Commit 90f78507 authored by Ondřej Zajíček's avatar Ondřej Zajíček

Merge branch 'master' into rip-new

parents 8eb8e546 ad276157
......@@ -70,7 +70,7 @@ struct sym_scope {
static struct sym_scope *conf_this_scope;
static int cf_hash(byte *c);
static struct symbol *cf_find_sym(byte *c, unsigned int h0);
static inline struct symbol * cf_get_sym(byte *c, uint h0);
linpool *cfg_mem;
......@@ -194,7 +194,7 @@ else: {
}
k=k->next;
}
cf_lval.s = cf_find_sym(yytext, h);
cf_lval.s = cf_get_sym(yytext, h);
return SYM;
}
......@@ -426,8 +426,9 @@ check_eof(void)
}
static struct symbol *
cf_new_sym(byte *c, unsigned int h)
cf_new_sym(byte *c, uint h0)
{
uint h = h0 & (SYM_HASH_SIZE-1);
struct symbol *s, **ht;
int l;
......@@ -449,56 +450,77 @@ cf_new_sym(byte *c, unsigned int h)
}
static struct symbol *
cf_find_sym(byte *c, unsigned int h0)
cf_find_sym(struct config *cfg, byte *c, uint h0)
{
unsigned int h = h0 & (SYM_HASH_SIZE-1);
uint h = h0 & (SYM_HASH_SIZE-1);
struct symbol *s, **ht;
if (ht = new_config->sym_hash)
if (ht = cfg->sym_hash)
{
for(s = ht[h]; s; s=s->next)
if (!strcmp(s->name, c) && s->scope->active)
return s;
}
if (new_config->sym_fallback)
if (ht = cfg->sym_fallback)
{
/* We know only top-level scope is active */
for(s = new_config->sym_fallback[h]; s; s=s->next)
for(s = ht[h]; s; s=s->next)
if (!strcmp(s->name, c) && s->scope->active)
return s;
}
return cf_new_sym(c, h);
return NULL;
}
static inline struct symbol *
cf_get_sym(byte *c, uint h0)
{
return cf_find_sym(new_config, c, h0) ?: cf_new_sym(c, h0);
}
/**
* cf_find_symbol - find a symbol by name
* @cfg: specificed config
* @c: symbol name
*
* This functions searches the symbol table in the config @cfg for a symbol of
* given name. First it examines the current scope, then the second recent one
* and so on until it either finds the symbol and returns a pointer to its
* &symbol structure or reaches the end of the scope chain and returns %NULL to
* signify no match.
*/
struct symbol *
cf_find_symbol(struct config *cfg, byte *c)
{
return cf_find_sym(cfg, c, cf_hash(c));
}
/**
* cf_get_symbol - get a symbol by name
* @c: symbol name
*
* This functions searches the symbol table for a symbol of given
* name. First it examines the current scope, then the second recent
* one and so on until it either finds the symbol and returns a pointer
* to its &symbol structure or reaches the end of the scope chain
* and returns %NULL to signify no match.
* This functions searches the symbol table of the currently parsed config
* (@new_config) for a symbol of given name. It returns either the already
* existing symbol or a newly allocated undefined (%SYM_VOID) symbol if no
* existing symbol is found.
*/
struct symbol *
cf_find_symbol(byte *c)
cf_get_symbol(byte *c)
{
return cf_find_sym(c, cf_hash(c));
return cf_get_sym(c, cf_hash(c));
}
struct symbol *
cf_default_name(char *template, int *counter)
{
char buf[32];
char buf[SYM_MAX_LEN];
struct symbol *s;
char *perc = strchr(template, '%');
for(;;)
{
bsprintf(buf, template, ++(*counter));
s = cf_find_sym(buf, cf_hash(buf));
if (!s)
break;
s = cf_get_sym(buf, cf_hash(buf));
if (s->class == SYM_VOID)
return s;
if (!perc)
......@@ -529,7 +551,7 @@ cf_define_symbol(struct symbol *sym, int type, void *def)
{
if (sym->scope == conf_this_scope)
cf_error("Symbol already defined");
sym = cf_new_sym(sym->name, cf_hash(sym->name) & (SYM_HASH_SIZE-1));
sym = cf_new_sym(sym->name, cf_hash(sym->name));
}
sym->class = type;
sym->def = def;
......
......@@ -20,19 +20,19 @@
*
* There can exist up to four different configurations at one time: an active
* one (pointed to by @config), configuration we are just switching from
* (@old_config), one queued for the next reconfiguration (@future_config;
* if there is one and the user wants to reconfigure once again, we just
* free the previous queued config and replace it with the new one) and
* finally a config being parsed (@new_config). The stored @old_config
* is also used for undo reconfiguration, which works in a similar way.
* Reconfiguration could also have timeout (using @config_timer) and undo
* is automatically called if the new configuration is not confirmed later.
* (@old_config), one queued for the next reconfiguration (@future_config; if
* there is one and the user wants to reconfigure once again, we just free the
* previous queued config and replace it with the new one) and finally a config
* being parsed (@new_config). The stored @old_config is also used for undo
* reconfiguration, which works in a similar way. Reconfiguration could also
* have timeout (using @config_timer) and undo is automatically called if the
* new configuration is not confirmed later. The new config (@new_config) and
* associated linear pool (@cfg_mem) is non-NULL only during parsing.
*
* Loading of new configuration is very simple: just call config_alloc()
* to get a new &config structure, then use config_parse() to parse a
* configuration file and fill all fields of the structure
* and finally ask the config manager to switch to the new
* config by calling config_commit().
* Loading of new configuration is very simple: just call config_alloc() to get
* a new &config structure, then use config_parse() to parse a configuration
* file and fill all fields of the structure and finally ask the config manager
* to switch to the new config by calling config_commit().
*
* CLI commands are parsed in a very similar way -- there is also a stripped-down
* &config structure associated with them and they are lex-ed and parsed by the
......@@ -91,10 +91,15 @@ config_alloc(byte *name)
linpool *l = lp_new(p, 4080);
struct config *c = lp_allocz(l, sizeof(struct config));
/* Duplication of name string in local linear pool */
uint nlen = strlen(name) + 1;
char *ndup = lp_allocu(l, nlen);
memcpy(ndup, name, nlen);
c->mrtdump_file = -1; /* Hack, this should be sysdep-specific */
c->pool = p;
cfg_mem = c->mem = l;
c->file_name = cfg_strdup(name);
c->mem = l;
c->file_name = ndup;
c->load_time = now;
c->tf_route = c->tf_proto = (struct timeformat){"%T", "%F", 20*3600};
c->tf_base = c->tf_log = (struct timeformat){"%F %T", NULL, 0};
......@@ -119,11 +124,13 @@ config_alloc(byte *name)
int
config_parse(struct config *c)
{
int done = 0;
DBG("Parsing configuration file `%s'\n", c->file_name);
new_config = c;
cfg_mem = c->mem;
if (setjmp(conf_jmpbuf))
return 0;
goto cleanup;
cf_lex_init(0, c);
sysdep_preconfig(c);
protos_preconfig(c);
......@@ -137,7 +144,12 @@ config_parse(struct config *c)
if (!c->router_id)
cf_error("Router ID must be configured manually on IPv6 routers");
#endif
return 1;
done = 1;
cleanup:
new_config = NULL;
cfg_mem = NULL;
return done;
}
/**
......@@ -150,14 +162,22 @@ config_parse(struct config *c)
int
cli_parse(struct config *c)
{
new_config = c;
int done = 0;
c->sym_fallback = config->sym_hash;
new_config = c;
cfg_mem = c->mem;
if (setjmp(conf_jmpbuf))
return 0;
goto cleanup;
cf_lex_init(1, c);
cf_parse();
return 1;
done = 1;
cleanup:
c->sym_fallback = NULL;
new_config = NULL;
cfg_mem = NULL;
return done;
}
/**
......@@ -237,10 +257,6 @@ config_do_commit(struct config *c, int type)
if (old_config && !config->shutdown)
log(L_INFO "Reconfiguring");
/* This should not be necessary, but it seems there are some
functions that access new_config instead of config */
new_config = config;
if (old_config)
old_config->obstacle_count++;
......@@ -254,9 +270,6 @@ config_do_commit(struct config *c, int type)
DBG("protos_commit\n");
protos_commit(c, old_config, force_restart, type);
/* Just to be sure nobody uses that now */
new_config = NULL;
int obs = 0;
if (old_config)
obs = --old_config->obstacle_count;
......
......@@ -147,7 +147,9 @@ int cf_lex(void);
void cf_lex_init(int is_cli, struct config *c);
void cf_lex_unwind(void);
struct symbol *cf_find_symbol(byte *c);
struct symbol *cf_find_symbol(struct config *cfg, byte *c);
struct symbol *cf_get_symbol(byte *c);
struct symbol *cf_default_name(char *template, int *counter);
struct symbol *cf_define_symbol(struct symbol *symbol, int type, void *def);
void cf_push_scope(struct symbol *);
......
sha256.c
sha256.h
sha512.c
sha512.h
sha1.c
sha1.h
birdlib.h
bitops.c
bitops.h
......
......@@ -30,6 +30,7 @@
#define MAX(a,b) MAX_(a,b)
#endif
#define U64(c) UINT64_C(c)
#define ABS(a) ((a)>=0 ? (a) : -(a))
#define DELTA(a,b) (((a)>=(b))?(a)-(b):(b)-(a))
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
......
......@@ -233,7 +233,7 @@ ip6_ntop(ip6_addr a, char *b)
}
int
ip4_pton(char *a, ip4_addr *o)
ip4_pton(const char *a, ip4_addr *o)
{
int i;
unsigned long int l;
......@@ -258,11 +258,11 @@ ip4_pton(char *a, ip4_addr *o)
}
int
ip6_pton(char *a, ip6_addr *o)
ip6_pton(const char *a, ip6_addr *o)
{
u16 words[8];
int i, j, k, l, hfil;
char *start;
const char *start;
if (a[0] == ':') /* Leading :: */
{
......
......@@ -453,8 +453,8 @@ static inline char * ip4_ntox(ip4_addr a, char *b)
static inline char * ip6_ntox(ip6_addr a, char *b)
{ return b + bsprintf(b, "%08x.%08x.%08x.%08x", _I0(a), _I1(a), _I2(a), _I3(a)); }
int ip4_pton(char *a, ip4_addr *o);
int ip6_pton(char *a, ip6_addr *o);
int ip4_pton(const char *a, ip4_addr *o);
int ip6_pton(const char *a, ip6_addr *o);
// XXXX these functions must be redesigned or removed
#ifdef IPV6
......
......@@ -16,7 +16,7 @@
#endif
int
MATCH_FUNC_NAME(byte *p, byte *s)
MATCH_FUNC_NAME(const byte *p, const byte *s)
{
while (*p)
{
......
/*
* BIRD Library -- SHA-1 Hash Function (FIPS 180-1, RFC 3174) and HMAC-SHA-1
*
* (c) 2015 CZ.NIC z.s.p.o.
*
* Based on the code from libucw-6.4
* (c) 2008--2009 Martin Mares <mj@ucw.cz>
*
* Based on the code from libgcrypt-1.2.3, which is
* (c) 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "lib/sha1.h"
#include "lib/unaligned.h"
void
sha1_init(struct sha1_context *ctx)
{
ctx->h0 = 0x67452301;
ctx->h1 = 0xefcdab89;
ctx->h2 = 0x98badcfe;
ctx->h3 = 0x10325476;
ctx->h4 = 0xc3d2e1f0;
ctx->nblocks = 0;
ctx->count = 0;
}
/*
* Transform the message X which consists of 16 32-bit-words
*/
static void
sha1_transform(struct sha1_context *ctx, const byte *data)
{
u32 a,b,c,d,e,tm;
u32 x[16];
/* Get values from the chaining vars. */
a = ctx->h0;
b = ctx->h1;
c = ctx->h2;
d = ctx->h3;
e = ctx->h4;
#ifdef CPU_BIG_ENDIAN
memcpy(x, data, 64);
#else
int i;
for (i = 0; i < 16; i++)
x[i] = get_u32(data+4*i);
#endif
#define K1 0x5A827999L
#define K2 0x6ED9EBA1L
#define K3 0x8F1BBCDCL
#define K4 0xCA62C1D6L
#define F1(x,y,z) ( z ^ ( x & ( y ^ z ) ) )
#define F2(x,y,z) ( x ^ y ^ z )
#define F3(x,y,z) ( ( x & y ) | ( z & ( x | y ) ) )
#define F4(x,y,z) ( x ^ y ^ z )
#define M(i) (tm = x[i&0x0f] ^ x[(i-14)&0x0f] ^ x[(i-8)&0x0f] ^ x[(i-3)&0x0f], (x[i&0x0f] = ROL(tm, 1)))
/* Bitwise rotation of an unsigned int to the left **/
#define ROL(x, bits) (((x) << (bits)) | ((uint)(x) >> (sizeof(uint)*8 - (bits))))
#define R(a, b, c, d, e, f, k, m) \
do \
{ \
e += ROL(a, 5) + f(b, c, d) + k + m; \
b = ROL(b, 30); \
} while(0)
R( a, b, c, d, e, F1, K1, x[ 0] );
R( e, a, b, c, d, F1, K1, x[ 1] );
R( d, e, a, b, c, F1, K1, x[ 2] );
R( c, d, e, a, b, F1, K1, x[ 3] );
R( b, c, d, e, a, F1, K1, x[ 4] );
R( a, b, c, d, e, F1, K1, x[ 5] );
R( e, a, b, c, d, F1, K1, x[ 6] );
R( d, e, a, b, c, F1, K1, x[ 7] );
R( c, d, e, a, b, F1, K1, x[ 8] );
R( b, c, d, e, a, F1, K1, x[ 9] );
R( a, b, c, d, e, F1, K1, x[10] );
R( e, a, b, c, d, F1, K1, x[11] );
R( d, e, a, b, c, F1, K1, x[12] );
R( c, d, e, a, b, F1, K1, x[13] );
R( b, c, d, e, a, F1, K1, x[14] );
R( a, b, c, d, e, F1, K1, x[15] );
R( e, a, b, c, d, F1, K1, M(16) );
R( d, e, a, b, c, F1, K1, M(17) );
R( c, d, e, a, b, F1, K1, M(18) );
R( b, c, d, e, a, F1, K1, M(19) );
R( a, b, c, d, e, F2, K2, M(20) );
R( e, a, b, c, d, F2, K2, M(21) );
R( d, e, a, b, c, F2, K2, M(22) );
R( c, d, e, a, b, F2, K2, M(23) );
R( b, c, d, e, a, F2, K2, M(24) );
R( a, b, c, d, e, F2, K2, M(25) );
R( e, a, b, c, d, F2, K2, M(26) );
R( d, e, a, b, c, F2, K2, M(27) );
R( c, d, e, a, b, F2, K2, M(28) );
R( b, c, d, e, a, F2, K2, M(29) );
R( a, b, c, d, e, F2, K2, M(30) );
R( e, a, b, c, d, F2, K2, M(31) );
R( d, e, a, b, c, F2, K2, M(32) );
R( c, d, e, a, b, F2, K2, M(33) );
R( b, c, d, e, a, F2, K2, M(34) );
R( a, b, c, d, e, F2, K2, M(35) );
R( e, a, b, c, d, F2, K2, M(36) );
R( d, e, a, b, c, F2, K2, M(37) );
R( c, d, e, a, b, F2, K2, M(38) );
R( b, c, d, e, a, F2, K2, M(39) );
R( a, b, c, d, e, F3, K3, M(40) );
R( e, a, b, c, d, F3, K3, M(41) );
R( d, e, a, b, c, F3, K3, M(42) );
R( c, d, e, a, b, F3, K3, M(43) );
R( b, c, d, e, a, F3, K3, M(44) );
R( a, b, c, d, e, F3, K3, M(45) );
R( e, a, b, c, d, F3, K3, M(46) );
R( d, e, a, b, c, F3, K3, M(47) );
R( c, d, e, a, b, F3, K3, M(48) );
R( b, c, d, e, a, F3, K3, M(49) );
R( a, b, c, d, e, F3, K3, M(50) );
R( e, a, b, c, d, F3, K3, M(51) );
R( d, e, a, b, c, F3, K3, M(52) );
R( c, d, e, a, b, F3, K3, M(53) );
R( b, c, d, e, a, F3, K3, M(54) );
R( a, b, c, d, e, F3, K3, M(55) );
R( e, a, b, c, d, F3, K3, M(56) );
R( d, e, a, b, c, F3, K3, M(57) );
R( c, d, e, a, b, F3, K3, M(58) );
R( b, c, d, e, a, F3, K3, M(59) );
R( a, b, c, d, e, F4, K4, M(60) );
R( e, a, b, c, d, F4, K4, M(61) );
R( d, e, a, b, c, F4, K4, M(62) );
R( c, d, e, a, b, F4, K4, M(63) );
R( b, c, d, e, a, F4, K4, M(64) );
R( a, b, c, d, e, F4, K4, M(65) );
R( e, a, b, c, d, F4, K4, M(66) );
R( d, e, a, b, c, F4, K4, M(67) );
R( c, d, e, a, b, F4, K4, M(68) );
R( b, c, d, e, a, F4, K4, M(69) );
R( a, b, c, d, e, F4, K4, M(70) );
R( e, a, b, c, d, F4, K4, M(71) );
R( d, e, a, b, c, F4, K4, M(72) );
R( c, d, e, a, b, F4, K4, M(73) );
R( b, c, d, e, a, F4, K4, M(74) );
R( a, b, c, d, e, F4, K4, M(75) );
R( e, a, b, c, d, F4, K4, M(76) );
R( d, e, a, b, c, F4, K4, M(77) );
R( c, d, e, a, b, F4, K4, M(78) );
R( b, c, d, e, a, F4, K4, M(79) );
/* Update chaining vars. */
ctx->h0 += a;
ctx->h1 += b;
ctx->h2 += c;
ctx->h3 += d;
ctx->h4 += e;
}
/*
* Update the message digest with the contents of BUF with length LEN.
*/
void
sha1_update(struct sha1_context *ctx, const byte *buf, uint len)
{
if (ctx->count)
{
/* Fill rest of internal buffer */
for (; len && ctx->count < SHA1_BLOCK_SIZE; len--)
ctx->buf[ctx->count++] = *buf++;
if (ctx->count < SHA1_BLOCK_SIZE)
return;
/* Process data from internal buffer */
sha1_transform(ctx, ctx->buf);
ctx->nblocks++;
ctx->count = 0;
}
if (!len)
return;
/* Process data from input buffer */
while (len >= SHA1_BLOCK_SIZE)
{
sha1_transform(ctx, buf);
ctx->nblocks++;
buf += SHA1_BLOCK_SIZE;
len -= SHA1_BLOCK_SIZE;
}
/* Copy remaining data to internal buffer */
memcpy(ctx->buf, buf, len);
ctx->count = len;
}
/*
* The routine final terminates the computation and returns the digest. The
* handle is prepared for a new cycle, but adding bytes to the handle will the
* destroy the returned buffer.
*
* Returns: 20 bytes representing the digest.
*/
byte *
sha1_final(struct sha1_context *ctx)
{
u32 t, msb, lsb;
sha1_update(ctx, NULL, 0); /* flush */
t = ctx->nblocks;
/* multiply by 64 to make a byte count */
lsb = t << 6;
msb = t >> 26;
/* add the count */
t = lsb;
if ((lsb += ctx->count) < t)
msb++;
/* multiply by 8 to make a bit count */
t = lsb;
lsb <<= 3;
msb <<= 3;
msb |= t >> 29;
if (ctx->count < 56)
{
/* enough room */
ctx->buf[ctx->count++] = 0x80; /* pad */
while (ctx->count < 56)
ctx->buf[ctx->count++] = 0; /* pad */
}
else
{
/* need one extra block */
ctx->buf[ctx->count++] = 0x80; /* pad character */
while (ctx->count < 64)
ctx->buf[ctx->count++] = 0;
sha1_update(ctx, NULL, 0); /* flush */
memset(ctx->buf, 0, 56); /* fill next block with zeroes */
}
/* append the 64 bit count */
ctx->buf[56] = msb >> 24;
ctx->buf[57] = msb >> 16;
ctx->buf[58] = msb >> 8;
ctx->buf[59] = msb;
ctx->buf[60] = lsb >> 24;
ctx->buf[61] = lsb >> 16;
ctx->buf[62] = lsb >> 8;
ctx->buf[63] = lsb;
sha1_transform(ctx, ctx->buf);
byte *p = ctx->buf;
#define X(a) do { put_u32(p, ctx->h##a); p += 4; } while(0)
X(0);
X(1);
X(2);
X(3);
X(4);
#undef X
return ctx->buf;
}
/*
* SHA1-HMAC
*/
/*
* Shortcut function which puts the hash value of the supplied buffer
* into outbuf which must have a size of 20 bytes.
*/
void
sha1_hash_buffer(byte *outbuf, const byte *buffer, uint length)
{
struct sha1_context ctx;
sha1_init(&ctx);
sha1_update(&ctx, buffer, length);
memcpy(outbuf, sha1_final(&ctx), SHA1_SIZE);
}
void
sha1_hmac_init(struct sha1_hmac_context *ctx, const byte *key, uint keylen)
{
byte keybuf[SHA1_BLOCK_SIZE], buf[SHA1_BLOCK_SIZE];
/* Hash the key if necessary */
if (keylen <= SHA1_BLOCK_SIZE)
{
memcpy(keybuf, key, keylen);
memset(keybuf + keylen, 0, SHA1_BLOCK_SIZE - keylen);
}
else
{
sha1_hash_buffer(keybuf, key, keylen);
memset(keybuf + SHA1_SIZE, 0, SHA1_BLOCK_SIZE - SHA1_SIZE);
}
/* Initialize the inner digest */
sha1_init(&ctx->ictx);
int i;
for (i = 0; i < SHA1_BLOCK_SIZE; i++)
buf[i] = keybuf[i] ^ 0x36;
sha1_update(&ctx->ictx, buf, SHA1_BLOCK_SIZE);
/* Initialize the outer digest */
sha1_init(&ctx->octx);
for (i = 0; i < SHA1_BLOCK_SIZE; i++)
buf[i] = keybuf[i] ^ 0x5c;
sha1_update(&ctx->octx, buf, SHA1_BLOCK_SIZE);
}
void
sha1_hmac_update(struct sha1_hmac_context *ctx, const byte *data, uint datalen)
{
/* Just update the inner digest */
sha1_update(&ctx->ictx, data, datalen);
}
byte *
sha1_hmac_final(struct sha1_hmac_context *ctx)
{
/* Finish the inner digest */
byte *isha = sha1_final(&ctx->ictx);
/* Finish the outer digest */
sha1_update(&ctx->octx, isha, SHA1_SIZE);
return sha1_final(&ctx->octx);
}
void
sha1_hmac(byte *outbuf, const byte *key, uint keylen, const byte *data, uint datalen)
{
struct sha1_hmac_context ctx;
sha1_hmac_init(&ctx, key, keylen);
sha1_hmac_update(&ctx, data, datalen);
memcpy(outbuf, sha1_hmac_final(&ctx), SHA1_SIZE);
}
/*
* BIRD Library -- SHA-1 Hash Function (FIPS 180-1, RFC 3174) and HMAC-SHA-1
*
* (c) 2015 CZ.NIC z.s.p.o.
*
* Based on the code from libucw-6.4
* (c) 2008--2009 Martin Mares <mj@ucw.cz>
*
* Based on the code from libgcrypt-1.2.3, which is
* (c) 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_SHA1_H_
#define _BIRD_SHA1_H_
#include "nest/bird.h"
#define SHA1_SIZE 20 /* Size of the SHA1 hash in its binary representation */
#define SHA1_HEX_SIZE 41 /* Buffer length for a string containing SHA1 in hexadecimal format. */
#define SHA1_BLOCK_SIZE 64 /* SHA1 splits input to blocks of this size. */
/*
* Internal SHA1 state.
* You should use it just as an opaque handle only.
*/
struct sha1_context {
u32 h0, h1, h2, h3, h4;
byte buf[SHA1_BLOCK_SIZE];
uint nblocks;
uint count;
};
void sha1_init(struct sha1_context *ctx); /* Initialize new algorithm run in the @ctx context. **/
/*
* Push another @len bytes of data pointed to by @buf onto the SHA1 hash
* currently in @ctx. You can call this any times you want on the same hash (and
* you do not need to reinitialize it by @sha1_init()). It has the same effect
* as concatenating all the data together and passing them at once.
*/
void sha1_update(struct sha1_context *ctx, const byte *buf, uint len);
/*
* No more @sha1_update() calls will be done. This terminates the hash and
* returns a pointer to it.
*
* Note that the pointer points into data in the @ctx context. If it ceases to
* exist, the pointer becomes invalid.
*/
byte *sha1_final(struct sha1_context *ctx);
/*
* A convenience one-shot function for SHA1 hash. It is equivalent to this
* snippet of code:
*