| // Copyright 2014 The BoringSSL Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef OPENSSL_HEADER_BYTESTRING_INTERNAL_H |
| #define OPENSSL_HEADER_BYTESTRING_INTERNAL_H |
| |
| #include <openssl/base.h> |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| |
| // CBS_asn1_ber_to_der reads a BER element from |in|. If it finds |
| // indefinite-length elements or constructed strings then it converts the BER |
| // data to DER, sets |out| to the converted contents and |*out_storage| to a |
| // buffer which the caller must release with |OPENSSL_free|. Otherwise, it sets |
| // |out| to the original BER element in |in| and |*out_storage| to NULL. |
| // Additionally, |*in| will be advanced over the BER element. |
| // |
| // This function should successfully process any valid BER input, however it |
| // will not convert all of BER's deviations from DER. BER is ambiguous between |
| // implicitly-tagged SEQUENCEs of strings and implicitly-tagged constructed |
| // strings. Implicitly-tagged strings must be parsed with |
| // |CBS_get_ber_implicitly_tagged_string| instead of |CBS_get_asn1|. The caller |
| // must also account for BER variations in the contents of a primitive. |
| // |
| // It returns one on success and zero otherwise. |
| OPENSSL_EXPORT int CBS_asn1_ber_to_der(CBS *in, CBS *out, |
| uint8_t **out_storage); |
| |
| // CBS_get_asn1_implicit_string parses a BER string of primitive type |
| // |inner_tag| implicitly-tagged with |outer_tag|. It sets |out| to the |
| // contents. If concatenation was needed, it sets |*out_storage| to a buffer |
| // which the caller must release with |OPENSSL_free|. Otherwise, it sets |
| // |*out_storage| to NULL. |
| // |
| // This function does not parse all of BER. It requires the string be |
| // definite-length. Constructed strings are allowed, but all children of the |
| // outermost element must be primitive. The caller should use |
| // |CBS_asn1_ber_to_der| before running this function. |
| // |
| // It returns one on success and zero otherwise. |
| OPENSSL_EXPORT int CBS_get_asn1_implicit_string(CBS *in, CBS *out, |
| uint8_t **out_storage, |
| CBS_ASN1_TAG outer_tag, |
| CBS_ASN1_TAG inner_tag); |
| |
| // CBB_finish_i2d calls |CBB_finish| on |cbb| which must have been initialized |
| // with |CBB_init|. If |outp| is not NULL then the result is written to |*outp| |
| // and |*outp| is advanced just past the output. It returns the number of bytes |
| // in the result, whether written or not, or a negative value on error. On |
| // error, it calls |CBB_cleanup| on |cbb|. |
| // |
| // This function may be used to help implement legacy i2d ASN.1 functions. |
| int CBB_finish_i2d(CBB *cbb, uint8_t **outp); |
| |
| |
| #if defined(__cplusplus) |
| } // extern C |
| #endif |
| |
| #endif // OPENSSL_HEADER_BYTESTRING_INTERNAL_H |