NAME
PKCS7_new,
PKCS7_free,
PKCS7_SIGNED_new,
PKCS7_SIGNED_free,
PKCS7_ENVELOPE_new,
PKCS7_ENVELOPE_free,
PKCS7_SIGN_ENVELOPE_new,
PKCS7_SIGN_ENVELOPE_free,
PKCS7_DIGEST_new,
PKCS7_DIGEST_free,
PKCS7_ENCRYPT_new,
PKCS7_ENCRYPT_free,
PKCS7_ENC_CONTENT_new,
PKCS7_ENC_CONTENT_free,
PKCS7_SIGNER_INFO_new,
PKCS7_SIGNER_INFO_free,
PKCS7_RECIP_INFO_new,
PKCS7_RECIP_INFO_free,
PKCS7_ISSUER_AND_SERIAL_new,
PKCS7_ISSUER_AND_SERIAL_free —
PKCS#7 data structures
SYNOPSIS
#include
<openssl/pkcs7.h>
PKCS7 *
PKCS7_new(void);
void
PKCS7_free(PKCS7
*p7);
PKCS7_SIGNED *
PKCS7_SIGNED_new(void);
void
PKCS7_SIGNED_free(PKCS7_SIGNED
*signed);
PKCS7_ENVELOPE *
PKCS7_ENVELOPE_new(void);
void
PKCS7_ENVELOPE_free(PKCS7_ENVELOPE
*envelope);
PKCS7_SIGN_ENVELOPE *
PKCS7_SIGN_ENVELOPE_new(void);
void
PKCS7_SIGN_ENVELOPE_free(PKCS7_SIGN_ENVELOPE
*signed_envelope);
PKCS7_DIGEST *
PKCS7_DIGEST_new(void);
void
PKCS7_DIGEST_free(PKCS7_DIGEST
*digested);
PKCS7_ENCRYPT *
PKCS7_ENCRYPT_new(void);
void
PKCS7_ENCRYPT_free(PKCS7_ENCRYPT
*encrypted);
PKCS7_ENC_CONTENT *
PKCS7_ENC_CONTENT_new(void);
void
PKCS7_ENC_CONTENT_free(PKCS7_ENC_CONTENT
*content);
PKCS7_SIGNER_INFO *
PKCS7_SIGNER_INFO_new(void);
void
PKCS7_SIGNER_INFO_free(PKCS7_SIGNER_INFO
*signer);
PKCS7_RECIP_INFO *
PKCS7_RECIP_INFO_new(void);
void
PKCS7_RECIP_INFO_free(PKCS7_RECIP_INFO
*recip);
PKCS7_ISSUER_AND_SERIAL *
PKCS7_ISSUER_AND_SERIAL_new(void);
void
PKCS7_ISSUER_AND_SERIAL_free(PKCS7_ISSUER_AND_SERIAL
*cert);
DESCRIPTION
PKCS#7 is an ASN.1-based format for transmitting data that has cryptography applied to it, in particular signed and encrypted data.
PKCS7_new()
allocates and initializes an empty PKCS7 object,
representing an ASN.1 ContentInfo structure defined in
RFC 2315 section 7. It is the top-level data structure able to hold any kind
of content that can be transmitted using PKCS#7. It can be used recursively
in PKCS7_SIGNED and PKCS7_DIGEST
objects.
PKCS7_free()
frees p7.
PKCS7_SIGNED_new()
allocates and initializes an empty PKCS7_SIGNED
object, representing an ASN.1 SignedData structure
defined in RFC 2315 section 9. It can be used inside
PKCS7 objects and holds any kind of content together
with signatures by zero or more signers and information about the signing
algorithm and certificates used.
PKCS7_SIGNED_free()
frees signed.
PKCS7_ENVELOPE_new()
allocates and initializes an empty PKCS7_ENVELOPE
object, representing an ASN.1 EnvelopedData structure
defined in RFC 2315 section 10. It can be used inside
PKCS7 objects and holds any kind of encrypted content
together with content-encryption keys for one or more recipients.
PKCS7_ENVELOPE_free()
frees envelope.
PKCS7_SIGN_ENVELOPE_new()
allocates and initializes an empty PKCS7_SIGN_ENVELOPE
object, representing an ASN.1 SignedAndEnvelopedData
structure defined in RFC 2315 section 11. It can be used inside
PKCS7 objects and holds any kind of encrypted content
together with signatures by one or more signers, information about the
signing algorithm and certificates used, and content-encryption keys for one
or more recipients.
PKCS7_SIGN_ENVELOPE_free()
frees signed_envelope.
PKCS7_DIGEST_new()
allocates and initializes an empty PKCS7_DIGEST
object, representing an ASN.1 DigestedData structure
defined in RFC 2315 section 12. It can be used inside
PKCS7 objects and holds any kind of content together
with a message digest for checking its integrity and information about the
algorithm used.
PKCS7_DIGEST_free()
frees digested.
PKCS7_ENCRYPT_new()
allocates and initializes an empty PKCS7_ENCRYPT
object, representing an ASN.1 EncryptedData structure
defined in RFC 2315 section 13. It can be used inside
PKCS7 objects and holds any kind of encrypted content.
Keys are not included and need to be communicated separately.
PKCS7_ENCRYPT_free()
frees encrypted.
PKCS7_ENC_CONTENT_new()
allocates and initializes an empty PKCS7_ENC_CONTENT
object, representing an ASN.1 EncryptedContentInfo
structure defined in RFC 2315 section 10.1. It can be used inside
PKCS7_ENVELOPE,
PKCS7_SIGN_ENVELOPE, and
PKCS7_ENCRYPT objects and holds encrypted content
together with information about the encryption algorithm used.
PKCS7_ENC_CONTENT_free()
frees content.
PKCS7_SIGNER_INFO_new()
allocates and initializes an empty PKCS7_SIGNER_INFO
object, representing an ASN.1 SignerInfo structure
defined in RFC 2315 section 9.2. It can be used inside
PKCS7_SIGNED and
PKCS7_SIGN_ENVELOPE objects and holds a signature
together with information about the signer and the algorithms used.
PKCS7_SIGNER_INFO_free()
frees signer.
PKCS7_RECIP_INFO_new()
allocates and initializes an empty PKCS7_RECIP_INFO
object, representing an ASN.1 RecipientInfo structure
defined in RFC 2315 section 10.2. It can be used inside
PKCS7_ENVELOPE and
PKCS7_SIGN_ENVELOPE objects and holds a
content-encryption key together with information about the intended
recipient and the key encryption algorithm used.
PKCS7_RECIP_INFO_free()
frees recip.
PKCS7_ISSUER_AND_SERIAL_new()
allocates and initializes an empty
PKCS7_ISSUER_AND_SERIAL object, representing an ASN.1
IssuerAndSerialNumber structure defined in RFC 2315
section 6.7. It can be used inside PKCS7_SIGNER_INFO
and PKCS7_RECIP_INFO objects and identifies a
certificate by holding the distinguished name of the certificate issuer and
an issuer-specific certificate serial number.
PKCS7_ISSUER_AND_SERIAL_free()
frees cert.
SEE ALSO
crypto(3), d2i_PKCS7(3), i2d_PKCS7_bio_stream(3), PEM_read_PKCS7(3), PEM_write_bio_PKCS7_stream(3), PKCS7_decrypt(3), PKCS7_encrypt(3), PKCS7_ISSUER_AND_SERIAL_digest(3), PKCS7_sign(3), PKCS7_sign_add_signer(3), PKCS7_verify(3), SMIME_read_PKCS7(3), SMIME_write_PKCS7(3)
STANDARDS
RFC 2315: PKCS #7: Cryptographic Message Syntax Version 1.5
HISTORY
These functions first appeared in SSLeay 0.5.1 and have been available since OpenBSD 2.4.