commit 61f318b1b0bb1cb55d4f54eab87518a1b093ba08 Author: George Kadianakis desnacked@riseup.net Date: Fri Feb 24 12:44:34 2017 +0200

prop224: Rename padding size def to something less confusing.

People felt it could refer to the descriptor header section instead of the plaintext of the superencrypted section. --- src/or/hs_descriptor.c | 13 ++++++------- src/test/test_hs_descriptor.c | 10 +++++----- 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/src/or/hs_descriptor.c b/src/or/hs_descriptor.c index d15c160..f441fbf 100644 --- a/src/or/hs_descriptor.c +++ b/src/or/hs_descriptor.c @@ -558,18 +558,17 @@ static size_t compute_padded_plaintext_length(size_t plaintext_len) { size_t plaintext_padded_len; + const int padding_block_length = HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE;

/* Make sure we won't overflow. */ - tor_assert(plaintext_len <= - (SIZE_T_CEILING - HS_DESC_PLAINTEXT_PADDING_MULTIPLE)); + tor_assert(plaintext_len <= (SIZE_T_CEILING - padding_block_length));

/* Get the extra length we need to add. For example, if srclen is 10200 * bytes, this will expand to (2 * 10k) == 20k thus an extra 9800 bytes. */ - plaintext_padded_len = CEIL_DIV(plaintext_len, - HS_DESC_PLAINTEXT_PADDING_MULTIPLE) * - HS_DESC_PLAINTEXT_PADDING_MULTIPLE; + plaintext_padded_len = CEIL_DIV(plaintext_len, padding_block_length) * + padding_block_length; /* Can never be extra careful. Make sure we are _really_ padded. */ - tor_assert(!(plaintext_padded_len % HS_DESC_PLAINTEXT_PADDING_MULTIPLE)); + tor_assert(!(plaintext_padded_len % padding_block_length)); return plaintext_padded_len; }

@@ -619,7 +618,7 @@ build_encrypted(const uint8_t *key, const uint8_t *iv, const char *plaintext, encrypted_len = build_plaintext_padding(plaintext, plaintext_len, &padded_plaintext); /* Extra precautions that we have a valid padding length. */ - tor_assert(!(encrypted_len % HS_DESC_PLAINTEXT_PADDING_MULTIPLE)); + tor_assert(!(encrypted_len % HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE)); } else { /* No padding required for inner layers */ padded_plaintext = tor_memdup(plaintext, plaintext_len); encrypted_len = plaintext_len; diff --git a/src/test/test_hs_descriptor.c b/src/test/test_hs_descriptor.c index 2a2188c..1a1b511 100644 --- a/src/test/test_hs_descriptor.c +++ b/src/test/test_hs_descriptor.c @@ -317,13 +317,13 @@ test_descriptor_padding(void *arg) /* Example: if l = 129, the ceiled division gives 2 and then multiplied by 128 * to give 256. With l = 127, ceiled division gives 1 then times 128. */ #define PADDING_EXPECTED_LEN(l) \ - CEIL_DIV(l, HS_DESC_PLAINTEXT_PADDING_MULTIPLE) * \ - HS_DESC_PLAINTEXT_PADDING_MULTIPLE + CEIL_DIV(l, HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE) * \ + HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE

(void) arg;

{ /* test #1: no padding */ - plaintext_len = HS_DESC_PLAINTEXT_PADDING_MULTIPLE; + plaintext_len = HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE; plaintext = tor_malloc(plaintext_len); padded_len = build_plaintext_padding(plaintext, plaintext_len, &padded_plaintext); @@ -339,7 +339,7 @@ test_descriptor_padding(void *arg) }

{ /* test #2: one byte padding? */ - plaintext_len = HS_DESC_PLAINTEXT_PADDING_MULTIPLE - 1; + plaintext_len = HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE - 1; plaintext = tor_malloc(plaintext_len); padded_plaintext = NULL; padded_len = build_plaintext_padding(plaintext, plaintext_len, @@ -356,7 +356,7 @@ test_descriptor_padding(void *arg) }

{ /* test #3: Lots more bytes of padding? */ - plaintext_len = HS_DESC_PLAINTEXT_PADDING_MULTIPLE + 1; + plaintext_len = HS_DESC_SUPERENC_PLAINTEXT_PAD_MULTIPLE + 1; plaintext = tor_malloc(plaintext_len); padded_plaintext = NULL; padded_len = build_plaintext_padding(plaintext, plaintext_len,