diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/asn1/asn1_lib.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/asn1/asn1_lib.c | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/asn1/asn1_lib.c b/openssl-1.1.0h/crypto/asn1/asn1_lib.c new file mode 100644 index 0000000..8ca53b4 --- /dev/null +++ b/openssl-1.1.0h/crypto/asn1/asn1_lib.c @@ -0,0 +1,384 @@ +/* + * 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/asn1.h> +#include "asn1_locl.h" + +static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, + long max); +static void asn1_put_length(unsigned char **pp, int length); + +static int _asn1_check_infinite_end(const unsigned char **p, long len) +{ + /* + * If there is 0 or 1 byte left, the length check should pick things up + */ + if (len <= 0) + return (1); + else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) { + (*p) += 2; + return (1); + } + return (0); +} + +int ASN1_check_infinite_end(unsigned char **p, long len) +{ + return _asn1_check_infinite_end((const unsigned char **)p, len); +} + +int ASN1_const_check_infinite_end(const unsigned char **p, long len) +{ + return _asn1_check_infinite_end(p, len); +} + +int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag, + int *pclass, long omax) +{ + int i, ret; + long l; + const unsigned char *p = *pp; + int tag, xclass, inf; + long max = omax; + + if (!max) + goto err; + ret = (*p & V_ASN1_CONSTRUCTED); + xclass = (*p & V_ASN1_PRIVATE); + i = *p & V_ASN1_PRIMITIVE_TAG; + if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */ + p++; + if (--max == 0) + goto err; + l = 0; + while (*p & 0x80) { + l <<= 7L; + l |= *(p++) & 0x7f; + if (--max == 0) + goto err; + if (l > (INT_MAX >> 7L)) + goto err; + } + l <<= 7L; + l |= *(p++) & 0x7f; + tag = (int)l; + if (--max == 0) + goto err; + } else { + tag = i; + p++; + if (--max == 0) + goto err; + } + *ptag = tag; + *pclass = xclass; + if (!asn1_get_length(&p, &inf, plength, max)) + goto err; + + if (inf && !(ret & V_ASN1_CONSTRUCTED)) + goto err; + + if (*plength > (omax - (p - *pp))) { + ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_TOO_LONG); + /* + * Set this so that even if things are not long enough the values are + * set correctly + */ + ret |= 0x80; + } + *pp = p; + return (ret | inf); + err: + ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_HEADER_TOO_LONG); + return (0x80); +} + +static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, + long max) +{ + const unsigned char *p = *pp; + unsigned long ret = 0; + unsigned long i; + + if (max-- < 1) + return 0; + if (*p == 0x80) { + *inf = 1; + ret = 0; + p++; + } else { + *inf = 0; + i = *p & 0x7f; + if (*(p++) & 0x80) { + if (max < (long)i + 1) + return 0; + /* Skip leading zeroes */ + while (i && *p == 0) { + p++; + i--; + } + if (i > sizeof(long)) + return 0; + while (i-- > 0) { + ret <<= 8L; + ret |= *(p++); + } + } else + ret = i; + } + if (ret > LONG_MAX) + return 0; + *pp = p; + *rl = (long)ret; + return 1; +} + +/* + * class 0 is constructed constructed == 2 for indefinite length constructed + */ +void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag, + int xclass) +{ + unsigned char *p = *pp; + int i, ttag; + + i = (constructed) ? V_ASN1_CONSTRUCTED : 0; + i |= (xclass & V_ASN1_PRIVATE); + if (tag < 31) + *(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG); + else { + *(p++) = i | V_ASN1_PRIMITIVE_TAG; + for (i = 0, ttag = tag; ttag > 0; i++) + ttag >>= 7; + ttag = i; + while (i-- > 0) { + p[i] = tag & 0x7f; + if (i != (ttag - 1)) + p[i] |= 0x80; + tag >>= 7; + } + p += ttag; + } + if (constructed == 2) + *(p++) = 0x80; + else + asn1_put_length(&p, length); + *pp = p; +} + +int ASN1_put_eoc(unsigned char **pp) +{ + unsigned char *p = *pp; + *p++ = 0; + *p++ = 0; + *pp = p; + return 2; +} + +static void asn1_put_length(unsigned char **pp, int length) +{ + unsigned char *p = *pp; + int i, l; + if (length <= 127) + *(p++) = (unsigned char)length; + else { + l = length; + for (i = 0; l > 0; i++) + l >>= 8; + *(p++) = i | 0x80; + l = i; + while (i-- > 0) { + p[i] = length & 0xff; + length >>= 8; + } + p += l; + } + *pp = p; +} + +int ASN1_object_size(int constructed, int length, int tag) +{ + int ret = 1; + if (length < 0) + return -1; + if (tag >= 31) { + while (tag > 0) { + tag >>= 7; + ret++; + } + } + if (constructed == 2) { + ret += 3; + } else { + ret++; + if (length > 127) { + int tmplen = length; + while (tmplen > 0) { + tmplen >>= 8; + ret++; + } + } + } + if (ret >= INT_MAX - length) + return -1; + return ret + length; +} + +int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str) +{ + if (str == NULL) + return 0; + dst->type = str->type; + if (!ASN1_STRING_set(dst, str->data, str->length)) + return 0; + /* Copy flags but preserve embed value */ + dst->flags &= ASN1_STRING_FLAG_EMBED; + dst->flags |= str->flags & ~ASN1_STRING_FLAG_EMBED; + return 1; +} + +ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str) +{ + ASN1_STRING *ret; + if (!str) + return NULL; + ret = ASN1_STRING_new(); + if (ret == NULL) + return NULL; + if (!ASN1_STRING_copy(ret, str)) { + ASN1_STRING_free(ret); + return NULL; + } + return ret; +} + +int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len) +{ + unsigned char *c; + const char *data = _data; + + if (len < 0) { + if (data == NULL) + return (0); + else + len = strlen(data); + } + if ((str->length <= len) || (str->data == NULL)) { + c = str->data; + str->data = OPENSSL_realloc(c, len + 1); + if (str->data == NULL) { + ASN1err(ASN1_F_ASN1_STRING_SET, ERR_R_MALLOC_FAILURE); + str->data = c; + return (0); + } + } + str->length = len; + if (data != NULL) { + memcpy(str->data, data, len); + /* an allowance for strings :-) */ + str->data[len] = '\0'; + } + return (1); +} + +void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len) +{ + OPENSSL_free(str->data); + str->data = data; + str->length = len; +} + +ASN1_STRING *ASN1_STRING_new(void) +{ + return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING)); +} + +ASN1_STRING *ASN1_STRING_type_new(int type) +{ + ASN1_STRING *ret; + + ret = OPENSSL_zalloc(sizeof(*ret)); + if (ret == NULL) { + ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW, ERR_R_MALLOC_FAILURE); + return (NULL); + } + ret->type = type; + return (ret); +} + +void asn1_string_embed_free(ASN1_STRING *a, int embed) +{ + if (a == NULL) + return; + if (!(a->flags & ASN1_STRING_FLAG_NDEF)) + OPENSSL_free(a->data); + if (embed == 0) + OPENSSL_free(a); +} + +void ASN1_STRING_free(ASN1_STRING *a) +{ + if (a == NULL) + return; + asn1_string_embed_free(a, a->flags & ASN1_STRING_FLAG_EMBED); +} + +void ASN1_STRING_clear_free(ASN1_STRING *a) +{ + if (a == NULL) + return; + if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF)) + OPENSSL_cleanse(a->data, a->length); + ASN1_STRING_free(a); +} + +int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b) +{ + int i; + + i = (a->length - b->length); + if (i == 0) { + i = memcmp(a->data, b->data, a->length); + if (i == 0) + return (a->type - b->type); + else + return (i); + } else + return (i); +} + +int ASN1_STRING_length(const ASN1_STRING *x) +{ + return x->length; +} + +void ASN1_STRING_length_set(ASN1_STRING *x, int len) +{ + x->length = len; +} + +int ASN1_STRING_type(const ASN1_STRING *x) +{ + return x->type; +} + +const unsigned char *ASN1_STRING_get0_data(const ASN1_STRING *x) +{ + return x->data; +} + +# if OPENSSL_API_COMPAT < 0x10100000L +unsigned char *ASN1_STRING_data(ASN1_STRING *x) +{ + return x->data; +} +#endif |