CMS_CONTENTINFO_NEW(3)

💅 CMS_CONTENTINFO_NEW(3) — okay bestie, let's talk CMS structs

So this is a page from the Library Functions Manual, and the star of the show is CMS_CONTENTINFO_NEW(3). It's giving crypto-girlie energy: we're talking Cryptographic Message Syntax data structures, from libcrypto. Buckle up, this is actually so good. 🎀

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✨ NAME ✨

CMS_ContentInfo_new, CMS_ContentInfo_free, CMS_ContentInfo_print_ctx, CMS_ReceiptRequest_new, CMS_ReceiptRequest_free — all the Cryptographic Message Syntax data structure girlies. 🦋

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🌸 SYNOPSIS 🌸

Like, the library is libcrypto, and you gotta include the header first, obviously:

#include <openssl/cms.h>

Then, the functions, one by one, no cap:

CMS_ContentInfo *
CMS_ContentInfo_new(void);

void
CMS_ContentInfo_free(CMS_ContentInfo *cms);

int
CMS_ContentInfo_print_ctx(BIO *out, CMS_ContentInfo *cms, int indent,
    const ASN1_PCTX *pctx);

CMS_ReceiptRequest *
CMS_ReceiptRequest_new(void);

void
CMS_ReceiptRequest_free(CMS_ReceiptRequest *rr);

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🧚 DESCRIPTION 🧚

CMS_ContentInfo_new() allocates and initializes an empty CMS_ContentInfo object — literally brand new, no thoughts, head empty — and that object represents an ASN.1 ContentInfo structure defined in RFC 5652 section 3. 💫

This thing can hold a pointer to an ASN.1 OBJECT IDENTIFIER, plus a pointer to either a SignedData, EnvelopedData, DigestedData, EncryptedData, AuthenticatedData, or CompressedData object — or, if it's feeling quirky, to an arbitrary ASN.1 object. So many options, all valid, we love a flexible icon. 👑

CMS_ContentInfo_free() frees cms. Bye bestie, thanks for the memories. 💅

CMS_ContentInfo_print_ctx() prints a human-readable representation of cms to out. Like a little glow-up so you can actually read it.

CMS_ReceiptRequest_new() allocates and initializes an empty CMS_ReceiptRequest object, representing an ASN.1 ReceiptRequest structure defined in RFC 2634 section 2.7. It can contain:

• a content identifier 🌈
• a list of recipients requested to return a signed receipt 💌
• a list of users to send the receipt to 🫶

CMS_ReceiptRequest_free() frees rr. Another one released into the wild. ✨

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🔥 RETURN VALUES 🔥

CMS_ContentInfo_new() and CMS_ReceiptRequest_new() return the new CMS_ContentInfo or CMS_ReceiptRequest object, respectively — iconic, successful, glowing.

Or they return NULL if an error occurs. 😭 And yeah, you should check for that, bestie. NULL is not the vibe.

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🦋 SEE ALSO 🦋

The whole friend group, honestly:

BIO_new_CMS(3), CMS_add0_cert(3), CMS_add1_recipient_cert(3), CMS_add1_signer(3), CMS_compress(3), CMS_decrypt(3), CMS_encrypt(3), CMS_final(3), CMS_get0_RecipientInfos(3), CMS_get0_SignerInfos(3), CMS_get0_type(3), CMS_get1_ReceiptRequest(3), CMS_sign(3), CMS_sign_receipt(3), CMS_signed_add1_attr(3), CMS_uncompress(3), CMS_verify(3), CMS_verify_receipt(3), crypto(3), d2i_CMS_ContentInfo(3), i2d_CMS_bio_stream(3), PEM_read_bio_PrivateKey(3), PEM_write_bio_CMS_stream(3), SMIME_read_CMS(3), SMIME_write_CMS(3)

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📚 STANDARDS 📚

The receipts, literally:

• RFC 5652: Cryptographic Message Syntax, section 3: General Syntax
• RFC 3274: Compressed Data Content Type for Cryptographic Message Syntax (CMS)
• RFC 2634: Enhanced Security Services for S/MIME, section 2.7: Receipt Request Syntax

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👑 HISTORY 👑

CMS_ContentInfo_new(), CMS_ContentInfo_free(), CMS_ReceiptRequest_new(), and CMS_ReceiptRequest_free() first appeared in OpenSSL 0.9.8h, and CMS_ContentInfo_print_ctx() showed up in OpenSSL 1.0.0. This function has been available since OpenBSD 6.7. A whole glow-up timeline, honestly. ⭐

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And that's the tea, bestie — go forth and CMS responsibly. 🍓

Mwah 💋 — this page is served up from Debian, dated December 20, 2025. Catch you in the next manpage! 🎀✨