116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
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/****************************************************************
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* *
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* Copyright 2009, 2010 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#ifndef GTMCRYPT_PK_REF_H
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#define GTMCRYPT_PK_REF_H
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int gc_pk_mask_unmask_passwd(char *in, char *out, int len);
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int gc_pk_mask_unmask_passwd_interlude(int nparm, gtm_string_t *in, gtm_string_t *out, int len);
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void gc_pk_scrub_passwd();
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void gc_pk_crypt_load_gtmci_env();
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xc_status_t gc_pk_crypt_prompt_passwd_if_needed(int prompt_passwd);
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int gc_pk_crypt_passphrase_callback(void *opaque,
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const char *uid_hint,
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const char *passphrase_info,
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int last_was_bad,
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int fd);
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int gc_pk_crypt_retrieve_plain_text(gpgme_data_t plain_data, char *plain_text);
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gpgme_error_t gc_pk_get_decrypted_key(const char *cipher_file, char *plain_text, int *plain_text_length);
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int gc_pk_mask_unmask_passwd(char *in, char *out, int len);
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void gc_pk_scrub_passwd(void);
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void gc_pk_crypt_load_gtmci_env(void);
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int gc_pk_scrub_plaintext_keys_from_c_stack(void);
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int gc_pk_gpghome_has_permissions(void);
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/* Public key cryptography related macros */
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#define GC_PK_INIT \
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{ \
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gpgme_error_t err; \
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\
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gpgme_check_version(NULL); /* This initializes the gpgme engine. */ \
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err = gpgme_new(&pk_crypt_ctx); \
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if (!err) \
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{ \
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err = gpgme_set_protocol(pk_crypt_ctx, GPGME_PROTOCOL_OpenPGP); \
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if (!err) \
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{ \
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gpgme_set_passphrase_cb(pk_crypt_ctx, \
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(gpgme_passphrase_cb_t) gc_pk_crypt_passphrase_callback, \
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NULL); \
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memset(err_string, 0, ERR_STRLEN); \
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} \
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} \
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if (err) \
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{ \
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pk_crypt_ctx = NULL; \
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snprintf(err_string, \
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ERR_STRLEN, \
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"Error initializing GpgME: %s/%s", \
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gpgme_strsource(err), \
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gpgme_strerror(err)); \
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return GC_FAILURE; \
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} \
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}
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#define GC_PK_PROMPT_PASSWD(prompt_passwd) \
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{ \
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if (0 != gc_pk_crypt_prompt_passwd_if_needed(prompt_passwd)) \
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return GC_FAILURE; \
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}
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#define GC_PK_GET_DECRYPTED_KEY(key_string, status) \
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{ \
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int plain_text_length; \
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char decrypted_key[GTM_KEY_MAX]; \
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\
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memset(decrypted_key, 0, GTM_KEY_MAX); \
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status = gc_pk_get_decrypted_key(cur->key_filename.address, decrypted_key, &plain_text_length); \
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\
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if (0 == status) \
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{ \
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memcpy(key_string.address, decrypted_key, plain_text_length); \
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key_string.length = plain_text_length; \
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memset(decrypted_key, 0, GTM_KEY_MAX); \
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} \
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}
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#define GC_PK_APPEND_UNIQ_STRING(in_buff, key_string) \
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{ \
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memcpy(in_buff, (key_string).address, (key_string).length); \
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memcpy(in_buff + (key_string).length, UNIQ_ENC_PARAM_STRING, UNIQ_ENC_PARAM_LEN); \
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}
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#ifdef USE_OPENSSL
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#define GC_PK_COMPUTE_HASH(hash, key_string) \
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{ \
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char in_buff[HASH_INPUT_BUFF_LEN]; \
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\
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GC_PK_APPEND_UNIQ_STRING(in_buff, key_string); \
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EVP_Digest(in_buff, HASH_INPUT_BUFF_LEN, (unsigned char *)((hash).address), NULL, \
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EVP_sha512(), NULL); \
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(hash).length = GTMCRYPT_HASH_LEN; \
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memset(in_buff, 0, HASH_INPUT_BUFF_LEN); \
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}
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#else
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#define GC_PK_COMPUTE_HASH(hash, key_string) \
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{ \
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char in_buff[HASH_INPUT_BUFF_LEN]; \
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\
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GC_PK_APPEND_UNIQ_STRING(in_buff, key_string); \
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GC_SYM_INIT; \
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gcry_md_hash_buffer(GCRY_MD_SHA512, (hash).address, in_buff, HASH_INPUT_BUFF_LEN); \
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(hash).length = GTMCRYPT_HASH_LEN; \
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memset(in_buff, 0, HASH_INPUT_BUFF_LEN); \
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}
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#endif
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#endif /* GTMCRYPT_PK_REF_H */
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