index 420a401770..9c813e5db6 100644
--- a/crypto/cms/cms_err.c
+++ b/crypto/cms/cms_err.c
@@ -91,6 +91,7 @@ static ERR_STRING_DATA CMS_str_functs[]=
 {ERR_FUNC(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO),	"CMS_DIGESTALGORITHM_INIT_BIO"},
 {ERR_FUNC(CMS_F_CMS_DIGESTEDDATA_DO_FINAL),	"CMS_DIGESTEDDATA_DO_FINAL"},
 {ERR_FUNC(CMS_F_CMS_DIGEST_VERIFY),	"CMS_digest_verify"},
+{ERR_FUNC(CMS_F_CMS_ENCODE_RECEIPT),	"CMS_ENCODE_RECEIPT"},
 {ERR_FUNC(CMS_F_CMS_ENCRYPT),	"CMS_encrypt"},
 {ERR_FUNC(CMS_F_CMS_ENCRYPTEDCONTENT_INIT_BIO),	"CMS_ENCRYPTEDCONTENT_INIT_BIO"},
 {ERR_FUNC(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT),	"CMS_EncryptedData_decrypt"},
@@ -106,6 +107,7 @@ static ERR_STRING_DATA CMS_str_functs[]=
 {ERR_FUNC(CMS_F_CMS_GET0_ENVELOPED),	"CMS_GET0_ENVELOPED"},
 {ERR_FUNC(CMS_F_CMS_GET0_REVOCATION_CHOICES),	"CMS_GET0_REVOCATION_CHOICES"},
 {ERR_FUNC(CMS_F_CMS_GET0_SIGNED),	"CMS_GET0_SIGNED"},
+{ERR_FUNC(CMS_F_CMS_MSGSIGDIGEST_ADD1),	"CMS_MSGSIGDIGEST_ADD1"},
 {ERR_FUNC(CMS_F_CMS_RECEIPTREQUEST_CREATE0),	"CMS_ReceiptRequest_create0"},
 {ERR_FUNC(CMS_F_CMS_RECEIPT_VERIFY),	"CMS_RECEIPT_VERIFY"},
 {ERR_FUNC(CMS_F_CMS_RECIPIENTINFO_DECRYPT),	"CMS_RecipientInfo_decrypt"},
@@ -129,6 +131,7 @@ static ERR_STRING_DATA CMS_str_functs[]=
 {ERR_FUNC(CMS_F_CMS_SIGNERINFO_VERIFY),	"CMS_SignerInfo_verify"},
 {ERR_FUNC(CMS_F_CMS_SIGNERINFO_VERIFY_CERT),	"CMS_SIGNERINFO_VERIFY_CERT"},
 {ERR_FUNC(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT),	"CMS_SignerInfo_verify_content"},
+{ERR_FUNC(CMS_F_CMS_SIGN_RECEIPT),	"CMS_SIGN_RECEIPT"},
 {ERR_FUNC(CMS_F_CMS_STREAM),	"CMS_stream"},
 {ERR_FUNC(CMS_F_CMS_UNCOMPRESS),	"CMS_uncompress"},
 {ERR_FUNC(CMS_F_CMS_VERIFY),	"CMS_verify"},
@@ -179,6 +182,7 @@ static ERR_STRING_DATA CMS_str_reasons[]=
 {ERR_REASON(CMS_R_NO_DEFAULT_DIGEST)     ,"no default digest"},
 {ERR_REASON(CMS_R_NO_DIGEST_SET)         ,"no digest set"},
 {ERR_REASON(CMS_R_NO_KEY)                ,"no key"},
+{ERR_REASON(CMS_R_NO_KEY_OR_CERT)        ,"no key or cert"},
 {ERR_REASON(CMS_R_NO_MATCHING_DIGEST)    ,"no matching digest"},
 {ERR_REASON(CMS_R_NO_MATCHING_RECIPIENT) ,"no matching recipient"},
 {ERR_REASON(CMS_R_NO_MATCHING_SIGNATURE) ,"no matching signature"},
diff --git a/crypto/cms/cms_ess.c b/crypto/cms/cms_ess.c
index ff9b2a86f2..b2ff4fc595 100644
--- a/crypto/cms/cms_ess.c
+++ b/crypto/cms/cms_ess.c
@@ -190,6 +190,8 @@ void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr,
 		*prto = rr->receiptsTo;
 	}
 
+/* Digest a SignerInfo structure for msgSigDigest attribute processing */
+
 static int cms_msgSigDigest(CMS_SignerInfo *si,
 				unsigned char *dig, unsigned int *diglen)
 	{
@@ -203,6 +205,26 @@ static int cms_msgSigDigest(CMS_SignerInfo *si,
 	return 1;
 	}
 
+/* Add a msgSigDigest attribute to a SignerInfo */
+
+int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src)
+	{
+	unsigned char dig[EVP_MAX_MD_SIZE];
+	unsigned int diglen;
+	if (!cms_msgSigDigest(src, dig, &diglen))
+		{
+		CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, CMS_R_MSGSIGDIGEST_ERROR);
+		return 0;
+		}
+	if (!CMS_signed_add1_attr_by_NID(dest, NID_id_smime_aa_msgSigDigest,
+					V_ASN1_OCTET_STRING, dig, diglen))
+		{
+		CMSerr(CMS_F_CMS_MSGSIGDIGEST_ADD1, ERR_R_MALLOC_FAILURE);
+		return 0;
+		}
+	return 1;
+	}
+
 /* Verify signed receipt after it has already passed normal CMS verify */
 
 int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
@@ -348,3 +370,52 @@ int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms)
 	return r;
 
 	}
+
+/* Encode a Receipt into an OCTET STRING read for including into content of
+ * a SignedData ContentInfo.
+ */
+
+ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si)
+	{
+	CMS_Receipt rct;
+	CMS_ReceiptRequest *rr = NULL;
+	ASN1_OBJECT *ctype;
+	ASN1_OCTET_STRING *os = NULL;
+
+	/* Get original receipt request */
+
+	/* Get original receipt request details */
+
+	if (!CMS_get1_ReceiptRequest(si, &rr))
+		{
+		CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_RECEIPT_REQUEST);
+		goto err;
+		}
+
+	/* Get original content type */
+
+	ctype = CMS_signed_get0_data_by_OBJ(si,
+				OBJ_nid2obj(NID_pkcs9_contentType),
+					-3, V_ASN1_OBJECT);
+	if (!ctype)
+		{
+		CMSerr(CMS_F_CMS_ENCODE_RECEIPT, CMS_R_NO_CONTENT_TYPE);
+		goto err;
+		}
+
+	rct.version = 1;
+	rct.contentType = ctype;
+	rct.signedContentIdentifier = rr->signedContentIdentifier;
+	rct.originatorSignatureValue = si->signature;
+
+	os = ASN1_item_pack(&rct, ASN1_ITEM_rptr(CMS_Receipt), NULL);
+
+	err:
+	if (rr)
+		CMS_ReceiptRequest_free(rr);
+
+	return os;
+
+	}
+
+
diff --git a/crypto/cms/cms_lcl.h b/crypto/cms/cms_lcl.h
index ec644c36fb..c8ecfa724a 100644
--- a/crypto/cms/cms_lcl.h
+++ b/crypto/cms/cms_lcl.h
@@ -450,6 +450,8 @@ int cms_EncryptedContent_init(CMS_EncryptedContentInfo *ec,
 				const unsigned char *key, size_t keylen);
 
 int cms_Receipt_verify(CMS_ContentInfo *cms, CMS_ContentInfo *req_cms);
+int cms_msgSigDigest_add1(CMS_SignerInfo *dest, CMS_SignerInfo *src);
+ASN1_OCTET_STRING *cms_encode_Receipt(CMS_SignerInfo *si);
 
 BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms);
 	
diff --git a/crypto/cms/cms_smime.c b/crypto/cms/cms_smime.c
index b37d17c5af..48885ce675 100644
--- a/crypto/cms/cms_smime.c
+++ b/crypto/cms/cms_smime.c
@@ -471,6 +471,78 @@ CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
 	return NULL;
 	}
 
+CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
+					X509 *signcert, EVP_PKEY *pkey,
+					STACK_OF(X509) *certs,
+					unsigned int flags)
+	{
+	CMS_SignerInfo *rct_si;
+	CMS_ContentInfo *cms = NULL;
+	ASN1_OCTET_STRING **pos, *os;
+	BIO *rct_cont = NULL;
+	int r = 0;
+
+	flags &= ~CMS_STREAM;
+	/* Not really detached but avoids content being allocated */
+	flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
+	if (!pkey || !signcert)
+		{
+		CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
+		return NULL;
+		}
+
+	/* Initialize signed data */
+
+	cms = CMS_sign(NULL, NULL, certs, NULL, flags);
+	if (!cms)
+		goto err;
+
+	/* Set inner content type to signed receipt */
+	if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
+		goto err;
+
+	rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
+	if (!rct_si)
+		{
+		CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
+		goto err;
+		}
+
+	os = cms_encode_Receipt(si);
+
+	if (!os)
+		goto err;
+
+	/* Set content to digest */
+	rct_cont = BIO_new_mem_buf(os->data, os->length);
+	if (!rct_cont)
+		goto err;
+
+	/* Add msgSigDigest attribute */
+
+	if (!cms_msgSigDigest_add1(rct_si, si))
+		goto err;
+
+	/* Finalize structure */
+	if (!CMS_final(cms, rct_cont, flags))
+		goto err;
+
+	/* Set embedded content */
+	pos = CMS_get0_content(cms);
+	*pos = os;
+
+	r = 1;
+
+	err:
+	if (rct_cont)
+		BIO_free(rct_cont);
+	if (r)
+		return cms;
+	CMS_ContentInfo_free(cms);
+	return NULL;
+
+	}
+
 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
 				const EVP_CIPHER *cipher, unsigned int flags)
 	{