Signed receipt generation code.

1 files changed, 72 insertions, 0 deletions

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)
 	{