X-Git-Url: http://git.silcnet.org/gitweb/?a=blobdiff_plain;f=lib%2Fsilccrypt%2Fsilcpkcs1.c;h=5db3f82a72e2795f26ac133d6d25de6de8846c89;hb=e7b6c157b80152bf9fb9266e6bdd93f9fb0db776;hp=57f25e675fa2b597926db3bd163c85cb2de2ed60;hpb=410642a14d4185abd75715cee3f5177cd55b1ceb;p=silc.git diff --git a/lib/silccrypt/silcpkcs1.c b/lib/silccrypt/silcpkcs1.c index 57f25e67..5db3f82a 100644 --- a/lib/silccrypt/silcpkcs1.c +++ b/lib/silccrypt/silcpkcs1.c @@ -4,7 +4,7 @@ Author: Pekka Riikonen - Copyright (C) 2003 - 2006 Pekka Riikonen + Copyright (C) 2003 - 2007 Pekka Riikonen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -20,6 +20,7 @@ #include "silc.h" #include "rsa.h" +#include "silcpkcs1_i.h" /************************** PKCS #1 message format ***************************/ @@ -74,14 +75,15 @@ SilcBool silc_pkcs1_encode(SilcPkcs1BlockType bt, case SILC_PKCS1_BT_PUB: /* Encryption */ + if (!rng) { + SILC_LOG_ERROR(("Cannot encrypt: random number generator not provided")); + return FALSE; + } /* It is guaranteed this routine does not return zero byte. */ - if (rng) - for (i = 2; i < padlen; i++) - dest_data[i] = silc_rng_get_byte_fast(rng); - else - for (i = 2; i < padlen; i++) - dest_data[i] = silc_rng_global_get_byte_fast(); + for (i = 2; i < padlen; i++) + dest_data[i] = silc_rng_get_byte_fast(rng); + break; } @@ -167,10 +169,7 @@ SilcBool silc_pkcs1_decode(SilcPkcs1BlockType bt, /* Generates RSA key pair. */ -SilcBool silc_pkcs1_generate_key(SilcUInt32 keylen, - SilcRng rng, - void **ret_public_key, - void **ret_private_key) +SILC_PKCS_ALG_GENERATE_KEY(silc_pkcs1_generate_key) { SilcUInt32 prime_bits = keylen / 2; SilcMPInt p, q; @@ -203,7 +202,7 @@ SilcBool silc_pkcs1_generate_key(SilcUInt32 keylen, } /* Generate the actual keys */ - if (!rsa_generate_keys(keylen, &p, &q, ret_public_key, ret_private_key)) + if (!silc_rsa_generate_keys(keylen, &p, &q, ret_public_key, ret_private_key)) return FALSE; silc_mp_uninit(&p); @@ -214,20 +213,18 @@ SilcBool silc_pkcs1_generate_key(SilcUInt32 keylen, /* Import PKCS #1 compliant public key */ -SilcBool silc_pkcs1_import_public_key(unsigned char *key, - SilcUInt32 key_len, - void **ret_public_key) +SILC_PKCS_ALG_IMPORT_PUBLIC_KEY(silc_pkcs1_import_public_key) { SilcAsn1 asn1 = NULL; SilcBufferStruct alg_key; RsaPublicKey *pubkey; if (!ret_public_key) - return FALSE; + return 0; - asn1 = silc_asn1_alloc(); + asn1 = silc_asn1_alloc(NULL); if (!asn1) - return FALSE; + return 0; /* Allocate RSA public key */ *ret_public_key = pubkey = silc_calloc(1, sizeof(*pubkey)); @@ -239,34 +236,34 @@ SilcBool silc_pkcs1_import_public_key(unsigned char *key, if (!silc_asn1_decode(asn1, &alg_key, SILC_ASN1_OPTS(SILC_ASN1_ALLOC), SILC_ASN1_SEQUENCE, - SILC_ASN1_INT(&pubkey->n), - SILC_ASN1_INT(&pubkey->e), + SILC_ASN1_INT(&pubkey->n), + SILC_ASN1_INT(&pubkey->e), SILC_ASN1_END, SILC_ASN1_END)) goto err; /* Set key length */ - pubkey->bits = silc_mp_sizeinbase(&pubkey->n, 2); + pubkey->bits = ((silc_mp_sizeinbase(&pubkey->n, 2) + 7) / 8) * 8; silc_asn1_free(asn1); - return TRUE; + return key_len; err: + silc_free(pubkey); silc_asn1_free(asn1); - return FALSE; + return 0; } /* Export PKCS #1 compliant public key */ -unsigned char *silc_pkcs1_export_public_key(void *public_key, - SilcUInt32 *ret_len) +SILC_PKCS_ALG_EXPORT_PUBLIC_KEY(silc_pkcs1_export_public_key) { RsaPublicKey *key = public_key; SilcAsn1 asn1 = NULL; SilcBufferStruct alg_key; unsigned char *ret; - asn1 = silc_asn1_alloc(); + asn1 = silc_asn1_alloc(stack); if (!asn1) goto err; @@ -275,8 +272,8 @@ unsigned char *silc_pkcs1_export_public_key(void *public_key, if (!silc_asn1_encode(asn1, &alg_key, SILC_ASN1_OPTS(SILC_ASN1_ALLOC), SILC_ASN1_SEQUENCE, - SILC_ASN1_INT(&key->n), - SILC_ASN1_INT(&key->e), + SILC_ASN1_INT(&key->n), + SILC_ASN1_INT(&key->e), SILC_ASN1_END, SILC_ASN1_END)) goto err; @@ -293,7 +290,7 @@ unsigned char *silc_pkcs1_export_public_key(void *public_key, /* Returns key length */ -SilcUInt32 silc_pkcs1_public_key_bitlen(void *public_key) +SILC_PKCS_ALG_PUBLIC_KEY_BITLEN(silc_pkcs1_public_key_bitlen) { RsaPublicKey *key = public_key; return key->bits; @@ -301,7 +298,7 @@ SilcUInt32 silc_pkcs1_public_key_bitlen(void *public_key) /* Copy public key */ -void *silc_pkcs1_public_key_copy(void *public_key) +SILC_PKCS_ALG_PUBLIC_KEY_COPY(silc_pkcs1_public_key_copy) { RsaPublicKey *key = public_key, *new_key; @@ -320,7 +317,7 @@ void *silc_pkcs1_public_key_copy(void *public_key) /* Compare public keys */ -SilcBool silc_pkcs1_public_key_compare(void *key1, void *key2) +SILC_PKCS_ALG_PUBLIC_KEY_COMPARE(silc_pkcs1_public_key_compare) { RsaPublicKey *k1 = key1, *k2 = key2; @@ -336,7 +333,7 @@ SilcBool silc_pkcs1_public_key_compare(void *key1, void *key2) /* Frees public key */ -void silc_pkcs1_public_key_free(void *public_key) +SILC_PKCS_ALG_PUBLIC_KEY_FREE(silc_pkcs1_public_key_free) { RsaPublicKey *key = public_key; @@ -347,20 +344,19 @@ void silc_pkcs1_public_key_free(void *public_key) /* Import PKCS #1 compliant private key */ -SilcBool silc_pkcs1_import_private_key(unsigned char *key, - SilcUInt32 key_len, - void **ret_private_key) +SILC_PKCS_ALG_IMPORT_PRIVATE_KEY(silc_pkcs1_import_private_key) { SilcAsn1 asn1; SilcBufferStruct alg_key; RsaPrivateKey *privkey; + SilcUInt32 ver; if (!ret_private_key) - return FALSE; + return 0; - asn1 = silc_asn1_alloc(); + asn1 = silc_asn1_alloc(NULL); if (!asn1) - return FALSE; + return 0; /* Allocate RSA private key */ *ret_private_key = privkey = silc_calloc(1, sizeof(*privkey)); @@ -372,64 +368,63 @@ SilcBool silc_pkcs1_import_private_key(unsigned char *key, if (!silc_asn1_decode(asn1, &alg_key, SILC_ASN1_OPTS(SILC_ASN1_ALLOC), SILC_ASN1_SEQUENCE, - SILC_ASN1_INT(NULL), - SILC_ASN1_INT(&privkey->n), - SILC_ASN1_INT(&privkey->e), - SILC_ASN1_INT(&privkey->d), - SILC_ASN1_INT(&privkey->p), - SILC_ASN1_INT(&privkey->q), - SILC_ASN1_INT(&privkey->dP), - SILC_ASN1_INT(&privkey->dQ), - SILC_ASN1_INT(&privkey->qP), + SILC_ASN1_SHORT_INT(&ver), + SILC_ASN1_INT(&privkey->n), + SILC_ASN1_INT(&privkey->e), + SILC_ASN1_INT(&privkey->d), + SILC_ASN1_INT(&privkey->p), + SILC_ASN1_INT(&privkey->q), + SILC_ASN1_INT(&privkey->dP), + SILC_ASN1_INT(&privkey->dQ), + SILC_ASN1_INT(&privkey->qP), SILC_ASN1_END, SILC_ASN1_END)) goto err; + if (ver != 0) + goto err; + /* Set key length */ - privkey->bits = silc_mp_sizeinbase(&privkey->n, 2); + privkey->bits = ((silc_mp_sizeinbase(&privkey->n, 2) + 7) / 8) * 8; silc_asn1_free(asn1); - return TRUE; + return key_len; err: + silc_free(privkey); silc_asn1_free(asn1); - return FALSE; + return 0; } /* Export PKCS #1 compliant private key */ -unsigned char *silc_pkcs1_export_private_key(void *private_key, - SilcUInt32 *ret_len) +SILC_PKCS_ALG_EXPORT_PRIVATE_KEY(silc_pkcs1_export_private_key) { RsaPrivateKey *key = private_key; SilcAsn1 asn1; SilcBufferStruct alg_key; - SilcMPInt version; unsigned char *ret; - asn1 = silc_asn1_alloc(); + asn1 = silc_asn1_alloc(stack); if (!asn1) return FALSE; /* Encode to PKCS #1 private key */ - silc_mp_init(&version); - silc_mp_set_ui(&version, 0); memset(&alg_key, 0, sizeof(alg_key)); if (!silc_asn1_encode(asn1, &alg_key, SILC_ASN1_OPTS(SILC_ASN1_ALLOC), SILC_ASN1_SEQUENCE, - SILC_ASN1_INT(&version), - SILC_ASN1_INT(&key->n), - SILC_ASN1_INT(&key->e), - SILC_ASN1_INT(&key->d), - SILC_ASN1_INT(&key->p), - SILC_ASN1_INT(&key->q), - SILC_ASN1_INT(&key->dP), - SILC_ASN1_INT(&key->dQ), - SILC_ASN1_INT(&key->qP), + SILC_ASN1_SHORT_INT(0), + SILC_ASN1_INT(&key->n), + SILC_ASN1_INT(&key->e), + SILC_ASN1_INT(&key->d), + SILC_ASN1_INT(&key->p), + SILC_ASN1_INT(&key->q), + SILC_ASN1_INT(&key->dP), + SILC_ASN1_INT(&key->dQ), + SILC_ASN1_INT(&key->qP), SILC_ASN1_END, SILC_ASN1_END)) goto err; - silc_mp_uninit(&version); ret = silc_buffer_steal(&alg_key, ret_len); silc_asn1_free(asn1); @@ -443,7 +438,7 @@ unsigned char *silc_pkcs1_export_private_key(void *private_key, /* Returns key length */ -SilcUInt32 silc_pkcs1_private_key_bitlen(void *private_key) +SILC_PKCS_ALG_PRIVATE_KEY_BITLEN(silc_pkcs1_private_key_bitlen) { RsaPrivateKey *key = private_key; return key->bits; @@ -451,7 +446,7 @@ SilcUInt32 silc_pkcs1_private_key_bitlen(void *private_key) /* Frees private key */ -void silc_pkcs1_private_key_free(void *private_key) +SILC_PKCS_ALG_PRIVATE_KEY_FREE(silc_pkcs1_private_key_free) { RsaPrivateKey *key = private_key; @@ -468,143 +463,349 @@ void silc_pkcs1_private_key_free(void *private_key) /* PKCS #1 RSA routines */ -SilcBool silc_pkcs1_encrypt(void *public_key, - unsigned char *src, - SilcUInt32 src_len, - unsigned char *dst, - SilcUInt32 dst_size, - SilcUInt32 *ret_dst_len) +SILC_PKCS_ALG_ENCRYPT(silc_pkcs1_encrypt) { RsaPublicKey *key = public_key; SilcMPInt mp_tmp; SilcMPInt mp_dst; unsigned char padded[2048 + 1]; SilcUInt32 len = (key->bits + 7) / 8; + SilcStack stack; - if (sizeof(padded) < len) - return FALSE; - if (dst_size < len) - return FALSE; + if (sizeof(padded) < len) { + encrypt_cb(FALSE, NULL, 0, context); + return NULL; + } /* Pad data */ if (!silc_pkcs1_encode(SILC_PKCS1_BT_PUB, src, src_len, - padded, len, NULL)) - return FALSE; + padded, len, rng)) { + encrypt_cb(FALSE, NULL, 0, context); + return NULL; + } + + stack = silc_stack_alloc(2048, silc_crypto_stack()); - silc_mp_init(&mp_tmp); - silc_mp_init(&mp_dst); + silc_mp_sinit(stack, &mp_tmp); + silc_mp_sinit(stack, &mp_dst); /* Data to MP */ silc_mp_bin2mp(padded, len, &mp_tmp); /* Encrypt */ - rsa_public_operation(key, &mp_tmp, &mp_dst); + silc_rsa_public_operation(key, &mp_tmp, &mp_dst); /* MP to data */ - silc_mp_mp2bin_noalloc(&mp_dst, dst, len); - *ret_dst_len = len; + silc_mp_mp2bin_noalloc(&mp_dst, padded, len); + + /* Deliver result */ + encrypt_cb(TRUE, padded, len, context); memset(padded, 0, sizeof(padded)); - silc_mp_uninit(&mp_tmp); - silc_mp_uninit(&mp_dst); + silc_mp_suninit(stack, &mp_tmp); + silc_mp_suninit(stack, &mp_dst); + silc_stack_free(stack); - return TRUE; + return NULL; } -SilcBool silc_pkcs1_decrypt(void *private_key, - unsigned char *src, - SilcUInt32 src_len, - unsigned char *dst, - SilcUInt32 dst_size, - SilcUInt32 *ret_dst_len) +SILC_PKCS_ALG_DECRYPT(silc_pkcs1_decrypt) { RsaPrivateKey *key = private_key; SilcMPInt mp_tmp; SilcMPInt mp_dst; unsigned char *padded, unpadded[2048 + 1]; - SilcUInt32 padded_len; + SilcUInt32 padded_len, dst_len; + SilcStack stack; - if (dst_size < (key->bits + 7) / 8) - return FALSE; + if (sizeof(unpadded) < (key->bits + 7) / 8) { + decrypt_cb(FALSE, NULL, 0, context); + return NULL; + } + + stack = silc_stack_alloc(2048, silc_crypto_stack()); - silc_mp_init(&mp_tmp); - silc_mp_init(&mp_dst); + silc_mp_sinit(stack, &mp_tmp); + silc_mp_sinit(stack, &mp_dst); /* Data to MP */ silc_mp_bin2mp(src, src_len, &mp_tmp); /* Decrypt */ - rsa_private_operation(key, &mp_tmp, &mp_dst); + silc_rsa_private_operation(key, &mp_tmp, &mp_dst); /* MP to data */ padded = silc_mp_mp2bin(&mp_dst, (key->bits + 7) / 8, &padded_len); /* Unpad data */ if (!silc_pkcs1_decode(SILC_PKCS1_BT_PUB, padded, padded_len, - unpadded, sizeof(unpadded), ret_dst_len)) { + unpadded, sizeof(unpadded), &dst_len)) { memset(padded, 0, padded_len); silc_free(padded); - silc_mp_uninit(&mp_tmp); - silc_mp_uninit(&mp_dst); - return FALSE; + silc_mp_suninit(stack, &mp_tmp); + silc_mp_suninit(stack, &mp_dst); + decrypt_cb(FALSE, NULL, 0, context); + return NULL; } - /* Copy to destination */ - memcpy(dst, unpadded, *ret_dst_len); + /* Deliver result */ + decrypt_cb(TRUE, unpadded, dst_len, context); memset(padded, 0, padded_len); memset(unpadded, 0, sizeof(unpadded)); silc_free(padded); - silc_mp_uninit(&mp_tmp); - silc_mp_uninit(&mp_dst); + silc_mp_suninit(stack, &mp_tmp); + silc_mp_suninit(stack, &mp_dst); + silc_stack_free(stack); - return TRUE; + return NULL; } -SilcBool silc_pkcs1_sign(void *private_key, - unsigned char *src, - SilcUInt32 src_len, - unsigned char *signature, - SilcUInt32 signature_size, - SilcUInt32 *ret_signature_len, - SilcHash hash) +/* PKCS #1 sign with appendix, hash OID included in the signature */ + +SILC_PKCS_ALG_SIGN(silc_pkcs1_sign) { - return FALSE; + RsaPrivateKey *key = private_key; + unsigned char padded[2048 + 1], hashr[SILC_HASH_MAXLEN]; + SilcMPInt mp_tmp; + SilcMPInt mp_dst; + SilcBufferStruct di; + SilcUInt32 len = (key->bits + 7) / 8; + const char *oid; + SilcStack stack; + SilcAsn1 asn1; + + SILC_LOG_DEBUG(("Sign")); + + if (sizeof(padded) < len) { + sign_cb(FALSE, NULL, 0, context); + return NULL; + } + + oid = silc_hash_get_oid(hash); + if (!oid) { + sign_cb(FALSE, NULL, 0, context); + return NULL; + } + + stack = silc_stack_alloc(2048, silc_crypto_stack()); + + asn1 = silc_asn1_alloc(stack); + if (!asn1) { + silc_stack_free(stack); + sign_cb(FALSE, NULL, 0, context); + return NULL; + } + + /* Compute hash */ + if (compute_hash) { + silc_hash_make(hash, src, src_len, hashr); + src = hashr; + src_len = silc_hash_len(hash); + } + + /* Encode digest info */ + memset(&di, 0, sizeof(di)); + if (!silc_asn1_encode(asn1, &di, + SILC_ASN1_SEQUENCE, + SILC_ASN1_SEQUENCE, + SILC_ASN1_OID(oid), + SILC_ASN1_NULL(TRUE), + SILC_ASN1_END, + SILC_ASN1_OCTET_STRING(src, src_len), + SILC_ASN1_END, SILC_ASN1_END)) { + silc_asn1_free(asn1); + silc_stack_free(stack); + sign_cb(FALSE, NULL, 0, context); + return NULL; + } + SILC_LOG_HEXDUMP(("DigestInfo"), silc_buffer_data(&di), + silc_buffer_len(&di)); + + /* Pad data */ + if (!silc_pkcs1_encode(SILC_PKCS1_BT_PRV1, silc_buffer_data(&di), + silc_buffer_len(&di), padded, len, NULL)) { + silc_asn1_free(asn1); + silc_stack_free(stack); + sign_cb(FALSE, NULL, 0, context); + return NULL; + } + + silc_mp_sinit(stack, &mp_tmp); + silc_mp_sinit(stack, &mp_dst); + + /* Data to MP */ + silc_mp_bin2mp(padded, len, &mp_tmp); + + /* Sign */ + silc_rsa_private_operation(key, &mp_tmp, &mp_dst); + + /* MP to data */ + silc_mp_mp2bin_noalloc(&mp_dst, padded, len); + + /* Deliver result */ + sign_cb(TRUE, padded, len, context); + + memset(padded, 0, sizeof(padded)); + if (compute_hash) + memset(hashr, 0, sizeof(hashr)); + silc_mp_suninit(stack, &mp_tmp); + silc_mp_suninit(stack, &mp_dst); + silc_asn1_free(asn1); + silc_stack_free(stack); + + return NULL; } -SilcBool silc_pkcs1_verify(void *public_key, - unsigned char *signature, - SilcUInt32 signature_len, - unsigned char *data, - SilcUInt32 data_len, - SilcHash hash) +/* PKCS #1 verification with appendix. */ + +SILC_PKCS_ALG_VERIFY(silc_pkcs1_verify) { - return FALSE; + RsaPublicKey *key = public_key; + SilcBool ret = FALSE; + SilcMPInt mp_tmp2; + SilcMPInt mp_dst; + unsigned char *verify, unpadded[2048 + 1], hashr[SILC_HASH_MAXLEN]; + SilcUInt32 verify_len, len = (key->bits + 7) / 8; + SilcBufferStruct di, ldi; + SilcBool has_null = TRUE; + SilcHash ihash = NULL; + SilcStack stack; + SilcAsn1 asn1; + char *oid; + + SILC_LOG_DEBUG(("Verify signature")); + + stack = silc_stack_alloc(2048, silc_crypto_stack()); + + asn1 = silc_asn1_alloc(stack); + if (!asn1) { + verify_cb(FALSE, context); + return NULL; + } + + silc_mp_sinit(stack, &mp_tmp2); + silc_mp_sinit(stack, &mp_dst); + + /* Format the signature into MP int */ + silc_mp_bin2mp(signature, signature_len, &mp_tmp2); + + /* Verify */ + silc_rsa_public_operation(key, &mp_tmp2, &mp_dst); + + /* MP to data */ + verify = silc_mp_mp2bin(&mp_dst, len, &verify_len); + + /* Unpad data */ + if (!silc_pkcs1_decode(SILC_PKCS1_BT_PRV1, verify, verify_len, + unpadded, sizeof(unpadded), &len)) + goto err; + silc_buffer_set(&di, unpadded, len); + + /* If hash isn't given, allocate the one given in digest info */ + if (!hash) { + has_null = FALSE; + + /* Decode digest info */ + if (!silc_asn1_decode(asn1, &di, + SILC_ASN1_OPTS(SILC_ASN1_ACCUMUL), + SILC_ASN1_SEQUENCE, + SILC_ASN1_SEQUENCE, + SILC_ASN1_OID(&oid), + SILC_ASN1_NULL_T(SILC_ASN1_OPTIONAL, + SILC_ASN1_TAG_NULL, &has_null), + SILC_ASN1_END, + SILC_ASN1_END, SILC_ASN1_END)) + goto err; + + if (!silc_hash_alloc_by_oid(oid, &ihash)) { + SILC_LOG_DEBUG(("Unknown OID %s", oid)); + goto err; + } + hash = ihash; + } + + /* Hash the data */ + silc_hash_make(hash, data, data_len, hashr); + data = hashr; + data_len = silc_hash_len(hash); + oid = (char *)silc_hash_get_oid(hash); + + /* Encode digest info for comparison */ + memset(&ldi, 0, sizeof(ldi)); + if (!silc_asn1_encode(asn1, &ldi, + SILC_ASN1_OPTS(SILC_ASN1_ACCUMUL), + SILC_ASN1_SEQUENCE, + SILC_ASN1_SEQUENCE, + SILC_ASN1_OID(oid), + SILC_ASN1_NULL(has_null), + SILC_ASN1_END, + SILC_ASN1_OCTET_STRING(data, data_len), + SILC_ASN1_END, SILC_ASN1_END)) + goto err; + + SILC_LOG_HEXDUMP(("DigestInfo remote"), silc_buffer_data(&di), + silc_buffer_len(&di)); + SILC_LOG_HEXDUMP(("DigestInfo local"), silc_buffer_data(&ldi), + silc_buffer_len(&ldi)); + + /* Compare */ + if (silc_buffer_len(&di) == silc_buffer_len(&ldi) && + !memcmp(silc_buffer_data(&di), silc_buffer_data(&ldi), + silc_buffer_len(&ldi))) + ret = TRUE; + + /* Deliver result */ + verify_cb(ret, context); + + memset(verify, 0, verify_len); + memset(unpadded, 0, sizeof(unpadded)); + silc_free(verify); + silc_mp_suninit(stack, &mp_tmp2); + silc_mp_suninit(stack, &mp_dst); + if (hash) + memset(hashr, 0, sizeof(hashr)); + if (ihash) + silc_hash_free(ihash); + silc_asn1_free(asn1); + silc_stack_free(stack); + + return NULL; + + err: + memset(verify, 0, verify_len); + silc_free(verify); + silc_mp_suninit(stack, &mp_tmp2); + silc_mp_suninit(stack, &mp_dst); + if (ihash) + silc_hash_free(ihash); + silc_asn1_free(asn1); + silc_stack_free(stack); + + verify_cb(FALSE, context); + return NULL; } /* PKCS #1 sign without hash oid */ -SilcBool silc_pkcs1_sign_no_oid(void *private_key, - unsigned char *src, - SilcUInt32 src_len, - unsigned char *signature, - SilcUInt32 signature_size, - SilcUInt32 *ret_signature_len, - SilcHash hash) +SILC_PKCS_ALG_SIGN(silc_pkcs1_sign_no_oid) { RsaPrivateKey *key = private_key; SilcMPInt mp_tmp; SilcMPInt mp_dst; unsigned char padded[2048 + 1], hashr[SILC_HASH_MAXLEN]; SilcUInt32 len = (key->bits + 7) / 8; + SilcStack stack; - if (sizeof(padded) < len) - return FALSE; - if (signature_size < len) - return FALSE; + SILC_LOG_DEBUG(("Sign")); + + if (sizeof(padded) < len) { + sign_cb(FALSE, NULL, 0, context); + return NULL; + } /* Compute hash if requested */ - if (hash) { + if (compute_hash) { silc_hash_make(hash, src, src_len, hashr); src = hashr; src_len = silc_hash_len(hash); @@ -612,55 +813,62 @@ SilcBool silc_pkcs1_sign_no_oid(void *private_key, /* Pad data */ if (!silc_pkcs1_encode(SILC_PKCS1_BT_PRV1, src, src_len, - padded, len, NULL)) - return FALSE; + padded, len, NULL)) { + sign_cb(FALSE, NULL, 0, context); + return NULL; + } + + stack = silc_stack_alloc(2048, silc_crypto_stack()); - silc_mp_init(&mp_tmp); - silc_mp_init(&mp_dst); + silc_mp_sinit(stack, &mp_tmp); + silc_mp_sinit(stack, &mp_dst); /* Data to MP */ silc_mp_bin2mp(padded, len, &mp_tmp); /* Sign */ - rsa_private_operation(key, &mp_tmp, &mp_dst); + silc_rsa_private_operation(key, &mp_tmp, &mp_dst); /* MP to data */ - silc_mp_mp2bin_noalloc(&mp_dst, signature, len); - *ret_signature_len = len; + silc_mp_mp2bin_noalloc(&mp_dst, padded, len); + + /* Deliver result */ + sign_cb(TRUE, padded, len, context); memset(padded, 0, sizeof(padded)); - silc_mp_uninit(&mp_tmp); - silc_mp_uninit(&mp_dst); - if (hash) + if (compute_hash) memset(hashr, 0, sizeof(hashr)); + silc_mp_suninit(stack, &mp_tmp); + silc_mp_suninit(stack, &mp_dst); + silc_stack_free(stack); - return TRUE; + return NULL; } /* PKCS #1 verify without hash oid */ -SilcBool silc_pkcs1_verify_no_oid(void *public_key, - unsigned char *signature, - SilcUInt32 signature_len, - unsigned char *data, - SilcUInt32 data_len, - SilcHash hash) +SILC_PKCS_ALG_VERIFY(silc_pkcs1_verify_no_oid) { RsaPublicKey *key = public_key; - int ret = TRUE; + SilcBool ret = FALSE; SilcMPInt mp_tmp2; SilcMPInt mp_dst; unsigned char *verify, unpadded[2048 + 1], hashr[SILC_HASH_MAXLEN]; SilcUInt32 verify_len, len = (key->bits + 7) / 8; + SilcStack stack; - silc_mp_init(&mp_tmp2); - silc_mp_init(&mp_dst); + SILC_LOG_DEBUG(("Verify signature")); + + stack = silc_stack_alloc(2048, silc_crypto_stack()); + + silc_mp_sinit(stack, &mp_tmp2); + silc_mp_sinit(stack, &mp_dst); /* Format the signature into MP int */ silc_mp_bin2mp(signature, signature_len, &mp_tmp2); /* Verify */ - rsa_public_operation(key, &mp_tmp2, &mp_dst); + silc_rsa_public_operation(key, &mp_tmp2, &mp_dst); /* MP to data */ verify = silc_mp_mp2bin(&mp_dst, len, &verify_len); @@ -670,28 +878,35 @@ SilcBool silc_pkcs1_verify_no_oid(void *public_key, unpadded, sizeof(unpadded), &len)) { memset(verify, 0, verify_len); silc_free(verify); - silc_mp_uninit(&mp_tmp2); - silc_mp_uninit(&mp_dst); - return FALSE; + silc_mp_suninit(stack, &mp_tmp2); + silc_mp_suninit(stack, &mp_dst); + silc_stack_free(stack); + verify_cb(FALSE, context); + return NULL; } /* Hash data if requested */ if (hash) { silc_hash_make(hash, data, data_len, hashr); data = hashr; + data_len = silc_hash_len(hash); } /* Compare */ - if (memcmp(data, unpadded, len)) - ret = FALSE; + if (len == data_len && !memcmp(data, unpadded, len)) + ret = TRUE; + + /* Deliver result */ + verify_cb(ret, context); memset(verify, 0, verify_len); memset(unpadded, 0, sizeof(unpadded)); - silc_free(verify); - silc_mp_uninit(&mp_tmp2); - silc_mp_uninit(&mp_dst); if (hash) memset(hashr, 0, sizeof(hashr)); + silc_free(verify); + silc_mp_suninit(stack, &mp_tmp2); + silc_mp_suninit(stack, &mp_dst); + silc_stack_free(stack); - return ret; + return NULL; }