1 /* Copyright (c) 2014, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #ifndef OPENSSL_HEADER_BYTESTRING_INTERNAL_H 16 #define OPENSSL_HEADER_BYTESTRING_INTERNAL_H 17 18 #include <openssl/base.h> 19 20 #if defined(__cplusplus) 21 extern "C" { 22 #endif 23 24 25 /* CBS_asn1_ber_to_der reads a BER element from |in|. If it finds 26 * indefinite-length elements or constructed strings then it converts the BER 27 * data to DER and sets |*out| and |*out_length| to describe a malloced buffer 28 * containing the DER data. Additionally, |*in| will be advanced over the BER 29 * element. 30 * 31 * If it doesn't find any indefinite-length elements or constructed strings then 32 * it sets |*out| to NULL and |*in| is unmodified. 33 * 34 * This function should successfully process any valid BER input, however it 35 * will not convert all of BER's deviations from DER. BER is ambiguous between 36 * implicitly-tagged SEQUENCEs of strings and implicitly-tagged constructed 37 * strings. Implicitly-tagged strings must be parsed with 38 * |CBS_get_ber_implicitly_tagged_string| instead of |CBS_get_asn1|. The caller 39 * must also account for BER variations in the contents of a primitive. 40 * 41 * It returns one on success and zero otherwise. */ 42 OPENSSL_EXPORT int CBS_asn1_ber_to_der(CBS *in, uint8_t **out, size_t *out_len); 43 44 /* CBS_get_asn1_implicit_string parses a BER string of primitive type 45 * |inner_tag| implicitly-tagged with |outer_tag|. It sets |out| to the 46 * contents. If concatenation was needed, it sets |*out_storage| to a buffer 47 * which the caller must release with |OPENSSL_free|. Otherwise, it sets 48 * |*out_storage| to NULL. 49 * 50 * This function does not parse all of BER. It requires the string be 51 * definite-length. Constructed strings are allowed, but all children of the 52 * outermost element must be primitive. The caller should use 53 * |CBS_asn1_ber_to_der| before running this function. 54 * 55 * It returns one on success and zero otherwise. */ 56 OPENSSL_EXPORT int CBS_get_asn1_implicit_string(CBS *in, CBS *out, 57 uint8_t **out_storage, 58 unsigned outer_tag, 59 unsigned inner_tag); 60 61 /* CBB_finish_i2d calls |CBB_finish| on |cbb| which must have been initialized 62 * with |CBB_init|. If |outp| is not NULL then the result is written to |*outp| 63 * and |*outp| is advanced just past the output. It returns the number of bytes 64 * in the result, whether written or not, or a negative value on error. On 65 * error, it calls |CBB_cleanup| on |cbb|. 66 * 67 * This function may be used to help implement legacy i2d ASN.1 functions. */ 68 int CBB_finish_i2d(CBB *cbb, uint8_t **outp); 69 70 71 #if defined(__cplusplus) 72 } /* extern C */ 73 #endif 74 75 #endif /* OPENSSL_HEADER_BYTESTRING_INTERNAL_H */ 76
