diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/aes.c | 72 | ||||
| -rw-r--r-- | src/box.c | 4 | ||||
| -rw-r--r-- | src/buffer.c | 14 | ||||
| -rw-r--r-- | src/error.c | 86 |
4 files changed, 109 insertions, 67 deletions
@@ -21,9 +21,9 @@ AesNI_StatusCode aesni_aes_format_block( assert(block); if (str == NULL) - return aesni_make_null_argument_error(err_details, "str"); + return aesni_error_null_argument(err_details, "str"); if (block == NULL) - return aesni_make_null_argument_error(err_details, "block"); + return aesni_error_null_argument(err_details, "block"); char* cursor = str->str; @@ -46,9 +46,9 @@ AesNI_StatusCode aesni_aes_format_block_as_matrix( assert(block); if (str == NULL) - return aesni_make_null_argument_error(err_details, "str"); + return aesni_error_null_argument(err_details, "str"); if (block == NULL) - return aesni_make_null_argument_error(err_details, "block"); + return aesni_error_null_argument(err_details, "block"); char* cursor = str->str; @@ -73,7 +73,7 @@ AesNI_StatusCode aesni_aes_print_block( assert(block); if (block == NULL) - return aesni_make_null_argument_error(err_details, "block"); + return aesni_error_null_argument(err_details, "block"); AesNI_StatusCode ec = AESNI_SUCCESS; AesNI_Aes_BlockString str; @@ -92,7 +92,7 @@ AesNI_StatusCode aesni_aes_print_block_as_matrix( assert(block); if (block == NULL) - return aesni_make_null_argument_error(err_details, "block"); + return aesni_error_null_argument(err_details, "block"); AesNI_StatusCode ec = AESNI_SUCCESS; AesNI_Aes_BlockMatrixString str; @@ -113,9 +113,11 @@ AesNI_StatusCode aesni_aes_parse_block( assert(src); if (dest == NULL) - return aesni_make_null_argument_error(err_details, "dest"); + return aesni_error_null_argument(err_details, "dest"); if (src == NULL) - return aesni_make_null_argument_error(err_details, "src"); + return aesni_error_null_argument(err_details, "src"); + + const char* cursor = src; __declspec(align(16)) unsigned char bytes[16]; @@ -123,10 +125,10 @@ AesNI_StatusCode aesni_aes_parse_block( { int n; unsigned int byte; - if (sscanf(src, "%2x%n", &byte, &n) != 1) - return aesni_make_parse_error(err_details, src); + if (sscanf(cursor, "%2x%n", &byte, &n) != 1) + return aesni_error_parse(err_details, src, "a 128-bit block"); bytes[i] = (unsigned char) byte; - src += n; + cursor += n; } *dest = aesni_load_block128_aligned(bytes); @@ -150,9 +152,9 @@ AesNI_StatusCode aesni_aes192_format_key( assert(key); if (str == NULL) - return aesni_make_null_argument_error(err_details, "str"); + return aesni_error_null_argument(err_details, "str"); if (key == NULL) - return aesni_make_null_argument_error(err_details, "key"); + return aesni_error_null_argument(err_details, "key"); char* cursor = str->str; @@ -185,9 +187,9 @@ AesNI_StatusCode aesni_aes256_format_key( assert(key); if (str == NULL) - return aesni_make_null_argument_error(err_details, "str"); + return aesni_error_null_argument(err_details, "str"); if (key == NULL) - return aesni_make_null_argument_error(err_details, "key"); + return aesni_error_null_argument(err_details, "key"); char* cursor = str->str; @@ -225,7 +227,7 @@ AesNI_StatusCode aesni_aes192_print_key( assert(key); if (key == NULL) - return aesni_make_null_argument_error(err_details, "key"); + return aesni_error_null_argument(err_details, "key"); AesNI_StatusCode ec = AESNI_SUCCESS; AesNI_Aes192_KeyString str; @@ -244,7 +246,7 @@ AesNI_StatusCode aesni_aes256_print_key( assert(key); if (key == NULL) - return aesni_make_null_argument_error(err_details, "key"); + return aesni_error_null_argument(err_details, "key"); AesNI_StatusCode ec = AESNI_SUCCESS; AesNI_Aes256_KeyString str; @@ -273,9 +275,11 @@ AesNI_StatusCode aesni_aes192_parse_key( assert(src); if (dest == NULL) - return aesni_make_null_argument_error(err_details, "dest"); + return aesni_error_null_argument(err_details, "dest"); if (src == NULL) - return aesni_make_null_argument_error(err_details, "src"); + return aesni_error_null_argument(err_details, "src"); + + const char* cursor = src; { __declspec(align(16)) unsigned char bytes[16]; @@ -284,10 +288,10 @@ AesNI_StatusCode aesni_aes192_parse_key( { int n; unsigned int byte; - if (sscanf(src, "%2x%n", &byte, &n) != 1) - return aesni_make_parse_error(err_details, src); + if (sscanf(cursor, "%2x%n", &byte, &n) != 1) + return aesni_error_parse(err_details, src, "a 192-bit block"); bytes[i] = (unsigned char) byte; - src += n; + cursor += n; } dest->lo = aesni_load_block128_aligned(bytes); @@ -300,10 +304,10 @@ AesNI_StatusCode aesni_aes192_parse_key( { int n; unsigned int byte; - if (sscanf(src, "%2x%n", &byte, &n) != 1) - return aesni_make_parse_error(err_details, src); + if (sscanf(cursor, "%2x%n", &byte, &n) != 1) + return aesni_error_parse(err_details, src, "a 192-bit block"); bytes[i] = (unsigned char) byte; - src += n; + cursor += n; } memset(bytes + 8, 0x00, 8); @@ -322,9 +326,11 @@ AesNI_StatusCode aesni_aes256_parse_key( assert(src); if (dest == NULL) - return aesni_make_null_argument_error(err_details, "dest"); + return aesni_error_null_argument(err_details, "dest"); if (src == NULL) - return aesni_make_null_argument_error(err_details, "src"); + return aesni_error_null_argument(err_details, "src"); + + const char* cursor = src; { __declspec(align(16)) unsigned char bytes[16]; @@ -333,10 +339,10 @@ AesNI_StatusCode aesni_aes256_parse_key( { int n; unsigned int byte; - if (sscanf(src, "%2x%n", &byte, &n) != 1) - return aesni_make_parse_error(err_details, src); + if (sscanf(cursor, "%2x%n", &byte, &n) != 1) + return aesni_error_parse(err_details, src, "a 256-bit block"); bytes[i] = (unsigned char) byte; - src += n; + cursor += n; } dest->lo = aesni_load_block128_aligned(bytes); @@ -349,10 +355,10 @@ AesNI_StatusCode aesni_aes256_parse_key( { int n; unsigned int byte; - if (sscanf(src, "%2x%n", &byte, &n) != 1) - return aesni_make_parse_error(err_details, src); + if (sscanf(cursor, "%2x%n", &byte, &n) != 1) + return aesni_error_parse(err_details, src, "a 256-bit block"); bytes[i] = (unsigned char) byte; - src += n; + cursor += n; } dest->hi = aesni_load_block128_aligned(bytes); @@ -131,7 +131,7 @@ static AesNI_StatusCode aesni_box_encrypt_ctr( AesNI_BoxBlock* output, AesNI_ErrorDetails* err_details) { - return aesni_error_not_implemented(err_details); + return aesni_error_not_implemented(err_details, "box encryption in CTR mode"); } typedef AesNI_StatusCode (*AesNI_BoxEncryptMode)( @@ -254,7 +254,7 @@ static AesNI_StatusCode aesni_box_decrypt_ctr( AesNI_BoxBlock* output, AesNI_ErrorDetails* err_details) { - return aesni_error_not_implemented(err_details); + return aesni_error_not_implemented(err_details, "box decryption in CTR mode"); } typedef AesNI_BoxEncryptMode AesNI_BoxDecryptMode; diff --git a/src/buffer.c b/src/buffer.c index 80120db..593a5b8 100644 --- a/src/buffer.c +++ b/src/buffer.c @@ -22,7 +22,7 @@ AesNI_StatusCode aesni_encrypt_buffer_ecb128( AesNI_ErrorDetails* err_details) { if (dest_size == NULL) - return aesni_make_null_argument_error(err_details, "dest_size"); + return aesni_error_null_argument(err_details, "dest_size"); const size_t rem_size = src_size % 16; const size_t padding_size = 16 - rem_size; @@ -31,9 +31,9 @@ AesNI_StatusCode aesni_encrypt_buffer_ecb128( if (dest == NULL) return AESNI_SUCCESS; if (src == NULL) - return aesni_make_null_argument_error(err_details, "src"); + return aesni_error_null_argument(err_details, "src"); if (encryption_keys == NULL) - return aesni_make_null_argument_error(err_details, "encryption_keys"); + return aesni_error_null_argument(err_details, "encryption_keys"); const size_t src_len = src_size / 16; @@ -84,16 +84,16 @@ AesNI_StatusCode aesni_decrypt_buffer_ecb128( AesNI_ErrorDetails* err_details) { if (dest_size == NULL) - return aesni_make_null_argument_error(err_details, "dest_size"); + return aesni_error_null_argument(err_details, "dest_size"); *dest_size = src_size; if (dest == NULL) return 0; if (src == NULL) - return aesni_make_null_argument_error(err_details, "src"); + return aesni_error_null_argument(err_details, "src"); if (decryption_keys == NULL) - return aesni_make_null_argument_error(err_details, "decryption_keys"); + return aesni_error_null_argument(err_details, "decryption_keys"); const size_t src_len = src_size / 16; @@ -112,7 +112,7 @@ AesNI_StatusCode aesni_decrypt_buffer_ecb128( unsigned char padding_size = get_pkcs7_padding_size(padding); if (padding_size == 0) - return aesni_make_invalid_pkcs7_padding_error(err_details); + return aesni_error_invalid_pkcs7_padding(err_details); memcpy(dest, padding, 16 - padding_size); *dest_size -= padding_size; diff --git a/src/error.c b/src/error.c index 830520c..96f0e01 100644 --- a/src/error.c +++ b/src/error.c @@ -13,9 +13,15 @@ #include <stdlib.h> #include <string.h> -static const char* err_msgs[] = +static void aesni_fill_string(char* dest, size_t dest_size, const char* src) { - "OK", + strncpy(dest, src, dest_size); + dest[dest_size - 1] = '\0'; +} + +static const char* aesni_strerror_messages[] = +{ + "Success", "Invalid argument value NULL", "Couldn't parse", "Invalid PKCS7 padding (wrong key?)", @@ -24,7 +30,7 @@ static const char* err_msgs[] = const char* aesni_strerror(AesNI_StatusCode ec) { - return err_msgs[ec]; + return aesni_strerror_messages[ec]; } static size_t aesni_format_error_strerror( @@ -35,11 +41,10 @@ static size_t aesni_format_error_strerror( const AesNI_StatusCode ec = aesni_get_error_code(err_details); const char* const msg = aesni_strerror(ec); - if (dest == NULL && dest_size == 0) + if (dest == NULL) return strlen(msg) + 1; - strncpy(dest, msg, dest_size); - dest[dest_size - 1] = '\0'; + aesni_fill_string(dest, dest_size, msg); return strlen(dest); } @@ -49,7 +54,7 @@ static size_t aesni_format_null_argument_error( size_t dest_size) { static const char* const fmt = "Invalid argument value NULL (argument name: '%s')"; - const char* const param_name = err_details->params.null_arg_error.param_name; + const char* const param_name = err_details->params.null_arg.param_name; if (dest == NULL && dest_size == 0) return _snprintf(NULL, 0, fmt, param_name) + 1; @@ -63,8 +68,24 @@ static size_t aesni_format_parse_error( char* dest, size_t dest_size) { - static const char* const fmt = "Couldn't parse '%s'"; + static const char* const fmt = "Couldn't parse '%s' (possibly not complete input) as %s"; const char* const src = err_details->params.parse_error.src; + const char* const what = err_details->params.parse_error.what; + + if (dest == NULL) + return _snprintf(NULL, 0, fmt, src, what) + 1; + + _snprintf(dest, dest_size, fmt, src, what); + return strlen(dest); +} + +static size_t aesni_format_not_implemented_error( + const AesNI_ErrorDetails* err_details, + char* dest, + size_t dest_size) +{ + static const char* const fmt = "Not implemented: %s"; + const char* const src = err_details->params.not_implemented.what; if (dest == NULL) return _snprintf(NULL, 0, fmt, src) + 1; @@ -79,9 +100,9 @@ static AesNI_ErrorFormatter err_formatters[] = { &aesni_format_error_strerror, &aesni_format_null_argument_error, + &aesni_format_parse_error, &aesni_format_error_strerror, - &aesni_format_error_strerror, - &aesni_format_error_strerror, + &aesni_format_not_implemented_error, }; size_t aesni_format_error( @@ -104,47 +125,62 @@ static AesNI_StatusCode aesni_make_error( return err_details->ec = ec; } -AesNI_StatusCode aesni_initialize_error_details( +AesNI_StatusCode aesni_success( AesNI_ErrorDetails* err_details) { return aesni_make_error(err_details, AESNI_SUCCESS); } -AesNI_StatusCode aesni_make_null_argument_error( +AesNI_StatusCode aesni_error_null_argument( AesNI_ErrorDetails* err_details, const char* param_name) { - AesNI_StatusCode status = aesni_make_error( - err_details, AESNI_NULL_ARGUMENT_ERROR); + AesNI_StatusCode status = aesni_make_error(err_details, AESNI_NULL_ARGUMENT_ERROR); - const size_t param_name_size = sizeof(err_details->params.null_arg_error.param_name); - strncpy(err_details->params.null_arg_error.param_name, param_name, param_name_size); - err_details->params.null_arg_error.param_name[param_name_size - 1] = '\0'; + if (err_details != NULL) + aesni_fill_string( + err_details->params.null_arg.param_name, + sizeof(err_details->params.null_arg.param_name), param_name); return status; } -AesNI_StatusCode aesni_make_parse_error( +AesNI_StatusCode aesni_error_parse( AesNI_ErrorDetails* err_details, - const char* src) + const char* src, + const char* what) { AesNI_StatusCode status = aesni_make_error(err_details, AESNI_PARSE_ERROR); - const size_t src_size = sizeof(err_details->params.parse_error.src); - strncpy(err_details->params.parse_error.src, src, src_size); - err_details->params.parse_error.src[src_size - 1] = '\0'; + if (err_details != NULL) + { + aesni_fill_string( + err_details->params.parse_error.src, + sizeof(err_details->params.parse_error.src), src); + aesni_fill_string( + err_details->params.parse_error.what, + sizeof(err_details->params.parse_error.what), what); + } return status; } -AesNI_StatusCode aesni_make_invalid_pkcs7_padding_error( +AesNI_StatusCode aesni_error_invalid_pkcs7_padding( AesNI_ErrorDetails* err_details) { return aesni_make_error(err_details, AESNI_INVALID_PKCS7_PADDING_ERROR); } AesNI_StatusCode aesni_error_not_implemented( - AesNI_ErrorDetails* err_details) + AesNI_ErrorDetails* err_details, + const char* what) { - return aesni_make_error(err_details, AESNI_NOT_IMPLEMENTED); + AesNI_StatusCode status = aesni_make_error(err_details, AESNI_NOT_IMPLEMENTED_ERROR); + + if (err_details != NULL) + aesni_fill_string( + err_details->params.not_implemented.what, + sizeof(err_details->params.not_implemented.what), what); + + return status; } |