diff options
Diffstat (limited to 'src/libstrongswan/crypto/prf_plus.c')
-rw-r--r-- | src/libstrongswan/crypto/prf_plus.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/src/libstrongswan/crypto/prf_plus.c b/src/libstrongswan/crypto/prf_plus.c index a4fc377ef..6bd0f7465 100644 --- a/src/libstrongswan/crypto/prf_plus.c +++ b/src/libstrongswan/crypto/prf_plus.c @@ -22,34 +22,34 @@ typedef struct private_prf_plus_t private_prf_plus_t; /** * Private data of an prf_plus_t object. - * + * */ struct private_prf_plus_t { /** * Public interface of prf_plus_t. */ prf_plus_t public; - + /** * PRF to use. */ prf_t *prf; - + /** * Initial seed. */ chunk_t seed; - + /** * Buffer to store current PRF result. */ chunk_t buffer; - + /** * Already given out bytes in current buffer. */ size_t given_out; - + /** * Octet which will be appended to the seed. */ @@ -60,18 +60,18 @@ struct private_prf_plus_t { * Implementation of prf_plus_t.get_bytes. */ static void get_bytes(private_prf_plus_t *this, size_t length, u_int8_t *buffer) -{ +{ chunk_t appending_chunk; size_t bytes_in_round; size_t total_bytes_written = 0; - + appending_chunk.ptr = &(this->appending_octet); appending_chunk.len = 1; - + while (length > 0) { /* still more to do... */ if (this->buffer.len == this->given_out) - { /* no bytes left in buffer, get next*/ + { /* no bytes left in buffer, get next*/ this->prf->get_bytes(this->prf, this->buffer, NULL); this->prf->get_bytes(this->prf, this->seed, NULL); this->prf->get_bytes(this->prf, appending_chunk, this->buffer.ptr); @@ -82,7 +82,7 @@ static void get_bytes(private_prf_plus_t *this, size_t length, u_int8_t *buffer) bytes_in_round = min(length, this->buffer.len - this->given_out); /* copy bytes from buffer with offset */ memcpy(buffer + total_bytes_written, this->buffer.ptr + this->given_out, bytes_in_round); - + length -= bytes_in_round; this->given_out += bytes_in_round; total_bytes_written += bytes_in_round; @@ -91,7 +91,7 @@ static void get_bytes(private_prf_plus_t *this, size_t length, u_int8_t *buffer) /** * Implementation of prf_plus_t.allocate_bytes. - */ + */ static void allocate_bytes(private_prf_plus_t *this, size_t length, chunk_t *chunk) { if (length) @@ -123,23 +123,23 @@ prf_plus_t *prf_plus_create(prf_t *prf, chunk_t seed) { private_prf_plus_t *this; chunk_t appending_chunk; - + this = malloc_thing(private_prf_plus_t); /* set public methods */ this->public.get_bytes = (void (*)(prf_plus_t *,size_t,u_int8_t*))get_bytes; this->public.allocate_bytes = (void (*)(prf_plus_t *,size_t,chunk_t*))allocate_bytes; this->public.destroy = (void (*)(prf_plus_t *))destroy; - + /* take over prf */ this->prf = prf; - + /* allocate buffer for prf output */ this->buffer.len = prf->get_block_size(prf); this->buffer.ptr = malloc(this->buffer.len); this->appending_octet = 0x01; - + /* clone seed */ this->seed.ptr = clalloc(seed.ptr, seed.len); this->seed.len = seed.len; @@ -151,6 +151,6 @@ prf_plus_t *prf_plus_create(prf_t *prf, chunk_t seed) this->prf->get_bytes(this->prf, appending_chunk, this->buffer.ptr); this->given_out = 0; this->appending_octet++; - + return &(this->public); } |