path: root/crypto/cms/cms_local.h

/*
 * Copyright 2008-2023 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
 */

#ifndef OSSL_CRYPTO_CMS_LOCAL_H
# define OSSL_CRYPTO_CMS_LOCAL_H

# include <openssl/x509.h>

/*
 * Cryptographic message syntax (CMS) structures: taken from RFC3852
 */

/* Forward references */

typedef struct CMS_IssuerAndSerialNumber_st CMS_IssuerAndSerialNumber;
typedef struct CMS_EncapsulatedContentInfo_st CMS_EncapsulatedContentInfo;
typedef struct CMS_SignerIdentifier_st CMS_SignerIdentifier;
typedef struct CMS_OtherRevocationInfoFormat_st CMS_OtherRevocationInfoFormat;
typedef struct CMS_OriginatorInfo_st CMS_OriginatorInfo;
typedef struct CMS_EncryptedContentInfo_st CMS_EncryptedContentInfo;
typedef struct CMS_DigestedData_st CMS_DigestedData;
typedef struct CMS_EncryptedData_st CMS_EncryptedData;
typedef struct CMS_AuthenticatedData_st CMS_AuthenticatedData;
typedef struct CMS_AuthEnvelopedData_st CMS_AuthEnvelopedData;
typedef struct CMS_CompressedData_st CMS_CompressedData;
typedef struct CMS_OtherCertificateFormat_st CMS_OtherCertificateFormat;
typedef struct CMS_KeyTransRecipientInfo_st CMS_KeyTransRecipientInfo;
typedef struct CMS_OriginatorPublicKey_st CMS_OriginatorPublicKey;
typedef struct CMS_OriginatorIdentifierOrKey_st CMS_OriginatorIdentifierOrKey;
typedef struct CMS_KeyAgreeRecipientInfo_st CMS_KeyAgreeRecipientInfo;
typedef struct CMS_RecipientKeyIdentifier_st CMS_RecipientKeyIdentifier;
typedef struct CMS_KeyAgreeRecipientIdentifier_st
    CMS_KeyAgreeRecipientIdentifier;
typedef struct CMS_KEKIdentifier_st CMS_KEKIdentifier;
typedef struct CMS_KEKRecipientInfo_st CMS_KEKRecipientInfo;
typedef struct CMS_PasswordRecipientInfo_st CMS_PasswordRecipientInfo;
typedef struct CMS_OtherRecipientInfo_st CMS_OtherRecipientInfo;
typedef struct CMS_ReceiptsFrom_st CMS_ReceiptsFrom;
typedef struct CMS_CTX_st CMS_CTX;

struct CMS_CTX_st {
    OSSL_LIB_CTX *libctx;
    char *propq;
};

struct CMS_ContentInfo_st {
    ASN1_OBJECT *contentType;
    union {
        ASN1_OCTET_STRING *data;
        CMS_SignedData *signedData;
        CMS_EnvelopedData *envelopedData;
        CMS_DigestedData *digestedData;
        CMS_EncryptedData *encryptedData;
        CMS_AuthEnvelopedData *authEnvelopedData;
        CMS_AuthenticatedData *authenticatedData;
        CMS_CompressedData *compressedData;
        ASN1_TYPE *other;
        /* Other types ... */
        void *otherData;
    } d;
    CMS_CTX ctx;
};

DEFINE_STACK_OF(CMS_CertificateChoices)

struct CMS_SignedData_st {
    int32_t version;
    STACK_OF(X509_ALGOR) *digestAlgorithms;
    CMS_EncapsulatedContentInfo *encapContentInfo;
    STACK_OF(CMS_CertificateChoices) *certificates;
    STACK_OF(CMS_RevocationInfoChoice) *crls;
    STACK_OF(CMS_SignerInfo) *signerInfos;
};

struct CMS_EncapsulatedContentInfo_st {
    ASN1_OBJECT *eContentType;
    ASN1_OCTET_STRING *eContent;
    /* Set to 1 if incomplete structure only part set up */
    int partial;
};

struct CMS_SignerInfo_st {
    int32_t version;
    CMS_SignerIdentifier *sid;
    X509_ALGOR *digestAlgorithm;
    STACK_OF(X509_ATTRIBUTE) *signedAttrs;
    X509_ALGOR *signatureAlgorithm;
    ASN1_OCTET_STRING *signature;
    STACK_OF(X509_ATTRIBUTE) *unsignedAttrs;
    /* Signing certificate and key */
    X509 *signer;
    EVP_PKEY *pkey;
    /* Digest and public key context for alternative parameters */
    EVP_MD_CTX *mctx;
    EVP_PKEY_CTX *pctx;
    const CMS_CTX *cms_ctx;
};

struct CMS_SignerIdentifier_st {
    int type;
    union {
        CMS_IssuerAndSerialNumber *issuerAndSerialNumber;
        ASN1_OCTET_STRING *subjectKeyIdentifier;
    } d;
};

struct CMS_EnvelopedData_st {
    int32_t version;
    CMS_OriginatorInfo *originatorInfo;
    STACK_OF(CMS_RecipientInfo) *recipientInfos;
    CMS_EncryptedContentInfo *encryptedContentInfo;
    STACK_OF(X509_ATTRIBUTE) *unprotectedAttrs;
};

struct CMS_OriginatorInfo_st {
    STACK_OF(CMS_CertificateChoices) *certificates;
    STACK_OF(CMS_RevocationInfoChoice) *crls;
};

struct CMS_EncryptedContentInfo_st {
    ASN1_OBJECT *contentType;
    X509_ALGOR *contentEncryptionAlgorithm;
    ASN1_OCTET_STRING *encryptedContent;
    /* Content encryption algorithm, key and tag */
    const EVP_CIPHER *cipher;
    unsigned char *key;
    size_t keylen;
    unsigned char *tag;
    size_t taglen;
    /* Set to 1 if we are debugging decrypt and don't fake keys for MMA */
    int debug;
    /* Set to 1 if we have no cert and need extra safety measures for MMA */
    int havenocert;
};

struct CMS_RecipientInfo_st {
    int type;
    union {
        CMS_KeyTransRecipientInfo *ktri;
        CMS_KeyAgreeRecipientInfo *kari;
        CMS_KEKRecipientInfo *kekri;
        CMS_PasswordRecipientInfo *pwri;
        CMS_OtherRecipientInfo *ori;
    } d;
};

typedef CMS_SignerIdentifier CMS_RecipientIdentifier;

struct CMS_KeyTransRecipientInfo_st {
    int32_t version;
    CMS_RecipientIdentifier *rid;
    X509_ALGOR *keyEncryptionAlgorithm;
    ASN1_OCTET_STRING *encryptedKey;
    /* Recipient Key and cert */
    X509 *recip;
    EVP_PKEY *pkey;
    /* Public key context for this operation */
    EVP_PKEY_CTX *pctx;
    const CMS_CTX *cms_ctx;
};

struct CMS_KeyAgreeRecipientInfo_st {
    int32_t version;
    CMS_OriginatorIdentifierOrKey *originator;
    ASN1_OCTET_STRING *ukm;
    X509_ALGOR *keyEncryptionAlgorithm;
    STACK_OF(CMS_RecipientEncryptedKey) *recipientEncryptedKeys;
    /* Public key context associated with current operation */
    EVP_PKEY_CTX *pctx;
    /* Cipher context for CEK wrapping */
    EVP_CIPHER_CTX *ctx;
    const CMS_CTX *cms_ctx;
};

struct CMS_OriginatorIdentifierOrKey_st {
    int type;
    union {
        CMS_IssuerAndSerialNumber *issuerAndSerialNumber;
        ASN1_OCTET_STRING *subjectKeyIdentifier;
        CMS_OriginatorPublicKey *originatorKey;
    } d;
};

struct CMS_OriginatorPublicKey_st {
    X509_ALGOR *algorithm;
    ASN1_BIT_STRING *publicKey;
};

struct CMS_RecipientEncryptedKey_st {
    CMS_KeyAgreeRecipientIdentifier *rid;
    ASN1_OCTET_STRING *encryptedKey;
    /* Public key associated with this recipient */
    EVP_PKEY *pkey;
};

struct CMS_KeyAgreeRecipientIdentifier_st {
    int type;
    union {
        CMS_IssuerAndSerialNumber *issuerAndSerialNumber;
        CMS_RecipientKeyIdentifier *rKeyId;
    } d;
};

struct CMS_RecipientKeyIdentifier_st {
    ASN1_OCTET_STRING *subjectKeyIdentifier;
    ASN1_GENERALIZEDTIME *date;
    CMS_OtherKeyAttribute *other;
};

struct CMS_KEKRecipientInfo_st {
    int32_t version;
    CMS_KEKIdentifier *kekid;
    X509_ALGOR *keyEncryptionAlgorithm;
    ASN1_OCTET_STRING *encryptedKey;
    /* Extra info: symmetric key to use */
    unsigned char *key;
    size_t keylen;
    const CMS_CTX *cms_ctx;
};

struct CMS_KEKIdentifier_st {
    ASN1_OCTET_STRING *keyIdentifier;
    ASN1_GENERALIZEDTIME *date;
    CMS_OtherKeyAttribute *other;
};

struct CMS_PasswordRecipientInfo_st {
    int32_t version;
    X509_ALGOR *keyDerivationAlgorithm;
    X509_ALGOR *keyEncryptionAlgorithm;
    ASN1_OCTET_STRING *encryptedKey;
    /* Extra info: password to use */
    unsigned char *pass;
    size_t passlen;
    const CMS_CTX *cms_ctx;
};

struct CMS_OtherRecipientInfo_st {
    ASN1_OBJECT *oriType;
    ASN1_TYPE *oriValue;
};

struct CMS_DigestedData_st {
    int32_t version;
    X509_ALGOR *digestAlgorithm;
    CMS_EncapsulatedContentInfo *encapContentInfo;
    ASN1_OCTET_STRING *digest;
};

struct CMS_EncryptedData_st {
    int32_t version;
    CMS_EncryptedContentInfo *encryptedContentInfo;
    STACK_OF(X509_ATTRIBUTE) *unprotectedAttrs;
};

struct CMS_AuthenticatedData_st {
    int32_t version;
    CMS_OriginatorInfo *originatorInfo;
    STACK_OF(CMS_RecipientInfo) *recipientInfos;
    X509_ALGOR *macAlgorithm;
    X509_ALGOR *digestAlgorithm;
    CMS_EncapsulatedContentInfo *encapContentInfo;
    STACK_OF(X509_ATTRIBUTE) *authAttrs;
    ASN1_OCTET_STRING *mac;
    STACK_OF(X509_ATTRIBUTE) *unauthAttrs;
};

struct CMS_AuthEnvelopedData_st {
    int32_t version;
    CMS_OriginatorInfo *originatorInfo;
    STACK_OF(CMS_RecipientInfo) *recipientInfos;
    CMS_EncryptedContentInfo *authEncryptedContentInfo;
    STACK_OF(X509_ATTRIBUTE