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authorChristian von Roques <[email protected]>2011-09-06 19:23:37 +0200
committerChristian von Roques <[email protected]>2011-09-06 19:45:11 +0200
commit82897cc8f399fab832148711b586215c9a3f7af1 (patch)
treee51d0665519efd90889eb14cc2392d9bca9ee89b /lib/crypto/c_src
parent22dae863060e0d66fa268f6d1cd4d6f084b850ab (diff)
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Support 'md2' hash in crypto:rsa_sign/3 and crypto:rsa_verify/4
Diffstat (limited to 'lib/crypto/c_src')
-rw-r--r--lib/crypto/c_src/crypto.c58
1 files changed, 30 insertions, 28 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index c781ccb302..83772d9023 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -43,6 +43,7 @@
#include <openssl/aes.h>
#include <openssl/md5.h>
#include <openssl/md4.h>
+#include <openssl/md2.h>
#include <openssl/sha.h>
#include <openssl/bn.h>
#include <openssl/objects.h>
@@ -267,6 +268,7 @@ static ERL_NIF_TERM atom_true;
static ERL_NIF_TERM atom_false;
static ERL_NIF_TERM atom_sha;
static ERL_NIF_TERM atom_md5;
+static ERL_NIF_TERM atom_md2;
static ERL_NIF_TERM atom_ripemd160;
static ERL_NIF_TERM atom_error;
static ERL_NIF_TERM atom_rsa_pkcs1_padding;
@@ -337,6 +339,7 @@ static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
atom_false = enif_make_atom(env,"false");
atom_sha = enif_make_atom(env,"sha");
atom_md5 = enif_make_atom(env,"md5");
+ atom_md2 = enif_make_atom(env,"md2");
atom_ripemd160 = enif_make_atom(env,"ripemd160");
atom_error = enif_make_atom(env,"error");
atom_rsa_pkcs1_padding = enif_make_atom(env,"rsa_pkcs1_padding");
@@ -1047,16 +1050,28 @@ static ERL_NIF_TERM dss_verify(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv
return(i > 0) ? atom_true : atom_false;
}
+struct hash_def {
+ int type;
+ unsigned int m_len;
+ unsigned char * (*func) (const unsigned char *d, size_t n, unsigned char *md);
+};
+
+static const struct hash_def md2_hash_def = { NID_md2, MD2_DIGEST_LENGTH, &MD2};
+static const struct hash_def md5_hash_def = { NID_md5, MD5_DIGEST_LENGTH, &MD5};
+static const struct hash_def sha1_hash_def = { NID_sha1, SHA_DIGEST_LENGTH, &SHA1};
+
static ERL_NIF_TERM rsa_verify(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Type, Data, Signature, Key=[E,N]) */
ErlNifBinary data_bin, sign_bin;
unsigned char hmacbuf[SHA_DIGEST_LENGTH];
ERL_NIF_TERM head, tail, ret;
- int i, is_sha;
+ int i;
RSA* rsa = RSA_new();
+ const struct hash_def *hash_def = NULL;
- if (argv[0] == atom_sha) is_sha = 1;
- else if (argv[0] == atom_md5) is_sha = 0;
+ if (argv[0] == atom_sha) hash_def = &sha1_hash_def;
+ else if (argv[0] == atom_md5) hash_def = &md5_hash_def;
+ else if (argv[0] == atom_md2) hash_def = &md2_hash_def;
else goto badarg;
if (!inspect_mpint(env, argv[1], &data_bin)
@@ -1070,16 +1085,9 @@ static ERL_NIF_TERM rsa_verify(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv
ret = enif_make_badarg(env);
}
else {
- if (is_sha) {
- SHA1(data_bin.data+4, data_bin.size-4, hmacbuf);
- i = RSA_verify(NID_sha1, hmacbuf, SHA_DIGEST_LENGTH,
- sign_bin.data+4, sign_bin.size-4, rsa);
- }
- else {
- MD5(data_bin.data+4, data_bin.size-4, hmacbuf);
- i = RSA_verify(NID_md5, hmacbuf, MD5_DIGEST_LENGTH,
- sign_bin.data+4, sign_bin.size-4, rsa);
- }
+ (void) *hash_def->func(data_bin.data+4, data_bin.size-4, hmacbuf);
+ i = RSA_verify(hash_def->type, hmacbuf, hash_def->m_len,
+ sign_bin.data+4, sign_bin.size-4, rsa);
ret = (i==1 ? atom_true : atom_false);
}
RSA_free(rsa);
@@ -1221,10 +1229,12 @@ static ERL_NIF_TERM rsa_sign_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM ar
unsigned char hmacbuf[SHA_DIGEST_LENGTH];
unsigned rsa_s_len;
RSA *rsa = RSA_new();
- int i, is_sha;
+ int i;
+ const struct hash_def *hash_def = NULL;
- if (argv[0] == atom_sha) is_sha = 1;
- else if (argv[0] == atom_md5) is_sha = 0;
+ if (argv[0] == atom_sha) hash_def = &sha1_hash_def;
+ else if (argv[0] == atom_md5) hash_def = &md5_hash_def;
+ else if (argv[0] == atom_md2) hash_def = &md2_hash_def;
else goto badarg;
if (!inspect_mpint(env,argv[1],&data_bin)
@@ -1240,18 +1250,10 @@ static ERL_NIF_TERM rsa_sign_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM ar
return enif_make_badarg(env);
}
enif_alloc_binary(RSA_size(rsa), &ret_bin);
- if (is_sha) {
- SHA1(data_bin.data+4, data_bin.size-4, hmacbuf);
- ERL_VALGRIND_ASSERT_MEM_DEFINED(hmacbuf, SHA_DIGEST_LENGTH);
- i = RSA_sign(NID_sha1, hmacbuf, SHA_DIGEST_LENGTH,
- ret_bin.data, &rsa_s_len, rsa);
- }
- else {
- MD5(data_bin.data+4, data_bin.size-4, hmacbuf);
- ERL_VALGRIND_ASSERT_MEM_DEFINED(hmacbuf, MD5_DIGEST_LENGTH);
- i = RSA_sign(NID_md5, hmacbuf,MD5_DIGEST_LENGTH,
- ret_bin.data, &rsa_s_len, rsa);
- }
+ (void) *hash_def->func(data_bin.data+4, data_bin.size-4, hmacbuf);
+ ERL_VALGRIND_ASSERT_MEM_DEFINED(hmacbuf, hash_def->m_len);
+ i = RSA_sign(hash_def->type, hmacbuf, hash_def->m_len,
+ ret_bin.data, &rsa_s_len, rsa);
RSA_free(rsa);
if (i) {
ERL_VALGRIND_MAKE_MEM_DEFINED(ret_bin.data, rsa_s_len);