From 981bc118f8bdf1df6c23c096a52c890a87ee3e5e Mon Sep 17 00:00:00 2001 From: Timo Teras Date: Tue, 14 Jul 2009 19:14:05 +0300 Subject: db: live with sha1 and md5 this also convers scripts file to a tar archive. --- src/apk_blob.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) (limited to 'src/apk_blob.h') diff --git a/src/apk_blob.h b/src/apk_blob.h index 9ad79c4..170cf20 100644 --- a/src/apk_blob.h +++ b/src/apk_blob.h @@ -13,6 +13,8 @@ #define APK_BLOB_H #include +#include + #include "apk_defines.h" struct apk_blob { @@ -22,10 +24,38 @@ struct apk_blob { typedef struct apk_blob apk_blob_t; typedef int (*apk_blob_cb)(void *ctx, apk_blob_t blob); +#define APK_CHECKSUM_NONE 0 +#define APK_CHECKSUM_MD5 16 +#define APK_CHECKSUM_SHA1 20 + +/* Internal cointainer for MD5 or SHA1 */ +struct apk_checksum { + unsigned char data[20]; + unsigned char type; +}; + +static inline const EVP_MD *apk_default_checksum(void) +{ + return EVP_sha1(); +} + +static inline const EVP_MD *apk_get_digest(int type) +{ + switch (type) { + case APK_CHECKSUM_MD5: + return EVP_md5(); + case APK_CHECKSUM_SHA1: + return EVP_sha1(); + } + return EVP_md_null(); +} + #define APK_BLOB_IS_NULL(blob) ((blob).ptr == NULL) #define APK_BLOB_NULL ((apk_blob_t){0, NULL}) #define APK_BLOB_BUF(buf) ((apk_blob_t){sizeof(buf), (char *)(buf)}) +#define APK_BLOB_CSUM(csum) ((apk_blob_t){(csum).type, (char *)(csum).data}) +#define APK_BLOB_STRUCT(s) ((apk_blob_t){sizeof(s), (char*)&(s)}) #define APK_BLOB_PTR_LEN(beg,len) ((apk_blob_t){(len), (beg)}) #define APK_BLOB_PTR_PTR(beg,end) APK_BLOB_PTR_LEN((beg),(end)-(beg)+1) @@ -47,12 +77,26 @@ int apk_blob_compare(apk_blob_t a, apk_blob_t b); int apk_blob_for_each_segment(apk_blob_t blob, const char *split, apk_blob_cb cb, void *ctx); +static inline void apk_blob_checksum(apk_blob_t b, const EVP_MD *md, struct apk_checksum *csum) +{ + csum->type = EVP_MD_size(md); + EVP_Digest(b.ptr, b.len, csum->data, NULL, md, NULL); +} +static inline const int apk_checksum_compare(const struct apk_checksum *a, + const struct apk_checksum *b) +{ + return apk_blob_compare(APK_BLOB_PTR_LEN((char *) a->data, a->type), + APK_BLOB_PTR_LEN((char *) b->data, b->type)); +} + void apk_blob_push_blob(apk_blob_t *to, apk_blob_t literal); void apk_blob_push_uint(apk_blob_t *to, unsigned int value, int radix); +void apk_blob_push_csum(apk_blob_t *to, struct apk_checksum *csum); void apk_blob_push_hexdump(apk_blob_t *to, apk_blob_t binary); void apk_blob_pull_char(apk_blob_t *b, int expected); unsigned int apk_blob_pull_uint(apk_blob_t *b, int radix); +void apk_blob_pull_csum(apk_blob_t *b, struct apk_checksum *csum); void apk_blob_pull_hexdump(apk_blob_t *b, apk_blob_t to); #endif -- cgit v1.2.3