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143 lines
5.8 KiB
143 lines
5.8 KiB
diff --git a/crypto/dh/dh_check.c b/crypto/dh/dh_check.c |
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index 7ba2beae7f..e20eb62081 100644 |
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--- a/crypto/dh/dh_check.c |
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+++ b/crypto/dh/dh_check.c |
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@@ -249,6 +249,18 @@ int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key) |
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*/ |
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int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret) |
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{ |
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+ /* Don't do any checks at all with an excessively large modulus */ |
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+ if (BN_num_bits(dh->params.p) > OPENSSL_DH_CHECK_MAX_MODULUS_BITS) { |
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+ ERR_raise(ERR_LIB_DH, DH_R_MODULUS_TOO_LARGE); |
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+ *ret = DH_MODULUS_TOO_LARGE | DH_CHECK_PUBKEY_INVALID; |
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+ return 0; |
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+ } |
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+ |
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+ if (dh->params.q != NULL && BN_ucmp(dh->params.p, dh->params.q) < 0) { |
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+ *ret |= DH_CHECK_INVALID_Q_VALUE | DH_CHECK_PUBKEY_INVALID; |
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+ return 1; |
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+ } |
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+ |
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return ossl_ffc_validate_public_key(&dh->params, pub_key, ret); |
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} |
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diff --git a/crypto/dh/dh_err.c b/crypto/dh/dh_err.c |
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index 4152397426..f76ac0dd14 100644 |
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--- a/crypto/dh/dh_err.c |
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+++ b/crypto/dh/dh_err.c |
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@@ -1,6 +1,6 @@ |
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/* |
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* Generated by util/mkerr.pl DO NOT EDIT |
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- * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
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+ * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. |
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* |
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* Licensed under the Apache License 2.0 (the "License"). You may not use |
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* this file except in compliance with the License. You can obtain a copy |
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@@ -54,6 +54,7 @@ static const ERR_STRING_DATA DH_str_reasons[] = { |
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{ERR_PACK(ERR_LIB_DH, 0, DH_R_PARAMETER_ENCODING_ERROR), |
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"parameter encoding error"}, |
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{ERR_PACK(ERR_LIB_DH, 0, DH_R_PEER_KEY_ERROR), "peer key error"}, |
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+ {ERR_PACK(ERR_LIB_DH, 0, DH_R_Q_TOO_LARGE), "q too large"}, |
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{ERR_PACK(ERR_LIB_DH, 0, DH_R_SHARED_INFO_ERROR), "shared info error"}, |
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{ERR_PACK(ERR_LIB_DH, 0, DH_R_UNABLE_TO_CHECK_GENERATOR), |
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"unable to check generator"}, |
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diff --git a/crypto/dh/dh_key.c b/crypto/dh/dh_key.c |
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index d84ea99241..afc49f5cdc 100644 |
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--- a/crypto/dh/dh_key.c |
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+++ b/crypto/dh/dh_key.c |
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@@ -49,6 +49,12 @@ int ossl_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) |
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goto err; |
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} |
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+ if (dh->params.q != NULL |
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+ && BN_num_bits(dh->params.q) > OPENSSL_DH_MAX_MODULUS_BITS) { |
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+ ERR_raise(ERR_LIB_DH, DH_R_Q_TOO_LARGE); |
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+ goto err; |
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+ } |
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+ |
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if (BN_num_bits(dh->params.p) < DH_MIN_MODULUS_BITS) { |
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ERR_raise(ERR_LIB_DH, DH_R_MODULUS_TOO_SMALL); |
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return 0; |
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@@ -267,6 +273,12 @@ static int generate_key(DH *dh) |
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return 0; |
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} |
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+ if (dh->params.q != NULL |
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+ && BN_num_bits(dh->params.q) > OPENSSL_DH_MAX_MODULUS_BITS) { |
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+ ERR_raise(ERR_LIB_DH, DH_R_Q_TOO_LARGE); |
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+ return 0; |
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+ } |
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+ |
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if (BN_num_bits(dh->params.p) < DH_MIN_MODULUS_BITS) { |
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ERR_raise(ERR_LIB_DH, DH_R_MODULUS_TOO_SMALL); |
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return 0; |
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diff --git a/crypto/err/openssl.txt b/crypto/err/openssl.txt |
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index e51504b7ab..36de321b74 100644 |
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--- a/crypto/err/openssl.txt |
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+++ b/crypto/err/openssl.txt |
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@@ -500,6 +500,7 @@ DH_R_NO_PARAMETERS_SET:107:no parameters set |
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DH_R_NO_PRIVATE_VALUE:100:no private value |
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DH_R_PARAMETER_ENCODING_ERROR:105:parameter encoding error |
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DH_R_PEER_KEY_ERROR:111:peer key error |
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+DH_R_Q_TOO_LARGE:130:q too large |
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DH_R_SHARED_INFO_ERROR:113:shared info error |
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DH_R_UNABLE_TO_CHECK_GENERATOR:121:unable to check generator |
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DSA_R_BAD_FFC_PARAMETERS:114:bad ffc parameters |
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diff --git a/include/crypto/dherr.h b/include/crypto/dherr.h |
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index bb24d131eb..519327f795 100644 |
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--- a/include/crypto/dherr.h |
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+++ b/include/crypto/dherr.h |
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@@ -1,6 +1,6 @@ |
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/* |
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* Generated by util/mkerr.pl DO NOT EDIT |
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- * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. |
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+ * Copyright 2020-2023 The OpenSSL Project Authors. All Rights Reserved. |
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* |
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* Licensed under the Apache License 2.0 (the "License"). You may not use |
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* this file except in compliance with the License. You can obtain a copy |
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diff --git a/include/openssl/dh.h b/include/openssl/dh.h |
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index 6533260f20..50e0cf54be 100644 |
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--- a/include/openssl/dh.h |
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+++ b/include/openssl/dh.h |
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@@ -141,7 +141,7 @@ DECLARE_ASN1_ITEM(DHparams) |
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# define DH_GENERATOR_3 3 |
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# define DH_GENERATOR_5 5 |
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-/* DH_check error codes */ |
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+/* DH_check error codes, some of them shared with DH_check_pub_key */ |
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/* |
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* NB: These values must align with the equivalently named macros in |
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* internal/ffc.h. |
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@@ -151,10 +151,10 @@ DECLARE_ASN1_ITEM(DHparams) |
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# define DH_UNABLE_TO_CHECK_GENERATOR 0x04 |
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# define DH_NOT_SUITABLE_GENERATOR 0x08 |
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# define DH_CHECK_Q_NOT_PRIME 0x10 |
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-# define DH_CHECK_INVALID_Q_VALUE 0x20 |
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+# define DH_CHECK_INVALID_Q_VALUE 0x20 /* +DH_check_pub_key */ |
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# define DH_CHECK_INVALID_J_VALUE 0x40 |
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# define DH_MODULUS_TOO_SMALL 0x80 |
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-# define DH_MODULUS_TOO_LARGE 0x100 |
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+# define DH_MODULUS_TOO_LARGE 0x100 /* +DH_check_pub_key */ |
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/* DH_check_pub_key error codes */ |
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# define DH_CHECK_PUBKEY_TOO_SMALL 0x01 |
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diff --git a/include/openssl/dherr.h b/include/openssl/dherr.h |
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index 5d2a762a96..074a70145f 100644 |
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--- a/include/openssl/dherr.h |
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+++ b/include/openssl/dherr.h |
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@@ -1,6 +1,6 @@ |
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/* |
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* Generated by util/mkerr.pl DO NOT EDIT |
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- * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
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+ * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. |
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* |
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* Licensed under the Apache License 2.0 (the "License"). You may not use |
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* this file except in compliance with the License. You can obtain a copy |
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@@ -50,6 +50,7 @@ |
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# define DH_R_NO_PRIVATE_VALUE 100 |
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# define DH_R_PARAMETER_ENCODING_ERROR 105 |
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# define DH_R_PEER_KEY_ERROR 111 |
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+# define DH_R_Q_TOO_LARGE 130 |
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# define DH_R_SHARED_INFO_ERROR 113 |
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# define DH_R_UNABLE_TO_CHECK_GENERATOR 121 |
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