diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/asn1/a_object.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/asn1/a_object.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/asn1/a_object.c b/openssl-1.1.0h/crypto/asn1/a_object.c new file mode 100644 index 0000000..1ec7a7e --- /dev/null +++ b/openssl-1.1.0h/crypto/asn1/a_object.c @@ -0,0 +1,370 @@ +/* + * Copyright 1995-2016 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 <limits.h> +#include "internal/cryptlib.h" +#include <openssl/buffer.h> +#include <openssl/asn1.h> +#include <openssl/objects.h> +#include <openssl/bn.h> +#include "internal/asn1_int.h" +#include "asn1_locl.h" + +int i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp) +{ + unsigned char *p; + int objsize; + + if ((a == NULL) || (a->data == NULL)) + return (0); + + objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT); + if (pp == NULL || objsize == -1) + return objsize; + + p = *pp; + ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL); + memcpy(p, a->data, a->length); + p += a->length; + + *pp = p; + return (objsize); +} + +int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num) +{ + int i, first, len = 0, c, use_bn; + char ftmp[24], *tmp = ftmp; + int tmpsize = sizeof(ftmp); + const char *p; + unsigned long l; + BIGNUM *bl = NULL; + + if (num == 0) + return (0); + else if (num == -1) + num = strlen(buf); + + p = buf; + c = *(p++); + num--; + if ((c >= '0') && (c <= '2')) { + first = c - '0'; + } else { + ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_FIRST_NUM_TOO_LARGE); + goto err; + } + + if (num <= 0) { + ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_MISSING_SECOND_NUMBER); + goto err; + } + c = *(p++); + num--; + for (;;) { + if (num <= 0) + break; + if ((c != '.') && (c != ' ')) { + ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_INVALID_SEPARATOR); + goto err; + } + l = 0; + use_bn = 0; + for (;;) { + if (num <= 0) + break; + num--; + c = *(p++); + if ((c == ' ') || (c == '.')) + break; + if ((c < '0') || (c > '9')) { + ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_INVALID_DIGIT); + goto err; + } + if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) { + use_bn = 1; + if (bl == NULL) + bl = BN_new(); + if (bl == NULL || !BN_set_word(bl, l)) + goto err; + } + if (use_bn) { + if (!BN_mul_word(bl, 10L) + || !BN_add_word(bl, c - '0')) + goto err; + } else + l = l * 10L + (long)(c - '0'); + } + if (len == 0) { + if ((first < 2) && (l >= 40)) { + ASN1err(ASN1_F_A2D_ASN1_OBJECT, + ASN1_R_SECOND_NUMBER_TOO_LARGE); + goto err; + } + if (use_bn) { + if (!BN_add_word(bl, first * 40)) + goto err; + } else + l += (long)first *40; + } + i = 0; + if (use_bn) { + int blsize; + blsize = BN_num_bits(bl); + blsize = (blsize + 6) / 7; + if (blsize > tmpsize) { + if (tmp != ftmp) + OPENSSL_free(tmp); + tmpsize = blsize + 32; + tmp = OPENSSL_malloc(tmpsize); + if (tmp == NULL) + goto err; + } + while (blsize--) { + BN_ULONG t = BN_div_word(bl, 0x80L); + if (t == (BN_ULONG)-1) + goto err; + tmp[i++] = (unsigned char)t; + } + } else { + + for (;;) { + tmp[i++] = (unsigned char)l & 0x7f; + l >>= 7L; + if (l == 0L) + break; + } + + } + if (out != NULL) { + if (len + i > olen) { + ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_BUFFER_TOO_SMALL); + goto err; + } + while (--i > 0) + out[len++] = tmp[i] | 0x80; + out[len++] = tmp[0]; + } else + len += i; + } + if (tmp != ftmp) + OPENSSL_free(tmp); + BN_free(bl); + return (len); + err: + if (tmp != ftmp) + OPENSSL_free(tmp); + BN_free(bl); + return (0); +} + +int i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *a) +{ + return OBJ_obj2txt(buf, buf_len, a, 0); +} + +int i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a) +{ + char buf[80], *p = buf; + int i; + + if ((a == NULL) || (a->data == NULL)) + return (BIO_write(bp, "NULL", 4)); + i = i2t_ASN1_OBJECT(buf, sizeof(buf), a); + if (i > (int)(sizeof(buf) - 1)) { + p = OPENSSL_malloc(i + 1); + if (p == NULL) + return -1; + i2t_ASN1_OBJECT(p, i + 1, a); + } + if (i <= 0) { + i = BIO_write(bp, "<INVALID>", 9); + i += BIO_dump(bp, (const char *)a->data, a->length); + return i; + } + BIO_write(bp, p, i); + if (p != buf) + OPENSSL_free(p); + return (i); +} + +ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, + long length) +{ + const unsigned char *p; + long len; + int tag, xclass; + int inf, i; + ASN1_OBJECT *ret = NULL; + p = *pp; + inf = ASN1_get_object(&p, &len, &tag, &xclass, length); + if (inf & 0x80) { + i = ASN1_R_BAD_OBJECT_HEADER; + goto err; + } + + if (tag != V_ASN1_OBJECT) { + i = ASN1_R_EXPECTING_AN_OBJECT; + goto err; + } + ret = c2i_ASN1_OBJECT(a, &p, len); + if (ret) + *pp = p; + return ret; + err: + ASN1err(ASN1_F_D2I_ASN1_OBJECT, i); + return (NULL); +} + +ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, + long len) +{ + ASN1_OBJECT *ret = NULL, tobj; + const unsigned char *p; + unsigned char *data; + int i, length; + + /* + * Sanity check OID encoding. Need at least one content octet. MSB must + * be clear in the last octet. can't have leading 0x80 in subidentifiers, + * see: X.690 8.19.2 + */ + if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL || + p[len - 1] & 0x80) { + ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING); + return NULL; + } + /* Now 0 < len <= INT_MAX, so the cast is safe. */ + length = (int)len; + /* + * Try to lookup OID in table: these are all valid encodings so if we get + * a match we know the OID is valid. + */ + tobj.nid = NID_undef; + tobj.data = p; + tobj.length = length; + tobj.flags = 0; + i = OBJ_obj2nid(&tobj); + if (i != NID_undef) { + /* + * Return shared registered OID object: this improves efficiency + * because we don't have to return a dynamically allocated OID + * and NID lookups can use the cached value. + */ + ret = OBJ_nid2obj(i); + if (a) { + ASN1_OBJECT_free(*a); + *a = ret; + } + *pp += len; + return ret; + } + for (i = 0; i < length; i++, p++) { + if (*p == 0x80 && (!i || !(p[-1] & 0x80))) { + ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING); + return NULL; + } + } + + /* + * only the ASN1_OBJECTs from the 'table' will have values for ->sn or + * ->ln + */ + if ((a == NULL) || ((*a) == NULL) || + !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) { + if ((ret = ASN1_OBJECT_new()) == NULL) + return (NULL); + } else + ret = (*a); + + p = *pp; + /* detach data from object */ + data = (unsigned char *)ret->data; + ret->data = NULL; + /* once detached we can change it */ + if ((data == NULL) || (ret->length < length)) { + ret->length = 0; + OPENSSL_free(data); + data = OPENSSL_malloc(length); + if (data == NULL) { + i = ERR_R_MALLOC_FAILURE; + goto err; + } + ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA; + } + memcpy(data, p, length); + /* reattach data to object, after which it remains const */ + ret->data = data; + ret->length = length; + ret->sn = NULL; + ret->ln = NULL; + /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */ + p += length; + + if (a != NULL) + (*a) = ret; + *pp = p; + return (ret); + err: + ASN1err(ASN1_F_C2I_ASN1_OBJECT, i); + if ((a == NULL) || (*a != ret)) + ASN1_OBJECT_free(ret); + return (NULL); +} + +ASN1_OBJECT *ASN1_OBJECT_new(void) +{ + ASN1_OBJECT *ret; + + ret = OPENSSL_zalloc(sizeof(*ret)); + if (ret == NULL) { + ASN1err(ASN1_F_ASN1_OBJECT_NEW, ERR_R_MALLOC_FAILURE); + return (NULL); + } + ret->flags = ASN1_OBJECT_FLAG_DYNAMIC; + return (ret); +} + +void ASN1_OBJECT_free(ASN1_OBJECT *a) +{ + if (a == NULL) + return; + if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) { +#ifndef CONST_STRICT /* disable purely for compile-time strict + * const checking. Doing this on a "real" + * compile will cause memory leaks */ + OPENSSL_free((void*)a->sn); + OPENSSL_free((void*)a->ln); +#endif + a->sn = a->ln = NULL; + } + if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) { + OPENSSL_free((void*)a->data); + a->data = NULL; + a->length = 0; + } + if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC) + OPENSSL_free(a); +} + +ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len, + const char *sn, const char *ln) +{ + ASN1_OBJECT o; + + o.sn = sn; + o.ln = ln; + o.data = data; + o.nid = nid; + o.length = len; + o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | + ASN1_OBJECT_FLAG_DYNAMIC_DATA; + return (OBJ_dup(&o)); +} |