diff options
Diffstat (limited to 'plugins/encodings')
| -rw-r--r-- | plugins/encodings/rost/base64.c | 42 |
1 files changed, 17 insertions, 25 deletions
diff --git a/plugins/encodings/rost/base64.c b/plugins/encodings/rost/base64.c index 15a3ec1..5472ec0 100644 --- a/plugins/encodings/rost/base64.c +++ b/plugins/encodings/rost/base64.c @@ -61,7 +61,7 @@ static void g_scan_base64_modifier_finalize(GScanBase64Modifier *); static char *g_scan_base64_modifier_get_name(const GScanBase64Modifier *); /* Finalise l'encoddage en Base64 d'un motif transformé. */ -static void strip_base64_modifier_output(const sized_binary_t *, size_t, sized_binary_t *); +static void strip_base64_modifier_output(const sized_binary_t *, const sized_binary_t *, size_t, sized_binary_t *); /* Transforme une séquence d'octets pour motif de recherche. */ static bool g_scan_base64_modifier_transform(const GScanBase64Modifier *, const sized_binary_t *, size_t, sized_binary_t **, size_t *); @@ -230,7 +230,8 @@ static char *g_scan_base64_modifier_get_name(const GScanBase64Modifier *modifier /****************************************************************************** * * -* Paramètres : input = encodage en Base64 obtenu. * +* Paramètres : input = contenu brut d'origine. * +* tmpput = encodage en Base64 intermédiaire obtenu. * * skip = nombre de caractères initiaux à sauter. * * output = encodage en Base64 final à conserver. * * * @@ -242,32 +243,23 @@ static char *g_scan_base64_modifier_get_name(const GScanBase64Modifier *modifier * * ******************************************************************************/ -static void strip_base64_modifier_output(const sized_binary_t *input, size_t skip, sized_binary_t *output) +static void strip_base64_modifier_output(const sized_binary_t *input, const sized_binary_t *tmpput, size_t skip, sized_binary_t *output) { - size_t final_len; /* Taille de représentation */ + size_t keep; /* Nombre d'octets immuables */ - final_len = input->len; + keep = (input->len * 8) / 6; - if (final_len > 0 && input->bin_data[final_len - 1] == '=') - { - while (final_len > 0 && input->bin_data[final_len - 1] == '=') - final_len--; - - final_len--; - - } + assert(keep >= skip); if (skip > 0) skip++; - assert(final_len >= skip); - - final_len -= skip; + keep -= skip; - output->len = final_len; - output->bin_data = malloc(final_len * sizeof(bin_t)); + output->len = keep; + output->bin_data = malloc(keep * sizeof(bin_t)); - memcpy(output->bin_data, input->static_bin_data + skip, final_len); + memcpy(output->bin_data, tmpput->static_bin_data + skip, keep); } @@ -320,7 +312,7 @@ static bool g_scan_base64_modifier_transform(const GScanBase64Modifier *modifier result = base64_encode(_src, &tmp_out); if (!result) goto exit; - strip_base64_modifier_output(&tmp_out, 0, binary++); + strip_base64_modifier_output(_src, &tmp_out, 0, binary++); exit_szstr(&tmp_out); @@ -334,7 +326,7 @@ static bool g_scan_base64_modifier_transform(const GScanBase64Modifier *modifier result = base64_encode(&tmp_in, &tmp_out); if (!result) goto exit; - strip_base64_modifier_output(&tmp_out, 1, binary++); + strip_base64_modifier_output(&tmp_in, &tmp_out, 1, binary++); exit_szstr(&tmp_out); @@ -349,7 +341,7 @@ static bool g_scan_base64_modifier_transform(const GScanBase64Modifier *modifier result = base64_encode(&tmp_in, &tmp_out); if (!result) goto exit; - strip_base64_modifier_output(&tmp_out, 2, binary++); + strip_base64_modifier_output(&tmp_in, &tmp_out, 2, binary++); exit_szstr(&tmp_out); @@ -459,7 +451,7 @@ static bool g_scan_base64_modifier_transform_with_arg(const GScanBase64Modifier result = _base64_encode(_src, &tmp_out, &arg->value.string); if (!result) goto exit; - strip_base64_modifier_output(&tmp_out, 0, binary++); + strip_base64_modifier_output(_src, &tmp_out, 0, binary++); exit_szstr(&tmp_out); @@ -473,7 +465,7 @@ static bool g_scan_base64_modifier_transform_with_arg(const GScanBase64Modifier result = _base64_encode(&tmp_in, &tmp_out, &arg->value.string); if (!result) goto exit; - strip_base64_modifier_output(&tmp_out, 1, binary++); + strip_base64_modifier_output(&tmp_in, &tmp_out, 1, binary++); exit_szstr(&tmp_out); @@ -488,7 +480,7 @@ static bool g_scan_base64_modifier_transform_with_arg(const GScanBase64Modifier result = _base64_encode(&tmp_in, &tmp_out, &arg->value.string); if (!result) goto exit; - strip_base64_modifier_output(&tmp_out, 2, binary++); + strip_base64_modifier_output(&tmp_in, &tmp_out, 2, binary++); exit_szstr(&tmp_out); |