initial/final commitHEADmaster

1 files changed, 1180 insertions, 0 deletions

diff --git a/openssl-1.1.0h/crypto/pkcs7/pk7_doit.c b/openssl-1.1.0h/crypto/pkcs7/pk7_doit.c
new file mode 100644
index 0000000..e6e80f0
--- /dev/null
+++ b/openssl-1.1.0h/crypto/pkcs7/pk7_doit.c
@@ -0,0 +1,1180 @@
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <openssl/err.h>
+
+static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
+                         void *value);
+static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
+
+static int PKCS7_type_is_other(PKCS7 *p7)
+{
+    int isOther = 1;
+
+    int nid = OBJ_obj2nid(p7->type);
+
+    switch (nid) {
+    case NID_pkcs7_data:
+    case NID_pkcs7_signed:
+    case NID_pkcs7_enveloped:
+    case NID_pkcs7_signedAndEnveloped:
+    case NID_pkcs7_digest:
+    case NID_pkcs7_encrypted:
+        isOther = 0;
+        break;
+    default:
+        isOther = 1;
+    }
+
+    return isOther;
+
+}
+
+static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
+{
+    if (PKCS7_type_is_data(p7))
+        return p7->d.data;
+    if (PKCS7_type_is_other(p7) && p7->d.other
+        && (p7->d.other->type == V_ASN1_OCTET_STRING))
+        return p7->d.other->value.octet_string;
+    return NULL;
+}
+
+static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
+{
+    BIO *btmp;
+    const EVP_MD *md;
+    if ((btmp = BIO_new(BIO_f_md())) == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
+        goto err;
+    }
+
+    md = EVP_get_digestbyobj(alg->algorithm);
+    if (md == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
+        goto err;
+    }
+
+    BIO_set_md(btmp, md);
+    if (*pbio == NULL)
+        *pbio = btmp;
+    else if (!BIO_push(*pbio, btmp)) {
+        PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
+        goto err;
+    }
+    btmp = NULL;
+
+    return 1;
+
+ err:
+    BIO_free(btmp);
+    return 0;
+
+}
+
+static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
+                              unsigned char *key, int keylen)
+{
+    EVP_PKEY_CTX *pctx = NULL;
+    EVP_PKEY *pkey = NULL;
+    unsigned char *ek = NULL;
+    int ret = 0;
+    size_t eklen;
+
+    pkey = X509_get0_pubkey(ri->cert);
+
+    if (!pkey)
+        return 0;
+
+    pctx = EVP_PKEY_CTX_new(pkey, NULL);
+    if (!pctx)
+        return 0;
+
+    if (EVP_PKEY_encrypt_init(pctx) <= 0)
+        goto err;
+
+    if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
+                          EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
+        goto err;
+    }
+
+    if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
+        goto err;
+
+    ek = OPENSSL_malloc(eklen);
+
+    if (ek == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
+        goto err;
+
+    ASN1_STRING_set0(ri->enc_key, ek, eklen);
+    ek = NULL;
+
+    ret = 1;
+
+ err:
+    EVP_PKEY_CTX_free(pctx);
+    OPENSSL_free(ek);
+    return ret;
+
+}
+
+static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
+                               PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
+{
+    EVP_PKEY_CTX *pctx = NULL;
+    unsigned char *ek = NULL;
+    size_t eklen;
+
+    int ret = -1;
+
+    pctx = EVP_PKEY_CTX_new(pkey, NULL);
+    if (!pctx)
+        return -1;
+
+    if (EVP_PKEY_decrypt_init(pctx) <= 0)
+        goto err;
+
+    if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
+                          EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
+        goto err;
+    }
+
+    if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
+                         ri->enc_key->data, ri->enc_key->length) <= 0)
+        goto err;
+
+    ek = OPENSSL_malloc(eklen);
+
+    if (ek == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (EVP_PKEY_decrypt(pctx, ek, &eklen,
+                         ri->enc_key->data, ri->enc_key->length) <= 0) {
+        ret = 0;
+        PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
+        goto err;
+    }
+
+    ret = 1;
+
+    OPENSSL_clear_free(*pek, *peklen);
+    *pek = ek;
+    *peklen = eklen;
+
+ err:
+    EVP_PKEY_CTX_free(pctx);
+    if (!ret)
+        OPENSSL_free(ek);
+
+    return ret;
+}
+
+BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
+{
+    int i;
+    BIO *out = NULL, *btmp = NULL;
+    X509_ALGOR *xa = NULL;
+    const EVP_CIPHER *evp_cipher = NULL;
+    STACK_OF(X509_ALGOR) *md_sk = NULL;
+    STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
+    X509_ALGOR *xalg = NULL;
+    PKCS7_RECIP_INFO *ri = NULL;
+    ASN1_OCTET_STRING *os = NULL;
+
+    if (p7 == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
+        return NULL;
+    }
+    /*
+     * The content field in the PKCS7 ContentInfo is optional, but that really
+     * only applies to inner content (precisely, detached signatures).
+     *
+     * When reading content, missing outer content is therefore treated as an
+     * error.
+     *
+     * When creating content, PKCS7_content_new() must be called before
+     * calling this method, so a NULL p7->d is always an error.
+     */
+    if (p7->d.ptr == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
+        return NULL;
+    }
+
+    i = OBJ_obj2nid(p7->type);
+    p7->state = PKCS7_S_HEADER;
+
+    switch (i) {
+    case NID_pkcs7_signed:
+        md_sk = p7->d.sign->md_algs;
+        os = PKCS7_get_octet_string(p7->d.sign->contents);
+        break;
+    case NID_pkcs7_signedAndEnveloped:
+        rsk = p7->d.signed_and_enveloped->recipientinfo;
+        md_sk = p7->d.signed_and_enveloped->md_algs;
+        xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
+        evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
+        if (evp_cipher == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
+            goto err;
+        }
+        break;
+    case NID_pkcs7_enveloped:
+        rsk = p7->d.enveloped->recipientinfo;
+        xalg = p7->d.enveloped->enc_data->algorithm;
+        evp_cipher = p7->d.enveloped->enc_data->cipher;
+        if (evp_cipher == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
+            goto err;
+        }
+        break;
+    case NID_pkcs7_digest:
+        xa = p7->d.digest->md;
+        os = PKCS7_get_octet_string(p7->d.digest->contents);
+        break;
+    case NID_pkcs7_data:
+        break;
+    default:
+        PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
+        goto err;
+    }
+
+    for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
+        if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
+            goto err;
+
+    if (xa && !PKCS7_bio_add_digest(&out, xa))
+        goto err;
+
+    if (evp_cipher != NULL) {
+        unsigned char key[EVP_MAX_KEY_LENGTH];
+        unsigned char iv[EVP_MAX_IV_LENGTH];
+        int keylen, ivlen;
+        EVP_CIPHER_CTX *ctx;
+
+        if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
+            goto err;
+        }
+        BIO_get_cipher_ctx(btmp, &ctx);
+        keylen = EVP_CIPHER_key_length(evp_cipher);
+        ivlen = EVP_CIPHER_iv_length(evp_cipher);
+        xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
+        if (ivlen > 0)
+            if (RAND_bytes(iv, ivlen) <= 0)
+                goto err;
+        if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
+            goto err;
+        if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
+            goto err;
+        if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
+            goto err;
+
+        if (ivlen > 0) {
+            if (xalg->parameter == NULL) {
+                xalg->parameter = ASN1_TYPE_new();
+                if (xalg->parameter == NULL)
+                    goto err;
+            }
+            if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
+                goto err;
+        }
+
+        /* Lets do the pub key stuff :-) */
+        for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
+            ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
+            if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
+                goto err;
+        }
+        OPENSSL_cleanse(key, keylen);
+
+        if (out == NULL)
+            out = btmp;
+        else
+            BIO_push(out, btmp);
+        btmp = NULL;
+    }
+
+    if (bio == NULL) {
+        if (PKCS7_is_detached(p7)) {
+            bio = BIO_new(BIO_s_null());
+        } else if (os && os->length > 0) {
+            bio = BIO_new_mem_buf(os->data, os->length);
+        } else {
+            bio = BIO_new(BIO_s_mem());
+            if (bio == NULL)
+                goto err;
+            BIO_set_mem_eof_return(bio, 0);
+        }
+        if (bio == NULL)
+            goto err;
+    }
+    if (out)
+        BIO_push(out, bio);
+    else
+        out = bio;
+    return out;
+
+ err:
+    BIO_free_all(out);
+    BIO_free_all(btmp);
+    return NULL;
+}
+
+static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
+{
+    int ret;
+    ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
+                        X509_get_issuer_name(pcert));
+    if (ret)
+        return ret;
+    return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert),
+                            ri->issuer_and_serial->serial);
+}
+
+/* int */
+BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
+{
+    int i, j;
+    BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
+    X509_ALGOR *xa;
+    ASN1_OCTET_STRING *data_body = NULL;
+    const EVP_MD *evp_md;
+    const EVP_CIPHER *evp_cipher = NULL;
+    EVP_CIPHER_CTX *evp_ctx = NULL;
+    X509_ALGOR *enc_alg = NULL;
+    STACK_OF(X509_ALGOR) *md_sk = NULL;
+    STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
+    PKCS7_RECIP_INFO *ri = NULL;
+    unsigned char *ek = NULL, *tkey = NULL;
+    int eklen = 0, tkeylen = 0;
+
+    if (p7 == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
+        return NULL;
+    }
+
+    if (p7->d.ptr == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
+        return NULL;
+    }
+
+    i = OBJ_obj2nid(p7->type);
+    p7->state = PKCS7_S_HEADER;
+
+    switch (i) {
+    case NID_pkcs7_signed:
+        /*
+         * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
+         * field and optional content.
+         * data_body is NULL if that structure has no (=detached) content
+         * or if the contentType is wrong (i.e., not "data").
+         */
+        data_body = PKCS7_get_octet_string(p7->d.sign->contents);
+        if (!PKCS7_is_detached(p7) && data_body == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+                     PKCS7_R_INVALID_SIGNED_DATA_TYPE);
+            goto err;
+        }
+        md_sk = p7->d.sign->md_algs;
+        break;
+    case NID_pkcs7_signedAndEnveloped:
+        rsk = p7->d.signed_and_enveloped->recipientinfo;
+        md_sk = p7->d.signed_and_enveloped->md_algs;
+        /* data_body is NULL if the optional EncryptedContent is missing. */
+        data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
+        enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
+        evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
+        if (evp_cipher == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+                     PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
+            goto err;
+        }
+        break;
+    case NID_pkcs7_enveloped:
+        rsk = p7->d.enveloped->recipientinfo;
+        enc_alg = p7->d.enveloped->enc_data->algorithm;
+        /* data_body is NULL if the optional EncryptedContent is missing. */
+        data_body = p7->d.enveloped->enc_data->enc_data;
+        evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
+        if (evp_cipher == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+                     PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
+            goto err;
+        }
+        break;
+    default:
+        PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
+        goto err;
+    }
+
+    /* Detached content must be supplied via in_bio instead. */
+    if (data_body == NULL && in_bio == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
+        goto err;
+    }
+
+    /* We will be checking the signature */
+    if (md_sk != NULL) {
+        for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
+            xa = sk_X509_ALGOR_value(md_sk, i);
+            if ((btmp = BIO_new(BIO_f_md())) == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
+                goto err;
+            }
+
+            j = OBJ_obj2nid(xa->algorithm);
+            evp_md = EVP_get_digestbynid(j);
+            if (evp_md == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+                         PKCS7_R_UNKNOWN_DIGEST_TYPE);
+                goto err;
+            }
+
+            BIO_set_md(btmp, evp_md);
+            if (out == NULL)
+                out = btmp;
+            else
+                BIO_push(out, btmp);
+            btmp = NULL;
+        }
+    }
+
+    if (evp_cipher != NULL) {
+        if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
+            goto err;
+        }
+
+        /*
+         * It was encrypted, we need to decrypt the secret key with the
+         * private key
+         */
+
+        /*
+         * Find the recipientInfo which matches the passed certificate (if
+         * any)
+         */
+
+        if (pcert) {
+            for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
+                ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
+                if (!pkcs7_cmp_ri(ri, pcert))
+                    break;
+                ri = NULL;
+            }
+            if (ri == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+                         PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
+                goto err;
+            }
+        }
+
+        /* If we haven't got a certificate try each ri in turn */
+        if (pcert == NULL) {
+            /*
+             * Always attempt to decrypt all rinfo even after success as a
+             * defence against MMA timing attacks.
+             */
+            for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
+                ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
+
+                if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
+                    goto err;
+                ERR_clear_error();
+            }
+        } else {
+            /* Only exit on fatal errors, not decrypt failure */
+            if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
+                goto err;
+            ERR_clear_error();
+        }
+
+        evp_ctx = NULL;
+        BIO_get_cipher_ctx(etmp, &evp_ctx);
+        if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
+            goto err;
+        if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
+            goto err;
+        /* Generate random key as MMA defence */
+        tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
+        tkey = OPENSSL_malloc(tkeylen);
+        if (tkey == NULL)
+            goto err;
+        if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
+            goto err;
+        if (ek == NULL) {
+            ek = tkey;
+            eklen = tkeylen;
+            tkey = NULL;
+        }
+
+        if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
+            /*
+             * Some S/MIME clients don't use the same key and effective key
+             * length. The key length is determined by the size of the
+             * decrypted RSA key.
+             */
+            if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
+                /* Use random key as MMA defence */
+                OPENSSL_clear_free(ek, eklen);
+                ek = tkey;
+                eklen = tkeylen;
+                tkey = NULL;
+            }
+        }
+        /* Clear errors so we don't leak information useful in MMA */
+        ERR_clear_error();
+        if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
+            goto err;
+
+        OPENSSL_clear_free(ek, eklen);
+        ek = NULL;
+        OPENSSL_clear_free(tkey, tkeylen);
+        tkey = NULL;
+
+        if (out == NULL)
+            out = etmp;
+        else
+            BIO_push(out, etmp);
+        etmp = NULL;
+    }
+    if (in_bio != NULL) {
+        bio = in_bio;
+    } else {
+        if (data_body->length > 0)
+            bio = BIO_new_mem_buf(data_body->data, data_body->length);
+        else {
+            bio = BIO_new(BIO_s_mem());
+            if (bio == NULL)
+                goto err;
+            BIO_set_mem_eof_return(bio, 0);
+        }
+        if (bio == NULL)
+            goto err;
+    }
+    BIO_push(out, bio);
+    bio = NULL;
+    return out;
+
+ err:
+    OPENSSL_clear_free(ek, eklen);
+    OPENSSL_clear_free(tkey, tkeylen);
+    BIO_free_all(out);
+    BIO_free_all(btmp);
+    BIO_free_all(etmp);
+    BIO_free_all(bio);
+    return NULL;
+}
+
+static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
+{
+    for (;;) {
+        bio = BIO_find_type(bio, BIO_TYPE_MD);
+        if (bio == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
+                     PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
+            return NULL;
+        }
+        BIO_get_md_ctx(bio, pmd);
+        if (*pmd == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
+            return NULL;
+        }
+        if (EVP_MD_CTX_type(*pmd) == nid)
+            return bio;
+        bio = BIO_next(bio);
+    }
+    return NULL;
+}
+
+static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
+{
+    unsigned char md_data[EVP_MAX_MD_SIZE];
+    unsigned int md_len;
+
+    /* Add signing time if not already present */
+    if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
+        if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
+            PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
+            return 0;
+        }
+    }
+
+    /* Add digest */
+    if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
+        PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
+        return 0;
+    }
+    if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
+        PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    /* Now sign the attributes */
+    if (!PKCS7_SIGNER_INFO_sign(si))
+        return 0;
+
+    return 1;
+}
+
+int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
+{
+    int ret = 0;
+    int i, j;
+    BIO *btmp;
+    PKCS7_SIGNER_INFO *si;
+    EVP_MD_CTX *mdc, *ctx_tmp;
+    STACK_OF(X509_ATTRIBUTE) *sk;
+    STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
+    ASN1_OCTET_STRING *os = NULL;
+
+    if (p7 == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
+        return 0;
+    }
+
+    if (p7->d.ptr == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
+        return 0;
+    }
+
+    ctx_tmp = EVP_MD_CTX_new();
+    if (ctx_tmp == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    i = OBJ_obj2nid(p7->type);
+    p7->state = PKCS7_S_HEADER;
+
+    switch (i) {
+    case NID_pkcs7_data:
+        os = p7->d.data;
+        break;
+    case NID_pkcs7_signedAndEnveloped:
+        /* XXXXXXXXXXXXXXXX */
+        si_sk = p7->d.signed_and_enveloped->signer_info;
+        os = p7->d.signed_and_enveloped->enc_data->enc_data;
+        if (os == NULL) {
+            os = ASN1_OCTET_STRING_new();
+            if (os == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
+                goto err;
+            }
+            p7->d.signed_and_enveloped->enc_data->enc_data = os;
+        }
+        break;
+    case NID_pkcs7_enveloped:
+        /* XXXXXXXXXXXXXXXX */
+        os = p7->d.enveloped->enc_data->enc_data;
+        if (os == NULL) {
+            os = ASN1_OCTET_STRING_new();
+            if (os == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
+                goto err;
+            }
+            p7->d.enveloped->enc_data->enc_data = os;
+        }
+        break;
+    case NID_pkcs7_signed:
+        si_sk = p7->d.sign->signer_info;
+        os = PKCS7_get_octet_string(p7->d.sign->contents);
+        /* If detached data then the content is excluded */
+        if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
+            ASN1_OCTET_STRING_free(os);
+            os = NULL;
+            p7->d.sign->contents->d.data = NULL;
+        }
+        break;
+
+    case NID_pkcs7_digest:
+        os = PKCS7_get_octet_string(p7->d.digest->contents);
+        /* If detached data then the content is excluded */
+        if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
+            ASN1_OCTET_STRING_free(os);
+            os = NULL;
+            p7->d.digest->contents->d.data = NULL;
+        }
+        break;
+
+    default:
+        PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
+        goto err;
+    }
+
+    if (si_sk != NULL) {
+        for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
+            si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
+            if (si->pkey == NULL)
+                continue;
+
+            j = OBJ_obj2nid(si->digest_alg->algorithm);
+
+            btmp = bio;
+
+            btmp = PKCS7_find_digest(&mdc, btmp, j);
+
+            if (btmp == NULL)
+                goto err;
+
+            /*
+             * We now have the EVP_MD_CTX, lets do the signing.
+             */
+            if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc))
+                goto err;
+
+            sk = si->auth_attr;
+
+            /*
+             * If there are attributes, we add the digest attribute and only
+             * sign the attributes
+             */
+            if (sk_X509_ATTRIBUTE_num(sk) > 0) {
+                if (!do_pkcs7_signed_attrib(si, ctx_tmp))
+                    goto err;
+            } else {
+                unsigned char *abuf = NULL;
+                unsigned int abuflen;
+                abuflen = EVP_PKEY_size(si->pkey);
+                abuf = OPENSSL_malloc(abuflen);
+                if (abuf == NULL)
+                    goto err;
+
+                if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) {
+                    OPENSSL_free(abuf);
+                    PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
+                    goto err;
+                }
+                ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
+            }
+        }
+    } else if (i == NID_pkcs7_digest) {
+        unsigned char md_data[EVP_MAX_MD_SIZE];
+        unsigned int md_len;
+        if (!PKCS7_find_digest(&mdc, bio,
+                               OBJ_obj2nid(p7->d.digest->md->algorithm)))
+            goto err;
+        if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
+            goto err;
+        if (!ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len))
+            goto err;
+    }
+
+    if (!PKCS7_is_detached(p7)) {
+        /*
+         * NOTE(emilia): I think we only reach os == NULL here because detached
+         * digested data support is broken.
+         */
+        if (os == NULL)
+            goto err;
+        if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
+            char *cont;
+            long contlen;
+            btmp = BIO_find_type(bio, BIO_TYPE_MEM);
+            if (btmp == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
+                goto err;
+            }
+            contlen = BIO_get_mem_data(btmp, &cont);
+            /*
+             * Mark the BIO read only then we can use its copy of the data
+             * instead of making an extra copy.
+             */
+            BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
+            BIO_set_mem_eof_return(btmp, 0);
+            ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
+        }
+    }
+    ret = 1;
+ err:
+    EVP_MD_CTX_free(ctx_tmp);
+    return (ret);
+}
+
+int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
+{
+    EVP_MD_CTX *mctx;
+    EVP_PKEY_CTX *pctx;
+    unsigned char *abuf = NULL;
+    int alen;
+    size_t siglen;
+    const EVP_MD *md = NULL;
+
+    md = EVP_get_digestbyobj(si->digest_alg->algorithm);
+    if (md == NULL)
+        return 0;
+
+    mctx = EVP_MD_CTX_new();
+    if (mctx == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
+        goto err;
+
+    if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
+                          EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
+        goto err;
+    }
+
+    alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
+                         ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
+    if (!abuf)
+        goto err;
+    if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
+        goto err;
+    OPENSSL_free(abuf);
+    abuf = NULL;
+    if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
+        goto err;
+    abuf = OPENSSL_malloc(siglen);
+    if (abuf == NULL)
+        goto err;
+    if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
+        goto err;
+
+    if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
+                          EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
+        goto err;
+    }
+
+    EVP_MD_CTX_free(mctx);
+
+    ASN1_STRING_set0(si->enc_digest, abuf, siglen);
+
+    return 1;
+
+ err:
+    OPENSSL_free(abuf);
+    EVP_MD_CTX_free(mctx);
+    return 0;
+
+}
+
+int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
+                     PKCS7 *p7, PKCS7_SIGNER_INFO *si)
+{
+    PKCS7_ISSUER_AND_SERIAL *ias;
+    int ret = 0, i;
+    STACK_OF(X509) *cert;
+    X509 *x509;
+
+    if (p7 == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
+        return 0;
+    }
+
+    if (p7->d.ptr == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
+        return 0;
+    }
+
+    if (PKCS7_type_is_signed(p7)) {
+        cert = p7->d.sign->cert;
+    } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
+        cert = p7->d.signed_and_enveloped->cert;
+    } else {
+        PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
+        goto err;
+    }
+    /* XXXXXXXXXXXXXXXXXXXXXXX */
+    ias = si->issuer_and_serial;
+
+    x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
+
+    /* were we able to find the cert in passed to us */
+    if (x509 == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
+                 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
+        goto err;
+    }
+
+    /* Lets verify */
+    if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
+        PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
+        goto err;
+    }
+    X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
+    i = X509_verify_cert(ctx);
+    if (i <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
+        X509_STORE_CTX_cleanup(ctx);
+        goto err;
+    }
+    X509_STORE_CTX_cleanup(ctx);
+
+    return PKCS7_signatureVerify(bio, p7, si, x509);
+ err:
+    return ret;
+}
+
+int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
+                          X509 *x509)
+{
+    ASN1_OCTET_STRING *os;
+    EVP_MD_CTX *mdc_tmp, *mdc;
+    int ret = 0, i;
+    int md_type;
+    STACK_OF(X509_ATTRIBUTE) *sk;
+    BIO *btmp;
+    EVP_PKEY *pkey;
+
+    mdc_tmp = EVP_MD_CTX_new();
+    if (mdc_tmp == NULL) {
+        PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
+        PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
+        goto err;
+    }
+
+    md_type = OBJ_obj2nid(si->digest_alg->algorithm);
+
+    btmp = bio;
+    for (;;) {
+        if ((btmp == NULL) ||
+            ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
+            PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
+                     PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
+            goto err;
+        }
+        BIO_get_md_ctx(btmp, &mdc);
+        if (mdc == NULL) {
+            PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
+            goto err;
+        }
+        if (EVP_MD_CTX_type(mdc) == md_type)
+            break;
+        /*
+         * Workaround for some broken clients that put the signature OID
+         * instead of the digest OID in digest_alg->algorithm
+         */
+        if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
+            break;
+        btmp = BIO_next(btmp);
+    }
+
+    /*
+     * mdc is the digest ctx that we want, unless there are attributes, in
+     * which case the digest is the signed attributes
+     */
+    if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc))
+        goto err;
+
+    sk = si->auth_attr;
+    if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
+        unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
+        unsigned int md_len;
+        int alen;
+        ASN1_OCTET_STRING *message_digest;
+
+        if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len))
+            goto err;
+        message_digest = PKCS7_digest_from_attributes(sk);
+        if (!message_digest) {
+            PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
+                     PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
+            goto err;
+        }
+        if ((message_digest->length != (int)md_len) ||
+            (memcmp(message_digest->data, md_dat, md_len))) {
+            PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
+            ret = -1;
+            goto err;
+        }
+
+        if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL))
+            goto err;
+
+        alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
+                             ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
+        if (alen <= 0) {
+            PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
+            ret = -1;
+            goto err;
+        }
+        if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen))
+            goto err;
+
+        OPENSSL_free(abuf);
+    }
+
+    os = si->enc_digest;
+    pkey = X509_get0_pubkey(x509);
+    if (!pkey) {
+        ret = -1;
+        goto err;
+    }
+
+    i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey);
+    if (i <= 0) {
+        PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
+        ret = -1;
+        goto err;
+    }
+    ret = 1;
+ err:
+    EVP_MD_CTX_free(mdc_tmp);
+    return (ret);
+}
+
+PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
+{
+    STACK_OF(PKCS7_RECIP_INFO) *rsk;
+    PKCS7_RECIP_INFO *ri;
+    int i;
+
+    i = OBJ_obj2nid(p7->type);
+    if (i != NID_pkcs7_signedAndEnveloped)
+        return NULL;
+    if (p7->d.signed_and_enveloped == NULL)
+        return NULL;
+    rsk = p7->d.signed_and_enveloped->recipientinfo;
+    if (rsk == NULL)
+        return NULL;
+    if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
+        return (NULL);
+    ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
+    return (ri->issuer_and_serial);
+}
+
+ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
+{
+    return (get_attribute(si->auth_attr, nid));
+}
+
+ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
+{
+    return (get_attribute(si->unauth_attr, nid));
+}
+
+static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
+{
+    int idx;
+    X509_ATTRIBUTE *xa;
+    idx = X509at_get_attr_by_NID(sk, nid, -1);
+    xa = X509at_get_attr(sk, idx);
+    return X509_ATTRIBUTE_get0_type(xa, 0);
+}
+
+ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
+{
+    ASN1_TYPE *astype;
+    if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL)
+        return NULL;
+    return astype->value.octet_string;
+}
+
+int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
+                                STACK_OF(X509_ATTRIBUTE) *sk)
+{
+    int i;
+
+    sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
+    p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
+    if (p7si->auth_attr == NULL)
+        return 0;
+    for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
+        if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
+                                   X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
+                                                      (sk, i))))
+            == NULL)
+            return (0);
+    }
+    return (1);
+}
+
+int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
+                         STACK_OF(X509_ATTRIBUTE) *sk)
+{
+    int i;
+
+    sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
+    p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
+    if (p7si->unauth_attr == NULL)
+        return 0;
+    for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
+        if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
+                                   X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
+                                                      (sk, i))))
+            == NULL)
+            return (0);
+    }
+    return (1);
+}
+
+int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
+                               void *value)
+{
+    return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
+}
+
+int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
+                        void *value)
+{
+    return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
+}
+
+static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
+                         void *value)
+{
+    X509_ATTRIBUTE *attr = NULL;
+
+    if (*sk == NULL) {
+        if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
+            return 0;
+ new_attrib:
+        if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL)
+            return 0;
+        if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
+            X509_ATTRIBUTE_free(attr);
+            return 0;
+        }
+    } else {
+        int i;
+
+        for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
+            attr = sk_X509_ATTRIBUTE_value(*sk, i);
+            if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) {
+                X509_ATTRIBUTE_free(attr);
+                attr = X509_ATTRIBUTE_create(nid, atrtype, value);
+                if (attr == NULL)
+                    return 0;
+                if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
+                    X509_ATTRIBUTE_free(attr);
+                    return 0;
+                }
+                goto end;
+            }
+        }
+        goto new_attrib;
+    }
+ end:
+    return (1);
+}