diff options
Diffstat (limited to 'roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/tasn_utl.c')
| -rw-r--r-- | roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/tasn_utl.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/tasn_utl.c b/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/tasn_utl.c new file mode 100644 index 000000000..a448685e1 --- /dev/null +++ b/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/tasn_utl.c @@ -0,0 +1,253 @@ +/* + * Copyright 2000-2018 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 <stddef.h> +#include <string.h> +#include "internal/cryptlib.h" +#include "internal/refcount.h" +#include <openssl/asn1.h> +#include <openssl/asn1t.h> +#include <openssl/objects.h> +#include <openssl/err.h> +#include "asn1_local.h" + +/* Utility functions for manipulating fields and offsets */ + +/* Add 'offset' to 'addr' */ +#define offset2ptr(addr, offset) (void *)(((char *) addr) + offset) + +/* + * Given an ASN1_ITEM CHOICE type return the selector value + */ + +int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) +{ + int *sel = offset2ptr(*pval, it->utype); + return *sel; +} + +/* + * Given an ASN1_ITEM CHOICE type set the selector value, return old value. + */ + +int asn1_set_choice_selector(ASN1_VALUE **pval, int value, + const ASN1_ITEM *it) +{ + int *sel, ret; + sel = offset2ptr(*pval, it->utype); + ret = *sel; + *sel = value; + return ret; +} + +/* + * Do atomic reference counting. The value 'op' decides what to do. + * If it is +1 then the count is incremented. + * If |op| is 0, lock is initialised and count is set to 1. + * If |op| is -1, count is decremented and the return value is the current + * reference count or 0 if no reference count is active. + * It returns -1 on initialisation error. + * Used by ASN1_SEQUENCE construct of X509, X509_REQ, X509_CRL objects + */ +int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) +{ + const ASN1_AUX *aux; + CRYPTO_REF_COUNT *lck; + CRYPTO_RWLOCK **lock; + int ret = -1; + + if ((it->itype != ASN1_ITYPE_SEQUENCE) + && (it->itype != ASN1_ITYPE_NDEF_SEQUENCE)) + return 0; + aux = it->funcs; + if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) + return 0; + lck = offset2ptr(*pval, aux->ref_offset); + lock = offset2ptr(*pval, aux->ref_lock); + + switch (op) { + case 0: + *lck = ret = 1; + *lock = CRYPTO_THREAD_lock_new(); + if (*lock == NULL) { + ASN1err(ASN1_F_ASN1_DO_LOCK, ERR_R_MALLOC_FAILURE); + return -1; + } + break; + case 1: + if (!CRYPTO_UP_REF(lck, &ret, *lock)) + return -1; + break; + case -1: + if (!CRYPTO_DOWN_REF(lck, &ret, *lock)) + return -1; /* failed */ +#ifdef REF_PRINT + fprintf(stderr, "%p:%4d:%s\n", it, ret, it->sname); +#endif + REF_ASSERT_ISNT(ret < 0); + if (ret == 0) { + CRYPTO_THREAD_lock_free(*lock); + *lock = NULL; + } + break; + } + + return ret; +} + +static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) +{ + const ASN1_AUX *aux; + if (!pval || !*pval) + return NULL; + aux = it->funcs; + if (!aux || !(aux->flags & ASN1_AFLG_ENCODING)) + return NULL; + return offset2ptr(*pval, aux->enc_offset); +} + +void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) +{ + ASN1_ENCODING *enc; + enc = asn1_get_enc_ptr(pval, it); + if (enc) { + enc->enc = NULL; + enc->len = 0; + enc->modified = 1; + } +} + +void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) +{ + ASN1_ENCODING *enc; + enc = asn1_get_enc_ptr(pval, it); + if (enc) { + OPENSSL_free(enc->enc); + enc->enc = NULL; + enc->len = 0; + enc->modified = 1; + } +} + +int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, + const ASN1_ITEM *it) +{ + ASN1_ENCODING *enc; + enc = asn1_get_enc_ptr(pval, it); + if (!enc) + return 1; + + OPENSSL_free(enc->enc); + if ((enc->enc = OPENSSL_malloc(inlen)) == NULL) { + ASN1err(ASN1_F_ASN1_ENC_SAVE, ERR_R_MALLOC_FAILURE); + return 0; + } + memcpy(enc->enc, in, inlen); + enc->len = inlen; + enc->modified = 0; + + return 1; +} + +int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, + const ASN1_ITEM *it) +{ + ASN1_ENCODING *enc; + enc = asn1_get_enc_ptr(pval, it); + if (!enc || enc->modified) + return 0; + if (out) { + memcpy(*out, enc->enc, enc->len); + *out += enc->len; + } + if (len) + *len = enc->len; + return 1; +} + +/* Given an ASN1_TEMPLATE get a pointer to a field */ +ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) +{ + ASN1_VALUE **pvaltmp; + pvaltmp = offset2ptr(*pval, tt->offset); + /* + * NOTE for BOOLEAN types the field is just a plain int so we can't + * return int **, so settle for (int *). + */ + return pvaltmp; +} + +/* + * Handle ANY DEFINED BY template, find the selector, look up the relevant + * ASN1_TEMPLATE in the table and return it. + */ + +const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, + int nullerr) +{ + const ASN1_ADB *adb; + const ASN1_ADB_TABLE *atbl; + long selector; + ASN1_VALUE **sfld; + int i; + if (!(tt->flags & ASN1_TFLG_ADB_MASK)) + return tt; + + /* Else ANY DEFINED BY ... get the table */ + adb = ASN1_ADB_ptr(tt->item); + + /* Get the selector field */ + sfld = offset2ptr(*pval, adb->offset); + + /* Check if NULL */ + if (*sfld == NULL) { + if (!adb->null_tt) + goto err; + return adb->null_tt; + } + + /* + * Convert type to a long: NB: don't check for NID_undef here because it + * might be a legitimate value in the table + */ + if (tt->flags & ASN1_TFLG_ADB_OID) + selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld); + else + selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld); + + /* Let application callback translate value */ + if (adb->adb_cb != NULL && adb->adb_cb(&selector) == 0) { + ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); + return NULL; + } + + /* + * Try to find matching entry in table Maybe should check application + * types first to allow application override? Might also be useful to + * have a flag which indicates table is sorted and we can do a binary + * search. For now stick to a linear search. + */ + + for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) + if (atbl->value == selector) + return &atbl->tt; + + /* FIXME: need to search application table too */ + + /* No match, return default type */ + if (!adb->default_tt) + goto err; + return adb->default_tt; + + err: + /* FIXME: should log the value or OID of unsupported type */ + if (nullerr) + ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); + return NULL; +} |