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518 lines
18 KiB
518 lines
18 KiB
/* |
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* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. |
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* |
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* Licensed under the OpenSSL license (the "License"). You may not use |
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* this file except in compliance with the License. You can obtain a copy |
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* in the file LICENSE in the source distribution or at |
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* https://www.openssl.org/source/license.html |
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*/ |
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|
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#ifndef HEADER_CT_H |
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# define HEADER_CT_H |
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|
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# include <openssl/opensslconf.h> |
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|
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# ifndef OPENSSL_NO_CT |
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# include <openssl/ossl_typ.h> |
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# include <openssl/safestack.h> |
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# include <openssl/x509.h> |
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# ifdef __cplusplus |
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extern "C" { |
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# endif |
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|
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/* Minimum RSA key size, from RFC6962 */ |
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# define SCT_MIN_RSA_BITS 2048 |
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/* All hashes are SHA256 in v1 of Certificate Transparency */ |
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# define CT_V1_HASHLEN SHA256_DIGEST_LENGTH |
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typedef enum { |
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CT_LOG_ENTRY_TYPE_NOT_SET = -1, |
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CT_LOG_ENTRY_TYPE_X509 = 0, |
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CT_LOG_ENTRY_TYPE_PRECERT = 1 |
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} ct_log_entry_type_t; |
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typedef enum { |
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SCT_VERSION_NOT_SET = -1, |
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SCT_VERSION_V1 = 0 |
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} sct_version_t; |
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typedef enum { |
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SCT_SOURCE_UNKNOWN, |
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SCT_SOURCE_TLS_EXTENSION, |
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SCT_SOURCE_X509V3_EXTENSION, |
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SCT_SOURCE_OCSP_STAPLED_RESPONSE |
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} sct_source_t; |
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typedef enum { |
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SCT_VALIDATION_STATUS_NOT_SET, |
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SCT_VALIDATION_STATUS_UNKNOWN_LOG, |
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SCT_VALIDATION_STATUS_VALID, |
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SCT_VALIDATION_STATUS_INVALID, |
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SCT_VALIDATION_STATUS_UNVERIFIED, |
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SCT_VALIDATION_STATUS_UNKNOWN_VERSION |
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} sct_validation_status_t; |
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DEFINE_STACK_OF(SCT) |
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DEFINE_STACK_OF(CTLOG) |
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/****************************************** |
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* CT policy evaluation context functions * |
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******************************************/ |
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/* |
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* Creates a new, empty policy evaluation context. |
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* The caller is responsible for calling CT_POLICY_EVAL_CTX_free when finished |
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* with the CT_POLICY_EVAL_CTX. |
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*/ |
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CT_POLICY_EVAL_CTX *CT_POLICY_EVAL_CTX_new(void); |
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|
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/* Deletes a policy evaluation context and anything it owns. */ |
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void CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx); |
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|
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/* Gets the peer certificate that the SCTs are for */ |
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X509* CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx); |
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|
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/* |
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* Sets the certificate associated with the received SCTs. |
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* Increments the reference count of cert. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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int CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert); |
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|
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/* Gets the issuer of the aforementioned certificate */ |
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X509* CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx); |
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/* |
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* Sets the issuer of the certificate associated with the received SCTs. |
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* Increments the reference count of issuer. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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int CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer); |
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|
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/* Gets the CT logs that are trusted sources of SCTs */ |
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const CTLOG_STORE *CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx); |
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|
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/* Sets the log store that is in use. It must outlive the CT_POLICY_EVAL_CTX. */ |
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void CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx, |
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CTLOG_STORE *log_store); |
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|
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/***************** |
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* SCT functions * |
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*****************/ |
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/* |
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* Creates a new, blank SCT. |
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* The caller is responsible for calling SCT_free when finished with the SCT. |
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*/ |
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SCT *SCT_new(void); |
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|
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/* |
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* Creates a new SCT from some base64-encoded strings. |
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* The caller is responsible for calling SCT_free when finished with the SCT. |
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*/ |
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SCT *SCT_new_from_base64(unsigned char version, |
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const char *logid_base64, |
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ct_log_entry_type_t entry_type, |
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uint64_t timestamp, |
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const char *extensions_base64, |
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const char *signature_base64); |
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|
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/* |
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* Frees the SCT and the underlying data structures. |
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*/ |
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void SCT_free(SCT *sct); |
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|
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/* |
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* Free a stack of SCTs, and the underlying SCTs themselves. |
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* Intended to be compatible with X509V3_EXT_FREE. |
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*/ |
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void SCT_LIST_free(STACK_OF(SCT) *a); |
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|
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/* |
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* Returns the version of the SCT. |
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*/ |
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sct_version_t SCT_get_version(const SCT *sct); |
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|
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/* |
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* Set the version of an SCT. |
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* Returns 1 on success, 0 if the version is unrecognized. |
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*/ |
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__owur int SCT_set_version(SCT *sct, sct_version_t version); |
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|
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/* |
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* Returns the log entry type of the SCT. |
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*/ |
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ct_log_entry_type_t SCT_get_log_entry_type(const SCT *sct); |
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|
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/* |
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* Set the log entry type of an SCT. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set_log_entry_type(SCT *sct, ct_log_entry_type_t entry_type); |
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/* |
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* Gets the ID of the log that an SCT came from. |
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* Ownership of the log ID remains with the SCT. |
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* Returns the length of the log ID. |
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*/ |
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size_t SCT_get0_log_id(const SCT *sct, unsigned char **log_id); |
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/* |
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* Set the log ID of an SCT to point directly to the *log_id specified. |
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* The SCT takes ownership of the specified pointer. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set0_log_id(SCT *sct, unsigned char *log_id, size_t log_id_len); |
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/* |
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* Set the log ID of an SCT. |
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* This makes a copy of the log_id. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set1_log_id(SCT *sct, const unsigned char *log_id, |
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size_t log_id_len); |
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|
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/* |
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* Returns the timestamp for the SCT (epoch time in milliseconds). |
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*/ |
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uint64_t SCT_get_timestamp(const SCT *sct); |
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/* |
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* Set the timestamp of an SCT (epoch time in milliseconds). |
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*/ |
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void SCT_set_timestamp(SCT *sct, uint64_t timestamp); |
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/* |
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* Return the NID for the signature used by the SCT. |
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* For CT v1, this will be either NID_sha256WithRSAEncryption or |
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* NID_ecdsa_with_SHA256 (or NID_undef if incorrect/unset). |
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*/ |
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int SCT_get_signature_nid(const SCT *sct); |
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/* |
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* Set the signature type of an SCT |
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* For CT v1, this should be either NID_sha256WithRSAEncryption or |
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* NID_ecdsa_with_SHA256. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set_signature_nid(SCT *sct, int nid); |
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/* |
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* Set *ext to point to the extension data for the SCT. ext must not be NULL. |
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* The SCT retains ownership of this pointer. |
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* Returns length of the data pointed to. |
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*/ |
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size_t SCT_get0_extensions(const SCT *sct, unsigned char **ext); |
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/* |
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* Set the extensions of an SCT to point directly to the *ext specified. |
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* The SCT takes ownership of the specified pointer. |
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*/ |
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void SCT_set0_extensions(SCT *sct, unsigned char *ext, size_t ext_len); |
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/* |
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* Set the extensions of an SCT. |
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* This takes a copy of the ext. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set1_extensions(SCT *sct, const unsigned char *ext, |
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size_t ext_len); |
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/* |
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* Set *sig to point to the signature for the SCT. sig must not be NULL. |
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* The SCT retains ownership of this pointer. |
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* Returns length of the data pointed to. |
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*/ |
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size_t SCT_get0_signature(const SCT *sct, unsigned char **sig); |
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/* |
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* Set the signature of an SCT to point directly to the *sig specified. |
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* The SCT takes ownership of the specified pointer. |
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*/ |
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void SCT_set0_signature(SCT *sct, unsigned char *sig, size_t sig_len); |
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/* |
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* Set the signature of an SCT to be a copy of the *sig specified. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set1_signature(SCT *sct, const unsigned char *sig, |
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size_t sig_len); |
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|
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/* |
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* The origin of this SCT, e.g. TLS extension, OCSP response, etc. |
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*/ |
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sct_source_t SCT_get_source(const SCT *sct); |
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/* |
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* Set the origin of this SCT, e.g. TLS extension, OCSP response, etc. |
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* Returns 1 on success, 0 otherwise. |
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*/ |
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__owur int SCT_set_source(SCT *sct, sct_source_t source); |
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/* |
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* Returns a text string describing the validation status of |sct|. |
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*/ |
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const char *SCT_validation_status_string(const SCT *sct); |
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/* |
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* Pretty-prints an |sct| to |out|. |
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* It will be indented by the number of spaces specified by |indent|. |
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* If |logs| is not NULL, it will be used to lookup the CT log that the SCT came |
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* from, so that the log name can be printed. |
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*/ |
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void SCT_print(const SCT *sct, BIO *out, int indent, const CTLOG_STORE *logs); |
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/* |
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* Pretty-prints an |sct_list| to |out|. |
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* It will be indented by the number of spaces specified by |indent|. |
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* SCTs will be delimited by |separator|. |
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* If |logs| is not NULL, it will be used to lookup the CT log that each SCT |
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* came from, so that the log names can be printed. |
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*/ |
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void SCT_LIST_print(const STACK_OF(SCT) *sct_list, BIO *out, int indent, |
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const char *separator, const CTLOG_STORE *logs); |
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/* |
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* Gets the last result of validating this SCT. |
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* If it has not been validated yet, returns SCT_VALIDATION_STATUS_NOT_SET. |
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*/ |
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sct_validation_status_t SCT_get_validation_status(const SCT *sct); |
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/* |
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* Validates the given SCT with the provided context. |
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* Sets the "validation_status" field of the SCT. |
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* Returns 1 if the SCT is valid and the signature verifies. |
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* Returns 0 if the SCT is invalid or could not be verified. |
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* Returns -1 if an error occurs. |
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*/ |
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__owur int SCT_validate(SCT *sct, const CT_POLICY_EVAL_CTX *ctx); |
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/* |
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* Validates the given list of SCTs with the provided context. |
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* Sets the "validation_status" field of each SCT. |
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* Returns 1 if there are no invalid SCTs and all signatures verify. |
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* Returns 0 if at least one SCT is invalid or could not be verified. |
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* Returns a negative integer if an error occurs. |
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*/ |
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__owur int SCT_LIST_validate(const STACK_OF(SCT) *scts, |
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CT_POLICY_EVAL_CTX *ctx); |
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/********************************* |
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* SCT parsing and serialisation * |
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*********************************/ |
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/* |
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* Serialize (to TLS format) a stack of SCTs and return the length. |
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* "a" must not be NULL. |
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* If "pp" is NULL, just return the length of what would have been serialized. |
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* If "pp" is not NULL and "*pp" is null, function will allocate a new pointer |
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* for data that caller is responsible for freeing (only if function returns |
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* successfully). |
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* If "pp" is NULL and "*pp" is not NULL, caller is responsible for ensuring |
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* that "*pp" is large enough to accept all of the serialized data. |
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* Returns < 0 on error, >= 0 indicating bytes written (or would have been) |
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* on success. |
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*/ |
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__owur int i2o_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp); |
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|
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/* |
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* Convert TLS format SCT list to a stack of SCTs. |
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* If "a" or "*a" is NULL, a new stack will be created that the caller is |
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* responsible for freeing (by calling SCT_LIST_free). |
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* "**pp" and "*pp" must not be NULL. |
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* Upon success, "*pp" will point to after the last bytes read, and a stack |
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* will be returned. |
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* Upon failure, a NULL pointer will be returned, and the position of "*pp" is |
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* not defined. |
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*/ |
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STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, |
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size_t len); |
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/* |
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* Serialize (to DER format) a stack of SCTs and return the length. |
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* "a" must not be NULL. |
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* If "pp" is NULL, just returns the length of what would have been serialized. |
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* If "pp" is not NULL and "*pp" is null, function will allocate a new pointer |
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* for data that caller is responsible for freeing (only if function returns |
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* successfully). |
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* If "pp" is NULL and "*pp" is not NULL, caller is responsible for ensuring |
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* that "*pp" is large enough to accept all of the serialized data. |
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* Returns < 0 on error, >= 0 indicating bytes written (or would have been) |
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* on success. |
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*/ |
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__owur int i2d_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp); |
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/* |
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* Parses an SCT list in DER format and returns it. |
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* If "a" or "*a" is NULL, a new stack will be created that the caller is |
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* responsible for freeing (by calling SCT_LIST_free). |
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* "**pp" and "*pp" must not be NULL. |
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* Upon success, "*pp" will point to after the last bytes read, and a stack |
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* will be returned. |
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* Upon failure, a NULL pointer will be returned, and the position of "*pp" is |
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* not defined. |
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*/ |
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STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, |
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long len); |
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/* |
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* Serialize (to TLS format) an |sct| and write it to |out|. |
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* If |out| is null, no SCT will be output but the length will still be returned. |
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* If |out| points to a null pointer, a string will be allocated to hold the |
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* TLS-format SCT. It is the responsibility of the caller to free it. |
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* If |out| points to an allocated string, the TLS-format SCT will be written |
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* to it. |
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* The length of the SCT in TLS format will be returned. |
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*/ |
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__owur int i2o_SCT(const SCT *sct, unsigned char **out); |
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/* |
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* Parses an SCT in TLS format and returns it. |
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* If |psct| is not null, it will end up pointing to the parsed SCT. If it |
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* already points to a non-null pointer, the pointer will be free'd. |
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* |in| should be a pointer to a string containing the TLS-format SCT. |
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* |in| will be advanced to the end of the SCT if parsing succeeds. |
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* |len| should be the length of the SCT in |in|. |
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* Returns NULL if an error occurs. |
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* If the SCT is an unsupported version, only the SCT's 'sct' and 'sct_len' |
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* fields will be populated (with |in| and |len| respectively). |
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*/ |
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SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len); |
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|
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/******************** |
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* CT log functions * |
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********************/ |
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/* |
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* Creates a new CT log instance with the given |public_key| and |name|. |
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* Takes ownership of |public_key| but copies |name|. |
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* Returns NULL if malloc fails or if |public_key| cannot be converted to DER. |
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* Should be deleted by the caller using CTLOG_free when no longer needed. |
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*/ |
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CTLOG *CTLOG_new(EVP_PKEY *public_key, const char *name); |
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/* |
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* Creates a new CTLOG instance with the base64-encoded SubjectPublicKeyInfo DER |
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* in |pkey_base64|. The |name| is a string to help users identify this log. |
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* Returns 1 on success, 0 on failure. |
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* Should be deleted by the caller using CTLOG_free when no longer needed. |
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*/ |
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int CTLOG_new_from_base64(CTLOG ** ct_log, |
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const char *pkey_base64, const char *name); |
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|
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/* |
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* Deletes a CT log instance and its fields. |
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*/ |
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void CTLOG_free(CTLOG *log); |
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|
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/* Gets the name of the CT log */ |
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const char *CTLOG_get0_name(const CTLOG *log); |
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/* Gets the ID of the CT log */ |
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void CTLOG_get0_log_id(const CTLOG *log, const uint8_t **log_id, |
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size_t *log_id_len); |
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/* Gets the public key of the CT log */ |
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EVP_PKEY *CTLOG_get0_public_key(const CTLOG *log); |
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|
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/************************** |
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* CT log store functions * |
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**************************/ |
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/* |
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* Creates a new CT log store. |
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* Should be deleted by the caller using CTLOG_STORE_free when no longer needed. |
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*/ |
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CTLOG_STORE *CTLOG_STORE_new(void); |
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/* |
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* Deletes a CT log store and all of the CT log instances held within. |
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*/ |
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void CTLOG_STORE_free(CTLOG_STORE *store); |
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|
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/* |
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* Finds a CT log in the store based on its log ID. |
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* Returns the CT log, or NULL if no match is found. |
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*/ |
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const CTLOG *CTLOG_STORE_get0_log_by_id(const CTLOG_STORE *store, |
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const uint8_t *log_id, |
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size_t log_id_len); |
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/* |
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* Loads a CT log list into a |store| from a |file|. |
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* Returns 1 if loading is successful, or 0 otherwise. |
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*/ |
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__owur int CTLOG_STORE_load_file(CTLOG_STORE *store, const char *file); |
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|
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/* |
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* Loads the default CT log list into a |store|. |
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* See internal/cryptlib.h for the environment variable and file path that are |
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* consulted to find the default file. |
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* Returns 1 if loading is successful, or 0 otherwise. |
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*/ |
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__owur int CTLOG_STORE_load_default_file(CTLOG_STORE *store); |
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|
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/* BEGIN ERROR CODES */ |
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/* |
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* The following lines are auto generated by the script mkerr.pl. Any changes |
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* made after this point may be overwritten when the script is next run. |
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*/ |
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|
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int ERR_load_CT_strings(void); |
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|
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/* Error codes for the CT functions. */ |
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|
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/* Function codes. */ |
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# define CT_F_CTLOG_NEW 117 |
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# define CT_F_CTLOG_NEW_FROM_BASE64 118 |
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# define CT_F_CTLOG_NEW_FROM_CONF 119 |
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# define CT_F_CTLOG_NEW_NULL 120 |
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# define CT_F_CTLOG_STORE_LOAD_CTX_NEW 122 |
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# define CT_F_CTLOG_STORE_LOAD_FILE 123 |
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# define CT_F_CTLOG_STORE_LOAD_LOG 130 |
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# define CT_F_CTLOG_STORE_NEW 131 |
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# define CT_F_CT_BASE64_DECODE 124 |
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# define CT_F_CT_POLICY_EVAL_CTX_NEW 133 |
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# define CT_F_CT_V1_LOG_ID_FROM_PKEY 125 |
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# define CT_F_I2O_SCT 107 |
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# define CT_F_I2O_SCT_LIST 108 |
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# define CT_F_I2O_SCT_SIGNATURE 109 |
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# define CT_F_O2I_SCT 110 |
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# define CT_F_O2I_SCT_LIST 111 |
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# define CT_F_O2I_SCT_SIGNATURE 112 |
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# define CT_F_SCT_CTX_NEW 126 |
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# define CT_F_SCT_NEW 100 |
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# define CT_F_SCT_NEW_FROM_BASE64 127 |
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# define CT_F_SCT_SET0_LOG_ID 101 |
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# define CT_F_SCT_SET1_EXTENSIONS 114 |
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# define CT_F_SCT_SET1_LOG_ID 115 |
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# define CT_F_SCT_SET1_SIGNATURE 116 |
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# define CT_F_SCT_SET_LOG_ENTRY_TYPE 102 |
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# define CT_F_SCT_SET_SIGNATURE_NID 103 |
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# define CT_F_SCT_SET_VERSION 104 |
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# define CT_F_SCT_CTX_VERIFY 128 |
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|
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/* Reason codes. */ |
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# define CT_R_BASE64_DECODE_ERROR 108 |
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# define CT_R_INVALID_LOG_ID_LENGTH 100 |
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# define CT_R_LOG_CONF_INVALID 109 |
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# define CT_R_LOG_CONF_INVALID_KEY 110 |
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# define CT_R_LOG_CONF_MISSING_DESCRIPTION 111 |
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# define CT_R_LOG_CONF_MISSING_KEY 112 |
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# define CT_R_LOG_KEY_INVALID 113 |
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# define CT_R_SCT_INVALID 104 |
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# define CT_R_SCT_INVALID_SIGNATURE 107 |
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# define CT_R_SCT_LIST_INVALID 105 |
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# define CT_R_SCT_LOG_ID_MISMATCH 114 |
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# define CT_R_SCT_NOT_SET 106 |
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# define CT_R_SCT_UNSUPPORTED_VERSION 115 |
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# define CT_R_UNRECOGNIZED_SIGNATURE_NID 101 |
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# define CT_R_UNSUPPORTED_ENTRY_TYPE 102 |
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# define CT_R_UNSUPPORTED_VERSION 103 |
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# ifdef __cplusplus |
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} |
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# endif |
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# endif |
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#endif
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