CMS_GET1_RECEIPTREQUEST(3ossl)

💌 CMS_GET1_RECEIPTREQUEST(3ossl) — the receipt-request glow-up

okay bestie, so this is the CMS_GET1_RECEIPTREQUEST(3ossl) manual page, and it's literally all about CMS signed receipt requests — the "yes i got your message, here's proof 💅" of the crypto world. Six functions, zero fluff, let's go 🎀

---

✨ NAME ✨

CMS_ReceiptRequest_create0_ex, CMS_ReceiptRequest_create0, CMS_add1_ReceiptRequest, CMS_get1_ReceiptRequest, CMS_ReceiptRequest_get0_values — the CMS signed receipt request functions 🧚

---

🌸 SYNOPSIS 🌸

#include <openssl/cms.h>

CMS_ReceiptRequest *CMS_ReceiptRequest_create0_ex(
    unsigned char *id, int idlen, int allorfirst,
    STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo,
    OSSL_LIB_CTX *libctx);
CMS_ReceiptRequest *CMS_ReceiptRequest_create0(
    unsigned char *id, int idlen, int allorfirst,
    STACK_OF(GENERAL_NAMES) *receiptList, STACK_OF(GENERAL_NAMES) *receiptsTo);
int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr);
int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr);
void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr, ASN1_STRING **pcid,
                                    int *pallorfirst,
                                    STACK_OF(GENERAL_NAMES) **plist,
                                    STACK_OF(GENERAL_NAMES) **prto);

---

💖 DESCRIPTION 💖

So CMS_ReceiptRequest_create0_ex() is the main character here — it creates a signed receipt request structure. 🫶

• The signedContentIdentifier field gets set using id and idlen… unless id is NULL, in which case it gets set to 32 bytes of pseudo random data instead. iconic behavior ngl ✨
• If receiptList is NULL, the allOrFirstTier option in receiptsFrom is used, and it's set to the value of the allorfirst parameter. 🎯
• If receiptList is not NULL, the receiptList option in receiptsFrom is used instead. slay, choose your fighter 💅
• The receiptsTo parameter specifies the receiptsTo field value. 📬
• The library context libctx is used to find the public random generator. 🎲

CMS_ReceiptRequest_create0() is basically the same vibe as CMS_ReceiptRequest_create0_ex() — literally similar — except it uses default values of NULL for the library context libctx. no ctx, no problem 🙈

CMS_add1_ReceiptRequest() adds a signed receipt request rr to the SignerInfo structure si. it's giving "attach the receipt to the signerinfo, periodt" 👑

int CMS_get1_ReceiptRequest() looks for a signed receipt request in si, and if any is found, it gets decoded and written to prr. 👀

CMS_ReceiptRequest_get0_values() retrieves the values of a receipt request, bestie:

• The signedContentIdentifier is copied to pcid. 🆔
• If the allOrFirstTier option of receiptsFrom is used, its value is copied to pallorfirst — otherwise the receiptList field is copied to plist. 🔀
• The receiptsTo parameter is copied to prto. 📮

---

🦋 NOTES 🦋

For more deets on what all these fields actually mean, see RFC2634. iykyk 📖

⚠️ The contents of a signed receipt should only be considered meaningful if the corresponding CMS_ContentInfo structure can be successfully verified using CMS_verify(). like, don't trust a receipt you can't verify, fr fr 💀

---

🔥 RETURN VALUES 🔥

• CMS_ReceiptRequest_create0_ex() and CMS_ReceiptRequest_create0() return a signed receipt request structure, or NULL if an error occurred. 😭
• CMS_add1_ReceiptRequest() returns 1 for success or 0 if an error occurred. ✅
• CMS_get1_ReceiptRequest() returns 1 if a signed receipt request is found and decoded. It returns 0 if a signed receipt request is not present, and -1 if it is present but malformed. three whole moods 💀

---

🌈 SEE ALSO 🌈

ERR_get_error(3), CMS_sign(3), CMS_sign_receipt(3), CMS_verify(3), CMS_verify_receipt(3) — go read those too, bestie, they're all linked in the group chat 🫶

---

⭐ HISTORY ⭐

The function CMS_ReceiptRequest_create0_ex() was added in OpenSSL 3.0. new-ish but already iconic 💅

---

👑 COPYRIGHT 👑

Copyright 2008-2021 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

---

and that's the whole page, no cap 🎀 this was OpenSSL 3.5.0, dated 2026-09-25, and the manual page is CMS_GET1_RECEIPTREQUEST(3ossl) — receipts have never looked this cute 💖✨🍓