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Fix many off-by-one errors

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Manuel Pégourié-Gonnard 2013-09-11 17:33:28 +02:00 committed by Paul Bakker
parent 6dcf0bfcf4
commit 27d87fa6c4
2 changed files with 19 additions and 19 deletions
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24
library/x509write.c
View File

@ -440,7 +440,7 @@ int x509write_pubkey_der( rsa_context *rsa, unsigned char *buf, size_t size )
unsigned char *c; unsigned char *c;
size_t len = 0; size_t len = 0;
c = buf + size - 1; c = buf + size;
ASN1_CHK_ADD( len, x509_write_rsa_pubkey( &c, buf, rsa ) ); ASN1_CHK_ADD( len, x509_write_rsa_pubkey( &c, buf, rsa ) );
@ -473,7 +473,7 @@ int x509write_key_der( rsa_context *rsa, unsigned char *buf, size_t size )
unsigned char *c; unsigned char *c;
size_t len = 0; size_t len = 0;
c = buf + size - 1; c = buf + size;
ASN1_CHK_ADD( len, asn1_write_mpi( &c, buf, &rsa->QP ) ); ASN1_CHK_ADD( len, asn1_write_mpi( &c, buf, &rsa->QP ) );
ASN1_CHK_ADD( len, asn1_write_mpi( &c, buf, &rsa->DQ ) ); ASN1_CHK_ADD( len, asn1_write_mpi( &c, buf, &rsa->DQ ) );
@ -703,7 +703,7 @@ int x509write_csr_der( x509write_csr *ctx, unsigned char *buf, size_t size )
size_t pub_len = 0, sig_len = 0; size_t pub_len = 0, sig_len = 0;
size_t len = 0; size_t len = 0;
c = tmp_buf + 2048 - 1; c = tmp_buf + sizeof( tmp_buf );
ASN1_CHK_ADD( len, x509_write_extensions( &c, tmp_buf, ctx->extensions ) ); ASN1_CHK_ADD( len, x509_write_extensions( &c, tmp_buf, ctx->extensions ) );
@ -726,7 +726,7 @@ int x509write_csr_der( x509write_csr *ctx, unsigned char *buf, size_t size )
ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_CONTEXT_SPECIFIC ) ); ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_CONTEXT_SPECIFIC ) );
ASN1_CHK_ADD( pub_len, x509write_pubkey_der( pk_rsa( *ctx->key ), ASN1_CHK_ADD( pub_len, x509write_pubkey_der( pk_rsa( *ctx->key ),
tmp_buf, c - tmp_buf + 1 ) ); tmp_buf, c - tmp_buf ) );
c -= pub_len; c -= pub_len;
len += pub_len; len += pub_len;
@ -758,7 +758,7 @@ int x509write_csr_der( x509write_csr *ctx, unsigned char *buf, size_t size )
&sig_oid_len ); &sig_oid_len );
// TODO: use pk_get_len() // TODO: use pk_get_len()
c2 = buf + size - 1; c2 = buf + size;
ASN1_CHK_ADD( sig_len, x509_write_sig( &c2, buf, sig_oid, sig_oid_len, ASN1_CHK_ADD( sig_len, x509_write_sig( &c2, buf, sig_oid, sig_oid_len,
sig, pk_rsa( *ctx->key )->len ) ); sig, pk_rsa( *ctx->key )->len ) );
@ -784,7 +784,7 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
size_t sub_len = 0, pub_len = 0, sig_len = 0; size_t sub_len = 0, pub_len = 0, sig_len = 0;
size_t len = 0; size_t len = 0;
c = tmp_buf + 2048 - 1; c = tmp_buf + sizeof( tmp_buf );
// Generate correct OID // Generate correct OID
// //
@ -806,7 +806,7 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
* SubjectPublicKeyInfo * SubjectPublicKeyInfo
*/ */
ASN1_CHK_ADD( pub_len, x509write_pubkey_der( ctx->subject_key, ASN1_CHK_ADD( pub_len, x509write_pubkey_der( ctx->subject_key,
tmp_buf, c - tmp_buf + 1 ) ); tmp_buf, c - tmp_buf ) );
c -= pub_len; c -= pub_len;
len += pub_len; len += pub_len;
@ -864,7 +864,7 @@ int x509write_crt_der( x509write_cert *ctx, unsigned char *buf, size_t size )
rsa_pkcs1_sign( ctx->issuer_key, NULL, NULL, RSA_PRIVATE, ctx->md_alg, 0, hash, sig ); rsa_pkcs1_sign( ctx->issuer_key, NULL, NULL, RSA_PRIVATE, ctx->md_alg, 0, hash, sig );
c2 = buf + size - 1; c2 = buf + size;
ASN1_CHK_ADD( sig_len, x509_write_sig( &c2, buf, sig_oid, sig_oid_len, ASN1_CHK_ADD( sig_len, x509_write_sig( &c2, buf, sig_oid, sig_oid_len,
sig, ctx->issuer_key->len ) ); sig, ctx->issuer_key->len ) );
@ -942,7 +942,7 @@ int x509write_crt_pem( x509write_cert *crt, unsigned char *buf, size_t size )
} }
if( ( ret = x509write_pemify( PEM_BEGIN_CRT, PEM_END_CRT, if( ( ret = x509write_pemify( PEM_BEGIN_CRT, PEM_END_CRT,
output_buf + sizeof(output_buf) - 1 - ret, output_buf + sizeof(output_buf) - ret,
ret, buf, size ) ) != 0 ) ret, buf, size ) ) != 0 )
{ {
return( ret ); return( ret );
@ -963,7 +963,7 @@ int x509write_pubkey_pem( rsa_context *rsa, unsigned char *buf, size_t size )
} }
if( ( ret = x509write_pemify( PEM_BEGIN_PUBLIC_KEY, PEM_END_PUBLIC_KEY, if( ( ret = x509write_pemify( PEM_BEGIN_PUBLIC_KEY, PEM_END_PUBLIC_KEY,
output_buf + sizeof(output_buf) - 1 - ret, output_buf + sizeof(output_buf) - ret,
ret, buf, size ) ) != 0 ) ret, buf, size ) ) != 0 )
{ {
return( ret ); return( ret );
@ -984,7 +984,7 @@ int x509write_key_pem( rsa_context *rsa, unsigned char *buf, size_t size )
} }
if( ( ret = x509write_pemify( PEM_BEGIN_PRIVATE_KEY, PEM_END_PRIVATE_KEY, if( ( ret = x509write_pemify( PEM_BEGIN_PRIVATE_KEY, PEM_END_PRIVATE_KEY,
output_buf + sizeof(output_buf) - 1 - ret, output_buf + sizeof(output_buf) - ret,
ret, buf, size ) ) != 0 ) ret, buf, size ) ) != 0 )
{ {
return( ret ); return( ret );
@ -1005,7 +1005,7 @@ int x509write_csr_pem( x509write_csr *ctx, unsigned char *buf, size_t size )
} }
if( ( ret = x509write_pemify( PEM_BEGIN_CSR, PEM_END_CSR, if( ( ret = x509write_pemify( PEM_BEGIN_CSR, PEM_END_CSR,
output_buf + sizeof(output_buf) - 1 - ret, output_buf + sizeof(output_buf) - ret,
ret, buf, size ) ) != 0 ) ret, buf, size ) ) != 0 )
{ {
return( ret ); return( ret );

14
tests/suites/test_suite_x509write.function
View File

@ -21,7 +21,7 @@ void x509_csr_check( char *key_file, int md_type,
unsigned char buf[4000]; unsigned char buf[4000];
unsigned char check_buf[4000]; unsigned char check_buf[4000];
int ret; int ret;
size_t olen = 2000; size_t olen = sizeof( check_buf );
FILE *f; FILE *f;
char *subject_name = "C=NL,O=PolarSSL,CN=PolarSSL Server 1"; char *subject_name = "C=NL,O=PolarSSL,CN=PolarSSL Server 1";
@ -36,21 +36,21 @@ void x509_csr_check( char *key_file, int md_type,
x509write_csr_set_rsa_key( &req, &rsa ); x509write_csr_set_rsa_key( &req, &rsa );
TEST_ASSERT( x509write_csr_set_subject_name( &req, subject_name ) == 0 ); TEST_ASSERT( x509write_csr_set_subject_name( &req, subject_name ) == 0 );
ret = x509write_csr_der( &req, buf, 4000 ); ret = x509write_csr_der( &req, buf, sizeof( buf ) );
TEST_ASSERT( ret >= 0 ); TEST_ASSERT( ret >= 0 );
c = buf + 3999 - ret; c = buf + sizeof( buf ) - ret;
f = fopen( cert_req_check_file, "r" ); f = fopen( cert_req_check_file, "r" );
TEST_ASSERT( f != NULL ); TEST_ASSERT( f != NULL );
fread( check_buf, 1, 4000, f ); fread( check_buf, 1, sizeof( check_buf ), f );
fclose( f ); fclose( f );
pem_init( &pem ); pem_init( &pem );
pem_read_buffer( &pem, "-----BEGIN CERTIFICATE REQUEST-----", "-----END CERTIFICATE REQUEST-----", check_buf, NULL, 0, &olen ); pem_read_buffer( &pem, "-----BEGIN CERTIFICATE REQUEST-----", "-----END CERTIFICATE REQUEST-----", check_buf, NULL, 0, &olen );
TEST_ASSERT( memcmp( c, pem.buf, pem.buflen ) == 0 );
TEST_ASSERT( pem.buflen == (size_t) ret ); TEST_ASSERT( pem.buflen == (size_t) ret );
TEST_ASSERT( memcmp( c, pem.buf, pem.buflen ) == 0 );
x509write_csr_free( &req ); x509write_csr_free( &req );
rsa_free( &rsa ); rsa_free( &rsa );
@ -73,7 +73,7 @@ void x509_crt_check( char *subject_key_file, char *subject_pwd,
unsigned char check_buf[5000]; unsigned char check_buf[5000];
mpi serial; mpi serial;
int ret; int ret;
size_t olen = 2000; size_t olen = sizeof( check_buf );
FILE *f; FILE *f;
mpi_init( &serial ); mpi_init( &serial );
@ -103,7 +103,7 @@ void x509_crt_check( char *subject_key_file, char *subject_pwd,
ret = x509write_crt_der( &crt, buf, sizeof(buf) ); ret = x509write_crt_der( &crt, buf, sizeof(buf) );
TEST_ASSERT( ret >= 0 ); TEST_ASSERT( ret >= 0 );
c = buf + 3999 - ret; c = buf + sizeof( buf ) - ret;
f = fopen( cert_check_file, "r" ); f = fopen( cert_check_file, "r" );
TEST_ASSERT( f != NULL ); TEST_ASSERT( f != NULL );