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Diffstat (limited to 'extension/openssl/ct.h.in')
| -rw-r--r-- | extension/openssl/ct.h.in | 525 |
1 files changed, 525 insertions, 0 deletions
diff --git a/extension/openssl/ct.h.in b/extension/openssl/ct.h.in new file mode 100644 index 0000000..16086b3 --- /dev/null +++ b/extension/openssl/ct.h.in @@ -0,0 +1,525 @@ +/* + * {- join("\n * ", @autowarntext) -} + * + * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (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 + */ + +{- +use OpenSSL::stackhash qw(generate_stack_macros); +-} + +#ifndef OPENSSL_CT_H +# define OPENSSL_CT_H +# pragma once + +# include <openssl/macros.h> +# ifndef OPENSSL_NO_DEPRECATED_3_0 +# define HEADER_CT_H +# endif + +# include <openssl/opensslconf.h> + +# ifndef OPENSSL_NO_CT +# include <openssl/types.h> +# include <openssl/safestack.h> +# include <openssl/x509.h> +# include <openssl/cterr.h> +# ifdef __cplusplus +extern "C" { +# endif + + +/* Minimum RSA key size, from RFC6962 */ +# define SCT_MIN_RSA_BITS 2048 + +/* All hashes are SHA256 in v1 of Certificate Transparency */ +# define CT_V1_HASHLEN SHA256_DIGEST_LENGTH + +{- + generate_stack_macros("SCT") + .generate_stack_macros("CTLOG"); +-} + + +typedef enum { + CT_LOG_ENTRY_TYPE_NOT_SET = -1, + CT_LOG_ENTRY_TYPE_X509 = 0, + CT_LOG_ENTRY_TYPE_PRECERT = 1 +} ct_log_entry_type_t; + +typedef enum { + SCT_VERSION_NOT_SET = -1, + SCT_VERSION_V1 = 0 +} sct_version_t; + +typedef enum { + SCT_SOURCE_UNKNOWN, + SCT_SOURCE_TLS_EXTENSION, + SCT_SOURCE_X509V3_EXTENSION, + SCT_SOURCE_OCSP_STAPLED_RESPONSE +} sct_source_t; + +typedef enum { + SCT_VALIDATION_STATUS_NOT_SET, + SCT_VALIDATION_STATUS_UNKNOWN_LOG, + SCT_VALIDATION_STATUS_VALID, + SCT_VALIDATION_STATUS_INVALID, + SCT_VALIDATION_STATUS_UNVERIFIED, + SCT_VALIDATION_STATUS_UNKNOWN_VERSION +} sct_validation_status_t; + +/****************************************** + * CT policy evaluation context functions * + ******************************************/ + +/* + * Creates a new, empty policy evaluation context associated with the given + * library context and property query string. + * The caller is responsible for calling CT_POLICY_EVAL_CTX_free when finished + * with the CT_POLICY_EVAL_CTX. + */ +CT_POLICY_EVAL_CTX *CT_POLICY_EVAL_CTX_new_ex(OSSL_LIB_CTX *libctx, + const char *propq); + +/* + * The same as CT_POLICY_EVAL_CTX_new_ex() but the default library + * context and property query string is used. + */ +CT_POLICY_EVAL_CTX *CT_POLICY_EVAL_CTX_new(void); + +/* Deletes a policy evaluation context and anything it owns. */ +void CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx); + +/* Gets the peer certificate that the SCTs are for */ +X509* CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx); + +/* + * Sets the certificate associated with the received SCTs. + * Increments the reference count of cert. + * Returns 1 on success, 0 otherwise. + */ +int CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert); + +/* Gets the issuer of the aforementioned certificate */ +X509* CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx); + +/* + * Sets the issuer of the certificate associated with the received SCTs. + * Increments the reference count of issuer. + * Returns 1 on success, 0 otherwise. + */ +int CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer); + +/* Gets the CT logs that are trusted sources of SCTs */ +const CTLOG_STORE *CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx); + +/* Sets the log store that is in use. It must outlive the CT_POLICY_EVAL_CTX. */ +void CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx, + CTLOG_STORE *log_store); + +/* + * Gets the time, in milliseconds since the Unix epoch, that will be used as the + * current time when checking whether an SCT was issued in the future. + * Such SCTs will fail validation, as required by RFC6962. + */ +uint64_t CT_POLICY_EVAL_CTX_get_time(const CT_POLICY_EVAL_CTX *ctx); + +/* + * Sets the time to evaluate SCTs against, in milliseconds since the Unix epoch. + * If an SCT's timestamp is after this time, it will be interpreted as having + * been issued in the future. RFC6962 states that "TLS clients MUST reject SCTs + * whose timestamp is in the future", so an SCT will not validate in this case. + */ +void CT_POLICY_EVAL_CTX_set_time(CT_POLICY_EVAL_CTX *ctx, uint64_t time_in_ms); + +/***************** + * SCT functions * + *****************/ + +/* + * Creates a new, blank SCT. + * The caller is responsible for calling SCT_free when finished with the SCT. + */ +SCT *SCT_new(void); + +/* + * Creates a new SCT from some base64-encoded strings. + * The caller is responsible for calling SCT_free when finished with the SCT. + */ +SCT *SCT_new_from_base64(unsigned char version, + const char *logid_base64, + ct_log_entry_type_t entry_type, + uint64_t timestamp, + const char *extensions_base64, + const char *signature_base64); + +/* + * Frees the SCT and the underlying data structures. + */ +void SCT_free(SCT *sct); + +/* + * Free a stack of SCTs, and the underlying SCTs themselves. + * Intended to be compatible with X509V3_EXT_FREE. + */ +void SCT_LIST_free(STACK_OF(SCT) *a); + +/* + * Returns the version of the SCT. + */ +sct_version_t SCT_get_version(const SCT *sct); + +/* + * Set the version of an SCT. + * Returns 1 on success, 0 if the version is unrecognized. + */ +__owur int SCT_set_version(SCT *sct, sct_version_t version); + +/* + * Returns the log entry type of the SCT. + */ +ct_log_entry_type_t SCT_get_log_entry_type(const SCT *sct); + +/* + * Set the log entry type of an SCT. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set_log_entry_type(SCT *sct, ct_log_entry_type_t entry_type); + +/* + * Gets the ID of the log that an SCT came from. + * Ownership of the log ID remains with the SCT. + * Returns the length of the log ID. + */ +size_t SCT_get0_log_id(const SCT *sct, unsigned char **log_id); + +/* + * Set the log ID of an SCT to point directly to the *log_id specified. + * The SCT takes ownership of the specified pointer. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set0_log_id(SCT *sct, unsigned char *log_id, size_t log_id_len); + +/* + * Set the log ID of an SCT. + * This makes a copy of the log_id. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set1_log_id(SCT *sct, const unsigned char *log_id, + size_t log_id_len); + +/* + * Returns the timestamp for the SCT (epoch time in milliseconds). + */ +uint64_t SCT_get_timestamp(const SCT *sct); + +/* + * Set the timestamp of an SCT (epoch time in milliseconds). + */ +void SCT_set_timestamp(SCT *sct, uint64_t timestamp); + +/* + * Return the NID for the signature used by the SCT. + * For CT v1, this will be either NID_sha256WithRSAEncryption or + * NID_ecdsa_with_SHA256 (or NID_undef if incorrect/unset). + */ +int SCT_get_signature_nid(const SCT *sct); + +/* + * Set the signature type of an SCT + * For CT v1, this should be either NID_sha256WithRSAEncryption or + * NID_ecdsa_with_SHA256. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set_signature_nid(SCT *sct, int nid); + +/* + * Set *ext to point to the extension data for the SCT. ext must not be NULL. + * The SCT retains ownership of this pointer. + * Returns length of the data pointed to. + */ +size_t SCT_get0_extensions(const SCT *sct, unsigned char **ext); + +/* + * Set the extensions of an SCT to point directly to the *ext specified. + * The SCT takes ownership of the specified pointer. + */ +void SCT_set0_extensions(SCT *sct, unsigned char *ext, size_t ext_len); + +/* + * Set the extensions of an SCT. + * This takes a copy of the ext. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set1_extensions(SCT *sct, const unsigned char *ext, + size_t ext_len); + +/* + * Set *sig to point to the signature for the SCT. sig must not be NULL. + * The SCT retains ownership of this pointer. + * Returns length of the data pointed to. + */ +size_t SCT_get0_signature(const SCT *sct, unsigned char **sig); + +/* + * Set the signature of an SCT to point directly to the *sig specified. + * The SCT takes ownership of the specified pointer. + */ +void SCT_set0_signature(SCT *sct, unsigned char *sig, size_t sig_len); + +/* + * Set the signature of an SCT to be a copy of the *sig specified. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set1_signature(SCT *sct, const unsigned char *sig, + size_t sig_len); + +/* + * The origin of this SCT, e.g. TLS extension, OCSP response, etc. + */ +sct_source_t SCT_get_source(const SCT *sct); + +/* + * Set the origin of this SCT, e.g. TLS extension, OCSP response, etc. + * Returns 1 on success, 0 otherwise. + */ +__owur int SCT_set_source(SCT *sct, sct_source_t source); + +/* + * Returns a text string describing the validation status of |sct|. + */ +const char *SCT_validation_status_string(const SCT *sct); + +/* + * Pretty-prints an |sct| to |out|. + * It will be indented by the number of spaces specified by |indent|. + * If |logs| is not NULL, it will be used to lookup the CT log that the SCT came + * from, so that the log name can be printed. + */ +void SCT_print(const SCT *sct, BIO *out, int indent, const CTLOG_STORE *logs); + +/* + * Pretty-prints an |sct_list| to |out|. + * It will be indented by the number of spaces specified by |indent|. + * SCTs will be delimited by |separator|. + * If |logs| is not NULL, it will be used to lookup the CT log that each SCT + * came from, so that the log names can be printed. + */ +void SCT_LIST_print(const STACK_OF(SCT) *sct_list, BIO *out, int indent, + const char *separator, const CTLOG_STORE *logs); + +/* + * Gets the last result of validating this SCT. + * If it has not been validated yet, returns SCT_VALIDATION_STATUS_NOT_SET. + */ +sct_validation_status_t SCT_get_validation_status(const SCT *sct); + +/* + * Validates the given SCT with the provided context. + * Sets the "validation_status" field of the SCT. + * Returns 1 if the SCT is valid and the signature verifies. + * Returns 0 if the SCT is invalid or could not be verified. + * Returns -1 if an error occurs. + */ +__owur int SCT_validate(SCT *sct, const CT_POLICY_EVAL_CTX *ctx); + +/* + * Validates the given list of SCTs with the provided context. + * Sets the "validation_status" field of each SCT. + * Returns 1 if there are no invalid SCTs and all signatures verify. + * Returns 0 if at least one SCT is invalid or could not be verified. + * Returns a negative integer if an error occurs. + */ +__owur int SCT_LIST_validate(const STACK_OF(SCT) *scts, + CT_POLICY_EVAL_CTX *ctx); + + +/********************************* + * SCT parsing and serialization * + *********************************/ + +/* + * Serialize (to TLS format) a stack of SCTs and return the length. + * "a" must not be NULL. + * If "pp" is NULL, just return the length of what would have been serialized. + * If "pp" is not NULL and "*pp" is null, function will allocate a new pointer + * for data that caller is responsible for freeing (only if function returns + * successfully). + * If "pp" is NULL and "*pp" is not NULL, caller is responsible for ensuring + * that "*pp" is large enough to accept all of the serialized data. + * Returns < 0 on error, >= 0 indicating bytes written (or would have been) + * on success. + */ +__owur int i2o_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp); + +/* + * Convert TLS format SCT list to a stack of SCTs. + * If "a" or "*a" is NULL, a new stack will be created that the caller is + * responsible for freeing (by calling SCT_LIST_free). + * "**pp" and "*pp" must not be NULL. + * Upon success, "*pp" will point to after the last bytes read, and a stack + * will be returned. + * Upon failure, a NULL pointer will be returned, and the position of "*pp" is + * not defined. + */ +STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, + size_t len); + +/* + * Serialize (to DER format) a stack of SCTs and return the length. + * "a" must not be NULL. + * If "pp" is NULL, just returns the length of what would have been serialized. + * If "pp" is not NULL and "*pp" is null, function will allocate a new pointer + * for data that caller is responsible for freeing (only if function returns + * successfully). + * If "pp" is NULL and "*pp" is not NULL, caller is responsible for ensuring + * that "*pp" is large enough to accept all of the serialized data. + * Returns < 0 on error, >= 0 indicating bytes written (or would have been) + * on success. + */ +__owur int i2d_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp); + +/* + * Parses an SCT list in DER format and returns it. + * If "a" or "*a" is NULL, a new stack will be created that the caller is + * responsible for freeing (by calling SCT_LIST_free). + * "**pp" and "*pp" must not be NULL. + * Upon success, "*pp" will point to after the last bytes read, and a stack + * will be returned. + * Upon failure, a NULL pointer will be returned, and the position of "*pp" is + * not defined. + */ +STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, + long len); + +/* + * Serialize (to TLS format) an |sct| and write it to |out|. + * If |out| is null, no SCT will be output but the length will still be returned. + * If |out| points to a null pointer, a string will be allocated to hold the + * TLS-format SCT. It is the responsibility of the caller to free it. + * If |out| points to an allocated string, the TLS-format SCT will be written + * to it. + * The length of the SCT in TLS format will be returned. + */ +__owur int i2o_SCT(const SCT *sct, unsigned char **out); + +/* + * Parses an SCT in TLS format and returns it. + * If |psct| is not null, it will end up pointing to the parsed SCT. If it + * already points to a non-null pointer, the pointer will be free'd. + * |in| should be a pointer to a string containing the TLS-format SCT. + * |in| will be advanced to the end of the SCT if parsing succeeds. + * |len| should be the length of the SCT in |in|. + * Returns NULL if an error occurs. + * If the SCT is an unsupported version, only the SCT's 'sct' and 'sct_len' + * fields will be populated (with |in| and |len| respectively). + */ +SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len); + +/******************** + * CT log functions * + ********************/ + +/* + * Creates a new CT log instance with the given |public_key| and |name| and + * associates it with the give library context |libctx| and property query + * string |propq|. + * Takes ownership of |public_key| but copies |name|. + * Returns NULL if malloc fails or if |public_key| cannot be converted to DER. + * Should be deleted by the caller using CTLOG_free when no longer needed. + */ +CTLOG *CTLOG_new_ex(EVP_PKEY *public_key, const char *name, OSSL_LIB_CTX *libctx, + const char *propq); + +/* + * The same as CTLOG_new_ex except that the default library context and + * property query string are used. + */ +CTLOG *CTLOG_new(EVP_PKEY *public_key, const char *name); + +/* + * Creates a new CTLOG instance with the base64-encoded SubjectPublicKeyInfo DER + * in |pkey_base64| and associated with the given library context |libctx| and + * property query string |propq|. The |name| is a string to help users identify + * this log. + * Returns 1 on success, 0 on failure. + * Should be deleted by the caller using CTLOG_free when no longer needed. + */ +int CTLOG_new_from_base64_ex(CTLOG **ct_log, const char *pkey_base64, + const char *name, OSSL_LIB_CTX *libctx, + const char *propq); + +/* + * The same as CTLOG_new_from_base64_ex() except that the default + * library context and property query string are used. + * Returns 1 on success, 0 on failure. + */ +int CTLOG_new_from_base64(CTLOG ** ct_log, + const char *pkey_base64, const char *name); + +/* + * Deletes a CT log instance and its fields. + */ +void CTLOG_free(CTLOG *log); + +/* Gets the name of the CT log */ +const char *CTLOG_get0_name(const CTLOG *log); +/* Gets the ID of the CT log */ +void CTLOG_get0_log_id(const CTLOG *log, const uint8_t **log_id, + size_t *log_id_len); +/* Gets the public key of the CT log */ +EVP_PKEY *CTLOG_get0_public_key(const CTLOG *log); + +/************************** + * CT log store functions * + **************************/ + +/* + * Creates a new CT log store and associates it with the given libctx and + * property query string. + * Should be deleted by the caller using CTLOG_STORE_free when no longer needed. + */ +CTLOG_STORE *CTLOG_STORE_new_ex(OSSL_LIB_CTX *libctx, const char *propq); + +/* + * Same as CTLOG_STORE_new_ex except that the default libctx and + * property query string are used. + * Should be deleted by the caller using CTLOG_STORE_free when no longer needed. + */ +CTLOG_STORE *CTLOG_STORE_new(void); + +/* + * Deletes a CT log store and all of the CT log instances held within. + */ +void CTLOG_STORE_free(CTLOG_STORE *store); + +/* + * Finds a CT log in the store based on its log ID. + * Returns the CT log, or NULL if no match is found. + */ +const CTLOG *CTLOG_STORE_get0_log_by_id(const CTLOG_STORE *store, + const uint8_t *log_id, + size_t log_id_len); + +/* + * Loads a CT log list into a |store| from a |file|. + * Returns 1 if loading is successful, or 0 otherwise. + */ +__owur int CTLOG_STORE_load_file(CTLOG_STORE *store, const char *file); + +/* + * Loads the default CT log list into a |store|. + * Returns 1 if loading is successful, or 0 otherwise. + */ +__owur int CTLOG_STORE_load_default_file(CTLOG_STORE *store); + +# ifdef __cplusplus +} +# endif +# endif +#endif |